Qt 4.8: Switch.qml Example File (declarative/ui-components/slideswitch/qml/slideswitch/content/Switch.qml)

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# Switch.qml Example File

declarative/ui-components/slideswitch/qml/slideswitch/content/Switch.qml

     /****************************************************************************
     **
     ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** 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 Digia Plc and its Subsidiary(-ies) 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
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     import QtQuick 1.0

     Item {
         id: toggleswitch
         width: background.width; height: background.height

         property bool on: false

         function toggle() {
             if (toggleswitch.state == "on")
                 toggleswitch.state = "off";
             else
                 toggleswitch.state = "on";
         }

         function releaseSwitch() {
             if (knob.x == 1) {
                 if (toggleswitch.state == "off") return;
             }
             if (knob.x == 78) {
                 if (toggleswitch.state == "on") return;
             }
             toggle();
         }

         Image {
             id: background
             source: "background.svg"
             MouseArea { anchors.fill: parent; onClicked: toggle() }
         }

         Image {
             id: knob
             x: 1; y: 2
             source: "knob.svg"

             MouseArea {
                 anchors.fill: parent
                 drag.target: knob; drag.axis: Drag.XAxis; drag.minimumX: 1; drag.maximumX: 78
                 onClicked: toggle()
                 onReleased: releaseSwitch()
             }
         }

         states: [
             State {
                 name: "on"
                 PropertyChanges { target: knob; x: 78 }
                 PropertyChanges { target: toggleswitch; on: true }
             },
             State {
                 name: "off"
                 PropertyChanges { target: knob; x: 1 }
                 PropertyChanges { target: toggleswitch; on: false }
             }
         ]

         transitions: Transition {
             NumberAnimation { properties: "x"; easing.type: Easing.InOutQuad; duration: 200 }
         }
     }