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Between a jsf page and a managed bean, why the getter method is called twice

- by Bariscan

Hi, I have a jsf page with a form has an outputtext in it. The value of outputtext component is called from a backing bean (or managed bean). I know when I code it as #{MyBean.myString} Jsf rename it and calls getMyString() method. However the wierd thing is, when I put a breakpoint to the getter method of this component, I see it is called twice during the page is being rendered. The outputtext is in a h:form, and it is the only component wich is bind to a backingbean. I mean, it is so wierd that jsf should get the value when it first come to the getter method, however it needs to go to the getter method twice. Can you explain what is the reason of this behaviour in jsf? Any help would be appreciated, Best wishes, Baris

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UTF-8 BOM in php response to mootools xmlhttprequest

- by Jimmy

Hi, I'm writing my first little AJAX-enabled Joomla component. I'm using mootools. I got a xmlhttprequest to contact my Joomla component, and the component returns a response - just plain text echoed by php, like echo 'Hello World!'; It's all working fine, except wireshark tells me that the response is prepended with \357\273\277\357\273\277 when it gets read by the javascript on the client side. This shows up as a little square before the response in an alert box that the script shows. I don't explicitly set the encoding on the xmlhttprequest; mootools docs say that it defaults to UTF8. What's the right way to handle this? Should I be setting the encoding on the request? Mime type? Should the javascript get rid of it? I'm not planning to have any characters requiring UTF8 in the response, so using plain old ascii would be ok for me too. Thanks

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How to change the cursor type

- by Jessy

This question is related to the previous post. http://stackoverflow.com/questions/2532936/how-to-save-file-and-read How can I change the cursor to "Hand" only when the mouse pointed on grid which is not Null (contained images)? So far the cursor turn to "Hand" all over the grids (null or not null). public GUI() { .... JPanel pDraw = new JPanel(); .... for(Component component: pDraw.getComponents()){ JLabel lbl = (JLabel)component; //add mouse listener to grid box which contained image if (lbl.getIcon() != null) lbl.addMouseListener(this); } public void mouseEntered(MouseEvent e) { Cursor cursor = Cursor.getDefaultCursor(); //change cursor appearance to HAND_CURSOR when the mouse pointed on images cursor = Cursor.getPredefinedCursor(Cursor.HAND_CURSOR); setCursor(cursor); }

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Flash FLVPlayback states

- by rob5408

I'm writing my own class to manage a skin for an FLVPlayback component. It works 90% of the time, but sometimes the state get really messed up. Specifically, the video is playing, meaning I can see it play and the VideoEvent.PLAYHEAD_UPDATE event is firing, but when I poll the FLVPlayback component about its playing property, it returns false. I assume this may be because 'buffering' is kind of a subset of 'playing', but I cannot confirm this in the documentation. I guess another way to ask this question is, "Does the FLVPlayback component ever buffer while it is in a stopped state?"

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Transparent checkbox with theme-support?

- by Steve

I'm looking for a simple, transparent checkbox component that properly supports XP/Vista/7 theming. It should also work with Delphi 7. I've found a component on Torry's that's not working properly, and I know that Raize components has a transparent checkbox - but I'm obviously not going to pay $300 for the entire package just to get this single component. I've also found many other solutions, but none of them support theming. The main problem is that TCustomCheckBox is a TWinControl descendant, and in order to implement transparency, you need to make a new TGraphic descendant control from ground up. Any ideas?

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Flex ItemRenderer/Editor ComboBox Issue...Puhleezz Help

