如何检测何时将QDockWidget从QMainWindow中移出? [英] How to detect when a QDockWidget is moved out of a QMainWindow?

问题描述

有一个信号，允许用户知道QDockWidget已被移到QMainWindow内部内部的地方:

There is a signal which allows the user to know where a QDockWidget has been moved inside a QMainWindow :

void dockLocationChanged(Qt::DockWidgetArea area)

问题在于，将QDockWidget从QMainWindow中移出 时，不会触发该信号(通过拖动或双击Dockwidget的标题栏).

The problem is that this signal is not fired when a QDockWidget is moved out of the QMainWindow (either by dragging or by double-clicking the dockwidget's title bar).

是否有一种方法可以检测到该事件，无需重新实现 moveEvent()?

Is there a way to detect that event, without reimplementing moveEvent()?

推荐答案

有一个专门用于此目的的floating属性和一个topLevelChanged信号.

There is a floating property exactly for that purpose, and a topLevelChanged signal.

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