c++ - 如何处理QPainter的边界矩形单击

Question

现在，我使用QPainterPath绘制我的自定义窗口小部件并旋转技术，此处列出了代码段:

QRectF flowerBanRect(-radius + (-width / 2), -radius + (-margin) + (-height), width, height);
QPainterPath flowerPath;
flowerPath.moveTo(-radius + (-width / 4), -diameter + (-margin));
flowerPath.lineTo(-radius + width / 4, -diameter + (-margin));
flowerPath.lineTo(-radius + width / 2, -diameter + (-margin) + (-height));
flowerPath.lineTo(-radius + (-width / 2), -diameter + (-margin) + (-height));

QPainterPath diffPath = flowerPath - headPath;

painter->setBrush(QBrush(getReagentSeatColor(0)));
painter->fillPath(diffPath, QBrush(getReagentSeatColor(0)));
painter->drawText(flowerBanRect, Qt::AlignHCenter | Qt::AlignTop, QString("01"));
painter->save();

float degree = 360.0 / MAX_TRAY;
for (int i = 0; i < MAX_TRAY - 1; ++i) {
    painter->rotate(degree);
    painter->setBrush(QBrush(getReagentSeatColor(i + 1)));
    painter->fillPath(diffPath, QBrush(getReagentSeatColor(i + 1)));
    painter->drawText(flowerBanRect, Qt::AlignHCenter | Qt::AlignTop, QString("%1").arg(i + 2, 2, 10, QChar('0')));
}

但是现在，我如何处理 每隔单击。

Answer 1

最好的方法是像这样在类中重写QWidget的mousePressEvent。

void mousePressEvent(QMouseEvent *event) override;

然后，您调用想要从 QMouseEvent doc获取位置的任何函数，但我建议您使用event-> pos()，因为它会返回相对于您从中调用它的小部件的位置。您可以在运行时计算每个扇区的位置，也可以将它们存储在QList或QMap中。然后比较位置并找出鼠标所在的扇区。