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- // $Id: GraphEdge.h,v 1.17 1998/08/02 14:36:49 zeller Exp $
- // GraphEdge Class
-
- // Copyright (C) 1995 Technische Universitaet Braunschweig, Germany.
- // Written by Andreas Zeller <zeller@ips.cs.tu-bs.de>.
- //
- // This file is part of DDD.
- //
- // DDD 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.
- //
- // DDD 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 DDD -- see the file COPYING.
- // If not, write to the Free Software Foundation, Inc.,
- // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- //
- // DDD is the data display debugger.
- // For details, see the DDD World-Wide-Web page,
- // `http://www.cs.tu-bs.de/softech/ddd/',
- // or send a mail to the DDD developers <ddd@ips.cs.tu-bs.de>.
-
- #ifndef _DDD_GraphEdge_h
- #define _DDD_GraphEdge_h
-
- #ifdef __GNUG__
- #pragma interface
- #endif
-
- #include "UniqueId.h"
- #include "Box.h"
- #include "bool.h"
- #include "GraphGC.h"
- #include "TypeInfo.h"
- #include "assert.h"
-
- class GraphEdge {
- public:
- DECLARE_TYPE_INFO
-
- friend class Graph;
- friend class GraphNode;
-
- private:
- UniqueId _id; // Id
-
- GraphNode *_from; // Source
- GraphNode *_to; // Target
-
- bool _hidden; // Flag: is edge hidden?
-
- // maintained by GraphNode
- // circular lists
- GraphEdge *_nextFrom; // next Edge e with e->_from == this->_from
- GraphEdge *_nextTo; // next Edge e with e->_to == this->_to
-
- GraphEdge *_prevFrom; // prev Edge e with e->_from == this->_from
- GraphEdge *_prevTo; // prev Edge e with e->_to == this->_to
-
- // maintained by Graph
- GraphEdge *next; // For collectors
- GraphEdge *prev;
- Graph *graph;
-
- GraphEdge& operator = (const GraphEdge&) { assert(0); return *this; }
-
- protected:
- // Graphics
- virtual void _draw(Widget w,
- const BoxRegion& exposed,
- const GraphGC& gc) const = 0;
-
- // Enqueue in node lists
- void enqueue();
-
- // Dequeue from node lists
- void dequeue();
-
- // Copy Constructor
- GraphEdge(const GraphEdge& edge):
- _id(),
- _from(0),
- _to(0),
- _hidden(edge._hidden),
- _nextFrom(0),
- _nextTo(0),
- _prevFrom(0),
- _prevTo(0),
- next(0),
- prev(0),
- graph(0)
- {}
-
- public:
- // Constructor
- GraphEdge(GraphNode *f, GraphNode *t):
- _id(),
- _from(f), _to(t),
- _hidden(false),
- _nextFrom(0), _nextTo(0),
- _prevFrom(0), _prevTo(0),
- next(0), prev(0), graph(0)
- {}
-
- // Destructor
- virtual ~GraphEdge() {}
-
- // Duplication
- virtual GraphEdge *dup() const = 0;
-
- // Resources
- GraphNode *from() const { return _from; }
- GraphNode *to() const { return _to; }
- unsigned long id() const { return _id; }
-
- bool& hidden() { return _hidden; }
- bool hidden() const { return _hidden; }
-
- // Graphics
- void draw(Widget w, const BoxRegion& exposed = BoxRegion(BoxPoint(0, 0),
- BoxSize(INT_MAX, INT_MAX)), const GraphGC& gc = GraphGC()) const
- {
- if (!_hidden)
- _draw(w, exposed, gc);
- }
-
- // Printing
- virtual void _print(ostream& os, const GraphGC& gc) const;
-
- // Region occupied by edge - if none, BoxRegion()
- virtual BoxRegion region(const GraphGC&) const { return BoxRegion(); }
-
- // Representation invariant
- virtual bool OK() const;
- };
-
- extern ostream& operator << (ostream& s, GraphEdge& e);
-
- #endif // _DDD_GraphEdge_h
- // DON'T ADD ANYTHING BEHIND THIS #endif
-