States Example▲
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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"