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# diagramtextitem.cpp Example File
graphicsview/diagramscene/diagramtextitem.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2007-2007 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the example classes of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
     ** License version 2.0 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 GNU
     ** General Public Licensing requirements will be met:
     ** http://www.trolltech.com/products/qt/opensource.html
     **
     ** If you are unsure which license is appropriate for your use, please
     ** review the following information:
     ** http://www.trolltech.com/products/qt/licensing.html or contact the
     ** sales department at sales@trolltech.com.
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #include <QtGui>

     #include "diagramtextitem.h"
     #include "diagramscene.h"

     DiagramTextItem::DiagramTextItem(QGraphicsItem *parent, QGraphicsScene *scene)
         : QGraphicsTextItem(parent, scene)
     {
         setFlag(QGraphicsItem::ItemIsMovable);
         setFlag(QGraphicsItem::ItemIsSelectable);
     }

     QVariant DiagramTextItem::itemChange(GraphicsItemChange change,
                          const QVariant &value)
     {
         if (change == QGraphicsItem::ItemSelectedChange)
             emit selectedChange(this);
         return value;
     }

     void DiagramTextItem::focusOutEvent(QFocusEvent *event)
     {
         setTextInteractionFlags(Qt::NoTextInteraction);
         emit lostFocus(this);
         QGraphicsTextItem::focusOutEvent(event);
     }

     void DiagramTextItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
     {
         scene()->clearSelection();
         QGraphicsTextItem::mousePressEvent(event);
         setSelected(true);
     }

     void DiagramTextItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
     {
         if (textInteractionFlags() & Qt::TextEditable) {
             QGraphicsTextItem::mouseMoveEvent(event);
         } else
             QGraphicsItem::mouseMoveEvent(event);
     }

     void DiagramTextItem::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
     {
         setTextInteractionFlags(Qt::TextEditorInteraction);
         QGraphicsSceneMouseEvent *mouseEvent =
             new QGraphicsSceneMouseEvent(QEvent::GraphicsSceneMousePress);
         mouseEvent->setAccepted(true);
         mouseEvent->setPos(event->pos());
         mouseEvent->setScenePos(event->scenePos());
         mouseEvent->setScreenPos(event->screenPos());
         mouseEvent->setButtonDownPos(Qt::LeftButton,
             event->buttonDownPos(Qt::LeftButton));
         mouseEvent->setButtonDownScreenPos(Qt::LeftButton,
             event->buttonDownScreenPos(Qt::LeftButton));
         mouseEvent->setButtonDownScenePos(Qt::LeftButton,
             event->buttonDownScenePos(Qt::LeftButton));
         mouseEvent->setWidget(event->widget());

         QGraphicsTextItem::mousePressEvent(mouseEvent);

         delete mouseEvent;
     }