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  • Why does my UITableView change from UITableViewStyleGrouped to UITableViewStylePlain

    - by casper
    My application has a view controller that extends UITableViewController. The initialization method looks like this: - (id)initWithCoder:(NSCoder*)coder { if (self = [super initWithCoder:coder]) { self.tableView = [[UITableView alloc] initWithFrame:self.tableView.frame style:UITableViewStyleGrouped]; } return self; } When the view is initially loaded, it's displayed as UITableViewStyleGrouped. However, if my app ever receives a low memory warning, the above view changes to UITableViewStylePlain. There is no associated xib file with the View/Controller. The viewDidUnload and didReceiveMemoryWarning methods are straightforward: - (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } - (void)viewDidUnload { // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } My question is, why does the table style change when I receive a memory warning?

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  • Compile redeclaration error of global variable in C++, but not in C.

    - by coelhudo
    Suppose that I have those three files: a.h //a.h header #include <stdio.h> int int_variable; void a_f() { printf("int_variable: %d\n", int_variable) int_variable++; } b.h //b.h header #include <stdio.h> int int_variable; void b_f() { printf("int_variable: %d\n", int_variable) int_variable++; } main.c //main.c #include "a.h" #include "b.h" int main() { a_f(); b_f(); return 0; } Why compiling in C++ generates redefinition error, but in C doesn't? I am C++ developer, then in C++ makes sense to me, but why in C this is not an error? When I executed the C generated code, the output was: int variable: 0 int variable: 1 Thanks

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  • Using android gesture on top of menu buttons

    - by chriacua
    What I want is to have an options menu where the user can choose to navigate the menu between: 1) touching a button and then pressing down on the trackball to select it, and 2) drawing predefined gestures from Gestures Builder As it stands now, I have created my buttons with OnClickListener and the gestures with GestureOverlayView. Then I select starting a new Activity depending on whether the using pressed a button or executed a gesture. However, when I attempt to draw a gesture, it is not picked up. Only pressing the buttons is recognized. The following is my code: public class Menu extends Activity implements OnClickListener, OnGesturePerformedListener { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //create TextToSpeech myTTS = new TextToSpeech(this, this); myTTS.setLanguage(Locale.US); //create Gestures mLibrary = GestureLibraries.fromRawResource(this, R.raw.gestures); if (!mLibrary.load()) { finish(); } // Set up click listeners for all the buttons. View playButton = findViewById(R.id.play_button); playButton.setOnClickListener(this); View instructionsButton = findViewById(R.id.instructions_button); instructionsButton.setOnClickListener(this); View modeButton = findViewById(R.id.mode_button); modeButton.setOnClickListener(this); View statsButton = findViewById(R.id.stats_button); statsButton.setOnClickListener(this); View exitButton = findViewById(R.id.exit_button); exitButton.setOnClickListener(this); GestureOverlayView gestures = (GestureOverlayView) findViewById(R.id.gestures); gestures.addOnGesturePerformedListener(this); } public void onGesturePerformed(GestureOverlayView overlay, Gesture gesture) { ArrayList<Prediction> predictions = mLibrary.recognize(gesture); // We want at least one prediction if (predictions.size() > 0) { Prediction prediction = predictions.get(0); // We want at least some confidence in the result if (prediction.score > 1.0) { // Show the gesture Toast.makeText(this, prediction.name, Toast.LENGTH_SHORT).show(); //User drew symbol for PLAY if (prediction.name.equals("Play")) { myTTS.shutdown(); //connect to game // User drew symbol for INSTRUCTIONS } else if (prediction.name.equals("Instructions")) { myTTS.shutdown(); startActivity(new Intent(this, Instructions.class)); // User drew symbol for MODE } else if (prediction.name.equals("Mode")){ myTTS.shutdown(); startActivity(new Intent(this, Mode.class)); // User drew symbol to QUIT } else { finish(); } } } } @Override public void onClick(View v) { switch (v.getId()){ case R.id.instructions_button: startActivity(new Intent(this, Instructions.class)); break; case R.id.mode_button: startActivity(new Intent(this, Mode.class)); break; case R.id.exit_button: finish(); break; } } Any suggestions would be greatly appreciated!

