qt5base-lts/examples/widgets/animation/moveblocks/main.cpp
hjk 40a54bf565 Examples: Replace 'Q_DECL_OVERRIDE' by 'override'
Examples should demonstrate best practice, and we can use the keyword
directly nowadays.

Change-Id: I1f122e5caceca17290757ffbaf3d660e7daa9ae4
Reviewed-by: Topi Reiniö <topi.reinio@theqtcompany.com>
2016-06-15 09:32:30 +00:00

332 lines
10 KiB
C++

/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
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****************************************************************************/
#include <QtCore>
#include <QtWidgets>
//![15]
class StateSwitchEvent: public QEvent
{
public:
StateSwitchEvent()
: QEvent(Type(StateSwitchType))
{
}
explicit StateSwitchEvent(int rand)
: QEvent(Type(StateSwitchType)),
m_rand(rand)
{
}
enum { StateSwitchType = QEvent::User + 256 };
int rand() const { return m_rand; }
private:
int m_rand;
};
//![15]
//![16]
class QGraphicsRectWidget : public QGraphicsWidget
{
public:
void paint(QPainter *painter, const QStyleOptionGraphicsItem *,
QWidget *) override
{
painter->fillRect(rect(), Qt::blue);
}
};
//![16]
class StateSwitchTransition: public QAbstractTransition
{
public:
StateSwitchTransition(int rand)
: QAbstractTransition(),
m_rand(rand)
{
}
protected:
//![14]
virtual bool eventTest(QEvent *event) override
{
return (event->type() == QEvent::Type(StateSwitchEvent::StateSwitchType))
&& (static_cast<StateSwitchEvent *>(event)->rand() == m_rand);
}
//![14]
virtual void onTransition(QEvent *) override {}
private:
int m_rand;
};
//![10]
class StateSwitcher : public QState
{
Q_OBJECT
public:
StateSwitcher(QStateMachine *machine)
: QState(machine), m_stateCount(0), m_lastIndex(0)
{ }
//![10]
//![11]
virtual void onEntry(QEvent *) override
{
int n;
while ((n = (qrand() % m_stateCount + 1)) == m_lastIndex)
{ }
m_lastIndex = n;
machine()->postEvent(new StateSwitchEvent(n));
}
virtual void onExit(QEvent *) override {}
//![11]
//![12]
void addState(QState *state, QAbstractAnimation *animation) {
StateSwitchTransition *trans = new StateSwitchTransition(++m_stateCount);
trans->setTargetState(state);
addTransition(trans);
trans->addAnimation(animation);
}
//![12]
private:
int m_stateCount;
int m_lastIndex;
};
//![13]
QState *createGeometryState(QObject *w1, const QRect &rect1,
QObject *w2, const QRect &rect2,
QObject *w3, const QRect &rect3,
QObject *w4, const QRect &rect4,
QState *parent)
{
QState *result = new QState(parent);
result->assignProperty(w1, "geometry", rect1);
result->assignProperty(w2, "geometry", rect2);
result->assignProperty(w3, "geometry", rect3);
result->assignProperty(w4, "geometry", rect4);
return result;
}
//![13]
class GraphicsView : public QGraphicsView
{
Q_OBJECT
public:
GraphicsView(QGraphicsScene *scene, QWidget *parent = NULL) : QGraphicsView(scene, parent)
{
}
protected:
virtual void resizeEvent(QResizeEvent *event) override
{
fitInView(scene()->sceneRect());
QGraphicsView::resizeEvent(event);
}
};
int main(int argc, char **argv)
{
QApplication app(argc, argv);
//![1]
QGraphicsRectWidget *button1 = new QGraphicsRectWidget;
QGraphicsRectWidget *button2 = new QGraphicsRectWidget;
QGraphicsRectWidget *button3 = new QGraphicsRectWidget;
QGraphicsRectWidget *button4 = new QGraphicsRectWidget;
button2->setZValue(1);
button3->setZValue(2);
button4->setZValue(3);
QGraphicsScene scene(0, 0, 300, 300);
scene.setBackgroundBrush(Qt::black);
scene.addItem(button1);
scene.addItem(button2);
scene.addItem(button3);
scene.addItem(button4);
//![1]
GraphicsView window(&scene);
window.setFrameStyle(0);
