battery-subscriber.qml Example File

 /****************************************************************************
 **
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
 ** This file is part of the examples of the Qt Mobility Components.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** 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
 ** 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 Qt 4.7
 import QtMobility.publishsubscribe 1.1
 import Qt.labs.particles 1.0
 import "content"

 Rectangle {
     color: "white"
     width: 100
     height: 230

     Rectangle {
         x: 20
         y: 10
         width: 60
         height: 10
         color: "black"
     }

     Rectangle {
         x: 10
         y: 20
         width: 80
         height: 200
         color: "black"
     }

     Rectangle {
         id: visualCharge
         x: 12
         y: 22 + 196 - height
         width: 76
         height: 196 * batteryCharge.value / 100
         clip: true
         color: "green"

         Particles {
             id: bubbles
             width: parent.width
             anchors.bottom: parent.bottom
             source: "content/bubble.png"
             count: 0
             velocity: 30
             velocityDeviation: 10
             angle: -90
             //lifeSpan: parent.height * 1000 / (velocity + velocityDeviation / 2)
             lifeSpan: parent.height * 1000 / (30 + 10 / 2)
         }

         states: [
         State {
             name: "charging"
             when: batteryCharging.value
             PropertyChanges {
                 target: bubbles
                 count: batteryCharge.value / 5
                 emissionRate: 5
             }
         },
         State {
             name: "low"
             when: batteryCharge.value < 25 && !batteryCharging.value
             PropertyChanges {
                 target: visualCharge
                 color: "red"
             }
         }
         ]

         transitions: [
         Transition {
             from: "*"
             to: "low"
             reversible: true
             ColorAnimation {
                 duration: 200
             }
         }
         ]
     }

     ValueSpaceSubscriber {
         id: batteryCharge
         path: "/power/battery/charge"
     }
     ValueSpaceSubscriber {
         id: batteryCharging
         path: "/power/battery/charging"
     }
 }