Qt通用方法及类库4

函数名

    //九宫格图片 horzSplit-宫格1/3/7/9宽度  vertSplit-宫格1/3/7/9高度  dstWidth-目标图片宽度  dstHeight-目标图片高度
    static QPixmap ninePatch(const QString &picName, int horzSplit, int vertSplit, int dstWidth, int dstHeight);
    static QPixmap ninePatch(const QPixmap &pix, int horzSplit, int vertSplit, int dstWidth, int dstHeight);

函数体

QPixmap QUIHelper::ninePatch(const QString &picName, int horzSplit, int vertSplit, int dstWidth, int dstHeight)
{
    QPixmap pix(picName);
    return ninePatch(pix, horzSplit, vertSplit, dstWidth, dstHeight);
}

QPixmap QUIHelper::ninePatch(const QPixmap &pix, int horzSplit, int vertSplit, int dstWidth, int dstHeight)
{
    int pixWidth = pix.width();
    int pixHeight = pix.height();

    QPixmap pix1 = pix.copy(0, 0, horzSplit, vertSplit);
    QPixmap pix2 = pix.copy(horzSplit, 0, pixWidth - horzSplit * 2, vertSplit);
    QPixmap pix3 = pix.copy(pixWidth - horzSplit, 0, horzSplit, vertSplit);

    QPixmap pix4 = pix.copy(0, vertSplit, horzSplit, pixHeight - vertSplit * 2);
    QPixmap pix5 = pix.copy(horzSplit, vertSplit, pixWidth - horzSplit * 2, pixHeight - vertSplit * 2);
    QPixmap pix6 = pix.copy(pixWidth - horzSplit, vertSplit, horzSplit, pixHeight - vertSplit * 2);

    QPixmap pix7 = pix.copy(0, pixHeight - vertSplit, horzSplit, vertSplit);
    QPixmap pix8 = pix.copy(horzSplit, pixHeight - vertSplit, pixWidth - horzSplit * 2, pixWidth - horzSplit * 2);
    QPixmap pix9 = pix.copy(pixWidth - horzSplit, pixHeight - vertSplit, horzSplit, vertSplit);

    //保持高度拉宽
    pix2 = pix2.scaled(dstWidth - horzSplit * 2, vertSplit, Qt::IgnoreAspectRatio);
    //保持宽度拉高
    pix4 = pix4.scaled(horzSplit, dstHeight - vertSplit * 2, Qt::IgnoreAspectRatio);
    //宽高都缩放
    pix5 = pix5.scaled(dstWidth - horzSplit * 2, dstHeight - vertSplit * 2, Qt::IgnoreAspectRatio);
    //保持宽度拉高
    pix6 = pix6.scaled(horzSplit, dstHeight - vertSplit * 2, Qt::IgnoreAspectRatio);
    //保持高度拉宽
    pix8 = pix8.scaled(dstWidth - horzSplit * 2, vertSplit);

    //生成宽高图片并填充透明背景颜色
    QPixmap resultImg(dstWidth, dstHeight);
    resultImg.fill(Qt::transparent);

    QPainter painter;
    painter.begin(&resultImg);
    if (!resultImg.isNull()) {
        painter.drawPixmap(0, 0, pix1);
        painter.drawPixmap(horzSplit, 0, pix2);
        painter.drawPixmap(dstWidth - horzSplit, 0, pix3);

        painter.drawPixmap(0, vertSplit, pix4);
        painter.drawPixmap(horzSplit, vertSplit, pix5);
        painter.drawPixmap(dstWidth - horzSplit, vertSplit, pix6);

        painter.drawPixmap(0, dstHeight - vertSplit, pix7);
        painter.drawPixmap(horzSplit, dstHeight - vertSplit, pix8);
        painter.drawPixmap(dstWidth - horzSplit, dstHeight - vertSplit, pix9);
    }

    painter.end();
    return resultImg;
}