重绘两边半圆中间矩形的疑问 - QTCN开发网

重绘两边半圆中间矩形的疑问

QPainterPath CWidget::makeSemicircleEdgeRectanglePath(QRect rect)
{
    int x = rect.x();
    int y = rect.y();
    int w = rect.width();
    int h = rect.height();
    int r = h/2;
    QPoint leftCenter(x+r,y+r);
    QPoint rightCenter(x+w-r,y+r);
    QPoint leftTop(x+r,y);
    QPoint rightBottom(x+w-r,y+h);
    QRect leftSemicircleRect(x,y,h,h);
    QRect rightSemicircleRect(x+w-h,y,h,h);

    QPainterPath semicircleEdgeRectanglePath;
    semicircleEdgeRectanglePath.moveTo(leftCenter);
    semicircleEdgeRectanglePath.arcTo(leftSemicircleRect,90,180);
    semicircleEdgeRectanglePath.lineTo(rightBottom);
    semicircleEdgeRectanglePath.arcTo(rightSemicircleRect,270,180);
    semicircleEdgeRectanglePath.lineTo(leftTop);
    semicircleEdgeRectanglePath.closeSubpath();

    return semicircleEdgeRectanglePath;
}

void CWidget::paintEvent(QPaintEvent *event)
{
    int x = 0, y = 0, w = 120, h = 30;
    QRect rect(x,y,w,h);
    painter.setPen(Qt::NoPen);
    painter.setBrush(QColor(qRgb(20, 28, 43)));
    QPainterPath linePath = this->makeSemicircleEdgeRectanglePath(rect);
    painter.drawPath(linePath);
    QPoint hLPoint(QPoint(rect.x() + rect.height()/2, rect.y()));
    QPoint hRPoint(QPoint(rect.x() + rect.width() + rect.y()/2 - rect.height()/2, rect.y()));
    QPoint uLPoint(rect.x() + rect.height()/2, rect.y() + rect.height()/2 + rect.height()/2);
    QPoint uRPoint(rect.x() + rect.width() - rect.height()/2, rect.y() + rect.height()/2 + rect.height()/2);

    QPen newPen;
    newPen.setColor(Qt::white);
    painter.setPen(newPen);
    painter.setBrush(QColor(qRgb(255, 255, 255)));
    painter.drawLine(hLPoint, hRPoint);
    painter.drawLine(uLPoint, uRPoint);

    QPen pen(Qt::white);
    painter.setPen(pen);
    QFont font;
    font.setFamily("Microsoft Yahei");
    font.setWeight(65);
    painter.setFont(font);
    QTextOption option;
    option.setAlignment(Qt::AlignCenter);
    painter.drawText(rect, "设置", option);
}