327 lines
10 KiB
C++
327 lines
10 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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** the names of its contributors may be used to endorse or promote
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** products derived from this software without specific prior written
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** permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtCore>
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#include <QtGui>
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//![15]
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class StateSwitchEvent: public QEvent
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{
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public:
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StateSwitchEvent()
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: QEvent(Type(StateSwitchType))
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{
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}
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StateSwitchEvent(int rand)
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: QEvent(Type(StateSwitchType)),
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m_rand(rand)
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{
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}
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enum { StateSwitchType = QEvent::User + 256 };
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int rand() const { return m_rand; }
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private:
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int m_rand;
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};
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//![15]
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//![16]
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class QGraphicsRectWidget : public QGraphicsWidget
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{
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public:
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void paint(QPainter *painter, const QStyleOptionGraphicsItem *,
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QWidget *)
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{
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painter->fillRect(rect(), Qt::blue);
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}
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};
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//![16]
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class StateSwitchTransition: public QAbstractTransition
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{
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public:
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StateSwitchTransition(int rand)
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: QAbstractTransition(),
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m_rand(rand)
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{
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}
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protected:
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//![14]
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virtual bool eventTest(QEvent *event)
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{
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return (event->type() == QEvent::Type(StateSwitchEvent::StateSwitchType))
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&& (static_cast<StateSwitchEvent *>(event)->rand() == m_rand);
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}
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//![14]
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virtual void onTransition(QEvent *) {}
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private:
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int m_rand;
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};
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//![10]
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class StateSwitcher : public QState
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{
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Q_OBJECT
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public:
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StateSwitcher(QStateMachine *machine)
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: QState(machine), m_stateCount(0), m_lastIndex(0)
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{ }
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//![10]
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//![11]
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virtual void onEntry(QEvent *)
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{
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int n;
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while ((n = (qrand() % m_stateCount + 1)) == m_lastIndex)
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{ }
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m_lastIndex = n;
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machine()->postEvent(new StateSwitchEvent(n));
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}
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virtual void onExit(QEvent *) {}
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//![11]
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//![12]
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void addState(QState *state, QAbstractAnimation *animation) {
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StateSwitchTransition *trans = new StateSwitchTransition(++m_stateCount);
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trans->setTargetState(state);
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addTransition(trans);
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trans->addAnimation(animation);
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}
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//![12]
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private:
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int m_stateCount;
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int m_lastIndex;
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};
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//![13]
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QState *createGeometryState(QObject *w1, const QRect &rect1,
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QObject *w2, const QRect &rect2,
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QObject *w3, const QRect &rect3,
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QObject *w4, const QRect &rect4,
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QState *parent)
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{
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QState *result = new QState(parent);
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result->assignProperty(w1, "geometry", rect1);
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result->assignProperty(w2, "geometry", rect2);
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result->assignProperty(w3, "geometry", rect3);
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result->assignProperty(w4, "geometry", rect4);
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return result;
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}
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//![13]
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class GraphicsView : public QGraphicsView
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{
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Q_OBJECT
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public:
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GraphicsView(QGraphicsScene *scene, QWidget *parent = NULL) : QGraphicsView(scene, parent)
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{
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}
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protected:
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virtual void resizeEvent(QResizeEvent *event)
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{
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fitInView(scene()->sceneRect());
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QGraphicsView::resizeEvent(event);
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}
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};
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int main(int argc, char **argv)
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{
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QApplication app(argc, argv);
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//![1]
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QGraphicsRectWidget *button1 = new QGraphicsRectWidget;
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QGraphicsRectWidget *button2 = new QGraphicsRectWidget;
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QGraphicsRectWidget *button3 = new QGraphicsRectWidget;
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QGraphicsRectWidget *button4 = new QGraphicsRectWidget;
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button2->setZValue(1);
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button3->setZValue(2);
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button4->setZValue(3);
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QGraphicsScene scene(0, 0, 300, 300);
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scene.setBackgroundBrush(Qt::black);
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scene.addItem(button1);
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scene.addItem(button2);
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scene.addItem(button3);
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scene.addItem(button4);