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  • how to check if there is a division by zero in c

    - by user244775
    #include<stdio.h> void function(int); int main() { int x; printf("Enter x:"); scanf("%d", &x); function(x); return 0; } void function(int x) { float fx; fx=10/x; if(10 is divided by zero)// I dont know what to put here please help printf("division by zero is not allowed"); else printf("f(x) is: %.5f",fx); }

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  • Trace() method doesnt work in FlashDevelop

    - by numerical25
    When I put a trace("test"); at the entry point of my flashdevelop project and run it. The application runs fine but I do not see the trace in the output. Below is my code package { import flash.display.Sprite; import flash.events.Event; /** * ... * @author Anthony Gordon */ public class Main extends Sprite { public function Main():void { if (stage) init(); else addEventListener(Event.ADDED_TO_STAGE, init); } private function init(e:Event = null):void { trace("test"); removeEventListener(Event.ADDED_TO_STAGE, init); // entry point var game:Game = new Game(stage); addChild(game); } }

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  • Help needed with InvokeRequired for Web.UI

    - by Ali
    I have a multi-threaded application in C# which tries to write to a TextBox in a Windows.Forms created by another thread. As threads cannot modify what has not been created by them, I was using InvokeRequired as shown on the code below, to solve this problem. public delegate void MessageDelegate(Communication message); void agent_MessageReceived(Communication message) { if (InvokeRequired) { BeginInvoke(new MessageDelegate(agent_MessageReceived), new object[] { message }); } else { TextBox1.Text += message.Body; } } Now I need to do the same for a TextBox in an ASP.NET app, but apparently neither InvokeRequired nor BeginInvoke exist for TextBox in a Web.UI. What can I do?

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  • asp.net - csharp - jquery - looking for a better and usage solution

    - by LostLord
    hi my dear friends i have a little problem about using jquery...(i reeally do not know jquery but i forced to use it) i am using vs 2008 - asp.net web app with c# also i am using telerik controls in my pages also i am using sqldatasources (Connecting to storedprocedures) in my pages my pages base on master and content pages and in content pages i have mutiviews ================================================================================= in one of the views(inside one of those multiviews)i had made two radcombo boxes for country and city requirement like cascading dropdowns as parent and child combo boxes. i used old way for doing that , i mean i used update panel and in the SelectedIndexChange Event of Parent RadComboBox(Country) i Wrote this code : protected void RadcomboboxCountry_SelectedIndexChanged(object o, RadComboBoxSelectedIndexChangedEventArgs e) { hfSelectedCo_ID.Value = RadcomboboxCountry.SelectedValue; RadcomboboxCity.Items.Clear(); RadcomboboxCity.Items.Add(new RadComboBoxItem(" ...", "5")); RadcomboboxCity.DataBind(); RadcomboboxCity.SelectedIndex = 0; } my child radcombo box can fill by upper code , let me tell you how : the child sqldatasource have a sp that has a parameter and i fill that parameter by this line - hfSelectedCo_ID.Value = RadcbCoNameInInsert.SelectedValue; RadcbCoNameInInsert.SelectedValue means country ID. after doing that SelectedIndexChange Event of Parent RadComboBox(Country) could not be fire therefore i forced to set the autopostback property to true. afetr doing that every thing was ok until some one told me can u control focus and keydown of your radcombo boxes (when u press enter key on the parent combobox[country] , so child combobox gets focus -- and when u press upperkey on child radcombobox [city], so parent combobox[country] gets focus) (For Users That Do Not Want To Use Mouse for Input Info And Choose items) i told him this is web app , not win form and we can not do that. i googled it and i found jquery the only way for doing that ... so i started using jquery . i wrote this code with jquery for both of them : <script src="../JQuery/jquery-1.4.1.js" language="javascript" type="text/javascript"></script> <script type="text/javascript"> $(function() { $('input[id$=RadcomboboxCountry_Input]').focus(); $('input[id$=RadcomboboxCountry_Input]').select(); $('input[id$=RadcomboboxCountry_Input]').bind('keyup', function(e) { var code = (e.keyCode ? e.keyCode : e.which); if (code == 13) { -----------> Enter Key $('input[id$=RadcomboboxCity_Input]').focus(); $('input[id$=RadcomboboxCity_Input]').select(); } }); $('input[id$=RadcomboboxCity_Input]').bind('keyup', function(e) { var code = (e.keyCode ? e.keyCode : e.which); if (code == 38) { -----------> Upper Key $('input[id$=RadcomboboxCountry_Input]').focus(); $('input[id$=RadcomboboxCountry_Input]').select(); } }); }); </script> this jquery code worked BBBBBBUUUUUUUTTTTTT autopostback=true of the Parent RadComboBox Became A Problem , Because when SelectedIndex Change Of ParentRadComboBox is fired after that Telerik Skins runs and after that i lost parent ComboBox Focus and we should use mouse but we don't want it.... for fix this problem i decided to set autopostback of perentCB to false and convert protected void RadcomboboxCountry_SelectedIndexChanged(object o, RadComboBoxSelectedIndexChangedEventArgs e) { hfSelectedCo_ID.Value = RadcomboboxCountry.SelectedValue; RadcomboboxCity.Items.Clear(); RadcomboboxCity.Items.Add(new RadComboBoxItem(" ...", "5")); RadcomboboxCity.DataBind(); RadcomboboxCity.SelectedIndex = 0; } to a public non static method without parameters and call it with jquey like this : (i used onclientchanged property of parentcombo box like onclientchanged = "MyMethodForParentCB_InJquery();" insread of selectedindexchange event) public void MyMethodForParentCB_InCodeBehind() { hfSelectedCo_ID.Value = RadcomboboxCountry.SelectedValue; RadcomboboxCity.Items.Clear(); RadcomboboxCity.Items.Add(new RadComboBoxItem(" ...", "5")); RadcomboboxCity.DataBind(); RadcomboboxCity.SelectedIndex = 0; } for doing that i read the blow manual and do that step by step : ======================================================================= http://www.ajaxprojects.com/ajax/tutorialdetails.php?itemid=732 ======================================================================= but this manual is about static methods and this is my new problem ... when i am using static method like : public static void MyMethodForParentCB_InCodeBehind() { hfSelectedCo_ID.Value = RadcomboboxCountry.SelectedValue; RadcomboboxCity.Items.Clear(); RadcomboboxCity.Items.Add(new RadComboBoxItem(" ...", "5")); RadcomboboxCity.DataBind(); RadcomboboxCity.SelectedIndex = 0; } so i recieved some errors and this method could not recognize my controls and hidden field... one of those errors like this : Error 2 An object reference is required for the non-static field, method, or property 'Darman.SuperAdmin.Users.hfSelectedCo_ID' C:\Javad\Copy of Darman 6\Darman\SuperAdmin\Users.aspx.cs 231 13 Darman any idea or is there any way to call non static methods with jquery (i know we can not do that but is there another way to solve my problem)???????????????

