forgot to add the webview scroller

2 files changed, 401 insertions, 0 deletions

diff --git a/testapp/qwebviewkineticscroller.cpp b/testapp/qwebviewkineticscroller.cpp
new file mode 100644
index 0000000..3d3790b
--- /dev/null
+++ b/testapp/qwebviewkineticscroller.cpp
@@ -0,0 +1,312 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <qwebviewkineticscroller.h>
+#include <QApplication>
+#include <QGraphicsView>
+#include <QWebView>
+#include <QWebFrame>
+#include <QScrollBar>
+#include <QPointF>
+#include <QPointer>
+#include <QMouseEvent>
+#include <QTouchEvent>
+#if QT_VERSION < 0x040700
+#  include <QTime>
+#else
+#  include <QElapsedTimer>
+#endif
+
+#include <QtDebug>
+
+QT_BEGIN_NAMESPACE
+
+bool qt_sendSpontaneousEvent(QObject *receiver, QEvent *event);
+
+class QWebViewKineticScrollerPrivate
+{
+public:
+    QWebViewKineticScroller *q_ptr;
+
+    QWebView *web;
+    bool ignoreEvents;
+    bool touchActive;
+    bool pressed;
+    QPointF fractionalPosition;
+    QPointer<QWebFrame> scrollFrame;
+    Qt::ScrollBarPolicy oldHorizontalSBP;
+    Qt::ScrollBarPolicy oldVerticalSBP;
+
+#if QT_VERSION < 0x040700
+    QTime timer;
+#else
+    QElapsedTimer timer;
+#endif
+
+    QWebViewKineticScrollerPrivate()
+        : q_ptr(0)
+        , web(0)
+        , ignoreEvents(false)
+        , touchActive(false)
+        , pressed(false)
+    {}
+
+    void init()
+    {
+        timer.start();
+    }
+
+    void sendEvent(QWidget *w, QEvent *e)
+    {
+        ignoreEvents = true;
+        qt_sendSpontaneousEvent(w, e);
+        ignoreEvents = false;
+    }
+
+    QWebFrame *currentFrame() const;
+    QWebFrame *scrollingFrameAt(const QPointF &pos) const;
+};
+
+/*!
+ * The QWebViewKineticScroller class implements the QKineticScroller for the QWebView
+ */
+QWebViewKineticScroller::QWebViewKineticScroller()
+    : QObject()
+    , QKineticScroller()
+    , d_ptr(new QWebViewKineticScrollerPrivate())
+{
+    Q_D(QWebViewKineticScroller);
+    d->q_ptr = this;
+    d->init();
+}
+
+/*!
+    Destroys the scroller.
+*/
+QWebViewKineticScroller::~QWebViewKineticScroller()
+{ }
+
+void QWebViewKineticScroller::setWidget(QWebView *widget)
+{
+    Q_D(QWebViewKineticScroller);
+
+    if (d->web) {
+        d->web->removeEventFilter(this);
+        d->web->setAttribute(Qt::WA_AcceptTouchEvents, false);
+
+        QWebFrame *mainFrame = d->web->page()->mainFrame();
+        mainFrame->setScrollBarPolicy(Qt::Vertical, d->oldVerticalSBP);
+        mainFrame->setScrollBarPolicy(Qt::Horizontal, d->oldHorizontalSBP);
+    }
+
+    d->scrollFrame = 0;
+    reset();
+    d->web = widget;
+    d->fractionalPosition = QPointF();
+    setParent(d->web);
+
+    if (d->web) {
+        QWebFrame *mainFrame = d->web->page()->mainFrame();
+        d->oldVerticalSBP = mainFrame->scrollBarPolicy(Qt::Vertical);
+        d->oldHorizontalSBP = mainFrame->scrollBarPolicy(Qt::Horizontal);
+        mainFrame->setScrollBarPolicy(Qt::Vertical, Qt::ScrollBarAlwaysOff);
+        mainFrame->setScrollBarPolicy(Qt::Horizontal, Qt::ScrollBarAlwaysOff);
+        d->web->setAttribute(Qt::WA_AcceptTouchEvents, true);
+        d->web->installEventFilter(this);
+    }
+}
+
+bool QWebViewKineticScroller::eventFilter(QObject *o, QEvent *e)
+{
+    Q_D(QWebViewKineticScroller);
+
+    qint64 timestamp = d->timer.elapsed();
+    bool res = false;
+
