copy constructor - Page 576

o display an image

- by Vimal Basdeo

I want to display an image from the web to a panel in another Jframe at the click of a button but whenever I click the button first the image loads and during this time the current form potentially freezes and once the image has loaded the form is displayed with the image.. How can I avoid the situation where my form freezes since it is very irritating My codes :: My current class private void btn_TrackbusActionPerformed(java.awt.event.ActionEvent evt) { try { sendMessage("Query,map,$,start,211,Arsenal,!"); System.out.println(receiveMessage()); } catch (UnknownHostException ex) { Logger.getLogger(client_Trackbus.class.getName()).log(Level.SEVERE, null, ex); } catch (IOException ex) { Logger.getLogger(client_Trackbus.class.getName()).log(Level.SEVERE, null, ex); } catch (Exception ex) { Logger.getLogger(client_Trackbus.class.getName()).log(Level.SEVERE, null, ex); } client_trackedbus nextform=new client_trackedbus(planform,connection,packet_receive,packet_send); this.setVisible(false); this.dispose(); nextform.setVisible(true); // TODO add your handling code here: } My next class that displays the image public class client_trackedbus extends javax.swing.JFrame { client_planform planform=null; DatagramSocket connection=null; DatagramPacket packet_receive=null; DatagramPacket packet_send=null; JLabel label=null; /** Creates new form client_trackedbus */ public client_trackedbus(client_planform planform,DatagramSocket connection,DatagramPacket packet_receive,DatagramPacket packet_send) { initComponents(); this.planform=planform; this.connection=connection; this.packet_receive=packet_receive; this.packet_send=packet_send; try { displayMap("http://www.huddletogether.com/projects/lightbox2/images/image-2.jpg", jPanel1, new JLabel()); } catch (MalformedURLException ex) { Logger.getLogger(client_trackedbus.class.getName()).log(Level.SEVERE, null, ex); } } private void displayMap(String url,JPanel panel,JLabel label) throws MalformedURLException{ URL imageurl=new URL(url); Image image=(Toolkit.getDefaultToolkit().createImage(imageurl)); ImageIcon icon = new ImageIcon(image); label.setIcon(icon); panel.add(label); // System.out.println(panel.getSize().width); this.getContentPane().add(panel); } /** This method is called from within the constructor to * initialize the form. * WARNING: Do NOT modify this code. The content of this method is * always regenerated by the Form Editor. */ @SuppressWarnings("unchecked") // <editor-fold defaultstate="collapsed" desc="Generated Code"> private void initComponents() { jPanel1 = new javax.swing.JPanel(); jLabel1 = new javax.swing.JLabel(); btn_Exit = new javax.swing.JButton(); btn_Plan = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); setTitle("Public Transport Journey Planner"); javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1); jPanel1.setLayout(jPanel1Layout); jPanel1Layout.setHorizontalGroup( jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGap(0, 368, Short.MAX_VALUE) ); jPanel1Layout.setVerticalGroup( jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGap(0, 172, Short.MAX_VALUE) ); jLabel1.setFont(new java.awt.Font("Arial", 1, 18)); jLabel1.setText("Your tracked bus"); btn_Exit.setText("Exit"); btn_Exit.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { btn_ExitActionPerformed(evt); } }); btn_Plan.setText("Plan journey"); btn_Plan.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { btn_PlanActionPerformed(evt); } }); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(104, 104, 104) .addComponent(jLabel1)) .addGroup(layout.createSequentialGroup() .addContainerGap() .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGroup(layout.createSequentialGroup() .addGap(65, 65, 65) .addComponent(btn_Plan) .addGap(65, 65, 65) .addComponent(btn_Exit, javax.swing.GroupLayout.PREFERRED_SIZE, 87, javax.swing.GroupLayout.PREFERRED_SIZE))) .addContainerGap(20, Short.MAX_VALUE)) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(35, 35, 35) .addComponent(jLabel1) .addGap(18, 18, 18) .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(18, 18, 18) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(btn_Exit) .addComponent(btn_Plan)) .addContainerGap(12, Short.MAX_VALUE)) ); pack(); }// </editor-fold> private void btn_ExitActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: Exitform(); } private void btn_PlanActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: this.setVisible(false); this.dispose(); this.planform.setVisible(true); } private void Exitform(){ this.setVisible(false); this.dispose(); } /** * @param args the command line arguments */ public static void main(String args[]) { java.awt.EventQueue.invokeLater(new Runnable() { public void run() { // new client_trackedbus().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JButton btn_Exit; private javax.swing.JButton btn_Plan; private javax.swing.JLabel jLabel1; private javax.swing.JPanel jPanel1; // End of variables declaration }

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Using WeakReference to resolve issue with .NET unregistered event handlers causing memory leaks.

- by Eric

The problem: Registered event handlers create a reference from the event to the event handler's instance. If that instance fails to unregister the event handler (via Dispose, presumably), then the instance memory will not be freed by the garbage collector. Example: class Foo { public event Action AnEvent; public void DoEvent() { if (AnEvent != null) AnEvent(); } } class Bar { public Bar(Foo l) { l.AnEvent += l_AnEvent; } void l_AnEvent() { } } If I instantiate a Foo, and pass this to a new Bar constructor, then let go of the Bar object, it will not be freed by the garbage collector because of the AnEvent registration. I consider this a memory leak, and seems just like my old C++ days. I can, of course, make Bar IDisposable, unregister the event in the Dispose() method, and make sure to call Dispose() on instances of it, but why should I have to do this? I first question why events are implemented with strong references? Why not use weak references? An event is used to abstractly notify an object of changes in another object. It seems to me that if the event handler's instance is no longer in use (i.e., there are no non-event references to the object), then any events that it is registered with should automatically be unregistered. What am I missing? I have looked at WeakEventManager. Wow, what a pain. Not only is it very difficult to use, but its documentation is inadequate (see http://msdn.microsoft.com/en-us/library/system.windows.weakeventmanager.aspx -- noticing the "Notes to Inheritors" section that has 6 vaguely described bullets). I have seen other discussions in various places, but nothing I felt I could use. I propose a simpler solution based on WeakReference, as described here. My question is: Does this not meet the requirements with significantly less complexity? To use the solution, the above code is modified as follows: class Foo { public WeakReferenceEvent AnEvent = new WeakReferenceEvent(); internal void DoEvent() { AnEvent.Invoke(); } } class Bar { public Bar(Foo l) { l.AnEvent += l_AnEvent; } void l_AnEvent() { } } Notice two things: 1. The Foo class is modified in two ways: The event is replaced with an instance of WeakReferenceEvent, shown below; and the invocation of the event is changed. 2. The Bar class is UNCHANGED. No need to subclass WeakEventManager, implement IWeakEventListener, etc. OK, so on to the implementation of WeakReferenceEvent. This is shown here. Note that it uses the generic WeakReference that I borrowed from here: http://damieng.com/blog/2006/08/01/implementingweakreferencet I had to add Equals() and GetHashCode() to his class, which I include below for reference. class WeakReferenceEvent { public static WeakReferenceEvent operator +(WeakReferenceEvent wre, Action handler) { wre._delegates.Add(new WeakReference<Action>(handler)); return wre; } public static WeakReferenceEvent operator -(WeakReferenceEvent wre, Action handler) { foreach (var del in wre._delegates) if (del.Target == handler) { wre._delegates.Remove(del); return wre; } return wre; } HashSet<WeakReference<Action>> _delegates = new HashSet<WeakReference<Action>>(); internal void Invoke() { HashSet<WeakReference<Action>> toRemove = null; foreach (var del in _delegates) { if (del.IsAlive) del.Target(); else { if (toRemove == null) toRemove = new HashSet<WeakReference<Action>>(); toRemove.Add(del); } } if (toRemove != null) foreach (var del in toRemove) _delegates.Remove(del); } } public class WeakReference<T> : IDisposable { private GCHandle handle; private bool trackResurrection; public WeakReference(T target) : this(target, false) { } public WeakReference(T target, bool trackResurrection) { this.trackResurrection = trackResurrection; this.Target = target; } ~WeakReference() { Dispose(); } public void Dispose() { handle.Free(); GC.SuppressFinalize(this); } public virtual bool IsAlive { get { return (handle.Target != null); } } public virtual bool TrackResurrection { get { return this.trackResurrection; } } public virtual T Target { get { object o = handle.Target; if ((o == null) || (!(o is T))) return default(T); else return (T)o; } set { handle = GCHandle.Alloc(value, this.trackResurrection ? GCHandleType.WeakTrackResurrection : GCHandleType.Weak); } } public override bool Equals(object obj) { var other = obj as WeakReference<T>; return other != null && Target.Equals(other.Target); } public override int GetHashCode() { return Target.GetHashCode(); } } It's functionality is trivial. I override operator + and - to get the += and -= syntactic sugar matching events. These create WeakReferences to the Action delegate. This allows the garbage collector to free the event target object (Bar in this example) when nobody else is holding on to it. In the Invoke() method, simply run through the weak references and call their Target Action. If any dead (i.e., garbage collected) references are found, remove them from the list. Of course, this only works with delegates of type Action. I tried making this generic, but ran into the missing where T : delegate in C#! As an alternative, simply modify class WeakReferenceEvent to be a WeakReferenceEvent, and replace the Action with Action. Fix the compiler errors and you have a class that can be used like so: class Foo { public WeakReferenceEvent<int> AnEvent = new WeakReferenceEvent<int>(); internal void DoEvent() { AnEvent.Invoke(5); } } Hopefully this will help someone else when they run into the mystery .NET event memory leak!

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Spring MVC configuration problems

- by Smek

i have some problems with configuring Spring MVC. I made a maven multi module project with the following modules: /api /domain /repositories /webapp I like to share the domain and the repositories between the api and the webapp (both web projects). First i want to configure the webapp to use the repositories module so i added the dependencies in the xml file like this: <dependency> <groupId>${project.groupId}</groupId> <artifactId>domain</artifactId> <version>1.0-SNAPSHOT</version> </dependency> <dependency> <groupId>${project.groupId}</groupId> <artifactId>repositories</artifactId> <version>1.0-SNAPSHOT</version> </dependency> And my controller in the webapp module looks like this: package com.mywebapp.webapp; import com.mywebapp.domain.Person; import com.mywebapp.repositories.services.PersonService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; import org.springframework.stereotype.Controller; import org.springframework.ui.ModelMap; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; @Controller @RequestMapping("/") @Configuration @ComponentScan("com.mywebapp.repositories") public class PersonController { @Autowired PersonService personservice; @RequestMapping(method = RequestMethod.GET) public String printWelcome(ModelMap model) { Person p = new Person(); p.age = 23; p.firstName = "John"; p.lastName = "Doe"; personservice.createNewPerson(p); model.addAttribute("message", "Hello world!"); return "index"; } } In my webapp module i try to load configuration files in my web.xml like this: <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:/META-INF/persistence-context.xml, classpath:/META-INF/service-context.xml</param-value> </context-param> These files cannot be found so i get the following error: org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from class path resource [META-INF/persistence-context.xml]; nested exception is java.io.FileNotFoundException: class path resource [META-INF/persistence-context.xml] cannot be opened because it does not exist These files are in the repositories module so my first question is how can i make Spring to find these files? I also have trouble Autowiring the PersonService to my Controller class did i forget to configure something in my XML? Here is the error message: [INFO] [talledLocalContainer] SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener [INFO] [talledLocalContainer] org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'personServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.mywebapp.repositories.repository.PersonRepository com.mywebapp.repositories.services.PersonServiceImpl.personRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.mywebapp.repositories.repository.PersonRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} PersonServiceImple.java: package com.mywebapp.repositories.services; import com.mywebapp.domain.Person; import com.mywebapp.repositories.repository.PersonRepository; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.mongodb.core.MongoTemplate; import org.springframework.stereotype.Service; @Service public class PersonServiceImpl implements PersonService{ @Autowired public PersonRepository personRepository; @Autowired public MongoTemplate personTemplate; @Override public Person createNewPerson(Person person) { return personRepository.save(person); } } PersonService.java package com.mywebapp.repositories.services; import com.mywebapp.domain.Person; public interface PersonService { Person createNewPerson(Person person); } PersonRepository.java: package com.mywebapp.repositories.repository; import com.mywebapp.domain.Person; import org.springframework.data.mongodb.repository.MongoRepository; import org.springframework.stereotype.Repository; import java.math.BigInteger; @Repository public interface PersonRepository extends MongoRepository<Person, BigInteger> { } persistance-context.xml <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mongo="http://www.springframework.org/schema/data/mongo" xsi:schemaLocation= "http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/data/mongo http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"> <context:property-placeholder location="classpath:mongo.properties"/> <mongo:mongo host="${mongo.host}" port="${mongo.port}" id="mongo"> <mongo:options connections-per-host="${mongo.connectionsPerHost}" threads-allowed-to-block-for-connection-multiplier="${mongo.threadsAllowedToBlockForConnectionMultiplier}" connect-timeout="${mongo.connectTimeout}" max-wait-time="${mongo.maxWaitTime}" auto-connect-retry="${mongo.autoConnectRetry}" socket-keep-alive="${mongo.socketKeepAlive}" socket-timeout="${mongo.socketTimeout}" slave-ok="${mongo.slaveOk}" write-number="1" write-timeout="0" write-fsync="true"/> </mongo:mongo> <mongo:db-factory dbname="person" mongo-ref="mongo" id="mongoDbFactory"/> <bean id="personTemplate" name="personTemplate" class="org.springframework.data.mongodb.core.MongoTemplate"> <constructor-arg name="mongoDbFactory" ref="mongoDbFactory"/> </bean> <mongo:repositories base-package="com.mywebapp.repositories.repository" mongo-template-ref="personTemplate"> <mongo:repository id="personRepository" repository-impl-postfix="PersonRepository" mongo-template-ref="personTemplate" create-query-indexes="true"/> </mongo:repositories> Thanks

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internet explorer and google chrome rendering issues

