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Diffstat (limited to 'examples/widgets/wiggly/wigglywidget.cpp')
-rw-r--r-- | examples/widgets/wiggly/wigglywidget.cpp | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/examples/widgets/wiggly/wigglywidget.cpp b/examples/widgets/wiggly/wigglywidget.cpp new file mode 100644 index 0000000000..56a026ade7 --- /dev/null +++ b/examples/widgets/wiggly/wigglywidget.cpp @@ -0,0 +1,100 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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] +} |