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Diffstat (limited to 'examples/widgets/wiggly/wigglywidget.cpp')
-rw-r--r-- | examples/widgets/wiggly/wigglywidget.cpp | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/examples/widgets/wiggly/wigglywidget.cpp b/examples/widgets/wiggly/wigglywidget.cpp new file mode 100644 index 0000000..e89fdde --- /dev/null +++ b/examples/widgets/wiggly/wigglywidget.cpp @@ -0,0 +1,101 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 qt-sales@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] +} |