com.trolltech.qt.gui
Class QGraphicsEllipseItem

java.lang.Object
  extended by com.trolltech.qt.internal.QSignalEmitterInternal
      extended by com.trolltech.qt.QSignalEmitter
          extended by com.trolltech.qt.QtJambiObject
              extended by com.trolltech.qt.gui.QAbstractGraphicsShapeItem
                  extended by com.trolltech.qt.gui.QGraphicsEllipseItem
All Implemented Interfaces:
QGraphicsItemInterface, QtJambiInterface

public class QGraphicsEllipseItem
extends QAbstractGraphicsShapeItem

The QGraphicsEllipseItem class provides an ellipse item that you can add to a QGraphicsScene. QGraphicsEllipseItem respresents an ellipse with a fill and an outline, and you can also use it for ellipse segments (see startAngle(), spanAngle()).





To set the item's ellipse, pass a QRectF to QGraphicsEllipseItem's constructor, or call setRect(). The rect() function returns the current ellipse geometry.

QGraphicsEllipseItem uses the rect and the pen width to provide a reasonable implementation of boundingRect(), shape(), and contains(). The paint() function draws the ellipse using the item's associated pen and brush, which you can set by calling setPen() and setBrush().

See also:
QGraphicsPathItem, QGraphicsRectItem, QGraphicsPolygonItem, QGraphicsTextItem, QGraphicsLineItem, QGraphicsPixmapItem, and The Graphics View Framework.


Nested Class Summary
static class QGraphicsEllipseItem.enum_1
           
 
Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter
QSignalEmitter.AbstractSignal, QSignalEmitter.PrivateSignal0, QSignalEmitter.PrivateSignal1, QSignalEmitter.PrivateSignal2, QSignalEmitter.PrivateSignal3, QSignalEmitter.PrivateSignal4, QSignalEmitter.PrivateSignal5, QSignalEmitter.PrivateSignal6, QSignalEmitter.PrivateSignal7, QSignalEmitter.PrivateSignal8, QSignalEmitter.PrivateSignal9, QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9
 
Nested classes/interfaces inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal
 
Field Summary
 
Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
currentSender
 
Constructor Summary
QGraphicsEllipseItem()
          Constructs a QGraphicsEllipseItem.
QGraphicsEllipseItem(double x, double y, double w, double h)
          Creates a new QGraphicsEllipseItem with top left corner in the point (x, y), width w.
QGraphicsEllipseItem(double x, double y, double w, double h, QGraphicsItemInterface parent)
          Creates a new QGraphicsEllipseItem with top left corner in the point (x, y), width w, and height h, and the specified parent.
QGraphicsEllipseItem(double x, double y, double w, double h, QGraphicsItemInterface parent, QGraphicsScene scene)
          Creates a new QGraphicsEllipseItem with top left corner in the point (x, y), width w, and height h, and the specified parent.
QGraphicsEllipseItem(QGraphicsItemInterface parent)
          Constructs a QGraphicsEllipseItem.
QGraphicsEllipseItem(QGraphicsItemInterface parent, QGraphicsScene scene)
          Constructs a QGraphicsEllipseItem.
QGraphicsEllipseItem(QRectF rect)
          tes a new QGraphicsEllipseItem with the specified rect bounds.
QGraphicsEllipseItem(QRectF rect, QGraphicsItemInterface parent)
          Creates a new QGraphicsEllipseItem with the specified rect bounds and parent.
QGraphicsEllipseItem(QRectF rect, QGraphicsItemInterface parent, QGraphicsScene scene)
          Creates a new QGraphicsEllipseItem with the specified rect bounds and parent, and then adds it to scene.
 