window.setAlignment(Qt::AlignLeft | Qt::AlignTop);
window.setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
window.setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
//![2]
QStateMachine machine;
QState *group = new QState();
group->setObjectName("group");
QTimer timer;
timer.setInterval(1250);
timer.setSingleShot(true);
QObject::connect(group, SIGNAL(entered()), &timer, SLOT(start()));
//![2]
//![3]
QState *state1;
QState *state2;
QState *state3;
QState *state4;
QState *state5;
QState *state6;
QState *state7;
state1 = createGeometryState(button1, QRect(100, 0, 50, 50),
button2, QRect(150, 0, 50, 50),
button3, QRect(200, 0, 50, 50),
button4, QRect(250, 0, 50, 50),
group);
//![3]
state2 = createGeometryState(button1, QRect(250, 100, 50, 50),
button2, QRect(250, 150, 50, 50),
button3, QRect(250, 200, 50, 50),
button4, QRect(250, 250, 50, 50),
group);
state3 = createGeometryState(button1, QRect(150, 250, 50, 50),
button2, QRect(100, 250, 50, 50),
button3, QRect(50, 250, 50, 50),
button4, QRect(0, 250, 50, 50),
group);
state4 = createGeometryState(button1, QRect(0, 150, 50, 50),
button2, QRect(0, 100, 50, 50),
button3, QRect(0, 50, 50, 50),
button4, QRect(0, 0, 50, 50),
group);
state5 = createGeometryState(button1, QRect(100, 100, 50, 50),
button2, QRect(150, 100, 50, 50),
button3, QRect(100, 150, 50, 50),
button4, QRect(150, 150, 50, 50),
group);
state6 = createGeometryState(button1, QRect(50, 50, 50, 50),
button2, QRect(200, 50, 50, 50),
button3, QRect(50, 200, 50, 50),
button4, QRect(200, 200, 50, 50),
group);
//![4]
state7 = createGeometryState(button1, QRect(0, 0, 50, 50),
button2, QRect(250, 0, 50, 50),
button3, QRect(0, 250, 50, 50),
button4, QRect(250, 250, 50, 50),
group);
group->setInitialState(state1);
//![4]
//![5]
QParallelAnimationGroup animationGroup;
QSequentialAnimationGroup *subGroup;
QPropertyAnimation *anim = new QPropertyAnimation(button4, "geometry");
anim->setDuration(1000);
anim->setEasingCurve(QEasingCurve::OutElastic);
animationGroup.addAnimation(anim);
//![5]
//![6]
subGroup = new QSequentialAnimationGroup(&animationGroup);
subGroup->addPause(100);
anim = new QPropertyAnimation(button3, "geometry");
anim->setDuration(1000);
anim->setEasingCurve(QEasingCurve::OutElastic);
subGroup->addAnimation(anim);
//![6]
subGroup = new QSequentialAnimationGroup(&animationGroup);
subGroup->addPause(150);
anim = new QPropertyAnimation(button2, "geometry");
anim->setDuration(1000);
anim->setEasingCurve(QEasingCurve::OutElastic);
subGroup->addAnimation(anim);
subGroup = new QSequentialAnimationGroup(&animationGroup);
subGroup->addPause(200);
anim = new QPropertyAnimation(button1, "geometry");
anim->setDuration(1000);
anim->setEasingCurve(QEasingCurve::OutElastic);
subGroup->addAnimation(anim);
//![7]
StateSwitcher *stateSwitcher = new StateSwitcher(&machine);
stateSwitcher->setObjectName("stateSwitcher");
group->addTransition(&timer, SIGNAL(timeout()), stateSwitcher);
stateSwitcher->addState(state1, &animationGroup);
stateSwitcher->addState(state2, &animationGroup);
//![7]
stateSwitcher->addState(state3, &animationGroup);
stateSwitcher->addState(state4, &animationGroup);
stateSwitcher->addState(state5, &animationGroup);
stateSwitcher->addState(state6, &animationGroup);
//![8]
stateSwitcher->addState(state7, &animationGroup);
//![8]
//![9]
machine.addState(group);
machine.setInitialState(group);
machine.start();
//![9]
window.resize(300, 300);
window.show();
qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
return app.exec();
}
#include "main.moc"