Changeset 846 for trunk/examples/graphicsview/elasticnodes/graphwidget.cpp

Timestamp:

May 5, 2011, 5:36:53 AM (14 years ago)

Author:

Dmitry A. Kuminov

Message:

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.

Location:

trunk

Files:

• . (modified) (1 prop)
• examples/graphicsview/elasticnodes/graphwidget.cpp (modified) (10 diffs)

trunk/examples/graphicsview/elasticnodes/graphwidget.cpp

@@ -1 +1 @@
 /****************************************************************************
 **
-** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
@@ -7 +7 @@
 ** This file is part of the examples of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
-** Commercial Usage
-** Licensees holding valid Qt Commercial licenses may use this file in
-** accordance with the Qt Commercial License Agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and Nokia.
-**
-** 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 1.1, 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 have questions regarding the use of this file, please contact
-** Nokia at qt-info@nokia.com.
+** $QT_BEGIN_LICENSE:BSD$
+** 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."
 ** $QT_END_LICENSE$
 **
@@ -44 +43 @@
 #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);
@@ -61 +59 @@
     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);
@@ -103 +105 @@
     node8->setPos(0, 50);
     node9->setPos(50, 50);
-
-    scale(qreal(0.8), qreal(0.8));
-    setMinimumSize(400, 400);
-    setWindowTitle(tr("Elastic Nodes"));
-}
-
+}
+//! [1]
+
+//! [2]
 void GraphWidget::itemMoved()
 {
@@ -114 +114 @@
         timerId = startTimer(1000 / 25);
 }
-
+//! [2]
+
+//! [3]
 void GraphWidget::keyPressEvent(QKeyEvent *event)
 {
@@ -147 +149 @@
     }
 }
-
+//! [3]
+
+//! [4]
 void GraphWidget::timerEvent(QTimerEvent *event)
 {
@@ -172 +176 @@
     }
 }
-
+//! [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)
 {
@@ -214 +222 @@
     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;
@@ -223 +233 @@
     scale(scaleFactor, scaleFactor);
 }
+//! [7]