- by jeansymolanza

hi guys, i'm trying to build a login and main page on dreamweaver for a client and testing them in google chrome and internet explorer but i am running into a lot of unexpected difficulties. the main thing has to be the way the tables are being rendered on the different pages. it seems to appear well on google chrome but when i test the page under internet explorer there have been issues with the way the footer is being rendered. i've included several images showing the problem: login page on IE8 http://i39.tinypic.com/iz9lw3.jpg login page on google chrome http://i44.tinypic.com/1zn0qd2.jpg main page on IE8 http://i41.tinypic.com/2d0gyhf.jpg main page on google chrome http://i42.tinypic.com/2ry58aw.jpg login fail on IE8 http://i40.tinypic.com/2jea9ac.jpg login fail on google chrome http://i43.tinypic.com/sl35h2.jpg please help! i have included the source code below. i spent an entire night trying to figure out what was wrong but to little success. login page: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" href="resources/css_01.css"> <link rel="shortcut icon" href="resources/favicon.ico"> <title>Speedy CMS</title> <script src="SpryAssets/SpryValidationTextField.js" type="text/javascript"></script> <script src="SpryAssets/SpryValidationPassword.js" type="text/javascript"></script> <link href="SpryAssets/SpryValidationTextField.css" rel="stylesheet" type="text/css" /> <link href="SpryAssets/SpryValidationPassword.css" rel="stylesheet" type="text/css" /> </head> <body class="oneColElsCtr" background="resources/bg_01.jpg"> <div id="container"> <div id="mainContent">  <table id="Table_01" width="1024" height="100%" border="0" cellpadding="0" cellspacing="0"> <tr> <td valign="top" rowspan="3"> <img src="resources/login_01.png" width="93" height="440" alt=""></td> <td valign="top" rowspan="3"> <img src="resources/login_02.png" width="457" height="440" alt=""></td> <td valign="top"> <img src="resources/login_03.png" width="474" height="86" alt=""></td> </tr> <tr> <td valign="top"><img src="resources/login_04.png" width="474" height="89" /></td> </tr> <tr> <td valign="top" width="100%" height="100%" align="left"> <form ACTION="<?php echo $loginFormAction; ?>" METHOD="POST" name="login" > <h3 class="login">Username</h3> <span id="sprytextfield1"> <input name="username" type="text" class="input" /> </span> <h3 class="login">Password</h3> <span id="sprypassword1"> <input name="password" type="password" class="input" /> </span> <p></p> <div align="left" style="width:474px; padding-top: 10px; padding-left: 100px;"> <input name="login" type="submit" id="Log in" value="Log in" class="btn"/> </div> </p> </form> </td> </tr> </table> </div> </div>   <?php include("resources/footer.php"); ?>  <script type="text/javascript">  </script> </body> </html> main page: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" href="resources/css_01.css"> <link rel="shortcut icon" href="resources/favicon.ico"> <title>Speedy CMS</title> <body class="oneColElsCtr" background="resources/bg_01.jpg"> <div id="container"> <div id="mainContent">  <table id="Table_01" width="1024" border="0" cellpadding="0" cellspacing="0"> <tr> <td rowspan="7"> <img src="resources/main_01.png" width="93" height="440" alt=""></td> <td colspan="2"> <img src="resources/main_02.png" width="457" height="95" alt=""></td> <td colspan="3" valign="bottom">  <?php include("resources/navbar.php"); ?>  </td> </tr> <tr> <td colspan="2"> <img src="resources/main_04.png" width="457" height="1" alt=""></td> <td colspan="3" rowspan="2" valign="top"><a class="bottom2" href="<?php echo $logoutAction ?>">Log off</a></td> </tr> <tr> <td colspan="2"> <img src="resources/main_06.png" width="457" height="29" alt=""></td> </tr> <tr> <td rowspan="4"> <img src="resources/main_07.png" width="456" height="315" alt=""></td> <td colspan="2"> <img src="resources/main_08.png" width="75" height="94" alt=""></td> <td rowspan="3"> <img src="resources/main_09.png" width="6" height="281" alt=""></td> <td align="left" valign="middle" style="padding-left:20px;"><h2 class="home">Hello, <?php echo $_SESSION['MM_Username']; ?></h2></td> </tr> <tr> <td rowspan="3"> <img src="resources/main_11.png" width="1" height="221" alt="" /></td> <td> <img src="resources/main_12.png" width="74" height="90" alt=""></td> <td align="left" valign="middle" style="padding-left:20px;"><h3 class="home"><?php echo date("l F d, Y, h:i A"); ?></h3></td> </tr> <tr> <td> <img src="resources/main_14.png" width="74" height="97" alt="" /></td> <td align="left" valign="middle" style="padding-left:20px;"><h3 class="home">You currently have <a href="progress.php" class="main"><?php echo $totalCases; ?> claims</a> running</h3></td> </tr> <tr> <td colspan="3"> <img src="resources/main_16.png" width="474" height="34" alt=""></td> </tr> </table> </div> </div>   <?php include("resources/footer.php"); ?>  </body> </html> <?php mysql_free_result($tbl_accident); ?> login fail page <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" href="resources/css_01.css"> <link rel="shortcut icon" href="resources/favicon.ico"> <title>Speedy CMS</title> <script src="SpryAssets/SpryValidationTextField.js" type="text/javascript"></script> <script src="SpryAssets/SpryValidationPassword.js" type="text/javascript"></script> <link href="SpryAssets/SpryValidationTextField.css" rel="stylesheet" type="text/css" /> <link href="SpryAssets/SpryValidationPassword.css" rel="stylesheet" type="text/css" /> </head> <body class="oneColElsCtr" background="resources/bg_02.jpg"> <div id="container"> <div id="mainContent"> <table id="Table_01" width="1024" height="" border="0" cellpadding="0" cellspacing="0"> <tr> <td rowspan="4"> <img src="resources/default2_01.png" width="93" height="440" alt=""></td> <td colspan="2"><img src="resources/default_02.png" width="457" height="95" /></td> <td valign="bottom"></td> </tr> <tr> <td colspan="2"> <img src="resources/default2_03.png" width="457" height="1" alt=""></td> <td> <img src="resources/default2_04.png" width="474" height="1" alt=""></td> </tr> <tr> <td colspan="3"> <div align="left" style="padding-left: 18px;"> <h3 class="loginfail">Sorry, but your username and password is incorrect.</h3> <h4 class="loginfail">Please try again!</h4> <form ACTION="<?php echo $loginFormAction; ?>" METHOD="POST" name="login" > <h5 class="loginfail">Username</h5> <span id="sprytextfield1"> <input name="username" type="text" class="input2" /> </span> <h5 class="loginfail">Password</h5> <span id="sprypassword1"> <input name="password" type="password" class="input2" /> </span> <img src="resources/spacer.gif" width="1" height="5" alt="" /> <p></p> <div align="left" style="width:474px; padding-top: 10px;"> <input name="login" type="submit" id="Log in" value="Log in" class="btn"/> </div> </p> </form> </td> </tr> <tr> <td colspan="3" height="100%"> </td> </tr> <tr> <td> <img src="resources/spacer.gif" width="93" height="1" alt=""></td> <td> <img src="resources/spacer.gif" width="337" height="1" alt=""></td> <td> <img src="resources/spacer.gif" width="120" height="1" alt=""></td> <td> <img src="resources/spacer.gif" width="474" height="1" alt=""></td> </tr> </table> </div> </div>  <?php include("resources/footer2.php"); ?>  <script type="text/javascript">  </script> </body> </html> footer.php <table width="1024px" border="0" cellspacing="0" cellpadding="0" style="padding-left: 200px; padding-top: 10px; padding-bottom: 36px; text-align: left;">  <td width="33%" valign="top"> <div class="bottom" style="padding-left: 40px; text-align: left;">Learn About Us</div> <div class="hr" style="margin-left: 40px; width: 200px;"><hr /></div> <div style="padding-left: 40px; text-align: left;"> <a href="http://www.speedyclaim.co.uk/php/gifts.php" class="bottom2" target="_blank">Free Gifts</a><BR /> <a href="http://www.speedyclaim.co.uk/php/calculator.php" class="bottom2" target="_blank">Injury Calculator</a><BR /> <a href="http://www.speedyclaim.co.uk/php/aboutus.php" class="bottom2" target="_blank">About Us</a><BR /> <a href="http://www.speedyclaim.co.uk/php/claimonline.php" class="bottom2" target="_blank">Claim Online</a><BR /> <a href="http://www.speedyclaim.co.uk/php/contactus.php" class="bottom2" target="_blank">Contact Us</a><BR /> </div> </td>  <td width="33%" valign="top"> <div class="bottom" style="padding-left: 40px; text-align: left;">Get Help</div> <div class="hr" style="margin-left: 40px; width: 200px;"><hr /></div> <div style="padding-left: 40px;"> <a href="http://www.speedyclaim.co.uk/php/services.php#roadaccident" class="bottom2" target="_blank">Road Traffic Accident</a><BR /> <a href="http://www.speedyclaim.co.uk/php/services.php#workaccident" class="bottom2" target="_blank">Work Accident</a><BR /> <a href="http://www.speedyclaim.co.uk/php/services.php#criminalinjury" class="bottom2" target="_blank">Criminal Injury</a><BR /> <a href="http://www.speedyclaim.co.uk/php/services.php#medicalnegligence" class="bottom2" target="_blank">Medical Neglicence</a><BR /> <a href="http://www.speedyclaim.co.uk/php/services.php#publicl" class="bottom2" target="_blank">Public Liability</a><BR /> <a href="http://www.speedyclaim.co.uk/php/services.php#taxiaccident" class="bottom2" target="_blank">Taxi Related Accident</a><BR /> </div>  <td width="33%" valign="top"> <div class="bottom" style="padding-left: 40px; text-align: left;">Taxi Service</div> <div class="hr" style="margin-left: 40px; width: 200px;"><hr /></div> <div style="padding-left: 40px;"> <a href="http://www.speedlinetaxi.com/airport.asp" class="bottom2" target="_blank">Airport Meet & Greet</a><BR /> <a href="http://www.speedlinetaxi.com/register.asp" class="bottom2" target="_blank">Automated Booking</a><BR /> <a href="http://www.speedlinetaxi.com/business.asp" class="bottom2" target="_blank">Business Accounts</a><BR /> <a href="http://www.speedlinetaxi.com/technology.asp" class="bottom2" target="_blank">Technology</a><BR /> <a href="https://ebook.autocab.net/3037" class="bottom2" target="_blank">E-Booking</a><BR /> <a href="http://www.speedlinetaxi.com/recruitment.asp" class="bottom2" target="_blank">Recruitment</a><BR /> <a href="http://www.speedlinetaxi.com/feedback.asp" class="bottom2" target="_blank">Feedback</a><BR /> <BR /> </div> </td> <tr> <td colspan="3" valign="top" style="padding-top:5px; padding-left:40px;"> <span class="bottom"> © <?php echo date("Y")?> Speedline </span> </td> </tr> </table> footer2.php <table width="100%" border="0" cellspacing="0" cellpadding="0" style="padding-left: 188px; padding-top: 10px; text-align: left;" align="center">  <tr> <td width="99%" valign="top" style="padding-top:5px; padding-left:40px; padding-bottom: 10px;"> <span class="bottom"> © <?php echo date("Y")?> Speedline </span> </td> </tr> </table> css_01.css html, body { height: 100%; margin: 0 0 1px; padding: 0; } body { font: 100% Arial, Helvetica, sans-serif; background-repeat: repeat-x; margin: 0; /* it's good practice to zero the margin and padding of the body element to account for differing browser defaults */ padding: 0; text-align: center; /* this centers the container in IE 5* browsers. The text is then set to the left aligned default in the #container selector */ color: #000000; } .oneColElsCtr #container { width: 1024px; margin: 0 auto; /* the auto margins (in conjunction with a width) center the page */ text-align: left; /* this overrides the text-align: center on the body element. */ } .oneColElsCtr #mainContent { padding: 0 0px; /* remember that padding is the space inside the div box and margin is the space outside the div box */ text-align: right; } .loginfail { font-family: Arial, Helvetica, sans-serif; text-decoration:none; color: #3399cc; } .login { font-family: Arial, Helvetica, sans-serif; text-decoration:none; color: #3399cc; padding-left: 100px; } .navbar { font-family: Arial, Helvetica, sans-serif; text-decoration:none; color: #FFF; font-size: 16px; } .navbar:hover { font-family: Arial, Helvetica, sans-serif; text-decoration:underline; color: #FFF; font-size: 16px; } .login2 { font-family: Arial, Helvetica, sans-serif; font-size: 10px; text-decoration:none; color: #3399cc; } .window { font-family: Arial, Helvetica, sans-serif; font-size: 12px; text-decoration:none; } .login2:hover { font-family: Arial, Helvetica, sans-serif; font-size: 10px; text-decoration:underline; color: #3399cc; } .main { font-family: Arial, Helvetica, sans-serif; text-decoration:none; color: #3399cc; } .main:hover { font-family: Arial, Helvetica, sans-serif; text-decoration:underline; color: #3399cc; } .form { font-family: Arial, Helvetica, sans-serif; text-decoration:none; color: #3399cc; } .form:hover { font-family: Arial, Helvetica, sans-serif; text-decoration:underline; color: #3399cc; } .input { margin-left: 100px; background-color:#FFF; border: none; width: 14em; height: 1.2em; font-family: Arial, Helvetica, sans-serif; font-size: 22px; } .input2 { background-color: #F2F2F2; border: none; width: 14em; height: 1.2em; font-family: Arial, Helvetica, sans-serif; font-size: 22px; } .btn { height: 2em; width: 8em; color: #FFF; background: #3399cc; font-weight: bold; font-size: 18px; border: none; } .btn:hover { color: #FFF; background: #333; cursor: pointer; /* cursor: hand; for IE5 */ } .bottom { font-family: Arial, Helvetica, sans-serif; font-size: 12px; font-weight: bold; color: #7e8081; } .bottom2 { font-family: Arial, Helvetica, sans-serif; font-size: 12px; text-decoration: none; color: #7e8081; } .bottom2:hover { font-family: Arial, Helvetica, sans-serif; font-size: 12px; text-decoration: underline; color: #7e8081; } .bottom3 { font-family: Arial, Helvetica, sans-serif; font-size: 12px; text-decoration: none; color: #333; } .bottom3:hover { font-family: Arial, Helvetica, sans-serif; font-size: 12px; text-decoration: underline; color: #333; } div.hr { height: 1px; background: #CCC url(hr1.gif) no-repeat scroll center; } div.hr hr { display: none; } .home { font-family: Arial, Helvetica, sans-serif; text-decoration:none; color: #3399cc; } .form2 { font-family: Arial, Helvetica, sans-serif; text-decoration:none; font-size: 12px; } .rta {border-width: 1px; border-style: solid; border-color: #CCC; } .box { width: 100%; padding-right: 3px; color: #000; text-decoration:none; } .box:hover { width: 100%; padding-right: 3px; color: #000; text-decoration:underline;} .box2 { width: 100%; color: #C00; text-decoration:none; } .box2:hover { width: 100%; padding-right: 3px; color: #C00; text-decoration:underline;} thanking in you advance. God bless.