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  • Flex/Flash 4 datagrid literally displays XML

    - by Setori
    Problem: Flex/Flash4 client (built with FlashBuilder4) displays the xml sent from the server exactly as is - the datagrid keeps the format of the xml. I need the datagrid to parse the input and place the data in the correct rows and columns of the datagrid. flow: click on a date in the tree and it makes a server request for batch information in xml form. Using a CallResponder I then update the datagrid's dataProvider. [code] <fx:Script> <![CDATA[ import mx.controls.Alert; [Bindable]public var selectedTreeNode:XML; public function taskTreeChanged(event:Event):void { selectedTreeNode=Tree(event.target).selectedItem as XML; var searchHubId:String = selectedTreeNode.@hub; var searchDate:String = selectedTreeNode.@lbl; if((searchHubId == "") || (searchDate == "")){ return; } findShipmentBatches(searchDate,searchHubId); } protected function findShipmentBatches(searchDate:String, searchHubId:String):void{ findShipmentBatchesResult.token = actWs.findShipmentBatches(searchDate, searchHubId); } protected function updateBatchDataGridDP():void{ task_list_dg.dataProvider = findShipmentBatchesResult.lastResult; } ]]> </fx:Script> <fx:Declarations> <actws:ActWs id="actWs" fault="Alert.show(event.fault.faultString + '\n' + event.fault.faultDetail)" showBusyCursor="true"/> <s:CallResponder id="findShipmentBatchesResult" result="updateBatchDataGridDP()"/> </fx:Declarations> <mx:AdvancedDataGrid id="task_list_dg" width="100%" height="95%" paddingLeft="0" paddingTop="0" paddingBottom="0"> <mx:columns> <mx:AdvancedDataGridColumn headerText="Receiving date" dataField="rd"/> <mx:AdvancedDataGridColumn headerText="Msg type" dataField="mt"/> <mx:AdvancedDataGridColumn headerText="SSD" dataField="ssd"/> <mx:AdvancedDataGridColumn headerText="Shipping site" dataField="sss"/> <mx:AdvancedDataGridColumn headerText="File name" dataField="fn"/> <mx:AdvancedDataGridColumn headerText="Batch number" dataField="bn"/> </mx:columns> </mx:AdvancedDataGrid> [/code] I cannot upload a pic, but this is the xml: [code] 2010-04-23 16:35:51.0 PRESHIP 2010-02-15 00:00:00.0 100000009 DF-Ocean-PRESHIPSUM-Quanta-PACT-EMEA-Scheduled Ship Date 20100215.csv 10053 [/code] and the xml is pretty much displayed exactly as is in the datagrid columns... I would appreciate your assistance.

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  • BackgroundWorker not working with TeamCity NUnit runner

    - by Catalin DICU
    I'm using NUnit to test View Models in a WPF 3.5 application and I'm using the BackgroundWorker class to execute asynchronous commands.The unit test are running fine with the NUnit runner or ReSharper runner but fail on TeamCity 5.1 server. How is it implemented : I'm using a ViewModel property named IsBusy and set it to false on BackgroundWorker.RunWorkerCompleted event. In my test I'm using this method to wait for the BackgroundWorker to finish : protected void WaitForBackgroundOperation(ViewModel viewModel) { int count = 0; while (viewModel.IsBusy) { RunBackgroundWorker(); if (count++ >= 100) { throw new Exception("Background operation too long"); } Thread.Sleep(100); } } private static void RunBackgroundWorker() { Dispatcher.CurrentDispatcher.Invoke(DispatcherPriority.Background, new ThreadStart(delegate { })); System.Windows.Forms.Application.DoEvents(); } Well, sometimes it works and sometimes it hangs the build. I suppose it's the Application.DoEvents() but I don't know why...

