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• How can I make my generic comparer (IComparer) handle nulls? [closed]

  - by Nick G

  Hi, I'm trying to write a generic object comparer for sorting, but I have noticed it does not handle the instance where one of the values it's comparing is null. When an object is null, I want it to treat it the same as the empty string. I've tried setting the null values to String.Empty but then I get an error of "Object must be of type String" when calling CompareTo() on it. public int Compare(T x, T y) { PropertyInfo propertyInfo = typeof(T).GetProperty(sortExpression); IComparable obj1 = (IComparable)propertyInfo.GetValue(x, null); IComparable obj2 = (IComparable)propertyInfo.GetValue(y, null); if (obj1 == null) obj1 = String.Empty; // This doesn't work! if (obj2 == null) obj2 = String.Empty; // This doesn't work! if (SortDirection == SortDirection.Ascending) return obj1.CompareTo(obj2); else return obj2.CompareTo(obj1); } I'm pretty stuck with this now! Any help would be appreciated.

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• How do I swap two objects in C# (specifically Mono) without triggering GC?

  - by TenFour04

  I have two array lists. that I want to swap each frame. My question is, does the variable 'temp' need to be a member variable to avoid triggering GC, assuming this method is called on dozens of objects each frame? I'm not creating a new object, just a new reference to an object. public void LateUpdate(){ ArrayList<int> temp = previousFrameCollisions; previousFrameCollisions = currentFrameCollisions; currentFrameCollisions = temp; currentFrameCollisions.clear(); } I've been told there's no reason to make a primitive into a member variable just to avoid GC, so my best guess is that this also applies to object references.

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• Collisions and Lists

  - by user50635

  I've run into an issue that breaks my collisions. Here's my method: Gather Input Project Rectangle Check for intersection and ispassable Update The update method is built on object_position * seconds_passed * velocity * speed. Input changes velocity and is normalized if 1. This method works well with just one object comparison, however I pass a list or a for loop to the collision detector and velocity gets changed back to a non zero when the list hits an object that passes the test and the object can pass through. Any solutions would be much appreciated. Side note is there a more proper way to simulate movement?

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• How can I find the closest vector to another in a specific direction?

  - by Sniper

  Perhaps I am not phrasing it incorrectly in my searches, but I can not find anything on this. I have a vector3 with a specific direction that it is facing, I want to get the closest object to that position in that specific direction. Basically I want to get the object that is being aimed at. I have thought about finding all objects within a box and then finding the closest object to my vector from them results, but I am sure that there is a more efficient way. The Z axis is optional, the objects are most likely within a few meters of the search vector. http://i.stack.imgur.com/FafAu.jpg

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• SQL Server Requery() sometimes hangs

  - by PSU

  I have an issue with Visual C++ and Microsoft SQL Server 2008R2. The following code will occasionally hang: Object->Update(); if(Object->CanRestart()) { //Why does this not return?? m_pDBRoRBaseObject->Requery(); } Object is derived from CRecordset. It looks to me as though a call to ::SQLExecute(m_hstmt) in the Requery() method is hanging, but I can't (with my current skill set anyway) figure out a way around this. Has anyone had a similar problem, or an insight of any sort?

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• Android AlertDialog with rounded corners: rectangle seen below corners

  - by user1455909

  I want a Dialog with rounded corners, but when the Dialog is seen there's a rectangle below it that's seen below the corners, like this: I build the dialog using a custom DialogFragment: public class MyDialogFragment extends DialogFragment{ @Override public Dialog onCreateDialog(Bundle savedInstanceState) { AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); LayoutInflater inflater = getActivity().getLayoutInflater(); builder.setView(inflater.inflate(R.layout.playdialog, null)); return builder.create(); } } The dialog layout (playdialog) has the following drawable as background: <?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" > <solid android:color="#AAAAAAAA" /> <stroke android:width="2dp" android:color="#FF000000" /> <corners android:radius="20dp" /> </shape> As I said, I set this drawable as background: android:background="@drawable/dialog_background" I don't want that rectangle to be seen. How can I do it?? In this post the user had the same problem. I tried to use the solution that worked for him but it didn't work for me. I modified my DialogFragment like this: public Dialog onCreateDialog(Bundle savedInstanceState) { AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); LayoutInflater inflater = getActivity().getLayoutInflater(); builder.setView(inflater.inflate(R.layout.playdialog, null)); Dialog d = builder.create(); d.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT)); return d; } The result is exactly the same. How can I remove that rectangle? Thanks!

