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
|
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples 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 Technology Preview License Agreement accompanying
** this package.
**
** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef TABLETCANVAS_H
#define TABLETCANVAS_H
#include <QWidget>
#include <QImage>
#include <QPoint>
#include <QTabletEvent>
#include <QColor>
#include <QBrush>
#include <QPen>
#include <QPoint>
QT_BEGIN_NAMESPACE
class QPaintEvent;
class QString;
QT_END_NAMESPACE
//! [0]
class TabletCanvas : public QWidget
{
Q_OBJECT
public:
enum AlphaChannelType { AlphaPressure, AlphaTilt, NoAlpha };
enum ColorSaturationType { SaturationVTilt, SaturationHTilt,
SaturationPressure, NoSaturation };
enum LineWidthType { LineWidthPressure, LineWidthTilt, NoLineWidth };
TabletCanvas();
bool saveImage(const QString &file);
bool loadImage(const QString &file);
void setAlphaChannelType(AlphaChannelType type)
{ alphaChannelType = type; }
void setColorSaturationType(ColorSaturationType type)
{ colorSaturationType = type; }
void setLineWidthType(LineWidthType type)
{ lineWidthType = type; }
void setColor(const QColor &color)
{ myColor = color; }
QColor color() const
{ return myColor; }
void setTabletDevice(QTabletEvent::TabletDevice device)
{ myTabletDevice = device; }
int maximum(int a, int b)
{ return a > b ? a : b; }
protected:
void tabletEvent(QTabletEvent *event);
void paintEvent(QPaintEvent *event);
void resizeEvent(QResizeEvent *event);
private:
void initImage();
void paintImage(QPainter &painter, QTabletEvent *event);
Qt::BrushStyle brushPattern(qreal value);
void updateBrush(QTabletEvent *event);
AlphaChannelType alphaChannelType;
ColorSaturationType colorSaturationType;
LineWidthType lineWidthType;
QTabletEvent::PointerType pointerType;
QTabletEvent::TabletDevice myTabletDevice;
QColor myColor;
QImage image;
QBrush myBrush;
QPen myPen;
bool deviceDown;
QPoint polyLine[3];
};
//! [0]
#endif
|
