Qt实现透明无边框，无关闭按钮，带自定义图片的窗体实例代码

1。实现无边框，无关闭按钮，透明窗体

setWindowFlags(Qt::Widget | Qt::WindowCloseButtonHint | Qt::FramelessWindowHint);
setAttribute(Qt::WA_TranslucentBackground, true);

当窗体是QWidget或继承QWidget就用Qt::Widget,当是QDialog类为窗体时换成Qt::Dialog

2。实现带图片的窗体

继承void paintEvent(QPaintEvent *)类，示例代码如下：

void CFeedbackPage::paintEvent( QPaintEvent * )
{
QPixmap *Bgpng = new QPixmap(":/Resources/main.png");
QPainter painter(this);
        painter.setOpacity(0.8);                                //设置图片窗体透明度
painter.setRenderHints(QPainter::SmoothPixmapTransform);
painter.drawPixmap(QRect(0,0,width(),this->height()), *Bgpng);
QPixmap *wizardpng = new QPixmap(":/Resources/wizard.png");
       painter.setOpacity(1.0);
painter.drawPixmap(QRect(25*g_nDesktopSize,40*g_nDesktopSize,(-50)*g_nDesktopSize,(this->height()-60)*g_nDesktopSize), *wizardpng);
}