PySide.QtGui.QHoverEvent class contains parameters that describe a mouse event.
Mouse events occur when a mouse cursor is moved into, out of, or within a widget, and if the widget has the Qt.WA_Hover 属性。
函数 PySide.QtGui.QHoverEvent.pos() gives the current cursor position, while PySide.QtGui.QHoverEvent.oldPos() gives the old mouse position.
There are a few similarities between the events QEvent.HoverEnter and QEvent.HoverLeave , and the events QEvent.Enter and QEvent.Leave . However, they are slightly different because we do an update() in the event handler of HoverEnter and HoverLeave .
QEvent.HoverMove is also slightly different from QEvent.MouseMove . Let us consider a top-level window A containing a child B which in turn contains a child C (all with mouse tracking enabled):
Now, if you move the cursor from the top to the bottom in the middle of A, you will get the following QEvent.MouseMove events:
You will get the same events for QEvent.HoverMove , except that the event always propagates to the top-level regardless whether the event is accepted or not. It will only stop propagating with the Qt.WA_NoMousePropagation 属性。
In this case the events will occur in the following way:
| 参数： |
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Constructs a hover event object.
type 参数必须是 QEvent.HoverEnter , QEvent.HoverLeave ，或 QEvent.HoverMove .
pos is the current mouse cursor's position relative to the receiving widget, while oldPos is the previous mouse cursor's position relative to the receiving widget.
| 返回类型： | PySide.QtCore.QPoint |
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Returns the previous position of the mouse cursor, relative to the widget that received the event. If there is no previous position, PySide.QtGui.QHoverEvent.oldPos() will return the same position as PySide.QtGui.QHoverEvent.pos() .
On QEvent.HoverEnter events, this position will always be PySide.QtCore.QPoint (-1, -1).
| 返回类型： | PySide.QtCore.QPoint |
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Returns the position of the mouse cursor, relative to the widget that received the event.
On QEvent.HoverLeave events, this position will always be PySide.QtCore.QPoint (-1, -1).