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  • How to Automatically re-raise Exceptions

    - by Brian
    If you wrap a call to HttpResponse.End within a try catch block, the ThreadAbortException would automatically be re-raised. I assume this is the case even if you wrap the try catch block in a try catch block. How can I accomplish the same thing? I do not have a real-world application for this. namespace Program { class ReJoice { public void End() //This does not automatically re-raise the exception if caught. { throw new Exception(); } } class Program { static void Main(string[] args) { try { ReJoice x = new ReJoice(); x.End(); } catch (Exception e) {} } } }

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  • Stop a stopwatch

    - by James Morgan
    I have the following code in a JPanel class which is added to a another class (JFrame). What I'm trying to implement is some sort of a stopwatch program. startBtn.addActionListener(new startListener()); class startListener implements ActionListener { public void actionPerformed(ActionEvent e) { Timer time = new Timer(); time.scheduleAtFixedRate(new Stopwatch(), 1000, 1000); } } This is another class which basically the task. public class Stopwatch extends TimerTask { private final double start = System.currentTimeMillis(); public void run() { double curr = System.currentTimeMillis(); System.out.println((curr - start) / 1000); } } The timer works fine and this is definitely far from complete but I'm not sure how to code the stop button which should stop the timer. Any advice on this? BTW I'm using java.util.timer

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  • can not set the bool value of app setting

    - by user262325
    Hello everyone I use the codes below to read and write a bool value from my application: -(void)SaveAppSetting; {     NSUserDefaults *defaults=[NSUserDefaults standardUserDefaults];     bool b=true;     [defaults setBool:b forKey:@"AnyKey"]; [defaults synchronize]; } -(void)LoadAppSetting; {     NSUserDefaults *defaults=[NSUserDefaults standardUserDefaults];     bool b=[defaults boolForKey: @"AnyKey"] ; } I found that "LoadAppSetting" worked well, it could get the correct value of item with key "AnyKey". The function "SaveAppSetting" looked like no function, it reported no error, but it can not change value of the item with key "AnyKey". "AnyKey" setting in Setting bundle is item Dictionary Type String PSToggleSwitchSpecifier Title String AnyKey's Title Key String AnyKey DefaultValue Boolean Checked Is there any person met the same problem? Thanks interdev

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  • How to use DAOs with hibernate/jpa?

    - by Ari
    Assuming the DAO structure and component interaction described below, how should DAOs be used with persistence layers like hibernate and toplink? What methods should/shouldn't they contain? Would it be bad practice to move the code from the DAO directly to the service? For example, let's say that for every model we have a DAO (that may or may not implement a base interface) that looks something like the following: public class BasicDao<T> { public List<T> list() { ... } public <T> retrieve() { ... } public void save() { ... } public void delete() { ... } } Component interaction pattern is -- service DAO model

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  • disable event-bubbling c# wpf

    - by Ruben
    Hi, I'm having the following problem: When I got two labels into each other: <Label x:Name="First" MouseUp="Label_MouseUp"> <Label x:Name="Second" MouseUp="Label_MouseUp_1">This is a label into another label</Label> </Label> And the following code: private void Label_MouseUp(object sender, MouseButtonEventArgs e) { Console.WriteLine("Do NOT show me"); } private void Label_MouseUp_1(object sender, MouseButtonEventArgs e) { Console.WriteLine("Show me"); } When i click "Second", I want it to trigger only "Label_MouseUp_1". But in my console i get: Show me Do NOT show me Is there a way to turn off the bubbling events? (also, "First" has to be clickable, so removing the event there doesn't solve the problem) Thnx

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  • XmlSerializer throws exception when serializing dynamically loaded type

