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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 PMCONTROLPOINT_H
#define PMCONTROLPOINT_H
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "pmvector.h"
#include <qptrlist.h>
#include <qstring.h>
class KConfig;
/**
* Interface between the graphical views and the PMObject.
*
* PMControlPoint is the interface between graphical view and PMObjects that
* can be changed graphically with the mouse. A @ref PMObject has a
* PMControlPoint for each changeable attribute.
*
* There is one subclass for each change behavior like 3dpoint, normal vector,
* radius, rotation ...
*
* Each control point has an id to be indentified by the PMObject. The id has
* to be unique within a PMObject.
*/
class PMControlPoint
{
public:
/**
* Creates a PMControlPoint with an id and a description.
*/
PMControlPoint( int id, const QString& description );
/**
* Deletes the PMControlPoint
*/
virtual ~PMControlPoint( );
/**
* Starts a graphical change at 3d cursor position startPoint. viewNormal
* is the normal vector of the view
*/
void startChange( const PMVector& startPoint, const PMVector& viewNormal );
/**
* Graphical change with 3d end cursor position endPoint
*/
void change( const PMVector& endPoint );
/**
* Snaps the control point to the grid
*/
virtual void snapToGrid( ) = 0;
/**
* 3d coordinates of the control point for rendering*/
virtual PMVector position( ) const { return PMVector( ); }
/**
* Returns true if the point should be displayed (rendered)
*/
virtual bool display( ) const { return true; }
/**
* Returns the id of the control point
*/
int id( ) const { return m_id; }
/**
* Type of the control point
*
* CPPoint: The control point is displayed as point, the mouse cursor
* has to be over the control point to be active (e.g. 3DControlPoint)
*
* CPCross: The control point is displayed as cross, the control point
* can be changed with the mouse in the whole view (e.g. Translation)
*/
enum PMCPDisplayType { CPPoint = 0, CPCross = 1 };
/**
* Returns the type of the control point (see @ref PMCPDisplayType)
*/
virtual PMCPDisplayType displayType( ) const { return CPPoint; };
/**
* Returns the description
*/
QString description( ) const { return m_description; }
/**
* Selects/deselects the control point
*/
void setSelected( bool yes ) { m_bSelected = yes; }
/**
* Returns true if the control point is selected
*/
bool selected( ) const { return m_bSelected; }
/**
* Returns true, if the control point was changed and sets the
* changed flag to false.
*/
bool changed( );
/**
* Returns true if an extra line should be displayed in addition to
* the view structure
*/
virtual bool hasExtraLine( ) const { return false; }
/**
* Returns the start point of the extra line
*/
virtual PMVector extraLineStart( ) const { return PMVector( 0, 0, 0 ); }
/**
* Returns the end point of the extra line
*/
virtual PMVector extraLineEnd( ) const { return PMVector( 0, 0, 0 ); }
/**
* Returns the grid distance for 3d points, vectors and movements
*/
static double moveGrid( ) { return s_moveGrid; }
/**
* Sets the grid distance
*/
static void setMoveGrid( double d );
/**
* Returns the grid distance rotations
*/
static double rotateGrid( ) { return s_rotateGrid; }
/**
* Sets the grid distance
*/
static void setRotateGrid( double d );
/**
* Returns the grid distance for scales
*/
static double scaleGrid( ) { return s_scaleGrid; }
/**
* Sets the grid distance
*/
static void setScaleGrid( double d );
static void saveConfig( KConfig* cfg );
static void restoreConfig( KConfig* cfg );
protected:
/**
* Called when a graphical change was started
*/
virtual void graphicalChangeStarted( ) = 0;
/**
* Called when the control point was changed
*/
virtual void graphicalChange( const PMVector& startPoint,
const PMVector& viewNormal,
const PMVector& endPoint ) = 0;
/**
* Sets the changed flag
*/
void setChanged( ) { m_bChanged = true; }
private:
int m_id;
PMVector m_startPoint;
PMVector m_normalVector;
bool m_bChanged;
bool m_bSelected;
QString m_description;
static double s_moveGrid;
static double s_rotateGrid;
static double s_scaleGrid;
};
typedef QPtrList<PMControlPoint> PMControlPointList;
typedef QPtrListIterator<PMControlPoint> PMControlPointListIterator;
#endif
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