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
|
/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
#include "wigglywidget.h"
//! [0]
WigglyWidget::WigglyWidget(QWidget *parent)
: QWidget(parent)
{
setBackgroundRole(QPalette::Midlight);
setAutoFillBackground(true);
QFont newFont = font();
newFont.setPointSize(newFont.pointSize() + 20);
setFont(newFont);
step = 0;
timer.start(60, this);
}
//! [0]
//! [1]
void WigglyWidget::paintEvent(QPaintEvent * /* event */)
//! [1] //! [2]
{
static const int sineTable[16] = {
0, 38, 71, 92, 100, 92, 71, 38, 0, -38, -71, -92, -100, -92, -71, -38
};
QFontMetrics metrics(font());
int x = (width() - metrics.width(text)) / 2;
int y = (height() + metrics.ascent() - metrics.descent()) / 2;
QColor color;
//! [2]
//! [3]
QPainter painter(this);
//! [3] //! [4]
for (int i = 0; i < text.size(); ++i) {
int index = (step + i) % 16;
color.setHsv((15 - index) * 16, 255, 191);
painter.setPen(color);
painter.drawText(x, y - ((sineTable[index] * metrics.height()) / 400),
QString(text[i]));
x += metrics.width(text[i]);
}
}
//! [4]
//! [5]
void WigglyWidget::timerEvent(QTimerEvent *event)
//! [5] //! [6]
{
if (event->timerId() == timer.timerId()) {
++step;
update();
} else {
QWidget::timerEvent(event);
}
//! [6]
}
|