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inserting null values in datetime column and integer column

- by reggie

I am using C# and developing a winform application. I have a project class which has the project attributes. the constructor of the project class is as follows: newProject = new Project(GCD_ID.IsNull() ? (int?)null : Convert.ToInt32(GCD_ID), txt_Proj_Desc.Text, txt_Prop_Name.Text, ST.ID.ToString().IsNull() ? null: ST.ID.ToString(), cmbCentre.Text, SEC.ID.ToString().IsNull() ? null : SEC.ID.ToString(), cmbZone.Text, FD.ID.ToString().IsNull() ? null : FD.ID.ToString(), DT.ID.ToString().IsNull() ? null : DT.ID.ToString(), OP.ID.ToString().IsNull() ? null : OP.ID.ToString(), T.ID.ToString().IsNull() ? null : T.ID.ToString(), CKV.ID.ToString().IsNull() ? null : CKV.ID.ToString(), STAT.ID.ToString().IsNull() ? null : STAT.ID.ToString(), MW.IsNull() ? (Double?)null : Convert.ToDouble(MW), txt_Subject.Text, Ip_Num.IsNull() ? (int?)null : Convert.ToInt32(Ip_Num), H1N_ID.IsNull() ? (int?)null : Convert.ToInt32(H1N_ID), NOMS_Slip_Num.IsNull() ? (int?)null : Convert.ToInt32(NOMS_Slip_Num), NMS_Updated.IsNull() ? (DateTime?)null : Convert.ToDateTime(NMS_Updated), Received_Date.IsNull() ? (DateTime?)null : Convert.ToDateTime(Received_Date), Actual_IS_Date.IsNull() ? (DateTime?)null : Convert.ToDateTime(Actual_IS_Date), Scheduled_IS_Date.IsNull() ? (DateTime?)null : Convert.ToDateTime(Scheduled_IS_Date), UpSt.ID.ToString().IsNull() ? null : UpSt.ID.ToString(), UpFd.ID.ToString().IsNull() ? null : UpFd.ID.ToString(), txtHVCircuit.Text, cmbbxSIA.Text); My problem is that i cannot insert values into the database when the datetime variables and the integer variables are null. all this data are assigned to the variable from textboxes on the form.. bELOW is the database function which takes in all the variables and insert them into the database. public static void createNewProject(int? GCD_ID, string Project_Desc, string Proponent_Name, int Station_ID, string OpCentre, int Sector_ID, string PLZone, int Feeder, int DxTx_ID, int OpControl_ID, int Type_ID, int ConnKV_ID, int Status_ID, double? MW, string Subject, int? Ip_Num, int? H1N_ID, int? NOMS_Slip_Num, DateTime? NMS_Updated, DateTime? Received_Date, DateTime? Actual_IS_Date, DateTime? Scheduled_IS_Date, int UP_Station_ID, int UP_Feeder_ID, string @HV_Circuit, string SIA_Required) { SqlConnection conn = null; try { //Takes in all the employee details to be added to the database. conn = new SqlConnection(databaseConnectionString); conn.Open(); SqlCommand cmd = new SqlCommand("createNewProject", conn); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add(new SqlParameter("GCD_ID", GCD_ID)); cmd.Parameters.Add(new SqlParameter("Project_Desc", MiscFunctions.Capitalize(Project_Desc))); cmd.Parameters.Add(new SqlParameter("Proponent_Name", MiscFunctions.Capitalize(Proponent_Name))); cmd.Parameters.Add(new SqlParameter("Station_ID", Station_ID)); cmd.Parameters.Add(new SqlParameter("OpCentre", OpCentre)); cmd.Parameters.Add(new SqlParameter("Sector_ID", Sector_ID)); cmd.Parameters.Add(new SqlParameter("PLZone", PLZone)); cmd.Parameters.Add(new SqlParameter("Feeder", Feeder)); cmd.Parameters.Add(new SqlParameter("DxTx_ID", DxTx_ID)); cmd.Parameters.Add(new SqlParameter("OpControl_ID", OpControl_ID)); cmd.Parameters.Add(new SqlParameter("Type_ID", Type_ID)); cmd.Parameters.Add(new SqlParameter("ConnKV_ID", ConnKV_ID)); cmd.Parameters.Add(new SqlParameter("Status_ID", Status_ID)); cmd.Parameters.Add(new SqlParameter("MW", MW)); cmd.Parameters.Add(new SqlParameter("Subject", Subject)); cmd.Parameters.Add(new SqlParameter("Ip_Num", Ip_Num)); cmd.Parameters.Add(new SqlParameter("H1N_ID", H1N_ID)); cmd.Parameters.Add(new SqlParameter("NOMS_Slip_Num", NOMS_Slip_Num)); cmd.Parameters.Add(new SqlParameter("NMS_Updated", NMS_Updated)); cmd.Parameters.Add(new SqlParameter("Received_Date", Received_Date)); cmd.Parameters.Add(new SqlParameter("Actual_IS_Date", Actual_IS_Date)); cmd.Parameters.Add(new SqlParameter("Scheduled_IS_Date", Scheduled_IS_Date)); cmd.Parameters.Add(new SqlParameter("UP_Station_ID", UP_Station_ID)); cmd.Parameters.Add(new SqlParameter("UP_Feeder_ID", UP_Feeder_ID)); cmd.Parameters.Add(new SqlParameter("HV_Circuit", HV_Circuit)); cmd.Parameters.Add(new SqlParameter("SIA_Required", SIA_Required)); cmd.ExecuteNonQuery(); } catch (Exception e) //returns if error incurred. { MessageBox.Show("Error occured in createNewProject" + Environment.NewLine + e.ToString()); } finally { if (conn != null) { conn.Close(); } } } My question is, how do i insert values into the database. please please help

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Custom View embed in Gallery crashes while key press

- by tao

Hi there, I'd like to find some stuff to replace the Tab component, so I'd make a custom View named StringView, which has the ability to display text, and to embed it into a Gallery. But it always crashes with error "NullPointerException at InputMethodManager". I have no idea about this, any help&tip&suggest are appreciate. Detail of my issue: First I'd created a class StringView extends View: public class StringView extends View { protected final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); protected String mString; protected int mAscent; // Constructor public StringView(Context context, String string) { super(context); mPaint.setARGB(255, 255, 60, 10); mPaint.setTextSize(30); //mPaint.setFakeBoldText(true); mString = string; setPadding(20,15,20,15); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); int w = this.getPaddingLeft(); int h = this.getPaddingTop() - mAscent; canvas.drawText(mString, w, h, mPaint); } public void setString(String str) { mString = str; this.requestLayout(); this.invalidate(); } public String getString() { return mString; } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { setMeasuredDimension(measureWidth(widthMeasureSpec), measureHeight(heightMeasureSpec)); } /** * Determines the width of this view * @param measureSpec A measureSpec packed into an int * @return The width of the view, honoring constraints from measureSpec */ private int measureWidth(int measureSpec) { int result = 0; int specMode = MeasureSpec.getMode(measureSpec); int specSize = MeasureSpec.getSize(measureSpec); if (specMode == MeasureSpec.EXACTLY) { // We were told how big to be result = specSize; } else { // Measure the text result = (int) mPaint.measureText(mString) + getPaddingLeft() + getPaddingRight(); if (specMode == MeasureSpec.AT_MOST) { // Respect AT_MOST value if that was what is called for by measureSpec result = Math.min(result, specSize); } } return result; } /** * Determines the height of this view * @param measureSpec A measureSpec packed into an int * @return The height of the view, honoring constraints from measureSpec */ private int measureHeight(int measureSpec) { int result = 0; int specMode = MeasureSpec.getMode(measureSpec); int specSize = MeasureSpec.getSize(measureSpec); mAscent = (int) mPaint.ascent(); if (specMode == MeasureSpec.EXACTLY) { // We were told how big to be result = specSize; } else { // Measure the text (beware: ascent is a negative number) result = (int) (-mAscent + mPaint.descent()) + getPaddingTop() + getPaddingBottom(); if (specMode == MeasureSpec.AT_MOST) { // Respect AT_MOST value if that was what is called for by measureSpec result = Math.min(result, specSize); } } return result; } } Second I put it in to Gallery through Adapter Gallery gallery = (Gallery) findViewById(R.id.gallery); gallery.setAdapter(new ImageAdapter(this)); ImageAdapter: public class ImageAdapter extends BaseAdapter { int mGalleryItemBackground; private Context mContext; private View[] mImages = genSerielImageViews(); public ImageAdapter(Context c) { mContext = c; TypedArray a = obtainStyledAttributes(R.styleable.Gallery); mGalleryItemBackground = a.getResourceId( R.styleable.Gallery_android_galleryItemBackground, 0); a.recycle(); } private View[] genSerielImageViews() { if (true) { int N = 6; StringView[] views = new StringView[N]; for (int i=0; i<N; i++) { views[i] = new StringView(mContext, "ITEM #" + Integer.toString(i) ); } return views; } else { int N = 6; TextView[] views = new TextView[N]; for (int i=0; i<N; i++) { views[i] = new TextView( mContext ); views[i].setText("CCTV #" + Integer.toString(i) ); } return views; } } public int getCount() { return mImages.length; } public Object getItem(int position) { return position; } public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { return mImages[position]; } } Then Compile&Run, press keypad RIGHT and I got a crash, It's turns out a weird InputMethodManager error: 03-18 07:22:33.568: ERROR/AndroidRuntime(958): Uncaught handler: thread main exiting due to uncaught exception 03-18 07:22:33.648: ERROR/AndroidRuntime(958): java.lang.NullPointerException 03-18 07:22:33.648: ERROR/AndroidRuntime(958): at android.view.inputmethod.InputMethodManager.startInputInner(InputMethodManager.java:940) 03-18 07:22:33.648: ERROR/AndroidRuntime(958): at android.view.inputmethod.InputMethodManager.checkFocus(InputMethodManager.java:1114) 03-18 07:22:33.648: ERROR/AndroidRuntime(958): at android.view.ViewRoot.handleMessage(ViewRoot.java:1869) 03-18 07:22:33.648: ERROR/AndroidRuntime(958): at android.os.Handler.dispatchMessage(Handler.java:99) 03-18 07:22:33.648: ERROR/AndroidRuntime(958): at android.os.Looper.loop(Looper.java:123) 03-18 07:22:33.648: ERROR/AndroidRuntime(958): at android.app.ActivityThread.main(ActivityThread.java:4310) 03-18 07:22:33.648: ERROR/AndroidRuntime(958): at java.lang.reflect.Method.invokeNative(Native Method) 03-18 07:22:33.648: ERROR/AndroidRuntime(958): at java.lang.reflect.Method.invoke(Method.java:521) 03-18 07:22:33.648: ERROR/AndroidRuntime(958): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 03-18 07:22:33.648: ERROR/AndroidRuntime(958): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 03-18 07:22:33.648: ERROR/AndroidRuntime(958): at dalvik.system.NativeStart.main(Native Method) Thanks.

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Problem deploying servlets in JBoss 5.1 on eclipse.

- by Jeremy Goodell

Yesterday I created a simple image servlet and attempted to deploy it. I am getting an error on JBoss startup, and then further errors on trying to invoke the servlet. I spent about 8 hours yesterday searching the web for answers and trying different scenarios. I ended up making my JBoss problems worse and then fixing them, but I never did get the servlet to work. The servlet is com.controller.MyImageServlet, and looks like this: package com.controller; import javax.servlet.http.*; /** * Servlet implementation class MyImageServlet */ public class MyImageServlet extends HttpServlet { private static final long serialVersionUID = 1L; public MyImageServlet() { super(); } // Process the HTTP Get request public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { /* ... */ } } The tags I've added to web.xml looks like this: <servlet> <servlet-name>ImageServlet</servlet-name> <servlet-class>com.controller.MyImageServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>ImageServlet</servlet-name> <url-pattern>/CERTIMAGE/*</url-pattern> </servlet-mapping> On server startup, this is the only indication in the log that something is amiss: 01:59:25,328 WARN [JAXWSDeployerHookPreJSE] Cannot load servlet class: com.controller.MyImageServlet When I try the URL pattern (http://localhost:9980/CERTIMAGE/1), I get the following stack trace in the log (and in the Browser): 01:59:39,640 INFO [[/]] Marking servlet ImageServlet as unavailable 01:59:39,640 ERROR [[ImageServlet]] Allocate exception for servlet ImageServlet java.lang.ClassNotFoundException: com.controller.MyImageServlet at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) at org.jboss.web.tomcat.service.TomcatInjectionContainer.newInstance(TomcatInjectionContainer.java:262) at org.jboss.web.tomcat.service.TomcatInjectionContainer.newInstance(TomcatInjectionContainer.java:256) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1006) at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:777) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92) at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126) at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) If I try the URL pattern again, I get the following message in the log: 09:33:32,390 INFO [[ImageServlet]] Servlet ImageServlet is currently unavailable I have verified that MyImageServlet.class is in the WAR at WEB-INF/classes/com/controller/images. As a matter of fact, I even added some code to one of my JSPs to attempt to instantiate the Servlet and call the doGet method. This actually works and outputs the correct debug sequences to the log indicating that the Servlet constructor and doGet methods were called. I also tried following some instructions for creating/deploying a very simple HelloWorld servlet, and that has exactly the same problem. Note that web.xml already contained a servlet put there by JBoss: org.jboss.web.tomcat.service.StatusServlet -- that Servlet does not give any errors in the log. As an experiment, I removed ".web" from that path and ended up getting exactly the same error as I'm getting on my Servlet. So it would appear that JBoss is not able to locate my Servlet given the specified path. Just for kicks, I've tried all sorts of other paths, like just plain MyImageServlet, controller.MyImageServlet, and more. Also, the servlet was originally named ImageServlet, but I attempted the name change thinking maybe there was some conflict with an existing ImageServlet. In all cases, the behavior is the same. After all of my research yesterday, I would say that this appears to be a problem with the JBoss servlet container, and I also learned that JBoss 5.1.0.GA should come bundled with a tomcat servlet container. I installed JBoss on my PC (Windows XP) myself less than 2 months ago (from jboss.org) and used it pretty much as is. Note that I am running on JDK 1.6, so I did use the jboss-jdk6 installation version. I am running on Windows, but I also deploy to a Linux virtual dedicated server. I deployed the current version of my program, including the servlet to the Linux box, but I get the exact same errors. I'm reluctant to just try reinstalling JBoss, since it's hard to place the blame on the JBoss installation when I get the same errors on two completely different installations. I am a bit suspicious of the bundled tomcat servlet container, because using eclipse, I haven't been able to locate any indication that there is a tomcat bundled into JBoss. I did locate servlet-api.jar in the JBoss common/lib directory. This is on the eclipse build path. One possibly useful note: I had previously used a standalone tomcat server for other projects using the same eclipse, so maybe it's some sort of eclipse issue? But, as I said, I do get the same errors when I deploy to the Linux server, and that deployment process just involves ftping files to the server and then putting them into the deployed war package and restarting JBoss. Thanks for any help you can provide.

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How to get javascript object references or reference count?

- by Tauren

How to get reference count for an object Is it possible to determine if a javascript object has multiple references to it? Or if it has references besides the one I'm accessing it with? Or even just to get the reference count itself? Can I find this information from javascript itself, or will I need to keep track of my own reference counters. Obviously, there must be at least one reference to it for my code access the object. But what I want to know is if there are any other references to it, or if my code is the only place it is accessed. I'd like to be able to delete the object if nothing else is referencing it. If you know the answer, there is no need to read the rest of this question. Below is just an example to make things more clear. Use Case In my application, I have a Repository object instance called contacts that contains an array of ALL my contacts. There are also multiple Collection object instances, such as friends collection and a coworkers collection. Each collection contains an array with a different set of items from the contacts Repository. Sample Code To make this concept more concrete, consider the code below. Each instance of the Repository object contains a list of all items of a particular type. You might have a repository of Contacts and a separate repository of Events. To keep it simple, you can just get, add, and remove items, and add many via the constructor. var Repository = function(items) { this.items = items || []; } Repository.prototype.get = function(id) { for (var i=0,len=this.items.length; i<len; i++) { if (items[i].id === id) { return this.items[i]; } } } Repository.prototype.add = function(item) { if (toString.call(item) === "[object Array]") { this.items.concat(item); } else { this.items.push(item); } } Repository.prototype.remove = function(id) { for (var i=0,len=this.items.length; i<len; i++) { if (items[i].id === id) { this.removeIndex(i); } } } Repository.prototype.removeIndex = function(index) { if (items[index]) { if (/* items[i] has more than 1 reference to it */) { // Only remove item from repository if nothing else references it this.items.splice(index,1); return; } } } Note the line in remove with the comment. I only want to remove the item from my master repository of objects if no other objects have a reference to the item. Here's Collection: var Collection = function(repo,items) { this.repo = repo; this.items = items || []; } Collection.prototype.remove = function(id) { for (var i=0,len=this.items.length; i<len; i++) { if (items[i].id === id) { // Remove object from this collection this.items.splice(i,1); // Tell repo to remove it (only if no other references to it) repo.removeIndxe(i); return; } } } And then this code uses Repository and Collection: var contactRepo = new Repository([ {id: 1, name: "Joe"}, {id: 2, name: "Jane"}, {id: 3, name: "Tom"}, {id: 4, name: "Jack"}, {id: 5, name: "Sue"} ]); var friends = new Collection( contactRepo, [ contactRepo.get(2), contactRepo.get(4) ] ); var coworkers = new Collection( contactRepo, [ contactRepo.get(1), contactRepo.get(2), contactRepo.get(5) ] ); contactRepo.items; // contains item ids 1, 2, 3, 4, 5 friends.items; // contains item ids 2, 4 coworkers.items; // contains item ids 1, 2, 5 coworkers.remove(2); contactRepo.items; // contains item ids 1, 2, 3, 4, 5 friends.items; // contains item ids 2, 4 coworkers.items; // contains item ids 1, 5 friends.remove(4); contactRepo.items; // contains item ids 1, 2, 3, 5 friends.items; // contains item ids 2 coworkers.items; // contains item ids 1, 5 Notice how coworkers.remove(2) didn't remove id 2 from contactRepo? This is because it was still referenced from friends.items. However, friends.remove(4) causes id 4 to be removed from contactRepo, because no other collection is referring to it. Summary The above is what I want to do. I'm sure there are ways I can do this by keeping track of my own reference counters and such. But if there is a way to do it using javascript's built-in reference management, I'd like to hear about how to use it.

