event-handling

问题 In VB .NET, when you call RaiseEvent X(), is the function that handles the event X processed asynchronously or synchronously. I was under the impression that RaiseEvent and the processing of the event were Synchronous unless created explictly on another thread. I've been told otherwise though. 回答1: Events are raised synchronously by default. Since MulticastDelegates are designed to support asynchronous invocation it is possible to invoke the delegates in an event's invocation list

问题 I registered a listener to a RelativeLayout, see below. I'd like to add some custom event handling, mOnTouchListener = new OnTouchListener() { @Override public boolean onTouch(View view, MotionEvent motionEvent) { final int action = motionEvent.getAction(); boolean ret = false; switch (action) { case MotionEvent.ACTION_DOWN: ret = doSth(motionEvent); break; case MotionEvent.ACTION_MOVE: ret = doSth(motionEvent); break; case MotionEvent.ACTION_UP: ret = doSth(motionEvent); break; } return ret;

问题 I'm writing a small 2D engine that uses Lua to control it. I've been setting events up in between the Lua and the VB.net for the past little while here. The problem, I've realized, is that is that I can't seem to remove the events which is screwing up quite a few things (because they are being called when they should be done with). To fix this, I wanted to add some kind of way to remove the specific event handler. I know how to add an event handler: AddHandler Button1.Click, AddressOf

问题 How can I handle two buttons pressed simultaneously ('Ctrl' + 'C'), not in the WindowsForms application, but in console C# application? 回答1: I suspect you want to set Console.TreatCtrlCAsInput to true . (Assuming you don't want this to terminate the app.) 回答2: Check out Console.TreatControlCAsInput property; Gets or sets a value indicating whether the combination of the Control modifier key and C console key (Ctrl+C) is treated as ordinary input or as an interruption that is handled by the

问题 I have some radionButtons in groupBox and I need to do action what I could call "one of radiobuttons.checked changed" or find out from radiobutton what index is changed. I've tryed to find it in list of events but I couldn't find the right one. Edit: To make it more clear: I need to know if exist some handel for what I'll write handler method for the goupBox not for single radioButton. I know how to use radiButton.checkedChanged, but it's not what I'm finding .. Or differently I need to know

问题 This has been on my mind for a few days now. As per the docs, React has synthetic event system, which is a a cross-browser wrapper around the browser's native event . Going through the docs, is my understanding correct that the custom (synthetic) event system, isn't about efficiency but rather cross-browser compatibility. In other words, React still appends the event to the element rather than the more efficient approach of event-delegation on the parent element? I also noticed this in

问题 Most code I have seen uses the following way to declare and invoke event firing: public class MyExample { public event Action MyEvent; // could be an event EventHandler<EventArgs>, too private void OnMyEvent() { var handler = this.MyEvent; // copy before access (to aviod race cond.) if (handler != null) { handler(); } } public void DoSomeThingsAndFireEvent() { // ... doing some things here OnMyEvent(); } } Even ReSharper generates an invoking method the way mentioned above. Why not just do it

问题 I have this input hidden: <input id="j_idt26:myValue" type="hidden" name="j_idt26:myValue" value="0?100?"> I want to alert "hey" the first time the value is set and then every time it changes. I have something like this: $(document).ready(function(){ var $hello= $('[id$=myValue]'); $hello.bind("change load", function(){ alert('hey'); }); }); But nothing is showing up. If you can help Thanks 回答1: $(function(){ var $hello= $('[id$="myValue"]'); $hello.on("change", function(){ //bind() for older

问题 I have a form in MS Access which has an image. The image has an Click event which opens a modal form. The modal form has an OK and Cancel button. When you click the OK button, an event is supposed to fire which tells the main form which button was clicked. (This is to simulate the DialogResult functionality in C#). However, the code in the event handler never runs. The modal form has the following in the general declarations: Public Event OnDialogBoxClose(NewRecordID As Long, DialogResult As

问题 I have a form in MS Access which has an image. The image has an Click event which opens a modal form. The modal form has an OK and Cancel button. When you click the OK button, an event is supposed to fire which tells the main form which button was clicked. (This is to simulate the DialogResult functionality in C#). However, the code in the event handler never runs. The modal form has the following in the general declarations: Public Event OnDialogBoxClose(NewRecordID As Long, DialogResult As