    - by Dr. Sbaitso
    Hi I'm trying to use the System.Xml.Serialization.XmlSerializer to serialize a dynamically loaded (and compiled class). If I build the class in question into the main assembly, everything works as expected. But if I compile and load the class from an dynamically loaded assembly, the XmlSerializer throws an exception. What am I doing wrong? I've created the following .NET 3.5 C# application to reproduce the issue: using System; using System.Collections.Generic; using System.Xml.Serialization; using System.Text; using System.Reflection; using System.CodeDom.Compiler; using Microsoft.CSharp; public class StaticallyBuiltClass { public class Item { public string Name { get; set; } public int Value { get; set; } } private List<Item> values = new List<Item>(); public List<Item> Values { get { return values; } set { values = value; } } } static class Program { static void Main() { RunStaticTest(); RunDynamicTest(); } static void RunStaticTest() { Console.WriteLine("-------------------------------------"); Console.WriteLine(" Serializing StaticallyBuiltClass..."); Console.WriteLine("-------------------------------------"); var stat = new StaticallyBuiltClass(); Serialize(stat.GetType(), stat); Console.WriteLine(); } static void RunDynamicTest() { Console.WriteLine("-------------------------------------"); Console.WriteLine(" Serializing DynamicallyBuiltClass..."); Console.WriteLine("-------------------------------------"); CSharpCodeProvider csProvider = new CSharpCodeProvider(new Dictionary<string, string> { { "CompilerVersion", "v3.5" } }); CompilerParameters csParams = new System.CodeDom.Compiler.CompilerParameters(); csParams.GenerateInMemory = true; csParams.GenerateExecutable = false; csParams.ReferencedAssemblies.Add("System.dll"); csParams.CompilerOptions = "/target:library"; StringBuilder classDef = new StringBuilder(); classDef.AppendLine("using System;"); classDef.AppendLine("using System.Collections.Generic;"); classDef.AppendLine(""); classDef.AppendLine("public class DynamicallyBuiltClass"); classDef.AppendLine("{"); classDef.AppendLine(" public class Item"); classDef.AppendLine(" {"); classDef.AppendLine(" public string Name { get; set; }"); classDef.AppendLine(" public int Value { get; set; }"); classDef.AppendLine(" }"); classDef.AppendLine(" private List<Item> values = new List<Item>();"); classDef.AppendLine(" public List<Item> Values { get { return values; } set { values = value; } }"); classDef.AppendLine("}"); CompilerResults res = csProvider.CompileAssemblyFromSource(csParams, new string[] { classDef.ToString() }); foreach (var line in res.Output) { Console.WriteLine(line); } Assembly asm = res.CompiledAssembly; if (asm != null) { Type t = asm.GetType("DynamicallyBuiltClass"); object o = t.InvokeMember("", BindingFlags.CreateInstance, null, null, null); Serialize(t, o); } Console.WriteLine(); } static void Serialize(Type type, object o) { var serializer = new XmlSerializer(type); try { serializer.Serialize(Console.Out, o); } catch(Exception ex) { Console.WriteLine("Exception caught while serializing " + type.ToString()); Exception e = ex; while (e != null) { Console.WriteLine(e.Message); e = e.InnerException; Console.Write("Inner: "); } Console.WriteLine("null"); Console.WriteLine(); Console.WriteLine("Stack trace:"); Console.WriteLine(ex.StackTrace); } } } which generates the following output: ------------------------------------- Serializing StaticallyBuiltClass... ------------------------------------- <?xml version="1.0" encoding="IBM437"?> <StaticallyBuiltClass xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <Values /> </StaticallyBuiltClass> ------------------------------------- Serializing DynamicallyBuiltClass... ------------------------------------- Exception caught while serializing DynamicallyBuiltClass There was an error generating the XML document. Inner: The type initializer for 'Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterDynamicallyBuiltClass' threw an exception. Inner: Object reference not set to an instance of an object. Inner: null Stack trace: at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id) at System.Xml.Serialization.XmlSerializer.Serialize(TextWriter textWriter, Object o, XmlSerializerNamespaces namespaces) at System.Xml.Serialization.XmlSerializer.Serialize(TextWriter textWriter, Object o) at Program.Serialize(Type type, Object o) in c:\dev\SerTest\SerTest\Program.cs:line 100 Edit: Removed some extraneous referenced assemblies

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  • objective-c Derived class may not respond to base class method

    - by zadam
    Hi, I have derived from a 3rd party class, and when I attempt to call a method in the base class, I get the x may not respond to y compiler warning. How can I remove the warning? Repro: @interface ThirdPartyBaseClass : NSObject {} +(id)build; -(void)doStuff; @end @implementation ThirdPartyBaseClass +(id) build{ return [[[self alloc] init] autorelease]; } -(void)doStuff{ } @end @interface MyDerivedClass : ThirdPartyBaseClass {} +(id)buildMySelf; @end @implementation MyDerivedClass +(id)buildMySelf{ self = [ThirdPartyBaseClass build]; [self doStuff]; // compiler warning here - 'MyDerivedClass' may not respond to '+doStuff' return self; } @end Thanks!