+    if (d->web && (o == d->web) && !d->ignoreEvents && d->web->isEnabled() && isEnabled()) {
+        switch (e->type()) {
+        case QEvent::TouchBegin:
+        case QEvent::TouchUpdate:
+        case QEvent::TouchEnd: {
+                qWarning("TOUCH%s", e->type() == QEvent::TouchBegin ? "BEGIN" : (e->type() == QEvent::TouchEnd ? "END" : "UPDATE"));
+            Input type = (e->type() == QEvent::TouchBegin) ? InputPress :
+                        ((e->type() == QEvent::TouchEnd) ? InputRelease : InputMove);
+            QTouchEvent *te = static_cast<QTouchEvent *>(e);
+            int idx = (te->deviceType() == QTouchEvent::TouchScreen) ? 0 : 1;
+
+            if (te->touchPoints().count() == (idx + 1)) {
+                QPointF p = te->touchPoints().at(idx).pos();
+                if (type == InputPress) {
+                    // remember the frame where the button was pressed
+                    QWebFrame *hitFrame = d->scrollingFrameAt(p);
+                    if (hitFrame)
+                        d->scrollFrame = hitFrame;
+                }
+
+                res = handleInput(type, p, timestamp);
+                if (type == InputPress) {
+                    d->touchActive = true;
+                    res = true; // we need to swallow this event, since WebKit would reject it otherwise
+                } else if (type == InputRelease) {
+                    d->touchActive = false;
+                }
+                qWarning("   TOUCH%s (%d): %d", type == InputPress ? "BEGIN" : (type == InputRelease ? "END" : "UPDATE"), d->touchActive, res);
+            }
+            break;
+        }
+        case QEvent::Wheel:
+            // the two-finger gesture on the Mac is mapped to wheel events by default
+            qWarning("WHEEL");
+            res = d->touchActive;
+            break;
+
+        case QEvent::MouseButtonPress:
+            // re-install the event filter so that we get the mouse release before all other filters.
+            // this is an evil hack, but hard to work around without prioritized event filters.
+            d->web->removeEventFilter(this);
+            d->web->installEventFilter(this);            
+            // fall through
+
+        case QEvent::MouseButtonDblClick:
+        case QEvent::MouseMove:
+        case QEvent::MouseButtonRelease:
+            if (!d->touchActive) {
+                Input type = (e->type() == QEvent::MouseButtonRelease) ? InputRelease :
+                            ((e->type() == QEvent::MouseMove) ? InputMove : InputPress);
+                QPointF p = static_cast<QMouseEvent *>(e)->posF();
+                
+                if (type == InputPress) {
+                    // remember the frame where the button was pressed
+                    QWebFrame *hitFrame = d->scrollingFrameAt(p);
+                    if (hitFrame)
+                        d->scrollFrame = hitFrame;
+                    d->pressed = true;
+                } else if (type == InputRelease) {
+                    d->pressed = false;
+                }
+
+                if (type != InputMove || d->pressed)
+                    res = handleInput(type, p, timestamp);
+            }
+            break;
+
+        default:
+            break;
+        }
+    }
+
+    if (res)
+        e->accept();
+    return res;
+}
+
+
+bool QWebViewKineticScroller::canStartScrollingAt(const QPointF & /*pos*/) const
+{
+    return true;
