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• Get window handle from window class name

  - by Einar Egilsson

  I'm trying to get a window handle on a child window in my process and the only information I have is the window class name. Are there any win32 functions I can use for that? I'm doing this from C#. A bit more detail: This is a Visual Studio plugin, written in C#. So my process is visual studio, which has lots of windows. One of them has a window class "VsTipWindow". I don't know the immediate parent window of that window, all I have is the class name. Is there any way for me to get the window handle from just that?

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• Unit Testing in QTestLib - running single test / tests in class / all tests

  - by Dave

  I'm just starting to use QTestLib. I have gone through the manual and tutorial. Although I understand how to create tests, I'm just not getting how to make those tests convenient to run. My unit test background is NUnit and MSTest. In those environments, it was trivial (using a GUI, at least) to alternate between running a single test, or all tests in a single test class, or all tests in the entire project, just by clicking the right button. All I'm seeing in QTestLib is either you use the QTEST_MAIN macro to run the tests in a single class, then compile and test each file separately; or use QTest::qExec() in main() to define which objects to test, and then manually change that and recompile when you want to add/remove test classes. I'm sure I'm missing something. I'd like to be able to easily: Run a single test method Run the tests in an entire class Run all tests Any of those would call the appropriate setup / teardown functions.

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• Why don't these class attributes register?

  - by slypete

  I have a factory method that generates django form classes like so: def get_indicator_form(indicator, patient): class IndicatorForm(forms.Form): #These don't work! indicator_id = forms.IntegerField(initial=indicator.id, widget=forms.HiddenInput()) patient_id = forms.IntegerField(initial=patient.id, widget=forms.HiddenInput()) def __init__(self, *args, **kwargs): forms.Form.__init__(self, *args, **kwargs) self.indicator = indicator self.patient = patient #These do! setattr(IndicatorForm, 'indicator_id', forms.IntegerField(initial=indicator.id, widget=forms.HiddenInput())) setattr(IndicatorForm, 'patient_id', forms.IntegerField(initial=patient.id, widget=forms.HiddenInput())) for field in indicator.indicatorfield_set.all(): setattr(IndicatorForm, field.name, copy(field.get_field_type())) return type('IndicatorForm', (forms.Form,), dict(IndicatorForm.__dict__)) I'm trying to understand why the top form field declarations don't work, but the setattr method below does work. I'm fairly new to python, so I suspect it's some language feature that I'm misunderstanding. Can you help me understand why the field declarations at the top of the class don't add the fields to the class? In a possibly related note, when these classes are instantiated, instance.media returns nothing even though some fields have widgets with associated media. Thanks, Pete

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• Clear all class variables between instances

  - by ensnare

  This is probably a stupid question, but what's the best way to clear class variables between instances? I know I could reset each variable individually in the constructor; but is there a way to do this in bulk? Or am I doing something totally wrong that requires a different approach? Thanks for helping ... class User(): def __init__(self): #RESET ALL CLASS VARIABLES def commit(self): #Commit variables to database >>u = User() >>u.name = 'Jason' >>u.email = '[email protected]' >>u.commit() So that each time User is called the variables are fresh. Thanks.

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• Static Member Variables of the Same Class in C++

  - by helixed

  I'm trying to create a class which contains a static pointer to an instance of itself. Here's an example: A.h: #include <iostream> #ifndef _A_H #define _A_H class A { static A * a; }; A * a = NULL; #endif However, when I include A.h in another file, such as: #include "A.h" class B { }; I get the following error: ld: duplicate symbol _a in /Users/helixed/Desktop/Example/build/Example.build/Debug/Example.build/Objects-normal/x86_64/B.o and /Users/helixed/Desktop/Example/build/Example.build/Debug/Examplebuild/Objects-normal/x86_64/A.o I'm using the Xcode default compiler on Mac OS X Snow Leopard. Thanks, helixed

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• reference parent class function in AS 3.0

  - by vasion

  I am trying to run a function of the main class, but even with casting it does not work. I get this error TypeError: Error #1009: Cannot access a property or method of a null object reference. at rpflash.communication::RPXMLReader/updateplaylist() at rpflash.communication::RPXMLReader/dataHandler() at flash.events::EventDispatcher/dispatchEventFunction() at flash.events::EventDispatcher/dispatchEvent() at flash.net::XMLSocket/scanAndSendEvent() this is the main class code package{ import flash.display.MovieClip; import rpflash.communication.RPXMLReader; public class Main extends MovieClip{ var reader:RPXMLReader = new RPXMLReader(); public function Main(){ trace('Main actionscript loaded'); } public function test(){ trace('test worked');} } } and this is the function trying to call it: private function updateplaylist(){ //xml to string var xmls:String= xml.toXMLString(); trace('playlist updated debug point'); MovieClip(this.parent).test();} what am i doing wrong?