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  • Syntax for specializing function templates

    - by FredOverflow
    Is there a difference between the following approaches? // approach 1 namespace std { template<> void swap<Foo>(Foo& x, Foo& y) // note the <Foo> { x.swap(y); } } // approach 2 namespace std { template<> void swap(Foo& x, Foo& y) { x.swap(y); } } I stumpled upon this when I tried to specialize swap for my own string type and noticed that swap<::string> doesn't work, but for a completely different reason :)

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  • Flex - Problem with auto resizing datagrid

    - by Marty Pitt
    Hi All I'm trying to create a datagrid which will resize vertically to ensure all the renderers are displayed in full. Additionally, Renderers are of variable height Renderers can resize themselves Generally speaking, the flow of events is as follows : One of the item renderers resizes itself (normally in response to a user click etc) It dispatches a bubbling event which the parent datagrid picks up The DataGrid attempts to resize to ensure that all renderers remain visible in full. I'm currently using this code within the datagrid to calculate the height: height = measureHeightOfItems(0, dataProvider.length ) + headerHeight; This appears to get an incorrect height. I've tried a number of variations including callLater ( to ensure the resize has completed so measure can work correctly), and overriding meausre() and calling invalidateSize() / validateSize(), but neither works. Below are 3 classes which will illustrate the problem. Clicking the button in the item renderers resizes the renderer. The grid should also expand so that all of the 3 renderers are shown in their entirety. Any suggestions would be greatly appreciated. Regards Marty DataGridProblem.mxml (Application file) <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" xmlns:view="view.*"> <mx:ArrayCollection id="dataProvider"> <mx:String>Item A</mx:String> <mx:String>Item B</mx:String> <mx:String>Item C</mx:String> </mx:ArrayCollection> <view:TestDataGrid id="dg" dataProvider="{ dataProvider }" width="400"> <view:columns> <mx:DataGridColumn dataField="text" /> <mx:DataGridColumn itemRenderer="view.RendererButton" /> </view:columns> </view:TestDataGrid> </mx:Application> view.TestDataGrid.as package view { import flash.events.Event; import mx.controls.DataGrid; import mx.core.ScrollPolicy; public class TestDataGrid extends DataGrid { public function TestDataGrid() { this.verticalScrollPolicy = ScrollPolicy.OFF; this.variableRowHeight = true; this.addEventListener( RendererButton.RENDERER_RESIZE , onRendererResize ); } private function onRendererResize( event : Event ) : void { resizeDatagrid(); } private function resizeDatagrid():void { height = measureHeightOfItems(0, dataProvider.length ) + headerHeight; } } } view.RendererButton.mxml <?xml version="1.0" encoding="utf-8"?> <mx:HBox xmlns:mx="http://www.adobe.com/2006/mxml"> <mx:Button width="50" height="50" click="onClick()" /> <mx:Script> <![CDATA[ public static const RENDERER_RESIZE : String = "resizeRenderer"; private function onClick() : void { this.height += 20; dispatchEvent( new Event( RENDERER_RESIZE , true ) ); } ]]> </mx:Script> </mx:HBox>

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  • JavaFX FXML communication between Application and Controller classes

    - by likethesky
    I am trying to get and destroy an external process I've created via ProcessBuilder in my FXML application close, but it's not working. This is based on the helpful advice Sergey Grinev gave me here. I have tried running with/without the "// myController.setApp(this);" and with "// super.stop();" at top of subclass and at bottom (see commented out/in for that line in MyApp), but no combination works. This probably isn't related to FXML or JavaFX, though I imagine this is a common pattern for developing apps on JavaFX. I suppose I'm asking for a Java best practice for closing dependent processes in a UI-based app like this one (in this case: FXML / JavaFX based), where there is a controller class and an application class. Can you explain what I'm doing wrong? Or better: advise what I should be doing instead? Thanks. In my Application I do this: public class MyApp extends Application { @Override public void start(Stage primaryStage) throws Exception { FXMLLoader fxmlLoader = new FXMLLoader(); Scene scene = (Scene)FXMLLoader.load(getClass().getResource("MyApp.fxml")); MyAppController myController = (MyAppController)fxmlLoader.getController(); primaryStage.setScene(scene); primaryStage.show(); // myController.setApp(this); } @Override public void stop() throws Exception { // super.stop(); // this is called on fx app close, you may call it in an action handler too if (MyAppController.getScriptProcess() != null) { MyAppController.getScriptProcess().destroy(); } super.stop(); } public static void main(String[] args) { launch(args); } } In my Controller I do this: public class MyAppController implements Initializable { private Application app; private static Process scriptProcess; public void setApp(Application a) { app = a; } public static Process getScriptProcess() { return scriptProcess; } } The result when I run with the "commented-out setApp()" not commented out (that is, left in the start method), is the following, immediately upon launch (the main Scene flashes, then disappears, then this dialog appears: "JavaFX Launcher Error: Exception while running Application" And it gives an, "Exception in Application start method" in the console as well. The result when I leave out the "commented-out code" in my MyApp above (that is, remove the "setApp()" from the start method), is that my app does indeed close, but gives this error when it closes: Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1440) at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:69) at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:217) at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:170) at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:38) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92) at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:53) at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:28) at javafx.event.Event.fireEvent(Event.java:171) at javafx.scene.Node.fireEvent(Node.java:6863) at javafx.scene.control.Button.fire(Button.java:179) at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:193) at com.sun.javafx.scene.control.skin.SkinBase$4.handle(SkinBase.java:336) at com.sun.javafx.scene.control.skin.SkinBase$4.handle(SkinBase.java:329) at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:64) at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:217) at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:170) at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:38) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92) at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:53) at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:33) at javafx.event.Event.fireEvent(Event.java:171) at javafx.scene.Scene$MouseHandler.process(Scene.java:3324) at javafx.scene.Scene$MouseHandler.process(Scene.java:3164) at javafx.scene.Scene$MouseHandler.access$1900(Scene.java:3119) at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1559) at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2261) at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:228) at com.sun.glass.ui.View.handleMouseEvent(View.java:528) at com.sun.glass.ui.View.notifyMouse(View.java:922) at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method) at com.sun.glass.ui.gtk.GtkApplication$3$1.run(GtkApplication.java:82) at java.lang.Thread.run(Thread.java:722) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1435) ... 44 more Caused by: java.lang.NullPointerException at mypackage.MyController.handleCancel(MyController.java:300) ... 49 more Clean up...

