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
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
/****************************************************************************
**
** Copyright (C) 2017 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 2.12
/*
A cross-graphics API implementation of QtGraphicalEffects' RectangularGlow.
*/
Item {
id: rootItem
/*
This property defines how many pixels outside the item area are reached
by the glow.
The value ranges from 0.0 (no glow) to inf (infinite glow). By default,
the property is set to \c 0.0.
\table
\header
\li Output examples with different glowRadius values
\li
\li
\row
\li \image RectangularGlow_glowRadius1.png
\li \image RectangularGlow_glowRadius2.png
\li \image RectangularGlow_glowRadius3.png
\row
\li \b { glowRadius: 10 }
\li \b { glowRadius: 20 }
\li \b { glowRadius: 40 }
\row
\li \l spread: 0
\li \l spread: 0
\li \l spread: 0
\row
\li \l color: #ffffff
\li \l color: #ffffff
\li \l color: #ffffff
\row
\li \l cornerRadius: 25
\li \l cornerRadius: 25
\li \l cornerRadius: 25
\endtable
*/
property real glowRadius: 0.0
/*
This property defines how large part of the glow color is strenghtened
near the source edges.
The value ranges from 0.0 (no strenght increase) to 1.0 (maximum
strenght increase). By default, the property is set to \c 0.0.
\table
\header
\li Output examples with different spread values
\li
\li
\row
\li \image RectangularGlow_spread1.png
\li \image RectangularGlow_spread2.png
\li \image RectangularGlow_spread3.png
\row
\li \b { spread: 0.0 }
\li \b { spread: 0.5 }
\li \b { spread: 1.0 }
\row
\li \l glowRadius: 20
\li \l glowRadius: 20
\li \l glowRadius: 20
\row
\li \l color: #ffffff
\li \l color: #ffffff
\li \l color: #ffffff
\row
\li \l cornerRadius: 25
\li \l cornerRadius: 25
\li \l cornerRadius: 25
\endtable
*/
property real spread: 0.0
/*
This property defines the RGBA color value which is used for the glow.
By default, the property is set to \c "white".
\table
\header
\li Output examples with different color values
\li
\li
\row
\li \image RectangularGlow_color1.png
\li \image RectangularGlow_color2.png
\li \image RectangularGlow_color3.png
\row
\li \b { color: #ffffff }
\li \b { color: #55ff55 }
\li \b { color: #5555ff }
\row
\li \l glowRadius: 20
\li \l glowRadius: 20
\li \l glowRadius: 20
\row
\li \l spread: 0
\li \l spread: 0
\li \l spread: 0
\row
\li \l cornerRadius: 25
\li \l cornerRadius: 25
\li \l cornerRadius: 25
\endtable
*/
property color color: "white"
/*
This property defines the corner radius that is used to draw a glow with
rounded corners.
The value ranges from 0.0 to half of the effective width or height of
the glow, whichever is smaller. This can be calculated with: \c{
min(width, height) / 2.0 + glowRadius}
By default, the property is bound to glowRadius property. The glow
behaves as if the rectangle was blurred when adjusting the glowRadius
property.
\table
\header
\li Output examples with different cornerRadius values
\li
\li
\row
\li \image RectangularGlow_cornerRadius1.png
\li \image RectangularGlow_cornerRadius2.png
\li \image RectangularGlow_cornerRadius3.png
\row
\li \b { cornerRadius: 0 }
\li \b { cornerRadius: 25 }
\li \b { cornerRadius: 50 }
\row
\li \l glowRadius: 20
\li \l glowRadius: 20
\li \l glowRadius: 20
\row
\li \l spread: 0
\li \l spread: 0
\li \l spread: 0
\row
\li \l color: #ffffff
\li \l color: #ffffff
\li \l color: #ffffff
\endtable
*/
property real cornerRadius: glowRadius
/*
This property allows the effect output pixels to be cached in order to
improve the rendering performance.
Every time the source or effect properties are changed, the pixels in
the cache must be updated. Memory consumption is increased, because an
extra buffer of memory is required for storing the effect output.
It is recommended to disable the cache when the source or the effect
properties are animated.
By default, the property is set to \c false.
*/
property bool cached: false
ShaderEffectSource {
id: cacheItem
anchors.fill: shaderItem
visible: rootItem.cached
smooth: true
sourceItem: shaderItem
live: true
hideSource: visible
}
ShaderEffect {
id: shaderItem
x: (parent.width - width) / 2.0
y: (parent.height - height) / 2.0
width: parent.width + rootItem.glowRadius * 2 + cornerRadius * 2
height: parent.height + rootItem.glowRadius * 2 + cornerRadius * 2
function clampedCornerRadius() {
var maxCornerRadius = Math.min(rootItem.width, rootItem.height) / 2 + glowRadius;
return Math.max(0, Math.min(rootItem.cornerRadius, maxCornerRadius))
}
property color color: rootItem.color
property real inverseSpread: 1.0 - rootItem.spread
property real relativeSizeX: ((inverseSpread * inverseSpread) * rootItem.glowRadius + cornerRadius * 2.0) / width
property real relativeSizeY: relativeSizeX * (width / height)
property real spread: rootItem.spread / 2.0
property real cornerRadius: clampedCornerRadius()
fragmentShader: "qrc:/qt-project.org/imports/QtQuick/Controls.2/Material/shaders/RectangularGlow.frag"
}
}
|
