Provide a simplified traffic light example

The traffic light QML examples are very large for the simple task they
perform. Of course we want nicely designed examples that follow all the
patterns we recommend for writing QML. However, we also want to show
the simplest way to bind states to QML properties. This is why we need
a simplified example in addition to the others.

Change-Id: I37022db162353c9bac4bfd775571d4afb666b357
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>

8 files changed, 328 insertions, 0 deletions

diff --git a/examples/scxml/scxml.pro b/examples/scxml/scxml.pro
index 7a93fd4..9da27ce 100644
--- a/examples/scxml/scxml.pro
+++ b/examples/scxml/scxml.pro
@@ -14,6 +14,7 @@ qtHaveModule(qml) {
     SUBDIRS +=  calculator-qml
     SUBDIRS +=  trafficlight-qml-static
     SUBDIRS +=  trafficlight-qml-dynamic
+    SUBDIRS +=  trafficlight-qml-simple
     SUBDIRS +=  mediaplayer-qml-static
     SUBDIRS +=  mediaplayer-qml-dynamic
 
diff --git a/examples/scxml/trafficlight-qml-simple/Light.qml b/examples/scxml/trafficlight-qml-simple/Light.qml
new file mode 100644
index 0000000..8502d35
--- /dev/null
+++ b/examples/scxml/trafficlight-qml-simple/Light.qml
@@ -0,0 +1,65 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtScxml 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,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.5
+
+Item {
+    property color color
+    height: parent.height / 3
+    width: height
+
+    Rectangle {
+        anchors.fill: parent
+        anchors.margins: 3
+        color: parent.color
+        radius: width
+    }
+}
+
diff --git a/examples/scxml/trafficlight-qml-simple/TrafficLight.qml b/examples/scxml/trafficlight-qml-simple/TrafficLight.qml
new file mode 100644
index 0000000..da51ded
--- /dev/null
+++ b/examples/scxml/trafficlight-qml-simple/TrafficLight.qml
@@ -0,0 +1,108 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtScxml 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,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.5
+import QtQuick.Window 2.2
+import TrafficLightStateMachine 1.0
+
+Window {
+    id: root
+    visible: true
+    width: 100
+    height: 350
+
+    TrafficLightStateMachine {
+        id: stateMachine
+        running: true
+    }
+
+    Item {
+        id: lights
+        width: parent.width
+        height: 300
+
+        Light {
+            anchors.top: parent.top
+            color: "red"
+            visible: stateMachine.red || stateMachine.redGoingGreen
+        }
+
+        Light {
+            anchors.centerIn: parent
+            color: "yellow"
+            visible: stateMachine.yellow || stateMachine.blinking
+        }
+
+        Light {
+            anchors.bottom: parent.bottom
+            color: "green"
+            visible: stateMachine.green
+        }
+    }
+
+    Rectangle {
+        anchors.top: lights.bottom
+        anchors.bottom: parent.bottom
+        width: parent.width
+        border.color: "black"
+
+        Text {
+            anchors.fill: parent
+            text: stateMachine.working ? "Pause" : "Unpause"
+            horizontalAlignment: Text.AlignHCenter
+            verticalAlignment: Text.AlignVCenter
+        }
+
+        MouseArea {
+            anchors.fill: parent
+            onClicked: stateMachine.submitEvent(stateMachine.working ? "smash" : "repair");
+        }
+    }
+}
diff --git a/examples/scxml/trafficlight-qml-simple/doc/images/trafficlight.png b/examples/scxml/trafficlight-qml-simple/doc/images/trafficlight.png
new file mode 100644
index 0000000..ddd7431
--- /dev/null
+++ b/examples/scxml/trafficlight-qml-simple/doc/images/trafficlight.png
