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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_NODE_H_20090903_
#define GRAPH_NODE_H_20090903_
#include <QGraphicsItem>
#include <QPicture>
#include <QSet>
#include <graphviz/cgraph.h>
#include <graphviz/gvc.h>
class QVariant;
class GraphWidget;
class GraphEdge;
constexpr int NodeZValue = 1;
constexpr int NodeWidth = 100;
constexpr int NodeHeight = 50;
constexpr int LabelFontSize = 10;
constexpr int BorderScaleFactor = 4;
class GraphNode final : public QGraphicsItem {
friend class GraphWidget;
friend class GraphEdge;
public:
GraphNode(GraphWidget *graph, const QString &text, const QColor &color = Qt::white);
GraphNode(const GraphNode &) = delete;
GraphNode &operator=(const GraphNode &) = delete;
~GraphNode() override;
public:
enum { Type = UserType + 2 };
int type() const override {
// Enable the use of qgraphicsitem_cast with this item.
return Type;
}
public:
void setFont(const QFont &font);
QFont font() const;
public:
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
QVariant itemChange(GraphicsItemChange change, const QVariant &value) override;
QRectF boundingRect() const override;
protected:
void hoverEnterEvent(QGraphicsSceneHoverEvent *e) override;
void hoverLeaveEvent(QGraphicsSceneHoverEvent *e) override;
private:
void addEdge(GraphEdge *edge);
void removeEdge(GraphEdge *edge);
void drawLabel(const QString &text);
protected:
QPicture picture_;
QColor color_;
GraphWidget *graph_ = nullptr;
QSet<GraphEdge *> edges_;
Agnode_t *node_ = nullptr;
};
#endif
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