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• Add an array of buttons to a GridView in an Android application

  - by Tai Squared

  I have an application that will have 5-15 buttons depending on what is available from a backend. How do I define the proper GridView layout files to include an array of buttons that will each have different text and other attributes? Each button will essentially add an item to a cart, so the onClick code will be the same except for the item it adds to the cart. How can I define an array so I can add a variable number of buttons, but still reference each of them by a unique ID? I've seen examples of the arrays.xml, but they have created an array of strings that are pre-set. I need a way to create an object and not have the text defined in the layout or arrays xml file. Update - Added info about adding to a GridView I want to add this to a GridView, so calling the addView method results in an UnsupportedOperationException. I can do the following: ImageButton b2 = new ImageButton(getApplicationContext()); b2.setBackgroundResource(R.drawable.img_3); android.widget.LinearLayout container = (android.widget.LinearLayout) findViewById(R.id.lay); container.addView(b2); but that doesn't layout the buttons in a grid like I would like. Can this be done in a GridView?

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• Resource not found using library project in Android

  - by hgpc

  I'm converting an existing project into a library project. I configured the original project as a library project and added an application project which references the original project as a library. The library project has an activity (MainActivity) and its layout (main.xml). The application project declares this activity as the main activity in the manifest like this: <activity android:name="com.example.MainActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> When I run the application project I get the following error... android.content.res.Resources$NotFoundException: Resource ID #0x7f030002 ...on the following line of the onCreate method of the main activity: setContentView(R.layout.main); 0x7f030002 is the ID of R.layout.main in the library project. The application project has no main resource. If I run the original project I don't get this error. Both projects neither have compilation errors nor warnings and are built with Android 2.2 with min SDK version 3. What might be the problem?

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• how to read user input from custom dialog in android?

  - by urobo

  I'd like to use a custom dialog built over an AlterDialog to obtain login info from the user. In this manner I first use the layoutinflater to get the layout and then put it in the AlertDialog.Builder.setView() method. LayoutInflater inflater = (LayoutInflater) Home.this.getSystemService(LAYOUT_INFLATER_SERVICE); layoutLogin = inflater.inflate(R.layout.login,(ViewGroup) findViewById(R.id.rl)); My layout consists of two textview and two editext for username and password respectively. Then I override the onCreateDialog method, checking the dialog id and putting all together, during the building phase I use the setButton(...) method to add a confirmation Button, neutral though: /* (non-Javadoc) * @see android.app.Activity#onCreateDialog(int) */ @Override protected Dialog onCreateDialog(int id) { AlertDialog d = null; AlertDialog.Builder builder = new AlertDialog.Builder(this); switch(id){ ... case Home.DIALOG_LOGIN: builder.setView(layoutLogin); builder.setMessage("Sign in to your DyCaPo Account").setCancelable(false); d=builder.create(); d.setTitle("Login"); Message msg = new Message(); msg.setTarget(Home.this.handleLogin); d.setButton(Dialog.BUTTON_NEUTRAL,"Sign in",msg); break; ... } return d; } Then I setup the Handler handleLogin: private Handler handleLogin= new Handler(){ /* (non-Javadoc) * @see android.os.Handler#handleMessage(android.os.Message) */ @Override public void handleMessage(Message msg) { String input = usernameInput.getText().toString(); //this should hold the EditText field for the username } }; which is just a stub up to now. what I don't get is when and where I have to access the two fields since I tried to save a reference to them but unfortunately I always get a null pointer exception. Can anyone tell me what I do wrong and give some guidelines to work with custom dialogs. Thanks in advance! :)

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• Android: How to keep onItemSelected from firing off on a newly instantiated Spinner

