// $Id: extender.h 1282 2006-06-09 09:46:49Z 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============================ */ // #ifndef INC_EXTENDER #define INC_EXTENDER //#include "doccoord.h" // for DocCoord member variables - in camtypes.h [AUTOMATICALLY REMOVED] // types of extend-action. static const BYTE X_EXTEND = 1; static const BYTE Y_EXTEND = 2; static const BYTE X_STRETCH = 4; static const BYTE Y_STRETCH = 8; // an extend buffer-zone constant, in DocCoord units (millipoints). // points on or within this distance from the centre-point must not extend out. static const INT32 EXT_EXPAND_BUFFER = 10; // an extend shrinking buffer-zone constant. this must be 1mp bigger than the expanding // buffer-zone, so that coords are never shrunk down to be next to that zone. this is // because rounding errors may arbitrarily shift coords by 1mp, thus making previously // valid points invariant under expansion. static const INT32 EXT_SHRINK_BUFFER = EXT_EXPAND_BUFFER + 1; /******************************************************************************************** > class ExtendParams : public CC_CLASS_MEMDUMP Author: Karim_MacDonald (Xara Group Ltd) Created: 10/09/1999 Purpose: Parameter container for extension operation. See also: ********************************************************************************************/ class ExtendParams : public CC_CLASS_MEMDUMP { // Declare the class for memory tracking CC_DECLARE_MEMDUMP(ExtendParams); public: // default and copy constructor. ExtendParams() {} ExtendParams(const ExtendParams& other) { fExtendFlags = other.fExtendFlags; xinc = other.xinc; xdec = other.xdec; yinc = other.yinc; ydec = other.ydec; doccEndCentre = other.doccEndCentre; doccStartCentre = other.doccStartCentre; doccOffset = other.doccOffset; xscale = other.xscale; yscale = other.yscale; doccScaleStart = other.doccScaleStart; doccScaleEnd = other.doccScaleEnd; xincExtendBuffer= other.xincExtendBuffer; xdecExtendBuffer= other.xdecExtendBuffer; yincExtendBuffer= other.yincExtendBuffer; ydecExtendBuffer= other.ydecExtendBuffer; pOp = other.pOp; } // data. BYTE fExtendFlags; // the type of extending required. INT32 xinc; // displacement of points in the positive x-direction INT32 xdec; // displacement of points in the negative x-direction INT32 yinc; // displacement of points in the positive y-direction INT32 ydec; // displacement of points in the negative y-direction DocCoord doccEndCentre; // end-centre of extension; defines extension limits. DocCoord doccStartCentre; // start-centre of extension; defines extension behaviour. DocCoord doccOffset; // the displacement vector from start- to end- centres. double xscale; // x-direction scaling factor double yscale; // y-direction scaling factor DocCoord doccScaleStart; // the scaling origin of the Node. DocCoord doccScaleEnd; // the result of transforming doccScaleStart. INT32 xincExtendBuffer; // the size of the dead zone in the +ve x-direction. INT32 xdecExtendBuffer; // the size of the dead zone in the -ve x-direction. INT32 yincExtendBuffer; // the size of the dead zone in the +ve y-direction. INT32 ydecExtendBuffer; // the size of the dead zone in the -ve y-direction. UndoableOperation * pOp; }; /******************************************************************************************** > class Extender : public CC_CLASS_MEMDUMP Author: Karim_MacDonald (Xara Group Ltd) Created: 10/09/1999 Purpose: Preliminary container class for Extend() function. This performs automatic extension and stretching of nodes. Stretching is defined as application of a matrix transformation to control points, causing the points to scale and translate. The distance a point is moved depends on its own distance from some centre - think 'x -> ax+b'. Extension is defined as translation of control points, depending on their initial position. All points are moved by the same fixed amount, although the *direction* follows the same rules as for stretching - 'x -> x +/- delta'. See also: ********************************************************************************************/ class Extender : public CC_CLASS_MEMDUMP { // Declare the class for memory tracking CC_DECLARE_MEMDUMP(Extender); public: static DocRect CheckValidExtend(NodeRenderableInk* pNode, BYTE fExtendFlags, const DocRect& drTriggerRelation, const DocRect& drTargetRelation, const DocRect& drThisTrigger, const DocRect& drLastTrigger, const DocRect& drLastTarget, BOOL * pOK = NULL, const BOOL ExtendAroundTarget = FALSE); static void Extend( NodeRenderableInk* pNode, BYTE fExtendFlags, const DocRect& drTriggerRelation, const DocRect& drTargetRelation, const DocRect& drNewTrigger, const DocRect& drLastTrigger, const DocRect& drLastTarget, const DocRect* pdrDifference = NULL, const BOOL ExtendAroundTarget = FALSE, UndoableOperation * pOp = NULL); static BOOL ConvertQuickShapesInSelRangeToPaths( UndoableOperation* pUndoOp, Range* pRange ); static BOOL CheckValidExtend( NodeRenderableInk* pNode, DocRect* pStartRect, DocRect* pEndRect, BYTE fStretchType, DocRect* pOldStartRect = NULL); static void Extend( NodeRenderableInk* pNode, DocRect* pStartRect, DocRect* pEndRect, BYTE fStretchType, DocRect* pOldStartRect = NULL ); static DocRect ValidateControlPoints(INT32 numPoints, const DocCoord* doccArray, const ExtendParams& ExtParams); static void CalculateExtendParams(ExtendParams* pEPS, BYTE fExtendFlags, const DocRect& drTriggerRelation, const DocRect& drTargetRelation, const DocRect& drNewTrigger, const DocRect& drLastTrigger, const DocRect& drLastTarget, const DocRect* pdrDifference = NULL, const BOOL ExtendAroundTarget = FALSE); private: static INT32 CheckInvalidShrinkingPoints(INT32 nCentre, INT32 nDelta, INT32 nOffset, INT32 nNumPoints, const DocCoord* doccArray, BOOL bExamineX); static INT32 CheckInvalidExpandingPoints(INT32 nCentre, INT32 nDelta, INT32 nOffset, INT32 nNumPoints, const DocCoord* doccArray, BOOL bExamineX); static INT32 CheckLimits(const INT32 limit, const INT32 delta, const INT32 value); }; #endif // !INC_EXTENDER