1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Quick Extras 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
QtObject {
id: handleStyleHelper
property color handleColorTop: "#969696"
property color handleColorBottom: Qt.rgba(0.9, 0.9, 0.9, 0.298)
property real handleColorBottomStop: 0.7
property color handleRingColorTop: "#b0b0b0"
property color handleRingColorBottom: "transparent"
/*!
If \a ctx is the only argument, this is equivalent to calling
paintHandle(\c ctx, \c 0, \c 0, \c ctx.canvas.width, \c ctx.canvas.height).
*/
function paintHandle(ctx, handleX, handleY, handleWidth, handleHeight) {
ctx.reset();
if (handleWidth < 0)
return;
if (arguments.length == 1) {
handleX = 0;
handleY = 0;
handleWidth = ctx.canvas.width;
handleHeight = ctx.canvas.height;
}
ctx.beginPath();
var gradient = ctx.createRadialGradient(handleX, handleY, handleWidth / 2,
handleX, handleY, handleWidth);
gradient.addColorStop(0, handleColorTop);
gradient.addColorStop(handleColorBottomStop, handleColorBottom);
ctx.ellipse(handleX, handleY, handleWidth, handleHeight);
ctx.fillStyle = gradient;
ctx.fill();
/* Draw the ring gradient around the handle. */
// Clip first, so we only draw inside the ring.
ctx.beginPath();
ctx.ellipse(handleX, handleY, handleWidth, handleHeight);
ctx.ellipse(handleX + 2, handleY + 2, handleWidth - 4, handleHeight - 4);
ctx.clip();
ctx.beginPath();
gradient = ctx.createLinearGradient(handleX + handleWidth / 2, handleY,
handleX + handleWidth / 2, handleY + handleHeight);
gradient.addColorStop(0, handleRingColorTop);
gradient.addColorStop(1, handleRingColorBottom);
ctx.ellipse(handleX, handleY, handleWidth, handleHeight);
ctx.fillStyle = gradient;
ctx.fill();
}
}
|