- by Mohit

Hi EveryOne Beginner in Flex ...Even worse with item renderers... Have managed to add a Combobox to a datagrid using a itemEditor... I want to change the options in a combo box depending on the value selected by the user on a previous combo.. In the combo box i want to display a certain value (Model Name ) but for quering a table i'll pass the corresponding code of the model :(... sounds simple enough ..unfortunately not able to implement it I have found this problem on this site but the solution seems an overkill for my "small" problem..was hoping if anyone could guide me towards a more simpler solution... My xml comes as <item><mstValue>CH1</mstValue><mstRemarks>CARRIER</mstRemarks></item> <item><mstValue>CH2</mstValue><mstRemarks>TRANS</mstRemarks></item> <item><mstValue>CH3</mstValue><mstRemarks>YORK</mstRemarks></item> Now i have been able to show the values in a combo .if user selects CARRIER i want to pass CH1(dont know how to do it with itemeditors)...and then fetch values corresponding to CH1 from a table (second part of the problem)...in the sample below i used this.parentDocument.modelComboChanged(this.selectedItem) to pass the selected value ...instedd i need to pass the code for it which comes from the xml...Pls help this making me go crazy.... <mx:DataGrid id="chillerGrid" dataProvider="{chillerGridDp}" editable="true" itemRollOver="{ComponentUtil.setTooltip(event,this)}" itemRollOut="ComponentUtil.resetTooltip(event)" width="70%" height="160"> <mx:columns> <mx:DataGridColumn id="test" headerText="Model" dataField="model" editorDataField="value" editable="true" backgroundColor="#f4f2bd" width="100" > <mx:itemEditor> <mx:Component> <mx:ComboBox creationComplete="{if(text=='')selectedIndex=0;if(data && data.contactType!=undefined)text=data.contactType.text();}" change="{if(text == ''){selectedIndex=0;if(data && data.contactType!=undefined)text=data.contactType.text();};this.parentDocument.modelComboChanged(this.selectedItem)}" dataProvider="{this.parentDocument.arrColl1}" text="mstRemarks" labelField="mstRemarks" editable = "false" >  </mx:ComboBox>  </mx:Component> </mx:itemEditor> </mx:DataGridColumn> <mx:DataGridColumn headerText="Make" dataField="make" editorDataField="value" editable="true" backgroundColor="#f4f2bd" width="100" > <mx:itemEditor> <mx:Component> <mx:ComboBox creationComplete="{if(text=='')selectedIndex=0;if(data && data.contactType!=undefined)text=data.contactType.text();}" change="{if(text == ''){selectedIndex=0;if(data && data.contactType!=undefined)text=data.contactType.text();} }" labelField="@label" editable = "false" > <mx:dataProvider> <mx:String></mx:String> <mx:String>Carrier</mx:String> <mx:String>York</mx:String> <mx:String>Trane</mx:String> </mx:dataProvider> </mx:ComboBox> </mx:Component> </mx:itemEditor> </mx:DataGridColumn> <mx:DataGridColumn headerText="Chillers" dataField="chillers" width="200" editable="true"> <mx:itemEditor> <mx:Component> <mx:TextInput maxChars="49" /> </mx:Component> </mx:itemEditor> </mx:DataGridColumn> </mx:columns> </mx:DataGrid>

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Opencv: Converting hue image to RGB image

- by jhaip

I am trying to show the hue component of the image from my webcam. I have split apart the image into the hue component but I can't figure out how to show the hue component as the pure colors. For example if one pixel of the image was B=189 G=60 R=60 then in HSV, H=0. I don't want the draw image to be the the gray values of hue but the RGB equivalent of the hue or H=0 - B=0 G=0 R=255 IplImage *image, *imageHSV, *imageHue; image = cvQueryFrame(capture); //image from webcam imageHSV = cvCreateImage( cvGetSize(image), IPL_DEPTH_8U, 3 ); imageHue = cvCreateImage( cvGetSize(image), IPL_DEPTH_8U, 1 ); cvCvtColor( image, imageHSV, CV_BGR2HSV ); cvSplit( imageHSV, imageHue, 0, 0, 0 ); I have a feeling there is a simple solution so any help is appreciated.

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How do I call overloaded Java methods in Clojure.

- by Pat Wallace

For this example Java class: package foo; public class TestInterop { public String test(int i) { return "Test(int)"; } public String test(Object i) { return "Test(Object)"; } } When I start Clojure and try to call the test(int) method, the test(Object) method is called instead, because Clojure automatically boxes the integer into a java.lang.Integer object. How do I force Clojure to call the test(int) method? user=> (.test (new foo.TestInterop) 10) "Test(Object)" I want to call methods like Component.add(Component comp, int index) in AWT, but instead keep calling add(Component comp, Object constraints), so the buttons on my toolbar always appear in the wrong order.

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Accessing the value of a Richfaces calendar during validation.

- by JBristow

I am trying to validate a field based on another field's value. <h:form id="item"> <s:validateAll/> <h:selectBooleanCheckbox id="selected" value="#{bean.selected}" validator="selectedValidator"/> <rich:calendar id="startDate" value="#{bean.startDate}"/> </h:form> However, inside my validator. public void validate(FacesContext context, UIComponent component, Object value) throws ValidatorException { UIInput startComp = (UIInput) context.getViewRoot().findComponent("item:startDate"); if(value != null && value) { // Check value of startComp and throw exception if null or empty. } } The component startComp resolves, but has no value. Where is the value that appears in the text box of the richfaces calendar component?

