Qt5 QPainter 如何做出仅边框效果-爱代码爱编程

void paintEvent(QPaintEvent *event)
{
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing);  // 设置反锯齿;
	// 通过MouseEnterEvent() & MouseLeaveEvent()函数检查是否鼠标在此Widget上
    if (!isHovered)
    {
		// 如鼠标进去此Widget时，边框改变颜色
        const QColor color(50, 50, 63);
        painter.setPen(color);
    }
    else
    {
		// 如鼠标离开此Widget时，边框改变颜色
        const QColor color(86, 85, 96);
        painter.setPen(color);
    }
    painter.setBrush(QBrush(Qt::transparent));  // 设置填充颜色为透明

    QRect rect = this->rect();
    rect.setWidth(rect.width() - 1);
    rect.setHeight(rect.height() - 1);
    painter.drawRoundedRect(rect, 8, 8);  // 绘制带圆角的矩形
    QWidget::paintEvent(event);
}

参考：(https://blog.csdn.net/GoForwardToStep/article/details/52084538)