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Window flags are a mix of a sort (e.g. Qt::Dialog) and zero or extra hints to the window system (e.g. Qt::FramelessWindowHint). On Windows, Qt can set no matter flags you want. Use grabKeyboard() if you want to grab that. Use grabMouse() if you want to seize that. On macOS, grabMouse() only works when the mouse is inside the frame of that widget. Note: On Windows, grabMouse() only works when the mouse is inside a window owned by the process. Warning: Calling resize() or setGeometry() inside resizeEvent() can lead to infinite recursion. The replace() operate by no means causes recursion. Warning: Calling setGeometry() inside resizeEvent() or moveEvent() can result in infinite recursion. As an illustration, when getting into a Qt Quick based mostly window with tab focus, it is kind of probably that additional tab presses will solely cycle contained in the QML utility. Tab), event() calls keyPressEvent(). If the event is ignored, the widget won't receive any drag move events. When you assign a new font to a widget, the properties from this font are combined with the widget's default font to type the widget's closing font. This is expected to improve as window supervisor protocols evolve. Returns the effective window system identifier of the widget, i.e. the native mum or dad's window system identifier. Returns the seen little one widget at point p within the widget's own coordinate system. The default implementation closes popup widgets if the person presses the important thing sequence for QKeySequence::Cancel (sometimes the Escape key). If the same key sequence has been grabbed by a number of widgets, when the key sequence occurs a QEvent::Shortcut event is shipped to all the widgets to which it applies in a non-deterministic order, but with the ``ambiguous'' flag set to true. The true case happens if neither the widget itself nor any mother or father as much as but excluding ancestor has been explicitly hidden. Returns true if this widget would turn out to be enabled if ancestor is enabled; otherwise returns false. In case your widget needs to know when it turns into enabled or disabled, you need to use the changeEvent() with sort QEvent::EnabledChange. EnabledTo(0) returns false if this widget or any if its ancestors was explicitly disabled.