main.cpp Example File

 /****************************************************************************
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 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/
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 ** This file is part of the QtCore module of the Qt Toolkit.
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 #include <QtWidgets>

 class Pixmap : public QGraphicsObject
 {
     Q_OBJECT
 public:
     Pixmap(const QPixmap &pix) : QGraphicsObject(), p(pix)
     {
     }

     void paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
     {
         painter->drawPixmap(QPointF(), p);
     }

     QRectF boundingRect() const
     {
         return QRectF( QPointF(0, 0), p.size());
     }

 private:
     QPixmap p;
 };

 class GraphicsView : public QGraphicsView
 {
 public:
     GraphicsView(QGraphicsScene *scene) : QGraphicsView(scene)
     {
     }

     virtual void resizeEvent(QResizeEvent *)
     {
         fitInView(sceneRect(), Qt::KeepAspectRatio);
     }
 };

 int main(int argc, char *argv[])
 {
     Q_INIT_RESOURCE(states);

     QApplication app(argc, argv);

     // Text edit and button
     QTextEdit *edit = new QTextEdit;
     edit->setText("asdf lkjha yuoiqwe asd iuaysd u iasyd uiy "
                   "asdf lkjha yuoiqwe asd iuaysd u iasyd uiy "
                   "asdf lkjha yuoiqwe asd iuaysd u iasyd uiy "
                   "asdf lkjha yuoiqwe asd iuaysd u iasyd uiy!");

     QPushButton *button = new QPushButton;
     QGraphicsProxyWidget *buttonProxy = new QGraphicsProxyWidget;
     buttonProxy->setWidget(button);
     QGraphicsProxyWidget *editProxy = new QGraphicsProxyWidget;
     editProxy->setWidget(edit);

     QGroupBox *box = new QGroupBox;
     box->setFlat(true);
     box->setTitle("Options");

     QVBoxLayout *layout2 = new QVBoxLayout;
     box->setLayout(layout2);
     layout2->addWidget(new QRadioButton("Herring"));
     layout2->addWidget(new QRadioButton("Blue Parrot"));
     layout2->addWidget(new QRadioButton("Petunias"));
     layout2->addStretch();

     QGraphicsProxyWidget *boxProxy = new QGraphicsProxyWidget;
     boxProxy->setWidget(box);

     // Parent widget
     QGraphicsWidget *widget = new QGraphicsWidget;
     QGraphicsLinearLayout *layout = new QGraphicsLinearLayout(Qt::Vertical, widget);
     layout->addItem(editProxy);
     layout->addItem(buttonProxy);
     widget->setLayout(layout);

     Pixmap *p1 = new Pixmap(QPixmap(":/digikam.png"));
     Pixmap *p2 = new Pixmap(QPixmap(":/akregator.png"));
     Pixmap *p3 = new Pixmap(QPixmap(":/accessories-dictionary.png"));
     Pixmap *p4 = new Pixmap(QPixmap(":/k3b.png"));
     Pixmap *p5 = new Pixmap(QPixmap(":/help-browser.png"));
     Pixmap *p6 = new Pixmap(QPixmap(":/kchart.png"));

     QGraphicsScene scene(0, 0, 400, 300);
     scene.setBackgroundBrush(scene.palette().window());
     scene.addItem(widget);
     scene.addItem(boxProxy);
     scene.addItem(p1);
     scene.addItem(p2);
     scene.addItem(p3);
     scene.addItem(p4);
     scene.addItem(p5);
     scene.addItem(p6);

     QStateMachine machine;
     QState *state1 = new QState(&machine);
     QState *state2 = new QState(&machine);
     QState *state3 = new QState(&machine);
     machine.setInitialState(state1);

