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/*
Copyright (C) 2015 - 2015 Evan Teran
evan.teran@gmail.com
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 2 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 GRAPH_EDGE_H_20090903_
#define GRAPH_EDGE_H_20090903_
#include <QColor>
#include <QGraphicsItemGroup>
#include <graphviz/cgraph.h>
#include <graphviz/gvc.h>
class GraphWidget;
class GraphNode;
class GraphicsLineItem;
class GraphEdge final : public QGraphicsItemGroup {
public:
GraphEdge(GraphNode *from, GraphNode *to, const QColor &color = Qt::black, QGraphicsItem *parent = nullptr);
GraphEdge(const GraphEdge &) = delete;
GraphEdge &operator=(const GraphEdge &) = delete;
~GraphEdge() override;
public:
enum { Type = UserType + 3 };
int type() const override {
// Enable the use of qgraphicsitem_cast with this item.
return Type;
}
public:
GraphNode *from() const;
GraphNode *to() const;
void clear();
void syncState();
public:
int lineThickness() const;
QColor lineColor() const;
public:
void updateLines();
protected:
void createLine();
QGraphicsPolygonItem *addArrowHead(const QLineF &line);
QGraphicsPolygonItem *addArrowHead(const QLineF &line, int lineThickness, const QColor &color, int ZValue);
QLineF shortenLineToNode(QLineF line);
QGraphicsLineItem *createLineSegment(const QPointF &p1, const QPointF &p2, const QPen &pen);
QGraphicsLineItem *createLineSegment(const QLineF &line, const QPen &pen);
protected:
GraphNode *from_ = nullptr;
GraphNode *to_ = nullptr;
GraphWidget *graph_ = nullptr;
Agedge_t *edge_ = nullptr;
QColor color_;
};
#endif
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