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135 lines
4.3 KiB
135 lines
4.3 KiB
/*
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This file is part of Kig, a KDE program for Interactive Geometry...
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Copyright (C) 2002 Dominique Devriese <devriese@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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USA
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*/
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#ifndef KIG_MISC_COORDINATE_SYSTEM_H
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#define KIG_MISC_COORDINATE_SYSTEM_H
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#include <tqnamespace.h>
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class KigPainter;
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class KigDocument;
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class KigWidget;
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class CoordinateSystem;
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class TQValidator;
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class Coordinate;
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class TQString;
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class TQStringList;
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class TQWidget;
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/**
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* a factory to build a CoordinateSystem and a small handle to the
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* existant CoordinateSystem's...
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*/
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class CoordinateSystemFactory
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{
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public:
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enum { Euclidean = 0, Polar = 1 };
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static TQStringList names();
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static TQString setCoordinateSystemStatement( int id );
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static CoordinateSystem* build( int which );
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static CoordinateSystem* build( const char* type );
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};
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/**
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* a CoordinateSystem is what the user sees: it is kept by KigPart to
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* show the user a grid, and to show the coordinates of points... it
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* allows for weird CoordinateSystem's like homogeneous or
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* projective...
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* internally, it does nothing, it could almost have been an ordinary
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* Object..., mapping coordinates from and to the screen to and from
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* the internal coordinates is done elsewhere ( KigPainter and
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* KigWidget... )
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*/
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class CoordinateSystem
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: public TQt
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{
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public:
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CoordinateSystem();
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virtual ~CoordinateSystem();
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virtual TQString fromScreen ( const Coordinate& pt, const KigDocument& w ) const = 0;
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/**
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* This returns a notice to say in which format coordinates should
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* be entered. This should be something like:
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* i18n( "Enter coordinates in the following form: \"(x,y)\", where
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* x is the x coordinate, and y is the y coordinate." );
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*/
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virtual TQString coordinateFormatNotice() const = 0;
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/**
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* Like \ref coordinateFormatNotice(), but with HTML tags useful to
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* have a rich text...
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*/
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virtual TQString coordinateFormatNoticeMarkup() const = 0;
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virtual Coordinate toScreen (const TQString& pt, bool& ok) const = 0;
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virtual void drawGrid ( KigPainter& p, bool showgrid = true,
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bool showaxes = true ) const = 0;
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virtual TQValidator* coordinateValidator() const = 0;
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virtual Coordinate snapToGrid( const Coordinate& c,
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const KigWidget& w ) const = 0;
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virtual const char* type() const = 0;
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virtual int id() const = 0;
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};
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class EuclideanCoords
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: public CoordinateSystem
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{
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public:
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EuclideanCoords();
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~EuclideanCoords();
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TQString fromScreen( const Coordinate& pt, const KigDocument& w ) const;
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TQString coordinateFormatNotice() const;
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TQString coordinateFormatNoticeMarkup() const;
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Coordinate toScreen (const TQString& pt, bool& ok) const;
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void drawGrid ( KigPainter& p, bool showgrid = true,
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bool showaxes = true ) const;
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TQValidator* coordinateValidator() const;
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Coordinate snapToGrid( const Coordinate& c,
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const KigWidget& w ) const;
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const char* type() const;
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int id() const;
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};
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class PolarCoords
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: public CoordinateSystem
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{
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void drawGridLine( KigPainter& p, const Coordinate& center,
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double radius ) const;
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public:
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PolarCoords();
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~PolarCoords();
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TQString fromScreen( const Coordinate& pt, const KigDocument& w ) const;
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TQString coordinateFormatNotice() const;
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TQString coordinateFormatNoticeMarkup() const;
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Coordinate toScreen (const TQString& pt, bool& ok) const;
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void drawGrid ( KigPainter& p, bool showgrid = true,
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bool showaxes = true ) const;
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TQValidator* coordinateValidator() const;
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Coordinate snapToGrid( const Coordinate& c,
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const KigWidget& w ) const;
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const char* type() const;
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int id() const;
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};
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#endif
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