event-handling

keyUp event heard?: Overridden NSView method

UPDATED: I'm now overriding the NSView keyUp method from a NSView subclass set to first responder like below, but am still not seeing evidence that it is being called. @implementation svsView - (BOOL)acceptsFirstResponder { return YES; } - (void)keyUp:(NSEvent *)event { //--do key up stuff-- NSLog(@"key up'd!"); } @end --OR...

Ctrl key press condition in WPF MouseLeftButtonDown event-handler

How I can add additional condition of certain keyboard key, say, Ctrl-key state to WPF MouseLeftButtonDown event-handler? private void Grid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { ... } ...

Simplify AS3 binding/event-dispatching code

There are 3 properties (example 1): [Bindable] public var name:String; [Bindable] public var email:Number; [Bindable] public var address:Boolean; I needed to have 3 helper methods that will be bindable too (example 2): [Bindable] public var name:String; [Bindable] public var email:Number; [Bindable] public var address:Boolean; publi...

How to handle touch events on UI Controls

Hi, I have a query related to Touch events on the UI controls. I have 4 controls on the screen ( UITextField, UISlider, UISwitch, UIButton ). If the user touches any of the control on the screen, I want to fire touchesBegan and touchesEnded events on those controls in which I would implement some code. Please let me know how to fire ...

How can I pass a custom argument to an event listener in JavaScript?

How can I add an event listener (addEventListener(),attachEvent()) that also accepts a parameter? The parameter is passed as the element's custom attribute like: <img src="icon.gif" alt="Test button" command="test" /> <img src="icon2.gif" alt="Test button2" command="write" /> ...

ListBox with DoubleClick on Items using DataTemplate

Hello, i want to know a double-clicking functionality for a list-box kann easily be build. I have a list-box with a collection as ItemSource. The collection contains own data-types. <ListBox ItemsSource="{Binding Path=Templates}" ItemTemplate="{StaticResource fileTemplate}"> I defined a data-template for my Items, which con...

How to prevent subscribers to an event from conflicting with each other?

Say I have an event with 2 subscribers (everything occurs in the same thread) - one subscriber writes to a log file, the other shows a MessageBox. If the MessageBox is the first on the subscription list, then the log entry is not written until the after the user closes the message box. So the time in the log entry will really be the ti...

How can I pass addition parameters to my centralized event handlers?

In a WPF application, I've got my events centralized in one class like this: public class EventFactory { public static void Button_Edit_Click(object sender, RoutedEventArgs e) { MessageBox.Show("you clicked edit"); } public static void Button_Add_Click(object sender, RoutedEventArgs e) { MessageBox.S...

Sharepoint 2010 Email Event Receiver not firing?

I have two event recievers setup on a list in 2010. The first is a ItemAdded reciever that works every time: <?xml version="1.0" encoding="utf-8"?> <Elements xmlns="http://schemas.microsoft.com/sharepoint/"&gt; <Receivers ListTemplateId="10000"> <Receiver> <Name>ListItemReceiverItemAdding</Name> <Type>ItemAdding...

Fire event when switching stacks of StackLayoutPanel in GWT 2.0

I'm trying to catch an event, when I switch the stacks of a StackLayoutPanel in GWT 2.0. The biggest problem is that I don't know which event gets fired and there seems to be no documentation, I have added a ChangeHandler with addDomHandler() but that hasn't worked. Unfortunately the StackLayoutPanel doesn't implement the getSelectedInde...

Slow button response in WPF app.

For my WPF application I have developed a virtual keyboard. It runs fine on my development machine. However, on slower machines the button click response is slow. After the button is clicked, there is a delay before the display updates with the button down state and the buttons event. What can I do to remove this delay? Is the problem a ...

How can a shared event handler know which control's event it's handling?

I want to write some code that assigns the same event handler to several different buttons. Is there a way to implement it without referring to each button by name but by using something generic like self or sender to refer to the button? ...

Delphi OnClick Problem with Multiple Units

When I make a dynamic component from unit I have no problem creating the OnClick event. When I make a dynamic component from unit 2 I am unable to access the OnClick event. unit Unit1 type TForm1 = class(TForm) procedure FormCreate(Sender: TObject); private { Private declarations } public Proc...

Add event handler dynamically having the delegate name in a string

Hi! I need to assign an eventHandler to an object, in this way: _Element.AddHandler(UIElement.MouseLeftButtonUpEvent, new RoutedEventHandler(Vars.Digit), true); but, in fact, I only have a string that contains "Digit" or other method name in the Vars object instance. It is possible to achieve this using reflection or other kind of t...

WPF: How to prevent a control from stealing a key gesture?

In my WPF application I would like to attach an input gesture to a command so that the input gesture is globally available in the main window, no matter which control has the focus. In my case I would like to bind Key.PageDown to a command, however, as soon as certain controls receive the focus (e.g. a TextBox or TreeView control), thes...

Handling wpf control events in the ViewModel

Is there an alternative to Attached Command Behaviour for handling events like DataGrid's MouseDoubleClick event, or TextBox's LostFocus event in the ViewModel ? e.g., View:: <Window ........ DataContext="......."> <TextBox LostFocus="{Binding Command1}" /> <! -- or --> <WpfToolkit:DataGrid...

How to make addValueChangeHandler act just like addChangeHandler

Hi. I have a problem. I made a wrap widget that implements interface HasChangeHandlers But i just can't fit events to each other. public HandlerRegistration addChangeHandler( final ChangeHandler handler ) { HandlerRegistration registration1 = dateFrom.addValueChangeHandler( handler );// Compile error HandlerRegistration registration...

Pitfalls of Event Handling in Java

I'm working on a program that needs a Java object to have an event. I'm quite familiar with how this works in C#, having had enough experience to learn the pitfalls. What are the pitfalls of working with events in Java? How are they different from events in C# 2.0? Example: An object changed event to prompt a save from the owner ob...

How Do I Get an Object to Listen For its Property's Event?

I have an object of type SomeObject, with an event StatusChanged. I have a property in SomeObject of type Status also with an event StatusChanged. Within a private function in SomeObject, I would like to run some logic (including firing the StatusChanged event) in the event that Status has fired its StatusChanged event. I have been a...

AS3 - Dispatch an Event DOWN the display list (instead of up)

Consider this (psuedo-code): var country = new Country(); addChild(country); var state = new State(); country.addChild(state); var city = new City(); state.addChild(city); I can dispatch events from the city up to the country like this (in the City class): dispatchEvent(new CustomEvent(CustomEvent.WHATEVER)); Because events bubbl...