Method Summary
 QRectF rect()
          Returns the item's ellipse geometry as a QRectF.
 void setRect(double x, double y, double w, double h)
          Sets the item's rectangle to the rectangle defined by (x, y) and the given width and height.
 void setRect(QRectF rect)
          Sets the item's ellipse geometry to rect.
 void setSpanAngle(int angle)
          Sets the span angle for an ellipse segment to angle, which is in 16ths of a degree.
 void setStartAngle(int angle)
          Sets the start angle for an ellipse segment to angle, which is in 16ths of a degree.
 int spanAngle()
          Returns the span angle of an ellipse segment in 16ths of a degree.
 int startAngle()
          Returns the start angle for an ellipse segment in 16ths of a degree.
 
Methods inherited from class com.trolltech.qt.gui.QAbstractGraphicsShapeItem
acceptDrops, acceptedMouseButtons, acceptHoverEvents, acceptsHoverEvents, advance, boundingRect, boundingRegion, boundingRegionGranularity, brush, cacheMode, childItems, childrenBoundingRect, clearFocus, clipPath, collidesWithItem, collidesWithPath, collidingItems, commonAncestorItem, contains, contextMenuEvent, cursor, data, deviceTransform, dragEnterEvent, dragLeaveEvent, dragMoveEvent, dropEvent, effectiveOpacity, ensureVisible, ensureVisible, flags, focusInEvent, focusOutEvent, grabKeyboard, grabMouse, group, handlesChildEvents, hasCursor, hasFocus, hide, hoverEnterEvent, hoverLeaveEvent, hoverMoveEvent, inputMethodEvent, inputMethodQuery, installSceneEventFilter, isAncestorOf, isClipped, isEnabled, isObscured, isObscured, isObscured, isObscuredBy, isSelected, isUnderMouse, isVisible, isVisibleTo, isWidget, isWindow, itemChange, itemTransform, keyPressEvent, keyReleaseEvent, mapFromItem, mapFromItem, mapFromItem, mapFromItem, mapFromItem, mapFromItem, mapFromParent, mapFromParent, mapFromParent, mapFromParent, mapFromParent, mapFromParent, mapFromScene, mapFromScene, mapFromScene, mapFromScene, mapFromScene, mapFromScene, mapRectFromItem, mapRectFromItem, mapRectFromParent, mapRectFromParent, mapRectFromScene, mapRectFromScene, mapRectToItem, mapRectToItem, mapRectToParent, mapRectToParent, mapRectToScene, mapRectToScene, mapToItem, mapToItem, mapToItem, mapToItem, mapToItem, mapToItem, mapToParent, mapToParent, mapToParent, mapToParent, mapToParent, mapToParent, mapToScene, mapToScene, mapToScene, mapToScene, mapToScene, mapToScene, mouseDoubleClickEvent, mouseMoveEvent, mousePressEvent, mouseReleaseEvent, moveBy, opacity, opaqueArea, paint, parentItem, parentWidget, pen, pos, prepareGeometryChange, removeSceneEventFilter, resetTransform, rotate, scale, scene, sceneBoundingRect, sceneEvent, sceneEventFilter, scenePos, sceneTransform, scroll, setAcceptDrops, setAcceptedMouseButtons, setAcceptHoverEvents, setAcceptsHoverEvents, setBoundingRegionGranularity, setBrush, setCacheMode, setCursor, setData, setEnabled, setFlag, setFlags, setFocus, setGroup, setHandlesChildEvents, setOpacity, setParentItem, setPen, setPos, setPos, setSelected, setToolTip, setTransform, setVisible, setZValue, shape, shear, show, toolTip, topLevelItem, topLevelWidget, transform, translate, type, ungrabKeyboard, ungrabMouse, unsetCursor, update, update, wheelEvent, window, x, y, zValue
 
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 com.trolltech.qt.internal.QSignalEmitterInternal
__qt_signalInitialization
 
Methods inherited from class java.lang.Object
clone, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface com.trolltech.qt.QtJambiInterface
disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership
 

Constructor Detail

QGraphicsEllipseItem

public QGraphicsEllipseItem(QGraphicsItemInterface parent)
Constructs a QGraphicsEllipseItem. parent is passed to QAbstractGraphicsShapeItem's constructor. The item is then added to scene.

See also:
QGraphicsScene::addItem().


