QGraphicsEllipseItem Class▲
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Header: QGraphicsEllipseItem
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CMake:
find_package(Qt6 REQUIRED COMPONENTS Widgets)
target_link_libraries(mytarget PRIVATE Qt6::Widgets)
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qmake: QT += widgets
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Inherits: QAbstractGraphicsShapeItem
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Group: QGraphicsEllipseItem is part of graphicsview-api
Detailed Description▲
QGraphicsEllipseItem respresents an ellipse with a fill and an outline, and you can also use it for ellipse segments (see startAngle(), spanAngle()).
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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▲
Member Type Documentation▲
enum QGraphicsEllipseItem::anonymous▲
The value returned by the virtual type() function.
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Constant |
Value |
Description |
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QGraphicsEllipseItem::Type |
4 |
A graphics ellipse item |
Member Function Documentation▲
void QGraphicsEllipseItem::setRect(qreal x, qreal y, qreal width, qreal height)▲
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▲
See also rect()
[explicit] QGraphicsEllipseItem::QGraphicsEllipseItem(QGraphicsItem *parent = nullptr)▲
Constructs a QGraphicsEllipseItem. parent is passed to QAbstractGraphicsShapeItem's constructor.
See Also▲
See also QGraphicsScene::addItem()
[explicit] QGraphicsEllipseItem::QGraphicsEllipseItem(const QRectF &rect, QGraphicsItem *parent = nullptr)▲
Constructs a QGraphicsEllipseItem using rect as the default rectangle. parent is passed to QAbstractGraphicsShapeItem's constructor.
See Also▲
See also QGraphicsScene::addItem()
[explicit] QGraphicsEllipseItem::QGraphicsEllipseItem(qreal x, qreal y, qreal width, qreal height, QGraphicsItem *parent = nullptr)▲
Constructs a QGraphicsEllipseItem using the rectangle defined by (x, y) and the given width and height, as the default rectangle. parent is passed to QAbstractGraphicsShapeItem's constructor.
See Also▲
See also QGraphicsScene::addItem()
[virtual] QGraphicsEllipseItem::~QGraphicsEllipseItem()▲
Destroys the QGraphicsEllipseItem.
[override virtual] QRectF QGraphicsEllipseItem::boundingRect() const▲
Reimplements: QGraphicsItem::boundingRect() const.
[override virtual] bool QGraphicsEllipseItem::contains(const QPointF &point) const▲
Reimplements: QGraphicsItem::contains(const QPointF &point) const.
[override virtual] bool QGraphicsEllipseItem::isObscuredBy(const QGraphicsItem *item) const▲
[override virtual] QPainterPath QGraphicsEllipseItem::opaqueArea() const▲
Reimplements: QAbstractGraphicsShapeItem::opaqueArea() const.
[override virtual] void QGraphicsEllipseItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = nullptr)▲
Reimplements: QGraphicsItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget).
QRectF QGraphicsEllipseItem::rect() const▲
Returns the item's ellipse geometry as a QRectF.
See Also▲
See also setRect(), QPainter::drawEllipse()
void QGraphicsEllipseItem::setRect(const 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▲
See also rect(), QPainter::drawEllipse()
void QGraphicsEllipseItem::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▲
See also spanAngle(), setStartAngle(), QPainter::drawPie()
void QGraphicsEllipseItem::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▲
See also startAngle(), setSpanAngle(), QPainter::drawPie()
[override virtual] QPainterPath QGraphicsEllipseItem::shape() const▲
Reimplements: QGraphicsItem::shape() const.
int QGraphicsEllipseItem::spanAngle() const▲
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▲
See also setSpanAngle(), startAngle()
int QGraphicsEllipseItem::startAngle() const▲
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▲
See also setStartAngle(), spanAngle()
[override virtual] int QGraphicsEllipseItem::type() const▲
Reimplements: QGraphicsItem::type() const.