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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** 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.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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]
}
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