1 files changed, 182 insertions, 0 deletions
diff --git a/tests/benchmarks/widgets/graphicsview/functional/GraphicsViewBenchmark/widgets/listitemcontainer.cpp b/tests/benchmarks/widgets/graphicsview/functional/GraphicsViewBenchmark/widgets/listitemcontainer.cpp
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+++ b/tests/benchmarks/widgets/graphicsview/functional/GraphicsViewBenchmark/widgets/listitemcontainer.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <qmath.h>
+#include <QGraphicsLinearLayout>
+#include <QGraphicsScene>
+
+#include "listitemcontainer.h"
+#include "abstractviewitem.h"
+
+#include "recycledlistitem.h"
+#include "listitemcache.h"
+#include "itemrecyclinglist.h"
+
+ListItemContainer::ListItemContainer(int bufferSize, ItemRecyclingList *view, QGraphicsWidget *parent)
+    : AbstractItemContainer(bufferSize, parent)
+    , m_view(view)
+    , m_layout(new QGraphicsLinearLayout(Qt::Vertical))
+    , m_listItemCaching(false)
+{
+    setContentsMargins(0,0,0,0);
+    m_layout->setContentsMargins(0,0,0,0);
+    m_layout->setSpacing(0);
+    setLayout(m_layout);
+}
+
+/*virtual*/
+ListItemContainer::~ListItemContainer()
+{
+    setListItemCaching(false);
+    for (int i = 0; i < m_items.count(); ++i) {
+        m_layout->removeItem(m_items.at(i));
+        m_items.at(i)->setParentItem(0);
+    }
+    qDeleteAll(m_items);
+    m_items.clear();
+}
+
+bool ListItemContainer::listItemCaching() const
+{
+    return m_listItemCaching;
+}
+
+void ListItemContainer::setListItemCaching(const bool enabled)
+{
+    if (m_listItemCaching == enabled)
+        return;
+
+    m_listItemCaching = enabled;
+
+    const int itemCount = m_layout->count();
+
+    for (int i = 0; i < itemCount; ++i)
+        setListItemCaching(enabled, i);
+}
+
+/*virtual*/
+void ListItemContainer::adjustVisibleContainerSize(const QSizeF &size)
+{
+    m_layout->setPreferredWidth(size.width());
+}
+
+/*virtual*/
+void ListItemContainer::addItemToVisibleLayout(int index, AbstractViewItem *item)
+{
+    m_layout->insertItem(index,item);
+
+    setListItemCaching(m_listItemCaching, index);
+}
+
+/*virtual*/
+void ListItemContainer::removeItemFromVisibleLayout(AbstractViewItem *item)
+{
+    m_layout->removeItem(item);
+
+    RecycledListItem *recycledItem = static_cast<RecycledListItem*>(item);
+
+    if (!recycledItem)
+        return;
+
+    ListItem *listItem = recycledItem->item();
+
+    setListItemCaching(false, listItem);
+}
+
+/*virtual*/
+int ListItemContainer::maxItemCountInItemBuffer() const
+{
+    int count = AbstractItemContainer::maxItemCountInItemBuffer();
+
+    if (count > 0) {
+        int currentItemCount = m_items.count();
+        qreal heightOfOneItem = 0;
+        if (currentItemCount > 0)
+        {
+            heightOfOneItem = m_layout->effectiveSizeHint(Qt::PreferredSize).height() / currentItemCount;
+        }
+        int guess = 0;
+        if( heightOfOneItem <= 0 ) {
+            if (m_prototype) {
+                heightOfOneItem = m_prototype->effectiveSizeHint(Qt::PreferredSize).height();
+            }
+            else
+                heightOfOneItem = 50; // TODO magic number, do we have better guess if prototype is not set?
+        }
+        if (heightOfOneItem > 0) {
+            guess = qCeil(m_itemView->boundingRect().height() / heightOfOneItem) + m_bufferSize;
+
+            if (guess < currentItemCount) {
+                if( guess > currentItemCount-2) { // TODO magic number here, Can we use buffer size?
+                    guess = currentItemCount;
+                }
+            }
+        }
+        count = qMin(guess, count);
+    }
+    return count;
+}
+
+void ListItemContainer::setListItemCaching(const bool enabled, const int index)
+{
+    RecycledListItem *recycledItem = static_cast<RecycledListItem*>(m_layout->itemAt(index));
+
+    if (!recycledItem)
+        return;
+
+    ListItem *listItem = recycledItem->item();
+
+    if (!listItem)
+        return;
+
+    setListItemCaching(enabled, listItem);
+}
+
+void ListItemContainer::setListItemCaching(const bool enabled, ListItem *listItem)
+{
+    if (!listItem)
+        return;
+
+    // Deletes the effect.
+    listItem->setGraphicsEffect(0);
+
+    if (enabled) {
+        ListItemCache* cache = new ListItemCache;
+        Q_ASSERT(!listItem->graphicsEffect());
+        listItem->setGraphicsEffect(cache);
+    }
+}
+
+void ListItemContainer::setTwoColumns(const bool twoColumns)
+{
+    AbstractItemContainer::setTwoColumns(twoColumns);
+
+    if (!m_layout->isActivated())
+        m_layout->activate();
+}
+