QGraphicsSceneContextMenuEvent 类

QGraphicsSceneContextMenuEvent 类在图形视图框架中提供上下文菜单事件。更多...

头：	#include <QGraphicsSceneContextMenuEvent>
qmake:	QT += widgets
Since:	Qt 4.2
继承：	QGraphicsSceneEvent

该类在 Qt 4.2 引入。

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公共类型

enum	Reason { Mouse, Keyboard, Other }

公共函数

virtual	~QGraphicsSceneContextMenuEvent ()
Qt::KeyboardModifiers	modifiers () const
QPointF	pos () const
QGraphicsSceneContextMenuEvent::Reason	reason () const
QPointF	scenePos () const
QPoint	screenPos () const

详细描述

A QContextMenuEvent 接收通过 QGraphicsView 被翻译成 QGraphicsSceneContextMenuEvent。 QContextMenuEvent::globalPos () 被翻译成项、场景及屏幕坐标 ( pos (), scenePos ()，和 screenPos ()).

另请参阅 QGraphicsSceneMouseEvent , QGraphicsSceneWheelEvent ，和 QContextMenuEvent .

成员类型文档编制

enum QGraphicsSceneContextMenuEvent:: Reason

此枚举描述为什么发送上下文事件的原因。

常量	值	描述
`QGraphicsSceneContextMenuEvent::Mouse`	`0`	The mouse caused the event to be sent. On most platforms, this means the right mouse button was clicked.
`QGraphicsSceneContextMenuEvent::Keyboard`	`1`	The keyboard caused this event to be sent. On Windows and macOS, this means the menu button was pressed.
`QGraphicsSceneContextMenuEvent::Other`	`2`	事件是通过某些其它手段发送的 (即：不通过鼠标或键盘)。

成员函数文档编制

`[虚拟]` QGraphicsSceneContextMenuEvent:: ~QGraphicsSceneContextMenuEvent ()

销毁事件。

Qt::KeyboardModifiers QGraphicsSceneContextMenuEvent:: modifiers () const

Returns the keyboard modifiers in use when the context menu was requested.

QPointF QGraphicsSceneContextMenuEvent:: pos () const

Returns the position of the mouse cursor in item coordinates at the moment the context menu was requested.

另请参阅 scenePos () 和 screenPos ().

QGraphicsSceneContextMenuEvent::Reason QGraphicsSceneContextMenuEvent:: reason () const

Returns the reason for the context menu event.

另请参阅 QGraphicsSceneContextMenuEvent::Reason .

QPointF QGraphicsSceneContextMenuEvent:: scenePos () const

Returns the position of the mouse cursor in scene coordinates at the moment the context menu was requested.

另请参阅 pos () 和 screenPos ().

QPoint QGraphicsSceneContextMenuEvent:: screenPos () const

Returns the position of the mouse cursor in screen coordinates at the moment the context menu was requested.

另请参阅 pos () 和 scenePos ().