  - by Drennen

  I've thought of some less than elegant ways to solve this, but I know I must be missing something. My onItemSelected fires off immediately without any interaction with the user, and this is undesired behavior. I wish for the UI to wait until the user selects something before it does anything. I even tried setting up the listener in the onResume, hoping that would help, but it doesn't. How can I stop this from firing off before the user can touch the control? THANKS public class CMSHome extends Activity { private Spinner spinner; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // Heres my spinner /////////////////////////////////////////// spinner = (Spinner) findViewById(R.id.spinner); ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource( this, R.array.pm_list, android.R.layout.simple_spinner_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinner.setAdapter(adapter); }; public void onResume() { super.onResume(); spinner.setOnItemSelectedListener(new MyOnItemSelectedListener()); } public class MyOnItemSelectedListener implements OnItemSelectedListener { public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) { Intent i = new Intent(CMSHome.this, ListProjects.class); i.putExtra("bEmpID", parent.getItemAtPosition(pos).toString()); startActivity(i); Toast.makeText(parent.getContext(), "The pm is " + parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show(); } public void onNothingSelected(AdapterView parent) { // Do nothing. } } }

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• OAuthWebSecurity.VerifyAuthentication IsSuccessful returns false how do I to determine the reason?

  - by Eonasdan

  I'm using DotNetOpenAuth with a MVC 4 application. All the sudden Google auth is failing (MS is working). The stock code does this: [AllowAnonymous] public ActionResult ExternalLoginCallback(string returnUrl) { var result = OAuthWebSecurity.VerifyAuthentication(Url.Action("ExternalLoginCallback", new { ReturnUrl = returnUrl })); if (!result.IsSuccessful) { return RedirectToAction("ExternalLoginFailure"); } I know that result.IsSuccessful is false, but how do I get the reason? result.Error is null. I also looked at this page to use log4net. I do get a log on the local dev box but not when I deploy it to a remote server. log4net webconfig: <log4net> <appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender"> <file value="RelyingParty.log" /> <appendToFile value="true" /> <rollingStyle value="Size" /> <maxSizeRollBackups value="10" /> <maximumFileSize value="100KB" /> <staticLogFileName value="true" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date (GMT%date{%z}) [%thread] %-5level %logger - %message%newline" /> </layout> </appender> <!-- Setup the root category, add the appenders and set the default level --> <root> <level value="INFO" /> <appender-ref ref="RollingFileAppender" /> </root> <!-- Specify the level for some specific categories --> <logger name="DotNetOpenAuth"> <level value="ALL" /> </logger> </log4net> Edit I also tried log4net to a sql db but it still didn't log anything

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• html textfield in WebView in an Android application is hidden by the soft keyboard

  - by user280503

  Hello, I have an Android application that is a TabHost with a WebView. I use it to load a specific html file that has a text field in its bottom part. When I touch the html textfield, the soft keyboard pops up, and hides the textfield, so that I cannot see what I have typed. Here is the layout: <?xml version="1.0" encoding="utf-8"?> <TabHost xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/tabhost" android:layout_width="fill_parent" android:layout_height="fill_parent"> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/main" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TabWidget android:focusableInTouchMode="false" android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="63dp" /> <FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="fill_parent"> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/layout" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <WebView android:id="@+id/webview" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1" /> </LinearLayout> </FrameLayout> </LinearLayout> </TabHost> I have tried to configure the AndroidManifest.xml file with android:windowSoftInputMode="adjustResize" with no success. I have also tried replacing the FrameLayout in my layout with ScollView, but that caused my webview to increase in size indefinitely when the application is running.. this may be due to some javascript I have running on the page. I have noticed that the android's web browser has a nifty behaviour - in a web page, after the soft keyboard pops up, the web page scrolls smoothly so that the focusable textfield is visible to the user. How can I have this kind of behavior in my applicaiton?

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• how to add item to Spinner's ArrayAdapter?

