/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Graphical Effects module.
**
** $QT_BEGIN_LICENSE:BSD$
** 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.
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**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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****************************************************************************/

import QtQuick 2.0

Image {
    id: positionPicker
    property real xValue: 0
    property real yValue: 0

    x: parent.width * xValue - positionPicker.width / 2
    y: parent.height * yValue - positionPicker.height / 2

    property alias pressed: mouseArea.pressed

    source: pressed ? "images/slider_handle_pressed.png" : "images/slider_handle.png"

    MouseArea {
        id: mouseArea

        property real startX
        property real startY

        anchors.fill: parent
        onPressed: {
            startX = mouseX;
            startY = mouseY;
        }

        onPositionChanged: {
            xValue = (positionPicker.x + positionPicker.width / 2 + mouseX - startX) / positionPicker.parent.width;
            yValue = (positionPicker.y + positionPicker.height / 2 + mouseY - startY) / positionPicker.parent.height;
        }
    }
}