QGraphicsEllipseItem

public QGraphicsEllipseItem()
Constructs a QGraphicsEllipseItem. parent is passed to QAbstractGraphicsShapeItem's constructor. The item is then added to scene.

See also:
QGraphicsScene::addItem().


QGraphicsEllipseItem

public QGraphicsEllipseItem(QGraphicsItemInterface parent,
                            QGraphicsScene scene)
Constructs a QGraphicsEllipseItem. parent is passed to QAbstractGraphicsShapeItem's constructor. The item is then added to scene.

See also:
QGraphicsScene::addItem().


QGraphicsEllipseItem

public QGraphicsEllipseItem(QRectF rect,
                            QGraphicsItemInterface parent)
Creates a new QGraphicsEllipseItem with the specified rect bounds and parent.


QGraphicsEllipseItem

public QGraphicsEllipseItem(QRectF rect)
tes a new QGraphicsEllipseItem with the specified rect bounds.


QGraphicsEllipseItem

public QGraphicsEllipseItem(QRectF rect,
                            QGraphicsItemInterface parent,
                            QGraphicsScene scene)
Creates a new QGraphicsEllipseItem with the specified rect bounds and parent, and then adds it to scene.


QGraphicsEllipseItem

public QGraphicsEllipseItem(double x,
                            double y,
                            double w,
                            double h,
                            QGraphicsItemInterface parent)
Creates a new QGraphicsEllipseItem with top left corner in the point (x, y), width w, and height h, and the specified parent.


QGraphicsEllipseItem

public QGraphicsEllipseItem(double x,
                            double y,
                            double w,
                            double h)
Creates a new QGraphicsEllipseItem with top left corner in the point (x, y), width w.


QGraphicsEllipseItem

public QGraphicsEllipseItem(double x,
                            double y,
                            double w,
                            double h,
                            QGraphicsItemInterface parent,
                            QGraphicsScene scene)
Creates a new QGraphicsEllipseItem with top left corner in the point (x, y), width w, and height h, and the specified parent. It is then added to scene.

Method Detail

rect

public final QRectF rect()
Returns the item's ellipse geometry as a QRectF.

See also:
setRect(), and QPainter::drawEllipse().


setRect

public final void setRect(QRectF rect)
Sets the item's ellipse geometry to rect. The rectangle's left edge defines the left edge of the ellipse, and the rectangle's top edge describes the top of the ellipse. The height and width of the rectangle describe the height and width of the ellipse.

See also:
rect(), and QPainter::drawEllipse().


setRect

public final void setRect(double x,
                          double y,
                          double w,
                          double h)
Sets the item's rectangle to the rectangle defined by (x, y) and the given width and height.

This convenience function is equivalent to calling setRect(QRectF(x, y, width, height))

See also:
rect().


setSpanAngle

public final void setSpanAngle(int angle)
Sets the span angle for an ellipse segment to angle, which is in 16ths of a degree. This angle is used together with startAngle() to represent an ellipse segment (a pie). By default, the span angle is 5760 (360 * 16, a full ellipse).

See also:
spanAngle(), setStartAngle(), and QPainter::drawPie().


setStartAngle

public final void setStartAngle(int angle)
Sets the start angle for an ellipse segment to angle, which is in 16ths of a degree. This angle is used together with spanAngle() for representing an ellipse segment (a pie). By default, the start angle is 0.

See also:
startAngle(), setSpanAngle(), and QPainter::drawPie().


spanAngle

public final int spanAngle()
Returns the span angle of an ellipse segment in 16ths of a degree. This angle is used together with startAngle() for representing an ellipse segment (a pie). By default, this function returns 5760 (360 * 16, a full ellipse).

See also:
setSpanAngle(), and startAngle().


startAngle

public final int startAngle()
Returns the start angle for an ellipse segment in 16ths of a degree. This angle is used together with spanAngle() for representing an ellipse segment (a pie). By default, the start angle is 0.

See also:
setStartAngle(), and spanAngle().