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JLayeredPane versus Container layering

- by Gili

JLayeredPane allows one to stack multiple Components on top of one another using JLayeredPane.add(Component, Integer). Components in higher "layers" display on top of Components in lower "layers". Container.add(Component, int) provides a similar mechanism whereby Components with lower indexes display on top of Components with higher indexes. Please note that the first mechanism uses Integer and the second mechanism uses int. Also, one renders high values on top of low ones, and the other does the opposite. Do not mix the two :) My question is: what's the point of using JLayeredPane when Container already provides the same mechanism? Does one layer components better than the another? UPDATE: There is also Container.setComponentZOrder(Component, int) to consider.

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Ngram IDF smoothing

- by adi92

I am trying to use IDF scores to find interesting phrases in my pretty huge corpus of documents. I basically need something like Amazon's Statistically Improbable Phrases, i.e. phrases that distinguish a document from all the others The problem that I am running into is that some (3,4)-grams in my data which have super-high idf actually consist of component unigrams and bigrams which have really low idf.. For example, "you've never tried" has a very high idf, while each of the component unigrams have very low idf.. I need to come up with a function that can take in document frequencies of an n-gram and all its component (n-k)-grams and return a more meaningful measure of how much this phrase will distinguish the parent document from the rest. If I were dealing with probabilities, I would try interpolation or backoff models.. I am not sure what assumptions/intuitions those models leverage to perform well, and so how well they would do for IDF scores. Anybody has any better ideas?

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ASP.NET plug-in architecture, settings problem

- by Xaqron

I want to divide business layer (BLL) of an asp.net application into multiple components. Each component is a .NET class library which is compiled as a standalone DLL. These components should have their own configuration files. For example "MyNameSpace.Users.dll" contains classes about users of the website and there's a password policy to check if password length is at least x characters. When webmaster edits the config file of this DLL and set x to y then component (DLL) should use new value (y) in the future and enforce passwords to be at least y characters. I want each component as a single project and compile them separaely (and not to put all projects in a solution in Visual Studio), and put the DLLs of these libraries into the "Bin" folder of my ASP.NET application. Is it possible ? Where should I put these config files ?

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EXT JS toLayout on Viewport doesnt show anything...

- by Nazariy

After reading many example about adding new components in to existing container without reloading whole page I run in to small problem while combining tree and tabs inside Viewport component. What I'm trying to do is to register on click event to tree node and load in to content container new component, depending on node type it can be tabpanel, gridpanel or any other available component. here is short example of tree object: { xtype: 'treepanel', id: 'tree-panel', listeners: { click: function(n) { var content = Ext.getCmp('content-panel'); content.setTitle(n.attributes.qtip); //remove all components from content-panel content.removeAll(); content.add(dummy_tabs2); content.doLayout(); return; } }} All DOM manipulation went fine, everything registered properly, new Title shown, but dummy_tabs2 are not shown. I did try to set various properties for doLayout(true|false, true|false) but nothing happens. Am I doing something wrong?

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GUI system architecture?

- by topright

I'm designing GUI (graphical user interface) system for a game engine (C++). Idea is to create a heirarchy of GUI controllers like Focusable, Hoverable, Dragable etc. Every GUI component can attach multiple controllers, they modify component's behaviour. I think it gives flexible system and protects from code duplication. Different instances of the same GUI class can have different complex behaviours (may be, even change it dynamically), so this approach looks practical. The other choice is to add focused, hovered, dragged etc. flags in the base GUI component class. It looks like overhead and not that flexible. Another solution is to use Decorator pattern and wrap objects with FocusDecorator, HoverDecorator etc. Maintaining such system looks a bit harder. Question: What are pitfalls in my solution? May be you have seen a better approaches in GUI systems? What are the best ways of implementing such flexible complex system?

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Cakephp Localization, Cannot Change language when DEFAULT_LANGUAGE is set

- by ion

I am confused :) I'm using the p18n component in cakephp found here: http://www.palivoda.eu/2008/04/i18n-in-cakephp-12-database-content-translation-part-2/ This component requires me to set in core.php the following constant: define("DEFAULT_LANGUAGE", 'eng') However when this is set I cannot change the language using: Configure::write('Config.language', 'eng'); At the moment, into my knowledge, the only way to change the locale of my static content is the use of the Configure::write. But for the dynamic content to change through the use of the p28n component I must have the DEFINE_LANGUAGE constant set to a value. This is all very confusing. Any help will be much appreciated.

