Add functional Graphics View benchmarks.

Widgets and use cases are externally developed and imported from:
git://gitorious.org/+qt-performance-test-developers/qt/qt-performance-test-developers-clone.git
(master branch, tests/benchmarks/uimodels/GraphicsViewBenchmark)

I couldn't simply import everything because the benchmarks were heavily
dependent on an internal measuring tool involving QtScripts and whatnot,
not suitable for inclusion in the Qt repository. Everything is now converted
into proper QTestLib compatible benchmark functions.

1 files changed, 401 insertions, 0 deletions

diff --git a/tests/benchmarks/gui/graphicsview/functional/GraphicsViewBenchmark/widgets/abstractitemcontainer.cpp b/tests/benchmarks/gui/graphicsview/functional/GraphicsViewBenchmark/widgets/abstractitemcontainer.cpp
new file mode 100644
index 0000000..a3628fd
--- /dev/null
+++ b/tests/benchmarks/gui/graphicsview/functional/GraphicsViewBenchmark/widgets/abstractitemcontainer.cpp
@@ -0,0 +1,401 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples 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 <QDebug>
+#include <QGraphicsLayout>
+
+#include "abstractitemcontainer.h"
+#include "abstractitemview.h"
+#include "abstractviewitem.h"
+#include "scrollbar.h"
+
+AbstractItemContainer::AbstractItemContainer(int bufferSize, QGraphicsWidget *parent)
+    : GvbWidget(parent),
+    m_items(),
+    m_itemView(0),
+    m_prototype(0),
+    m_bufferSize(bufferSize),
+    m_twoColumns(false)
+{
+}
+
+AbstractItemContainer::~AbstractItemContainer()
+{
+    delete m_prototype;
+    m_prototype = 0;
+}
+
+AbstractViewItem *AbstractItemContainer::prototype()
+{
+    return m_prototype;
+}
+
+int AbstractItemContainer::bufferSize() const
+{
+    return m_bufferSize;
+}
+
+bool AbstractItemContainer::event(QEvent *e)
+{
+    if (e->type() == QEvent::LayoutRequest)
+        updateItemBuffer();
+
+    return QGraphicsWidget::event(e);
+}
+
+
+bool AbstractItemContainer::eventFilter(QObject *obj, QEvent *event)
+{
+    if (event->type()==QEvent::GraphicsSceneResize && m_itemView) {
+#if (QT_VERSION >= 0x040600)
+        const bool caching = m_itemView->listItemCaching();
+        m_itemView->setListItemCaching(false);
+#endif
+
+        QSizeF s = m_itemView->size();
+        s.setWidth(s.width()-m_itemView->verticalScrollBar()->size().width());
+        adjustVisibleContainerSize(s);
+
+        m_itemView->updateViewContent();
+        updateItemBuffer();
+
+#if (QT_VERSION >= 0x040600)
+        m_itemView->setListItemCaching(caching);
+#endif
+    }
+
+    return QGraphicsWidget::eventFilter(obj, event);
+}
+
+QVariant AbstractItemContainer::itemChange(GraphicsItemChange change, const QVariant &value)
+{
+    QVariant ichange = QGraphicsWidget::itemChange(change,value);
+
+    if (change == ItemPositionChange) {
+        if (m_itemView && layout() && !layout()->isActivated())
+            m_itemView->refreshContainerGeometry();
+    }
+    return ichange;
+ }
+
+/*virtual*/
+void AbstractItemContainer::setItemView(AbstractItemView *view)
+{
+    m_itemView = view;
+
+    if (m_itemView) {
+        setParentItem(m_itemView);
+        m_itemView->installEventFilter(this);
+    }
+}
+/*virtual*/
+void AbstractItemContainer::setItemPrototype(AbstractViewItem *ptype)
+{
+    m_prototype = ptype;
+    m_prototype->setParentItem(0);
+    m_prototype->hide();
+}
+
+/*virtual*/
+void AbstractItemContainer::reset()
+{
+    qDeleteAll(m_items);
+    m_items.clear();
+    updateItemBuffer();
+}
+
+
+/*virtual*/
+void AbstractItemContainer::addItem(const QModelIndex &index)
