event-bubbling

Understanding event bubbling in javascript

由 笑着哭i 提交于 2019-12-07 05:19:41
问题 I've been trying to understand even bubbling, and not quite sure I completely follow it. I started reading about it so that I could warn users when they were leaving a page on my website if they had started to enter data into a form (in a similar way to StackOverflow does!). The following code seems to work cross-browser: var entereddata = false; $(document).ready(function() { $('#contactform').bind('keypress',function(e) { if((e.which > 96 && e.which < 123) || (e.which > 47 && e.which < 58))

How to expose and raise custom events for a vb.net winforms user control

由 丶灬走出姿态 提交于 2019-12-07 03:19:19
问题 Please read THIS post. I have the same problem as described in this post but I am trying to do in in VB.net rather than c#. I am pretty sure to do this I have to use a custom event. (I used a code conversion site to get to learn about custom events.) So in the IDE when I type the following: Public Custom Event AddRemoveAttendees As EventHandler It expands to the following code snippet. Public Custom Event AddRemoveAttendees As EventHandler AddHandler(ByVal value As EventHandler) End

knockoutjs: prevent event bubbling for elements with no handler

由 南楼画角 提交于 2019-12-07 00:50:15
问题 It seems like the binding <event>Bubble: false only works when there's a defined event handler ( see Note 4 ) for <event> . Here's an example fiddle. For elements having native handlers for certain events (e.g. click: <textarea> , <a> , <select> , etc.), where the native handler suffices, I would expect setting the binding, e.g., clickBubble: false on them, without having to bind a "bogus" handler, to work. I guess my question is, is there another knockout way to achieve this without extra

jQuery event bubbling on button not working as expected in Firefox

由 橙三吉。 提交于 2019-12-06 20:50:44
问题 I have a <button> element inside of which I have 2 <span> elements. I have 2 attached jquery click event handlers for each of the span elements so I can do whatever I like for each click. Here's a quick look of the basic code: HTML <button> <span>Text1</span> <span>Text2</span> </button> Javascript $(function() { $('button').bind('click', function() { console.log('button clicked'); }); $('button > span:eq(0)').bind('click', function() { console.log('text1 span clicked'); }); $('button > span

When are tunneling and bubbling events useful in WPF?

由 ↘锁芯ラ 提交于 2019-12-06 19:23:45
问题 I understand how bubbling and tunneling works. However, i'm confused about using them. Here is why: I want to handle a mouse click event. To bubble it, there is MouseDown and, to tunnel it, there is PreviewMouseDown . However, MouseDown doesn't necessarily mean the user clicked the control. May be the user pressed the button and moved away from it to cancel the click. I wouldn't want to change anything if the button is not being clicked. So my question is, how are the Bubbling/Tunneling

Remove event listener with d3js not working

由 生来就可爱ヽ(ⅴ＜●) 提交于 2019-12-06 13:23:17
I have an SVG structure where there are some shapes inside. I want to fire an event when a shape is clicked and another one when is clicked over the SVG. The problem is the SVG event is always fired. In order to prevent this I'm disabling event bubbling from the shape. Also I've tried to disable the event with d3 but seems to not work. Also tried to disable event with the native Javascript code. An example of the super simple code is: SVG structure <svg id="canvas" xmlns="http://www.w3.org/2000/svg" version="1.1"> <g> <circle class="shape" r="10" cx="10" cy="10"> </g> </svg> Javascript code d3

Event Handling order

由 喜夏-厌秋 提交于 2019-12-06 08:15:38
问题 javascript jquery event handling if on event (for example 'click') binded one function for parent element and another handler function for child DOM element, which of them are called? If all of them will be call in which order? Thank you! 回答1: Events bubble "up" the DOM tree, so if you've got handlers for an element and its parent, the child element handler will be called first. If you register more than one handler for an event on a single DOM element (like, more than one "click" handler for

Android - Two onClick listeners and one button

由 落花浮王杯 提交于 2019-12-06 03:31:23
问题 I have a custom TextView which is clickable. It defines its own onClick handler in order to change its appearance based on clicks. However if I then define a second onClick handler in my activity in order to do something based on the button being clicked, only one of the onClick functions is called. onClick is a void function - is there any way to say I didn't process this click, please pass it on to other onClick handlers? To be more clear here is the code: Inside MyCheckButton which extends

Trying to prevent jQueryMobile swipe gesture from bubbling, but it's not working

由 爱⌒轻易说出口 提交于 2019-12-06 00:54:20
问题 I'm using jQuery Mobile and created something that somewhat resembles Android Holo Tabs: http://note.io/18RNMRk In order to get the swipe gesture to work for switching between tabs, this is the code I've added: $("#myPage #pageTabs").on('swipeleft swiperight', function(e){ e.stopPropagation(); e.preventDefault(); }); $("#myPage").on('swipeleft', function(){ ui.activities.swipe(1); }).on('swiperight', function(){ ui.activities.swipe(-1); }); With the tabs' HTML resembling: <div id="pageTabs">

Understanding event bubbling in javascript

由 橙三吉。 提交于 2019-12-05 10:21:44
I've been trying to understand even bubbling, and not quite sure I completely follow it. I started reading about it so that I could warn users when they were leaving a page on my website if they had started to enter data into a form (in a similar way to StackOverflow does!). The following code seems to work cross-browser: var entereddata = false; $(document).ready(function() { $('#contactform').bind('keypress',function(e) { if((e.which > 96 && e.which < 123) || (e.which > 47 && e.which < 58)) { entereddata = true; //alert(e.which); } }); }); function confirmLeave(e, d) { if(!e) e = window
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