com.trolltech.qt.gui
Class QGraphicsSceneEvent

java.lang.Object
  com.trolltech.qt.QSignalEmitter
      com.trolltech.qt.QtJambiObject
          com.trolltech.qt.core.QEvent
              com.trolltech.qt.gui.QGraphicsSceneEvent

All Implemented Interfaces:

QtJambiInterface

Direct Known Subclasses:

QGraphicsSceneContextMenuEvent, QGraphicsSceneDragDropEvent, QGraphicsSceneHelpEvent, QGraphicsSceneHoverEvent, QGraphicsSceneMouseEvent, QGraphicsSceneMoveEvent, QGraphicsSceneResizeEvent, QGraphicsSceneWheelEvent

public class QGraphicsSceneEvent
extends QEvent

The QGraphicsSceneEvent class provides a base class for all graphics view related events. When a QGraphicsView receives Qt mouse, keyboard, and drag and drop events (QMouseEvent, QKeyEvent, QDragEvent, etc.), it translates them into instances of QGraphicsSceneEvent subclasses and forwards them to the QGraphicsScene it displays. The scene then forwards the events to the relevant items.

For example, when a QGraphicsView receives a QMouseEvent of type MousePress as a response to a user click, the view sends a QGraphicsSceneMouseEvent of type GraphicsSceneMousePress to the underlying QGraphicsScene through its mousePressEvent() function. The default QGraphicsScene::mousePressEvent() implementation determines which item was clicked and forwards the event to QGraphicsItem::mousePressEvent().

Subclasses such as QGraphicsSceneMouseEvent and QGraphicsSceneContextMenuEvent provide the coordinates from the original QEvent in screen, scene, and item coordinates (see screenPos(), scenePos(), and pos()). The item coordinates are set by the QGraphicsScene before it forwards the event to the event to a QGraphicsItem. The mouse events also add the possibility to retrieve the coordinates from the last event received by the view (see lastScreenPos(), lastScenePos(), and lastPos()).

See also:

QEvent.

Nested Class Summary

Nested classes/interfaces inherited from class com.trolltech.qt.core.QEvent

QEvent.Type

Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter

QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9

Method Summary

static QGraphicsSceneEvent	fromNativePointer(QNativePointer nativePointer) This method returns the QGraphicsSceneEvent instance pointed to by nativePointer.
java.lang.String	toString() Returns a string representation of the this QGraphicsSceneEvent.
QWidget	widget() Returns the widget where the event originated, or 0 if the event originates from another application.

Methods inherited from class com.trolltech.qt.core.QEvent

accept, ignore, isAccepted, registerEventType, registerEventType, setAccepted, setT, spontaneous, t, type

Methods inherited from class com.trolltech.qt.QtJambiObject

dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr

Methods inherited from class com.trolltech.qt.QSignalEmitter

blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread

Methods inherited from class java.lang.Object

clone, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.trolltech.qt.QtJambiInterface

disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership

Method Detail

widget

public final QWidget widget()

Returns the widget where the event originated, or 0 if the event originates from another application.

fromNativePointer

public static QGraphicsSceneEvent fromNativePointer(QNativePointer nativePointer)

This method returns the QGraphicsSceneEvent instance pointed to by nativePointer.

toString

public java.lang.String toString()

Returns a string representation of the this QGraphicsSceneEvent.

Overrides:

toString in class QEvent