diff options
author | Ariya Hidayat <ariya.hidayat@nokia.com> | 2008-11-14 21:11:53 +0000 |
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committer | David Boddie <dboddie@trolltech.com> | 2008-11-14 21:11:53 +0000 |
commit | 50fd7301e4731c55ee95dcb83fbd7fd387d24a16 (patch) | |
tree | 3fa4d9e5c68e963cb1a0f06559758b14c42b34b9 /flickcharm | |
parent | 0bbc0a3fe177aecc0d76d7773dfd73523b6f4b77 (diff) |
Add the Flick Charm.
Diffstat (limited to 'flickcharm')
-rw-r--r-- | flickcharm/flickcharm.cpp | 307 | ||||
-rw-r--r-- | flickcharm/flickcharm.h | 49 | ||||
-rw-r--r-- | flickcharm/flickcharm.pro | 8 | ||||
-rw-r--r-- | flickcharm/main.cpp | 134 |
4 files changed, 498 insertions, 0 deletions
diff --git a/flickcharm/flickcharm.cpp b/flickcharm/flickcharm.cpp new file mode 100644 index 0000000..0aec724 --- /dev/null +++ b/flickcharm/flickcharm.cpp @@ -0,0 +1,307 @@ +/**************************************************************************** +** +** Copyright (C) 2008-2008 Trolltech ASA. All rights reserved. +** +** This file is part of the Graphics Dojo project on Trolltech Labs. +** +** This file may be used under the terms of the GNU General Public +** License version 2.0 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 GNU +** General Public Licensing requirements will be met: +** http://www.trolltech.com/products/qt/opensource.html +** +** If you are unsure which license is appropriate for your use, please +** review the following information: +** http://www.trolltech.com/products/qt/licensing.html or contact the +** sales department at sales@trolltech.com. +** +** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE +** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. +** +****************************************************************************/ + +#include "flickcharm.h" + +#include <QAbstractScrollArea> +#include <QApplication> +#include <QBasicTimer> +#include <QEvent> +#include <QHash> +#include <QList> +#include <QMouseEvent> +#include <QScrollBar> +#include <QWebFrame> +#include <QWebView> + +#include <QDebug> + +struct FlickData { + typedef enum { Steady, Pressed, ManualScroll, AutoScroll, Stop } State; + State state; + QWidget *widget; + QPoint pressPos; + QPoint offset; + QPoint dragPos; + QPoint speed; + QList<QEvent*> ignored; +}; + +class FlickCharmPrivate +{ +public: + QHash<QWidget*, FlickData*> flickData; + QBasicTimer ticker; +}; + +FlickCharm::FlickCharm(QObject *parent): QObject(parent) +{ + d = new FlickCharmPrivate; +} + +FlickCharm::~FlickCharm() +{ + delete d; +} + +void FlickCharm::activateOn(QWidget *widget) +{ + QAbstractScrollArea *scrollArea = dynamic_cast<QAbstractScrollArea*>(widget); + if (scrollArea) { + scrollArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); + scrollArea->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff); + + QWidget *viewport = scrollArea->viewport(); + + viewport->installEventFilter(this); + scrollArea->installEventFilter(this); + + d->flickData.remove(viewport); + d->flickData[viewport] = new FlickData; + d->flickData[viewport]->widget = widget; + d->flickData[viewport]->state = FlickData::Steady; + + return; + } + + QWebView *webView = dynamic_cast<QWebView*>(widget); + if (webView) { + QWebFrame *frame = webView->page()->mainFrame(); + frame->setScrollBarPolicy(Qt::Vertical, Qt::ScrollBarAlwaysOff); + frame->setScrollBarPolicy(Qt::Horizontal, Qt::ScrollBarAlwaysOff); + + webView->installEventFilter(this); + + d->flickData.remove(webView); + d->flickData[webView] = new FlickData; + d->flickData[webView]->widget = webView; + d->flickData[webView]->state = FlickData::Steady; + + return; + } + + qWarning() << "FlickCharm only works on QAbstractScrollArea (and derived classes)"; + qWarning() << "or QWebView (and derived classes)"; +} + +void FlickCharm::deactivateFrom(QWidget *widget) +{ + QAbstractScrollArea *scrollArea = dynamic_cast<QAbstractScrollArea*>(widget); + if (scrollArea) { + QWidget *viewport = scrollArea->viewport(); + + viewport->removeEventFilter(this); + scrollArea->removeEventFilter(this); + + delete d->flickData[viewport]; + d->flickData.remove(viewport); + + return; + } + + QWebView *webView = dynamic_cast<QWebView*>(widget); + if (webView) { + webView->removeEventFilter(this); + + delete d->flickData[webView]; + d->flickData.remove(webView); + + return; + } +} + +static QPoint scrollOffset(QWidget *widget) +{ + int x = 0, y = 0; + + QAbstractScrollArea *scrollArea = dynamic_cast<QAbstractScrollArea*>(widget); + if (scrollArea) { + x = scrollArea->horizontalScrollBar()->value(); + y = scrollArea->verticalScrollBar()->value(); + } + + QWebView *webView = dynamic_cast<QWebView*>(widget); + if (webView) { + QWebFrame *frame = webView->page()->mainFrame(); + x = frame->evaluateJavaScript("window.scrollX").toInt(); + y = frame->evaluateJavaScript("window.scrollY").toInt(); + } + + return QPoint(x, y); +} + +static void setScrollOffset(QWidget *widget, const QPoint &p) +{ + QAbstractScrollArea *scrollArea = dynamic_cast<QAbstractScrollArea*>(widget); + if (scrollArea) { + scrollArea->horizontalScrollBar()->setValue(p.x()); + scrollArea->verticalScrollBar()->setValue(p.y()); + } + + QWebView *webView = dynamic_cast<QWebView*>(widget); + QWebFrame *frame = webView ? webView->page()->mainFrame() : 0; + if (frame) + frame->evaluateJavaScript(QString("window.scrollTo(%1,%2);").arg(p.x()).arg(p.y())); +} + +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); +} + +bool FlickCharm::eventFilter(QObject *object, QEvent *event) +{ + if (!object->isWidgetType()) + return false; + + QEvent::Type type = event->type(); + if (type != QEvent::MouseButtonPress && + type != QEvent::MouseButtonRelease && + type != QEvent::MouseMove) + return false; + + QMouseEvent *mouseEvent = dynamic_cast<QMouseEvent*>(event); + if (!mouseEvent || mouseEvent->modifiers() != Qt::NoModifier) + return false; + + QWidget *viewport = dynamic_cast<QWidget*>(object); + FlickData *data = d->flickData.value(viewport); + if (!viewport || !data || data->ignored.removeAll(event)) + return false; + + bool consumed = false; + switch (data->state) { + + case FlickData::Steady: + if (mouseEvent->type() == QEvent::MouseButtonPress) + if (mouseEvent->buttons() == Qt::LeftButton) { + consumed = true; + data->state = FlickData::Pressed; + data->pressPos = mouseEvent->pos(); + data->offset = scrollOffset(data->widget); + } + break; + + case FlickData::Pressed: + if (mouseEvent->type() == QEvent::MouseButtonRelease) { + consumed = true; + data->state = FlickData::Steady; + + QMouseEvent *event1 = new QMouseEvent(QEvent::MouseButtonPress, + data->pressPos, Qt::LeftButton, + Qt::LeftButton, Qt::NoModifier); + QMouseEvent *event2 = new QMouseEvent(*mouseEvent); + + data->ignored << event1; + data->ignored << event2; + QApplication::postEvent(object, event1); + QApplication::postEvent(object, event2); + } + if (mouseEvent->type() == QEvent::MouseMove) { + consumed = true; + data->state = FlickData::ManualScroll; + data->dragPos = QCursor::pos(); + if (!d->ticker.isActive()) + d->ticker.start(20, this); + } + break; + + case