QGraphicsPolygonItem Class
QGraphicsPolygonItem 类提供了一个多边形项，您可以将其添加到QGraphicsScene... 更多...
| Header： | #include <QGraphicsPolygonItem> |
| CMake： | find_package(Qt6 REQUIRED COMPONENTS Widgets)target_link_libraries(mytarget PRIVATE Qt6::Widgets) |
| qmake： | QT += widgets |
| 继承： | QAbstractGraphicsShapeItem |
公共类型
| enum | anonymous { Type } |
公共函数
| 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) |
重新实现的公共函数
| 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 |
详细说明
要设置项目的多边形，请将QPolygonF 传递给 QGraphicsPolygonItem 的构造函数，或调用setPolygon() 函数。polygon() 函数将返回当前多边形。
QGraphicsPolygonItem 使用多边形和笔宽来合理实现boundingRect(),shape(), 和contains().paint() 函数使用项的相关笔和笔刷绘制多边形，您可以通过调用setPen() 和setBrush() 函数设置笔和笔刷。
另请参阅 QGraphicsPathItem,QGraphicsRectItem,QGraphicsEllipseItem,QGraphicsTextItem,QGraphicsLineItem,QGraphicsPixmapItem 和图形视图框架。
成员类型文档
enum QGraphicsPolygonItem::anonymous
虚拟type() 函数返回的值。
| 常量 | 值 | 说明 |
|---|---|---|
QGraphicsPolygonItem::Type | 5 | 图形多边形项 |
成员函数文档
[explicit] QGraphicsPolygonItem::QGraphicsPolygonItem(QGraphicsItem *parent = nullptr)
构造一个 QGraphicsPolygonItem。parent 传递给QAbstractGraphicsShapeItem 的构造函数。
另请参阅 QGraphicsScene::addItem().
[explicit] QGraphicsPolygonItem::QGraphicsPolygonItem(const QPolygonF &polygon, QGraphicsItem *parent = nullptr)
构造一个 QGraphicsPolygonItem，默认多边形为polygon 。parent 将传递给QAbstractGraphicsShapeItem 的构造函数。
另请参阅 QGraphicsScene::addItem().
[virtual noexcept] QGraphicsPolygonItem::~QGraphicsPolygonItem()
[override virtual] QRectF QGraphicsPolygonItem::boundingRect() const
重实现：QGraphicsItem::boundingRect() const.
[override virtual] bool QGraphicsPolygonItem::contains(const QPointF &point) const
重实现：QGraphicsItem::contains(const QPointF &point) const.
Qt::FillRule QGraphicsPolygonItem::fillRule() const
返回多边形的填充规则。默认填充规则是Qt::OddEvenFill 。
另请参阅 setFillRule()、QPainterPath::fillRule() 和QPainter::drawPolygon()。
[override virtual] bool QGraphicsPolygonItem::isObscuredBy(const QGraphicsItem *item) const
重实现：QAbstractGraphicsShapeItem::isObscuredBy(const QGraphicsItem *item) const.
[override virtual] QPainterPath QGraphicsPolygonItem::opaqueArea() const
重实现：QAbstractGraphicsShapeItem::opaqueArea() const.
[override virtual] void QGraphicsPolygonItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = nullptr)
重实现：QGraphicsItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)。
QPolygonF QGraphicsPolygonItem::polygon() const
返回项目的多边形，如果没有设置多边形，则返回空多边形。
另请参阅 setPolygon()。
void QGraphicsPolygonItem::setFillRule(Qt::FillRule rule)
将多边形的填充规则设置为rule 。默认填充规则为Qt::OddEvenFill 。
另请参阅 fillRule()、QPainterPath::fillRule() 和QPainter::drawPolygon()。
void QGraphicsPolygonItem::setPolygon(const QPolygonF &polygon)
将项目的多边形设置为给定的polygon 。
另请参阅 polygon()。
[override virtual] QPainterPath QGraphicsPolygonItem::shape() const
重实现：QGraphicsItem::shape() const.
[override virtual] int QGraphicsPolygonItem::type() const
重实现：QGraphicsItem::type() const.
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