Switch.qml Example File

 /****************************************************************************
 **
 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** 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 Nokia Corporation 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
 ** 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 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 }
     }
 }