The QGraphicsPolygonItem class provides a polygon item that you can add to a QGraphicsScene. More...
| Header: | #include <QGraphicsPolygonItem> |
| CMake: | find_package(Qt6 REQUIRED COMPONENTS Widgets) target_link_libraries(mytarget PRIVATE Qt6::Widgets) |
| qmake: | QT += widgets |
| Inherits: | QAbstractGraphicsShapeItem |
| enum | anonymous { Type } |
| QGraphicsPolygonItem(const QPolygonF &polygon, QGraphicsItem *parent = nullptr) | |
| QGraphicsPolygonItem(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 |
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 with polygon as the default polygon. parent is passed to QAbstractGraphicsShapeItem's constructor.
See also QGraphicsScene::addItem().
Constructs a QGraphicsPolygonItem. parent is passed to QAbstractGraphicsShapeItem's constructor.
See also QGraphicsScene::addItem().
[virtual] QGraphicsPolygonItem::~QGraphicsPolygonItem()Destroys the QGraphicsPolygonItem.
[override virtual] QRectF QGraphicsPolygonItem::boundingRect() constReimplements: QGraphicsItem::boundingRect() const.
[override virtual] bool QGraphicsPolygonItem::contains(const QPointF
&point) constReimplements: QGraphicsItem::contains(const QPointF &point) const.
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) constReimplements: QAbstractGraphicsShapeItem::isObscuredBy(const QGraphicsItem *item) const.
[override virtual] QPainterPath QGraphicsPolygonItem::opaqueArea() constReimplements: QAbstractGraphicsShapeItem::opaqueArea() const.
[override virtual] void QGraphicsPolygonItem::paint(QPainter *painter,
const QStyleOptionGraphicsItem *option, QWidget *widget = nullptr)Reimplements: QGraphicsItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget).
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() constReimplements: QGraphicsItem::shape() const.
[override virtual] int QGraphicsPolygonItem::type() constReimplements: QGraphicsItem::type() const.
