--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/declarative/cppextensions/qgraphicslayouts/qgraphicsgridlayout/gridlayout.cpp	Wed Aug 18 10:37:55 2010 +0300
@@ -0,0 +1,188 @@
+/****************************************************************************
+**
+** 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 QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "gridlayout.h"
+
+#include <QGraphicsWidget>
+#include <QDebug>
+
+GridLayoutAttached::GridLayoutAttached(QObject *parent)
+: QObject(parent), m_row(-1), m_column(-1), m_rowspan(1), m_colspan(1), m_alignment(-1), m_rowStretch(-1),
+    m_colStretch(-1), m_rowSpacing(-1), m_colSpacing(-1), m_rowPrefHeight(-1), m_rowMaxHeight(-1), m_rowMinHeight(-1),
+    m_rowFixHeight(-1), m_colPrefwidth(-1), m_colMaxwidth(-1), m_colMinwidth(-1), m_colFixwidth(-1)
+{
+}
+
+void GridLayoutAttached::setAlignment(Qt::Alignment a)
+{
+    if (m_alignment != a) {
+        m_alignment = a;
+        emit alignmentChanged(reinterpret_cast<QGraphicsLayoutItem*>(parent()), m_alignment);
+    }
+}
+
+QHash<QGraphicsLayoutItem*, GridLayoutAttached*> GraphicsGridLayoutObject::attachedProperties;
+
+GraphicsGridLayoutObject::GraphicsGridLayoutObject(QObject *parent)
+: QObject(parent)
+{
+}
+
+GraphicsGridLayoutObject::~GraphicsGridLayoutObject()
+{
+}
+
+void GraphicsGridLayoutObject::addWidget(QGraphicsWidget *widget)
+{
+    //use attached properties
+    if (QObject *obj = attachedProperties.value(qobject_cast<QGraphicsLayoutItem*>(widget))) {
+        int row = static_cast<GridLayoutAttached *>(obj)->row();
+        int column = static_cast<GridLayoutAttached *>(obj)->column();
+        int rowSpan = static_cast<GridLayoutAttached *>(obj)->rowSpan();
+        int columnSpan = static_cast<GridLayoutAttached *>(obj)->columnSpan();
+        if (row == -1 || column == -1) {
+            qWarning() << "Must set row and column for an item in a grid layout";
+            return;
+        }
+        addItem(widget, row, column, rowSpan, columnSpan);
+    }
+}
+
+void GraphicsGridLayoutObject::addLayoutItem(QGraphicsLayoutItem *item)
+{
+    //use attached properties
+    if (GridLayoutAttached *obj = attachedProperties.value(item)) {
+        int row = obj->row();
+        int column = obj->column();
+        int rowSpan = obj->rowSpan();
+        int columnSpan = obj->columnSpan();
+        Qt::Alignment alignment = obj->alignment();
+
+        if (row == -1 || column == -1) {
+            qWarning() << "Must set row and column for an item in a grid layout";
+            return;
+        }
+
+        if (obj->rowSpacing() != -1)
+            setRowSpacing(row, obj->rowSpacing());
+        if (obj->columnSpacing() != -1)
+            setColumnSpacing(column, obj->columnSpacing());
+        if (obj->rowStretchFactor() != -1)
+            setRowStretchFactor(row, obj->rowStretchFactor());
+        if (obj->columnStretchFactor() != -1)
+            setColumnStretchFactor(column, obj->columnStretchFactor());
+        if (obj->rowPreferredHeight() != -1)
+            setRowPreferredHeight(row, obj->rowPreferredHeight());
+        if (obj->rowMaximumHeight() != -1)
+            setRowMaximumHeight(row, obj->rowMaximumHeight());
+        if (obj->rowMinimumHeight() != -1)
+            setRowMinimumHeight(row, obj->rowMinimumHeight());
+        if (obj->rowFixedHeight() != -1)
+            setRowFixedHeight(row, obj->rowFixedHeight());
+        if (obj->columnPreferredWidth() != -1)
+            setColumnPreferredWidth(row, obj->columnPreferredWidth());
+        if (obj->columnMaximumWidth() != -1)
+            setColumnMaximumWidth(row, obj->columnMaximumWidth());
+        if (obj->columnMinimumWidth() != -1)
+            setColumnMinimumWidth(row, obj->columnMinimumWidth());
+        if (obj->columnFixedWidth() != -1)
+            setColumnFixedWidth(row, obj->columnFixedWidth());
+
+        addItem(item, row, column, rowSpan, columnSpan);
+
+        if (alignment != -1)
+            setAlignment(item, alignment);
+        QObject::connect(obj, SIGNAL(alignmentChanged(QGraphicsLayoutItem*, Qt::Alignment)),
+                         this, SLOT(updateAlignment(QGraphicsLayoutItem*, Qt::Alignment)));
+    }
+}
+
+void GraphicsGridLayoutObject::removeAt(int index)
+{
+    QGraphicsLayoutItem *item = itemAt(index);
+    if (item) {
+        GridLayoutAttached *obj = attachedProperties.value(item);
+        obj->disconnect(this);
+        attachedProperties.remove(item);
+    }
+    QGraphicsGridLayout::removeAt(index);
+}
+
+void GraphicsGridLayoutObject::clearChildren()
+{
+    // do not delete the removed items; they will be deleted by the QML engine
+    while (count() > 0)
+        removeAt(count()-1);
+}
+
+qreal GraphicsGridLayoutObject::spacing() const
+{
+    if (verticalSpacing() == horizontalSpacing())
+        return verticalSpacing();
+    return -1; 
+}
+
+qreal GraphicsGridLayoutObject::contentsMargin() const
+{
+    qreal a, b, c, d;
+    getContentsMargins(&a, &b, &c, &d);
+    if (a == b && a == c && a == d)
+        return a;
+    return -1;
+}
+
+void GraphicsGridLayoutObject::setContentsMargin(qreal m)
+{
+    setContentsMargins(m, m, m, m);
+}
+
+void GraphicsGridLayoutObject::updateAlignment(QGraphicsLayoutItem *item, Qt::Alignment alignment)
+{
+    QGraphicsGridLayout::setAlignment(item, alignment);
+}
+
+GridLayoutAttached *GraphicsGridLayoutObject::qmlAttachedProperties(QObject *obj)
+{
+    GridLayoutAttached *rv = new GridLayoutAttached(obj);
+    if (qobject_cast<QGraphicsLayoutItem*>(obj))
+        attachedProperties.insert(qobject_cast<QGraphicsLayoutItem*>(obj), rv);
+    return rv;
+}
+