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/*
TikZiT - a GUI diagram editor for TikZ
Copyright (C) 2018 Aleks Kissinger
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 <https://www.gnu.org/licenses/>.
*/
/*!
* Class representing an edge in a Graph.
*/
#ifndef EDGE_H
#define EDGE_H
#include "graphelementdata.h"
#include "node.h"
#include "style.h"
#include <QObject>
#include <QPointF>
class Edge : public QObject
{
Q_OBJECT
public:
explicit Edge(Node *s, Node *t, QObject *parent = nullptr);
Edge *copy(QMap<Node *, Node *> *nodeTable = nullptr);
Node *source() const;
Node *target() const;
bool isSelfLoop();
bool isStraight();
GraphElementData *data() const;
void setData(GraphElementData *data);
QString sourceAnchor() const;
void setSourceAnchor(const QString &sourceAnchor);
QString targetAnchor() const;
void setTargetAnchor(const QString &targetAnchor);
Node *edgeNode() const;
void setEdgeNode(Node *edgeNode);
bool hasEdgeNode();
void updateControls();
void setAttributesFromData();
void updateData();
QPointF head() const;
QPointF tail() const;
QPointF cp1() const;
QPointF cp2() const;
QPointF mid() const;
QPointF headTangent() const;
QPointF tailTangent() const;
int bend() const;
int inAngle() const;
int outAngle() const;
qreal weight() const;
bool basicBendMode() const;
qreal cpDist() const;
void setBasicBendMode(bool mode);
void setBend(int bend);
void setInAngle(int inAngle);
void setOutAngle(int outAngle);
void setWeight(qreal weight);
void reverse();
int tikzLine() const;
void setTikzLine(int tikzLine);
void attachStyle();
QString styleName() const;
void setStyleName(const QString & styleName);
Style *style() const;
signals:
public slots:
private:
QPointF bezierTangent(qreal start, qreal end) const;
QString _sourceAnchor;
QString _targetAnchor;
// owned
Node *_edgeNode;
GraphElementData *_data;
// referenced
Node *_source;
Node *_target;
Style *_style;
bool _dirty;
bool _basicBendMode;
int _bend;
int _inAngle;
int _outAngle;
qreal _weight;
qreal _cpDist;
QPointF _head;
QPointF _tail;
QPointF _cp1;
QPointF _cp2;
QPointF _mid;
QPointF _headTangent;
QPointF _tailTangent;
int _tikzLine;
};
#endif // EDGE_H
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