00001 // $Id: extender.h 1282 2006-06-09 09:46:49Z alex $ 00002 /* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE 00003 ================================XARAHEADERSTART=========================== 00004 00005 Xara LX, a vector drawing and manipulation program. 00006 Copyright (C) 1993-2006 Xara Group Ltd. 00007 Copyright on certain contributions may be held in joint with their 00008 respective authors. See AUTHORS file for details. 00009 00010 LICENSE TO USE AND MODIFY SOFTWARE 00011 ---------------------------------- 00012 00013 This file is part of Xara LX. 00014 00015 Xara LX is free software; you can redistribute it and/or modify it 00016 under the terms of the GNU General Public License version 2 as published 00017 by the Free Software Foundation. 00018 00019 Xara LX and its component source files are distributed in the hope 00020 that it will be useful, but WITHOUT ANY WARRANTY; without even the 00021 implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 00022 See the GNU General Public License for more details. 00023 00024 You should have received a copy of the GNU General Public License along 00025 with Xara LX (see the file GPL in the root directory of the 00026 distribution); if not, write to the Free Software Foundation, Inc., 51 00027 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 00028 00029 00030 ADDITIONAL RIGHTS 00031 ----------------- 00032 00033 Conditional upon your continuing compliance with the GNU General Public 00034 License described above, Xara Group Ltd grants to you certain additional 00035 rights. 00036 00037 The additional rights are to use, modify, and distribute the software 00038 together with the wxWidgets library, the wxXtra library, and the "CDraw" 00039 library and any other such library that any version of Xara LX relased 00040 by Xara Group Ltd requires in order to compile and execute, including 00041 the static linking of that library to XaraLX. In the case of the 00042 "CDraw" library, you may satisfy obligation under the GNU General Public 00043 License to provide source code by providing a binary copy of the library 00044 concerned and a copy of the license accompanying it. 00045 00046 Nothing in this section restricts any of the rights you have under 00047 the GNU General Public License. 00048 00049 00050 SCOPE OF LICENSE 00051 ---------------- 00052 00053 This license applies to this program (XaraLX) and its constituent source 00054 files only, and does not necessarily apply to other Xara products which may 00055 in part share the same code base, and are subject to their own licensing 00056 terms. 00057 00058 This license does not apply to files in the wxXtra directory, which 00059 are built into a separate library, and are subject to the wxWindows 00060 license contained within that directory in the file "WXXTRA-LICENSE". 00061 00062 This license does not apply to the binary libraries (if any) within 00063 the "libs" directory, which are subject to a separate license contained 00064 within that directory in the file "LIBS-LICENSE". 00065 00066 00067 ARRANGEMENTS FOR CONTRIBUTION OF MODIFICATIONS 00068 ---------------------------------------------- 00069 00070 Subject to the terms of the GNU Public License (see above), you are 00071 free to do whatever you like with your modifications. However, you may 00072 (at your option) wish contribute them to Xara's source tree. You can 00073 find details of how to do this at: 00074 http://www.xaraxtreme.org/developers/ 00075 00076 Prior to contributing your modifications, you will need to complete our 00077 contributor agreement. This can be found at: 00078 http://www.xaraxtreme.org/developers/contribute/ 00079 00080 Please note that Xara will not accept modifications which modify any of 00081 the text between the start and end of this header (marked 00082 XARAHEADERSTART and XARAHEADEREND). 00083 00084 00085 MARKS 00086 ----- 00087 00088 Xara, Xara LX, Xara X, Xara X/Xtreme, Xara Xtreme, the Xtreme and Xara 00089 designs are registered or unregistered trademarks, design-marks, and/or 00090 service marks of Xara Group Ltd. All rights in these marks are reserved. 00091 00092 00093 Xara Group Ltd, Gaddesden Place, Hemel Hempstead, HP2 6EX, UK. 00094 http://www.xara.com/ 00095 00096 =================================XARAHEADEREND============================ 00097 */ 00098 // 00099 00100 #ifndef INC_EXTENDER 00101 #define INC_EXTENDER 00102 00103 //#include "doccoord.h" // for DocCoord member variables - in camtypes.h [AUTOMATICALLY REMOVED] 00104 00105 // types of extend-action. 