public void first() {
// ! [0]
QGraphicsScene scene = new QGraphicsScene();
scene.addText("Hello, world!");
QGraphicsView view = new QGraphicsView(scene);
view.show();
// ! [0]
}
public void fourth() {
// ! [4]
QGraphicsScene scene = new QGraphicsScene();
QGraphicsView view = new QGraphicsView(scene);
view.show();
// a white semi-transparent foreground
scene.setForegroundBrush(new QBrush(new QColor(255, 255, 255, 127)));
// a grid foreground
scene.setForegroundBrush(new QBrush(QColor.lightGray, Qt.BrushStyle.CrossPattern));
// ! [4]
}
public void third() {
// ! [3]
QGraphicsScene scene = new QGraphicsScene();
QGraphicsView view = new QGraphicsView(scene);
view.show();
// a blue background
scene.setBackgroundBrush(new QBrush(QColor.blue));
// a gradient background
QRadialGradient gradient = new QRadialGradient(0, 0, 10);
gradient.setSpread(QGradient.Spread.RepeatSpread);
scene.setBackgroundBrush(new QBrush(gradient));
// ! [3]
}
public void second() {
// ! [1]
QGraphicsScene scene = new QGraphicsScene();
scene.addRect(0d, 0d, 50d, 50d);
QPrinter printer = new QPrinter(QPrinter.PrinterMode.HighResolution);
printer.setPageSize(QPrinter.PageSize.A4);
QPainter painter = new QPainter(printer);
scene.render(painter);
// ! [1]
int depth = 0;
// ! [2]
QSizeF segmentSize = sceneRect().size().divide(java.lang.Math.pow(2, depth - 1));
// ! [2]
}
public OpenGLInGraphicsView(boolean gl) {
QGLFormat format = new QGLFormat();
format.setSampleBuffers(true);
if (gl) {
setViewport(new QGLWidget(format));
setWindowTitle("GL window");
} else {
setWindowTitle("Non GL Window");
}
QGraphicsScene scene = new QGraphicsScene();
QGraphicsPixmapItem pixmapItem =
new QGraphicsPixmapItem(new QPixmap("classpath:org/qtjambi/images/chip-demo.png")) {
@Override
public void paint(QPainter painter, QStyleOptionGraphicsItem option, QWidget widget) {
// painter.setRenderHint(QPainter.RenderHint.SmoothPixmapTransform, true);
// super.paint(painter, option, widget);
painter.drawPixmap(boundingRect().toRect(), this.pixmap());
}
};
pixmapItem.setFlag(QGraphicsItem.GraphicsItemFlag.ItemIsMovable, true);
pixmapItem.setTransformationMode(Qt.TransformationMode.SmoothTransformation);
scene.addItem(pixmapItem);
QGraphicsPixmapItem otherPixmapItem =
scene.addPixmap(new QPixmap("classpath:org/qtjambi/images/chip-demo.png"));
otherPixmapItem.setFlag(QGraphicsItem.GraphicsItemFlag.ItemIsMovable, true);
otherPixmapItem.setTransformationMode(Qt.TransformationMode.SmoothTransformation);
scene.addText("Hello World").setFlag(QGraphicsItem.GraphicsItemFlag.ItemIsMovable, true);
setScene(scene);
rotate(45);
setRenderHint(QPainter.RenderHint.SmoothPixmapTransform);
// setRenderHint(QPainter.RenderHint.Antialiasing, true);
// setRenderHint(QPainter.RenderHint.HighQualityAntialiasing, true);
// setRenderHint(QPainter.RenderHint.TextAntialiasing, true);
}