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MVVM - implementing 'IsDirty' functionality to a ModelView in order to save data

- by Brendan

Hi, Being new to WPF & MVVM I struggling with some basic functionality. Let me first explain what I am after, and then attach some example code... I have a screen showing a list of users, and I display the details of the selected user on the right-hand side with editable textboxes. I then have a Save button which is DataBound, but I would only like this button to display when data has actually changed. ie - I need to check for "dirty data". I have a fully MVVM example in which I have a Model called User: namespace Test.Model { class User { public string UserName { get; set; } public string Surname { get; set; } public string Firstname { get; set; } } } Then, the ViewModel looks like this: using System.Collections.ObjectModel; using System.Collections.Specialized; using System.Windows.Input; using Test.Model; namespace Test.ViewModel { class UserViewModel : ViewModelBase { //Private variables private ObservableCollection<User> _users; RelayCommand _userSave; //Properties public ObservableCollection<User> User { get { if (_users == null) { _users = new ObservableCollection<User>(); //I assume I need this Handler, but I am stuggling to implement it successfully //_users.CollectionChanged += HandleChange; //Populate with users _users.Add(new User {UserName = "Bob", Firstname="Bob", Surname="Smith"}); _users.Add(new User {UserName = "Smob", Firstname="John", Surname="Davy"}); } return _users; } } //Not sure what to do with this?!?! //private void HandleChange(object sender, NotifyCollectionChangedEventArgs e) //{ // if (e.Action == NotifyCollectionChangedAction.Remove) // { // foreach (TestViewModel item in e.NewItems) // { // //Removed items // } // } // else if (e.Action == NotifyCollectionChangedAction.Add) // { // foreach (TestViewModel item in e.NewItems) // { // //Added items // } // } //} //Commands public ICommand UserSave { get { if (_userSave == null) { _userSave = new RelayCommand(param => this.UserSaveExecute(), param => this.UserSaveCanExecute); } return _userSave; } } void UserSaveExecute() { //Here I will call my DataAccess to actually save the data } bool UserSaveCanExecute { get { //This is where I would like to know whether the currently selected item has been edited and is thus "dirty" return false; } } //constructor public UserViewModel() { } } } The "RelayCommand" is just a simple wrapper class, as is the "ViewModelBase". (I'll attach the latter though just for clarity) using System; using System.ComponentModel; namespace Test.ViewModel { public abstract class ViewModelBase : INotifyPropertyChanged, IDisposable { protected ViewModelBase() { } public event PropertyChangedEventHandler PropertyChanged; protected virtual void OnPropertyChanged(string propertyName) { PropertyChangedEventHandler handler = this.PropertyChanged; if (handler != null) { var e = new PropertyChangedEventArgs(propertyName); handler(this, e); } } public void Dispose() { this.OnDispose(); } protected virtual void OnDispose() { } } } Finally - the XAML <Window x:Class="Test.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:vm="clr-namespace:Test.ViewModel" Title="MainWindow" Height="350" Width="525"> <Window.DataContext> <vm:UserViewModel/> </Window.DataContext> <Grid> <ListBox Height="238" HorizontalAlignment="Left" Margin="12,12,0,0" Name="listBox1" VerticalAlignment="Top" Width="197" ItemsSource="{Binding Path=User}" IsSynchronizedWithCurrentItem="True"> <ListBox.ItemTemplate> <DataTemplate> <StackPanel> <TextBlock Text="{Binding Path=Firstname}"/> <TextBlock Text="{Binding Path=Surname}"/> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> </ListBox> <Label Content="Username" Height="28" HorizontalAlignment="Left" Margin="232,16,0,0" Name="label1" VerticalAlignment="Top" /> <TextBox Height="23" HorizontalAlignment="Left" Margin="323,21,0,0" Name="textBox1" VerticalAlignment="Top" Width="120" Text="{Binding Path=User/UserName}" /> <Label Content="Surname" Height="28" HorizontalAlignment="Left" Margin="232,50,0,0" Name="label2" VerticalAlignment="Top" /> <TextBox Height="23" HorizontalAlignment="Left" Margin="323,52,0,0" Name="textBox2" VerticalAlignment="Top" Width="120" Text="{Binding Path=User/Surname}" /> <Label Content="Firstname" Height="28" HorizontalAlignment="Left" Margin="232,84,0,0" Name="label3" VerticalAlignment="Top" /> <TextBox Height="23" HorizontalAlignment="Left" Margin="323,86,0,0" Name="textBox3" VerticalAlignment="Top" Width="120" Text="{Binding Path=User/Firstname}" /> <Button Content="Button" Height="23" HorizontalAlignment="Left" Margin="368,159,0,0" Name="button1" VerticalAlignment="Top" Width="75" Command="{Binding Path=UserSave}" /> </Grid> </Window> So basically, when I edit a surname, the Save button should be enabled; and if I undo my edit - well then it should be Disabled again as nothing has changed. I have seen this in many examples, but have not yet found out how to do it. Any help would be much appreciated! Brendan

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actionlistener not responding in java calculator

- by tokee

hi, please see calculator interface code below, from my beginners point of view the "1" should display when it's pressed but evidently i'm doing something wrong. any suggestiosn please? import java.awt.*; import javax.swing.*; import javax.swing.border.*; import java.awt.event.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; /** *A Class that operates as the framework for a calculator. *No calculations are performed in this section */ public class CalcFrame extends JPanel { private CalcEngine calc; private JFrame frame; private JTextField display; private JLabel status; /** * Constructor for objects of class GridLayoutExample */ //public CalcFrame(CalcEngine engine) //{ //frame.setVisible(true); // calc = engine; // makeFrame(); //} public CalcFrame() { makeFrame(); calc = new CalcEngine(); } class ButtonListener implements ActionListener { ButtonListener() { } public void actionPerformed(ActionEvent e) { if (e.getActionCommand().equals("1")) { System.out.println("1"); } } } /** * This allows you to quit the calculator. */ // Alows the class to quit. private void quit() { System.exit(0); } // Calls the dialog frame with the information about the project. private void showAbout() { JOptionPane.showMessageDialog(frame, "Declan Hodge and Tony O'Keefe Group Project", "About Calculator Group Project", JOptionPane.INFORMATION_MESSAGE); } // ---- swing stuff to build the frame and all its components ---- /** * The following creates a layout of the calculator frame. */ private void makeFrame() { frame = new JFrame("Group Project Calculator"); makeMenuBar(frame); JPanel contentPane = (JPanel)frame.getContentPane(); contentPane.setLayout(new BorderLayout(8, 8)); contentPane.setBorder(new EmptyBorder( 10, 10, 10, 10)); /** * Insert a text field */ display = new JTextField(8); contentPane.add(display, BorderLayout.NORTH); //Container contentPane = frame.getContentPane(); contentPane.setLayout(new GridLayout(4, 5)); JPanel buttonPanel = new JPanel(new GridLayout(4, 4)); contentPane.add(new JButton("9")); contentPane.add(new JButton("8")); contentPane.add(new JButton("7")); contentPane.add(new JButton("6")); contentPane.add(new JButton("5")); contentPane.add(new JButton("4")); contentPane.add(new JButton("3")); contentPane.add(new JButton("2")); contentPane.add(new JButton("1")); contentPane.add(new JButton("0")); contentPane.add(new JButton("+")); contentPane.add(new JButton("-")); contentPane.add(new JButton("/")); contentPane.add(new JButton("*")); contentPane.add(new JButton("=")); contentPane.add(new JButton("C")); contentPane.add(new JButton("CE")); contentPane.add(new JButton("%")); contentPane.add(new JButton("#")); //contentPane.add(buttonPanel, BorderLayout.CENTER); frame.pack(); frame.setVisible(true); } /** * Create the main frame's menu bar. * The frame that the menu bar should be added to. */ private void makeMenuBar(JFrame frame) { final int SHORTCUT_MASK = Toolkit.getDefaultToolkit().getMenuShortcutKeyMask(); JMenuBar menubar = new JMenuBar(); frame.setJMenuBar(menubar); JMenu menu; JMenuItem item; // create the File menu menu = new JMenu("File"); menubar.add(menu); // create the Quit menu with a shortcut "Q" key. item = new JMenuItem("Quit"); item.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Q, SHORTCUT_MASK)); item.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { quit(); } }); menu.add(item); // Adds an about menu. menu = new JMenu("About"); menubar.add(menu); // Displays item = new JMenuItem("Calculator Project"); item.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { showAbout(); } }); menu.add(item); } }

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C#: Inheritance, Overriding, and Hiding

- by Rosarch

I'm having difficulty with an architectural decision for my C# XNA game. The basic entity in the world, such as a tree, zombie, or the player, is represented as a GameObject. Each GameObject is composed of at least a GameObjectController, GameObjectModel, and GameObjectView. These three are enough for simple entities, like inanimate trees or rocks. However, as I try to keep the functionality as factored out as possible, the inheritance begins to feel unwieldy. Syntactically, I'm not even sure how best to accomplish my goals. Here is the GameObjectController: public class GameObjectController { protected GameObjectModel model; protected GameObjectView view; public GameObjectController(GameObjectManager gameObjectManager) { this.gameObjectManager = gameObjectManager; model = new GameObjectModel(this); view = new GameObjectView(this); } public GameObjectManager GameObjectManager { get { return gameObjectManager; } } public virtual GameObjectView View { get { return view; } } public virtual GameObjectModel Model { get { return model; } } public virtual void Update(long tick) { } } I want to specify that each subclass of GameObjectController will have accessible at least a GameObjectView and GameObjectModel. If subclasses are fine using those classes, but perhaps are overriding for a more sophisticated Update() method, I don't want them to have to duplicate the code to produce those dependencies. So, the GameObjectController constructor sets those objects up. However, some objects do want to override the model and view. This is where the trouble comes in. Some objects need to fight, so they are CombatantGameObjects: public class CombatantGameObject : GameObjectController { protected new readonly CombatantGameModel model; public new virtual CombatantGameModel Model { get { return model; } } protected readonly CombatEngine combatEngine; public CombatantGameObject(GameObjectManager gameObjectManager, CombatEngine combatEngine) : base(gameObjectManager) { model = new CombatantGameModel(this); this.combatEngine = combatEngine; } public override void Update(long tick) { if (model.Health <= 0) { gameObjectManager.RemoveFromWorld(this); } base.Update(tick); } } Still pretty simple. Is my use of new to hide instance variables correct? Note that I'm assigning CombatantObjectController.model here, even though GameObjectController.Model was already set. And, combatants don't need any special view functionality, so they leave GameObjectController.View alone. Then I get down to the PlayerController, at which a bug is found. public class PlayerController : CombatantGameObject { private readonly IInputReader inputReader; private new readonly PlayerModel model; public new PlayerModel Model { get { return model; } } private float lastInventoryIndexAt; private float lastThrowAt; public PlayerController(GameObjectManager gameObjectManager, IInputReader inputReader, CombatEngine combatEngine) : base(gameObjectManager, combatEngine) { this.inputReader = inputReader; model = new PlayerModel(this); Model.Health = Constants.PLAYER_HEALTH; } public override void Update(long tick) { if (Model.Health <= 0) { gameObjectManager.RemoveFromWorld(this); for (int i = 0; i < 10; i++) { Debug.WriteLine("YOU DEAD SON!!!"); } return; } UpdateFromInput(tick); // .... } } The first time that this line is executed, I get a null reference exception: model.Body.ApplyImpulse(movementImpulse, model.Position); model.Position looks at model.Body, which is null. This is a function that initializes GameObjects before they are deployed into the world: public void Initialize(GameObjectController controller, IDictionary<string, string> data, WorldState worldState) { controller.View.read(data); controller.View.createSpriteAnimations(data, _assets); controller.Model.read(data); SetUpPhysics(controller, worldState, controller.Model.BoundingCircleRadius, Single.Parse(data["x"]), Single.Parse(data["y"]), bool.Parse(data["isBullet"])); } Every object is passed as a GameObjectController. Does that mean that if the object is really a PlayerController, controller.Model will refer to the base's GameObjectModel and not the PlayerController's overriden PlayerObjectModel? In response to rh: This means that now for a PlayerModel p, p.Model is not equivalent to ((CombatantGameObject)p).Model, and also not equivalent to ((GameObjectController)p).Model. That is exactly what I do not want. I want: PlayerController p; p.Model == ((CombatantGameObject)p).Model p.Model == ((GameObjectController)p).Model How can I do this? override?

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Choosing a scripting language for game and implementing it

