Hello,
I would like to animate my 4 QPushButton so when I click on button1 the state1 will be trigger, when I click on button2 this trigger state2 and the click on button3 trigger state3.

I tried and tried to do this but unsuccessful

my code is based on this Qt example: http://doc.trolltech.com/4.7/animation-moveblocks.html

please help me to do this and if possible simplify me the code if it's simplifiable because I don't need the random state triggering as in the above Qt example



main.cpp
Qt Code: 
  1. #include <QtCore>
  2. #include <QtGui>
  3.  
  4. class StateSwitchEvent: public QEvent
  5. {
  6. public:
  7.  
  8.     StateSwitchEvent(int rand): QEvent(Type(StateSwitchType)), m_rand(rand)
  9.     {
  10.     }
  11.  
  12.     enum { StateSwitchType = QEvent::User + 256 };
  13.     int rand() const { return m_rand; }
  14.  
  15. private:
  16.     int m_rand;
  17. };
  18.  
  19.  
  20. class StateSwitchTransition: public QAbstractTransition
  21. {
  22. public:
  23.     StateSwitchTransition(int rand): QAbstractTransition(), m_rand(rand)
  24.     {
  25.     }
  26.  
  27. protected:
  28.     virtual bool eventTest(QEvent *event)
  29.     {
  30.         return (event->type() == QEvent::Type(StateSwitchEvent::StateSwitchType))
  31.             && (static_cast<StateSwitchEvent *>(event)->rand() == m_rand);
  32.     }
  33.  
  34.     virtual void onTransition(QEvent *) {}
  35.  
  36. private:
  37.     int m_rand;
  38. };
  39.  
  40. class StateSwitcher : public QState
  41. {
  42.     Q_OBJECT
  43. public:
  44.     StateSwitcher(QStateMachine *machine): QState(machine), m_stateCount(0), m_lastIndex(0)
  45.     { }
  46.  
  47.  
  48.     virtual void onEntry(QEvent *)
  49.     {
  50.         int n;
  51.         while ((n = (qrand() % m_stateCount + 1)) == m_lastIndex)
  52.         { }
  53.         m_lastIndex = n;
  54.         machine()->postEvent(new StateSwitchEvent(n));
  55.     }
  56.     virtual void onExit(QEvent *) {}
  57.  
  58.     void addState(QState *state, QAbstractAnimation *animation) {
  59.         StateSwitchTransition *trans = new StateSwitchTransition(++m_stateCount);
  60.         trans->setTargetState(state);
  61.         addTransition(trans);
  62.         trans->addAnimation(animation);
  63.     }
  64.  
  65. private:
  66.     int m_stateCount;
  67.     int m_lastIndex;
  68. };
  69.  
  70. QState *createGeometryState(QObject *w1, const QRect &rect1,
  71.                             QObject *w2, const QRect &rect2,
  72.                             QObject *w3, const QRect &rect3,
  73.                             QObject *w4, const QRect &rect4,
  74.                             QState *parent)
  75. {
  76.     QState *result = new QState(parent);
  77.     result->assignProperty(w1, "geometry", rect1);
  78.     result->assignProperty(w2, "geometry", rect2);
  79.     result->assignProperty(w3, "geometry", rect3);
  80.     result->assignProperty(w4, "geometry", rect4);
  81.  
  82.     return result;
  83. }
  84.  
  85. int main(int argc, char **argv)
  86. {
  87.     QApplication app(argc, argv);
  88.  
  89.     QWidget window;
  90.     QPalette palette;
  91.     palette.setBrush(QPalette::Window, Qt::black);
  92.     window.setPalette(palette);
  93.     QPushButton *button1 = new QPushButton("A", &window);
  94.     QPushButton *button2 = new QPushButton("B", &window);
  95.     QPushButton *button3 = new QPushButton("C", &window);
  96.     QPushButton *button4 = new QPushButton("D", &window);
  97.  
  98.     QStateMachine machine;
  99.  
  100.     QState *group = new QState();
  101.     QTimer timer;
  102.    // timer.setInterval(2000);
  103.    // timer.setSingleShot(true);
  104.    // QObject::connect(group, SIGNAL(entered()), &timer, SLOT(start()));
  105.  
  106.     QState *state1;
  107.     QState *state2;
  108.     QState *state3;
  109.  
  110.     state1 = createGeometryState(button1, QRect(8, 5, 50, 50), button2, QRect(66, 5, 50, 50), button3, QRect(124, 5, 50, 50), button4, QRect(182, 5, 50, 50), group);
  111.     state2 = createGeometryState(button1, QRect(8, 200, 50, 50), button2, QRect(66, 200, 50, 50), button3, QRect(124, 200, 50, 50), button4, QRect(182, 200, 50, 50), group);
  112.     state3 = createGeometryState(button1, QRect(150, 100, 50, 50), button2, QRect(100, 100, 50, 50), button3, QRect(50, 100, 50, 50), button4, QRect(0, 100, 50, 50), group);
  113.  
  114.     group->setInitialState(state1);
  115.  
  116.     QParallelAnimationGroup animationGroup;
  117.     QSequentialAnimationGroup *subGroup;
  118.  
  119.     QPropertyAnimation *anim = new QPropertyAnimation(button4, "geometry");
  120.     anim->setDuration(4000);
  121.     anim->setEasingCurve(QEasingCurve::OutElastic);
  122.     animationGroup.addAnimation(anim);
  123.  
  124.     subGroup = new QSequentialAnimationGroup(&animationGroup);
  125.     subGroup->addPause(100);
  126.     anim = new QPropertyAnimation(button3, "geometry");
  127.     anim->setDuration(4000);
  128.     anim->setEasingCurve(QEasingCurve::OutElastic);
  129.     subGroup->addAnimation(anim);
  130.  
  131.  
  132.     subGroup = new QSequentialAnimationGroup(&animationGroup);
  133.     subGroup->addPause(150);
  134.     anim = new QPropertyAnimation(button2, "geometry");
  135.     anim->setDuration(4000);
  136.     anim->setEasingCurve(QEasingCurve::OutElastic);
  137.     subGroup->addAnimation(anim);
  138.  
  139.     subGroup = new QSequentialAnimationGroup(&animationGroup);
  140.     subGroup->addPause(200);
  141.     anim = new QPropertyAnimation(button1, "geometry");
  142.     anim->setDuration(4000);
  143.     anim->setEasingCurve(QEasingCurve::OutElastic);
  144.     subGroup->addAnimation(anim);
  145.  
  146.  
  147.     StateSwitcher *stateSwitcher = new StateSwitcher(&machine);
  148.     group->addTransition(&timer, SIGNAL(timeout()), stateSwitcher);
  149.     stateSwitcher->addState(state1, &animationGroup);
  150.     stateSwitcher->addState(state2, &animationGroup);
  151.     stateSwitcher->addState(state3, &animationGroup);
  152.  
  153.     //QObject::connect(button1, SIGNAL(clicked()), &group, SLOT(stateSwitcher)); //I tried to connect button1 but unsuccessful and I don't know how connect it to state1
  154.  
  155.     machine.addState(group);
  156.     machine.setInitialState(group);
  157.     machine.start();
  158.  
  159.     window.resize(250, 250);
  160.     window.show();
  161.  
  162.     return app.exec();
  163. }
  164.  
  165. #include "main.moc"
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thank you for your hep