+{
+    if (m_items.count() < maxItemCountInItemBuffer() ||
+        (m_items.count() > 0 &&
+            m_items.first()->modelIndex().row()-1 <= index.row() &&
+            m_items.last()->modelIndex().row() >= index.row())) {
+        int itemPos = 0;
+        if (m_items.count() != 0)
+            itemPos = qMax(0, index.row() - m_items.first()->modelIndex().row());
+
+        if (itemPos >= m_items.count() || m_items.at(itemPos)->modelIndex() != index) {
+            AbstractViewItem *item = 0;
+            if (m_prototype)
+                item = m_prototype->newItemInstance();
+
+            if (item) {
+                item->setModel(m_itemView->model());
+                item->setTwoColumns(m_twoColumns);
+                m_items.insert(itemPos, item);
+                addItemToVisibleLayout(itemPos, item);
+
+                if (item->modelIndex() != index) {
+                    item->setModelIndex(index);
+                }
+            }
+        }
+        updateItemBuffer();
+    }
+}
+void AbstractItemContainer::removeItem(const QModelIndex &index)
+{
+    AbstractViewItem *item = findItemByIndex(index);
+
+    if (item) {
+        if (maxItemCountInItemBuffer() < m_items.count()) {
+            m_items.removeOne(item);
+            removeItemFromVisibleLayout(item);
+
+            delete item;
+        }
+        else {
+            m_items.removeOne(item);
+            removeItemFromVisibleLayout(item);
+
+            QModelIndex newIndex = m_itemView->nextIndex(m_items.last()->modelIndex());
+            if (newIndex.isValid()) {
+                // Item readded as last item in buffer.
+                m_items.append(item);
+                addItemToVisibleLayout(m_items.count() - 1, item);
+                item->setModelIndex(newIndex);
+            } else {
+                // Item readded as first item in buffer.
+                newIndex = m_itemView->previousIndex(m_items.first()->modelIndex());
+
+                m_items.prepend(item);
+                addItemToVisibleLayout(0, item);
+                item->setModelIndex(newIndex);
+            }
+        }
+    }
+}
+
+/*virtual*/
+int AbstractItemContainer::itemCount() const
+{
+    return m_items.count();
+}
+
+AbstractViewItem *AbstractItemContainer::firstItem()
+{
+    return m_items.first();
+}
+
+/*virtual*/
+AbstractViewItem* AbstractItemContainer::itemAt(const int row) const
+{
+    if (row<0 || row >= m_items.count())
+        return 0;
+    return m_items.at(row);
+}
+
+AbstractViewItem* AbstractItemContainer::findItemByIndex(const QModelIndex &index) const
+{
+    AbstractViewItem *item = 0;
+    for (int i = 0; i < m_items.count(); ++i) {
+        if (m_items.at(i)->modelIndex() == index) {
+            item = m_items.at(i);
+            break;
+        }
+    }
+    return item;
+}
+
+bool AbstractItemContainer::itemVisibleInView(AbstractViewItem* item, const QRectF &viewRect, bool fullyVisible) const
+{
+    if (!item || !m_itemView)
+        return false;
+
+    QRectF itemRectBoundingRect = item->mapToItem(m_itemView, item->boundingRect()).boundingRect();
+
+    if (fullyVisible && viewRect.contains(itemRectBoundingRect))
+        return true;
+    else if (viewRect.intersects(itemRectBoundingRect))
+        return true;
+
+    return false;
+}
+
+void AbstractItemContainer::updateItemBuffer()
+{
+    if (!m_itemView || (m_itemView && !m_itemView->boundingRect().isValid()))
+        return;
+
+    int maxCount = maxItemCountInItemBuffer();
+
+    if (m_items.count() < maxCount) {
+        // New items needs to be added.
