QGraphicsSceneWheelEvent 类

QGraphicsSceneWheelEvent 类提供在图形视图框架中的滚轮事件。 更多...

头：	#include <QGraphicsSceneWheelEvent>
CMake:	find_package(Qt6 REQUIRED COMPONENTS Widgets) target_link_libraries(mytarget PRIVATE Qt6::Widgets)
qmake:	QT += widgets
继承：	QGraphicsSceneEvent

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公共函数

virtual	~QGraphicsSceneWheelEvent ()
Qt::MouseButtons	buttons () const
int	delta () const
(从 6.2 起) bool	isInverted () const
Qt::KeyboardModifiers	modifiers () const
Qt::Orientation	orientation () const
(从 6.2 起) Qt::ScrollPhase	phase () const
(从 6.2 起) QPoint	pixelDelta () const
QPointF	pos () const
QPointF	scenePos () const
QPoint	screenPos () const

详细描述

QWheelEvent 接收通过 QGraphicsView are translated into QGraphicsSceneWheelEvents; it translates the QWheelEvent::globalPos() into item, scene, and screen coordinates ( pos (), scenePos ()，和 screenPos ()).

另请参阅 QGraphicsSceneMouseEvent , QGraphicsSceneContextMenuEvent , QGraphicsSceneHoverEvent ，和 QWheelEvent .

成员函数文档编制

[virtual noexcept] QGraphicsSceneWheelEvent:: ~QGraphicsSceneWheelEvent ()

销毁 QGraphicsSceneWheelEvent .

Qt::MouseButtons QGraphicsSceneWheelEvent:: buttons () const

Returns the mouse buttons that were pressed when the wheel event occurred.

另请参阅 modifiers ().

int QGraphicsSceneWheelEvent:: delta () const

Returns the distance that the wheel is rotated, in eighths (1/8s) of a degree. A positive value indicates that the wheel was rotated forwards away from the user; a negative value indicates that the wheel was rotated backwards toward the user.

Most mouse types work in steps of 15 degrees, in which case the delta value is a multiple of 120 (== 15 * 8).

[since 6.2] bool QGraphicsSceneWheelEvent:: isInverted () const

返回随事件交付的增量值是否反转。

该函数在 Qt 6.2 引入。

Qt::KeyboardModifiers QGraphicsSceneWheelEvent:: modifiers () const

Returns the keyboard modifiers that were active when the wheel event occurred.

另请参阅 buttons ().

Qt::Orientation QGraphicsSceneWheelEvent:: orientation () const

返回滚轮取向。

[since 6.2] Qt::ScrollPhase QGraphicsSceneWheelEvent:: phase () const

返回此滚轮事件的卷动阶段。

该函数在 Qt 6.2 引入。

另请参阅 QWheelEvent::phase .

[since 6.2] QPoint QGraphicsSceneWheelEvent:: pixelDelta () const

返回以屏幕像素为单位的卷动距离。此值由支持基于高分辨率像素的增量值的平台 (譬如 macOS) 提供。应该将值直接用于卷动屏幕内容。

该函数在 Qt 6.2 引入。

另请参阅 QWheelEvent::pixelDelta .

QPointF QGraphicsSceneWheelEvent:: pos () const

Returns the position of the cursor in item coordinates when the wheel event occurred.

另请参阅 scenePos () 和 screenPos ().

QPointF QGraphicsSceneWheelEvent:: scenePos () const

Returns the position of the cursor in scene coordinates when the wheel event occurred.

另请参阅 pos () 和 screenPos ().

QPoint QGraphicsSceneWheelEvent:: screenPos () const

Returns the position of the cursor in screen coordinates when the wheel event occurred.

另请参阅 pos () 和 scenePos ().

内容

• 公共函数

• 详细描述