QGraphicsPolygonItem Class
The QGraphicsPolygonItem class provides a polygon item that you can add to a QGraphicsScene. 更多...
| 头文件: | #include <QGraphicsPolygonItem> |
| qmake: | QT += widgets |
| 开始支持版本: | Qt 4.2 |
| 基类: | QAbstractGraphicsShapeItem |
公有函数
| QGraphicsPolygonItem(QGraphicsItem *parent = Q_NULLPTR) | |
| QGraphicsPolygonItem(const QPolygonF &polygon, QGraphicsItem *parent = Q_NULLPTR) | |
| ~QGraphicsPolygonItem() | |
| Qt::FillRule | fillRule() const |
| QPolygonF | polygon() const |
| void | setFillRule(Qt::FillRule rule) |
| void | setPolygon(const QPolygonF &polygon) |
重新实现的公有函数
| virtual QRectF | boundingRect() const |
| virtual bool | contains(const QPointF &point) const |
| virtual bool | isObscuredBy(const QGraphicsItem *item) const |
| virtual QPainterPath | opaqueArea() const |
| virtual void | paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = Q_NULLPTR) |
| virtual QPainterPath | shape() const |
| virtual int | type() const |
- 6 个公有函数继承自 QAbstractGraphicsShapeItem
- 176 个公有函数继承自 QGraphicsItem
其他继承的成员
- 2 个静态公有成员继承自 QGraphicsItem
- 24 个受保护的函数继承自 QGraphicsItem
详细描述
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.
参见 QGraphicsPathItem, QGraphicsRectItem, QGraphicsEllipseItem, QGraphicsTextItem, QGraphicsLineItem, QGraphicsPixmapItem, and Graphics View Framework.
成员函数
QGraphicsPolygonItem::QGraphicsPolygonItem(QGraphicsItem *parent = Q_NULLPTR)
Constructs a QGraphicsPolygonItem. parent is passed to QAbstractGraphicsShapeItem's constructor.
参见 QGraphicsScene::addItem().
QGraphicsPolygonItem::QGraphicsPolygonItem(const QPolygonF &polygon, QGraphicsItem *parent = Q_NULLPTR)
Constructs a QGraphicsPolygonItem with polygon as the default polygon. parent is passed to QAbstractGraphicsShapeItem's constructor.
参见 QGraphicsScene::addItem().
QGraphicsPolygonItem::~QGraphicsPolygonItem()
Destroys the QGraphicsPolygonItem.
[virtual] QRectF QGraphicsPolygonItem::boundingRect() const
重新实现 QGraphicsItem::boundingRect().
[virtual] bool QGraphicsPolygonItem::contains(const QPointF &point) const
重新实现 QGraphicsItem::contains().
Qt::FillRule QGraphicsPolygonItem::fillRule() const
Returns the fill rule of the polygon. The default fill rule is Qt::OddEvenFill.
参见 setFillRule(), QPainterPath::fillRule(), and QPainter::drawPolygon().
[virtual] bool QGraphicsPolygonItem::isObscuredBy(const QGraphicsItem *item) const
重新实现 QGraphicsItem::isObscuredBy().
[virtual] QPainterPath QGraphicsPolygonItem::opaqueArea() const
重新实现 QGraphicsItem::opaqueArea().
[virtual] void QGraphicsPolygonItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = Q_NULLPTR)
重新实现 QGraphicsItem::paint().
QPolygonF QGraphicsPolygonItem::polygon() const
Returns the item's polygon, or an empty polygon if no polygon has been set.
参见 setPolygon().
void QGraphicsPolygonItem::setFillRule(Qt::FillRule rule)
Sets the fill rule of the polygon to rule. The default fill rule is Qt::OddEvenFill.
参见 fillRule(), QPainterPath::fillRule(), and QPainter::drawPolygon().
void QGraphicsPolygonItem::setPolygon(const QPolygonF &polygon)
Sets the item's polygon to be the given polygon.
参见 polygon().
[virtual] QPainterPath QGraphicsPolygonItem::shape() const
重新实现 QGraphicsItem::shape().
[virtual] int QGraphicsPolygonItem::type() const
重新实现 QGraphicsItem::type().