// $Id: tranform.h 751 2006-03-31 15:43:49Z alex $ /* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE ================================XARAHEADERSTART=========================== Xara LX, a vector drawing and manipulation program. Copyright (C) 1993-2006 Xara Group Ltd. Copyright on certain contributions may be held in joint with their respective authors. See AUTHORS file for details. LICENSE TO USE AND MODIFY SOFTWARE ---------------------------------- This file is part of Xara LX. Xara LX is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. Xara LX and its component source files are 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. 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Xara Group Ltd, Gaddesden Place, Hemel Hempstead, HP2 6EX, UK. http://www.xara.com/ =================================XARAHEADEREND============================ */ // The Transformation Base Classes /* */ #ifndef TRANFORM_INC #define TRANFORM_INC #include "ccobject.h" class DocCoord; /******************************************************************************************** > class TransformBase : public CCObject Author: Rik_Heywood (Xara Group Ltd) Created: 10/02/94 Purpose: The Transformation Base Class. This is an abstract class - you can only create instances of its derived classes. The Transformation classes are used to give a transparent interface to arbitary transformations on objects. Nodes do not need to be aware of what type of transformation is being applied or how is should be undone. This class contains two virtual function :- MonoOn virtual void Transform(DocCoord* Coords, INT32 NumCoords) MonoOff MonoOn virtual BOOL IsInvertable() MonoOff It also contains the following public member vars MonoOn BOOL TransLines; // TRUE if Line Widths are to be transformed MonoOff MonoOn BOOL TransFills; // TRUE if Fills are to be transformed MonoOff SeeAlso: TransInvertable; TransNonInvertable ********************************************************************************************/ class TransformBase : public CCObject { CC_DECLARE_DYNAMIC(TransformBase); public: TransformBase() { TransFills = TRUE; TransLines = TRUE; bSolidDrag = FALSE; bTransformYourChildren = TRUE; bHaveTransformedChildren = TRUE; bHaveTransformedCached = TRUE; bHaveTransformedAllChildren = FALSE; bHaveTransformedAllCached = FALSE; }; virtual void Transform( DocCoord* Coords, INT32 NumCoords) = 0; virtual BOOL IsInvertable() = 0; virtual BOOL IsTranslation() {return FALSE;} // Other functions virtual FIXED16 GetScalar(); // vars public: BOOL TransFills : 1; // Should the Fills be transformed BOOL TransLines : 1; // Should the line widths be transformed BOOL bSolidDrag : 1; // Should the object update itself fully so it can be rendered? BOOL bTransformYourChildren : 1; // Should the object transform all its children (it might not need to if it can transform its cached data) BOOL bHaveTransformedChildren : 1; // Feedback from Node: Node is fully transformed, including all children BOOL bHaveTransformedCached : 1; // Feedback from Node: Node has transformed its cached data BOOL bHaveTransformedAllChildren : 1; // Feedback from Iterator: All iterated nodes returned bHaveTransformedChildren; BOOL bHaveTransformedAllCached : 1; // Feedback from Iterator: All iterated nodes returned bHaveTransformedCached; }; /******************************************************************************************** > class TransInvertable : public TransformBase Author: Rik_Heywood (Xara Group Ltd) Created: 10/02/94 Purpose: One of the transformation base classes. All Transformations derived from this class can be inverted directly. ie Transforms that make use of a matrix can be inverted by inverting the matrix. This class adds the following virtual functions :- MonoOn virtual void Invert() MonoOff SeeAlso: Trans2DMatrix ********************************************************************************************/ class TransInvertable : public TransformBase { CC_DECLARE_DYNAMIC(TransInvertable); public: TransInvertable(){}; virtual BOOL IsInvertable() { return TRUE; } virtual void Invert() = 0; }; /******************************************************************************************** > class TransNonInvertable : public TransformBase Author: Rik_Heywood (Xara Group Ltd) Created: 10/02/94 Purpose: One of the Transformation base classes. All the transformations derived from this class can not be inverted. Transforms of this kind are considered to be one way mappings from the original coords. There is no way of getting the original coords back after they have been transformed by a class derived from this one. Examples include the Envelope transformation ********************************************************************************************/ class TransNonInvertable : public TransformBase { CC_DECLARE_DYNAMIC(TransNonInvertable); public: TransNonInvertable(){}; virtual BOOL IsInvertable() { return FALSE; } }; #endif // TRANFORM_INC