diff --git a/examples/scxml/trafficlight-qml-simple/doc/src/trafficlight-qml-simple.qdoc b/examples/scxml/trafficlight-qml-simple/doc/src/trafficlight-qml-simple.qdoc
new file mode 100644
index 0000000..f66f5f7
--- /dev/null
+++ b/examples/scxml/trafficlight-qml-simple/doc/src/trafficlight-qml-simple.qdoc
@@ -0,0 +1,63 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:FDL$
+** 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.
+**
+** GNU Free Documentation License Usage
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of
+** this file. Please review the following information to ensure
+** the GNU Free Documentation License version 1.3 requirements
+** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \example trafficlight-qml-simple
+    \title Qt SCXML Traffic Light QML Example (Simple)
+    \ingroup examples-qtscxml
+
+    \brief A Qt Quick application that uses a compiled state machine to
+    implement a simplified traffic light.
+
+    \image trafficlight.png
+
+    \e{Traffic Light QML Example (Simple)} demonstrates how to connect to the
+    active properties of a state in a state machine that is compiled to a class.
+
+    The UI is created using Qt Quick.
+
+    \include examples-run.qdocinc
+
+    \include trafficlight-compiling.qdocinc
+
+    \section1 Instantiating the State Machine
+
+    We instantiate the state machine as follows:
+
+    \quotefromfile trafficlight-qml-simple/TrafficLight.qml
+
+    \skipto TrafficLightStateMachine {
+    \printuntil }
+
+    \include trafficlight-state-machine.qdocinc
+
+    We connect to the states as follows:
+
+    \quotefromfile trafficlight-qml-simple/TrafficLight.qml
+    \skipto Light {
+    \printuntil /^ {4}\}/
+*/
diff --git a/examples/scxml/trafficlight-qml-simple/trafficlight-qml-simple.cpp b/examples/scxml/trafficlight-qml-simple/trafficlight-qml-simple.cpp
new file mode 100644
index 0000000..c9950c4
--- /dev/null
+++ b/examples/scxml/trafficlight-qml-simple/trafficlight-qml-simple.cpp
@@ -0,0 +1,71 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtScxml 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,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QGuiApplication>
+#include <QQmlApplicationEngine>
+#include <QQmlContext>
+
+#include "statemachine.h"
+
+int main(int argc, char *argv[])
+{
+    QGuiApplication app(argc, argv);
+
+    qmlRegisterType<TrafficLightStateMachine>("TrafficLightStateMachine", 1, 0,
+                                              "TrafficLightStateMachine");
+
+    QQmlApplicationEngine engine;
+    engine.load(QUrl(QStringLiteral("qrc:/TrafficLight.qml")));
+    if (engine.rootObjects().isEmpty())
+        return -1;
+
+    return app.exec();
+}
+
diff --git a/examples/scxml/trafficlight-qml-simple/trafficlight-qml-simple.pro b/examples/scxml/trafficlight-qml-simple/trafficlight-qml-simple.pro
new file mode 100644
index 0000000..4de04ea
--- /dev/null
+++ b/examples/scxml/trafficlight-qml-simple/trafficlight-qml-simple.pro
@@ -0,0 +1,14 @@
+TEMPLATE = app
+
+QT += qml scxml
+CONFIG += c++11
+
+SOURCES += trafficlight-qml-simple.cpp
+
+RESOURCES += trafficlight-qml-simple.qrc
+
+STATECHARTS = ../trafficlight-common/statemachine.scxml
+
+target.path = $$[QT_INSTALL_EXAMPLES]/scxml/trafficlight-qml-simple
+INSTALLS += target
+
diff --git a/examples/scxml/trafficlight-qml-simple/trafficlight-qml-simple.qrc b/examples/scxml/trafficlight-qml-simple/trafficlight-qml-simple.qrc
new file mode 100644
index 0000000..bb75dba
--- /dev/null
+++ b/examples/scxml/trafficlight-qml-simple/trafficlight-qml-simple.qrc
@@ -0,0 +1,6 @@
+<RCC>
+    <qresource prefix="/">
+        <file>TrafficLight.qml</file>
+        <file>Light.qml</file>
+    </qresource>
+</RCC>