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// Copyright (C) 2003 Dominique Devriese <devriese@kde.org>
// 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, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
// 02110-1301, USA.
#ifndef KIG_OBJECTS_LOCUS_IMP_H
#define KIG_OBJECTS_LOCUS_IMP_H
#include "curve_imp.h"
#include "../misc/object_hierarchy.h"
/**
* LocusImp is an imp that consists of a copy of the curveimp that the
* moving point moves over, and an ObjectHierarchy that can calc (
* given a point, and optionally some more tqparent objects the position
* of the moving point. The hierarchy should take the moving point as
* its *first* argument and all others after that. The others are
* used to make it possible for Locus to be updated when some of the
* other objects that appear in the path from the moving point to the
* dependent point change.
*
* This may seem rather complicated, but I think it is absolutely
* necessary to support locuses using Kig's object system. It would
* be very bad for LocusImp to have to keep references to its tqparents
* as Objects ( since only the objects know how they are related to
* their tqparents ). This is how we used to do it, but the current
* method is far superior. First and foremost because the separation
* between ObjectImp and Object is something that Kig depends on very
* much, and because every ObjectImp should contain all the data it
* needs itself. ObjectImp's are entirely independent objects.
* That's also why we don't keep a pointer to the old CurveImp, but a
* copy of it..
*
* i hope this is a bit clear, if not, feel free to ask for
* explanation of what you don't understand..
*/
class LocusImp
: public CurveImp
{
CurveImp* mcurve;
const ObjectHierarchy mhier;
double getDist(double param, const Coordinate& p, const KigDocument& doc) const;
void getInterval(double& x1,double& x2,double incr,const Coordinate& p, const KigDocument& doc) const;
double getParamofmin(double a, double b, const Coordinate& p, const KigDocument& doc) const;
public:
typedef CurveImp Parent;
static const ObjectImpType* stype();
LocusImp( CurveImp*, const ObjectHierarchy& );
~LocusImp();
LocusImp* copy() const;
ObjectImp* transform( const Transformation& ) const;
void draw( KigPainter& p ) const;
bool tqcontains( const Coordinate& p, int width, const KigWidget& ) const;
Rect surroundingRect() const;
bool inRect( const Rect& r, int width, const KigWidget& ) const;
double getParam( const Coordinate& point, const KigDocument& ) const;
const Coordinate getPoint( double param, const KigDocument& ) const;
// TODO ?
const uint numberOfProperties() const;
const QCStringList properties() const;
const QCStringList propertiesInternalNames() const;
ObjectImp* property( uint which, const KigDocument& w ) const;
const char* iconForProperty( uint which ) const;
const ObjectImpType* impRequirementForProperty( uint which ) const;
bool isPropertyDefinedOnOrThroughThisImp( uint which ) const;
const CurveImp* curve() const;
const ObjectHierarchy& hierarchy() const;
const ObjectImpType* type() const;
void visit( ObjectImpVisitor* vtor ) const;
bool equals( const ObjectImp& rhs ) const;
bool containsPoint( const Coordinate& p, const KigDocument& d ) const;
bool internalContainsPoint( const Coordinate& p, double threshold, const KigDocument& doc ) const;
};
#endif
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