event-handling | 易学教程

JavaFX 2 XYChart.Series and setOnMouseEntered

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Is it possible to set instance of XYChart.Series to act on setOnMouseEntered? It seems to me that one precondition to make it work would be to implement EventTarget interface. As for JavaFX XYChart.Series I would like to highlight the following data series when cursor touches the yellow line (instance of XYChart.Series): http://docs.oracle.com/javafx/2.0/charts/img/line-series.png To be more precise I would like to do the following but for instance of XYChart.Series not Button: public class Temp { /*code removed*/ Button btn = new Button("Button to touch"); btn.setOnMouseEntered(new

How to implement touch events in uiwebview?

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I have tried various solutions provided on this site and others to implement touch events on uiwebview. But still I am not able to do this. Actually, i have created a article reader application. Here, I have added a uiwebview on the normal uiview. Now, I want to trace some user touch events on that particular webview. When I do this on normal view, it works perfectly. But if I try it on webview. it stops working. The solutions I tried before are implementing touch methods like touchbegan touchended touchmoved touch cancelled 2 implementing uigesturerecognizer 3 implementing window touch events

Are handlers always called synchronously during jQuery click()?

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Through some brief testing it appears that click() will trigger any applicable handlers synchronously (that is, the handlers are all invoked before click() returns), which is desirable for what I'm developing. However, the jQuery documentation does not seem to guarantee (does not mention one way or the other) that handlers are invoked synchronously. Is a synchronous behavior guaranteed somewhere, or otherwise safe to assume as cross-browser and future-proof? Yes, behind the scenes all the click events will run synchronously before the normal default functionality kick in. One way to see this

Double click ambiguity in Jquery?

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I am trying to set some text in window for single and double click in jquery . But I am facing the ambiguity for double click . When trying to do double click , first single click function works and then double click works. Similar question is here check here and it was very old. Also it has some problem. Any new answer using the latest jquery version. Check the live demo here of my problem live demo This my code , <!DOCTYPE html> <html> <head> <script src="http://code.jquery.com/jquery-1.9.1.js"></script> </head> <body> <a id="press" href="http://jquery.com">Click here</a> <div id="log"></div

GWT UiHandler on HTMLPanel

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问题 I'm writing a widget with the following markup: <g:HTMLPanel ui:field="shortcutPanel" styleName="{style.shortcut}"> <g:Image ui:field="shortcutImage"></g:Image> <span ui:field="shortcutLabel"></span> </g:HTMLPanel> So essentially a div that wraps and image and a label. Now, instead of adding the event handlers on the image/span, I'd like an onClick to be associated with the HTMLPanel. My problem however is that gwt tells me that shortcutPanel doesn't not have an addClickHandler method

What is the difference between a delegate type and eventhandler type?

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问题 Three related idioms: event, delegate, event-handler. I always get confused by who is "added" to who. event += handler event += delegate handler += delegate From what I know: delegate: a pointer to a function with a known signature. event-handler: a delegate which is registered to an event. Basically, is it the same as a delegate? event: a list of delegates\event-handlers which are executed when the event is invoked using event() What confuses me more is this signature in MSDN: public

Preventing JavaScript click event with Scriptaculous drag and drop

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I have some elements on a page which are draggable. These same elements have a click event which navigates to another page. I'm trying to determine the best way of preventing the click event from firing if the user is dragging but still allow the click event if not dragging. Anyone have any ideas of the best way to accomplish this? I solved this by using something like the following: new Draggable('id', { onStart: function() { dPhoto = $('id'); Event.stopObserving('id', 'click'); }, onEnd : function() { setTimeout("Event.observe('id', 'click', function() { location.href = 'url'; });", 500); },

What is the best way to handle multiple key events in Javascript?

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问题 Pressing space bar in game will make a character shoot, pressing space bar when a confirmation box is shown will make this box disappear and pressing space bar in a highscore form will add a space in an input box. In this example there are several events for the same key, but only one is fired at a time. Is there a general (or specific for Javascript) method or way of programming to add events to a certain key, so they are only executed under certain circumstances? Of course it can be done

C# - Create an EventHandler that can take any number of parameters

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问题 I wish to create a custom EventHandler that can have any number of objects as its parameters and the objects it gets isn't known in advance. I know I can pass it an Object[] but what I would like is something similar to MyEventHandler someCustomEvent(Object obj1, Object obj2, Object obj3) where the number of objects can be 0 or 10 if needed. EDIT: So thanks to the comments and answers I've got I've come to this, public class FinishedEventArgs : EventArgs { public Object[] Args{ get; set; } }

Can you make custom events with UIControlEventApplicationReserved?

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问题 I have written a subclass of UIControl that tracks a number of gestures that are of interest to me. In the documentation for the UIControlEvents enumeration, it says that there is a range of event numbers called UIControlEventApplicationReserved that is "available for application use." Does this mean that I am free to use this range of numbers for my own custom events? If so, can someone please tell me how to fire events? The obvious way I can think of to do it is this: enum { ...