FlickData::ManualScroll: + if (mouseEvent->type() == QEvent::MouseMove) { + consumed = true; + QPoint delta = mouseEvent->pos() - data->pressPos; + setScrollOffset(data->widget, data->offset - delta); + } + if (mouseEvent->type() == QEvent::MouseButtonRelease) { + consumed = true; + data->state = FlickData::AutoScroll; + } + break; + + case FlickData::AutoScroll: + if (mouseEvent->type() == QEvent::MouseButtonPress) { + consumed = true; + data->state = FlickData::Stop; + data->speed = QPoint(0, 0); + } + if (mouseEvent->type() == QEvent::MouseButtonRelease) { + consumed = true; + data->state = FlickData::Steady; + data->speed = QPoint(0, 0); + } + break; + + case FlickData::Stop: + if (mouseEvent->type() == QEvent::MouseButtonRelease) { + consumed = true; + data->state = FlickData::Steady; + } + if (mouseEvent->type() == QEvent::MouseMove) { + consumed = true; + data->state = FlickData::ManualScroll; + data->dragPos = QCursor::pos(); + if (!d->ticker.isActive()) + d->ticker.start(20, this); + } + break; + + default: + break; + } + + return consumed; +} + +void FlickCharm::timerEvent(QTimerEvent *event) +{ + int count = 0; + QHashIterator<QWidget*, FlickData*> item(d->flickData); + while (item.hasNext()) { + item.next(); + FlickData *data = item.value(); + + if (data->state == FlickData::ManualScroll) { + count++; + data->speed = QCursor::pos() - data->dragPos; + data->dragPos = QCursor::pos(); + } + + if (data->state == FlickData::AutoScroll) { + count++; + data->speed = deaccelerate(data->speed); + QPoint p = scrollOffset(data->widget); + setScrollOffset(data->widget, p - data->speed); + if (data->speed == QPoint(0, 0)) + data->state = FlickData::Steady; + } + } + + if (!count) + d->ticker.stop(); + + QObject::timerEvent(event); +} diff --git a/flickcharm/flickcharm.h b/flickcharm/flickcharm.h new file mode 100644 index 0000000..72ee207 --- /dev/null +++ b/flickcharm/flickcharm.h @@ -0,0 +1,49 @@ +/**************************************************************************** +** +** Copyright (C) 2008-2008 Trolltech ASA. All rights reserved. +** +** This file is part of the Graphics Dojo project on Trolltech Labs. +** +** This file may be used under the terms of the GNU General Public +** License version 2.0 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 GNU +** General Public Licensing requirements will be met: +** http://www.trolltech.com/products/qt/opensource.html +** +** If you are unsure which license is appropriate for your use, please +** review the following information: +** http://www.trolltech.com/products/qt/licensing.html or contact the +** sales department at sales@trolltech.com. +** +** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE +** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. +** +****************************************************************************/ + +#ifndef FLICKCHARM_H +#define FLICKCHARM_H + +#include <QObject> + +class FlickCharmPrivate; +class QWidget; + +class FlickCharm: public QObject +{ + Q_OBJECT +public: + FlickCharm(QObject *parent = 0); + ~FlickCharm(); + void activateOn(QWidget *widget); + void deactivateFrom(QWidget *widget); + bool eventFilter(QObject *object, QEvent *event); + +protected: + void timerEvent(QTimerEvent *event); + +private: + FlickCharmPrivate *d; +}; + +#endif // FLICKCHARM_H diff --git a/flickcharm/flickcharm.pro b/flickcharm/flickcharm.pro new file mode 100644 index 0000000..5b2cbba --- /dev/null +++ b/flickcharm/flickcharm.pro @@ -0,0 +1,8 @@ +TEMPLATE = app +TARGET = flickcharm +SOURCES = flickcharm.cpp