  - by allen-c

  i had a EditText , a button and a spinner . When click the button , the spinner will add a new item with name you entered in the EditText. But here is the question, my adapter.add() method seems doesn't work...here is my code: public class Spr extends Activity { Button bt1; EditText et; ArrayAdapter<CharSequence> adapter; Spinner spinner; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); bt1 = (Button)this.findViewById(R.id.bt1); et = (EditText)this.findViewById(R.id.et); spinner = (Spinner)this.findViewById(R.id.spr); adapter = ArrayAdapter.createFromResource( this, R.array.planets_array, android.R.layout.simple_spinner_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinner.setAdapter(adapter); bt1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String temp = et.getText().toString(); adapter.add(temp); adapter.notifyDataSetChanged(); spinner.setAdapter(adapter); } }); spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){ @Override public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) { Toast.makeText(parent.getContext(), "The planet is " + parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show(); } @Override public void onNothingSelected(AdapterView<?> arg0) { }}); } }

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• Why does Graphviz fail on gvLayout?

  - by David Brown

  Once again, here I am writing C without really knowing what I'm doing... I've slapped together a simple function that I can call from a C# program that takes a DOT string, an output format, and a file name and renders a graph using Graphviz. #include "types.h" #include "graph.h" #include "gvc.h" #define FUNC_EXPORT __declspec(dllexport) // Return codes #define GVUTIL_SUCCESS 0 #define GVUTIL_ERROR_GVC 1 #define GVUTIL_ERROR_DOT 2 #define GVUTIL_ERROR_LAYOUT 3 #define GVUTIL_ERROR_RENDER 4 FUNC_EXPORT int RenderDot(char * dotData, const char * format, const char * fileName) { Agraph_t * g; // The graph GVC_t * gvc; // The Graphviz context int result; // Result of layout and render operations // Create a new graphviz context gvc = gvContext(); if (!gvc) return GVUTIL_ERROR_GVC; // Read the DOT data into the graph g = agmemread(dotData); if (!g) return GVUTIL_ERROR_DOT; // Layout the graph result = gvLayout(gvc, g, "dot"); if (result) return GVUTIL_ERROR_LAYOUT; // Render the graph result = gvRenderFilename(gvc, g, format, fileName); if (result) return GVUTIL_ERROR_RENDER; // Free the layout gvFreeLayout(gvc, g); // Close the graph agclose(g); // Free the graphviz context gvFreeContext(gvc); return GVUTIL_SUCCESS; } It compiles fine, but when I call it, I get GVUTIL_ERROR_LAYOUT. At first, I thought it might have been how I was declaring my P/Invoke signature, so I tested it from a C program instead, but it still failed in the same way. RenderDot("digraph graphname { a -> b -> c; }", "png", "C:\testgraph.png"); Did I miss something? EDIT If there's a chance it has to do with how I'm compiling the code, here's the command I'm using: cl gvutil.c /I "C:\Program Files (x86)\Graphviz2.26\include\graphviz" /LD /link /LIBPATH:"C:\Program Files (x86)\Graphviz2.26\lib\release" gvc.lib graph.lib cdt.lib pathplan.lib I've been following this tutorial that explains how to use Graphviz as a library, so I linked to the .lib files that it listed.

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• log4Net EventlogAppender does not work for Asp.Net 2.0 WebSite?

  - by Amitabh

  I have configured log4Net EventLogAppender for Asp.Net 2.0. However it does not log anything. I have following in my Web.Config. <log4net> <appender name="EventLogAppender" type="log4net.Appender.EventLogAppender"> <param name="LogName" value="Test Log" /> <param name="ApplicationName" value="Test-Web" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" /> </layout> </appender> <root> <priority value="ERROR"/> <appender-ref ref="EventLogAppender"/> </root> <logger name="NHibernate"> <level value="ERROR" /> <appender-ref ref="EventLogAppender" /> </logger> </log4net> I already have Test-Log Event Log created and AspNet user has permission on the Event Log registry entry. I also have log4Net configured in Global.asax Application_Start. log4net.Config.XmlConfigurator.Configure();

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• Process.CloseMainWindow() not working

