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/* This file is part of the KDE project
Copyright (C) 2001 Thomas Zander zander@kde.org
Copyright (C) 2004 Dag Andersen <danders@get2net.dk>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef KPTRELATION_H
#define KPTRELATION_H
#include "kptduration.h"
#include <tqstring.h>
class TQCanvas;
class TQDomElement;
namespace KPlato
{
class Node;
class Project;
class PertCanvas;
/**
* The relation class couples a 2 nodes together which are dependent on each other.
* If for example you have a project to build a house, the node that represents the
* adding of the roof is dependent on the node that represents the building of the walls.
* The roof can't be put up if the walls are not there yet.
* We actually have a number of relationtypes so this relation can be used in different manners.
*/
class Relation {
public:
enum Type { FinishStart, FinishFinish, StartStart };
Relation(Node *parent, Node *child, Type type, Duration lag);
Relation(Node *parent=0, Node *child=0, Type type=FinishStart);
Relation(Relation *rel);
/**
* When deleted the relation will remove itself from
* the parent- and child nodes lists
*/
virtual ~Relation();
void setType(Type );
Type type() const { return m_type; }
/** returns the lag.
* The lag of a relation is the time it takes between the parent starting/stopping
* and the start of the child.
*/
const Duration &lag() const { return m_lag; }
void setLag(Duration lag) { m_lag = lag; }
/**
* @return The parent dependent node.
*/
Node *parent() const { return m_parent; }
/**
* @return The child dependent node.
*/
Node *child() const { return m_child; }
enum Result {
SUCCESS = 0l,
HASCHILDREN = 1l,
NOTIMPL = 2l
};
bool load(TQDomElement &element, Project &project);
void save(TQDomElement &element) const;
protected: // variables
Node *m_parent;
Node *m_child;
Type m_type;
Duration m_lag;
private:
TQString m_parentId;
#ifndef NDEBUG
public:
void printDebug(TQCString indent);
#endif
};
class ProxyRelation : public Relation
{
public:
ProxyRelation(Node *parent, Node *child, Relation::Type type, Duration lag)
: Relation(parent, child, type, lag)
{}
~ProxyRelation() { m_parent = 0; m_child = 0;}
};
} //KPlato namespace
#endif
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