main.cpp +HEADERS = flickcharm.h +CONFIG += console +CONFIG -= debug +CONFIG += release +QT += network webkit diff --git a/flickcharm/main.cpp b/flickcharm/main.cpp new file mode 100644 index 0000000..a49c6d6 --- /dev/null +++ b/flickcharm/main.cpp @@ -0,0 +1,134 @@ +/**************************************************************************** +** +** Copyright (C) 2008-2008 Trolltech ASA. All rights reserved. +** +** This file is part of the Graphics Dojo project on Trolltech Labs. +** +** This file may be used under the terms of the GNU General Public +** License version 2.0 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 GNU +** General Public Licensing requirements will be met: +** http://www.trolltech.com/products/qt/opensource.html +** +** If you are unsure which license is appropriate for your use, please +** review the following information: +** http://www.trolltech.com/products/qt/licensing.html or contact the +** sales department at sales@trolltech.com. +** +** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE +** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. +** +****************************************************************************/ + +#include <QtGui> +#include <QtWebKit> + +#include "flickcharm.h" + +#define ITEM_WIDTH 300 +#define ITEM_HEIGHT 30 + +class TextItem: public QGraphicsItem +{ +public: + TextItem(const QString &str) { + QStringList list = str.split(' '); + str1 = list[0]; + str2 = list[1]; + font1 = QFont("Arial"); + font2 = QFont("Arial"); + font1.setBold(true); + font1.setPixelSize(ITEM_HEIGHT / 2); + font2.setPixelSize(ITEM_HEIGHT / 2); + offset = QFontMetrics(font1).width(str1) + 15; + } + + QRectF boundingRect() const { + return QRectF(0, 0, ITEM_WIDTH, ITEM_HEIGHT); + } + + void paint(QPainter *painter, const QStyleOptionGraphicsItem* option, QWidget*) { + if (option->state & QStyle::State_Selected) { + painter->fillRect(boundingRect(), QColor(0, 128, 240)); + painter->setPen(Qt::white); + } else { + painter->setPen(Qt::lightGray); + painter->drawRect(boundingRect()); + painter->setPen(Qt::black); + } + painter->setFont(font1); + painter->drawText(QRect(10, 0, offset, ITEM_HEIGHT), Qt::AlignVCenter, str1); + painter->setFont(font2); + painter->drawText(QRect(offset, 0, ITEM_WIDTH, ITEM_HEIGHT), Qt::AlignVCenter, str2); + } + +private: + QFont font1; + QFont font2; + QString str1; + QString str2; + int offset; +}; + +// Returns a list of two-word color names +static QStringList colorPairs(int max) +{ + // capitalize the first letter + QStringList colors = QColor::colorNames(); + 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; +} + +int main(int argc, char *argv[]) +{ + QApplication app(argc, argv); + + QStringList colors = colorPairs(5000); + QGraphicsScene scene; + scene.setItemIndexMethod(QGraphicsScene::NoIndex); + for (int i = 0; i < colors.count(); ++i) { + TextItem *item = new TextItem(colors[i]); + scene.addItem(item); + item->setPos(0, i*ITEM_HEIGHT); + item->setFlag(QGraphicsItem::ItemIsSelectable, true); + } + scene.setItemIndexMethod(QGraphicsScene::BspTreeIndex); + + QGraphicsView canvas; + canvas.setScene(&scene); + canvas.setRenderHints(QPainter::TextAntialiasing); + canvas.setFrameShape(QFrame::NoFrame); + canvas.setWindowTitle("Flickable Canvas"); + canvas.show(); + + QWebView web; + web.setUrl(QUrl("http://news.google.com")); + web.setWindowTitle("Flickable Web View"); + web.show(); + + FlickCharm FlickCharm; + FlickCharm.activateOn(&canvas); + FlickCharm.activateOn(&web); + + return app.exec(); +} |