Qt--圆角控件，圆角窗体，鼠标拖动窗体

1.设置圆角控件：

connectPB->setStyleSheet ("border:2px groove gray;border-radius:10px;padding:2px 4px;");//设置圆角按键

2.设置圆角窗体：

setWindowFlags(Qt::FramelessWindowHint);

QBitmap bmp(this->size());

bmp.fill();

QPainter p(&bmp);

p.setPen(Qt::NoPen);

p.setBrush(Qt::black);

p.drawRoundedRect(bmp.rect(),10,10);

setMask(bmp);//设置窗体遮罩

3.鼠标拖动窗体功能

void loginwindow::mousePressEvent(QMouseEvent *mouseEvent)

{

if (mouseEvent->buttons() == Qt::LeftButton)

           pPos = mouseEvent->pos();

}

void loginwindow::mouseMoveEvent(QMouseEvent *mouseEvent)

{

if (mouseEvent->buttons() == Qt::LeftButton)

       move(mouseEvent->globalPos() - pPos);

}