event-handling

问题 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

问题 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

问题 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

问题 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) 回答1: Generally you should use the

问题 We have built a window service that listens to folders with FileSystemWatcher , when created we process the file and so on. But after couple of days the event stops working. Is it possible that it being collected by the garbage collector (GC)? Does the GC collect it holding class (which is a singleton)? Should I use a weak event? Do I have a bug that means the event gets unregistered? What i think the problem is, that FSW has an internal buffer, when it overflows its an error, take a look in

问题 Yesterday I had a chat with a taxi driver and upon mentioning that I am a programmer, he told me that a couple of days earlier he had experienced the following: upon trying to copy the URL from the address bar of his browser, a messagebox appeared with a message like "Please don't copy this link, rather register" . I am not a web developer, so this might be a lame question :-) but I wonder how such a thing is accomplished? What technology or language gives one this level of control over the

问题 I'm trying to dispatch a custom event from a custom ItemRenderer This is my custom event package events { import customClass.Product; import flash.events.Event; public class CopyProductEvent extends Event { public static const COPY_PRODUCT:String = "COPY_PRODUCT"; public var picked:Prodotti; public function CopyProductEvent(type:String, picked:Product) { super(type); this.picked = picked; } } } In the itemRenderer I have a function that does that: private function sendEvent(o:Product):void {

问题 i want to create a simple event handler for a game, here's my code $(document).keydown(function(e){ switch(e.keyCode){ case 65: //left (a) console.log('left'); break; case 68: //right (d) console.log('right'); break; } }); the problem is that if i press and hold a key, after a little it triggers multiple times. how can i prevent this behaviour? i'm running my code on google chrome 回答1: This is key repeat. You can defeat it if you want to, by remembering that you already know the key is down:

问题 You know what I liked best about obtrusive javascript? You always knew what it was going to do when you triggered an event. <a onclick="thisHappens()" /> Now that everybody's drinking the unobtrusive kool-aid it's not so obvious. Calls to bind events can happen on any line of any number of javascript file that get included on your page. This might not be a problem if you're the only developer, or if your team has some kind of convention for binding eventhandlers like always using a certain

问题 Does any one know where to find example code for an implementation of Domain Events as described by Udi Dahan in Domain Events – Salvation? 回答1: DDDSample.Net has one. 回答2: A better implementation of Domain Events, in my opinion, can be found at https://github.com/bsommardahl/BlingBag. There's a sample application and implementation instructions. I like this implementation more because it doesn't use the static class to raise domain events and doesn't couple your domain to your infrastructure