QGraphicsRectItem Class▲
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Header: QGraphicsRectItem
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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: QGraphicsRectItem is part of graphicsview-api
Detailed Description▲
To set the item's rectangle, pass a QRectF to QGraphicsRectItem's constructor, or call the setRect() function. The rect() function returns the current rectangle.
QGraphicsRectItem uses the rectangle and the pen width to provide a reasonable implementation of boundingRect(), shape(), and contains(). The paint() function draws the rectangle using the item's associated pen and brush, which you can set by calling the setPen() and setBrush() functions.
The rendering of invalid rectangles, such as those with negative widths or heights, is undefined. If you cannot be sure that you are using valid rectangles (for example, if you are creating rectangles using data from an unreliable source) then you should use QRectF::normalized() to create normalized rectangles, and use those instead.
See Also▲
Member Type Documentation▲
enum QGraphicsRectItem::anonymous▲
The value returned by the virtual type() function.
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Constant |
Value |
Description |
|---|---|---|
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QGraphicsRectItem::Type |
3 |
A graphics rect item |
Member Function Documentation▲
void QGraphicsRectItem::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] QGraphicsRectItem::QGraphicsRectItem(QGraphicsItem *parent = nullptr)▲
Constructs a QGraphicsRectItem. parent is passed to QAbstractGraphicsShapeItem's constructor.
See Also▲
See also QGraphicsScene::addItem()
[explicit] QGraphicsRectItem::QGraphicsRectItem(const QRectF &rect, QGraphicsItem *parent = nullptr)▲
Constructs a QGraphicsRectItem, using rect as the default rectangle. parent is passed to QAbstractGraphicsShapeItem's constructor.
See Also▲
See also QGraphicsScene::addItem()
[explicit] QGraphicsRectItem::QGraphicsRectItem(qreal x, qreal y, qreal width, qreal height, QGraphicsItem *parent = nullptr)▲
Constructs a QGraphicsRectItem with a default rectangle defined by (x, y) and the given width and height.
parent is passed to QAbstractGraphicsShapeItem's constructor.
See Also▲
See also QGraphicsScene::addItem()
[virtual] QGraphicsRectItem::~QGraphicsRectItem()▲
Destroys the QGraphicsRectItem.
[override virtual] QRectF QGraphicsRectItem::boundingRect() const▲
Reimplements: QGraphicsItem::boundingRect() const.
[override virtual] bool QGraphicsRectItem::contains(const QPointF &point) const▲
Reimplements: QGraphicsItem::contains(const QPointF &point) const.
[override virtual] bool QGraphicsRectItem::isObscuredBy(const QGraphicsItem *item) const▲
[override virtual] QPainterPath QGraphicsRectItem::opaqueArea() const▲
Reimplements: QAbstractGraphicsShapeItem::opaqueArea() const.
[override virtual] void QGraphicsRectItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = nullptr)▲
Reimplements: QGraphicsItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget).
QRectF QGraphicsRectItem::rect() const▲
void QGraphicsRectItem::setRect(const QRectF &rectangle)▲
[override virtual] QPainterPath QGraphicsRectItem::shape() const▲
Reimplements: QGraphicsItem::shape() const.
[override virtual] int QGraphicsRectItem::type() const▲
Reimplements: QGraphicsItem::type() const.