sleep

I have function which is reaction on button click. When I click on the button it should start repeat and write values form an array and show them in labels on main form. Problem is with function sleep - there is some bug or something, cause when I click on the button it waits quite a long time and then it finaly start the action but very quickly. Let's look at my code. Thx for advices. procedure TForm1.ButtonMereniClick(Sender: TObject); var iterator: Integer; begin iterator := 1; repeat //write some values stored int arrays to labels on form LabelTeplota.Caption:='Teplota: '+FloatToStr

I am a bit confused with Thread.sleep() method. if Thread.sleep() is a static method, how does two threads know which is put to sleep. For example, in the code below, I have two three Threads main , t and t1 . I call Thread.sleep() always. Not t.sleep() . Does it mean Thread.sleep() puts the current Thread to sleep? That means a Thread instance puts to sleep by itself by calling the static method. what if t1 wants to put t to sleep. that shouldn't be possible correct? public class ThreadInterrupt { public static void main(String[] args) throws InterruptedException { System.out.println(

How can i detect when a users computer goes into sleep (laptop lid closes, sleep mode due to inactivity, etc)? I need to do this to disconnect the users TCP connection. Basically we got a simple chat application where we want to take the user off-line. There is no Qt way to detect when computer goes to sleep or hibernation. But there are some platform dependent ways to do it. On Windows you can listen for the WM_POWERBROADCAST message in your WindowProc handler: LRESULT WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) { if (WM_POWERBROADCAST == message && PBT_APMSUSPEND == wParam

I have a task to do something every "round" minute(at xx:xx:00) And I use something like const int statisticsInterval=60; time_t t=0; while (1) { if (abs(t-time(NULL)==0)) //to avoid multiple calls in the same second that is the multiple of 60 boost::this_thread::sleep(boost::posix_time::seconds(2));//2, not 1 to make sure that 1 second passes t=time(NULL); boost::this_thread::sleep(boost::posix_time::seconds(statisticsInterval-(t%statisticsInterval))); //DO WORK } As you can see I use sleep (60sec - number of elapsed seconds in current minute). But one programmer told me that it is not

I want to show other image in ImageView within 3 second, after that rollover old image. The code: OnClickListener oc = new OnClickListener() { @Override public void onClick(View v) { ImageView iv = (ImageView)v; iv.setImageResource(img2_id); SystemClock.sleep(3000); iv.setImageResource(img1_id); } } myImageView.setOnClickListener(oc); But it doesn't work? So, am I doing something wrong? You are blocking the UI thread. Thus during the sleep command, the screen won't refresh. What you need is to schedule a non-blocking delayed call to a function which changes image resource. Here is a modified

The following snippet [DllImport("winmm.dll", EntryPoint = "timeBeginPeriod")] public static extern uint TimeBeginPeriod(uint uMilliseconds); static void Main(string[] args) { if (TimeBeginPeriod(1) != 0) Console.WriteLine("TimeBeginPeriod failed!"); Console.WriteLine("Sleep"); Stopwatch sw = Stopwatch.StartNew(); for (int i = 0; i < 10; i++) { Thread.Sleep(1); Console.WriteLine(sw.ElapsedTicks * 1000d / Stopwatch.Frequency); sw.Restart(); } Console.WriteLine("Threading.Timer"); sw = null; System.Threading.Timer t = null; int n = 0; t = new Timer(state => { if (sw == null) sw = Stopwatch