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
|
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (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 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.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
#include "pixeldelegate.h"
//! [0]
PixelDelegate::PixelDelegate(QObject *parent)
: QAbstractItemDelegate(parent)
{
pixelSize = 12;
}
//! [0]
//! [1]
void PixelDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
//! [2]
if (option.state & QStyle::State_Selected)
painter->fillRect(option.rect, option.palette.highlight());
//! [1]
//! [3]
int size = qMin(option.rect.width(), option.rect.height());
//! [3] //! [4]
int brightness = index.model()->data(index, Qt::DisplayRole).toInt();
double radius = (size/2.0) - (brightness/255.0 * size/2.0);
if (radius == 0.0)
return;
//! [4]
//! [5]
painter->save();
//! [5] //! [6]
painter->setRenderHint(QPainter::Antialiasing, true);
//! [6] //! [7]
painter->setPen(Qt::NoPen);
//! [7] //! [8]
if (option.state & QStyle::State_Selected)
//! [8] //! [9]
painter->setBrush(option.palette.highlightedText());
else
//! [2]
painter->setBrush(QBrush(Qt::black));
//! [9]
//! [10]
painter->drawEllipse(QRectF(option.rect.x() + option.rect.width()/2 - radius,
option.rect.y() + option.rect.height()/2 - radius,
2*radius, 2*radius));
painter->restore();
}
//! [10]
//! [11]
QSize PixelDelegate::sizeHint(const QStyleOptionViewItem & /* option */,
const QModelIndex & /* index */) const
{
return QSize(pixelSize, pixelSize);
}
//! [11]
//! [12]
void PixelDelegate::setPixelSize(int size)
{
pixelSize = size;
}
//! [12]
|
