graphicsedge.h

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/***************************************************************************
 SocNetV: Social Network Visualizer
 version: 3.1
 Written in Qt
 
 graphicsedge.h - description
 -------------------
 copyright : (C) 2005-2023 by Dimitris B. Kalamaras
 project site : https://socnetv.org
 
 ***************************************************************************/
 
/*******************************************************************************
* This program is free software: you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
********************************************************************************/
 
#ifndef GRAPHICSEDGE_H
#define GRAPHICSEDGE_H
 
 
#include <QGraphicsItem>
#include <QObject>
#include <utility> //declares pair construct
 
 
class GraphicsWidget;
class QGraphicsSceneMouseEvent;
class GraphicsNode;
class GraphicsEdgeWeight;
class GraphicsEdgeLabel;
 
QT_USE_NAMESPACE
 
using namespace std;
 
 
static const int TypeEdge= QGraphicsItem::UserType+2;
static const int ZValueEdge = 50;
static const int ZValueEdgeHighlighted = 99;
 
static const int EDGE_STATE_REGULAR = 0;
static const int EDGE_STATE_HIGHLIGHT = 1;
static const int EDGE_STATE_HOVER = 2;
 
 
 
 
 
class GraphicsEdge : public QObject, public QGraphicsItem {
 Q_OBJECT
 Q_INTERFACES (QGraphicsItem)
 
public:
 GraphicsEdge(GraphicsWidget *, GraphicsNode*, GraphicsNode*, const qreal &weight,
 const QString &label, const QString &color,
 const Qt::PenStyle &style,
 const int&type, const bool & drawArrows, const bool &bezier,
 const bool &weightNumbers=false,
 const bool &highlighting=true);
 ~GraphicsEdge();
 
 enum { Type = UserType + 2 };
 int type() const { return Type; }
 
 GraphicsNode *sourceNode() const;
 void setSourceNode(GraphicsNode *node);
 
 GraphicsNode *targetNode() const;
 void setTargetNode(GraphicsNode *node);
 
 int sourceNodeNumber();
 int targetNodeNumber();
 
 qreal dx() const;
 
 qreal dy() const;
 
 qreal length() const;
 
 void setSourceNodeSize(const int & size);
 void setTargetNodeSize(const int & size);
 
 void setMinimumOffsetFromNode(const int & offset);
 
 void removeRefs();
 
 void setWeight( const qreal &w) ;
 qreal weight() const;
 void addWeightNumber ();
 //void deleteWeightNumber();
 void setWeightNumberVisibility (const bool &toggle);
 
 void setLabel( const QString &label) ;
 QString label() const;
 void addLabel();
 //void deleteLabel();
 void setLabelVisibility (const bool &toggle);
 
 void showArrows(const bool &);
 
 void setDirectionType(const int &dirType=0);
 int directionType();
 
 qreal width() const;
 
 QPen pen() const;
 void setState(const int &state);
 
 void setStyle( const Qt::PenStyle &style);
 Qt::PenStyle style() const;
 
 void setColor( const QString &str) ;
 //QString color() const ;
 QColor color() const;
 QString colorToPajek();
 
 void setHighlighted (const bool &flag);
 void setHighlighting (const bool &toggle);
 
 QPainterPath shape() const;
 
 
public slots:
 void adjust ();
 
protected:
 QRectF boundingRect() const;
 void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
 QVariant itemChange(GraphicsItemChange change, const QVariant &value);
// void mousePressEvent(QGraphicsSceneMouseEvent *event);
 
 
 
private:
 GraphicsWidget *graphicsWidget;
 
 GraphicsNode *source, *target;
 
 GraphicsEdgeWeight* weightNumber;
 
 GraphicsEdgeLabel* edgeLabel;
 
 QPainterPath m_path;
 
 QPointF sourcePoint, targetPoint;
 
 QPointF edgeOffset;
 
 qreal m_arrowSize;
 
 qreal m_minOffsetFromNode;
 qreal m_offsetFromTargetNode, m_offsetFromSourceNode;
 
 Qt::PenStyle m_style;
 int m_state;
 
 QString m_colorNegative, m_label;
 QColor m_color;
 
 qreal m_weight, m_width;
 
 int m_edgeDirType;
 
 qreal angle, line_length, line_dx, line_dy;
 
 bool m_Bezier, m_drawArrows, m_drawWeightNumber;
 bool m_drawLabel, m_hoverHighlighting;
 bool m_isClicked;
};
 
#endif