event-handling

Differences in assigning C# event handlers?

由 杀马特。学长 韩版系。学妹 提交于 2021-02-04 17:46:35
问题 I've always assigned event handlers like this, guided by Intellisense auto-completion. RangeSelector.RangeChanged += new EventHandler(RangeSelector_RangeChanged); I've recently noticed one of my colleagues does it this way. RangeSelector.RangeChanged += RangeSelector_RangeChanged; Both methods are syntactically correct, compile and behave as expected. What are the differences, benefits or disadvantages of these methods. Do they result in the same IL code or is there some subtle difference

Javascript: Add event listener to document opened in new window

由 南楼画角 提交于 2021-02-04 14:15:30
问题 Is there anything that prevents me from adding a event listener to the window that results from a window.open() call? I am trying to set a handler function to be triggered on a visibility change event on the new document, but this handler function is not being called. 回答1: There's nothing that prevents you from doing that ( as long as the window you are opening is in the same domain as the parent/opener window; Just imagine what malicious people could do if that weren't the case ). Once you

Javascript: Add event listener to document opened in new window

由 烂漫一生 提交于 2021-02-04 14:15:28
问题 Is there anything that prevents me from adding a event listener to the window that results from a window.open() call? I am trying to set a handler function to be triggered on a visibility change event on the new document, but this handler function is not being called. 回答1: There's nothing that prevents you from doing that ( as long as the window you are opening is in the same domain as the parent/opener window; Just imagine what malicious people could do if that weren't the case ). Once you

Utilising the pygame.mixer.music.get_endevent()

由 落花浮王杯 提交于 2021-01-29 19:39:56
问题 I want a tkinter label to show nothing when a sound effect has finished. I've been researching the www on how to create/initialise/catch the end of music event with no luck. def play_btn(): if mixer.music.get_busy(): mixer.music.fadeout(1000) snd_fyl.set(snd_list.get(ACTIVE)) mixer.music.load(snd_dir+"/"+snd_list.get(ACTIVE)+"mp3") mixer.music.play() def stop_btn(): mixer.music.stop() clear_label() def clear_label(): snd_fyl.set("") snd_lbl1 = LabelFrame(MainWindow, text="Sound effect playing

How to detect click on `<div>` element contained in a WebView control on Visual Studio 2019?

由 大兔子大兔子 提交于 2021-01-29 06:04:13
问题 I want to use .Net WebView control in a WinForm to display Unicode characters greater than 0xFFFF. I have created following prototyp VB.Net program to load an HTML page containing Javascript and CSS Style. Dim sText As XElement = <html> <head> <style type="text/css"> .unicode { font-size: 32px; cursor: pointer; } </style> </head> <body> <script type='text/javascript'> function clickUnicode() { var sValue = this.event.srcElement.innerText alert('Click on Unicode character:' + sValue); } <

Python using threading.Event()

由 一笑奈何 提交于 2021-01-29 03:35:43
问题 I have two threads that are accessing a web service. One thread is updating a resource and other is possibly getting them. My webservice class looks below: class WebServiceHandler(object): RESOURCE_URL='/Resource/{0}' def __init__(self, host, port): self._http_connection = httplib.HTTPSConnection(host, port) def update(self, id, resource): url = self.RESOURCE_URL.format(id) self._http_connection.request('POST', url, resource) response = self._http_connection.getresponse() response_body =

How to send/dispatch keypress events to an embedded iframe in React?

由 只谈情不闲聊 提交于 2021-01-28 08:54:47
问题 I have an iframe of Google Slides which I embedded in my web app. The iframe implementation is: <iframe ref={slidesRef} src={src} width='100%' height='100%' allowFullScreen={true}/> I want to listen to click events on the main web page (while the iframe is not necessarily in focus), then create their corresponding keypress events - and pass them to the iframe, thus making the slideshow iframe to trigger and react to the user key presses. I tried something like this: function onButtonClick(e)

How to send/dispatch keypress events to an embedded iframe in React?

由 北战南征 提交于 2021-01-28 08:40:35
问题 I have an iframe of Google Slides which I embedded in my web app. The iframe implementation is: <iframe ref={slidesRef} src={src} width='100%' height='100%' allowFullScreen={true}/> I want to listen to click events on the main web page (while the iframe is not necessarily in focus), then create their corresponding keypress events - and pass them to the iframe, thus making the slideshow iframe to trigger and react to the user key presses. I tried something like this: function onButtonClick(e)

Page Load being called before Button Event in .net

由 你说的曾经没有我的故事 提交于 2021-01-28 01:50:47
问题 I have the following code: protected void Page_Load(object sender, EventArgs e) { //get questions List<Question> questions = Question.GetQuestionsForTesting(); //for each question foreach (Question currQuestion in questions) { //display the questionAnswer control QuestionAnswer newControl = (QuestionAnswer)LoadControl("~/Account/QuestionAnswer.ascx"); newControl.newQuestion = currQuestion; questionAnswerPanel.Controls.Add(newControl); } } protected void submitAnswers_Click(object sender,

Qt - selectively allow a click to fall through to a lower application window

由 。_饼干妹妹 提交于 2021-01-27 20:54:18
问题 Is it possible to receive a mouse click even in a Qt application, evaluate it, and if necessary, let it fall through to whatever might happen to be below the Qt application window? Note that Qt::WA_TransparentForMouseEvents doesn't facilitate evaluating the click before passing it through. And since the click evaluation incorporates some dynamic logic, it is not applicable to set a static mask either, on top of this having a visual impact as well. Ideally, I would like a way to selectively
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