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• Accessing super class function using subclass object

  - by bdhar

  I have an object for a subclass who is of it's superclass type. There is a overridden function in subclass which gets executed when called using the object. How to call the parent's function using the same object? Is there any way to achieve this? package supercall; public class Main { public static void main(String[] args) { SomeClass obj = new SubClass(); obj.go(); } } class SomeClass { SomeClass() { } public void go() { System.out.println("Someclass go"); } } class SubClass extends SomeClass { SubClass() { } @Override public void go() { System.out.println("Subclass go"); } } Consider the code above. Here it prints Subclass go . Instead I have to print Superclass go .

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• Is WPF Decorator class useful?

  - by darja

  I need to create control to draw border around its child. So, I have created class and derived it from Decorator: class RoundedBoxDecorator : Decorator { protected override Size ArrangeOverride(Size arrangeSize) { //some source } protected override void OnRender(DrawingContext dc) { //some source } } It works fine, but I have some doubts about using Decorator as ancestor. I have found in MSDN that there are no special methods or properties in it, only derived from its ancestors (UIElement or FrameworkElement). ArrangeOverride and OnRender are also derived. So, what for Decorator class was designed and does it makes sense to use it? Or I can derive from FrameworkElement?

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• Simple Properties in Objective-C Classes

  - by tarnfeld

  Hey, I've bene working with Objective-C for a while now, and so far I have never really needed to craft my own classes, properly. I am a bit confused with the two arguments you can give the @property(a, b) declaration in a header file. When creating outlets to Interface Builder I usually do @property(nonatomic, retain) but I have no idea what this means. I'm writing a simple class which has a set of properties which will be set from the outside, like [instance setName:@"Bla Bla Bla"]; or I guess like instance.name = @"Bla@" but I would rather the first option. How would I declare this kind of property on a class? Thanks in advanced! Sorry for the n00bish question :-)

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• ActionScript 3 class over several files - how?

  - by Poni

  So, how do we write a class over several files in action script 3? In C# there's the "partial" keyword. In C++ it's natural (you just "#include ..." all files). In Flex 3, in a component, you add this tag: <mx:Script source="myfile.as"/>. How do I split the following class into several files; package package_path { public class cSplitMeClass { public function cSplitMeClass() { } public function doX():void { // .... } public function doY():void { // .... } } } For example I want to have the doX() and doY() functions implemented in another ".as" file. Can I do this? And please, don't tell me something like "a good practice is to have them in one file" :)

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• jquery li with image fade in background (fade in class)

  - by steve

  I'm currently using this code: var gallery = $('ul#gallery').children(); $(gallery).filter(':even').not(':last').hover(function () {$(this).toggleClass('next')}); I'm trying to make it fade this new class in. Currently, there's an <li> with an image in it, no background. When the 'next' class is added, it gives it a background image when hovered over. Is there a way to just fade in the new class without making the image blink/fade at all? Thanks.

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• HttpContext.Current.Request.UserHostName is empty when called from a class

  - by John Galt

  I have various web pages that need to build up a URL to display or place it in an emitted email message. The code I inherited had this value for the name of the webserver in a Public Const in a Public Class called FixedConstants. For example: Public Const cdServerName As String = "WEBSERVERNAME" Trying to improve on this, I wrote this: Public Class UIFunction Public Shared myhttpcontext As HttpContext Public Shared Function cdWebServer() As String Dim s As New StringBuilder("http://") Dim h As String h = String.Empty Try h = Current.Request.ServerVariables("REMOTE_HOST").ToString() Catch ex As Exception Dim m As String m = ex.Message.ToString() 'Ignore this should-not-occur thingy End Try If h = String.Empty Then h = "SomeWebServer" End If s.Append(h) s.Append("/") Return s.ToString() End Function I've tried different things while debugging such as HttpContext.Current.Request.UserHostName and I always get an empty string which pumps out my default string "SomeWebServer". I know Request.UserHostName or Request.ServerVariables("REMOTE_HOST") works when invoked from a page but why does this return empty when invoked from a called method of a class file (i.e. UIFunction.vb)?

