QGraphicsSceneMouseEvent Class Reference

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

 #include <QGraphicsSceneMouseEvent>

Inherits: QGraphicsSceneEvent.

This class was introduced in Qt 4.2.

Public Functions

~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
QPointF lastPos () const
QPointF lastScenePos () const
QPoint lastScreenPos () const
Qt::KeyboardModifiers modifiers () const
QPointF pos () const
QPointF scenePos () const
QPoint screenPos () const

Additional Inherited Members

  • 1 property inherited from QEvent
  • 1 static public member inherited from QEvent

Detailed Description

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().

See also QGraphicsSceneContextMenuEvent, QGraphicsSceneHoverEvent, QGraphicsSceneWheelEvent, and QMouseEvent.

Member Function Documentation

QGraphicsSceneMouseEvent::~QGraphicsSceneMouseEvent ()

Destroys the event.

Qt::MouseButton QGraphicsSceneMouseEvent::button () const

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

See also buttons() and modifiers().

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

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

See also 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.

See also 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.

See also 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.

See also button() and modifiers().

QPointF QGraphicsSceneMouseEvent::lastPos () const

Returns the last recorded mouse cursor position in item coordinates.

See also 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.

See also 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.

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

Qt::KeyboardModifiers QGraphicsSceneMouseEvent::modifiers () const

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

See also buttons() and button().

QPointF QGraphicsSceneMouseEvent::pos () const

Returns the mouse cursor position in item coordinates.

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

QPointF QGraphicsSceneMouseEvent::scenePos () const

Returns the mouse cursor position in scene coordinates.

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

QPoint QGraphicsSceneMouseEvent::screenPos () const

Returns the mouse cursor position in screen coordinates.

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

Notes provided by the Qt Community
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Votes: 0

Coverage: Qt 4.8

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17 notes

Coordinates returned by pos() may be undefined.

The coordinates returned by pos() may be undefined (an arbitrary value such as (0,0)), for example for an event received in a reimplemented event handler for QGraphicsScene, when there is no item under the cursor.

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