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/**************************************************************************** ** ** Copyright (C) 2004-2007 Trolltech ASA. All rights reserved. ** ** This file is part of the example classes of the Qt Toolkit. ** ** This file may be used under the terms of the GNU General Public ** License version 2.0 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 GNU ** General Public Licensing requirements will be met: ** http://trolltech.com/products/qt/licenses/licensing/opensource/ ** ** If you are unsure which license is appropriate for your use, please ** review the following information: ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview ** or contact the sales department at sales@trolltech.com. ** ** In addition, as a special exception, Trolltech gives you certain ** additional rights. These rights are described in the Trolltech GPL ** Exception version 1.0, which can be found at ** http://www.trolltech.com/products/qt/gplexception/ and in the file ** GPL_EXCEPTION.txt in this package. ** ** In addition, as a special exception, Trolltech, as the sole copyright ** holder for Qt Designer, grants users of the Qt/Eclipse Integration ** plug-in the right for the Qt/Eclipse Integration to link to ** functionality provided by Qt Designer and its related libraries. ** ** Trolltech reserves all rights not expressly granted herein. ** ** 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); setAutoFillBackground(true); 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); } }
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