The QGraphicsPolygonItem class provides a polygon item that you can add to a QGraphicsScene. More...
| Header: | #include <QGraphicsPolygonItem> |
| qmake: | QT += widgets |
| Since: | Qt 4.2 |
| Inherits: | QAbstractGraphicsShapeItem |
| enum | anonymous { Type } |
| QGraphicsPolygonItem(QGraphicsItem *parent = nullptr) | |
| QGraphicsPolygonItem(const QPolygonF &polygon, QGraphicsItem *parent = nullptr) | |
| virtual | ~QGraphicsPolygonItem() |
| Qt::FillRule | fillRule() const |
| QPolygonF | polygon() const |
| void | setFillRule(Qt::FillRule rule) |
| void | setPolygon(const QPolygonF &polygon) |
| virtual QRectF | boundingRect() const override |
| virtual bool | contains(const QPointF &point) const override |
| virtual bool | isObscuredBy(const QGraphicsItem *item) const override |
| virtual QPainterPath | opaqueArea() const override |
| virtual void | paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = nullptr) override |
| virtual QPainterPath | shape() const override |
| virtual int | type() const override |
The QGraphicsPolygonItem class provides a polygon item that you can add to a QGraphicsScene.
To set the item's polygon, pass a QPolygonF to QGraphicsPolygonItem's constructor, or call the setPolygon() function. The polygon() function returns the current polygon.
QGraphicsPolygonItem uses the polygon and the pen width to provide a reasonable implementation of boundingRect(), shape(), and contains(). The paint() function draws the polygon using the item's associated pen and brush, which you can set by calling the setPen() and setBrush() functions.
See also QGraphicsPathItem, QGraphicsRectItem, QGraphicsEllipseItem, QGraphicsTextItem, QGraphicsLineItem, QGraphicsPixmapItem, and Graphics View Framework.
The value returned by the virtual type() function.
| Constant | Value | Description |
|---|---|---|
QGraphicsPolygonItem::Type |
5 |
A graphics polygon item |
Constructs a QGraphicsPolygonItem. parent is passed to QAbstractGraphicsShapeItem's constructor.
See also QGraphicsScene::addItem().
Constructs a QGraphicsPolygonItem with polygon as the default polygon. parent is passed to QAbstractGraphicsShapeItem's constructor.
See also QGraphicsScene::addItem().
[virtual] QGraphicsPolygonItem::~QGraphicsPolygonItem()Destroys the QGraphicsPolygonItem.
[override virtual] QRectF QGraphicsPolygonItem::boundingRect() constReimplemented from QGraphicsItem::boundingRect().
[override virtual] bool QGraphicsPolygonItem::contains(const QPointF &point) constReimplemented from QGraphicsItem::contains().
Returns the fill rule of the polygon. The default fill rule is Qt::OddEvenFill.
See also setFillRule(), QPainterPath::fillRule(), and QPainter::drawPolygon().
[override virtual] bool QGraphicsPolygonItem::isObscuredBy(const QGraphicsItem *item) constReimplemented from QAbstractGraphicsShapeItem::isObscuredBy().
[override virtual] QPainterPath QGraphicsPolygonItem::opaqueArea() constReimplemented from QAbstractGraphicsShapeItem::opaqueArea().
[override virtual] void QGraphicsPolygonItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = nullptr)Reimplemented from QGraphicsItem::paint().
Returns the item's polygon, or an empty polygon if no polygon has been set.
See also setPolygon().
Sets the fill rule of the polygon to rule. The default fill rule is Qt::OddEvenFill.
See also fillRule(), QPainterPath::fillRule(), and QPainter::drawPolygon().
Sets the item's polygon to be the given polygon.
See also polygon().
[override virtual] QPainterPath QGraphicsPolygonItem::shape()
constReimplemented from QGraphicsItem::shape().
[override virtual] int QGraphicsPolygonItem::type() constReimplemented from QGraphicsItem::type().
