--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ginebra2/ScrollableViewBase.cpp	Tue Jul 06 14:03:49 2010 +0300
@@ -0,0 +1,158 @@
+/*
+* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU Lesser General Public License as published by
+* the Free Software Foundation, version 2.1 of the License.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public License
+* along with this program.  If not,
+* see "http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html/".
+*
+* Description:
+*
+*/
+
+#include "ScrollableViewBase.h"
+
+
+#include "Kinetics/KineticScroller.h"
+
+#include <QGraphicsScene>
+#include <QGraphicsSceneMouseEvent>
+#include <QPointF>
+
+namespace GVA {
+
+ScrollableViewBase::ScrollableViewBase(QGraphicsItem* parent, Qt::WindowFlags wFlags)
+    : QGraphicsWidget(parent, wFlags)
+    , m_scrollWidget(0)
+{
+    //To get only the mouse events within the ScrollableViewBase.
+    setFlag(QGraphicsItem::ItemClipsToShape, true);
+
+    //To disable childrens painting outside the ViewportItem's rect.
+    setFlag(QGraphicsItem::ItemClipsChildrenToShape, true);
+
+    //To speed up painting.
+    setFlag(QGraphicsItem::ItemHasNoContents, true);
+    setAttribute(Qt::WA_OpaquePaintEvent, true);
+
+    m_kineticScroller = new KineticScroller(this);
+
+    //Event filter on all children of the viewport, so that all mouse
+    //events can be intercepted and used for kinetic scrolling.
+    setFiltersChildEvents(true);
+}
+
+ScrollableViewBase::~ScrollableViewBase()
+{}
+
+void ScrollableViewBase::setWidget(QGraphicsWidget* view)
+{
+    if (view == m_scrollWidget)
+        return;
+
+    if (m_scrollWidget) {
+        m_scrollWidget->setParentItem(0);
+        delete m_scrollWidget;
+    }
+
+    m_scrollWidget = view;
+    m_scrollWidget->setAttribute(Qt::WA_OpaquePaintEvent, true);
+    m_scrollWidget->setParentItem(this);
+}
+
+QSize ScrollableViewBase::viewportSize() const
+{
+    return size().toSize();
+}
+
+QPoint ScrollableViewBase::maximumScrollPosition() const
+{
+    QSizeF contentsSize = m_scrollWidget->size();
+    QSizeF viewportSize = size();
+    QSize maxScrollSize = (contentsSize - viewportSize).toSize();
+
+    return QPoint(qMax(0, maxScrollSize.width()), qMax(0, maxScrollSize.height()));
+}
+
+QPoint ScrollableViewBase::scrollPosition() const
+{
+    return (-scrollWidgetPos()).toPoint();
+}
+
+void ScrollableViewBase::setScrollPosition(const QPoint& pos, const QPoint& overShoot)
+{
+    m_overShoot = overShoot;
+    setScrollWidgetPos(-pos);
+}
+
+void ScrollableViewBase::stateChanged(KineticScrollable::State oldState
+                                      , KineticScrollable::State newState)
+{
+    Q_UNUSED(oldState);
+    Q_UNUSED(newState);
+}
+
+void ScrollableViewBase::setScrollWidgetGeometry(const QRectF& geom)
+{
+    scrollWidget()->setGeometry(adjustScrollWidgetRect(geom));
+}
+
+QRectF ScrollableViewBase::adjustScrollWidgetRect(const QRectF& rect)
+{
+    //FIX ME : Stop animation of scroll widget before adjusting it here??
+    QRectF newRect(rect);
+
+    QSizeF widgetSize = rect.size();
+    QSizeF viewportSize = size();
+
+    qreal w = viewportSize.width() - widgetSize.width();
+    qreal h = viewportSize.height() - widgetSize.height();
+
+    if ( w > 0 ) {
+        newRect.moveLeft(0);
+        m_extraPos.setX(w/2);
+      }
+    else {
+    	m_extraPos.setX(0);
+        if (newRect.x() < w)
+            newRect.moveLeft(w);
+        if (newRect.x() > 0)
+            newRect.moveLeft(0);
+    }
+
+    if ( h > 0 ) {
+        m_extraPos.setY(h/2);
+        newRect.moveTop(0);
+      }
+    else {
+    	 m_extraPos.setY(0);
+        if (newRect.y() < h)
+            newRect.moveTop(h);
+        if (newRect.y() > 0)
+            newRect.moveTop(0);
+    }
+    //newRect.translate(m_extraPos);
+    newRect.translate(m_overShoot);
+    return newRect;
+}
+
+void ScrollableViewBase::setScrollWidgetPos(const QPointF& pos)
+{
+    setScrollWidgetGeometry(QRectF(pos, scrollWidget()->size()));
+}
+
+QPointF ScrollableViewBase::scrollWidgetPos() const
+{
+    return scrollWidget()->pos()  /*- m_extraPos*/ - m_overShoot;
+}
+
+} //namespace GVA