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• forwarding a notification to another class

  - by Mike

  I am using this method - (void)keyboardWillShow:(NSNotification *)notification that is triggered when the keyboard shows. When this method is triggered, it receives a notification that contains several parameters about the keyboard, as the animation duration, animation curve and frame. I need to forward this notification and all its parameters to another class. So, I've tried to do this inside keyboardWillShow: [[NSNotificationCenter defaultCenter] postNotificationName:@"doSomething" object:notification userInfo:nil]; the doSomething notification runs doSomething method on another class, and it has this form: - (void) doSomething:(NSNotification *)notification { but when I try to read the notification values on this other class, using, for example, myRect = [[[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue]; I obtain zero for all values. The notification is losing its parameters and not being forwarded. How can I do that? thanks.

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• How to access web application class into silverlight application

  - by Srikanth

  Hi..I am beginner in silverlight..I have created a silverlight project. When a new silverlight project is created it is automatically creating a silverlight application and one web application. I have added a class in both applications. Now I want to access a method of web application class into silverlight application class. Is it possible? I have tried to add web application reference to silverlight but VS is not allowing. Is there any another way to do??

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• Expected ')' before '*' token

  - by Danni

  So this is more of a syntax problem. I keep getting the error "Expected ')' before '*' token" on the line: #include "CDocumentObserver.h" #include "CViewPlayerDlg.h" /* * Class: CViewPlayer * */ class CViewPlayer : public wxWindow, public CDocumentObserver { public: CViewPlayer(CViewPlayerDlg *dlg); //here in CViewPLayer.h. The .cpp constructor looks like: #include "CViewPlayer.h" #include "wx/prec.h" #include "CViewPlayerDlg.h" using namespace std; BEGIN_EVENT_TABLE(CViewPlayer, wxWindow) EVT_PAINT(CViewPlayer::OnPaint) END_EVENT_TABLE() CViewPlayer::CViewPlayer(CViewPlayerDlg *dlg) : wxWindow(dlg, wxID_ANY, wxDefaultPosition, wxSize(dlg->GetDocument()->GetSize()), wxBORDER_SUNKEN), CDocumentObserver(dlg->GetDocument()), mStartTime(0), mPlayTime(0), mPlaying(false) { SetBackgroundColour(wxColour(128, 128, 128)); SetClientSize(GetDocument()->GetSize()); } What causes this error? I thought it was that something was wrong in the constructor of the .cpp but I have no idea. Dianna

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• Allow run-time configuration of web service url using ATL soap and sproxy-generated proxy class

  - by Odrade

  I have a Visual C++ application that communicates with an ASP.NET web service via ATL Soap. The client application uses an sproxy-generated proxy class for the communication. Looking at the generated proxy class, I noticed that the url for the web service is hard-coded in numerous places. It would be preferable for the url to be configurable at run-time (e.g. stored in a config file). Could anyone recommend a method for doing this? It doesn't look like the class generated by sproxy is amenable to hand-editing.

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• CSS selector for the last occurrence of a class on a page

  - by snaken

  Is there a CSS selector for the last occurrence of a class on a page? Say i have this HTML <dd> <span> <a class="required" id="forename">foo</a> </span> </dd> <dd> <span> <a class="required" id="surname">bar</a> </span> </dd> Is there a CSS selector that would return the a tag with the ID of surname. Something like .required:last maybe? Will be using Prototype if that matters?

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• C# xml serializer - Unable to generate a temporary class

  - by gosom

  I am trying to serialize an xml to a class with the following way: XmlSerializer ser = new XmlSerializer(typeof(PSW5ns.PSW5)); StringReader stringReader; stringReader = new StringReader(response_xml); XmlTextReader xmlReader; xmlReader = new XmlTextReader(stringReader); PSW5ns.PSW5 obj; obj = (PSW5ns.PSW5)ser.Deserialize(xmlReader); xmlReader.Close(); stringReader.Close(); the class PSW5 is generated automatically by xsd.exe using an PSW5.xsd file given to me. I have done the same for other classes and it works. Now i get the following error (during runtime) : {"Unable to generate a temporary class (result=1).\r\nerror CS0030: Cannot convert type 'PSW5ns.TAX_INF[]' to 'PSW5ns.TAX_INF'\r\nerror CS0029: Cannot implicitly convert type 'PSW5ns.TAX_INF' to 'PSW5ns.TAX_INF[]'\r\n"} I am confused because it works for other classes the same way. I would appreciate any suggestions. Thanks inadvance, Giorgos

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• Validating class and superclass on RoR

  - by Luís Guilherme

  In ruby, you have an attribute called "type" which is the class of the object. Rails stores this at the database in a column called type. So, if I have several blog "types", I can do something like this def create @blog = Blog.new(params[:blog]) @blog[:type] = params[:blog][:type] # ... end If I add someone like this, and then load it, and ask its class (for instance, at the console), I have the right class name answered back. However, when I save it afterwards, rails will run only the superclass validators, not the ones I defined in the subclass. How should I make rails run the subclass validators?