     // State 1
     state1->assignProperty(button, "text", "Switch to state 2");
     state1->assignProperty(widget, "geometry", QRectF(0, 0, 400, 150));
     state1->assignProperty(box, "geometry", QRect(-200, 150, 200, 150));
     state1->assignProperty(p1, "pos", QPointF(68, 200)); // 185));
     state1->assignProperty(p2, "pos", QPointF(168, 200)); // 185));
     state1->assignProperty(p3, "pos", QPointF(268, 200)); // 185));
     state1->assignProperty(p4, "pos", QPointF(68 - 150, 48 - 150));
     state1->assignProperty(p5, "pos", QPointF(168, 48 - 150));
     state1->assignProperty(p6, "pos", QPointF(268 + 150, 48 - 150));
     state1->assignProperty(p1, "rotation", qreal(0));
     state1->assignProperty(p2, "rotation", qreal(0));
     state1->assignProperty(p3, "rotation", qreal(0));
     state1->assignProperty(p4, "rotation", qreal(-270));
     state1->assignProperty(p5, "rotation", qreal(-90));
     state1->assignProperty(p6, "rotation", qreal(270));
     state1->assignProperty(boxProxy, "opacity", qreal(0));
     state1->assignProperty(p1, "opacity", qreal(1));
     state1->assignProperty(p2, "opacity", qreal(1));
     state1->assignProperty(p3, "opacity", qreal(1));
     state1->assignProperty(p4, "opacity", qreal(0));
     state1->assignProperty(p5, "opacity", qreal(0));
     state1->assignProperty(p6, "opacity", qreal(0));

     // State 2
     state2->assignProperty(button, "text", "Switch to state 3");
     state2->assignProperty(widget, "geometry", QRectF(200, 150, 200, 150));
     state2->assignProperty(box, "geometry", QRect(9, 150, 190, 150));
     state2->assignProperty(p1, "pos", QPointF(68 - 150, 185 + 150));
     state2->assignProperty(p2, "pos", QPointF(168, 185 + 150));
     state2->assignProperty(p3, "pos", QPointF(268 + 150, 185 + 150));
     state2->assignProperty(p4, "pos", QPointF(64, 48));
     state2->assignProperty(p5, "pos", QPointF(168, 48));
     state2->assignProperty(p6, "pos", QPointF(268, 48));
     state2->assignProperty(p1, "rotation", qreal(-270));
     state2->assignProperty(p2, "rotation", qreal(90));
     state2->assignProperty(p3, "rotation", qreal(270));
     state2->assignProperty(p4, "rotation", qreal(0));
     state2->assignProperty(p5, "rotation", qreal(0));
     state2->assignProperty(p6, "rotation", qreal(0));
     state2->assignProperty(boxProxy, "opacity", qreal(1));
     state2->assignProperty(p1, "opacity", qreal(0));
     state2->assignProperty(p2, "opacity", qreal(0));
     state2->assignProperty(p3, "opacity", qreal(0));
     state2->assignProperty(p4, "opacity", qreal(1));
     state2->assignProperty(p5, "opacity", qreal(1));
     state2->assignProperty(p6, "opacity", qreal(1));

     // State 3
     state3->assignProperty(button, "text", "Switch to state 1");
     state3->assignProperty(p1, "pos", QPointF(0, 5));
     state3->assignProperty(p2, "pos", QPointF(0, 5 + 64 + 5));
     state3->assignProperty(p3, "pos", QPointF(5, 5 + (64 + 5) + 64));
     state3->assignProperty(p4, "pos", QPointF(5 + 64 + 5, 5));
     state3->assignProperty(p5, "pos", QPointF(5 + 64 + 5, 5 + 64 + 5));
     state3->assignProperty(p6, "pos", QPointF(5 + 64 + 5, 5 + (64 + 5) + 64));
     state3->assignProperty(widget, "geometry", QRectF(138, 5, 400 - 138, 200));
     state3->assignProperty(box, "geometry", QRect(5, 205, 400, 90));
     state3->assignProperty(p1, "opacity", qreal(1));
     state3->assignProperty(p2, "opacity", qreal(1));
     state3->assignProperty(p3, "opacity", qreal(1));
     state3->assignProperty(p4, "opacity", qreal(1));
     state3->assignProperty(p5, "opacity", qreal(1));
     state3->assignProperty(p6, "opacity", qreal(1));

