95 lines
3.8 KiB
QML
95 lines
3.8 KiB
QML
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the Qt Quick Extras module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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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
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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import QtQuick 2.2
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QtObject {
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id: handleStyleHelper
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property color handleColorTop: "#969696"
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property color handleColorBottom: Qt.rgba(0.9, 0.9, 0.9, 0.298)
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property real handleColorBottomStop: 0.7
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property color handleRingColorTop: "#b0b0b0"
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property color handleRingColorBottom: "transparent"
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/*!
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If \a ctx is the only argument, this is equivalent to calling
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paintHandle(\c ctx, \c 0, \c 0, \c ctx.canvas.width, \c ctx.canvas.height).
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*/
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function paintHandle(ctx, handleX, handleY, handleWidth, handleHeight) {
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ctx.reset();
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if (handleWidth < 0)
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return;
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if (arguments.length == 1) {
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handleX = 0;
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handleY = 0;
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handleWidth = ctx.canvas.width;
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handleHeight = ctx.canvas.height;
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}
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ctx.beginPath();
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var gradient = ctx.createRadialGradient(handleX, handleY, 0,
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handleX, handleY, handleWidth * 1.5);
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gradient.addColorStop(0, handleColorTop);
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gradient.addColorStop(handleColorBottomStop, handleColorBottom);
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ctx.ellipse(handleX, handleY, handleWidth, handleHeight);
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ctx.fillStyle = gradient;
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ctx.fill();
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/* Draw the ring gradient around the handle. */
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// Clip first, so we only draw inside the ring.
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ctx.beginPath();
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ctx.ellipse(handleX, handleY, handleWidth, handleHeight);
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ctx.ellipse(handleX + 2, handleY + 2, handleWidth - 4, handleHeight - 4);
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ctx.clip();
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ctx.beginPath();
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gradient = ctx.createLinearGradient(handleX + handleWidth / 2, handleY,
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handleX + handleWidth / 2, handleY + handleHeight);
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gradient.addColorStop(0, handleRingColorTop);
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gradient.addColorStop(1, handleRingColorBottom);
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ctx.ellipse(handleX, handleY, handleWidth, handleHeight);
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ctx.fillStyle = gradient;
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ctx.fill();
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}
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}
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