1 files changed, 158 insertions, 0 deletions
diff --git a/examples/statemachine/trafficlight/main.cpp b/examples/statemachine/trafficlight/main.cpp
new file mode 100644
index 0000000..fbb6b68
--- /dev/null
+++ b/examples/statemachine/trafficlight/main.cpp
@@ -0,0 +1,158 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the $MODULE$ of the Qt Toolkit.
+**
+** $TROLLTECH_DUAL_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#ifdef QT_STATEMACHINE_SOLUTION
+#include <qstate.h>
+#include <qstatemachine.h>
+#include <qfinalstate.h>
+#endif
+
+//! [0]
+class LightWidget : public QWidget
+{
+    Q_OBJECT
+    Q_PROPERTY(bool on READ isOn WRITE setOn)
+public:
+    LightWidget(const QColor &color, QWidget *parent = 0)
+        : QWidget(parent), m_color(color), m_on(false) {}
+
+    bool isOn() const
+        { return m_on; }
+    void setOn(bool on)
+    {
+        if (on == m_on)
+            return;
+        m_on = on;
+        update();
+    }
+
+protected:
+    virtual void paintEvent(QPaintEvent *)
+    {
+        if (!m_on)
+            return;
+        QPainter painter(this);
+        painter.setRenderHint(QPainter::Antialiasing);
+        painter.setBrush(m_color);
+        painter.drawEllipse(0, 0, width(), height());
+    }
+
+private:
+    QColor m_color;
+    bool m_on;
+};
+//! [0]
+
+//! [1]
+class LightState : public QState
+{
+public:
+    LightState(LightWidget *light, int duration, QState *parent = 0)
+        : QState(parent)
+    {
+        QTimer *timer = new QTimer(this);
+        timer->setInterval(duration);
+        timer->setSingleShot(true);
+        QState *timing = new QState(this);
+        timing->setPropertyOnEntry(light, "on", true);
+        timing->invokeMethodOnEntry(timer, "start");
+        timing->setPropertyOnExit(light, "on", false);
+        QFinalState *done = new QFinalState(this);
+        timing->addTransition(timer, SIGNAL(timeout()), done);
+        setInitialState(timing);
+    }
+};
+//! [1]
+
+//! [2]
+class TrafficLightWidget : public QWidget
+{
+public:
+    TrafficLightWidget(QWidget *parent = 0)
+        : QWidget(parent)
+    {
+        QVBoxLayout *vbox = new QVBoxLayout(this);
+        m_red = new LightWidget(Qt::red);
+        vbox->addWidget(m_red);
+        m_yellow = new LightWidget(Qt::yellow);
+        vbox->addWidget(m_yellow);
+        m_green = new LightWidget(Qt::green);
+        vbox->addWidget(m_green);
+        QPalette pal = palette();
+        pal.setColor(QPalette::Background, Qt::black);
+        setPalette(pal);
+        setAutoFillBackground(true);
+    }
+
+    LightWidget *redLight() const
+        { return m_red; }
+    LightWidget *yellowLight() const
+        { return m_yellow; }
+    LightWidget *greenLight() const
+        { return m_green; }
+
+private:
+    LightWidget *m_red;
+    LightWidget *m_yellow;
+    LightWidget *m_green;
+};
+//! [2]
+
+//! [3]
+class TrafficLight : public QWidget
+{
+public:
+    TrafficLight(QWidget *parent = 0)
+        : QWidget(parent)
+    {
+        QVBoxLayout *vbox = new QVBoxLayout(this);
+        TrafficLightWidget *widget = new TrafficLightWidget();
+        vbox->addWidget(widget);
+
+        QStateMachine *machine = new QStateMachine(this);
+        LightState *redGoingYellow = new LightState(widget->redLight(), 3000);
+        redGoingYellow->setObjectName("redGoingYellow");
+        LightState *yellowGoingGreen = new LightState(widget->yellowLight(), 1000);
+        yellowGoingGreen->setObjectName("yellowGoingGreen");
+        redGoingYellow->addFinishedTransition(yellowGoingGreen);
+        LightState *greenGoingYellow = new LightState(widget->greenLight(), 3000);
+        greenGoingYellow->setObjectName("greenGoingYellow");
+        yellowGoingGreen->addFinishedTransition(greenGoingYellow);
+        LightState *yellowGoingRed = new LightState(widget->yellowLight(), 1000);
+        yellowGoingRed->setObjectName("yellowGoingRed");
+        greenGoingYellow->addFinishedTransition(yellowGoingRed);
+        yellowGoingRed->addFinishedTransition(redGoingYellow);
+
+        machine->addState(redGoingYellow);
+        machine->addState(yellowGoingGreen);
+        machine->addState(greenGoingYellow);
+        machine->addState(yellowGoingRed);
+        machine->setInitialState(redGoingYellow);
+        machine->start();
+    }
+};
+//! [3]
+
+//! [4]
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+
+    TrafficLight widget;
+    widget.resize(120, 300);
+    widget.show();
+
+    return app.exec();
+}
+//! [4]
+
+#include "main.moc"