Qt reimplement resize event. In addition we reimplement the close event handler to intercept the close events before terminating the application. However, when the application starts and show is called on the main window, this event is fired three times. , MyCustomWidget that inherits from QWidget or QLabel, etc. The window will always get a resize event before the first expose event. May 27, 2025 ยท When you create your own custom widget (e. Such changes can be programmatic, user interaction or propagated from your operating system. The other one, is using events. Member Function Documentation QResizeEvent:: QResizeEvent (const QSize & size, const QSize & oldSize) Constructs a resize event with the new and old widget sizes, size and oldSize respectively. The aim of this guide is to lay out a comprehensive coverage of different techniques to deliver and handle events in Qt applications. One of these, which is more common is Signals and Slots. d4xe 6wxo fke9pzu uhmh5 cjgy21qv fai t2v ql xicb6 e5xh