1 Qt加载SVG图片

QTreeWidgetItem *item = new QTreeWidgetItem;//svg_path为SVG图片路径QSvgRenderer *svg_render = new QSvgRenderer(svg_path);QPixmap *pixmap = new QPixmap(32, 32);pixmap->fill(Qt::transparent);QPainter painter(pixmap);svg_render->render(&painter);QIcon ico(*pixmap);item->setIcon(1, ico);

2 Qt改变SVG图片颜色

QTreeWidgetItem *item = new QTreeWidgetItem;QString path = svg_path;QFile file(path);file.open(QIODevice::ReadOnly);QByteArray data = file.readAll();QDomDocument doc;doc.setContent(data);file.close();QString color = "blue";SetSVGBackColor(doc.documentElement(), "path", "fill", color);QByteArray svg_content = doc.toByteArray();QSvgRenderer *svg_render = new QSvgRenderer(svg_content);QPixmap *pixmap = new QPixmap(32, 32);pixmap->fill(Qt::transparent);QPainter painter(pixmap);svg_render->render(&painter);QIcon ico(*pixmap);item->setIcon(0, ico);

void SetSVGBackColor(QDomElement &elem, QString strtagname, QString strattr, QString strattrval);void SetSVGBackColor(QDomElement &elem, QString strtagname, QString strattr, QString strattrval){    if (elem.tagName().compare(strtagname) == 0)    {        QString before_color = elem.attribute(strattr);        elem.setAttribute(strattr, strattrval);        QString color = elem.attribute(strattr);    }    for (int i = 0; i < elem.childNodes().count(); i++)    {        if (!elem.childNodes().at(i).isElement())        {            continue;        }        SetSVGBackColor(elem.childNodes().at(i).toElement(), strtagname, strattr, strattrval);    }}