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  • Stack Overflow Exploit in C

    - by Fernando Gonzalez
    Hey there guys, the question is actually about stack overflows in C. I have an assigment that I can not get done for the life of me, i've looked at everything in the gdb and I just cant figure it. The question is the following: int i,n; void confused() { printf("who called me"); exit(0); } void shell_call(char *c) { printf(" ***Now calling \"%s\" shell command *** \n",c); system(c); exit(0); } void victim_func() { int a[4]; printf("[8]:%x\n", &a[8]); printf("Enter n: "); scanf("%d",&n); printf("Enter %d HEX Values \n",n); for(i=0;i<n;i++) scanf("%x",&a[i]); printf("Done reading junk numbers\n"); } int main() { printf("ls=736c --- ps = 7370 --- cal = 6c6163\n"); printf("location of confused %x \n", confused); printf("location of shell_call %x \n", shell_call); victim_func(); printf("Done, thank you\n"); } Ok, so I managed to get the first question correctly, which is to arbitrarily call one of the two functions not explicitly called in the main path. By the way, this has to be done while running the program without any modifications. I did this by running the program, setting N to 7, which gets me to the Function Pointer of the victim_func frame, I write a[7] with the memory address of confused or shell_call, and it works. (I have a 64 bit machine, thats why I have to get it to 7, since the EBI pointer is 2 ints wide, instead of 1) My question is the following, how could I control which argument gets passed to the shell_code funcion? ie. how do i write a string to char* c. The whole point is executing unix commands like "ps" etc, by running only the program. I figured writing the EBI pointer with the hex representation of "ps" and setting the arg list of shell_call to that, but that didn't work. I also tried inputing argsv arguments and setting the arg list of shell_call to the arg_list of main, but didnt work either. I think the second version should work, but i believe im not setting the arg list of the new stack frame correctly ( I did it by writing a[8] to 0, since its the first part of the functin pointer, and writing a[9]=736c and a[10]=0000, but its probably not right since those are the parameters of victim_func. So how do i access the parameters of shell_call?

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  • ASP.NET - working with GridView Programmatically

    - by JMSA
    I am continuing from this post. After much Googling, I have come up with this code to edit cells programmatically: using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using Ice_Web_Portal.BO; namespace GridView___Test { public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { GridView1.DataSource = Course.GetCourses(); GridView1.DataBind(); } protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) { GridViewRow row = GridView1.Rows[e.NewEditIndex]; GridView1.EditIndex = e.NewEditIndex; GridView1.DataSource = Course.GetCourses(); GridView1.DataBind(); } protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e) { TextBox txtID = (TextBox)GridView1.Rows[e.RowIndex].Cells[1].Controls[0]; TextBox txtCourseCode = (TextBox)GridView1.Rows[e.RowIndex].Cells[2].Controls[0]; TextBox txtCourseName = (TextBox)GridView1.Rows[e.RowIndex].Cells[3].Controls[0]; TextBox txtCourseTextBookCode = (TextBox)GridView1.Rows[e.RowIndex].Cells[4].Controls[0]; Course item = new Course(); item.ID = Convert.ToInt32(txtID.Text); item.CourseCode = txtCourseCode.Text; item.CourseName = txtCourseName.Text; item.TextBookCode = txtCourseTextBookCode.Text; bool success = Course.Update(item); labMessage.Text = success.ToString(); GridView1.EditIndex = -1; GridView1.DataSource = Course.GetCourses(); GridView1.DataBind(); } } } But 2 problems are happening. (1) I need to press command buttons twice to Edit/Update. (2) Changes in the cell values are not updated in the database. I.e. edited cell values are not committing. Can anyone give me a solution?

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  • Boiler plate code replacement - is there anything bad about this code?

