Qt动态生成图片

    


    QImage image(QSize((m+1) *100, (n+1) *100), QImage::Format_ARGB32);
    image.fill("white");
    QPainter *painter = new QPainter(&image);
    painter->save();
    QPen pen;
    pen.setWidth(2);
    pen.setColor(Qt::red);
    painter->setPen(pen);
    QString row_prefix = "P";
    QString col_prefix = "T";
    for (int i = 0; i < m; i++) {
        if(p_t)
            col_prefix = "P";
        painter->drawText(QPoint(100 + i * 80, 20), col_prefix + QString::number(i));
    }
    for (int i = 0; i < n; i++) {
        if(p_t)
            row_prefix = "T";
        painter->drawText(QPoint(20, 100 + i * 80), row_prefix + QString::number(i));
    }
    for (int i = 0; i < m; i++) {
        for (int j = 0; j < n; j++) {
            painter->drawText(QPoint(100 + 80 * i, 100 + 80 * j), QString::number(matrix[i][j]));
        }
    }
    painter->restore();
    painter->end();
    QImage saveImg = image.copy();
    saveImg.save(pic_name);