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//-*-C++-*-
/*
**************************************************************************
description
--------------------
copyright : (C) 2000-2001 by Andreas Zehender
email : zehender@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. *
* *
**************************************************************************/
#ifndef PMCOMPOBJECT_H
#define PMCOMPOBJECT_H
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "pmobject.h"
/**
* Base class for all povray objects that can have child objects.
*
* Used pattern: Composite
*/
class PMCompositeObject : public PMObject
{
typedef PMObject Base;
public:
/**
* Creates an empty PMCompositeObject
*/
PMCompositeObject( PMPart* part );
/**
* Copy constructor
*/
PMCompositeObject( const PMCompositeObject& o );
/**
* Deletes the object and all children.
*/
virtual ~PMCompositeObject( );
/** */
virtual PMMetaObject* metaObject( ) const;
/** */
virtual void cleanUp( ) const;
/**
* Returns a pointer to the first child.
*/
virtual PMObject* firstChild( ) const { return m_pFirstChild; }
/**
* Returns a pointer to the last child.
*/
virtual PMObject* lastChild( ) const { return m_pLastChild; }
/**
* Returns a pointer to the child object at position index,
* or null if the index is out of range.
*/
virtual PMObject* childAt( uint index ) const;
/**
* Returns true if the object contains the child object o
*/
virtual bool containsChild( PMObject* o ) const
{ return ( ( PMObject* )this == o->parent( ) ); }
/**
* Returns the index of the object or -1 if not found
*/
virtual int findChild( PMObject* o );
/**
* Inserts the object as child at index i.
* If i is -1, the object is appended.
* Returns true if successful.
*/
virtual bool insertChild( PMObject* o, int i );
/**
* Inserts the object as child after the child object after
*/
virtual bool insertChildAfter( PMObject* object, PMObject* after );
/**
* Inserts the object as child before the child object before
*/
virtual bool insertChildBefore( PMObject* object, PMObject* before );
/**
* Appends the object as child. Returns true if successful.
*/
virtual bool appendChild( PMObject* );
/**
* Returns the number of children.
*/
virtual int countChildren( ) const;
/**
* Removes a child object. Does not delete it!
* Returns true if successful.*/
virtual bool takeChild( PMObject* o );
/**
* Removes a child object at index i. Does not delete it!
*/
virtual bool takeChild( uint i );
/** */
virtual void serialize( QDomElement& e, QDomDocument& doc ) const;
/**
* Returns the number of selected child items. All selected items in
* any depth are counted
*/
virtual int selectedChildren( ) const { return m_selectedChildren; }
/**
* Deselects recursively all child objects
*/
virtual void deselectChildren( );
/**
* Returns the view structure of the object.
*
* If the view structure has changed since the last call, the
* structure is created or updated, or the default view structure
* is used.
*
* If the default view structure can't be used, this function calls
* createViewStructure, which has to create a non default view structure.
*/
virtual PMViewStructure* viewStructure( );
protected:
/**
* Adds num to the number of selected objects in this object and all
* parent objects. num can be negative.
*/
virtual void adjustSelectedChildren( int num );
/**
* Returns the default view structure for the object. This view
* structure can be shared between all objects of this type.
*
* Only the data can be shared, NOT the pointer!!!
*
* The default view structure has to be created when this function
* is called first.
*/
virtual PMViewStructure* defaultViewStructure( ) const { return 0; }
/**
* Returns a key that represents the view structure parameter.
*
* Each time a view structure parameter is changed (=detail level),
* this key has to be incremented.
*/
virtual int viewStructureParameterKey( ) const { return 0; }
/**
* Returns true if the objects attributes are default and the default
* view structure can be used
*/
virtual bool isDefault( ) { return false; }
/**
* The object has to create or update a non default view structure
*/
virtual void createViewStructure( ) { };
/**
* Calls setViewStructureChanged( ) for the memento (if one has been created)
* and marks the current view structure as outdated.
*/
void setViewStructureChanged( );
/**
* The view structure.
*/
PMViewStructure* m_pViewStructure;
private:
/**
* Pointer to the first child
*/
PMObject* m_pFirstChild;
/**
* Pointer to the last child
*/
PMObject* m_pLastChild;
/**
* number of selected child items.
*/
int m_selectedChildren;
/**
* The modify flag for the view structure
*/
bool m_bViewStructureChanged;
static PMMetaObject* s_pMetaObject;
};
#endif
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