QImage ImageView::renderSvg(const QSize &imageSize) const
{
QImage image(imageSize, QImage::Format_ARGB32);
image.fill(Qt::transparent);
QPainter painter;
painter.begin(&image);
#ifndef QT_NO_SVG
QGraphicsSvgItem *svgItem = qgraphicsitem_cast<QGraphicsSvgItem *>(m_imageItem);
QTC_ASSERT(svgItem, return image);
svgItem->renderer()->render(&painter, QRectF(QPointF(), QSizeF(imageSize)));
#endif
painter.end();
return image;
}
MainWindow::MainWindow(QWidget *parent)
: QWidget(parent)
{
// create a scene with items,
// use the view to show the scene
QGraphicsScene *scene = new QGraphicsScene();
QGraphicsView *gv = new QGraphicsView(this);
gv->setScene(scene);
if (gv->scene())
{
printf("renc: scene is not null.\n");
// these two lines are at scene origin pos.
scene->addLine(0, 0, 100, 0, QPen(Qt::red));
scene->addLine(0, 0, 0, 100, QPen(Qt::green));
/*QGraphicsRectItem *rect = */
scene->addRect(QRectF(0,0,50,50), QPen(Qt::red), QBrush(Qt::green));
// svg image
QGraphicsSvgItem *svgItem = new QGraphicsSvgItem(svgFile2);
scene->addItem((svgItem));
svgItem->setPos(400, 0);
bool rValid1 = svgItem->renderer()->isValid();
printf("--%d--\n", rValid1);
// QWidget to scene
QPushButton *btn = new QPushButton("button 1");// at (0,0) by default.
QGraphicsProxyWidget *btnWidget = scene->addWidget(btn);
btnWidget->setPos(0, 400);
//
{
SvgPushButton *btn2 = new SvgPushButton(svgFile1);
QGraphicsProxyWidget *btnWidget2 = scene->addWidget(btn2);
btnWidget2->setPos(400, 400);
}
}
else
printf("renc: scene is null.\n");
//setCentralWidget(gv); setWindowTitle("Demo: graphics view");//QMainWindow
setStyleSheet("background-color: rgb(100,120,50);");
}
void SymbolDataEditor::load(const QString & fileName)
{
loadSettings();
doc = QDomDocument("SVG");
QFile file(fileName);
if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
return;
if (!doc.setContent(&file))
{
file.close();
return;
}
file.close();
//scale viewbox because it is necessary in SvgView::insertSymbol()
QDomElement svgElement = doc.elementsByTagName("svg").item(0).toElement();
SvgView::scaleViewBox(svgElement);
QByteArray scaledFile = doc.toString(0).replace(">\n<tspan", "><tspan").toUtf8();
QGraphicsSvgItem *symbolItem = new QGraphicsSvgItem();
symbolItem->setSharedRenderer(new QSvgRenderer(scaledFile));
QSizeF itemSize = symbolItem->renderer()->defaultSize();
clear();
//add changed item to the scene
scene->setSceneRect(0, 0, itemSize.width() * sceneScale, itemSize.height() * sceneScale);
symbolItem->setPos(scene->width() / 2 - itemSize.width() / 2.0,
scene->height() / 2 - itemSize.height() / 2.0);
scene->addItem(symbolItem);
//autoscale graphicsview depending on items and views size
limitScale(qMax(qreal(width()) / itemSize.width(),
qreal(height()) / itemSize.height()) / currentScaleFactor);
centerOn(symbolItem);
setDragMode(QGraphicsView::ScrollHandDrag);
}