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-rw-r--r--demos/embedded/flickable/flickable.cpp284
-rw-r--r--demos/embedded/flickable/flickable.h80
-rw-r--r--demos/embedded/flickable/flickable.pro2
-rw-r--r--demos/embedded/flickable/main.cpp233
4 files changed, 599 insertions, 0 deletions
diff --git a/demos/embedded/flickable/flickable.cpp b/demos/embedded/flickable/flickable.cpp
new file mode 100644
index 0000000..8fbefe6
--- /dev/null
+++ b/demos/embedded/flickable/flickable.cpp
@@ -0,0 +1,284 @@
+/****************************************************************************
+**
+** 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 "flickable.h"
+
+#include <QtCore>
+#include <QtGui>
+
+class FlickableTicker: QObject
+{
+public:
+ FlickableTicker(Flickable *scroller) {
+ m_scroller = scroller;
+ }
+
+ void start(int interval) {
+ if (!m_timer.isActive())
+ m_timer.start(interval, this);
+ }
+
+ void stop() {
+ m_timer.stop();
+ }
+
+protected:
+ void timerEvent(QTimerEvent *event) {
+ Q_UNUSED(event);
+ m_scroller->tick();
+ }
+
+private:
+ Flickable *m_scroller;
+ QBasicTimer m_timer;
+};
+
+class FlickablePrivate
+{
+public:
+ typedef enum {
+ Steady,
+ Pressed,
+ ManualScroll,
+ AutoScroll,
+ Stop
+ } State;
+
+ State state;
+ int threshold;
+ QPoint pressPos;
+ QPoint offset;
+ QPoint delta;
+ QPoint speed;
+ FlickableTicker *ticker;
+ QTime timeStamp;
+ QWidget *target;
+ QList<QEvent*> ignoreList;
+};
+
+Flickable::Flickable()
+{
+ d = new FlickablePrivate;
+ d->state = FlickablePrivate::Steady;
+ d->threshold = 10;
+ d->ticker = new FlickableTicker(this);
+ d->timeStamp = QTime::currentTime();
+ d->target = 0;
+}
+
+Flickable::~Flickable()
+{
+ delete d;
+}
+
+void Flickable::setThreshold(int th)
+{
+ if (th >= 0)
+ d->threshold = th;
+}
+
+int Flickable::threshold() const
+{
+ return d->threshold;
+}
+
+void Flickable::setAcceptMouseClick(QWidget *target)
+{
+ d->target = target;
+}
+
+static QPoint deaccelerate(const QPoint &speed, int a = 1, int max = 64)
+{
+ int x = qBound(-max, speed.x(), max);
+ int y = qBound(-max, speed.y(), max);
+ x = (x == 0) ? x : (x > 0) ? qMax(0, x - a) : qMin(0, x + a);
+ y = (y == 0) ? y : (y > 0) ? qMax(0, y - a) : qMin(0, y + a);
+ return QPoint(x, y);
+}
+
+void Flickable::handleMousePress(QMouseEvent *event)
+{
+ event->ignore();
+
+ if (event->button() != Qt::LeftButton)
+ return;
+
+ if (d->ignoreList.removeAll(event))
+ return;
+
+ switch (d->state) {
+
+ case FlickablePrivate::Steady:
+ event->accept();
+ d->state = FlickablePrivate::Pressed;
+ d->pressPos = event->pos();
+ break;
+
+ case FlickablePrivate::AutoScroll:
+ event->accept();
+ d->state = FlickablePrivate::Stop;
+ d->speed = QPoint(0, 0);
+ d->pressPos = event->pos();
+ d->offset = scrollOffset();
+ d->ticker->stop();
+ break;
+
+ default:
+ break;
+ }
+}
+
+void Flickable::handleMouseRelease(QMouseEvent *event)
+{
+ event->ignore();
+
+ if (event->button() != Qt::LeftButton)
+ return;
+
+ if (d->ignoreList.removeAll(event))
+ return;
+
+ QPoint delta;
+
+ switch (d->state) {
+
+ case FlickablePrivate::Pressed:
+ event->accept();
+ d->state = FlickablePrivate::Steady;
+ if (d->target) {
+ QMouseEvent *event1 = new QMouseEvent(QEvent::MouseButtonPress,
+ d->pressPos, Qt::LeftButton,
+ Qt::LeftButton, Qt::NoModifier);
+ QMouseEvent *event2 = new QMouseEvent(*event);
+ d->ignoreList << event1;
+ d->ignoreList << event2;
+ QApplication::postEvent(d->target, event1);