- by Radius

Hello, I am currently developing a 3D Action/RPG game in C++, and I would like some advice in choosing a scripting language to program the AI of the game. My team comes from a modding background, and in fact we are still finishing work on a mod of the game Gothic. In that game (which we also got our inspiration from) the language DAEDALUS (created by Piranha Bytes, the makers of the game) is used. Here is a full description of said language. The main thing to notice about this is that it uses instances moreso than classes. The game engine is closed, and so one can only guess about the internal implementation of this language, but the main thing I am looking for in a scripting language (which ideally would be quite similar but preferably also more powerful than DAEDALUS) is the fact that there are de facto 3 'separations' of classes - ie classes, instances and (instances of instances?). I think it will be easier to understand what I want if I provide an example. Take a regular NPC. First of all you have a class defined which (I understand) mirrors the (class or structure) inside the engine: CLASS C_NPC { VAR INT id ; // absolute ID des NPCs VAR STRING name [5] ; // Namen des NPC VAR STRING slot ; VAR INT npcType ; VAR INT flags ; VAR INT attribute [ATR_INDEX_MAX] ; VAR INT protection [PROT_INDEX_MAX]; VAR INT damage [DAM_INDEX_MAX] ; VAR INT damagetype ; VAR INT guild,level ; VAR FUNC mission [MAX_MISSIONS] ; var INT fight_tactic ; VAR INT weapon ; VAR INT voice ; VAR INT voicePitch ; VAR INT bodymass ; VAR FUNC daily_routine ; // Tagesablauf VAR FUNC start_aistate ; // Zustandsgesteuert // ********************** // Spawn // ********************** VAR STRING spawnPoint ; // Beim Tod, wo respawnen ? VAR INT spawnDelay ; // Mit Delay in (Echtzeit)-Sekunden // ********************** // SENSES // ********************** VAR INT senses ; // Sinne VAR INT senses_range ; // Reichweite der Sinne in cm // ********************** // Feel free to use // ********************** VAR INT aivar [50] ; VAR STRING wp ; // ********************** // Experience dependant // ********************** VAR INT exp ; // EXerience Points VAR INT exp_next ; // EXerience Points needed to advance to next level VAR INT lp ; // Learn Points }; Then, you can also define prototypes (which set some default values). But how you actually define an NPC is like this: instance BAU_900_Ricelord (Npc_Default) //Inherit from prototype Npc_Default { //-------- primary data -------- name = "Ryzowy Ksiaze"; npctype = NPCTYPE_GUARD; guild = GIL_BAU; level = 10; voice = 12; id = 900; //-------- abilities -------- attribute[ATR_STRENGTH] = 50; attribute[ATR_DEXTERITY] = 10; attribute[ATR_MANA_MAX] = 0; attribute[ATR_MANA] = 0; attribute[ATR_HITPOINTS_MAX]= 170; attribute[ATR_HITPOINTS] = 170; //-------- visuals -------- // animations Mdl_SetVisual (self,"HUMANS.MDS"); Mdl_ApplyOverlayMds (self,"Humans_Arrogance.mds"); Mdl_ApplyOverlayMds (self,"HUMANS_DZIDA.MDS"); // body mesh ,bdytex,skin,head mesh ,headtex,teethtex,ruestung Mdl_SetVisualBody (self,"Hum_Body_CookSmith",1,1,"Hum_Head_FatBald",91 , 0,-1); B_Scale (self); Mdl_SetModelFatness(self,2); fight_tactic = FAI_HUMAN_STRONG; //-------- Talente -------- Npc_SetTalentSkill (self,NPC_TALENT_1H,1); //-------- inventory -------- CreateInvItems (self, ItFoRice,10); CreateInvItem (self, ItFoWine); CreateInvItems(self, ItMiNugget,40); EquipItem (self, Heerscherstab); EquipItem (self, MOD_AMULETTDESREISLORDS); CreateInvItem (self, ItMi_Alchemy_Moleratlubric_01); //CreateInvItem (self,ItKey_RB_01); EquipItem (self, Ring_des_Lebens); //-------------Daily Routine------------- daily_routine = Rtn_start_900; }; FUNC VOID Rtn_start_900 () { TA_Boss (07,00,20,00,"NC_RICELORD"); TA_SitAround (20,00,24,00,"NC_RICELORD_SIT"); TA_Sleep (24,00,07,00,"NC_RICEBUNKER_10"); }; As you can see, the instance declaration is more like a constructor function, setting values and calling functions from within. This still wouldn't pose THAT much of a problem, if not for one more thing: multiple copies of this instance. For example, you can spawn multiple BAU_900_Ricelord's, and each of them keeps track of its own AI state, hitpoints etc. Now I think the instances are represented as ints (maybe even as the id of the NPC) inside the engine, as whenever (inside the script) you use the expression BAU_900_Ricelord it can be only assigned to an int variable, and most functions that operate on NPCs take that int value. However to directly modify its hitpoints etc you have to do something like var C_NPC npc = GetNPC(Bau_900_Ricelord); npc.attribute[ATR_HITPOINTS] = 10; ie get the actual C_NPC object that represents it. To finally recap - is it possible to get this kind of behaviour in any scripting languages you know of, or am I stuck with having to make my own? Or maybe there is an even better way of representing NPC's and their behaviours that way. The IDEAL language for scripting for me would be C#, as I simply adore that language, but somehow I doubt it is possible or indeed feasible to try and implement a similar kind of behaviour in C#. Many thanks

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Reworking my singly linked list

- by Stradigos

Hello everyone, thanks for taking the time to stop by my question. Below you will find my working SLL, but I want to make more use of C# and, instead of having two classes, SLL and Node, I want to use Node's constructors to do all the work (To where if you pass a string through the node, the constructor will chop it up into char nodes). The problem is, after an a few hours of tinkering, I'm not really getting anywhere... using System; using System.Collections.Generic; using System.Text; using System.IO; namespace PalindromeTester { class Program { static void Main(string[] args) { SLL mySLL = new SLL(); mySLL.add('a'); mySLL.add('b'); mySLL.add('c'); mySLL.add('d'); mySLL.add('e'); mySLL.add('f'); Console.Out.WriteLine("Node count = " + mySLL.count); mySLL.reverse(); mySLL.traverse(); Console.Out.WriteLine("\n The header is: " + mySLL.gethead); Console.In.ReadLine(); } class Node { private char letter; private Node next; public Node() { next = null; } public Node(char c) { this.data = c; } public Node(string s) { } public char data { get { return letter; } set { letter = value; } } public Node nextNode { get { return next; } set { next = value; } } } class SLL { private Node head; private int totalNode; public SLL() { head = null; totalNode = 0; } public void add(char s) { if (head == null) { head = new Node(); head.data = s; } else { Node temp; temp = new Node(); temp.data = s; temp.nextNode = head; head = temp; } totalNode++; } public int count { get { return totalNode; } } public char gethead { get { return head.data; } } public void traverse() { Node temp = head; while(temp != null) { Console.Write(temp.data + " "); temp = temp.nextNode; } } public void reverse() { Node q = null; Node p = this.head; while(p!=null) { Node r=p; p=p.nextNode; r.nextNode=q; q=r; } this.head = q; } } } } Here's what I have so far in trying to work it into Node's constructors: using System; using System.Collections.Generic; using System.Text; using System.IO; namespace PalindromeTester { class Program { static void Main(string[] args) { //Node myList = new Node(); //TextReader tr = new StreamReader("data.txt"); //string line; //while ((line = tr.ReadLine()) != null) //{ // Console.WriteLine(line); //} //tr.Close(); Node myNode = new Node("hello"); Console.Out.WriteLine(myNode.count); myNode.reverse(); myNode.traverse(); // Console.Out.WriteLine(myNode.gethead); Console.In.ReadLine(); } class Node { private char letter; private Node next; private Node head; private int totalNode; public Node() { head = null; totalNode = 0; } public Node(char c) { if (head == null) { head = new Node(); head.data = c; } else { Node temp; temp = new Node(); temp.data = c; temp.nextNode = head; head = temp; } totalNode++; } public Node(string s) { foreach (char x in s) { new Node(x); } } public char data { get { return letter; } set { letter = value; } } public Node nextNode { get { return next; } set { next = value; } } public void reverse() { Node q = null; Node p = this.head; while (p != null) { Node r = p; p = p.nextNode; r.nextNode = q; q = r; } this.head = q; } public void traverse() { Node temp = head; while (temp != null) { Console.Write(temp.data + " "); temp = temp.nextNode; } } public int count { get { return totalNode; } } } } } Ideally, the only constructors and methods I would be left with are Node(), Node(char c), Node(string s), Node reserve() and I'll be reworking traverse into a ToString overload. Any suggestions?

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Android draw using SurfaceView and Thread

- by Morten Høgseth

I am trying to draw a ball to my screen using 3 classes. I have read a little about this and I found a code snippet that works using the 3 classes on one page, Playing with graphics in Android I altered the code so that I have a ball that is moving and shifts direction when hitting the wall like the picture below (this is using the code in the link). Now I like to separate the classes into 3 different pages for not making everything so crowded, everything is set up the same way. Here are the 3 classes I have. BallActivity.java Ball.java BallThread.java package com.brick.breaker; import android.app.Activity; import android.os.Bundle; import android.view.Window; import android.view.WindowManager; public class BallActivity extends Activity { private Ball ball; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN); ball = new Ball(this); setContentView(ball); } @Override protected void onPause() { // TODO Auto-generated method stub super.onPause(); setContentView(null); ball = null; finish(); } } package com.brick.breaker; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.view.SurfaceHolder; import android.view.SurfaceView; public class Ball extends SurfaceView implements SurfaceHolder.Callback { private BallThread ballThread = null; private Bitmap bitmap; private float x, y; private float vx, vy; public Ball(Context context) { super(context); // TODO Auto-generated constructor stub bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ball); x = 50.0f; y = 50.0f; vx = 10.0f; vy = 10.0f; getHolder().addCallback(this); ballThread = new BallThread(getHolder(), this); } protected void onDraw(Canvas canvas) { update(canvas); canvas.drawBitmap(bitmap, x, y, null); } public void update(Canvas canvas) { checkCollisions(canvas); x += vx; y += vy; } public void checkCollisions(Canvas canvas) { if(x - vx < 0) { vx = Math.abs(vx); } else if(x + vx > canvas.getWidth() - getBitmapWidth()) { vx = -Math.abs(vx); } if(y - vy < 0) { vy = Math.abs(vy); } else if(y + vy > canvas.getHeight() - getBitmapHeight()) { vy = -Math.abs(vy); } } public int getBitmapWidth() { if(bitmap != null) { return bitmap.getWidth(); } else { return 0; } } public int getBitmapHeight() { if(bitmap != null) { return bitmap.getHeight(); } else { return 0; } } public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { // TODO Auto-generated method stub } public void surfaceCreated(SurfaceHolder holder) { // TODO Auto-generated method stub ballThread.setRunnable(true); ballThread.start(); } public void surfaceDestroyed(SurfaceHolder holder) { // TODO Auto-generated method stub boolean retry = true; ballThread.setRunnable(false); while(retry) { try { ballThread.join(); retry = false; } catch(InterruptedException ie) { //Try again and again and again } break; } ballThread = null; } } package com.brick.breaker; import android.graphics.Canvas; import android.view.SurfaceHolder; public class BallThread extends Thread { private SurfaceHolder sh; private Ball ball; private Canvas canvas; private boolean run = false; public BallThread(SurfaceHolder _holder,Ball _ball) { sh = _holder; ball = _ball; } public void setRunnable(boolean _run) { run = _run; } public void run() { while(run) { canvas = null; try { canvas = sh.lockCanvas(null); synchronized(sh) { ball.onDraw(canvas); } } finally { if(canvas != null) { sh.unlockCanvasAndPost(canvas); } } } } public Canvas getCanvas() { if(canvas != null) { return canvas; } else { return null; } } } Here is a picture that shows the outcome of these classes. I've tried to figure this out but since I am pretty new to Android development I thought I could ask for help. Does any one know what is causing the ball to be draw like that? The code is pretty much the same as the one in the link and I have tried to experiment to find a solution but no luck. Thx in advance for any help=)

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problem in displaying list using array adapters

- by Rahul Varma

Hi, I am trying to display the list of songs using array adapters. But the problem is i couldnt display the list and only empty screen with preset background is showing up. Here's the code...All the thee are seperate classes... Plz help me... public class SongsAdapter extends ArrayAdapter<SongsList>{ private Context context; TextView tvTitle; TextView tvMovie; TextView tvSinger; String s; public SongsAdapter(Context context, int resource, int textViewResourceId, String title) { super(context, resource, textViewResourceId); this.context=context; } public View getView(int position, View convertView, ViewGroup parent) { final int i=position; List<SongsList> listSongs = new ArrayList<SongsList>(); String title = listSongs.get(i).gettitleName().toString(); String album = listSongs.get(i).getmovieName().toString(); String artist = listSongs.get(i).getsingerName().toString(); String imgal = listSongs.get(i).gettitleName().toString(); LayoutInflater inflater = ((Activity) context).getLayoutInflater(); View v = inflater.inflate(R.layout.row, null); tvTitle=(TextView)v.findViewById(R.id.text2); tvMovie=(TextView)v.findViewById(R.id.text3); tvSinger=(TextView)v.findViewById(R.id.text1); tvTitle.setText(title); tvMovie.setText(album); tvSinger.setText(artist); final ImageView im=(ImageView)v.findViewById(R.id.image); s="http://www.gorinka.com/"+imgal; String imgPath=s; AsyncImageLoaderv asyncImageLoaderv=new AsyncImageLoaderv(); Bitmap cachedImage = asyncImageLoaderv.loadDrawable(imgPath, new AsyncImageLoaderv.ImageCallback() { public void imageLoaded(Bitmap imageDrawable, String imageUrl) { im.setImageBitmap(imageDrawable); } }); im.setImageBitmap(cachedImage); return v; } public class imageloader implements Runnable{ private String ss; private ImageView im; public imageloader(String s, ImageView im) { this.ss=s; this.im=im; Thread thread = new Thread(this); thread.start(); } public void run(){ try { HttpGet httpRequest = null; httpRequest = new HttpGet(ss); HttpClient httpclient = new DefaultHttpClient(); HttpResponse response = (HttpResponse) httpclient.execute(httpRequest); HttpEntity entity = response.getEntity(); BufferedHttpEntity bufHttpEntity = new BufferedHttpEntity(entity); InputStream is = bufHttpEntity.getContent(); Bitmap bm = BitmapFactory.decodeStream(is); Log.d("img","img"); is.close(); im.setImageBitmap(bm); } catch (Exception t) { Log.e("bitmap url", "Exception in updateStatus()", t); } } } } public class SongsList { private String titleName; private String movieName; private String singerName; private String imagePath; private String mediaPath; // Constructor for the SongsList class public SongsList(String titleName, String movieName, String singerName,String imagePath,String mediaPath ) { super(); this.titleName = titleName; this.movieName = movieName; this.singerName = singerName; this.imagePath = imagePath; this.mediaPath = mediaPath; } public String gettitleName() { return titleName; } public void settitleName(String titleName) { this.titleName = titleName; } public String getmovieName() { return movieName; } public void setmovieName(String movieName) { this.movieName = movieName; } public String getsingerName() { return singerName; } public void setsingerName(String singerName) { this.singerName = singerName; } public String getimagePath() { return imagePath; } public void setimagePath(String imagePath) { this.imagePath = imagePath; } public String getmediaPath() { return mediaPath; } public void setmediaPath(String mediaPath) { this.mediaPath = mediaPath; } } public class MusicListActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.openadiuofile); ListView list = (ListView)findViewById(R.id.list1); SongsAdapter adapter = new SongsAdapter(this,R.layout.row, R.id.text2, null); list.setAdapter(adapter); } }

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How to determine errors in java

- by user225269

I'm just a java beginner. Do you have any tips there on how to determine errors. I'm trying to connect to mysql derby database. I don't know how to determine the error, there is no red line, but there is a message box that shows up when I try to run the program. All I want to do is to display the first record in the database. All I get is this in the output: E:\Users\users.netbeans\6.8\var\cache\executor-snippets\run.xml:45: package Employees; import java.sql.Statement; import javax.swing.JOptionPane; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; import java.sql.ResultSet; /** * * @author Nrew */ public class Students extends javax.swing.JFrame { Connection con; Statement stmt; ResultSet rs; /** Creates new form Students */ public Students() { initComponents(); DoConnect(); } public void DoConnect(){ try { String host= "jdbc:derby://localhost:1527/YURA"; String uname = "bart"; String pword = "12345"; con = DriverManager.getConnection(host, uname, pword); stmt = con.createStatement( ); String SQL = "SELECT * FROM APP.XROSS"; rs = stmt.executeQuery(SQL); rs.next(); rs.next( ); int ids = rs.getInt("IDNUM"); String idz = Integer.toString(ids); String fname = rs.getString("FNAME"); String lname = rs.getString("LNAME"); String course = rs.getString("COURSE"); String skul = rs.getString("SCHOOL"); String gen = rs.getString("GENDER"); TextIDNUM.setText(idz); TextFNAME.setText(fname); TextLNAME.setText(lname); textCOURSE.setText(course); textSCHOOL.setText(skul); textGENDER.setText(gen); } catch (SQLException err) { JOptionPane.showMessageDialog(Students.this, err.getMessage()); } } /** This method is called from within the constructor to * initialize the form. * WARNING: Do NOT modify this code. The content of this method is * always regenerated by the Form Editor. */ @SuppressWarnings("unchecked") // <editor-fold defaultstate="collapsed" desc="Generated Code"> private void initComponents() { TextIDNUM = new javax.swing.JTextField(); TextFNAME = new javax.swing.JTextField(); TextLNAME = new javax.swing.JTextField(); textCOURSE = new javax.swing.JTextField(); textSCHOOL = new javax.swing.JTextField(); textGENDER = new javax.swing.JTextField(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(116, 116, 116) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false) .addComponent(textGENDER, javax.swing.GroupLayout.Alignment.LEADING) .addComponent(textSCHOOL, javax.swing.GroupLayout.Alignment.LEADING) .addComponent(textCOURSE, javax.swing.GroupLayout.Alignment.LEADING) .addComponent(TextLNAME, javax.swing.GroupLayout.Alignment.LEADING) .addComponent(TextFNAME, javax.swing.GroupLayout.Alignment.LEADING) .addComponent(TextIDNUM, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 151, Short.MAX_VALUE)) .addContainerGap(243, Short.MAX_VALUE)) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(37, 37, 37) .addComponent(TextIDNUM, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(18, 18, 18) .addComponent(TextFNAME, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(18, 18, 18) .addComponent(TextLNAME, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(18, 18, 18) .addComponent(textCOURSE, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) .addComponent(textSCHOOL, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) .addComponent(textGENDER, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addContainerGap(67, Short.MAX_VALUE)) ); pack(); }// </editor-fold> /** * @param args the command line arguments */ public static void main(String args[]) { java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new Students().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JTextField TextFNAME; private javax.swing.JTextField TextIDNUM; private javax.swing.JTextField TextLNAME; private javax.swing.JTextField textCOURSE; private javax.swing.JTextField textGENDER; private javax.swing.JTextField textSCHOOL; // End of variables declaration }

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Add child to scene from within a class.

