/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module 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 Qt 4.7
import Qt.labs.gestures 2.0



Rectangle {
    id: volume
    gradient: Gradient {
        GradientStop { position: 0.0; color: "red" }
        GradientStop { position: 0.33; color: "yellow" }
        GradientStop { position: 1.0; color: "green" }
    }
    property int volumeValue : 0

    Rectangle {
        id: leftBorder
        color: "blue"
        anchors.top: parent.top
        anchors.bottom: parent.bottom
        anchors.left: parent.left
        width: volume.width/50
    }

    Rectangle {
        id: volumeDrag
        color: "grey"
        anchors.top:parent.top
        anchors.right: rightBorder.left
        anchors.left: leftBorder.right
        height: 100
    }

    Text {
        id: label
        anchors.bottom: parent.bottom
        anchors.horizontalCenter: parent.horizontalCenter
        text: volumeValue + "%"
        font.pointSize: 8

    }

    Rectangle {
        id: rightBorder
        color: "blue"
        anchors.top: parent.top
        anchors.bottom: parent.bottom
        anchors.right: parent.right
        width: volume.width/50
    }

    function updateDrag() {
        volumeDrag.height = parent.height - (parent.height / 100 * volumeValue)
    }

    function updateFontSize(size){
        label.font.pointSize = size
    }


    onHeightChanged: updateDrag()

    GestureArea {
        id: volumeGA
        anchors.fill: parent
        Pan {
            onUpdated: {
                volumeValue = 100 / parent.height * (parent.height - volumeDrag.height - gesture.delta.y)
                if(volumeValue > 100)
                    volumeValue = 100
                else if(volumeValue < 0)
                    volumeValue = 0
                updateDrag()
            }
        }
    }
}