event-handling

I have this class where I am using a combination of jQuery and Prototype : var MyClass = Class.create({ initElements: function(sumEl) { this.sumEl = sumEl; sumEl.keyup(this.updateSumHandler); }, updateSumHandler: function(event) { // Throws error here: "this.updateSum is not a function" this.updateSum(); }, updateSum: function() { // does something here } }); How can I call this.updateSum() after all? You need to use closures. initElements: function(sumEl) { this.sumEl = sumEl; var ref = this; sumEl.keyup( function(){ref.updateSumHandler();}); }, Martijn Laarman Totally untested suggestion:

In my C# project, I am creating a Hangman game that has a set of buttons which contains the alphabets from A to Z. All these buttons when clicked will execute the same method. I do not want to create an event handler for each of them one by one. So how do I create a SINGLE event handler for all these buttons? Subscribe same handler for all buttons and use sender to get button which raised event: void Button_Click(object sender, EventArgs e) { Button button = (Button)sender; // use Name or Tag of button } If your buttons named as alphabets A .. Z then you can just use button.Name to get letter.

Is there a way to find all event handlers for a Windows Forms control? Specifically statically defined event handlers? Hans Passant Windows Forms has strong counter-measures against doing this. Most controls store the event handler reference in a list that requires a secret 'cookie'. The cookie value is dynamically created, you cannot guess it up front. Reflection is a backdoor, you have to know the cookie variable name. The one for the Control.Click event is named "EventClick" for example, you can see this in the Reference Source or with Reflector. This is all incredibly unpractical, if you

Is there a way to listen for typing into the browser's "find" window in JavaScript? I'd like to be able to reinterpret the search text from JavaScript. What do I need to add an event listener for? I don't know of any way you can listen for a find -like event and if that's supported in any browser it sure isn't a portable solution. I also don't know what you're trying to achieve but I think that your best option is to listen for the keyboard events that trigger the find window and attempt to cancel them while attempting to emulate the find-toolbar/window with JavaScript of your own. This is

So I've tried the MSAPI 5.4 TTS with event example . Now I create an cmd prompt app that utilize the SetNotifyCallbackFunction but the function that I've pass is not being called. I'm not an expert in C++ so I am having difficulty in solving this one, can anyone point me in the right direction or at least give me a good example of SetNotifyCallbackFunction? Here is a simplified version of my code: typedef void __stdcall SPNOTIFYCALLBACK(WPARAM wParam, LPARAM lParam); void __stdcall outsideeventFunction(WPARAM, LPARAM); void __stdcall outsideeventFunction(WPARAM wParam, LPARAM lParam){ std:

Is there a correct way to solve the problem with event propagation between two sibling panes? For example we have StackPane with 2 panes inside. StackPane p = new StackPane(); Region p1 = new Region(); Region p2 = new Region(); p.getChildren().addAll(p1, p2); p2 in this example capture mouse events and p1 can't react on it even if event is not consumed. Is there a correct way to propagate event to p1 if it not consumed by p2? setMouseTransparent not solve my problem because I need that both children elements react on mouse. Thanks for advise. By default events will just propagate up the

In C#, I could do something like this: EventHandler handler = this.SomeEvent; ...which would allow me to, for example, do: Delegate[] attachedHandlers = handler.GetInvocationList(); In VB.NET, I can't seem to figure out how to do a similar thing. This doesn't work: Dim handler As EventHandler = Me.SomeEvent ...due to the following error: Public Event SomeEvent(sender As Object, e As EventArgs)' is an event, and cannot be called directly. Use a 'RaiseEvent' statement to raise an event. But this doesn't work either: Dim handler As EventHandler = AddressOf Me.SomeEvent ...because: 'AddressOf'