- by Fecal Brunch

Hi, I'm new to flash in general and have been writing a program with two classes that extend MovieClip (Stems and Star). I need to create a new Stems object as a child of the scene when the user stops dragging a Star object, but do not know how to reference the scene from within the Star class's code. I've tried passing the scene into the constructor of the Star and doing sometihng like: this.scene.addChild (new Stems ()); But apparently that's not how to do it... Below is the code for Stems and Stars, any advice would be appreciated greatly. package { import flash.display.MovieClip; import flash.events.*; import flash.utils.Timer; public class Stems extends MovieClip { public const centreX=1026/2; public const centreY=600/2; public var isFlowing:Boolean; public var flowerType:Number; public const outerLimit=210; public const innerLimit=100; public function Stems(fType:Number) { this.isFlowing=false; this.scaleX=this.scaleY= .0007* distanceFromCentre(this.x, this.y); this.setXY(); trace(distanceFromCentre(this.x, this.y)); if (fType==2) { gotoAndStop("Aplant"); } } public function distanceFromCentre(X:Number, Y:Number):int { return (Math.sqrt((X-centreX)*(X-centreX)+(Y-centreY)*(Y-centreY))); } public function rotateAwayFromCentre():void { var theX:int=centreX-this.x; var theY:int = (centreY - this.y) * -1; var angle = Math.atan(theY/theX)/(Math.PI/180); if (theX<0) { angle+=180; } if (theX>=0&&theY<0) { angle+=360; } this.rotation = ((angle*-1) + 90)+180; } public function setXY() { do { var tempX=Math.random()*centreX*2; var tempY=Math.random()*centreY*2; } while (distanceFromCentre (tempX, tempY)>this.outerLimit || distanceFromCentre (tempX, tempY)<this.innerLimit); this.x=tempX; this.y=tempY; rotateAwayFromCentre(); } public function getFlowerType():Number { return this.flowerType; } } } package { import flash.display.MovieClip; import flash.events.*; import flash.utils.Timer; public class Star extends MovieClip { public const sWide=1026; public const sTall=600; public var startingX:Number; public var startingY:Number; public var starColor:Number; public var flicker:Timer; public var canUpdatePos:Boolean=true; public const innerLimit=280; public function Star(color:Number, basefl:Number, factorial:Number) { this.setXY(); this.starColor=color; this.flicker = new Timer (basefl + factorial * (Math.ceil(100* Math.random ()))); this.flicker.addEventListener(TimerEvent.TIMER, this.tick); this.addEventListener(MouseEvent.MOUSE_OVER, this.hover); this.addEventListener(MouseEvent.MOUSE_UP, this.drop); this.addEventListener(MouseEvent.MOUSE_DOWN, this.drag); this.addChild (new Stems (2)); this.flicker.start(); this.updateAnimation(0, false); } public function distanceOK(X:Number, Y:Number):Boolean { if (Math.sqrt((X-(sWide/2))*(X-(sWide/2))+(Y-(sTall/2))*(Y-(sTall/2)))>innerLimit) { return true; } else { return false; } } public function setXY() { do { var tempX=this.x=Math.random()*sWide; var tempY=this.y=Math.random()*sTall; } while (distanceOK (tempX, tempY)==false); this.startingX=tempX; this.startingY=tempY; } public function tick(event:TimerEvent) { if (this.canUpdatePos) { this.setXY(); } this.updateAnimation(0, false); this.updateAnimation(this.starColor, false); } public function updateAnimation(color:Number, bright:Boolean) { var brightStr:String; if (bright) { brightStr="bright"; } else { brightStr="low"; } switch (color) { case 0 : this.gotoAndStop("none"); break; case 1 : this.gotoAndStop("N" + brightStr); break; case 2 : this.gotoAndStop("A" + brightStr); break; case 3 : this.gotoAndStop("F" + brightStr); break; case 4 : this.gotoAndStop("E" + brightStr); break; case 5 : this.gotoAndStop("S" + brightStr); break; } } public function hover(event:MouseEvent):void { this.updateAnimation(this.starColor, true); this.canUpdatePos=false; } public function drop(event:MouseEvent):void { this.stopDrag(); this.x=this.startingX; this.y=this.startingY; this.updateAnimation(0, false); this.canUpdatePos=true; } public function drag(event:MouseEvent):void { this.startDrag(false); this.canUpdatePos=false; } } }

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friendship and operator overloading help

- by sil3nt

hello there, I have the following class #ifndef Container_H #define Container_H #include <iostream> using namespace std; class Container{ friend bool operator==(const Container &rhs,const Container &lhs); public: void display(ostream & out) const; private: int sizeC; // size of Container int capacityC; // capacity of dynamic array int * elements; // pntr to dynamic array }; ostream & operator<< (ostream & out, const Container & aCont); #endif and this source file #include "container.h" /*----------------------------********************************************* note: to test whether capacityC and sizeC are equal, must i add 1 to sizeC? seeing as sizeC starts off with 0?? */ Container::Container(int maxCapacity){ capacityC = maxCapacity; elements = new int [capacityC]; sizeC = 0; } Container::~Container(){ delete [] elements; } Container::Container(const Container & origCont){ //copy constructor? int i = 0; for (i = 0; i<capacityC; i++){ //capacity to be used here? (*this).elements[i] = origCont.elements[i]; } } bool Container::empty() const{ if (sizeC == 0){ return true; }else{ return false; } } void Container::insert(int item, int index){ if ( sizeC == capacityC ){ cout << "\n*** Next: Bye!\n"; return; // ? have return here? } if ( (index >= 0) && (index <= capacityC) ){ elements[index] = item; sizeC++; } if ( (index < 0) && (index > capacityC) ){ cout<<"*** Illegal location to insert--"<< index << ". Container unchanged. ***\n"; }//error here not valid? according to original a3? have i implemented wrong? } void Container::erase(int index){ if ( (index >= 0) && (index <= capacityC) ){ //correct here? legal location? int i = 0; while (i<capacityC){ //correct? elements[index] = elements[index+1]; //check if index increases here. i++; } sizeC=sizeC-1; //correct? updated sizeC? }else{ cout<<"*** Illegal location to be removed--"<< index << ". Container unchanged. ***\n"; } } int Container::size()const{ return sizeC; //correct? } /* bool Container::operator==(const Container &rhs,const Container &lhs){ int equal = 0, i = 0; for (i = 0; i < capacityC ; i++){ if ( rhs.elements[i] == lhs.elements[i] ){ equal++; } } if (equal == sizeC){ return true; }else{ return false; } } ostream & operator<< (ostream & out, const Container & aCont){ int i = 0; for (i = 0; i<sizeC; i++){ out<< aCont.elements[i] << " " << endl; } } */ I dont have the other functions in the header file (just a quikie). Anyways, the last two functions in "/* */" I cant get to work, what am I doing wrong here? the first function is to see whether the two arrays are equal to one another

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Repopulating a collection of Backbone forms with previously submitted data

- by Brian Wheat

I am able to post my forms to my database and I have stepped through my back end function to check and see that my Get function is returning the same data I submitted. However I am having trouble understanding how to have this data rendered upon visiting the page again. What am I missing? The intention is to be able to create, read, update, or delete (CRUD) some personal contact data for a variable collection of individuals. //Model var PersonItem = Backbone.Model.extend({ url: "/Application/PersonList", idAttribute: "PersonId", schema: { Title: { type: 'Select', options: function (callback) { $.getJSON("/Application/GetTitles/").done(callback); } }, Salutation: { type: 'Select', options: ['Mr.', 'Mrs.', 'Ms.', 'Dr.'] }, FirstName: 'Text', LastName: 'Text', MiddleName: 'Text', NameSuffix: 'Text', StreetAddress: 'Text', City: 'Text', State: { type: 'Select', options: function (callback) { $.getJSON("/Application/GetStates/").done(callback); } }, ZipCode: 'Text', PhoneNumber: 'Text', DateOfBirth: 'Date', } }); Backbone.Form.setTemplates(template, PersonItem); //Collection var PersonList = Backbone.Collection.extend({ model: PersonItem , url: "/Application/PersonList" }); //Views var PersonItemView = Backbone.Form.extend({ tagName: "li", events: { 'click button.delete': 'remove', 'change input': 'change' }, initialize: function (options) { console.log("ItemView init"); PersonItemView.__super__.initialize.call(this, options); _.bindAll(this, 'render', 'remove'); console.log("ItemView set attr = " + options); }, render: function () { PersonItemView.__super__.render.call(this); $('fieldset', this.el).append("<button class=\"delete\" style=\"float: right;\">Delete</button>"); return this; }, change: function (event) { var target = event.target; console.log('changing ' + target.id + ' from: ' + target.defaultValue + ' to: ' + target.value); }, remove: function () { console.log("delete button pressed"); this.model.destroy({ success: function () { alert('person deleted successfully'); } }); return false; } }); var PersonListView = Backbone.View.extend({ el: $("#application_fieldset"), events: { 'click button#add': 'addPerson', 'click button#save': 'save2db' }, initialize: function () { console.log("PersonListView Constructor"); _.bindAll(this, 'render', 'addPerson', 'appendItem', 'save'); this.collection = new PersonList(); this.collection.bind('add', this.appendItem); //this.collection.fetch(); this.collection.add([new PersonItem()]); console.log("collection length = " + this.collection.length); }, render: function () { var self = this; console.log(this.collection.models); $(this.el).append("<button id='add'>Add Person</button>"); $(this.el).append("<button id='save'>Save</button>"); $(this.el).append("<fieldset><legend>Contact</legend><ul id=\"anchor_list\"></ul>"); _(this.collection.models).each(function (item) { self.appendItem(item); }, this); $(this.el).append("</fieldset>"); }, addPerson: function () { console.log("addPerson clicked"); var item = new PersonItem(); this.collection.add(item); }, appendItem: function (item) { var itemView = new PersonItemView({ model: item }); $('#anchor_list', this.el).append(itemView.render().el); }, save2db: function () { var self = this; console.log("PersonListView save"); _(this.collection.models).each(function (item) { console.log("item = " + item.toJSON()); var cid = item.cid; console.log("item.set"); item.set({ Title: $('#' + cid + '_Title').val(), Salutation: $('#' + cid + '_Salutation').val(), FirstName: $('#' + cid + '_FirstName').val(), LastName: $('#' + cid + '_LastName').val(), MiddleName: $('#' + cid + '_MiddleName').val(), NameSuffix: $('#' + cid + '_NameSuffix').val(), StreetAddress: $('#' + cid + '_StreetAddress').val(), City: $('#' + cid + '_City').val(), State: $('#' + cid + '_State').val(), ZipCode: $('#' + cid + '_ZipCode').val(), PhoneNumber: $('#' + cid + '_PhoneNumber').val(), DateOfBirth: $('#' + cid + '_DateOfBirth').find('input').val() }); if (item.isNew()) { console.log("item.isNew"); self.collection.create(item); } else { console.log("!item.isNew"); item.save(); } }); return false; } }); var personList = new PersonList(); var view = new PersonListView({ collection: personList }); personList.fetch({ success: function () { $("#application_fieldset").append(view.render()); } });

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sqlite no such table

- by Graham B

can anyone please help. I've seen many people with the same problem and looked at all suggestions but still cannot get this to work. I have tried to unistall the application and install again, I have tried to change the version number and start again. I've debugged the code and it does go into the onCreate function, but when I go to make a select query it says the users table does not exist. Any help would greatly be appreciated. Thanks guys DatabaseHandler Class public class DatabaseHandler extends SQLiteOpenHelper { // Variables protected static final int DATABASE_VERSION = 1; protected static final String DATABASE_NAME = "MyUser.db"; // Constructor public DatabaseHandler(Context context) { super(context, DATABASE_NAME, null, DATABASE_VERSION); } // Creating Tables @Override public void onCreate(SQLiteDatabase db) { // Create the Users table // NOTE: I have the column variables saved above String CREATE_USERS_TABLE = "CREATE TABLE IF NOT EXISTS Users(" + KEY_PRIMARY_ID + " " + INTEGER + " " + PRIMARY_KEY + " " + AUTO_INCREMENT + " " + NOT_NULL + "," + USERS_KEY_EMAIL + " " + NVARCHAR+"(1000)" + " " + UNIQUE + " " + NOT_NULL + "," + USERS_KEY_PIN + " " + NVARCHAR+"(10)" + " " + NOT_NULL + ")"; db.execSQL(CREATE_USERS_TABLE); } // Upgrading database @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { db.execSQL("DROP TABLE IF EXISTS Users"); onCreate(db); } UserDataSource class public class UserDataSource { private SQLiteDatabase db; private DatabaseHandler dbHandler; public UserDataSource(Context context) { dbHandler = new DatabaseHandler(context); } public void OpenWriteable() throws SQLException { db = dbHandler.getWritableDatabase(); } public void Close() { dbHandler.close(); } // Validate the user login with the username and password provided public void ValidateLogin(String username, String pin) throws CustomException { Cursor cursor = db.rawQuery( "select * from Users where " + DatabaseHandler.USERS_KEY_EMAIL + " = '" + username + "'" + " and " + DatabaseHandler.USERS_KEY_PIN + " = '" + pin + "'" , null); ........ } Then in the activity class, I'm calling UserDataSource uds = new UserDataSource (this); uds.OpenWriteable(); uds.ValidateLogin("name", "pin"); Any help would be great, thanks very much Graham The following is the attached log from the error report 11-23 17:47:46.414: I/SqliteDatabaseCpp(26717): sqlite returned: error code = 1, msg = no such table: Users, db=/data/data/prometric.myitemwriter/databases/MyUser.db 11-23 17:47:57.085: D/AndroidRuntime(26717): Shutting down VM 11-23 17:47:57.085: W/dalvikvm(26717): threadid=1: thread exiting with uncaught exception (group=0x40bec1f8) 11-23 17:47:57.171: D/dalvikvm(26717): GC_CONCURRENT freed 575K, 8% free 8649K/9351K, paused 2ms+6ms 11-23 17:47:57.179: E/AndroidRuntime(26717): FATAL EXCEPTION: main 11-23 17:47:57.179: E/AndroidRuntime(26717): java.lang.IllegalStateException: Could not execute method of the activity 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.view.View$1.onClick(View.java:3091) 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.view.View.performClick(View.java:3558) 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.view.View$PerformClick.run(View.java:14152) 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.os.Handler.handleCallback(Handler.java:605) 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.os.Handler.dispatchMessage(Handler.java:92) 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.os.Looper.loop(Looper.java:137) 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.app.ActivityThread.main(ActivityThread.java:4514) 11-23 17:47:57.179: E/AndroidRuntime(26717): at java.lang.reflect.Method.invokeNative(Native Method) 11-23 17:47:57.179: E/AndroidRuntime(26717): at java.lang.reflect.Method.invoke(Method.java:511) 11-23 17:47:57.179: E/AndroidRuntime(26717): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790) 11-23 17:47:57.179: E/AndroidRuntime(26717): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557) 11-23 17:47:57.179: E/AndroidRuntime(26717): at dalvik.system.NativeStart.main(Native Method) 11-23 17:47:57.179: E/AndroidRuntime(26717): Caused by: java.lang.reflect.InvocationTargetException 11-23 17:47:57.179: E/AndroidRuntime(26717): at java.lang.reflect.Method.invokeNative(Native Method) 11-23 17:47:57.179: E/AndroidRuntime(26717): at java.lang.reflect.Method.invoke(Method.java:511) 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.view.View$1.onClick(View.java:3086) 11-23 17:47:57.179: E/AndroidRuntime(26717): ... 11 more 11-23 17:47:57.179: E/AndroidRuntime(26717): Caused by: android.database.sqlite.SQLiteException: no such table: Users: , while compiling: select * from Users where email = '' and pin = '' 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method) 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:68) 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.database.sqlite.SQLiteProgram.compileSql(SQLiteProgram.java:143) 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.database.sqlite.SQLiteProgram.compileAndbindAllArgs(SQLiteProgram.java:361) 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:127) 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:94) 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:53) 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:47) 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1685) 11-23 17:47:57.179: E/AndroidRuntime(26717): at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1659) 11-23 17:47:57.179: E/AndroidRuntime(26717): at projectname.database.UserDataSource.ValidateLogin(UserDataSource.java:73) 11-23 17:47:57.179: E/AndroidRuntime(26717): at projectname.LoginActivity.btn_login_Click(LoginActivity.java:47) 11-23 17:47:57.179: E/AndroidRuntime(26717): ... 14 more

