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
|
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** 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, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 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 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef GRADIENTS_H
#define GRADIENTS_H
#include "arthurwidgets.h"
#include <QtGui>
class HoverPoints;
class ShadeWidget : public QWidget
{
Q_OBJECT
public:
enum ShadeType {
RedShade,
GreenShade,
BlueShade,
ARGBShade
};
ShadeWidget(ShadeType type, QWidget *parent);
void setGradientStops(const QGradientStops &stops);
void paintEvent(QPaintEvent *e);
QSize sizeHint() const { return QSize(150, 40); }
QPolygonF points() const;
HoverPoints *hoverPoints() const { return m_hoverPoints; }
uint colorAt(int x);
signals:
void colorsChanged();
private:
void generateShade();
ShadeType m_shade_type;
QImage m_shade;
HoverPoints *m_hoverPoints;
QLinearGradient m_alpha_gradient;
};
class GradientEditor : public QWidget
{
Q_OBJECT
public:
GradientEditor(QWidget *parent);
void setGradientStops(const QGradientStops &stops);
public slots:
void pointsUpdated();
signals:
void gradientStopsChanged(const QGradientStops &stops);
private:
ShadeWidget *m_red_shade;
ShadeWidget *m_green_shade;
ShadeWidget *m_blue_shade;
ShadeWidget *m_alpha_shade;
};
class GradientRenderer : public ArthurFrame
{
Q_OBJECT
public:
GradientRenderer(QWidget *parent);
void paint(QPainter *p);
QSize sizeHint() const { return QSize(400, 400); }
HoverPoints *hoverPoints() const { return m_hoverPoints; }
void mousePressEvent(QMouseEvent *e);
public slots:
void setGradientStops(const QGradientStops &stops);
void setPadSpread() { m_spread = QGradient::PadSpread; update(); }
void setRepeatSpread() { m_spread = QGradient::RepeatSpread; update(); }
void setReflectSpread() { m_spread = QGradient::ReflectSpread; update(); }
void setLinearGradient() { m_gradientType = Qt::LinearGradientPattern; update(); }
void setRadialGradient() { m_gradientType = Qt::RadialGradientPattern; update(); }
void setConicalGradient() { m_gradientType = Qt::ConicalGradientPattern; update(); }
private:
QGradientStops m_stops;
HoverPoints *m_hoverPoints;
QGradient::Spread m_spread;
Qt::BrushStyle m_gradientType;
};
class GradientWidget : public QWidget
{
Q_OBJECT
public:
GradientWidget(QWidget *parent);
public slots:
void setDefault1() { setDefault(1); }
void setDefault2() { setDefault(2); }
void setDefault3() { setDefault(3); }
void setDefault4() { setDefault(4); }
private:
void setDefault(int i);
GradientRenderer *m_renderer;
GradientEditor *m_editor;
QRadioButton *m_linearButton;
QRadioButton *m_radialButton;
QRadioButton *m_conicalButton;
QRadioButton *m_padSpreadButton;
QRadioButton *m_reflectSpreadButton;
QRadioButton *m_repeatSpreadButton;
};
#endif // GRADIENTS_H
|
