event-handling

问题 I found tons of posts about handling events of existing java classes, but nothing about creating a class with events from scratch. What is the translation to java of this vb.net snippet? Public Class TestClass Event TestEvent() Sub TestFunction() RaiseEvent TestEvent() End Sub End Class Public Class Form1 Dim WithEvents TC As New TestClass Sub OnTestEvent() Handles TC.TestEvent End Sub End Class Thanks. 回答1: Here's a good link on the "theory" behind the Java event model: http://docs.oracle

问题 I'm trying to register handler for all Loaded events: EventManager.RegisterClassHandler(typeof(UIElement), FrameworkElement.LoadedEvent, new RoutedEventHandler(OnRoutedEvent), true); EventManager.RegisterClassHandler(typeof(ContentElement), FrameworkContentElement.LoadedEvent, new RoutedEventHandler(OnRoutedEvent), true); EventManager.RegisterClassHandler(typeof(UIElement), FrameworkElement.UnloadedEvent, new RoutedEventHandler(OnRoutedEvent), true); EventManager.RegisterClassHandler(typeof

问题 In my cocos2d game I have a "Settings" button which launches a modal layer and is meant to lock everything under it. To do this, I use a combination of a menu status method which locks all CCMenuItems and I use a coverlayer; both of which are below in code. The problem is that neither solution seems to work on CCScrollLayers. When I click the button (which launches the modal) the CCScrollLayer can still be scrolled which is not what i want. I'd like to: Press a button disabled ALL touches and

问题 This is a C# question. I have a user control A. A contains another user control B. B has an event called BEvent. I want to expose this event in A so anyone who uses control A can subscribe BEvent. How can I write code to implement this design? Thanks. 回答1: Inside your user control A you could expose the event of control B like this... public event EventHandler EventA { add { _control.EventB += value; } remove { _control.EventB -= value; } } You should look at the delegate which event B is

问题 I have the following code: var myObj = { inputs: document.getElementsByTagName('input'), attachKeyEvent: function() { for ( var i = 0; i < this.inputs.length; i++ ) { this.inputs[i].onkeypress = this.getChar; console.log(this); // => returns ref to myObj } }, getChar: function(e) { console.log(this); // => [Object HTMLInputElement] // get a reference to myObj } } I have a DOM structure with a couple of <input type="text" /> elements. I need to write a couple of methods to enhance the key

问题 I encountered a question to which I didn't know the solution for. Suppose I have this HTML markup (dynamically generated by the server or simply a static file): <ul class="myList"> <li><a href="page1.html">Page 1</a></li> <li><a href="page2.html">Page 2</a></li> <li><a href="page3.html">Page 3</a></li> <li><a href="page4.html">Page 4</a></li> <li><a href="page5.html">Page 5</a></li> <li><a href="page6.html">Page 6</a></li> <!-- ... --> <li><a href="page1000.html">Page 1000</a></li> </ul> I

问题 I have a user control. I had this situations again some times but could always fix it by using the " New() contructor". But I still wonder what I am doing wrong because the load event has to be fired if control was loaded ! Here is some code: <Window x:Class="MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:my="clr-namespace:OUTPUT___VideoContent" Title="OUTPUT - VideoContent" Height="350" Width="525"

问题 Should an addListener method check for duplicate registrations when called? If so, what should happen when a duplicate is found? final public class exampleCanFire { public void addFooListener(FooListener listener) { // Before adding listener to private list of listeners, should I check for duplicates? } } 回答1: My preference is to store them in a List and not check for duplicates. Some advantages of this approach: Listeners are notified in a deterministic order and could potentially mark

问题 I am new in C# and currently working on the backend code to support PIN pad. Basically, my code OpenDevice() -> RequestPIN() -> key in PIN on PIN PAD -> GetResultPIN() -> ConsolePrintOutPIN() -> Print keyed PIN on the Console I don't know how to write thread for this, so that once the "Enter key" is hit on the device after PIN, the system would automatically rolls to function GetResultPIN() . So, with my elementary knowledge, I wrote the following codes using Console.ReadLine() to separate

问题 I'm new here and have a really mysterious problem to start off. I'm a software developer in the UK and have over 15 years of experience but have only been developing in .Net for 18 months. My NotifyIcon mouse events are not firing! I am using C# to write an application that starts as a NotifyIcon ('main app icon') and displays a ContextMenu on mouse right-click. This works fine: ContextMenu, forms launching and mouse click events firing. A tiny bit of background: the application is supposed