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Why can't I retrieve the entities I've just persisted?

- by felipecao

I've got this web service that basically queries the database and returns all persisted entities. For testing purposes, I've created a TestDataManager that persists 2 example entities after Spring context is loaded (BTW, I'm using JAX-WS, Spring, Hibernate and HSQLDB). My TestDataManager looks like this: @Component public class TestDataManager { @Resource private SessionFactory sf; @PostConstruct @Transactional(readOnly = false, propagation = Propagation.REQUIRES_NEW) public void insertTestData(){ sf.openSession(); sf.openSession().beginTransaction(); sf.openSession().persist(new Site("site one")); sf.openSession().persist(new Site("site two")); sf.openSession().flush(); } } My JAX-WS endpoint looks like this: @WebService public class SmartBrickEndpoint { @Resource private WebServiceContext context; public Set<Site> getSitesForUser(String user){ return getSiteService().findByUser(new User(user)); } private ISiteService getSiteService(){ ServletContext servletContext = (ServletContext) context.getMessageContext().get("javax.xml.ws.servlet.context"); return (ISiteService) BeanRetriever.getBean(servletContext, ISiteService.class); } } This my Service class: @Component @Transactional(readOnly = true) public class SiteService implements ISiteService { @Resource private ISiteDao siteDao; @Override public Set<Site> findByUser(User user) { return siteDao.findByUser(user); } } This is my DAO: @Component @Transactional(readOnly = true) public class SiteDao implements ISiteDao { @Resource private SessionFactory sessionFactory; @Override public Set<Site> findByUser(User user) { Set<Site> sites = new LinkedHashSet<Site>(sessionFactory.getCurrentSession().createCriteria(Site.class).list()); return sites; } } This is my applicationContext.xml: <context:annotation-config /> <context:component-scan base-package="br.unirio.wsimxp.dao"/> <context:component-scan base-package="br.unirio.wsimxp.service"/> <context:component-scan base-package="br.unirio.wsimxp.spring"/> <bean id="applicationDS" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="org.hsqldb.jdbcDriver"/> <property name="url" value="jdbc:hsqldb:file:sites"/> </bean> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <property name="dataSource" ref="applicationDS" /> <property name="configLocation"> <value>classpath:hibernate.cfg.xml</value> </property> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">org.hibernate.dialect.HSQLDialect</prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.format_sql">true</prop> <prop key="hibernate.connection.release_mode">on_close</prop>  <prop key="hibernate.query.factory_class">org.hibernate.hql.classic.ClassicQueryTranslatorFactory</prop> <prop key="hibernate.hbm2ddl.auto">create-drop</prop> </props> </property> </bean> <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory" /> </bean> <tx:annotation-driven transaction-manager="transactionManager" /> This is what's going on now: when the app is deployed, TestDataManager#insertTestData kicks-in (due to @PostConstruct) and persist does not raise any exception. I should have 2 entities in the DB by now. Afterwards, I invoke the endpoint by a SOAP client, and the request goes all the way up to the DAO. The Hibernate invocation does not raise any exception, but the returned list is empty. The odd thing is, in TestDataManager, if I switch from sf.openSession() to sf.getCurrentSession(), I get an error message: "No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here". What I am doing wrong here? Why is the query "not seeing" the persisted entities? Why do I need to invoke sf.openSession() on TestDataManager although it's annotated with @Transactional? I have done some tests with hibernate.current_session_context_class=thread in application.xml, but then I just switch problems in each class. I'd like not needing to manually invoke sf.openSession() and leave that for Hibernate to take care. Thanks a lot for any help!

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Flex 3 - Send a HTTP Get request from Flash and want Firefox to show Open With Box.

- by Kash

Hi all, I am a newb developer as far as Flex and Flash is concerned. This is what I'm trying to do: 1) Send a HTTP request to our server (with a custom made URL). The URL basically tells the server to send data in a CSV format. 2) The server sends a 200 OK response, which has Content-Type: application/csv and the payload is pure CSV data. What I wish to do is, when firefox gets this 200 OK response, I want it to show the standard Open with box (the one that shows up when you download some file). I tried doing this with HTTPService. I have a "Export to CSV" button on the flash component. Upon clicking that, the flash component is able to succesfully send the HTTP request. I however don't want Flash component to handle the response, so I don't have the 's "result" tag defined. But nothing happens. Any suggestions on how to do this.