+ QApplication::postEvent(d->target, event2);
+ }
+ break;
+
+ case FlickablePrivate::ManualScroll:
+ event->accept();
+ delta = event->pos() - d->pressPos;
+ if (d->timeStamp.elapsed() > 100) {
+ d->timeStamp = QTime::currentTime();
+ d->speed = delta - d->delta;
+ d->delta = delta;
+ }
+ d->offset = scrollOffset();
+ d->pressPos = event->pos();
+ if (d->speed == QPoint(0, 0)) {
+ d->state = FlickablePrivate::Steady;
+ } else {
+ d->speed /= 4;
+ d->state = FlickablePrivate::AutoScroll;
+ d->ticker->start(20);
+ }
+ break;
+
+ case FlickablePrivate::Stop:
+ event->accept();
+ d->state = FlickablePrivate::Steady;
+ d->offset = scrollOffset();
+ break;
+
+ default:
+ break;
+ }
+}
+
+void Flickable::handleMouseMove(QMouseEvent *event)
+{
+ event->ignore();
+
+ if (!(event->buttons() & Qt::LeftButton))
+ return;
+
+ if (d->ignoreList.removeAll(event))
+ return;
+
+ QPoint delta;
+
+ switch (d->state) {
+
+ case FlickablePrivate::Pressed:
+ case FlickablePrivate::Stop:
+ delta = event->pos() - d->pressPos;
+ if (delta.x() > d->threshold || delta.x() < -d->threshold ||
+ delta.y() > d->threshold || delta.y() < -d->threshold) {
+ d->timeStamp = QTime::currentTime();
+ d->state = FlickablePrivate::ManualScroll;
+ d->delta = QPoint(0, 0);
+ d->pressPos = event->pos();
+ event->accept();
+ }
+ break;
+
+ case FlickablePrivate::ManualScroll:
+ event->accept();
+ delta = event->pos() - d->pressPos;
+ setScrollOffset(d->offset - delta);
+ if (d->timeStamp.elapsed() > 100) {
+ d->timeStamp = QTime::currentTime();
+ d->speed = delta - d->delta;
+ d->delta = delta;
+ }
+ break;
+
+ default:
+ break;
+ }
+}
+
+void Flickable::tick()
+{
+ if (d->state == FlickablePrivate:: AutoScroll) {
+ d->speed = deaccelerate(d->speed);
+ setScrollOffset(d->offset - d->speed);
+ d->offset = scrollOffset();
+ if (d->speed == QPoint(0, 0)) {
+ d->state = FlickablePrivate::Steady;
+ d->ticker->stop();
+ }
+ } else {
+ d->ticker->stop();
+ }
+}
diff --git a/demos/embedded/flickable/flickable.h b/demos/embedded/flickable/flickable.h
new file mode 100644
index 0000000..26497db
--- /dev/null
+++ b/demos/embedded/flickable/flickable.h
@@ -0,0 +1,80 @@
+/****************************************************************************
+**
+** 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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef FLICKABLE_H
+#define FLICKABLE_H
+
+class QMouseEvent;
+class QPoint;
+class QWidget;
+
+class FlickableTicker;
+class FlickablePrivate;
+
+class Flickable
+{
+public:
+
+ Flickable();
+ virtual ~Flickable();
+
+ void setThreshold(int threshold);
+ int threshold() const;
+
+ void setAcceptMouseClick(QWidget *target);
+
+ void handleMousePress(QMouseEvent *event);
+ void handleMouseMove(QMouseEvent *event);
+ void handleMouseRelease(QMouseEvent *event);
+
+protected:
+ virtual QPoint scrollOffset() const = 0;
+ virtual void setScrollOffset(const QPoint &offset) = 0;
+
+private:
+ void tick();
+
+private:
+ FlickablePrivate *d;
+ friend class FlickableTicker;
+};
+
+#endif // FLICKABLE_H
diff --git a/demos/embedded/flickable/flickable.pro b/demos/embedded/flickable/flickable.pro
new file mode 100644
index 0000000..3c021dd
--- /dev/null
+++ b/demos/embedded/flickable/flickable.pro
@@ -0,0 +1,2 @@
+SOURCES = flickable.cpp main.cpp
+HEADERS = flickable.h
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();
+}
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