--- a/examples/graphicsview/elasticnodes/graphwidget.cpp	Wed Jun 23 19:07:03 2010 +0300
+++ b/examples/graphicsview/elasticnodes/graphwidget.cpp	Tue Jul 06 15:10:48 2010 +0300
@@ -6,35 +6,34 @@
 **
 ** 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 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.
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
 **
-** 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.
+** "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."
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
@@ -43,14 +42,13 @@
 #include "edge.h"
 #include "node.h"
 
-#include <QDebug>
-#include <QGraphicsScene>
-#include <QWheelEvent>
+#include <QtGui>
 
 #include <math.h>
 
-GraphWidget::GraphWidget()
-    : timerId(0)
+//! [0]
+GraphWidget::GraphWidget(QWidget *parent)
+    : QGraphicsView(parent), timerId(0)
 {
     QGraphicsScene *scene = new QGraphicsScene(this);
     scene->setItemIndexMethod(QGraphicsScene::NoIndex);
@@ -60,8 +58,12 @@
     setViewportUpdateMode(BoundingRectViewportUpdate);
     setRenderHint(QPainter::Antialiasing);
     setTransformationAnchor(AnchorUnderMouse);
-    setResizeAnchor(AnchorViewCenter);
+    scale(qreal(0.8), qreal(0.8));
+    setMinimumSize(400, 400);
+    setWindowTitle(tr("Elastic Nodes"));
+//! [0]
 
+//! [1]
     Node *node1 = new Node(this);
     Node *node2 = new Node(this);
     Node *node3 = new Node(this);
@@ -102,18 +104,18 @@
     node7->setPos(-50, 50);
     node8->setPos(0, 50);
     node9->setPos(50, 50);
+}
+//! [1]
 
-    scale(qreal(0.8), qreal(0.8));
-    setMinimumSize(400, 400);
-    setWindowTitle(tr("Elastic Nodes"));
-}
-
+//! [2]
 void GraphWidget::itemMoved()
 {
     if (!timerId)
         timerId = startTimer(1000 / 25);
 }
+//! [2]
 
+//! [3]
 void GraphWidget::keyPressEvent(QKeyEvent *event)
 {
     switch (event->key()) {
@@ -146,7 +148,9 @@
         QGraphicsView::keyPressEvent(event);
     }
 }
+//! [3]
 
+//! [4]
 void GraphWidget::timerEvent(QTimerEvent *event)
 {
     Q_UNUSED(event);
@@ -171,12 +175,16 @@
         timerId = 0;
     }
 }
+//! [4]
 
+//! [5]
 void GraphWidget::wheelEvent(QWheelEvent *event)
 {
     scaleView(pow((double)2, -event->delta() / 240.0));
 }
+//! [5]
 
+//! [6]
 void GraphWidget::drawBackground(QPainter *painter, const QRectF &rect)
 {
     Q_UNUSED(rect);
@@ -213,12 +221,15 @@
     painter->setPen(Qt::black);
     painter->drawText(textRect, message);
 }
+//! [6]
 
+//! [7]
 void GraphWidget::scaleView(qreal scaleFactor)
 {
-    qreal factor = matrix().scale(scaleFactor, scaleFactor).mapRect(QRectF(0, 0, 1, 1)).width();
+    qreal factor = transform().scale(scaleFactor, scaleFactor).mapRect(QRectF(0, 0, 1, 1)).width();
     if (factor < 0.07 || factor > 100)
         return;
 
     scale(scaleFactor, scaleFactor);
 }
+//! [7]