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Will creating a background thread in a WCF service during a call, take up a thread in the ASP .NET t

- by Nate Pinchot

The following code is part of a WCF service. Will eventWatcher take up a thread in the ASP .NET thread pool, even if it is set IsBackground = true? /// <summary> /// Provides methods to work with the PhoneSystem web services SDK. /// This is a singleton since we need to keep track of what lines (extensions) are open. /// </summary> public sealed class PhoneSystemWebServiceFactory : IDisposable { // singleton instance reference private static readonly PhoneSystemWebServiceFactory instance = new PhoneSystemWebServiceFactory(); private static readonly object l = new object(); private static volatile Hashtable monitoredExtensions = new Hashtable(); private static readonly PhoneSystemWebServiceClient webServiceClient = CreateWebServiceClient(); private static volatile bool isClientRegistered; private static volatile string clientHandle; private static readonly Thread eventWatcherThread = new Thread(EventPoller) {IsBackground = true}; #region Constructor // these constructors are hacks to make the C# compiler not mark beforefieldinit // more info: http://www.yoda.arachsys.com/csharp/singleton.html static PhoneSystemWebServiceFactory() { } PhoneSystemWebServiceFactory() { } #endregion #region Properties /// <summary> /// Gets a thread safe instance of PhoneSystemWebServiceFactory /// </summary> public static PhoneSystemWebServiceFactory Instance { get { return instance; } } #endregion #region Private methods /// <summary> /// Create and configure a PhoneSystemWebServiceClient with basic http binding and endpoint from app settings. /// </summary> /// <returns>PhoneSystemWebServiceClient</returns> private static PhoneSystemWebServiceClient CreateWebServiceClient() { string url = ConfigurationManager.AppSettings["PhoneSystemWebService_Url"]; if (string.IsNullOrEmpty(url)) { throw new ConfigurationErrorsException( "The AppSetting \"PhoneSystemWebService_Url\" could not be found. Check the application configuration and ensure that the element exists. Example: <appSettings><add key=\"PhoneSystemWebService_Url\" value=\"http://xyz\" /></appSettings>"); } return new PhoneSystemWebServiceClient(new BasicHttpBinding(), new EndpointAddress(url)); } #endregion #region Event poller public static void EventPoller() { while (true) { if (Thread.CurrentThread.ThreadState == ThreadState.Aborted || Thread.CurrentThread.ThreadState == ThreadState.AbortRequested || Thread.CurrentThread.ThreadState == ThreadState.Stopped || Thread.CurrentThread.ThreadState == ThreadState.StopRequested) break; // get events //webServiceClient.GetEvents(clientHandle, 30, 100); } Thread.Sleep(5000); } #endregion #region Client registration methods private static void RegisterClientIfNeeded() { if (isClientRegistered) { return; } lock (l) { // double lock check if (isClientRegistered) { return; } //clientHandle = webServiceClient.RegisterClient("PhoneSystemWebServiceFactoryInternal", null); isClientRegistered = true; } } private static void UnregisterClient() { if (!isClientRegistered) { return; } lock (l) { // double lock check if (!isClientRegistered) { return; } //webServiceClient.UnegisterClient(clientHandle); } } #endregion #region Phone extension methods public bool SubscribeToEventsForExtension(string extension) { if (monitoredExtensions.Contains(extension)) { return false; } lock (monitoredExtensions.SyncRoot) { // double lock check if (monitoredExtensions.Contains(extension)) { return false; } RegisterClientIfNeeded(); // open line so we receive events for extension LineInfo lineInfo; try { //lineInfo = webServiceClient.OpenLine(clientHandle, extension); } catch (FaultException<PhoneSystemWebSDKErrorDetail>) { // TODO: log error return false; } // add extension to list of monitored extensions //monitoredExtensions.Add(extension, lineInfo.lineID); monitoredExtensions.Add(extension, 1); // start event poller thread if not already started if (eventWatcherThread.ThreadState == ThreadState.Stopped || eventWatcherThread.ThreadState == ThreadState.Unstarted) { eventWatcherThread.Start(); } return true; } } public bool UnsubscribeFromEventsForExtension(string extension) { if (!monitoredExtensions.Contains(extension)) { return false; } lock (monitoredExtensions.SyncRoot) { if (!monitoredExtensions.Contains(extension)) { return false; } // close line try { //webServiceClient.CloseLine(clientHandle, (int) monitoredExtensions[extension]); } catch (FaultException<PhoneSystemWebSDKErrorDetail>) { // TODO: log error return false; } // remove extension from list of monitored extensions monitoredExtensions.Remove(extension); // if we are not monitoring anything else, stop the poller and unregister the client if (monitoredExtensions.Count == 0) { eventWatcherThread.Abort(); UnregisterClient(); } return true; } } public bool IsExtensionMonitored(string extension) { lock (monitoredExtensions.SyncRoot) { return monitoredExtensions.Contains(extension); } } #endregion #region Dispose public void Dispose() { lock (l) { // close any open lines var extensions = monitoredExtensions.Keys.Cast<string>().ToList(); while (extensions.Count > 0) { UnsubscribeFromEventsForExtension(extensions[0]); extensions.RemoveAt(0); } if (!isClientRegistered) { return; } // unregister web service client UnregisterClient(); } } #endregion }

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Pass a Delphi class to a C++ function/method that expects a class with __thiscall methods.

- by Alan G.

I have some MSVC++ compiled DLL's for which I have created COM-like (lite) interfaces (abstract Delphi classes). Some of those classes have methods that need pointers to objects. These C++ methods are declared with the __thiscall calling convention (which I cannot change), which is just like __stdcall, except a this pointer is passed on the ECX register. I create the class instance in Delphi, then pass it on to the C++ method. I can set breakpoints in Delphi and see it hitting the exposed __stdcall methods in my Delphi class, but soon I get a STATUS_STACK_BUFFER_OVERRUN and the app has to exit. Is it possible to emulate/deal with __thiscall on the Delphi side of things? If I pass an object instantiated by the C++ system then all is good, and that object's methods are called (as would be expected), but this is useless - I need to pass Delphi objects. Edit 2010-04-19 18:12 This is what happens in more detail: The first method called (setLabel) exits with no error (though its a stub method). The second method called (init), enters then dies when it attempts to read the vol parameter. C++ Side #define SHAPES_EXPORT __declspec(dllexport) // just to show the value class SHAPES_EXPORT CBox { public: virtual ~CBox() {} virtual void init(double volume) = 0; virtual void grow(double amount) = 0; virtual void shrink(double amount) = 0; virtual void setID(int ID = 0) = 0; virtual void setLabel(const char* text) = 0; }; Delphi Side IBox = class public procedure destroyBox; virtual; stdcall; abstract; procedure init(vol: Double); virtual; stdcall; abstract; procedure grow(amount: Double); virtual; stdcall; abstract; procedure shrink(amount: Double); virtual; stdcall; abstract; procedure setID(val: Integer); virtual; stdcall; abstract; procedure setLabel(text: PChar); virtual; stdcall; abstract; end; TMyBox = class(IBox) protected FVolume: Double; FID: Integer; FLabel: String; // public constructor Create; destructor Destroy; override; // BEGIN Virtual Method implementation procedure destroyBox; override; stdcall; // empty - Dont need/want C++ to manage my Delphi objects, just call their methods procedure init(vol: Double); override; stdcall; // FVolume := vol; procedure grow(amount: Double); override; stdcall; // Inc(FVolume, amount); procedure shrink(amount: Double); override; stdcall; // Dec(FVolume, amount); procedure setID(val: Integer); override; stdcall; // FID := val; procedure setLabel(text: PChar); override; stdcall; // Stub method; empty. // END Virtual Method implementation property Volume: Double read FVolume; property ID: Integer read FID; property Label: String read FLabel; end; I would have half expected using stdcall alone to work, but something is messing up, not sure what, perhaps something to do with the ECX register being used? Help would be greatly appreciated. Edit 2010-04-19 17:42 Could it be that the ECX register needs to be preserved on entry and restored once the function exits? Is the this pointer required by C++? I'm probably just reaching at the moment based on some intense Google searches. I found something related, but it seems to be dealing with the reverse of this issue.

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How do I prevent my form from freezing when it is loading an image from the web at the click of a button?

- by Vimal Basdeo

I want to display an image from the web to a panel in another Jframe at the click of a button but whenever I click the button first the image loads and during this time the current form potentially freezes and once the image has loaded the form is displayed with the image.. How can I avoid the situation where my form freezes since it is very irritating My codes :: My current class private void btn_TrackbusActionPerformed(java.awt.event.ActionEvent evt) { try { sendMessage("Query,map,$,start,211,Arsenal,!"); System.out.println(receiveMessage()); } catch (UnknownHostException ex) { Logger.getLogger(client_Trackbus.class.getName()).log(Level.SEVERE, null, ex); } catch (IOException ex) { Logger.getLogger(client_Trackbus.class.getName()).log(Level.SEVERE, null, ex); } catch (Exception ex) { Logger.getLogger(client_Trackbus.class.getName()).log(Level.SEVERE, null, ex); } client_trackedbus nextform=new client_trackedbus(planform,connection,packet_receive,packet_send); this.setVisible(false); this.dispose(); nextform.setVisible(true); // TODO add your handling code here: } My next class that displays the image public class client_trackedbus extends javax.swing.JFrame { client_planform planform=null; DatagramSocket connection=null; DatagramPacket packet_receive=null; DatagramPacket packet_send=null; JLabel label=null; /** Creates new form client_trackedbus */ public client_trackedbus(client_planform planform,DatagramSocket connection,DatagramPacket packet_receive,DatagramPacket packet_send) { initComponents(); this.planform=planform; this.connection=connection; this.packet_receive=packet_receive; this.packet_send=packet_send; try { displayMap("http://www.huddletogether.com/projects/lightbox2/images/image-2.jpg", jPanel1, new JLabel()); } catch (MalformedURLException ex) { Logger.getLogger(client_trackedbus.class.getName()).log(Level.SEVERE, null, ex); } } private void displayMap(String url,JPanel panel,JLabel label) throws MalformedURLException{ URL imageurl=new URL(url); Image image=(Toolkit.getDefaultToolkit().createImage(imageurl)); ImageIcon icon = new ImageIcon(image); label.setIcon(icon); panel.add(label); // System.out.println(panel.getSize().width); this.getContentPane().add(panel); } /** This method is called from within the constructor to * initialize the form. * WARNING: Do NOT modify this code. The content of this method is * always regenerated by the Form Editor. */ @SuppressWarnings("unchecked") // <editor-fold defaultstate="collapsed" desc="Generated Code"> private void initComponents() { jPanel1 = new javax.swing.JPanel(); jLabel1 = new javax.swing.JLabel(); btn_Exit = new javax.swing.JButton(); btn_Plan = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); setTitle("Public Transport Journey Planner"); javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1); jPanel1.setLayout(jPanel1Layout); jPanel1Layout.setHorizontalGroup( jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGap(0, 368, Short.MAX_VALUE) ); jPanel1Layout.setVerticalGroup( jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGap(0, 172, Short.MAX_VALUE) ); jLabel1.setFont(new java.awt.Font("Arial", 1, 18)); jLabel1.setText("Your tracked bus"); btn_Exit.setText("Exit"); btn_Exit.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { btn_ExitActionPerformed(evt); } }); btn_Plan.setText("Plan journey"); btn_Plan.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { btn_PlanActionPerformed(evt); } }); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(104, 104, 104) .addComponent(jLabel1)) .addGroup(layout.createSequentialGroup() .addContainerGap() .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGroup(layout.createSequentialGroup() .addGap(65, 65, 65) .addComponent(btn_Plan) .addGap(65, 65, 65) .addComponent(btn_Exit, javax.swing.GroupLayout.PREFERRED_SIZE, 87, javax.swing.GroupLayout.PREFERRED_SIZE))) .addContainerGap(20, Short.MAX_VALUE)) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(35, 35, 35) .addComponent(jLabel1) .addGap(18, 18, 18) .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(18, 18, 18) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(btn_Exit) .addComponent(btn_Plan)) .addContainerGap(12, Short.MAX_VALUE)) ); pack(); }// </editor-fold> private void btn_ExitActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: Exitform(); } private void btn_PlanActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: this.setVisible(false); this.dispose(); this.planform.setVisible(true); } private void Exitform(){ this.setVisible(false); this.dispose(); } /** * @param args the command line arguments */ public static void main(String args[]) { java.awt.EventQueue.invokeLater(new Runnable() { public void run() { // new client_trackedbus().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JButton btn_Exit; private javax.swing.JButton btn_Plan; private javax.swing.JLabel jLabel1; private javax.swing.JPanel jPanel1; // End of variables declaration }

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google link for the RGBA library?