    - by Benjol
    I've recently created these two (unrelated) methods to replace lots of boiler-plate code in my winforms application. As far as I can tell, they work ok, but I need some reassurance/advice on whether there are some problems I might be missing. (from memory) static class SafeInvoker { //Utility to avoid boiler-plate InvokeRequired code //Usage: SafeInvoker.Invoke(myCtrl, () => myCtrl.Enabled = false); public static void Invoke(Control ctrl, Action cmd) { if (ctrl.InvokeRequired) ctrl.BeginInvoke(new MethodInvoker(cmd)); else cmd(); } //Replaces OnMyEventRaised boiler-plate code //Usage: SafeInvoker.RaiseEvent(this, MyEventRaised) public static void RaiseEvent(object sender, EventHandler evnt) { var handler = evnt; if (handler != null) handler(sender, EventArgs.Empty); } } EDIT: See related question here UPDATE Following on from deadlock problems (related in this question), I have switched from Invoke to BeginInvoke (see an explanation here). Another Update Regarding the second snippet, I am increasingly inclined to use the 'empty delegate' pattern, which fixes this problem 'at source' by declaring the event directly with an empty handler, like so: event EventHandler MyEventRaised = delegate {};

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  • ListBox item doesn't get refresh in WPF?

    - by sanjeev40084
    I have a listbox which has couple of items. When double clicked on each item, the user get option to edit item (text of item). Now once i update the item, my item in listbox doesn't get updated. The first window (one which has listbox) is in MainWindow.xaml file and second window is in EditTaskView.xaml(one which let's edit the items text) file. The code that displays items in lists is: Main.Windows.cs public static ObservableCollection TaskList; public void GetTask() { TaskList = new ObservableCollection<Task> { new Task("Task1"), new Task("Task2"), new Task("Task3"), new Task("Task4") }; lstBxTask.ItemsSource = TaskList; } private void lstBxTask_MouseDoubleClick(object sender, MouseButtonEventArgs e) { var selectedTask = (Task)lstBxTask.SelectedItem; EditTask.txtBxEditedText.Text = selectedTask.Taskname; EditTask.PreviousTaskText = selectedTask.Taskname; EditTask.Visibility = Visibility.Visible; } The xaml code that displays the list: <ListBox x:Name="lstBxTask" Style="{StaticResource ListBoxItems}" MouseDoubleClick="lstBxTask_MouseDoubleClick"> <ListBox.ItemTemplate> <DataTemplate> <StackPanel> <Rectangle Style="{StaticResource LineBetweenListBox}"/> <StackPanel Orientation="Horizontal"> <TextBlock Text="{Binding Taskname}" Style="{StaticResource TextInListBox}"/> <Button Name="btnDelete" Style="{StaticResource DeleteButton}" Click="btnDelete_Click"/> </StackPanel> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> </ListBox> <ToDoTask:EditTaskView x:Name="EditTask" Grid.Row="1" Grid.RowSpan="2" Grid.ColumnSpan="2" Visibility="Collapsed"/> The Save button in TaskEditView.xaml does this: public string PreviousTaskText { get; set; } private void btnSaveEditedText_Click(object sender, RoutedEventArgs e) { foreach (var t in MainWindow.TaskList) { if (t.Taskname == PreviousTaskText) { t.Taskname = txtBxEditedText.Text; } } Visibility = Visibility.Collapsed; } TaskList is the ObservableCollection, and i though once you update the value the UI gets refreshed. But doesn't seem to work that way. What am i missing?

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  • Android OpenGl Renderer finish event

    - by Eu Vid
    In OpenGL Renderer onDrawFrame is called several time, until the page is completely rendered. I cannot find an event that my page is completeley rendered in order to take a snapshot of the OpenGL page and animate it. I have the solution to take snapshot on at the animation trigger (specific button), but this will imply a specific delay, until Bitmap is created, such as i would like to keep in memory a mutable copy of every page. Do you know other way to animate GLSurfaceView with rendered content? Snippet for triggering snapshot. glSurfaceView.queueEvent(new Runnable() { @Override public void run() { glSurfaceView.getRenderer().takeGlSnapshot(); } }); EGLContext for passing the GL11 object. public void takeGlSnapshot() { EGL10 egl = (EGL10) EGLContext.getEGL(); GL11 gl = (GL11) egl.eglGetCurrentContext().getGL(); takeSnapshot(gl); } onDrawFrame(Gl10 gl) { //is last call for this page event ????????????

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  • Is there a way to delay an event handler (say for 1 sec) in Windows Forms

    - by Essam
    I need to be able to delay the event handlers for some controls (like a button) to be fired for example after 1 sec of the actual event (click event for example) .. is this possible by the .net framework ? I use a timer and call my code from the timer's tick event as below but I am not sure if this is the best approach ! void onButtonClick( ..) { timer1.Enabled = true; } void onTimerTick( ..) { timer.Enabled = false; CallMyCodeNow(); }

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