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• Why isn't the static constructor of the parent class called when invoking a method on a nested class

  - by Ryan Ische

  Given the following code, why isn't the static constructor of "Outer" called after the first line of "Main"? namespace StaticTester { class Program { static void Main( string[] args ) { Outer.Inner.Go(); Console.WriteLine(); Outer.Go(); Console.ReadLine(); } } public static partial class Outer { static Outer() { Console.Write( "In Outer's static constructor\n" ); } public static void Go() { Console.Write( "Outer Go\n" ); } public static class Inner { static Inner() { Console.Write( "In Inner's static constructor\n" ); } public static void Go() { Console.Write( "Inner Go\n" ); } } } }

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• Good way to edit the previous defined class in ipython

  - by leo

  Hi, I am wondering a good way to follow if i would like to redefine the members of a previous defined class in ipython. say : I have defined a class intro like below, and later i want to redefine part of the function definition _print_api. Any way to do that without retyping it . class intro(object): def _print_api(self,obj): def _print(key): if key.startswith('_'): return '' value = getattr(obj,key) if not hasattr(value,im_func): doc = type(valuee).__name__ else: if value.__doc__ is None: doc = 'no docstring' else: doc = value.__doc__ return ' %s :%s' %(key,doc) res = [_print(element) for element in dir(obj)] return '\n'.join([element for element in res if element != '']) def __get__(self,instance,klass): if instance is not None: return self._print(instance) else: return self._print_api(klass)

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• How can I get VS2008 winforms designer to render a Form that implements an abstract base class

  - by BeowulfOF

  Hi, I engadged a problem with inherited Controls in WinForms, and need some advice on it. I do use a base class for items in a List (selfmade GUI list made of a panel) and some inherited controls that are for each type of data that could be added to the list. There was no problem with it, but I know found out, that it would be right, to make the base-control an abstract class, since it has methods, that need to be implemented in all inherited controls, called from the code inside the base-control, but must not and can not be implemented in the base class. When I mark the base-control as abstract, the VS2008 Designer refuses to load the window. Is there any way to get the Designer work with the base-control made abstract?

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• static arrays defined with unspecified size, empty brackets?

  - by ahmadabdolkader

  For the C++ code fragment below: class Foo { int a[]; // no error }; int a[]; // error: storage size of 'a' isn't known void bar() { int a[]; // error: storage size of 'a' isn't known } why isn't the member variable causing an error too? and what is the meaning of this member variable? I'm using gcc version 3.4.5 (mingw-vista special) through CodeBlocks 8.02. On Visual Studio Express 2008 - Microsoft(R) C/C++ Optimizing Compiler 15.00.30729.01 for 80x86, I got the following messages: class Foo { int a[]; // warning C4200: nonstandard extension used : zero-sized array in struct/union - Cannot generate copy-ctor or copy-assignment operator when UDT contains a zero-sized array }; int a[]; void bar() { int a[]; // error C2133: 'a' : unknown size } Now, this needs some explaination too.

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• Returning in a static initializer

  - by Martijn Courteaux

  Hello, This isn't valid code: public class MyClass { private static boolean yesNo = false; static { if (yesNo) { System.out.println("Yes"); return; // The return statement is the problem } System.exit(0); } } This is a stupid example, but in a static class constructor we can't return;. Why? Are there good reasons for this? Does someone know something more about this? So the reason why I should do return is to end constructing there. Thanks

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• Referring to the type of an inner class in Scala

  - by saucisson

  The following code tries to mimic Polymorphic Embedding of DSLs: rather than giving the behavior in Inner, it is encoded in the useInner method of its enclosing class. I added the enclosing method so that user has only to keep a reference to Inner instances, but can always get their enclosing instance. By doing this, all Inner instances from a specific Outer instance are bound to only one behavior (but it is wanted here). abstract class Outer { sealed class Inner { def enclosing = Outer.this } def useInner(x:Inner) : Boolean } def toBoolean(x:Outer#Inner) : Boolean = x.enclosing.useInner(x) It does not compile and scala 2.8 complains about: type mismatch; found: sandbox.Outer#Inner required: _81.Inner where val _81:sandbox.Outer From Programming Scala: Nested classes and A Tour of Scala: Inner Classes, it seems to me that the problem is that useInnerexpects as argument an Inner instance from a specific Outer instance. What is the true explanation and how to solve this problem ?

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