Qt画饼图

PaintArea::PaintArea()

{

    scale=1;//初始化scale

    image=QImage(800,600,QImage::Format_RGB32);

    backColor=qRgb(255,255,255);//设置背景色为白色

    image.fill(backColor);

    paint(image);

}

void PaintArea::paintEvent(QPaintEvent *)

{

    QPainter paint(this);

    paint.scale(scale,scale);

    paint.drawImage(0,0,image);

}

void PaintArea::paint(QImage &image)

{

    QPainter painter(&image);

   // painter.drawLine(0,0,400,400);

    painter.setBrush(Qt::red);

    painter.setPen(Qt::NoPen);

   // painter.drawPie(0,0,30,30,0,90*16);

    painter.drawPie(50,50,100,100,0,90*16*6/10);//6为男，10为总个数

    painter.setBrush(Qt::blue);

    painter.drawPie(50,50,100,100,90*16*6/10,360*16-90*16*6/10);

    painter.setPen(Qt::blue);

    painter.drawText(10,10,tr("男"));

    painter.setPen(Qt::red);

    painter.drawText(10,20,tr("女"));

}