  - by gehho

  I start the Windows On-Screen-Keyboard like that: s_onScreenKeyboard = new Process(); s_onScreenKeyboard.StartInfo = new ProcessStartInfo("osk.exe"); s_onScreenKeyboard.EnableRaisingEvents = true; s_onScreenKeyboard.Exited += new EventHandler(s_onScreenKeyboard_Exited); s_onScreenKeyboard.Start(); This works fine, but when I try to stop it using the following code, it does nothing: s_onScreenKeyboard.CloseMainWindow(); if (!s_onScreenKeyboard.HasExited) { if (!s_onScreenKeyboard.WaitForExit(1000)) { s_onScreenKeyboard.Close(); //s_onScreenKeyboard.Kill(); } } When uncommenting s_onScreenKeyboard.Kill(); it is closed, but the problem is that osk.exe obviously uses another process called "msswchx.exe" which is not closed if I simply kill the OSK process. This way, I would end up with hundreds of these processes which is not what I want. Another strange thing is that the CloseMainWindow() call worked at some time, but then it suddenly did not work anymore, and I do not remember what has changed. Any ideas? Background: I am implementing an On-Screen-Keyboard for my application because it should work with a touchscreen. It is important that the keyboard layout matches the layout which is configured in Windows since the application will be shipped to many different countries. Therefore, instead of implementing a custom keyboard control with approx. 537 keyboard layouts (exaggerating a little here...), I wanted to utilize the Windows built-in On-Screen-Keyboard which adapts to the selected keyboard layout automatically, saving a lot of work for me.

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• How to programmatically add view in ViewFlipper

  - by barmaleikin

  Hi, I have following main layout: <LinearLayout android:id="@+id/LinearLayout01" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical"> <ViewFlipper android:id="@+id/viewstack" android:layout_width="fill_parent" android:layout_height="fill_parent"> <!-- Here I want to add my views which are located in separated xml files. --> </ViewFlipper> </LinearLayout> Here is example of my view: view_url.xml view_text.xml <EditText android:text="@+id/EditText01" android:id="@+id/EditText01" android:layout_height="wrap_content" android:contentDescription="Enter your text here" android:layout_width="fill_parent" android:height="200dp"/> I am trying to add views: viewstack = (ViewFlipper) findViewById(R.id.viewstack);)); View viewText = (View) findViewById(R.layout.view_text); viewstack.addView(viewText); < -- Emulator is crashing at this line View viewUrl = (View) findViewById(R.layout.view_url); viewstack.addView(viewUrl); I dont have any idea what is wrong with my code. I decided to put all my views in one file, but I still want to know how to fix my initial code.

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• NoSuchProviderException: smtp with log4j SMTP appender

  - by user1016403

  I am using log4j to send an email when there is an exception. below is my log4j properties file configuration. log4j.rootLogger=WARN, R, email log4j.appender.R=org.apache.log4j.ConsoleAppender log4j.appender.R.layout=org.apache.log4j.PatternLayout log4j.appender.R.layout.ConversionPattern=%d{HH:mm:ss} %-5p [%c{1}]: %m%n log4j.appender.email=org.apache.log4j.net.SMTPAppender log4j.appender.email.BufferSize=10 log4j.appender.email.SMTPHost=myhost.com [email protected] [email protected] log4j.appender.email.Subject=Error log4j.appender.email.layout=org.apache.log4j.PatternLayout mine is maven project i have added dependencies for mail.jar, activation.jar and smtp.jar. But on application server startup itself i get below error: [ERROR] log4j:ERROR Error occured while sending e-mail notification. [ERROR] javax.mail.NoSuchProviderException: smtp [ERROR] at javax.mail.Session.getService(Session.java:782) [ERROR] at javax.mail.Session.getTransport(Session.java:708) [ERROR] at javax.mail.Session.getTransport(Session.java:651) [ERROR] at javax.mail.Session.getTransport(Session.java:631) [ERROR] at javax.mail.Session.getTransport(Session.java:686) [ERROR] at javax.mail.Transport.send0(Transport.java:166) Am i missing any thing here? What is the root cause of the error? is it because of incorrect SMTP host name? or is it because of any missing/conflicting dependencies?

