QHoverEvent ¶

概要 ¶

详细描述 ¶

Mouse events occur when a mouse cursor is moved into, out of, or within a widget, and if the widget has the WA_Hover 属性。

函数 pos() gives the current cursor position, while oldPos() gives the old mouse position.

There are a few similarities between the events HoverEnter and HoverLeave , and the events Enter and Leave . However, they are slightly different because we do an update() in the event handler of HoverEnter and HoverLeave .

HoverMove is also slightly different from 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 MouseMove events:

1. A::MouseMove

2. B::MouseMove

3. C::MouseMove

You will get the same events for 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 WA_NoMousePropagation 属性。

In this case the events will occur in the following way:

1. A::HoverMove

2. A::HoverMove, B::HoverMove

3. A::HoverMove, B::HoverMove, C::HoverMove

class QHoverEvent ( type , pos , oldPos [ , modifiers=Qt.NoModifier ] ) ¶

param type

Type

param modifiers

KeyboardModifiers

param pos

QPointF

param oldPos

QPointF

Constructs a hover event object.

type 参数必须是 HoverEnter , HoverLeave ，或 HoverMove .

pos is the current mouse cursor’s position relative to the receiving widget, while oldPos is its previous such position. modifiers hold the state of all keyboard modifiers at the time of the event.

PySide2.QtGui.QHoverEvent. oldPos ( ) ¶

返回类型

QPoint

Returns the previous position of the mouse cursor, relative to the widget that received the event. If there is no previous position, will return the same position as pos() .

On HoverEnter events, this position will always be QPoint (-1, -1).

另请参阅

pos()

PySide2.QtGui.QHoverEvent. oldPosF ( ) ¶

返回类型

QPointF

Returns the previous position of the mouse cursor, relative to the widget that received the event. If there is no previous position, will return the same position as posF() .

On HoverEnter events, this position will always be QPointF (-1, -1).

另请参阅

posF()

PySide2.QtGui.QHoverEvent. pos ( ) ¶

返回类型

QPoint

Returns the position of the mouse cursor, relative to the widget that received the event.

On HoverLeave events, this position will always be QPoint (-1, -1).

另请参阅

oldPos()

PySide2.QtGui.QHoverEvent. posF ( ) ¶

返回类型

QPointF

Returns the position of the mouse cursor, relative to the widget that received the event.

On HoverLeave events, this position will always be QPointF (-1, -1).

另请参阅

oldPosF()