1 /****************************************************************************
3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
4 ** All rights reserved.
5 ** Contact: Nokia Corporation (qt-info@nokia.com)
7 ** This file is part of the demonstration applications of the Qt Toolkit.
9 ** $QT_BEGIN_LICENSE:LGPL$
10 ** No Commercial Usage
11 ** This file contains pre-release code and may not be distributed.
12 ** You may use this file in accordance with the terms and conditions
13 ** contained in the Technology Preview License Agreement accompanying
16 ** GNU Lesser General Public License Usage
17 ** Alternatively, this file may be used under the terms of the GNU Lesser
18 ** General Public License version 2.1 as published by the Free Software
19 ** Foundation and appearing in the file LICENSE.LGPL included in the
20 ** packaging of this file. Please review the following information to
21 ** ensure the GNU Lesser General Public License version 2.1 requirements
22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
24 ** In addition, as a special exception, Nokia gives you certain additional
25 ** rights. These rights are described in the Nokia Qt LGPL Exception
26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
28 ** If you have questions regarding the use of this file, please contact
29 ** Nokia at qt-info@nokia.com.
40 ****************************************************************************/
42 #include "chasewidget.h"
44 #include <QtCore/QPoint>
46 #include <QtGui/QApplication>
47 #include <QtGui/QHideEvent>
48 #include <QtGui/QPainter>
49 #include <QtGui/QPaintEvent>
50 #include <QtGui/QShowEvent>
52 ChaseWidget::ChaseWidget(QWidget
*parent
, QPixmap pixmap
, bool pixmapEnabled
)
60 , m_pixmapEnabled(pixmapEnabled
)
64 void ChaseWidget::setAnimated(bool value
)
66 if (m_animated
== value
)
69 if (m_timerId
!= -1) {
75 m_timerId
= startTimer(m_delay
);
80 void ChaseWidget::paintEvent(QPaintEvent
*event
)
84 if (m_pixmapEnabled
&& !m_pixmap
.isNull()) {
85 p
.drawPixmap(0, 0, m_pixmap
);
89 const int extent
= qMin(width() - 8, height() - 8);
90 const int displ
= extent
/ 4;
91 const int ext
= extent
/ 4 - 1;
93 p
.setRenderHint(QPainter::Antialiasing
, true);
98 p
.setPen(QPen(palette().dark().color()));
100 p
.translate(width() / 2, height() / 2); // center
102 for (int segment
= 0; segment
< segmentCount(); ++segment
) {
103 p
.rotate(QApplication::isRightToLeft() ? m_step
: -m_step
);
105 p
.setBrush(colorForSegment(segment
));
107 p
.setBrush(palette().background());
108 p
.drawEllipse(QRect(displ
, -ext
/ 2, ext
, ext
));
112 QSize
ChaseWidget::sizeHint() const
114 return QSize(32, 32);
117 void ChaseWidget::timerEvent(QTimerEvent
*event
)
119 if (event
->timerId() == m_timerId
) {
123 QWidget::timerEvent(event
);
126 QColor
ChaseWidget::colorForSegment(int seg
) const
128 int index
= ((seg
+ m_segment
) % segmentCount());
129 int comp
= qMax(0, 255 - (index
* (255 / segmentCount())));
130 return QColor(comp
, comp
, comp
, 255);
133 int ChaseWidget::segmentCount() const
138 void ChaseWidget::setPixmapEnabled(bool enable
)
140 m_pixmapEnabled
= enable
;