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• Rolling comments inside a log4net file

  - by Maestro1024

  Rolling comments inside a log4net file Is it possible to roll the data inside the log file? So I have an xml config file like <log4net> <appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender"> <layout type="log4net.Layout.PatternLayout"> <ConversionPattern value="%d{yyyy-MM-dd hh:mm:ss} – %-5p: %m%n" /> </layout> <param name="File" value="c:\log.txt" /> <param name="AppendToFile" value="true" /> <rollingStyle value="Size" /> <maxSizeRollBackups value="1" /> <maximumFileSize value="5MB" /> <staticLogFileName value="false" /> </appender> <root> <level value="DEBUG" /> <appender-ref ref="LogFileAppender" /> </root> </log4net> What I want is to have a 5MB file that when it gets to the end will pull off the first line of the file and then add a new line at the end. Is that possible (I do not see it in the documentation)?

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• What am I missing with log4net - No log file created

  - by Saif Khan

  I am trying to use log4net in a VB.NET app for some unknown reason it's not creating the log file. Here is my app.config <?xml version="1.0" encoding="utf-8" ?> <configuration> <configSections> <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" /> </configSections> <log4net> <appender name="FileAppender" type="log4net.Appender.FileAppender"> <file value="c:\log-file.txt" /> <appendToFile value="true" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" /> </layout> </appender> <root> <level value="ALL" /> <appender-ref ref="FileAppender" /> </root> </log4net> </configuration> Here is the app code Imports log4net Public Class Form1 Dim log As ILog Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click log.Error("test") End Sub Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load log4net.Config.XmlConfigurator.Configure() log = log4net.LogManager.GetLogger("TestThings") End Sub End Class "TestThings" is the name of the VS project. What am I missing?

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• Graphviz or Dynagraph for Graph-manipulation Program?

  - by noahlavine

  I'm looking into writing a program that will show a graph to the user. The graph will change over time (the user should be able to right-click on a graph item and ask for more detail, which will pop out new bits of the graph), and the user might be able to drag parts of the graph around. I would ideally also like to be able to specify the relative layout of certain parts of the graph myself while leaving the overall layout up to a library, but that's not essential. I'm trying to decide on a graph layout library to use. As far as I can tell, the two leading candidates are Graphviz and Dynagraph. The Dynagraph website suggests that Graphviz is for drawing static graphs, and that Dynagraph was forked from Graphviz and contains algorithms for graphs that will be updated. It has a sample program called Dynasty that does exactly what I want. However, the Graphviz site contains an example program called Lefty which seems to do exactly what I want. Graphviz also seems to be much more widely used, judging by Google (and SO) results. Finally, I'd like to code the GUI part in a language like Python or Scheme, which makes me a bit hesitant to use C++ because I understand it's harder to interface that to interpreters. So my question is, which library is better for what I'm trying to do? Do they both have strong and weak points? Has one of them actually ceased development and is just leaving its website up to confuse me? (I've seen http://stackoverflow.com/questions/464000/simple-dynamic-graph-display-for-c and http://stackoverflow.com/questions/2376987/open-source-libraries-to-design-directed-graphs, but I can't tell whether they're right about the Graphviz or Dynagraph choice because of Lefty and also the language issue.)

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• Question about 'git branching'

  - by michael

  Hi, I read this about git branch: http://book.git-scm.com/3_basic_branching_and_merging.html so I follow it and create 1 branch : experimental And I 1. switch to experimental branch (git checkout experimental) 2. make a bunch of changes 3. commit it (git commit -a) 4. switch to master branch (git checkout master) 5. make some changes and commit there 6. switch back to experimental (git checkout experimental) 7. merge master change to experimental (git merge master) 8. there are some conflicts but after I resolve them, I did 'git add myfile' And now i am stuck, I can't move back to master when I do $ git checkout master error: Entry 'res/layout/my_item.xml' would be overwritten by merge. Cannot merge. and I did: $ git rebase --abort No rebase in progress? and I did : $ git add res/layout/socialhub_list_item.xml $ git checkout master error: Entry 'res/layout/my_item.xml' would be overwritten by merge. Cannot merge. What can I do so that I can go back to my master branch? Thank you.

