/****************************************************************************
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** This file is part of the demonstration applications of the Qt Toolkit.
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** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** Public License version 3.0 as published by the Free Software Foundation
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** file. Please review the following information to ensure the GNU General
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****************************************************************************/

import QtQuick 1.0
import "adjustbars.js" as AdjustBars

/* A barchart-like adjuster component. */
Rectangle {
    id: adjuster

    property real max: 100
    property real value: 0
    property bool created: false

    signal valueChanged(real value)
    signal focusChangedByClick()
    signal arrowPressedWhenValueOverLimits()

    function setValue(pValue) {
        value = pValue;
        AdjustBars.fillBars(value/max*AdjustBars.maxBars);
        valueChanged(value);
    }

    height: 60; width: 300
    color: "transparent"
    Keys.onRightPressed: {
        var val = value+max/AdjustBars.maxBars;
        if (val <= max) {
            value = val;
            AdjustBars.fillBars(value/max*AdjustBars.maxBars);
            valueChanged(value);
        }
        else {
            arrowPressedWhenValueOverLimits()
        }
    }
    Keys.onLeftPressed: {
        var val = value-max/AdjustBars.maxBars;
        if (0 <= val) {
            value = val;
            AdjustBars.fillBars(value/max*AdjustBars.maxBars);
            valueChanged(value);
        }
        else {
            arrowPressedWhenValueOverLimits()
        }
    }
    Component.onCompleted: {
        AdjustBars.createBars();
        AdjustBars.fillBars(value/max*AdjustBars.maxBars);
        created = true;
    }
    Component.onDestruction: {
        AdjustBars.destroyBars;
    }
    //Dynamic objects have to be recreated when the window size changes.
    onWidthChanged: {
        if (created) {
            AdjustBars.destroyBars();
            AdjustBars.createBars();
            AdjustBars.fillBars(value/max*AdjustBars.maxBars);
        }
    }
    onHeightChanged: {
        if (created) {
            AdjustBars.destroyBars();
            AdjustBars.createBars();
            AdjustBars.fillBars(value/max*AdjustBars.maxBars);
        }
    }

    MouseArea {
        anchors.fill: parent
        onPositionChanged: {
            focusChangedByClick();
            var val = mouse.x/parent.width*parent.max;
            if (0 < val && val < max) {
                parent.value = val;
                AdjustBars.fillBars(parent.value/parent.max*AdjustBars.maxBars);
                valueChanged(parent.value);
            }
        }
        onClicked: {
            focusChangedByClick();
            var val = mouse.x/parent.width*parent.max;
            if (0 < val && val < max) {
                parent.value = val;
                AdjustBars.fillBars(parent.value/parent.max*AdjustBars.maxBars);
                valueChanged(parent.value);
            }
        }
    }
}