Home · All Namespaces · All Classes · Main Classes · Grouped Classes · Modules · Functions

diagramscene.h Example File
graphicsview/diagramscene/diagramscene.h

 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
 ** Contact: Qt Software Information ([email protected])
 **
 ** 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 1.0, 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 are unsure which license is appropriate for your use, please
 ** contact the sales department at [email protected].
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #ifndef DIAGRAMSCENE_H
 #define DIAGRAMSCENE_H

 #include <QGraphicsScene>
 #include "diagramitem.h"
 #include "diagramtextitem.h"

 class QGraphicsSceneMouseEvent;
 class QMenu;
 class QPointF;
 class QGraphicsLineItem;
 class QFont;
 class QGraphicsTextItem;
 class QColor;

 class DiagramScene : public QGraphicsScene
 {
     Q_OBJECT

 public:
     enum Mode { InsertItem, InsertLine, InsertText, MoveItem };

     DiagramScene(QMenu *itemMenu, QObject *parent = 0);
     QFont font() const
         { return myFont; }
     QColor textColor() const
         { return myTextColor; }
     QColor itemColor() const
         { return myItemColor; }
     QColor lineColor() const
         { return myLineColor; }
     void setLineColor(const QColor &color);
     void setTextColor(const QColor &color);
     void setItemColor(const QColor &color);
     void setFont(const QFont &font);

 public slots:
     void setMode(Mode mode);
     void setItemType(DiagramItem::DiagramType type);
     void editorLostFocus(DiagramTextItem *item);

 signals:
     void itemInserted(DiagramItem *item);
     void textInserted(QGraphicsTextItem *item);
     void itemSelected(QGraphicsItem *item);

 protected:
     void mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent);
     void mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent);
     void mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent);

 private:
     bool isItemChange(int type);

     DiagramItem::DiagramType myItemType;
     QMenu *myItemMenu;
     Mode myMode;
     bool leftButtonDown;
     QPointF startPoint;
     QGraphicsLineItem *line;
     QFont myFont;
     DiagramTextItem *textItem;
     QColor myTextColor;
     QColor myItemColor;
     QColor myLineColor;
 };

 #endif