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

 /****************************************************************************
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 ** Copyright (C) 2007-2008 Trolltech ASA. All rights reserved.
 **
 ** This file is part of the example classes of the Qt Toolkit.
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 ** Licensees holding a valid Qt License Agreement may use this file in
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 ** contained therein.  Please consult your licensing agreement or
 ** contact sales@trolltech.com if any conditions of this licensing
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 ** contacting info@trolltech.com.
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 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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 ****************************************************************************/

 #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;
 }


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Qt 4.3.5