QDragLeaveEvent class provides an event that is sent to a widget when a drag and drop action leaves it. 更多...
| 头： | #include <QDragLeaveEvent> |
| qmake: | QT += gui |
| 继承： | QEvent |
| QDragLeaveEvent () |
QDragLeaveEvent class provides an event that is sent to a widget when a drag and drop action leaves it.
This event is always preceded by a QDragEnterEvent and a series of QDragMoveEvent s. It is not sent if a QDropEvent is sent instead.
另请参阅 QDragEnterEvent , QDragMoveEvent ，和 QDropEvent .
构造 QDragLeaveEvent .
警告： Do not create a QDragLeaveEvent yourself since these objects rely on Qt's internal state.
