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QGraphicsSceneMouseEvent Class

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

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QGraphicsSceneMouseEvent Class

  • Header: QGraphicsSceneMouseEvent

  • CMake:

    find_package(Qt6 REQUIRED COMPONENTS Widgets)

    target_link_libraries(mytarget PRIVATE Qt6::Widgets)

  • qmake: QT += widgets

  • Inherits: QGraphicsSceneEvent

  • Group: QGraphicsSceneMouseEvent is part of graphicsview-api

Detailed Description

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().

See Also

Member Function Documentation

 

[virtual] QGraphicsSceneMouseEvent::~QGraphicsSceneMouseEvent()

Destroys the event.

Qt::MouseButton QGraphicsSceneMouseEvent::button() const

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

See Also

See also buttons(), modifiers()

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

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

See Also

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

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

See Also

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

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

See Also

Qt::MouseButtons QGraphicsSceneMouseEvent::buttons() const

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

See Also

See also button(), modifiers()

[since 5.4] 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.

See Also

QPointF QGraphicsSceneMouseEvent::lastPos() const

Returns the last recorded mouse cursor position in item coordinates.

See Also

See also lastScenePos(), lastScreenPos(), 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.

See Also

See also lastPos(), lastScreenPos(), 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.

See Also

See also lastPos(), lastScenePos(), screenPos()

Qt::KeyboardModifiers QGraphicsSceneMouseEvent::modifiers() const

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

See Also

See also buttons(), button()

QPointF QGraphicsSceneMouseEvent::pos() const

Returns the mouse cursor position in item coordinates.

See Also

See also scenePos(), screenPos(), lastPos()

QPointF QGraphicsSceneMouseEvent::scenePos() const

Returns the mouse cursor position in scene coordinates.

See Also

See also pos(), screenPos(), lastScenePos()

QPoint QGraphicsSceneMouseEvent::screenPos() const

Returns the mouse cursor position in screen coordinates.

See Also

See also pos(), scenePos(), lastScreenPos()

[since 5.4] 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.

This function was introduced in Qt 5.4.

See Also

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