本文实例为大家分享了Qt实现图形裁减的具体代码，供大家参考，具体内容如下
main.cpp
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#include <QApplication>#include <QGraphicsItemGroup>#include <QGraphicsView>#include <QPushButton>#include <QVBoxLayout>class GraphicsItemGroup : public QGraphicsItemGroup{public: GraphicsItemGroup(QGraphicsItem *parent = 0) : QGraphicsItemGroup(parent) { setFlag(QGraphicsItem::ItemClipsChildrenToShape, true); } QPainterPath shape() const { if (mShape.isEmpty()) return QGraphicsItemGroup::shape(); return mShape; } void setShape(const QPainterPath &shape) { mShape = shape; update(); }private: QPainterPath mShape;};int main(int argc, char *argv[]){ QApplication a(argc, argv); QWidget w; w.setLayout(new QVBoxLayout); QGraphicsView view; QPushButton button("click me"); w.layout()->addWidget(&view); w.layout()->addWidget(&button); view.setScene(new QGraphicsScene); GraphicsItemGroup group; view.scene()->addItem(&group); auto ellipse = new QGraphicsEllipseItem(QRectF(0, 0, 100, 100)); ellipse->setBrush(Qt::red); auto rect = new QGraphicsRectItem(QRect(150, 150, 100, 100)); rect->setBrush(Qt::blue); group.addToGroup(ellipse); group.addToGroup(rect); QObject::connect(&button, &QPushButton::clicked, [&group]() { QPainterPath shape; if (group.shape().boundingRect() == group.boundingRect()) { shape.addRect(0, 50, 250, 150); } group.setShape(shape); }); w.show(); return a.exec();} |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/TM1695648164/article/details/119641556
