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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/

import QtQuick 1.0

Item {
    id: slider; width: 400; height: 16

    // value is read/write.
    property real value: 1
    onValueChanged: updatePos();
    property real maximum: 1
    property real minimum: 1
    property int xMax: width - handle.width - 4
    onXMaxChanged: updatePos();
    onMinimumChanged: updatePos();

    function updatePos() {
        if (maximum > minimum) {
            var pos = 2 + (value - minimum) * slider.xMax / (maximum - minimum);
            pos = Math.min(pos, width - handle.width - 2);
            pos = Math.max(pos, 2);
            handle.x = pos;
        } else {
            handle.x = 2;
        }
    }

    Rectangle {
        anchors.fill: parent
        border.color: "white"; border.width: 0; radius: 8
        gradient: Gradient {
            GradientStop { position: 0.0; color: "#66343434" }
            GradientStop { position: 1.0; color: "#66000000" }
        }
    }

    Rectangle {
        id: handle; smooth: true
        y: 2; width: 30; height: slider.height-4; radius: 6
        gradient: Gradient {
            GradientStop { position: 0.0; color: "lightgray" }
            GradientStop { position: 1.0; color: "gray" }
        }

        MouseArea {
            id: mouse
            anchors.fill: parent; drag.target: parent
            drag.axis: Drag.XAxis; drag.minimumX: 2; drag.maximumX: slider.xMax+2
            onPositionChanged: { value = (maximum - minimum) * (handle.x-2) / slider.xMax + minimum; }
        }
    }
}