event-handling

jquery dialog - which button opened the dialog?

In the example below, how can you use the event and ui objects to detect which link opened the dialog? Can't seem to get $(event.target).attr("title"); to work properly, and I'm having trouble finding documentation on the 'ui object that is passed. Thanks! $("#dialog_support_option_form").dialog({ link_title = $(event.target).attr(...

Custom Java events with listeners vs. a JMS based implementation?

My application requires events to be fired based on some specific activities that happen. I'm trying to determine if I should create my own event handling system using the Java EventObject with custom listeners similar to Java AWT Or should I use a JMS implementation? I was considering either apache's Qpid or ActiveMQ solution. I'm ex...

Using ManualResetEvent to wait for multiple Image.ImageOpened events

Dictionary<Image, ManualResetEvent> waitHandleMap = new Dictionary<Image, ManualResetEvent>(); List<Image> images = GetImagesWhichAreAlreadyInVisualTree(); foreach (var image in images) { image.Source = new BitmapImage(new Uri("some_valid_image_url")); waitHandleMap.Add(image, new ManualResetEvent(false)); image.ImageOpened +...

How to deregister an event handler of another object for another object?

I have 3 objects. Object A has an event X that other objects can subscribe to. Object B registers for Object A's X event. How do I deregister Object B from Object A's X event from within Object C? ...

How to get the clicked element in a dynamically built JQuery Treeview?

I have a product database with several product categories. Each category has a number of sub-categories, which has sub-sub-categories, which has... Well, quite some levels deep. The tree is too huge to load at once, so I need to built it dynamically as users select specific product categories. Here's a snapshot of the product tree. Initi...

how to re-enable default after doing event.preventDefault()

Hi, I know this exact question was asked here, but the answer didn't work for what I needed to do so I figured I'd give some example code and explain a bit... $(document).keypress( function (event) { // Pressing Up or Right: Advance to next video if (event.keyCode == 40 || event.keyCode == 39) { event.pr...

GWT removeHandler on first event notification

I want to remove a GWT event handler the first time I receive an event. I also want to avoid polluting my class with tracking registration objects that aren't really necessary. I currently have it coded as: final HandlerRegistration[] registrationRef = new HandlerRegistration[1]; registrationRef[0] = dialog.addFooHandler(new FooHandler(...

Use of 'this' keyword javascript in IE ?

Is there a workaround for Internet Explorer to implement the functionality offered by 'this' javascript keyword to get the dom element that triggered the event? My problem scenario is : I have a variable number of text fields in the html form, like <input type="text" id="11"/> <input type="text" id="12"/> .. I need to handle the...

Why should I implement all event-handling methods, while handling events in a subclass of UIView?

According to the iPhone Application Programming Guide (Event-Handling chapter) I should implement all event-handling methods (even if it is a null implementation), if I work with UIView or UIViewController. And I shouldn't call the superclass implementation of these methods. Why? (I've searched in the Guide and in Google, but can't find...

How do I distinguish a SharePoint file update as being from a file upload?

In SharePoint, when an item is first added to a document library, it fires the ItemAdded and ItemAdding events as expected. And if you upload the same filename to update the existing file, it will fire off ItemUpdated and ItemUpdating events, likewise as expected. However, I have been unsuccessful at determining whether this kind of acti...

attachEvent inserts events at the begin of the queue while addEventListener appends events to the queue

I use this simple working function to add events: function AppendEvent(html_element, event_name, event_function) { if(html_element) { if(html_element.attachEvent) //IE html_element.attachEvent("on" + event_name, event_function); else if(html_element.addEventListener) //FF html_element.addEventListe...

Simple javascript to mimic jQuery behaviour of using this in events handlers

This is not a question about jQuery, but about how jQuery implements such a behaviour. In jQuery you can do this: $('#some_link_id').click(function() { alert(this.tagName); //displays 'A' }) could someone explain in general terms (no need you to write code) how do they obtain to pass the event's caller html elments (a link in thi...

Assign delegate event handler from dynamically added child control

I have a control that handles commenting. In this control, I have set a delegate event handler for sending an email. I then have various types of controls, e.g. blog, articles etc, each of which may or may not have the commenting control added (which is done dynamically with me not knowing the id's), i.e. the commenting control is adde...

[c++] accessing the hidden 'this' pointer

I have a GUI architecture wherein elements fire events like so: guiManager->fireEvent(BUTTON_CLICKED, this); Every single event fired passes 'this' as the caller of the event. There is never a time I dont want to pass 'this', and further, no pointer except for 'this' should ever be passed. This brings me to a problem: How can I asse...

doubt regarding carrying data in custom events using actionscript

Hi I am working on actionscript to generate a SWF dynamically using JSON data coming from an HTTP request. I receive the data on creationComplete and try to generate a tree like structure. I don’t create the whole tree at the same time. I create 2 levels, level 1 and level 2. My goal is to attach custom events on the panels which represe...

vlc python bindings - how to receive keyboard input?

I'm trying to use VLC's python bindings to create my own little video player. The demo implementation is quite simple and nice, but it requires all the keyboard commands to be typed into the console from which the script was run. Is there any way I can handle keyboard input also when the video player itself has focus? Specifically, I ca...

In GWT, how to known from a SelectionEvent in a Tree if the Shift button is pressed

Hi, I try in GWT to create a Tree with multiple selection for the nodes and ran into a problem similar to this question http://stackoverflow.com/questions/1411752/shift-key-in-gwt. When a selectionEvent is raised from the Tree, I would like to know if the Shift key is pressed or not. SelectionHandler<TreeItem> getSelectionHandler() { ...

How to get mouseposition when context menu appears?

Hi. I have a panel which holds many pictureboxes. Each picturebox has registered "contextRightMenu" as their context menu. What i want when the context menu pops up is to get the current mouseposition. I have tried getting the mouseposition by using mouseDown and click, but these events happens after one of the items of the context me...

How to get the current eventNumber for creating an event with NSEvent

Hello I'm creating an os x application for which I try to add a remote interface. For this I need to be able to send mouse down and mouse up commands to the window of my application. I found code with which I can successfully do this, it looks as follows: int mask = 0x100; NSEvent* eventMouseDown = [NSEvent mouseEventWithType:NSLeftMou...

Hooking a synchronous event handler on a form submit button in JS

Hi, I'm working on a security project in javascript (something I honestly have not used), and I'm having some trouble with EventListeners. My code looks something like this: function prevclick(evt) { evt.preventDefault(); document.loginform.submitbtn.removeEventListener('click',prevclick,false); var req = new XMLHttpRequest(); req.open...