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• ListView with Custom ArrayAdapter not updating

  - by Intelwalk

  I am currently trying to return a custom view of a textview, chrono, and checkbox. I have overriden the getView method but I am not sure if I did it correctly. I would appreciate some comments on the arrayadapter. It currently does not update in my application. Thanks! main java public class TaskTracker extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Button addButton; addButton=(Button)findViewById(R.id.button1); ListView myListView= (ListView)findViewById(R.id.listView1); final EditText myEditText= (EditText)findViewById(R.id.editText1) ; //final ArrayList<String> taskitems = new ArrayList<String>(); final TTAdapterView aa = new TTAdapterView(this); // aa = new ArrayAdapter<String>(this, 0); myListView.setAdapter(aa); addButton.setOnClickListener(new OnClickListener(){ public void onClick(View v){ aa.add(myEditText.getText().toString()); //taskitems.add(count, myEditText.getText().toString()); aa.notifyDataSetChanged(); myEditText.setText(""); myEditText.requestFocus(); } }); } } ArrayAdapter public class TTAdapterView extends ArrayAdapter<String> { public View v; public TTAdapterView(Context context){ super(context,R.layout.row); } @Override public View getView(int position, View convertView, ViewGroup parent){ this.v = convertView; if(v==null){ LayoutInflater vi = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); v = vi.inflate(R.layout.row, null); } return v; }

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• log4net: Creating a logger dynamically, should I worry about anything?

  - by vtortola

  Hi, I need to create loggers dynamically, so with a post from here and the help of reflector I have managed to create loggers dynamically, but I'd like to know if I should worry about something else ... I don't know wich implications can have do it. public static ILog GetDyamicLogger(Guid applicationId) { Hierarchy hierarchy = (Hierarchy)LogManager.GetRepository(); RollingFileAppender roller = new RollingFileAppender(); roller.LockingModel = new log4net.Appender.FileAppender.MinimalLock(); roller.AppendToFile = true; roller.RollingStyle = RollingFileAppender.RollingMode.Composite; roller.MaxSizeRollBackups = 14; roller.MaximumFileSize = "15000KB"; roller.DatePattern = "yyyyMMdd"; roller.Layout = new log4net.Layout.PatternLayout(); roller.File = "App_Data\\Logs\\"+applicationId.ToString()+"\\debug.log"; roller.StaticLogFileName = true; PatternLayout patternLayout = new PatternLayout(); patternLayout.ConversionPattern = "%date [%thread] %-5level %logger [%property{NDC}] - %message%newline"; patternLayout.ActivateOptions(); roller.Layout = patternLayout; roller.ActivateOptions(); hierarchy.Root.AddAppender(roller); hierarchy.Root.Level = Level.All; hierarchy.Configured = true; DummyLogger dummyILogger = new DummyLogger(applicationId.ToString()); dummyILogger.Hierarchy = hierarchy; dummyILogger.Level = log4net.Core.Level.All; dummyILogger.AddAppender(roller); return new LogImpl(dummyILogger); } internal sealed class DummyLogger : Logger { // Methods internal DummyLogger(string name) : base(name) { } } Cheers.

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• How do you word wrap a RichTextField for Blackberry

  - by Kai

  I've been trying to modify a rich text field to display correctly in its half of the horizontal field. The goal is this: --------------------------- | address is | ***********| | very long | ** IMAGE **| | state, zip | ***********| --------------------------- Where address is a single string separate from the city and zip. I am modifying the address field like this: RichTextField addrField = new RichTextField(address) { public int getPreferredWidth() { return 200; } protected void layout(int maxWidth,int maxHeight) { super.layout(getPreferredWidth(),maxHeight); setExtent(getPreferredWidth(), getHeight()); } }; The results look like this: ----------------------------- | address is ve| ***********| | state, zip | ** IMAGE **| | | ***********| ----------------------------- where clearly the address is just going under the image. Both horizontal fields are static 200 pixels wide. It's not like the system wouldn't know where to wrap the address. However, I have heard it is not easy to do this and is not done automatically. I have had no success finding a direct answer online. I have found people saying you need to do it in a custom layout manager, some refer to the RichTextField API, which is of no use. But nobody actually mentions how to do it. I understand that I may need to read character by character and set where the line breaks should happen. What I don't know is how exactly to do any of this. You can't just count characters and assume each is worth 5 pixels, and you shouldn't have to. Surely there must be some way to achieve this in a way that makes sense. Any suggestions?

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