Qt close event windows

All other trademarks are property of their respective owners. Contents Public Functions Detailed Description. Detailed Description Close events are sent to widgets that the user wants to close, usually by choosing "Close" from the window menu, or by clicking the X title bar button. See also accept.

Note that this method is modified to be used with Qt, but you can easily replace the few Qt classes used in this example and remove the dependency on Qt if you are using any other frameworks. Think of this method as a programmatic method for accessing Windows Event Viewer not technically true but still … and enumerating the events in a usable way.

First you need to make sure you are using the correct libraries in your Qt project. In your source files make sure the following two Win32 API header files are included:. Next, to be able to fetch the events you need, you must know the publisher or provider , the channel and the query an XPath query to filter out the events.

Then we use the EvtQuery function to fetch the relevant events:. The events we have retrieved are just raw handles. Notice that we are using GetLastError function to figure out what went wrong if the function call fails.

So nothing will be displayed as mentioned earlier. In this way of closing the window, we create a QPushButton and then bind a function to close the window to it which is triggered when that button is clicked. The above program creates a simple PyQt5 application with a QPushButton as its central widget and then binds a function to trigger on click. The function is a simple lambda function that calls the self.

So when the button is clicked the window closes. In this way of closing the window, we create a QAction and then add that action to the window we want to close using the. The above program creates a simple PyQt5 application with a QLabel as its central widget. When a widget accepts the close event, it is hidden and destroyed if it was created with the Qt. If it refuses to accept the close event nothing happens.

Under X11 it is possible that the window manager will forcibly close the window; but at the time of writing we are not aware of any window manager that does this. The event handler QWidget.