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/**************************************************************************** ** ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). ** Contact: Qt Software Information ([email protected]) ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** Commercial Usage ** Licensees holding valid Qt Commercial licenses may use this file in ** accordance with the Qt Commercial License Agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and Nokia. ** ** 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 1.0, included in the file LGPL_EXCEPTION.txt in this ** package. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 3.0 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 the GNU General Public License version 3.0 requirements will be ** met: http://www.gnu.org/copyleft/gpl.html. ** ** If you are unsure which license is appropriate for your use, please ** contact the sales department at [email protected]. ** $QT_END_LICENSE$ ** ****************************************************************************/ #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); } }
Copyright © 2009 Nokia Corporation and/or its subsidiary(-ies) | Trademarks | Qt 4.5.1 |