SVGファイルのレンダリング

#include <QApplication>
#include <QSvgWidget>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QSvgWidget svgWidget(QStringLiteral(":/images/example.svg"));
    svgWidget.setGeometry(100, 100, 400, 400);
    svgWidget.show();
    return app.exec();
}

#include <QApplication>
#include <QSvgWidget>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QSvgWidget *svgWidget = new QSvgWidget;
    svgWidget->load(QStringLiteral(":/images/example.svg"));
    svgWidget->show();
    return app.exec();
}

#include <QApplication>
#include <QSvgRenderer>
#include <QImage>
#include <QPainter>
#include <QLabel>
#include <QPixmap>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QSvgRenderer renderer(QStringLiteral(":/images/example.svg"));
    if (renderer.isValid()) {
        QImage image(400, 400, QImage::Format_ARGB32_Premultiplied);
        image.fill(Qt::transparent);
        QPainter painter(&image);
        renderer.render(&painter);

        QLabel label;
        label.setPixmap(QPixmap::fromImage(image));
        label.resize(400, 400);
        label.show();
        return app.exec();
    }
    return 1;
}

// In your widget's header file:
#include <QSvgRenderer>

class MyWidget : public QWidget
{
    Q_OBJECT
public:
    MyWidget(QWidget *parent = nullptr)
        : QWidget(parent), renderer(QStringLiteral(":/images/example.svg")) {}

protected:
    void paintEvent(QPaintEvent *) override {
        QPainter painter(this);
        renderer.render(&painter);
    }

private:
    QSvgRenderer renderer;
};