event-handling | 易学教程

Cocoa: I've got my user's input - Now what?

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问题 In a nutshell what my program does is: it executes and takes user input periodically using nswindow (which is controlled by my NSWindowController object) and continues execution. here is my myController.mm which is calling and showing the window to take user input: EncryptPasswordDlgController encPassController = [[EncryptPasswordDlgController alloc] init]; [encPassController showWindow:self]; NSString *inputPassword = [encPassController password]; here is my nswindowcontroller object code:

How to add multiple event handlers to same event in React.js

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All: I wonder if it is possible that binding multiple event handlers to same event? For example: var LikeToggleButton = React.createClass({ render: function(){ (function toggle(){ this.setState({liked:!like}); }).bind(this); return ( <div onClick={toggle}>TOGGLE LIKE</div> ); } }); Until this point everything seems normal, but I want to add another feature to that button, which is decide by other option: For example, I have another switch component(could be anything like checkbox or radio button etc.) called "count toggle", which when enabled, the LikeToggleButton's button will be added

Raise custom events in C# WinForms

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I have some Events I created on my own and was wondering on how to raise them when I want. Probably my application design is also messed up, might take a look at that if you like. This is the Structure ProgramContext - Form MainWindow + Control TextBox + Control Button + ... In this case, the MainWindow.TextBox holds some information that is updated quite often at runtime. So, I somehow need it to refresh itself when I want to (so it can reload its data from the database, where the it's stored) I tried hooking an EventHandler to its Validating -Event, but that didn't seem to do the trick. So,

event.preventDefault() not canceling link direction in jQuery Mobile

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问题 Background I've been struggling with this stupid little problem of trying to cancel link direction when click event is fired on an anchor element in jQuery Mobile app. Let's say I have a simple multi-page document like this: <div data-role="page" id="page-1"> <div data-role="content"> <a href="#page-2" id="mLink">page 2</a> </div> </div> <div data-role="page" id="page-2"> <div data-role="content"> </div> </div> ... and JavaScript

Event handler bind to an anonymous function vs named function

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I know .on() exists with jQuery and .bind() should not be used in the future, considering that I have a version of jQuery greater than or equal to 1.7. What I want to know is this: are there are any differences between attaching an anonymous function or named function to an event handler using .bind() ? Example: // Anonymous function $(".warning").bind("click", function(){ alert("Hello"); }); // Named function $(".warning").bind("click", foo); function foo(){ alert("Hello"); } Imagine that I have 100 div 's with the class warning in my page. The function .bind() will attach a new function to

Removing anonymous event handlers [duplicate]

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问题 This question already has an answer here : Closed 8 years ago . Possible Duplicate: C#: How to remove a lambda event handler Is it possible to remove an event handler which was attached as anonymous function? Let's say I have an event, and I subscribe to it in this way: TestClass classs = new TestClass (); classs.myCustomEvent += (a,b) => { Console.Write(""); }; Is it possible somehow to remove this eventHandler using -= ?? 回答1: It is possible, but you need to store it in a local variable

Force an event in jQuery

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To all; I have created a up and down counter for decimal places and when a change occurs I have it force a blur event to recalculate fields with the following code: $('button').click(function(){ var decPlaces = document.calculator.dpv.value * 1; var hii = document.calculator.origin.value; if (this.id == 'up' && decPlaces < 9){ document.calculator.dpv.value = decPlaces + 1; if (hii != ''){ document.calculator[hii].focus(); document.calculator[hii].blur(); } } if (this.id == 'down' && decPlaces > 0){ document.calculator.dpv.value = decPlaces - 1; if (hii != ''){ document.calculator[hii].focus();

Are event arguments passed by reference or value in C#?

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A rather simple question (I think), but I don't seem to see an answer already. I know that some values are passed via value (like int and long), and others are passed by reference (like Strings) when you pass them to functions. In my program, I have it using background worker so that the GUI doesn't lock up when we are doing a long process in the background. I need to pass data back to the UI thread from another file, so I have been using events for that. Now I need to send a list of arrays of Strings back to the GUI thread to handle there, and I am worried how it will be handled. Basically,

Which GWT EventBus should I use?

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In the gwt-user.jar there are 2 EventBus interfaces and SimpleEventBus implmentations. com.google.gwt.event.shared.EventBus and com.google.web.bindery.event.shared.EventBus I'll refer to these as 'gwt.event' and 'web.bindery'. Looking at the JavaDocs and source code I can see that the gwt.event merely wraps the web.bindery one. However the gwt.event implementation also hides a number of deprecated methods So which implementation should I use? (I'm on GWT 2.4) Generally you should use the one in com.google.web.bindery . The only version used to be in com.google.gwt.event , but when

Are events lost in jQuery when you remove() an element and append() it elsewhere?

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What happens in jQuery when you remove() an element and append() it elsewhere? It appears that the events are unhooked - as if you were just inserting fresh html (which I guess is what happening). But its also possible my code has a bug in it - so I just wanted to verify this behavior before I continue. If this is the case - are there any easy ways to rehookup the events to just that portion of HTML, or a different way to move the element without losing the event in the first place. Yes, jQuery's approach with remove() is to unbind everything bound with jQuery's own bind (to prevent memory