event-handling

how to re-enable default after doing event.preventDefault()

由 浪子不回头ぞ 提交于 2019-12-09 17:31:35
问题 I know this exact question was asked here, but the answer didn't work for what I needed to do so I figured I'd give some example code and explain a bit... $(document).keypress( function (event) { // Pressing Up or Right: Advance to next video if (event.keyCode == 40 || event.keyCode == 39) { event.preventDefault(); $(".current").next().click(); } // Pressing Down or Left: Back to previous video else if (event.keyCode == 38 || event.keyCode == 37) { event.preventDefault(); $(".current").prev()

matplotlib: deliberately block code execution pending a GUI event

由 爱⌒轻易说出口 提交于 2019-12-09 16:50:36
问题 Is there some way that I can get matplotlib to block code execution pending a matplotlib.backend_bases.Event ? I've been working on some classes for interactively drawing lines and polygons inside matplotlib figures, following these examples. What I'd really like to do is block execution until I'm done editing my polygon, then get the final positions of the vertices - if you're familiar with MATLAB, I'm basically trying to replicate the position = wait(roihandle) syntax, for example here. I

Can the R console support background tasks or interrupts (event-handling)?

由 自闭症网瘾萝莉.ら 提交于 2019-12-09 16:11:50
问题 While working in an R console, I'd like to set up a background task that monitors a particular connection and when an event occurs, another function (an alert) is executed. Alternatively, I can set things up so that an external function simply sends an alert to R, but this seems to be the same problem: it is necessary to set up a listener. I can do this in a dedicated process of R, but I don't know if this is feasible from within a console. Also, I'm not interested in interrupting R if it is

How to change event handler priority in Symfony 2

由 本秂侑毒 提交于 2019-12-09 15:41:56
问题 I have defined 2 event listeners for "name: kernel.event_listener, event: kernel.request", but I can do what I want, I can't change the order of calling this listener. I try to use the "priority" number, but nothing helps. This event is always calling @first: MyBundle.Foo.Listener.RequestListener: class: %MyBundle.Foo.Listener.request.class% arguments: [ @session, @liip_theme.active_theme, @Need.some.infos.service ] tags: - { name: kernel.event_listener, event: kernel.request, method:

Do i have to unsubscribe from anonymous event handlers of local variables?

由 拈花ヽ惹草 提交于 2019-12-09 15:37:47
问题 If I have a code that looks something like this: public void Foo() { Bar bar = new Bar(); bar.SomeEvent += (sender, e) => { //Do something here }; bar.DoSomeOtherThingAndRaiseSomeEvent(); } Will bar be collected when the method runs out of the scope, or will I have to manually unsubscribe from the event to prevent a memory leak because of a reference to SomeEvent ? 回答1: Your situation is fine; the event subscriber will not prevent the publisher from being collected, but the opposite can

Identify during Page.Load if Button click event is going to be handled

由 主宰稳场 提交于 2019-12-09 13:48:14
问题 I have ASPX web page which has a Button on it. Once user click this button, request is submitted to server and button click event handler is executed. I have some logic that must reside on Page.Load, but this logic depends if request has been submitted by button click. Based on page life cycle event handlers executes after Page Load. Question : How in Page load I can find out what event handlers are going to be executed after Page Load? 回答1: @akton's answer is probably what you SHOULD do, but

QKeyPress event in PyQt

由 折月煮酒 提交于 2019-12-09 13:11:19
问题 I am having issues with my software. In my piano software if I keep pressing a key on the keyboard then it is making multiple repeated same tones of that particular key. But actually I need a single tone until the release of that particular key. I'm providing a part of my code that detects the keyPress event and calls the corresponding method. So what should be the changes that I've to do with my code?? def keyPressEvent(self, event): if type(event) == QtGui.QKeyEvent and event.key() ==

Use the value of continuous slider in MATLAB

由 别来无恙 提交于 2019-12-09 12:36:41
问题 I am kinda stuck here. I have tried to read and implement some simple continuous slider scripts, (like this one), but I am not getting anywhere. What I simply want to go, is use the continuous slider value in my plot, as I slide the slider. However, I cannot figure out how to extract the value of the slider to do so. So for example, make a continuous slider, and then use it to change the amplitude of a vector lets say, as you continuously slide it. How can that be done? Thanks. 回答1: Something

How to remove event listener in Chrome extension

由 女生的网名这么多〃 提交于 2019-12-09 04:35:56
问题 I am trying to remove the onRequest listener added by chrome.extension.onRequest.addListener after a request is made, like this: chrome.extension.onRequest.addListener( function(request){ chrome.extension.onRequest.removeListener(); other_function(request); } ); The problem is that I don't know if this works or not. I tried chrome.extension.onRequest.hasListener , which seems not to give the right answer, so I am wondering if there are some other ways to remove the onRequest listener or check

Application / MVC Event Model

由 时间秒杀一切 提交于 2019-12-09 04:31:27
Update: This question was inspired by my larger quest for mapping ontologically the whole software systems architecture enchilada. I've written a blog post about it , and hopefully it will help clarify what I'm after. Many, many, many frameworks and stacks that's event-driven have too much variation for my little head to get around. Is there somewhere some resources that defines the outline of a reasonable Application Event Model, what events there are, and what triggers are most common? I've got my own framework with a plugin and event-driven architecture, but I want to open-source it, and as
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