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jQuery events: prepend a callback handler to already existing ones

由 ￡可爱￡侵袭症＋ 提交于 2019-12-01 20:31:01
On a web page are elements with click and/or keypress handlers. If I add a new one it would be executed after them. I need a way to add a new callback which is prepended to the event handler list, so that it is executed beforehand. How is that possible with jQuery? Update Why can't I just use jQuery's unbind method? I am injecting my jQuery code to any web page, so that i don't know if any and which JavaScript framework is used. I need a universal way to detect event handlers and prepend mine. (Before you ask, I'm building a "recorder" application that tracks the users actions to store them

iPhone jQuery click event

由 被刻印的时光 ゝ 提交于 2019-12-01 20:15:29
I have a simple click event attached to a number of anchors on my web app. $('a.heading').live("click", function(e) { e.preventDefault(); //do my stuff }); It's not rocket science. However on my iPhone the click doesn't register. It would appear it uses the touch handler for iPhone (iPad, Android etc are all fine). I've seen a couple of tutorials but cannot seem to get my head around it. Is there not a one liner that I can use that jQuery is so usually good at? This did the trick: var userAgent = navigator.userAgent.toLowerCase(); var isiPhone = (userAgent.indexOf('iphone') != -1 || userAgent

Jquery prepend click handler

由 孤人 提交于 2019-12-01 19:49:38
If you know a better way to do this then please let me know. Right I have a page which will contain lots of buttons, charts and tables. I have read about stopping event propogation and that's what I'll be using. I want to enable help on cerain elements. I have a checkbox which changes the cursor on help enabled divs. What I want to do is prepend a help function before the normal click behaviour. Basically it's like this. <input type="button" value="Click me" onclick="alert ('hello')" /> what i want is that if the checkbox is clicked I add a css class (already done) and then I add a click

Click on given element in canvas

由 北城以北 提交于 2019-12-01 19:40:26
Is there any trick to determine if user clicks on given element rendered in canvas? For example I'm displaying rhombus from .png file with transparent background and i want to know if user click inside or outside that figure (like mouse-element collision). There is no concept of individual elements in a canvas - it is simply just an area that you're drawing pixels onto. SVG on the other hand is made up of elements which you can then bind events to. However there are a few approaches you can take to add click events to canvas: Position an html element that overlays the area on the canvas you

VUE--v-on修饰符

由 北城以北 提交于 2019-12-01 19:19:21
1、v-on的修饰符 .stop:阻止事件冒泡 <div @click="getTitle"> 阿Q <button @click="getBut">按钮</button> <button @click.stop="getBut2">按钮2</button> </div> .prevent：阻止默认行为 <form action="Baidu"> <input type="submit" value="提交"> <input type="submit" value="提交" @click.prevent="getSubmit"> </form> .enter:监听enter(确认)键的情况-------（按下\弹起） <input type="text" @keyup="getKeyup"> <input type="text" @keyup.enter="getKeyup"> .once：事件只触发一次 <button @click="getOnce">按钮</button> <button @click.once="getOnce">按钮2</button> ******完整代码******* <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title>

jquery redirect on click or after 10 seconds

由 纵然是瞬间 提交于 2019-12-01 18:31:46
I have a spash screen on a website that has a div with the ID of "splash" i'm trying to make the div fade in then if the user clicks on the div it fades out and redircts to the main site. If the user dosen't click it just fades out and redirects after 10 seconds. The timed redirect is working but not the click function. <script type="text/javascript"> $(document).ready(function() { $('#splash').hide(); $('#splash').fadeIn(1000, function() { $(this).delay(10000).fadeOut(1000, function() { window.location = 'http://www.examle.com'; }); $(this).click().fadeOut(1000,function() { window.location =

Python&PyGTK: Stop while on button click

由 风流意气都作罢 提交于 2019-12-01 18:23:27
I'm working on programming some application and I would like to create while loop when button is clicked and if it's clicked again to stop it. This is the code for button: self.btnThisOne = gtk.Button("This one") self.btnThisOne.connect("clicked", self.startLoop) The code for startLoop def would be: def startLoop(self): while self.btnThisOne?(is_clicked)?: #do something How to do that? Unfortunately, you cannot just have an unconstrained while loop running in the main thread of your application. That would block the main gtk event loop and you won't be able to process any more events. What you

click() jquery function not available on new divs

由 末鹿安然 提交于 2019-12-01 17:42:35
During the running of my website i create new divs using jquery with class "a". I have defined a click() function for "a" class as follows: $(document).ready(function() { $(".a").click(function(){ $(".a").hide(); }); }); Problem is that the new divs created with the same class do not call this function when clicked. Other divs with "a" class which are there at the beginning do. What am I doing wrong? $(document).delegate('.a', 'click', function() { $(this).hide(); }); Try using the .live() function which should also apply for newly inserted DOM elements that match your selector: $(document)

Avoid application activation and focus in when clicking buttons on it - Windows API or Qt

由 我的梦境 提交于 2019-12-01 17:15:52
Situation: A border-less QDialog stays successfully on top of other applications. The problem is when clicking on this always-on-top application window, the following occurs: The clicked always-on-top application gets activated The clicked always-on-top application window steals the focus of previous active/focused app Is there a possibility that when clicking on this always-on-top inactive and unfocused application window, the current application does not loose activation and focus while user being still able to interact with the always-on-top application (hitting buttons or drop-down menus,

jquery datepicker prevent native click in onSelect

由 大兔子大兔子 提交于 2019-12-01 16:40:10
问题 I'm in struggle trying to prevent native click inside jquery datepicker.onSelect event Example below is not working, click still is being triggered: onSelect: function(dateText, inst) { if (myCondition) { return false; }} Another trick would be calling event.preventDefault/ inside onSelect, if event object has been available. Any known solutions ? 回答1: Perhaps you can achieve this via CSS instead of binding to events? 回答2: What if you used the beforeShow event ? as referenced here http:/
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