main.cpp Example File | Qt Widgets 5.12.9

- Qt 5.12
- Qt Widgets
- States Example
- main.cpp Example File
- Qt 5.12.9 Reference Documentation

# main.cpp Example File

animation/states/main.cpp

     /****************************************************************************
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     ** Contact: https://www.qt.io/licensing/
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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 *) override
         {
             painter->drawPixmap(QPointF(), p);
         }

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

     private:
         QPixmap p;
     };

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

         void resizeEvent(QResizeEvent *) override
         {
             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"