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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QtCore>
#include <QtStateMachine>
#include <QtWidgets>
class Pixmap : public QObject, public QGraphicsPixmapItem
{
Q_OBJECT
Q_PROPERTY(QPointF pos READ pos WRITE setPos)
public:
Pixmap(const QPixmap &pix)
: QObject(), QGraphicsPixmapItem(pix)
{
setCacheMode(DeviceCoordinateCache);
}
};
class Button : public QGraphicsWidget
{
Q_OBJECT
public:
Button(const QPixmap &pixmap, QGraphicsItem *parent = nullptr)
: QGraphicsWidget(parent), _pix(pixmap)
{
setAcceptHoverEvents(true);
setCacheMode(DeviceCoordinateCache);
}
QRectF boundingRect() const override
{
return QRectF(-65, -65, 130, 130);
}
QPainterPath shape() const override
{
QPainterPath path;
path.addEllipse(boundingRect());
return path;
}
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *) override
{
bool down = option->state & QStyle::State_Sunken;
QRectF r = boundingRect();
QLinearGradient grad(r.topLeft(), r.bottomRight());
grad.setColorAt(down ? 1 : 0, option->state & QStyle::State_MouseOver ? Qt::white : Qt::lightGray);
grad.setColorAt(down ? 0 : 1, Qt::darkGray);
painter->setPen(Qt::darkGray);
painter->setBrush(grad);
painter->drawEllipse(r);
QLinearGradient grad2(r.topLeft(), r.bottomRight());
grad.setColorAt(down ? 1 : 0, Qt::darkGray);
grad.setColorAt(down ? 0 : 1, Qt::lightGray);
painter->setPen(Qt::NoPen);
painter->setBrush(grad);
if (down)
painter->translate(2, 2);
painter->drawEllipse(r.adjusted(5, 5, -5, -5));
painter->drawPixmap(-_pix.width()/2, -_pix.height()/2, _pix);
}
signals:
void pressed();
protected:
void mousePressEvent(QGraphicsSceneMouseEvent *) override
{
emit pressed();
update();
}
void mouseReleaseEvent(QGraphicsSceneMouseEvent *) override
{
update();
}
private:
QPixmap _pix;
};
class View : public QGraphicsView
{
public:
View(QGraphicsScene *scene) : QGraphicsView(scene) { }
protected:
void resizeEvent(QResizeEvent *event) override
{
QGraphicsView::resizeEvent(event);
fitInView(sceneRect(), Qt::KeepAspectRatio);
}
};
int main(int argc, char **argv)
{
Q_INIT_RESOURCE(animatedtiles);
QApplication app(argc, argv);
QPixmap kineticPix(":/images/kinetic.png");
QPixmap bgPix(":/images/Time-For-Lunch-2.jpg");
//! [0]
QGraphicsScene scene(-350, -350, 700, 700);
QList<Pixmap *> items;
for (int i = 0; i < 64; ++i) {
Pixmap *item = new Pixmap(kineticPix);
item->setOffset(-kineticPix.width()/2, -kineticPix.height()/2);
item->setZValue(i);
items << item;
scene.addItem(item);
}
//! [0]
//! [1]
// Buttons
QGraphicsItem *buttonParent = new QGraphicsRectItem;
Button *ellipseButton = new Button(QPixmap(":/images/ellipse.png"), buttonParent);
Button *figure8Button = new Button(QPixmap(":/images/figure8.png"), buttonParent);
Button *randomButton = new Button(QPixmap(":/images/random.png"), buttonParent);
Button *tiledButton = new Button(QPixmap(":/images/tile.png"), buttonParent);
Button *centeredButton = new Button(QPixmap(":/images/centered.png"), buttonParent);
ellipseButton->setPos(-100, -100);
figure8Button->setPos(100, -100);
randomButton->setPos(0, 0);
tiledButton->setPos(-100, 100);
centeredButton->setPos(100, 100);
scene.addItem(buttonParent);
buttonParent->setTransform(QTransform::fromScale(0.75, 0.75), true);
buttonParent->setPos(200, 200);
buttonParent->setZValue(65);
//! [1]
//! [2]
// States
QState *rootState = new QState;
QState *ellipseState = new QState(rootState);
QState *figure8State = new QState(rootState);
QState *randomState = new QState(rootState);
QState *tiledState = new QState(rootState);
QState *centeredState = new QState(rootState);
//! [2]
//! [3]
// Values
for (int i = 0; i < items.count(); ++i) {
Pixmap *item = items.at(i);
// Ellipse
ellipseState->assignProperty(item, "pos",
QPointF(qCos((i / 63.0) * 6.28) * 250,
qSin((i / 63.0) * 6.28) * 250));
// Figure 8
figure8State->assignProperty(item, "pos",
QPointF(qSin((i / 63.0) * 6.28) * 250,
qSin(((i * 2)/63.0) * 6.28) * 250));
// Random
randomState->assignProperty(item, "pos",
QPointF(-250 + QRandomGenerator::global()->bounded(500),
-250 + QRandomGenerator::global()->bounded(500)));
// Tiled
tiledState->assignProperty(item, "pos",
QPointF(((i % 8) - 4) * kineticPix.width() + kineticPix.width() / 2,
((i / 8) - 4) * kineticPix.height() + kineticPix.height() / 2));
// Centered
centeredState->assignProperty(item, "pos", QPointF());
}
//! [3]
//! [4]
// Ui
View *view = new View(&scene);
view->setWindowTitle(QT_TRANSLATE_NOOP(QGraphicsView, "Animated Tiles"));
view->setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
view->setBackgroundBrush(bgPix);
view->setCacheMode(QGraphicsView::CacheBackground);
view->setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
view->show();
//! [4]
//! [5]
QStateMachine states;
states.addState(rootState);
states.setInitialState(rootState);
rootState->setInitialState(centeredState);
//! [5]
//! [6]
QParallelAnimationGroup *group = new QParallelAnimationGroup;
for (int i = 0; i < items.count(); ++i) {
QPropertyAnimation *anim = new QPropertyAnimation(items[i], "pos");
anim->setDuration(750 + i * 25);
anim->setEasingCurve(QEasingCurve::InOutBack);
group->addAnimation(anim);
}
//! [6]
//! [7]
QAbstractTransition *trans = rootState->addTransition(ellipseButton, &Button::pressed, ellipseState);
trans->addAnimation(group);
trans = rootState->addTransition(figure8Button, &Button::pressed, figure8State);
trans->addAnimation(group);
trans = rootState->addTransition(randomButton, &Button::pressed, randomState);
trans->addAnimation(group);
trans = rootState->addTransition(tiledButton, &Button::pressed, tiledState);
trans->addAnimation(group);
trans = rootState->addTransition(centeredButton, &Button::pressed, centeredState);
trans->addAnimation(group);
//! [7]
//! [8]
QTimer timer;
timer.start(125);
timer.setSingleShot(true);
trans = rootState->addTransition(&timer, &QTimer::timeout, ellipseState);
trans->addAnimation(group);
states.start();
//! [8]
#ifdef QT_KEYPAD_NAVIGATION
QApplication::setNavigationMode(Qt::NavigationModeCursorAuto);
#endif
return app.exec();
}
#include "main.moc"
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