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Using rendrer in list in flex

- by Anshuman Jaiswal

Hi all I am using list component in flex & using custom itemRenderer i.e I have made a component named frameRenrer(there are two controls ImageControl and label control) where I set the image source and label text on creationComplete event.And I providing the data using dataProvider function in List component.But actually problem is that when I scroll this list only 4 items are displayed repeatedly and to check it I make a function on mouseOver of image control in this I am using Alert.show(data.label); then it shows the correct data but it is not displayed in the list.In data provider I am using ArrayCollection. What is the problem anyone????

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Constant in Hibernate Mapping Files

- by bertolami

I would like to add a value object to a mapped class where one column is fixed depending of the class that contains the component. How can I do something like this? <component name="aComponent"> <property name="abc" column="cde"/> <property name="xyz" value="FIXED"/> </component> Unfortunatly, the value attribute does not exist. Is there another way to apply a constant value to property? Thanks in advance.

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UIPickerView and empty core data array

- by Mark

I have a viewcontroller showing items from a core data entity. I also have a tableview listing records from the same entity. The table is editable, and the user could remove all the records. When this happens, the view controller holding the pickerview bombs because it's looking for records in an empty array. How to prevent this? I'm assuming I need to do something different at objectAtIndex:row... # pragma mark PickerView Section - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView { return 1; // returns the number of columns to display. } - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component { return [profiles count]; // returns the number of rows } - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component { // Display the profiles we've fetched on the picker Profiles *prof = [profiles objectAtIndex:row]; return prof.profilename; } //If the user chooses from the pickerview - (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { selectedProfile = [[profiles objectAtIndex:row]valueForKey:@"profilename"]; }

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t-sql - find differences for pk's in a single table (Self join?)

- by Pace

Hi Experts, My situation is this. I have a table of products with a pk "Parent" which has "Components" The data looks something like this Parent(PK) Component Car1 Wheel Car1 Tyre Car1 Roof Car2 Alloy Car2 Tyre Car2 Roof Car3 Alloy Car3 Tyre Car3 Roof Car3 Leather Seats Now what I want to do is some query that I can feed two codes in and see the differences... IE If I feed in "Car1", "Car2" it would return something like; Parent Component Car1 Wheel Car2 Alloy As this is the difference between the two. If I said "Car1", "Car3" I would expect; Parent Component Car1 Wheel Car3 Alloy Car3 Leather Seats Your help with this matter would be greatly appreciated.

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Creating a search module dislpaying results in an iframe?

- by ivayloc

Hi, I have recently signed up for a travel affiliate program and I create a module with search fields to search in the affiliate program. What I need is a component with ..., so when I make a search the search results to shows in the ... in the component. In this way I can chose which other module to show or not with the search results. Could someone tell me how to do it or tell me a similar module/component. I would be grateful if you provide me with an answer or a solution of any kind! Thank you in advance!

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Android animation doesn't work, probably some kind of screen redraw problem.

- by BenIOs

I have created a custom component in my program by extending a ViewGroup. This component listens to touch events and are supposed to start animations when the user has move their finger past some certain points. I'm able to start animations while the user is touching the screen. But I'm not able to start animations if the user doesn't move their finger. It's probably that the phone thinks it doesn't have to update the screen if the user isn't moving their finger. I added some logs and according to them the animation starts and ends but it doesn't draw on the screen. I have the same problems when starting an animation with a timer. I use AlphaAnimations and TranslateAnimations on ImageViews. I have tried to use invalidate() both on the component and the ImageView but it doesn't help. Anyone who has an idea how to solve this?

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open source flash or ajax sketchpad?

- by Fh

For a non-profit (charity) site I need a simple sketchpad (drawing) component. It should be able to: Let the user draw a simple black on white sketch. Save to server the full drawing steps. Save to server the final image. Re-play the drawing steps to future users. http://www.sketchswap.com/ has a similar component. Do you know where I could find an open source component to use in this project? Thanks,

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FLEX: question about MXML syntax

- by Patrick

hi, I would like to know if it is the same to assign properties to my custom component in its own class, or from the parent document. Please see snippet below: Here I assign the property bottom in my custom component class: <?xml version="1.0"?> <mx:LinkButton bottom="20" > <mx:Script> ... Here I assign the property bottom when I use the component in my main MXML file <myComp:Brick bottom="10"/> Am I overriding the original one ? Thanks

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