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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Quick Controls module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

import QtQuick 2.2
import QtQuick.Controls 1.2
import QtQuick.Controls.Styles 1.3
import QtQuick.Controls.Private 1.0

ScrollViewStyle {
    corner: null
    incrementControl: null
    decrementControl: null
    frame: null
    scrollBarBackground: null
    padding { top: 0; left: 0; right: 0; bottom: 0 }

    __scrollBarFadeDelay: 50
    __scrollBarFadeDuration: 200
    __stickyScrollbars: true

    handle: Item {
        implicitWidth: 2.5
        implicitHeight: 2.5

        anchors.top: !styleData.horizontal ? parent.top : undefined
        anchors.left: styleData.horizontal ? parent.left : undefined
        anchors.bottom: parent.bottom
        anchors.right: parent.right

        anchors.leftMargin: implicitWidth
        anchors.topMargin: implicitHeight + 1
        anchors.rightMargin: implicitWidth * (!styleData.horizontal ? 2 : 4)
        anchors.bottomMargin: implicitHeight * (styleData.horizontal ? 2 : 4)

        Behavior on width { enabled: !styleData.horizontal; NumberAnimation { duration: 100 } }
        Behavior on height { enabled: styleData.horizontal; NumberAnimation { duration: 100 } }

        Loader {
            anchors.fill: parent
            sourceComponent: styleData.horizontal ? horzontalHandle : verticalHandle
        }

        Component {
            id: verticalHandle
            Rectangle {
                color: "black"
                opacity: 0.3
                radius: parent.parent.implicitWidth
                width: parent.width
                y: overshootBottom > 0 ? parent.height - height : 0
                height: Math.max(8, parent.height - overshootTop - overshootBottom)

                property real overshootTop: -Math.min(0, __control.flickableItem.contentY)
                property real overshootBottom: Math.max(0, __control.flickableItem.contentY
                                                        - __control.flickableItem.contentHeight
                                                        + __control.flickableItem.height)
            }
        }

        Component {
            id: horzontalHandle
            Rectangle {
                color: "black"
                opacity: 0.3
                radius: parent.parent.implicitHeight
                height: parent.height
                x: overshootRight > 0 ? parent.width - width : 0
                width: Math.max(8, parent.width - overshootLeft - overshootRight)

                property real overshootLeft: -Math.min(0, __control.flickableItem.contentX)
                property real overshootRight: Math.max(0, __control.flickableItem.contentX
                                                       - __control.flickableItem.contentWidth
                                                       + __control.flickableItem.width)
            }
        }
    }
}