timer
How to use QTimer
Other way is using of built-in method start timer & event TimerEvent. Header: #ifndef MAINWINDOW_H #define MAINWINDOW_H #include <QMainWindow> namespace Ui { class MainWindow; } class MainWindow : public QMainWindow { Q_OBJECT public: explicit MainWindow(QWidget *parent = 0); ~MainWindow(); private: Ui::MainWindow *ui; int timerId; protected: void timerEvent(QTimerEvent *event); }; #endif // MAINWINDOW_H Source: #include “mainwindow.h” … Read more
Timer in Portable Library
Update: We have fixed this in Visual Studio 2013. Portable libraries targeting Store (Windows 8.1) and .NET Framework 4.5.1 projects can now reference Timer. This is unfortunate case of where our implementation details are leaking to the user. When you target just .NET 4.5 and Windows Store apps, we actually cause you to build against … Read more
If mouse over for over 2 seconds then show else don’t?
You need to set a timer on mouseover and clear it either when the slide is activated or on mouseout, whichever occurs first: var timeoutId; $(“#NewsStrip”).hover(function() { if (!timeoutId) { timeoutId = window.setTimeout(function() { timeoutId = null; // EDIT: added this line $(“#SeeAllEvents”).slideDown(‘slow’); }, 2000); } }, function () { if (timeoutId) { window.clearTimeout(timeoutId); timeoutId … Read more
calling a method after each 60 seconds in iPhone
Use NSTimer NSTimer* myTimer = [NSTimer scheduledTimerWithTimeInterval: 60.0 target: self selector: @selector(callAfterSixtySecond:) userInfo: nil repeats: YES]; After each 60.0 second , iOS will call the below function -(void) callAfterSixtySecond:(NSTimer*) t { NSLog(@”red”); }
Xcode Objective-C | iOS: delay function / NSTimer help?
sleep doesn’t work because the display can only be updated after your main thread returns to the system. NSTimer is the way to go. To do this, you need to implement methods which will be called by the timer to change the buttons. An example: – (void)button_circleBusy:(id)sender { firstButton.enabled = NO; // 60 milliseconds is … Read more
Throwing exceptions in callback method for Timers
The exception is not passed back to the calling thread. If you want it to be, you can add a catch block and figure out a way to signal the calling thread. If the calling thread is a WinForms or WPF UI thread, you can use the SynchronizationContext class to pass a call to the … Read more
Can you implement a timer without a “sleep” in it using standard c++/c++11 only?
C++11 provides us with std::condition_variable. In your timer you can wait until your condition has been met: // Somewhere else, e.g. in a header: std::mutex mutex; bool condition_to_be_met{false}; std::condition_variable cv; // In your timer: // … std::unique_lock<std::mutex> lock{mutex}; if(!cv.wait_for(lock, std::chrono::milliseconds{timeout_ms}, [this]{return condition_to_be_met;})) std::cout << “timed out!” << std::endl; You can find more information here: https://en.cppreference.com/w/cpp/thread/condition_variable … Read more
Using System.Windows.Forms.Timer.Start()/Stop() versus Enabled = true/false
As stated by both BFree and James, there is no difference in Start\Stop versus Enabled with regards to functionality. However, the decision on which to use should be based on context and your own coding style guidelines. It depends on how you want a reader of your code to interpret what you’ve written. For example, … Read more