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Diffstat (limited to 'demos/embedded/flickable/main.cpp')
| -rw-r--r-- | demos/embedded/flickable/main.cpp | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/demos/embedded/flickable/main.cpp b/demos/embedded/flickable/main.cpp new file mode 100644 index 0000000..cc024d9 --- /dev/null +++ b/demos/embedded/flickable/main.cpp @@ -0,0 +1,233 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the demonstration applications 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 http://qt.nokia.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtCore> +#include <QtGui> + +#include "flickable.h" + +// Returns a list of two-word color names +static QStringList colorPairs(int max) +{ + // capitalize the first letter + QStringList colors = QColor::colorNames(); + colors.removeAll("transparent"); + int num = colors.count(); + for (int c = 0; c < num; ++c) + colors[c] = colors[c][0].toUpper() + colors[c].mid(1); + + // combine two colors, e.g. "lime skyblue" + QStringList combinedColors; + for (int i = 0; i < num; ++i) + for (int j = 0; j < num; ++j) + combinedColors << QString("%1 %2").arg(colors[i]).arg(colors[j]); + + // randomize it + colors.clear(); + while (combinedColors.count()) { + int i = qrand() % combinedColors.count(); + colors << combinedColors[i]; + combinedColors.removeAt(i); + if (colors.count() == max) + break; + } + + return colors; +} + +class ColorList : public QWidget, public Flickable +{ + Q_OBJECT + +public: + ColorList(QWidget *parent = 0) + : QWidget(parent) { + m_offset = 0; + m_height = QFontMetrics(font()).height() + 5; + m_highlight = -1; + m_selected = -1; + + QStringList colors = colorPairs(999); + for (int i = 0; i < colors.count(); ++i) { + QString c = colors[i]; + QString str; + str.sprintf("%4d", i + 1); + m_colorNames << (str + " " + c); + + QStringList duet = c.split(' '); + m_firstColor << duet[0]; + m_secondColor << duet[1]; + } + + setAttribute(Qt::WA_OpaquePaintEvent, true); + setAttribute(Qt::WA_NoSystemBackground, true); + + setMouseTracking(true); + Flickable::setAcceptMouseClick(this); + } + +protected: + // reimplement from Flickable + virtual QPoint scrollOffset() const { + return QPoint(0, m_offset); + } + + // reimplement from Flickable + virtual void setScrollOffset(const QPoint &offset) { + int yy = offset.y(); + if (yy != m_offset) { + m_offset = qBound(0, yy, m_height * m_colorNames.count() - height()); + update(); + } + } + +protected: + void paintEvent(QPaintEvent *event) { + QPainter p(this); + p.fillRect(event->rect(), Qt::white); + int start = m_offset / m_height; + int y = start * m_height - m_offset; + if (m_offset <= 0) { + start = 0; + y = -m_offset; + } + int end = start + height() / m_height + 1; + if (end > m_colorNames.count() - 1) + end = m_colorNames.count() - 1; + for (int i = start; i <= end; ++i, y += m_height) { + + p.setBrush(Qt::NoBrush); + p.setPen(Qt::black); + if (i == m_highlight) { + p.fillRect(0, y, width(), m_height, QColor(0, 64, 128)); + p.setPen(Qt::white); + } + if (i == m_selected) { + p.fillRect(0, y, width(), m_height, QColor(0, 128, 240)); + p.setPen(Qt::white); + } + + p.drawText(m_height + 2, y, width(), m_height, Qt::AlignVCenter, m_colorNames[i]); + + p.setPen(Qt::NoPen); + p.setBrush(m_firstColor[i]); + p.drawRect(1, y + 1, m_height - 2, m_height - 2); + p.setBrush(m_secondColor[i]); + p.drawRect(5, y + 5, m_height - 11, m_height - 11); + } + p.end(); + } + + void keyReleaseEvent(QKeyEvent *event) { + if (event->key() == Qt::Key_Down) { + m_offset += 20; + event->accept(); + update(); + return; + } + if (event->key() == Qt::Key_Up) { + m_offset -= 20; + event->accept(); + update(); + return; + } + } + + void mousePressEvent(QMouseEvent *event) { + Flickable::handleMousePress(event); + if (event->isAccepted()) + return; + + if (event->button() == Qt::LeftButton) { + int y = event->pos().y() + m_offset; + int i = y / m_height; + if (i != m_highlight) { + m_highlight = i; + m_selected = -1; + update(); + } + event->accept(); + } + } + + void mouseMoveEvent(QMouseEvent *event) { + Flickable::handleMouseMove(event); + } + + void mouseReleaseEvent(QMouseEvent *event) { + Flickable::handleMouseRelease(event); + if (event->isAccepted()) + return; + + if (event->button() == Qt::LeftButton) { + m_selected = m_highlight; + event->accept(); + update(); + } + } + +private: + int m_offset; + int m_height; + int m_highlight; + int m_selected; + QStringList m_colorNames; + QList<QColor> m_firstColor; + QList<QColor> m_secondColor; +}; + +#include "main.moc" + +int main(int argc, char *argv[]) +{ + QApplication app(argc, argv); + + ColorList list; + list.setWindowTitle("Kinetic Scrolling"); +#ifdef Q_OS_SYMBIAN + list.showMaximized(); +#else + list.resize(320, 320); + list.show(); +#endif + + return app.exec(); +} |