+}
+
+void QWebViewKineticScroller::cancelPress(const QPointF & /*pressPos*/)
+{
+}
+
+QWebFrame *QWebViewKineticScrollerPrivate::currentFrame() const
+{
+    if (web && scrollFrame)
+        return scrollFrame;
+    else if (web)
+        return web->page()->mainFrame();
+    else
+        return 0;
+}
+
+// returns the innermost frame at the given position that can be scrolled
+QWebFrame *QWebViewKineticScrollerPrivate::scrollingFrameAt(const QPointF &pos) const
+{
+    QWebFrame *hitFrame = 0;
+    if (web) {
+        QWebFrame *mainFrame = web->page()->mainFrame();
+        hitFrame = mainFrame->hitTestContent(pos.toPoint()).frame();
+        QSize range = hitFrame->contentsSize() - hitFrame->geometry().size();
+        
+        while (hitFrame && range.width() <= 1 && range.height() <= 1)
+            hitFrame = hitFrame->parentFrame();
+    }
+    return hitFrame;
+}
+
+QSizeF QWebViewKineticScroller::viewportSize() const
+{
+    Q_D(const QWebViewKineticScroller);
+
+    return d->web ? d->web->page()->viewportSize() : QSize();
+}
+
+QPointF QWebViewKineticScroller::maximumContentPosition() const
+{
+    Q_D(const QWebViewKineticScroller);
+    
+    QWebFrame *frame = d->currentFrame();
+    QSize s = frame ? frame->contentsSize() - frame->geometry().size() : QSize();
+    return QPointF(qMax(0, s.width()), qMax(0, s.height()));
+}
+
+QPointF QWebViewKineticScroller::contentPosition() const
+{
+    Q_D(const QWebViewKineticScroller);
+
+    QWebFrame *frame = d->currentFrame();
+    return frame ? QPointF(frame->scrollPosition()) + d->fractionalPosition : QPointF();
+}
+
+void QWebViewKineticScroller::setContentPosition(const QPointF &p, const QPointF & /*overshoot*/)
+{
+    Q_D(QWebViewKineticScroller);
+    
+    QWebFrame *frame = d->currentFrame();
+    if (frame) {
+        QPoint pint(int(p.x()), int(p.y()));
+        frame->setScrollPosition(pint);
+        d->fractionalPosition = p - QPointF(pint);
+    }
+}
+
+QT_END_NAMESPACE
diff --git a/testapp/qwebviewkineticscroller.h b/testapp/qwebviewkineticscroller.h
new file mode 100644
index 0000000..1de369d
--- /dev/null
+++ b/testapp/qwebviewkineticscroller.h
@@ -0,0 +1,89 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QWEBVIEWKINETICSCROLLER_H
+#define QWEBVIEWKINETICSCROLLER_H
+
+#include <qkineticscroller.h>
+#include <QWebView>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Gui)
+
+class QWebViewKineticScrollerPrivate;
+
+class Q_GUI_EXPORT QWebViewKineticScroller : public QObject, public QKineticScroller
+{
+    Q_OBJECT
+public:
+    QWebViewKineticScroller();
+    // QWebViewKineticScroller(QWebViewKineticScrollerPrivate &dd);
+    ~QWebViewKineticScroller();
+
+    void setWidget(QWebView *widget);
+
+    bool eventFilter(QObject *o, QEvent *e);
+
+protected:
+
+    virtual QSizeF viewportSize() const;
+    virtual QPointF maximumContentPosition() const;
+    virtual QPointF contentPosition() const;
+    virtual void setContentPosition(const QPointF &pos, const QPointF &overshootDelta);
+
+    virtual bool canStartScrollingAt(const QPointF &pos) const;
+    virtual void cancelPress(const QPointF &pressPos);
+
+    QScopedPointer<QWebViewKineticScrollerPrivate> d_ptr;
+
+private:
+    Q_DISABLE_COPY(QWebViewKineticScroller)
+    Q_DECLARE_PRIVATE(QWebViewKineticScroller)
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QWEBVIEWSCROLLER_H