--- a/ginebra2/FlickCharm.cpp Wed Jun 23 17:59:43 2010 +0300
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,409 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
-**
-** This file is part of the Graphics Dojo project on Qt Labs.
-**
-** This file may be used under the terms of the GNU General Public
-** License version 2.0 or 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 GNU
-** General Public Licensing requirements will be met:
-** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
-** 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.
-**
-** 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 <QGraphicsWebView>
-#include <QGraphicsSceneMouseEvent>
-
-#include <QDebug>
-
-struct FlickData {
- typedef enum { Steady, Pressed, ManualScroll, AutoScroll, Stop } State;
- State state;
- QObject *widget;
- QPoint pressPos;
- QPoint offset;
- QPoint dragPos;
- QPoint speed;
- QList<QEvent*> ignored;
-};
-
-class FlickCharmPrivate
-{
-public:
- QHash<QObject*, 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;
- }
-}
-
-void FlickCharm::activateOn(QWebView *webView)
-{
- 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;
- }
-}
-
-void FlickCharm::activateOn(QGraphicsWebView *webView)
-{
- qDebug() << "FlickCharm::activateOn";
- 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;
- }
-}
-
-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(QObject *widget)
-{
- int x = 0, y = 0;
-
- QGraphicsWebView *gWebView = dynamic_cast<QGraphicsWebView*>(widget);
- if (gWebView) {
- QWebFrame *frame = gWebView->page()->mainFrame();
- x = frame->evaluateJavaScript("window.scrollX").toInt();
- y = frame->evaluateJavaScript("window.scrollY").toInt();
- }
-
- 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(QObject *widget, const QPoint &p)
-{
- QGraphicsWebView *gWebView = dynamic_cast<QGraphicsWebView*>(widget);
- if (gWebView) {
- QWebFrame *frame = gWebView->page()->mainFrame();
- if (frame)
- frame->evaluateJavaScript(QString("window.scrollTo(%1,%2);").arg(p.x()).arg(p.y()));
- return;
- }
-
- QAbstractScrollArea *scrollArea = dynamic_cast<QAbstractScrollArea*>(widget);
- if (scrollArea) {
- scrollArea->horizontalScrollBar()->setValue(p.x());
- scrollArea->verticalScrollBar()->setValue(p.y());
- return;
- }
-
- 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)
-{
-// qDebug() << "FlickCharm::eventFilter: " << object << event;
-// if (!object->isWidgetType())
-// return false;
-
- QEvent::Type type = event->type();
- switch (type) {
- case QEvent::MouseButtonPress:
- case QEvent::MouseButtonRelease:
- case QEvent::MouseMove:
- case QEvent::GraphicsSceneMousePress:
- case QEvent::GraphicsSceneMouseRelease:
- case QEvent::GraphicsSceneMouseMove:
- break;
- default:
- return false;
- }
-
- QPoint eventPos;
- QEvent::Type eventType;
- Qt::MouseButtons eventButtons;
- QMouseEvent *mouseEvent = dynamic_cast<QMouseEvent*>(event);
- if (mouseEvent) {
- if (mouseEvent->modifiers() != Qt::NoModifier)
- return false;
- eventPos = mouseEvent->pos();
- eventType = mouseEvent->type();
- eventButtons = mouseEvent->buttons();
- }
- else {
- QGraphicsSceneMouseEvent *mouseEvent = dynamic_cast<QGraphicsSceneMouseEvent*>(event);
- if (mouseEvent && mouseEvent->modifiers() == Qt::NoModifier) {
- eventPos = mouseEvent->pos().toPoint();
- eventType = mouseEvent->type();
- eventButtons = mouseEvent->buttons();
- }
- else
- return false;
- }
-
-// QWidget *viewport = dynamic_cast<QWidget*>(object);
- FlickData *data = d->flickData.value(object);
- if (!data || data->ignored.removeAll(event)) {
- return false;
- }
-
- bool consumed = false;
- switch (data->state) {
-
- case FlickData::Steady:
- if (eventType == QEvent::MouseButtonPress ||
- eventType == QEvent::GraphicsSceneMousePress)
- if (eventButtons == Qt::LeftButton) {
- consumed = true;
- data->state = FlickData::Pressed;
- data->pressPos = eventPos;
- data->offset = scrollOffset(data->widget);
- }
- break;
-
- case FlickData::Pressed:
- if (eventType == 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);
- }
- else if (eventType == QEvent::GraphicsSceneMouseRelease) {
- consumed = true;
- data->state = FlickData::Steady;
-
- QGraphicsSceneMouseEvent *origMouseEvent = static_cast<QGraphicsSceneMouseEvent*>(event);
- QGraphicsSceneMouseEvent *event1 =
- new QGraphicsSceneMouseEvent(QEvent::GraphicsSceneMousePress);
- event1->setPos(origMouseEvent->pos());
- event1->setScenePos(origMouseEvent->scenePos());
- event1->setLastPos(origMouseEvent->lastPos());
- event1->setLastScenePos(origMouseEvent->lastScenePos());
- event1->setButtons(origMouseEvent->buttons());
- event1->setButton(origMouseEvent->button());
- event1->setModifiers(origMouseEvent->modifiers());
-
- QGraphicsSceneMouseEvent *event2 = new QGraphicsSceneMouseEvent(origMouseEvent->type());
- event2->setPos(origMouseEvent->pos());
- event2->setScenePos(origMouseEvent->scenePos());
- event2->setLastPos(origMouseEvent->lastPos());
- event2->setLastScenePos(origMouseEvent->lastScenePos());
- event2->setButtons(origMouseEvent->buttons());
- event2->setButton(origMouseEvent->button());
- event2->setModifiers(origMouseEvent->modifiers());
-
- data->ignored << event1;
- data->ignored << event2;
- QApplication::postEvent(object, event1);
- QApplication::postEvent(object, event2);
- }
- if (eventType == QEvent::MouseMove ||
- eventType == QEvent::GraphicsSceneMouseMove) {
- consumed = true;
- data->state = FlickData::ManualScroll;
- data->dragPos = QCursor::pos();
- if (!d->ticker.isActive())
- d->ticker.start(20, this);
- }
- break;
-
- case FlickData::ManualScroll:
- if (eventType == QEvent::MouseMove ||
- eventType == QEvent::GraphicsSceneMouseMove) {
- consumed = true;
- QPoint delta = eventPos - data->pressPos;
- setScrollOffset(data->widget, data->offset - delta);
- }
- if (eventType == QEvent::MouseButtonRelease ||
- eventType == QEvent::GraphicsSceneMouseRelease) {
- consumed = true;
- data->state = FlickData::AutoScroll;
- }
- break;
-
- case FlickData::AutoScroll:
- if (eventType == QEvent::MouseButtonPress ||
- eventType == QEvent::GraphicsSceneMousePress) {
- consumed = true;
- data->state = FlickData::Stop;
- data->speed = QPoint(0, 0);
- data->pressPos = eventPos;
- data->offset = scrollOffset(data->widget);
- }
- if (eventType == QEvent::MouseButtonRelease ||
- eventType == QEvent::GraphicsSceneMouseRelease) {
- consumed = true;
- data->state = FlickData::Steady;
- data->speed = QPoint(0, 0);
- }
- break;
-
- case FlickData::Stop:
- if (eventType == QEvent::MouseButtonRelease ||
- eventType == QEvent::GraphicsSceneMouseRelease) {
- consumed = true;
- data->state = FlickData::Steady;
- }
- if (eventType == QEvent::MouseMove ||
- eventType == QEvent::GraphicsSceneMouseMove) {
- 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<QObject*, 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);
-}