+        QModelIndex index;
+        if (m_items.count() > 0)
+            index = m_items.last()->modelIndex();
+        while (m_items.count() < maxCount) {            
+            index = m_itemView->nextIndex(index);
+
+            if (!index.isValid())
+                break;
+
+            insertItem(m_items.count(), index);
+        }
+
+        index = m_items.first()->modelIndex();
+        while (m_items.count() < maxCount) {
+            index = m_itemView->previousIndex(index);
+
+            if (!index.isValid())
+                break;
+
+            insertItem(0, index);
+        }
+    }
+
+    QRectF viewRect = boundingRect();
+
+    while (m_items.count() > maxCount) {
+        int firstVisible = 0;
+        int lastVisible = 0;
+        findFirstAndLastVisibleBufferIndex(firstVisible, lastVisible, viewRect, false);
+
+        AbstractViewItem* item = 0;
+        if (lastVisible != m_items.count() - 1) {
+            item = m_items.takeLast();
+        }
+        else if (firstVisible != 0 && m_items.first()->modelIndex().row() != firstVisible-1) {
+            item = m_items.takeFirst();
+        }
+        else {
+            // All the items are visible. Take the item at the end of the buffer.
+            item = m_items.takeLast();
+        }
+
+        m_items.removeOne(item);
+        removeItemFromVisibleLayout(item);
+        delete item;
+    }
+}
+
+void AbstractItemContainer::insertItem(int pos, const QModelIndex &index)
+{
+    AbstractViewItem *item = 0;
+     if (m_prototype)
+        item = m_prototype->newItemInstance();
+
+    if (item) {
+        item->setModel(m_itemView->model());        
+        item->setModelIndex(index);
+        item->setTwoColumns(m_twoColumns);
+        m_items.insert(pos, item);
+        addItemToVisibleLayout(pos, item);
+        item->updateItemContents();
+        if (pos == 0)
+            m_itemView->scrollContentsBy(qreal(0.0),
+                                        item->effectiveSizeHint(Qt::PreferredSize).height());
+    }
+}
+
+void AbstractItemContainer::findFirstAndLastVisibleBufferIndex(int &firstVisibleBufferIndex,
+                                                               int &lastVisibleBufferIndex,
+                                                               const QRectF &viewRect,
+                                                               bool fullyVisible) const
+{
+    if (layout() && !layout()->isActivated())
+        layout()->activate();
+
+    firstVisibleBufferIndex = -1;
+    lastVisibleBufferIndex = -1;
+
+    int count = m_items.count();
+    for (int i = 0; i < count; ++i) {        
+        if (itemVisibleInView(m_items.at(i), viewRect, fullyVisible)) {
+            if (firstVisibleBufferIndex == -1)
+                firstVisibleBufferIndex = i;
+            lastVisibleBufferIndex = i;
+        }
+        else if ( lastVisibleBufferIndex != -1 )
+            break; // lastVisibleBufferIndex is already set
+    }
+}
+
+/*virtual*/
+int AbstractItemContainer::maxItemCountInItemBuffer() const
+{
+    if (m_itemView && !m_itemView->boundingRect().isEmpty())
+    {
+        return m_itemView->indexCount();
+    }
+    return 0;
+}
+
+
+void AbstractItemContainer::themeChange()
+{
+    for (int i = 0; i <m_items.count(); ++i) 
+        m_items.at(i)->themeChange();
+}
+
+void AbstractItemContainer::updateContent() 
+{
+    for (int i = 0; i <m_items.count(); ++i) 
+        m_items.at(i)->updateItemContents();
+}
+
+#if (QT_VERSION >= 0x040600)
+void AbstractItemContainer::setSubtreeCacheEnabled(bool enabled)
+{
+    for (int i = 0; i <m_items.count(); ++i)
+        m_items.at(i)->setSubtreeCacheEnabled(enabled);
+    if (m_prototype)
+        m_prototype->setSubtreeCacheEnabled(enabled);
+}
+#endif
+
+void AbstractItemContainer::setTwoColumns(const bool enabled)
+{
+    if (m_twoColumns == enabled)
+        return;
+
+    m_twoColumns = enabled;
+
+    for (int i = 0; i < m_items.count(); ++i)
+        m_items.at(i)->setTwoColumns(enabled);
+}
+
+bool AbstractItemContainer::twoColumns()
+{    
+    return m_twoColumns;
+}
+