myButton::paintEvent

void myButton::paintEvent(QPaintEvent *e)
{
    QToolButton::paintEvent(e);
    QPainter painter(this);
    QPen pen;


    pen.setColor(mRectColor); //
    painter.setPen(pen);  //选择画笔
    QRect rect(this->geometry().topRight(),mSize);
    painter.drawRect(rect);
    painter.fillRect(rect,mRectColor);
    pen.setColor(mNameColor);
    painter.setPen(pen);
    painter.drawText(rect,Qt::AlignCenter,mRectText);


    QRect rectImage(this->geometry().topLeft(),QSize(this->geometry().width(),this->geometry().height()/10*9));
    painter.drawImage(rectImage,QImage(mImage));


    QRect RectText(rectImage.bottomLeft(),QSize(this->geometry().width(),this->geometry().height()-rectImage.height()));
    painter.drawRect(RectText);
    pen.setColor(mNameColor);
    painter.setPen(pen);
    painter.fillRect(RectText,mRectColor);
    painter.drawText(RectText,Qt::AlignCenter,mProductNameText);


    painter.end(); //结束绘制。绘制时使用的任何资源都被释放。虽然有时不需要调用end()，析构函数将会执行它