timer

问题 I'm working on a simple little app which has 1 image and 3 timers. The goal is to draw a number of balls chasing back and forth with a decaying color after each one. It looks something like this: Now the problem is when I close the application, I get a number of errors in this order, and does not give me a breakpoint in the code. It only happens when it's moving from the right to the left, not from the left to the right. I thought it probably had to do with the timer(s) continuing after the

问题 I am looking to have a column in a JTable that counts the time that boolean column in the table is 'true' for. It is a timer for how the long the checkbox is checked. I'm having trouble wrapping my head around all of the mechanics for the algorithm. ActionListener actListner = new ActionListener() { public void actionPerformed(ActionEvent event) { System.out.println("k"); aTable.updateTime(); } }; Timer timer = new Timer(1000, actListner); timer.start(); TableModelListener tableListener = new

问题 I have an asp.net page with a timer embedded in an UpdatePanel (UpdateMode="Conditional", ChildrenAsTriggers="false"). The timer is responsible for updating some components of that page every few seconds. There are also some HyperLink controls on the page and they open a JQueryMobile dialog when clicked (data-rel="dialog"). The problem is that the timer i mentioned causes postback every few seconds. So when a dialog is opened and then closed, the first such postback after then causes the

问题 I've just inherited some Python code and need to fix a bug as soon as possible. I have very little Python knowledge so please excuse my ignorance. I am using urllib2 to extract data from web pages. Despite using socket.setdefaulttimeout(30) I am still coming across URLs that hang seemingly indefinitely. I want to time out the extraction and have got this far after much searching the web: import socket socket.setdefaulttimeout(30) reqdata = urllib2.Request(urltocollect) def handler(reqdata): ?

问题 I have a fractal generation component (a subclass of JPanel) inside a JFrame. When the user resizes the window, it takes quite a while to update the fractal to the new size. I currently have a ComponentListener on the JPanel, but its componentResized event is called every time the user moves the mouse while dragging the window border. This means that the fractal is told to resize many times, and slowly (over the course of a few minutes) grows to the new size. Is there a way to be notified

问题 I have image slider where images replace each other by timeout. I use jQuery function setInterval() but there is a small problem, after minimizing browser windows this function keep "working", and where I restore browser window images replace each other with incrediable high speed, like the whole time after window was minimized setInterval() collect actions but executing them after restoring the window. How to pause setInterval() on browser minimize or keep swap images when windows is

问题 Hey so I'm working on this little app and I let durationDateComponents = Calendar(identifier: Calendar.Identifier.gregorian).dateComponents([.year, .month, .day, .hour, .minute, .second], from: Date(), to: christmasDay, options: []) What do I do here? I get that the error is pointing me to change something with the array, but what? Thanks! 回答1: Remove options . That's not part of dateComponents and thus the compiler is having trouble identifying the method. let calendar = Calendar.current //

问题 Since I'm not a CS major, I'm having some difficulties translating my programming wishes into an actual program. What it basically boils down to is the following: how can I alternate an image on a label, showing each image for an amount of tim specific for each image. So: say I've images A and B; I'd like the user to see A for 1000ms and B for 200ms. This keeps on looping until a user presses a certain key. Now, I'm able to load an image onto a panel, quite easily even, and I've managed to

问题 Recently, I've been working with a system.form.timer in the UI thread . I've have noticed that while I can stop a timer on a background thread, I cannot start it back up unless I use BeginInvoke even though I do not receive a cross-threading exception . On a system.timers.timer however it seems that I can stop and start it from the background thread created by the timer. Why is this? Is a system.form.timer allowed to be stopped, but not enabled from a background thread? This seems a bit odd

问题 I have worked on the application which I present in the RAM after I am out of my application. Also the size in RAM is increases every time when I play the application. I don't know why it is happening. Please suggest me something. Also I am using timer in my application for 15 sec and after completing the time I show I Dialog that Your time is over. But some times that dialog appear 3-4 times on one time finish of time. This is very embarrassing for my application. Is this thing is due to the