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<td align="right" valign="top" width="230"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></td></tr></table><h1 align="center">wigglywidget.cpp Example File<br /><small><small>widgets/wiggly/wigglywidget.cpp</small></small></h1>

<pre>  /****************************************************************************

** This file is part of the documentation of the Qt Toolkit.

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** as defined by Trolltech AS of Norway and appearing in the file

** LICENSE.QPL included in the packaging of this file.

** This file may be distributed and/or modified under the terms of the

** GNU General Public License version 2 as published by the Free Software

** Foundation and appearing in the file LICENSE.GPL included in the

** packaging of this file.

** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for

** information about Qt Commercial License Agreements.

** See http://www.trolltech.com/qpl/ for QPL licensing information.

** See http://www.trolltech.com/gpl/ for GPL licensing information.

** Contact info@trolltech.com if any conditions of this licensing are

** not clear to you.

** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE

** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

****************************************************************************/

#include <QtGui>

#include "wigglywidget.h"

WigglyWidget::WigglyWidget(QWidget *parent)

: QWidget(parent)

{

setBackgroundRole(QPalette::Midlight);

QFont newFont = font();

newFont.setPointSize(newFont.pointSize() + 20);

setFont(newFont);

step = 0;

timer.start(60, this);

}

void WigglyWidget::paintEvent(QPaintEvent * /* event */)

{

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;

QPainter painter(this);

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]);

}

void WigglyWidget::timerEvent(QTimerEvent *event)

{

if (event->timerId() == timer.timerId()) {

++step;

update();

} else {

QWidget::timerEvent(event);

}

}</pre>

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