Qt加载SVG图片以及改变SVG图片颜色

1 Qt加载SVG图片

1QTreeWidgetItem *item = new QTreeWidgetItem;
2//svg_path为SVG图片路径
3QSvgRenderer *svg_render = new QSvgRenderer(svg_path);
4QPixmap *pixmap = new QPixmap(32, 32);
5pixmap->fill(Qt::transparent);
6QPainter painter(pixmap);
7svg_render->render(&painter);
8QIcon ico(*pixmap);
9item->setIcon(1, ico);

2 Qt改变SVG图片颜色

1QTreeWidgetItem *item = new QTreeWidgetItem;
2QString path = svg_path;
3QFile file(path);
4file.open(QIODevice::ReadOnly);
5QByteArray data = file.readAll();
6QDomDocument doc;
7doc.setContent(data);
8file.close();
9
10QString color = "blue";
11
12SetSVGBackColor(doc.documentElement(), "path", "fill", color);
13
14QByteArray svg_content = doc.toByteArray();
15QSvgRenderer *svg_render = new QSvgRenderer(svg_content);
16QPixmap *pixmap = new QPixmap(32, 32);
17pixmap->fill(Qt::transparent);
18QPainter painter(pixmap);
19svg_render->render(&painter);
20QIcon ico(*pixmap);
21item->setIcon(0, ico);
22
23void SetSVGBackColor(QDomElement &elem, QString strtagname, QString strattr, QString strattrval);
24
25void SetSVGBackColor(QDomElement &elem, QString strtagname, QString strattr, QString strattrval)
26{
27    if (elem.tagName().compare(strtagname) == 0)
28    {
29        QString before_color = elem.attribute(strattr);
30        elem.setAttribute(strattr, strattrval);
31        QString color = elem.attribute(strattr);
32    }
33    for (int i = 0; i < elem.childNodes().count(); i++)
34    {
35        if (!elem.childNodes().at(i).isElement())
36        {
37            continue;
38        }
39        SetSVGBackColor(elem.childNodes().at(i).toElement(), strtagname, strattr, strattrval);
40    }
41}