     QAbstractTransition *t1 = state1->addTransition(button, SIGNAL(clicked()), state2);
     QSequentialAnimationGroup *animation1SubGroup = new QSequentialAnimationGroup;
     animation1SubGroup->addPause(250);
     animation1SubGroup->addAnimation(new QPropertyAnimation(box, "geometry"));
     t1->addAnimation(animation1SubGroup);
     t1->addAnimation(new QPropertyAnimation(widget, "geometry"));
     t1->addAnimation(new QPropertyAnimation(p1, "pos"));
     t1->addAnimation(new QPropertyAnimation(p2, "pos"));
     t1->addAnimation(new QPropertyAnimation(p3, "pos"));
     t1->addAnimation(new QPropertyAnimation(p4, "pos"));
     t1->addAnimation(new QPropertyAnimation(p5, "pos"));
     t1->addAnimation(new QPropertyAnimation(p6, "pos"));
     t1->addAnimation(new QPropertyAnimation(p1, "rotation"));
     t1->addAnimation(new QPropertyAnimation(p2, "rotation"));
     t1->addAnimation(new QPropertyAnimation(p3, "rotation"));
     t1->addAnimation(new QPropertyAnimation(p4, "rotation"));
     t1->addAnimation(new QPropertyAnimation(p5, "rotation"));
     t1->addAnimation(new QPropertyAnimation(p6, "rotation"));
     t1->addAnimation(new QPropertyAnimation(p1, "opacity"));
     t1->addAnimation(new QPropertyAnimation(p2, "opacity"));
     t1->addAnimation(new QPropertyAnimation(p3, "opacity"));
     t1->addAnimation(new QPropertyAnimation(p4, "opacity"));
     t1->addAnimation(new QPropertyAnimation(p5, "opacity"));
     t1->addAnimation(new QPropertyAnimation(p6, "opacity"));

     QAbstractTransition *t2 = state2->addTransition(button, SIGNAL(clicked()), state3);
     t2->addAnimation(new QPropertyAnimation(box, "geometry"));
     t2->addAnimation(new QPropertyAnimation(widget, "geometry"));
     t2->addAnimation(new QPropertyAnimation(p1, "pos"));
     t2->addAnimation(new QPropertyAnimation(p2, "pos"));
     t2->addAnimation(new QPropertyAnimation(p3, "pos"));
     t2->addAnimation(new QPropertyAnimation(p4, "pos"));
     t2->addAnimation(new QPropertyAnimation(p5, "pos"));
     t2->addAnimation(new QPropertyAnimation(p6, "pos"));
     t2->addAnimation(new QPropertyAnimation(p1, "rotation"));
     t2->addAnimation(new QPropertyAnimation(p2, "rotation"));
     t2->addAnimation(new QPropertyAnimation(p3, "rotation"));
     t2->addAnimation(new QPropertyAnimation(p4, "rotation"));
     t2->addAnimation(new QPropertyAnimation(p5, "rotation"));
     t2->addAnimation(new QPropertyAnimation(p6, "rotation"));
     t2->addAnimation(new QPropertyAnimation(p1, "opacity"));
     t2->addAnimation(new QPropertyAnimation(p2, "opacity"));
     t2->addAnimation(new QPropertyAnimation(p3, "opacity"));
     t2->addAnimation(new QPropertyAnimation(p4, "opacity"));
     t2->addAnimation(new QPropertyAnimation(p5, "opacity"));
     t2->addAnimation(new QPropertyAnimation(p6, "opacity"));

     QAbstractTransition *t3 = state3->addTransition(button, SIGNAL(clicked()), state1);
     t3->addAnimation(new QPropertyAnimation(box, "geometry"));
     t3->addAnimation(new QPropertyAnimation(widget, "geometry"));
     t3->addAnimation(new QPropertyAnimation(p1, "pos"));
     t3->addAnimation(new QPropertyAnimation(p2, "pos"));
     t3->addAnimation(new QPropertyAnimation(p3, "pos"));
     t3->addAnimation(new QPropertyAnimation(p4, "pos"));
     t3->addAnimation(new QPropertyAnimation(p5, "pos"));
     t3->addAnimation(new QPropertyAnimation(p6, "pos"));
     t3->addAnimation(new QPropertyAnimation(p1, "rotation"));
     t3->addAnimation(new QPropertyAnimation(p2, "rotation"));
     t3->addAnimation(new QPropertyAnimation(p3, "rotation"));
     t3->addAnimation(new QPropertyAnimation(p4, "rotation"));
     t3->addAnimation(new QPropertyAnimation(p5, "rotation"));
     t3->addAnimation(new QPropertyAnimation(p6, "rotation"));
     t3->addAnimation(new QPropertyAnimation(p1, "opacity"));
     t3->addAnimation(new QPropertyAnimation(p2, "opacity"));
     t3->addAnimation(new QPropertyAnimation(p3, "opacity"));
     t3->addAnimation(new QPropertyAnimation(p4, "opacity"));
     t3->addAnimation(new QPropertyAnimation(p5, "opacity"));
     t3->addAnimation(new QPropertyAnimation(p6, "opacity"));

     machine.start();

     GraphicsView view(&scene);

     view.show();

     return app.exec();
 }

 #include "main.moc"