HorizontalScrollBar.qml 4.37 KB
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/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of Qt Creator.
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**
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** 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 Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
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**
** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
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****************************************************************************/
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import QtQuick 2.1
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Item {
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    property variant flickable: this;
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    property int viewPosition: 0;
    property int viewSize: ( flickable.width>=0 ? flickable.width : 0 );
    property int contentSize: ( flickable.contentWidth >= 0 ? flickable.contentWidth : 0 );

    signal unFocus();

    id: horizontalScrollbar
    width: 300
    height: 10

    onViewPositionChanged: flickable.contentX=viewPosition;
    onViewSizeChanged: {
        if ((contentSize > viewSize) && (viewPosition > contentSize - viewSize))
            viewPosition = contentSize - viewSize;
    }

    function contentSizeDecreased()  {
        if ((contentSize > viewSize) && (viewPosition > contentSize - viewSize))
            viewPosition = contentSize - viewSize;
    }

    Rectangle {
        id: groove
        width: parent.width - 4
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        height: 10
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        color: "#444444"
        border.width: 1
        border.color: "#333333"
        anchors.right: parent.right
        anchors.rightMargin: 2
        anchors.left: parent.left
        anchors.leftMargin: 2
        anchors.verticalCenter: parent.verticalCenter
        x: 2
    }

    // the scrollbar
    Item {
        id: bar
        width: parent.width
        height: parent.height
        x: Math.floor( (horizontalScrollbar.contentSize > 0 ? horizontalScrollbar.viewPosition * horizontalScrollbar.width / horizontalScrollbar.contentSize : 0));

        Rectangle {
            id: handle
            width: {
                if (horizontalScrollbar.contentSize > 0) {
                    if (horizontalScrollbar.viewSize > horizontalScrollbar.contentSize || parent.width < 0) {
                        horizontalScrollbar.visible = false;
                        return parent.width;
                    } else {
                        horizontalScrollbar.visible = true;
                        return Math.floor(horizontalScrollbar.viewSize / horizontalScrollbar.contentSize  * parent.width);
                    }
                } else {
                    return 0;
                }
            }

            height: parent.height
            y:0
            border.color: "#333333"
            border.width: 1

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            color: "#656565"
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            MouseArea {
                property int dragging:0;
                property int originalX:0;

                anchors.fill: parent
                onPressed: { dragging = 1; originalX = mouse.x; horizontalScrollbar.unFocus(); }
                onReleased: { dragging = 0; }
                onPositionChanged: {
                    if (dragging) {
                        var newX = mouse.x - originalX + bar.x;
                        if (newX<0) newX=0;
                        if (newX>horizontalScrollbar.width - handle.width)
                            newX=horizontalScrollbar.width - handle.width;
                        horizontalScrollbar.viewPosition = (newX * horizontalScrollbar.contentSize / horizontalScrollbar.width);
                    }
                }
            }
        }
    }
}