QGraphicsSceneMouseEvent

Qt 5.9.0 Reference Documentation

QGraphicsSceneMouseEvent Class

The QGraphicsSceneMouseEvent class provides mouse events in the graphics view framework. 更多...

头文件:	#include <QGraphicsSceneMouseEvent>
qmake:	QT += widgets
开始支持版本:	Qt 4.2
基类:	QGraphicsSceneEvent

所有的成员列表, 包括继承的成员

公有函数

	~QGraphicsSceneMouseEvent()
Qt::MouseButton	button() const
QPointF	buttonDownPos(Qt::MouseButton button) const
QPointF	buttonDownScenePos(Qt::MouseButton button) const
QPoint	buttonDownScreenPos(Qt::MouseButton button) const
Qt::MouseButtons	buttons() const
Qt::MouseEventFlags	flags() const
QPointF	lastPos() const
QPointF	lastScenePos() const
QPoint	lastScreenPos() const
Qt::KeyboardModifiers	modifiers() const
QPointF	pos() const
QPointF	scenePos() const
QPoint	screenPos() const
Qt::MouseEventSource	source() const

1 个公有函数继承自 QGraphicsSceneEvent
6 个公有函数继承自 QEvent

其他继承的成员

1 个属性继承自 QEvent
1 个静态公有成员继承自 QEvent
2 个受保护的变量继承自 QEvent

详细描述

The QGraphicsSceneMouseEvent class provides mouse events in the graphics view framework.

When a QGraphicsView receives a QMouseEvent, it translates it to a QGraphicsSceneMouseEvent. The event is then forwarded to the QGraphicsScene associated with the view. If the event is not handled by the scene, the view may use it, e.g., for the DragMode.

In addition to containing the item, scene, and screen coordinates of the event (as pos(), scenePos(), and screenPos()), mouse events also contain the coordinates of the previous mouse event received by the view. These can be retrieved with lastPos(), lastScreenPos(), and lastScenePos().

参见 QGraphicsSceneContextMenuEvent, QGraphicsSceneHoverEvent, QGraphicsSceneWheelEvent, and QMouseEvent.

成员函数

QGraphicsSceneMouseEvent::~QGraphicsSceneMouseEvent()

Destroys the event.

Qt::MouseButton QGraphicsSceneMouseEvent::button() const

Returns the mouse button (if any) that caused the event.

参见 buttons() and modifiers().

QPointF QGraphicsSceneMouseEvent::buttonDownPos(Qt::MouseButton button) const

Returns the mouse cursor position in item coordinates where the specified button was clicked.

参见 buttonDownScenePos(), buttonDownScreenPos(), and pos().

QPointF QGraphicsSceneMouseEvent::buttonDownScenePos(Qt::MouseButton button) const

Returns the mouse cursor position in scene coordinates where the specified button was clicked.

参见 buttonDownPos(), buttonDownScreenPos(), and scenePos().

QPoint QGraphicsSceneMouseEvent::buttonDownScreenPos(Qt::MouseButton button) const

Returns the mouse cursor position in screen coordinates where the specified button was clicked.

参见 screenPos(), buttonDownPos(), and buttonDownScenePos().

Qt::MouseButtons QGraphicsSceneMouseEvent::buttons() const

Returns the combination of mouse buttons that were pressed at the time the event was sent.

参见 button() and modifiers().

Qt::MouseEventFlags QGraphicsSceneMouseEvent::flags() const

Returns the mouse event flags.

The mouse event flags provide additional information about a mouse event.

This function was introduced in Qt 5.4.

参见 Qt::MouseEventFlag and QMouseEvent::flags().

QPointF QGraphicsSceneMouseEvent::lastPos() const

Returns the last recorded mouse cursor position in item coordinates.

参见 lastScenePos(), lastScreenPos(), and pos().

QPointF QGraphicsSceneMouseEvent::lastScenePos() const

Returns the last recorded mouse cursor position in scene coordinates. The last recorded position is the position of the previous mouse event received by the view that created the event.

参见 lastPos(), lastScreenPos(), and scenePos().

QPoint QGraphicsSceneMouseEvent::lastScreenPos() const

Returns the last recorded mouse cursor position in screen coordinates. The last recorded position is the position of the previous mouse event received by the view that created the event.

参见 lastPos(), lastScenePos(), and screenPos().

Qt::KeyboardModifiers QGraphicsSceneMouseEvent::modifiers() const

Returns the keyboard modifiers in use at the time the event was sent.

参见 buttons() and button().

QPointF QGraphicsSceneMouseEvent::pos() const

Returns the mouse cursor position in item coordinates.

参见 scenePos(), screenPos(), and lastPos().

QPointF QGraphicsSceneMouseEvent::scenePos() const

Returns the mouse cursor position in scene coordinates.

参见 pos(), screenPos(), and lastScenePos().

QPoint QGraphicsSceneMouseEvent::screenPos() const

Returns the mouse cursor position in screen coordinates.

参见 pos(), scenePos(), and lastScreenPos().

Qt::MouseEventSource QGraphicsSceneMouseEvent::source() const

Returns information about the mouse event source.

The mouse event source can be used to distinguish between genuine and artificial mouse events. The latter are events that are synthesized from touch events by the operating system or Qt itself.