/*
 *   Copyright 2015 Marco Martin <notmart@gmail.com>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Library General Public License as
 *   published by the Free Software Foundation; either version 2, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU Library General Public License for more details
 *
 *   You should have received a copy of the GNU Library General Public
 *   License along with this program; if not, write to the
 *   Free Software Foundation, Inc.,
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

import QtQuick 2.4
import QtQuick.Layouts 1.1
import org.kde.plasma.core 2.0 as PlasmaCore
import org.kde.plasma.components 2.0 as PlasmaComponents

Item {
    id: delegateRoot
    implicitWidth: delegate.implicitWidth
    implicitHeight: delegate.implicitHeight + (slider.opacity > 0 ? slider.height : 0)

    property int screenBrightness
    readonly property int maximumScreenBrightness: pmSource.data["PowerDevil"] ? pmSource.data["PowerDevil"]["Maximum Screen Brightness"] || 0 : 0

    PlasmaCore.DataSource {
        id: pmSource
        engine: "powermanagement"
        connectedSources: ["PowerDevil"]

        onDataChanged: {
            delegateRoot.screenBrightness = source.data["PowerDevil"]["Screen Brightness"];
        }
    }

    Delegate {
        id: delegate
        toggled: slider.opacity > 0
        function toggle() {
            slider.opacity = slider.opacity > 0 ? 0 : 1;
        }
    }
    PlasmaComponents.Slider {
        id: slider
        anchors.top: delegate.bottom
        width: flow.width
        opacity: 0
        x: -delegateRoot.parent.x
        value: screenBrightness
        minimumValue: maximumValue > 100 ? 1 : 0
        maximumValue: delegateRoot.maximumScreenBrightness
        Behavior on opacity {
            OpacityAnimator {
                duration: units.shortDuration
                easing.type: Easing.InOutQuad
            }
        }
    }

    onScreenBrightnessChanged: {
        var service = pmSource.serviceForSource("PowerDevil");
        var operation = service.operationDescription("setBrightness");
        operation.brightness = slider.value;
        operation.silent = true
        service.startOperationCall(operation);
    }
}