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//![1]
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GraphicsView window(&scene);
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window.setFrameStyle(0);
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window.setAlignment(Qt::AlignLeft | Qt::AlignTop);
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window.setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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window.setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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//![2]
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QStateMachine machine;
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QState *group = new QState();
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group->setObjectName("group");
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QTimer timer;
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timer.setInterval(1250);
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timer.setSingleShot(true);
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QObject::connect(group, SIGNAL(entered()), &timer, SLOT(start()));
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//![2]
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//![3]
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QState *state1;
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QState *state2;
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QState *state3;
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QState *state4;
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QState *state5;
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QState *state6;
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QState *state7;
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state1 = createGeometryState(button1, QRect(100, 0, 50, 50),
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button2, QRect(150, 0, 50, 50),
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button3, QRect(200, 0, 50, 50),
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button4, QRect(250, 0, 50, 50),
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group);
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//![3]
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state2 = createGeometryState(button1, QRect(250, 100, 50, 50),
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button2, QRect(250, 150, 50, 50),
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button3, QRect(250, 200, 50, 50),
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button4, QRect(250, 250, 50, 50),
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group);
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state3 = createGeometryState(button1, QRect(150, 250, 50, 50),
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button2, QRect(100, 250, 50, 50),
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button3, QRect(50, 250, 50, 50),
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button4, QRect(0, 250, 50, 50),
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group);
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state4 = createGeometryState(button1, QRect(0, 150, 50, 50),
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button2, QRect(0, 100, 50, 50),
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button3, QRect(0, 50, 50, 50),
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button4, QRect(0, 0, 50, 50),
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group);
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state5 = createGeometryState(button1, QRect(100, 100, 50, 50),
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button2, QRect(150, 100, 50, 50),
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button3, QRect(100, 150, 50, 50),
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button4, QRect(150, 150, 50, 50),
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group);
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state6 = createGeometryState(button1, QRect(50, 50, 50, 50),
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button2, QRect(200, 50, 50, 50),
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button3, QRect(50, 200, 50, 50),
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button4, QRect(200, 200, 50, 50),
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group);
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//![4]
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state7 = createGeometryState(button1, QRect(0, 0, 50, 50),
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button2, QRect(250, 0, 50, 50),
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button3, QRect(0, 250, 50, 50),
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button4, QRect(250, 250, 50, 50),
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group);
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group->setInitialState(state1);
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//![4]
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//![5]
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QParallelAnimationGroup animationGroup;
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QSequentialAnimationGroup *subGroup;
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QPropertyAnimation *anim = new QPropertyAnimation(button4, "geometry");
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anim->setDuration(1000);
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anim->setEasingCurve(QEasingCurve::OutElastic);
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animationGroup.addAnimation(anim);
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//![5]
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//![6]
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subGroup = new QSequentialAnimationGroup(&animationGroup);
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subGroup->addPause(100);
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anim = new QPropertyAnimation(button3, "geometry");
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anim->setDuration(1000);
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anim->setEasingCurve(QEasingCurve::OutElastic);
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subGroup->addAnimation(anim);
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//![6]
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subGroup = new QSequentialAnimationGroup(&animationGroup);
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subGroup->addPause(150);
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anim = new QPropertyAnimation(button2, "geometry");
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anim->setDuration(1000);
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anim->setEasingCurve(QEasingCurve::OutElastic);
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subGroup->addAnimation(anim);
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subGroup = new QSequentialAnimationGroup(&animationGroup);
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subGroup->addPause(200);
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anim = new QPropertyAnimation(button1, "geometry");
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anim->setDuration(1000);
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anim->setEasingCurve(QEasingCurve::OutElastic);
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subGroup->addAnimation(anim);
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//![7]
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StateSwitcher *stateSwitcher = new StateSwitcher(&machine);
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stateSwitcher->setObjectName("stateSwitcher");
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group->addTransition(&timer, SIGNAL(timeout()), stateSwitcher);
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stateSwitcher->addState(state1, &animationGroup);
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stateSwitcher->addState(state2, &animationGroup);
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//![7]
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stateSwitcher->addState(state3, &animationGroup);
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stateSwitcher->addState(state4, &animationGroup);
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stateSwitcher->addState(state5, &animationGroup);
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stateSwitcher->addState(state6, &animationGroup);
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//![8]
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stateSwitcher->addState(state7, &animationGroup);
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//![8]
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//![9]
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machine.addState(group);
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machine.setInitialState(group);
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machine.start();
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//![9]
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#if defined(Q_WS_S60) || defined(Q_WS_MAEMO_5)
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window.showMaximized();
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window.fitInView(scene.sceneRect() );
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#else
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window.resize(300, 300);
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window.show();
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#endif
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qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
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return app.exec();
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}
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#include "main.moc"
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