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/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Quick Controls 2 module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** 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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://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.LGPLv3 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.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 later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

import QtQuick
import QtQuick.NativeStyle as NativeStyle

NativeStyle.DefaultScrollBar {
    id: controlRoot

    topPadding: orientation == Qt.Vertical ? 17 : 0
    bottomPadding: orientation == Qt.Vertical ? 17 : 0
    leftPadding: orientation == Qt.Horizontal ? 17 : 0
    rightPadding: orientation == Qt.Horizontal ? 17 : 0

    contentItem: NativeStyle.ScrollBar {
        control: controlRoot
        subControl: NativeStyle.ScrollBar.Handle
    }

    NativeStyle.ScrollBar {
        // Fade a hovered-looking version of the handle
        // on top of the default handle when hovering it
        x: contentItem.x
        y: contentItem.y
        z: 1
        width: contentItem.width
        height: contentItem.height
        control: controlRoot
        subControl: NativeStyle.ScrollBar.Handle
        overrideState: NativeStyle.StyleItem.AlwaysHovered
        opacity: controlRoot.hovered || control.pressed ? 1 : 0
        visible: contentItem instanceof NativeStyle.StyleItem
        Behavior on opacity { NumberAnimation { duration: contentItem.transitionDuration } }
    }

    // The groove background should have window color
    Rectangle {
        x: background.x
        y: background.y
        z: -1
        width: background.width
        height: background.height
        color: controlRoot.palette.window
    }

    background: NativeStyle.ScrollBar {
        control: controlRoot
        subControl: NativeStyle.ScrollBar.Groove
        overrideState: NativeStyle.ScrollBar.NeverHovered
    }
}