- by Navruk

I want google link for the RGBA library <script type='text/javascript' src='jquery.color-RGBa-patch.js'></script> This file contains /* * jQuery Color Animations */ (function(jQuery){ // We override the animation for all of these color styles jQuery.each(['backgroundColor', 'borderBottomColor', 'borderLeftColor', 'borderRightColor', 'borderTopColor', 'color', 'outlineColor'], function(i,attr){ jQuery.fx.step[attr] = function(fx){ if ( fx.colorFunction == undefined || fx.state == 0 ) { fx.start = getColor( fx.elem, attr ); fx.end = getRGB( fx.end ); if ( fx.start == undefined ) { fx.start = [ 255,255,255,0 ]; } else { if ( fx.start[3] == undefined ) // if alpha channel is not spotted fx.start[3] = 1; // assume it is fully opaque if ( fx.start[3] == 0 ) // if alpha is present and fully transparent fx.start[0] = fx.start[1] = fx.start[2] = 255; // assume starting with white } if ( fx.end[3] == undefined ) // if alpha channel is not spotted fx.end[3] = 1; // assume it is fully opaque fx.colorFunction = ( fx.start[3] == 1 && fx.end[3] == 1 ? calcRGB : calcRGBa ); } fx.elem.style[attr] = fx.colorFunction(); } }); var calcRGB = function() { return 'rgb(' + Math.max(Math.min( parseInt((this.pos * (this.end[0] - this.start[0])) + this.start[0]), 255), 0) + ',' + Math.max(Math.min( parseInt((this.pos * (this.end[1] - this.start[1])) + this.start[1]), 255), 0) + ',' + Math.max(Math.min( parseInt((this.pos * (this.end[2] - this.start[2])) + this.start[2]), 255), 0) + ')'; }; var calcRGBa = function() { return 'rgba(' + Math.max(Math.min( parseInt((this.pos * (this.end[0] - this.start[0])) + this.start[0]), 255), 0) + ',' + Math.max(Math.min( parseInt((this.pos * (this.end[1] - this.start[1])) + this.start[1]), 255), 0) + ',' + Math.max(Math.min( parseInt((this.pos * (this.end[2] - this.start[2])) + this.start[2]), 255), 0) + ',' + Math.max(Math.min( parseFloat((this.pos * (this.end[3] - this.start[3])) + this.start[3]), 1), 0) + ')'; }; // Color Conversion functions from highlightFade // By Blair Mitchelmore // http://jquery.offput.ca/highlightFade/ // Parse strings looking for color tuples [255,255,255] function getRGB(color) { var result; // Check if we're already dealing with an array of colors if ( color && color.constructor == Array && color.length >= 3 ) return color; // Look for rgb(num,num,num) if (result = /rgba?$\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,?\s*((?:[0-9](?:\.[0-9]+)?)?)\s*$/.exec(color)) return [ parseInt(result[1]), parseInt(result[2]), parseInt(result[3]), parseFloat(result[4]||1) ]; // Look for rgb(num%,num%,num%) if (result = /rgba?$\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,?\s*((?:[0-9](?:\.[0-9]+)?)?)\s*$/.exec(color)) return [parseFloat(result[1])*2.55, parseFloat(result[2])*2.55, parseFloat(result[3])*2.55, parseFloat(result[4]||1)]; // Look for #a0b1c2 if (result = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(color)) return [parseInt(result[1],16), parseInt(result[2],16), parseInt(result[3],16)]; // Look for #fff if (result = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(color)) return [parseInt(result[1]+result[1],16), parseInt(result[2]+result[2],16), parseInt(result[3]+result[3],16)]; // Otherwise, we're most likely dealing with a named color var colorName = jQuery.trim(color).toLowerCase(); if ( colors[colorName] != undefined ) return colors[colorName]; return [ 255, 255, 255, 0 ]; } function getColor(elem, attr) { var color; do { color = jQuery.curCSS(elem, attr); // Keep going until we find an element that has color, or we hit the body if ( color != '' && color != 'transparent' || jQuery.nodeName(elem, "body") ) break; attr = "backgroundColor"; } while ( elem = elem.parentNode ); return getRGB(color); }; // Some named colors to work with // From Interface by Stefan Petre // http://interface.eyecon.ro/ var colors = { aqua:[0,255,255], azure:[240,255,255], beige:[245,245,220], black:[0,0,0], blue:[0,0,255], brown:[165,42,42], cyan:[0,255,255], darkblue:[0,0,139], darkcyan:[0,139,139], darkgrey:[169,169,169], darkgreen:[0,100,0], darkkhaki:[189,183,107], darkmagenta:[139,0,139], darkolivegreen:[85,107,47], darkorange:[255,140,0], darkorchid:[153,50,204], darkred:[139,0,0], darksalmon:[233,150,122], darkviolet:[148,0,211], fuchsia:[255,0,255], gold:[255,215,0], green:[0,128,0], indigo:[75,0,130], khaki:[240,230,140], lightblue:[173,216,230], lightcyan:[224,255,255], lightgreen:[144,238,144], lightgrey:[211,211,211], lightpink:[255,182,193], lightyellow:[255,255,224], lime:[0,255,0], magenta:[255,0,255], maroon:[128,0,0], navy:[0,0,128], olive:[128,128,0], orange:[255,165,0], pink:[255,192,203], purple:[128,0,128], violet:[128,0,128], red:[255,0,0], silver:[192,192,192], white:[255,255,255], yellow:[255,255,0] }; })(jQuery);

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How do I remove the time from printpreview dialog?

- by Albo Best

Here is my code: Imports System.Data.OleDb Imports System.Drawing.Printing Namespace Print Public Class Form1 Inherits System.Windows.Forms.Form Dim PrintC As PrinterClass Dim conn As OleDb.OleDbConnection Dim connectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=..\\db1.mdb" Dim sql As String = String.Empty Dim ds As DataSet Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load FillDataGrid() '//create printerclass object PrintC = New PrinterClass(PrintDocument1, dataGrid) End Sub Private Sub FillDataGrid() Try Dim dt As New DataTable Dim ds As New DataSet ds.Tables.Add(dt) Dim da As New OleDbDataAdapter con.Open() da = New OleDbDataAdapter("SELECT * from klient ", con) da.Fill(dt) con.Close() dataGrid.DataSource = dt.DefaultView Dim dTable As DataTable For Each dTable In ds.Tables Dim dgStyle As DataGridTableStyle = New DataGridTableStyle dgStyle.MappingName = dTable.TableName dataGrid.TableStyles.Add(dgStyle) Next ' DataGrid settings dataGrid.CaptionText = "TE GJITHE KLIENTET" dataGrid.HeaderFont = New Font("Verdana", 12) dataGrid.TableStyles(0).GridColumnStyles(0).Width = 60 dataGrid.TableStyles(0).GridColumnStyles(1).Width = 140 dataGrid.TableStyles(0).GridColumnStyles(2).Width = 140 dataGrid.TableStyles(0).GridColumnStyles(3).Width = 140 dataGrid.TableStyles(0).GridColumnStyles(4).Width = 140 dataGrid.TableStyles(0).GridColumnStyles(5).HeaderText = "" dataGrid.TableStyles(0).GridColumnStyles(5).Width = -1 Catch ex As Exception MessageBox.Show(ex.Message) End Try End Sub Private Sub btnPrint_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnPrint.Click 'create printerclass object PrintC = New PrinterClass(PrintDocument1, dataGrid) PrintDocument1.Print() End Sub Private Sub btnPreview_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnPreview.Click 'create printerclass object PrintC = New PrinterClass(PrintDocument1, dataGrid) ''preview Dim ps As New PaperSize("A4", 840, 1150) ps.PaperName = PaperKind.A4 PrintDocument1.DefaultPageSettings.PaperSize = ps PrintPreviewDialog1.WindowState = FormWindowState.Normal PrintPreviewDialog1.StartPosition = FormStartPosition.CenterScreen PrintPreviewDialog1.ClientSize = New Size(600, 600) PrintPreviewDialog1.ShowDialog() End Sub Private Sub PrintDocument1_PrintPage(ByVal sender As System.Object, ByVal e As System.Drawing.Printing.PrintPageEventArgs) Handles PrintDocument1.PrintPage 'print grid Dim morepages As Boolean = PrintC.Print(e.Graphics) If (morepages) Then e.HasMorePages = True End If End Sub End Class End Namespace This is how data looks in DataGrid (that's perfect)... and here is how it looks when I click PrintPreview. (I don't want the time to appear there, the "12:00:00" part. in database the date is stored as Short Date (10-Dec-12) Can somebody suggest a way around that? Imports System Imports System.Windows.Forms Imports System.Drawing Imports System.Drawing.Printing Imports System.Collections Imports System.Data Namespace Print Public Class PrinterClass '//clone of Datagrid Dim PrintGrid As Grid '//printdocument for initial printer settings Private PrintDoc As PrintDocument '//defines whether the grid is ordered right to left Private bRightToLeft As Boolean '//Current Top Private CurrentY As Single = 0 '//Current Left Private CurrentX As Single = 0 '//CurrentRow to print Private CurrentRow As Integer = 0 '//Page Counter Public PageCounter As Integer = 0 '/// <summary> '/// Constructor Class '/// </summary> '/// <param name="pdocument"></param> '/// <param name="dgrid"></param> Public Sub New(ByVal pdocument As PrintDocument, ByVal dgrid As DataGrid) 'MyBase.new() PrintGrid = New Grid(dgrid) PrintDoc = pdocument '//The grid columns are right to left bRightToLeft = dgrid.RightToLeft = RightToLeft.Yes '//init CurrentX and CurrentY CurrentY = pdocument.DefaultPageSettings.Margins.Top CurrentX = pdocument.DefaultPageSettings.Margins.Left End Sub Public Function Print(ByVal g As Graphics, ByRef currentX As Single, ByRef currentY As Single) As Boolean '//use predefined area currentX = currentX currentY = currentY PrintHeaders(g) Dim Morepages As Boolean = PrintDataGrid(g) currentY = currentY currentX = currentX Return Morepages End Function Public Function Print(ByVal g As Graphics) As Boolean CurrentX = PrintDoc.DefaultPageSettings.Margins.Left CurrentY = PrintDoc.DefaultPageSettings.Margins.Top PrintHeaders(g) Return PrintDataGrid(g) End Function '/// <summary> '/// Print the Grid Headers '/// </summary> '/// <param name="g"></param> Private Sub PrintHeaders(ByVal g As Graphics) Dim sf As StringFormat = New StringFormat '//if we want to print the grid right to left If (bRightToLeft) Then CurrentX = PrintDoc.DefaultPageSettings.PaperSize.Width - PrintDoc.DefaultPageSettings.Margins.Right sf.FormatFlags = StringFormatFlags.DirectionRightToLeft Else CurrentX = PrintDoc.DefaultPageSettings.Margins.Left End If Dim i As Integer For i = 0 To PrintGrid.Columns - 1 '//set header alignment Select Case (CType(PrintGrid.Headers.GetValue(i), Header).Alignment) Case HorizontalAlignment.Left 'left sf.Alignment = StringAlignment.Near Case HorizontalAlignment.Center sf.Alignment = StringAlignment.Center Case HorizontalAlignment.Right sf.Alignment = StringAlignment.Far End Select '//advance X according to order If (bRightToLeft) Then '//draw the cell bounds (lines) and back color g.FillRectangle(New SolidBrush(PrintGrid.HeaderBackColor), CurrentX - PrintGrid.Headers(i).Width, CurrentY, PrintGrid.Headers(i).Width, PrintGrid.Headers(i).Height) g.DrawRectangle(New Pen(PrintGrid.LineColor), CurrentX - PrintGrid.Headers(i).Width, CurrentY, PrintGrid.Headers(i).Width, PrintGrid.Headers(i).Height) '//draw the cell text g.DrawString(PrintGrid.Headers(i).CText, PrintGrid.Headers(i).Font, New SolidBrush(PrintGrid.HeaderForeColor), New RectangleF(CurrentX - PrintGrid.Headers(i).Width, CurrentY, PrintGrid.Headers(i).Width, PrintGrid.Headers(i).Height), sf) '//next cell CurrentX -= PrintGrid.Headers(i).Width Else '//draw the cell bounds (lines) and back color g.FillRectangle(New SolidBrush(PrintGrid.HeaderBackColor), CurrentX, CurrentY, PrintGrid.Headers(i).Width, PrintGrid.Headers(i).Height) g.DrawRectangle(New Pen(PrintGrid.LineColor), CurrentX, CurrentY, PrintGrid.Headers(i).Width, PrintGrid.Headers(i).Height) '//draw the cell text g.DrawString(PrintGrid.Headers(i).CText, PrintGrid.Headers(i).Font, New SolidBrush(PrintGrid.HeaderForeColor), New RectangleF(CurrentX, CurrentY, PrintGrid.Headers(i).Width, PrintGrid.Headers(i).Height), sf) '//next cell CurrentX += PrintGrid.Headers(i).Width End If Next '//reset to beginning If (bRightToLeft) Then '//right align CurrentX = PrintDoc.DefaultPageSettings.PaperSize.Width - PrintDoc.DefaultPageSettings.Margins.Right Else '//left align CurrentX = PrintDoc.DefaultPageSettings.Margins.Left End If '//advance to next row CurrentY = CurrentY + CType(PrintGrid.Headers.GetValue(0), Header).Height End Sub Private Function PrintDataGrid(ByVal g As Graphics) As Boolean Dim sf As StringFormat = New StringFormat PageCounter = PageCounter + 1 '//if we want to print the grid right to left If (bRightToLeft) Then CurrentX = PrintDoc.DefaultPageSettings.PaperSize.Width - PrintDoc.DefaultPageSettings.Margins.Right sf.FormatFlags = StringFormatFlags.DirectionRightToLeft Else CurrentX = PrintDoc.DefaultPageSettings.Margins.Left End If Dim i As Integer For i = CurrentRow To PrintGrid.Rows - 1 Dim j As Integer For j = 0 To PrintGrid.Columns - 1 '//set cell alignment Select Case (PrintGrid.Cell(i, j).Alignment) '//left Case HorizontalAlignment.Left sf.Alignment = StringAlignment.Near Case HorizontalAlignment.Center sf.Alignment = StringAlignment.Center '//right Case HorizontalAlignment.Right sf.Alignment = StringAlignment.Far End Select '//advance X according to order If (bRightToLeft) Then '//draw the cell bounds (lines) and back color g.FillRectangle(New SolidBrush(PrintGrid.BackColor), CurrentX - PrintGrid.Cell(i, j).Width, CurrentY, PrintGrid.Cell(i, j).Width, PrintGrid.Cell(i, j).Height) g.DrawRectangle(New Pen(PrintGrid.LineColor), CurrentX - PrintGrid.Cell(i, j).Width, CurrentY, PrintGrid.Cell(i, j).Width, PrintGrid.Cell(i, j).Height) '//draw the cell text g.DrawString(PrintGrid.Cell(i, j).CText, PrintGrid.Cell(i, j).Font, New SolidBrush(PrintGrid.ForeColor), New RectangleF(CurrentX - PrintGrid.Cell(i, j).Width, CurrentY, PrintGrid.Cell(i, j).Width, PrintGrid.Cell(i, j).Height), sf) '//next cell CurrentX -= PrintGrid.Cell(i, j).Width Else '//draw the cell bounds (lines) and back color g.FillRectangle(New SolidBrush(PrintGrid.BackColor), CurrentX, CurrentY, PrintGrid.Cell(i, j).Width, PrintGrid.Cell(i, j).Height) g.DrawRectangle(New Pen(PrintGrid.LineColor), CurrentX, CurrentY, PrintGrid.Cell(i, j).Width, PrintGrid.Cell(i, j).Height) '//draw the cell text '//Draw text by alignment g.DrawString(PrintGrid.Cell(i, j).CText, PrintGrid.Cell(i, j).Font, New SolidBrush(PrintGrid.ForeColor), New RectangleF(CurrentX, CurrentY, PrintGrid.Cell(i, j).Width, PrintGrid.Cell(i, j).Height), sf) '//next cell CurrentX += PrintGrid.Cell(i, j).Width End If Next '//reset to beginning If (bRightToLeft) Then '//right align CurrentX = PrintDoc.DefaultPageSettings.PaperSize.Width - PrintDoc.DefaultPageSettings.Margins.Right Else '//left align CurrentX = PrintDoc.DefaultPageSettings.Margins.Left End If '//advance to next row CurrentY += PrintGrid.Cell(i, 0).Height CurrentRow += 1 '//if we are beyond the page margin (bottom) then we need another page, '//return true If (CurrentY > PrintDoc.DefaultPageSettings.PaperSize.Height - PrintDoc.DefaultPageSettings.Margins.Bottom) Then Return True End If Next Return False End Function End Class End Namespace

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