00106 static const BYTE X_EXTEND = 1; 00107 static const BYTE Y_EXTEND = 2; 00108 static const BYTE X_STRETCH = 4; 00109 static const BYTE Y_STRETCH = 8; 00110 00111 // an extend buffer-zone constant, in DocCoord units (millipoints). 00112 // points on or within this distance from the centre-point must not extend out. 00113 static const INT32 EXT_EXPAND_BUFFER = 10; 00114 00115 // an extend shrinking buffer-zone constant. this must be 1mp bigger than the expanding 00116 // buffer-zone, so that coords are never shrunk down to be next to that zone. this is 00117 // because rounding errors may arbitrarily shift coords by 1mp, thus making previously 00118 // valid points invariant under expansion. 00119 static const INT32 EXT_SHRINK_BUFFER = EXT_EXPAND_BUFFER + 1; 00120 00121 /******************************************************************************************** 00122 00123 > class ExtendParams : public CC_CLASS_MEMDUMP 00124 00125 Author: Karim_MacDonald (Xara Group Ltd) <camelotdev@xara.com> 00126 Created: 10/09/1999 00127 Purpose: Parameter container for extension operation. 00128 See also: 00129 00130 ********************************************************************************************/ 00131 00132 class ExtendParams : public CC_CLASS_MEMDUMP 00133 { 00134 // Declare the class for memory tracking 00135 CC_DECLARE_MEMDUMP(ExtendParams); 00136 00137 public: 00138 // default and copy constructor. 00139 ExtendParams() {} 00140 ExtendParams(const ExtendParams& other) 00141 { 00142 fExtendFlags = other.fExtendFlags; 00143 xinc = other.xinc; 00144 xdec = other.xdec; 00145 yinc = other.yinc; 00146 ydec = other.ydec; 00147 doccEndCentre = other.doccEndCentre; 00148 doccStartCentre = other.doccStartCentre; 00149 doccOffset = other.doccOffset; 00150 xscale = other.xscale; 00151 yscale = other.yscale; 00152 doccScaleStart = other.doccScaleStart; 00153 doccScaleEnd = other.doccScaleEnd; 00154 xincExtendBuffer= other.xincExtendBuffer; 00155 xdecExtendBuffer= other.xdecExtendBuffer; 00156 yincExtendBuffer= other.yincExtendBuffer; 00157 ydecExtendBuffer= other.ydecExtendBuffer; 00158 pOp = other.pOp; 00159 } 00160 00161 // data. 00162 BYTE fExtendFlags; // the type of extending required. 00163 INT32 xinc; // displacement of points in the positive x-direction 00164 INT32 xdec; // displacement of points in the negative x-direction 00165 INT32 yinc; // displacement of points in the positive y-direction 00166 INT32 ydec; // displacement of points in the negative y-direction 00167 DocCoord doccEndCentre; // end-centre of extension; defines extension limits. 00168 DocCoord doccStartCentre; // start-centre of extension; defines extension behaviour. 00169 DocCoord doccOffset; // the displacement vector from start- to end- centres. 00170 double xscale; // x-direction scaling factor 00171 double yscale; // y-direction scaling factor 00172 DocCoord doccScaleStart; // the scaling origin of the Node. 00173 DocCoord doccScaleEnd; // the result of transforming doccScaleStart. 00174 INT32 xincExtendBuffer; // the size of the dead zone in the +ve x-direction. 00175 INT32 xdecExtendBuffer; // the size of the dead zone in the -ve x-direction. 00176 INT32 yincExtendBuffer; // the size of the dead zone in the +ve y-direction. 00177 INT32 ydecExtendBuffer; // the size of the dead zone in the -ve y-direction. 00178 UndoableOperation * pOp; 00179 }; 00180 00181 00182 00183 /******************************************************************************************** 00184 00185 > class Extender : public CC_CLASS_MEMDUMP 00186 00187 Author: Karim_MacDonald (Xara Group Ltd) <camelotdev@xara.com> 00188 Created: 10/09/1999 00189 Purpose: Preliminary container class for Extend() function. 00190 This performs automatic extension and stretching of nodes. 00191 00192 Stretching is defined as application of a matrix transformation to control 00193 points, causing the points to scale and translate. The distance a point is 00194 moved depends on its own distance from some centre - think 'x -> ax+b'. 00195 00196 Extension is defined as translation of control points, depending on their 00197 initial position. All points are moved by the same fixed amount, although the 00198 *direction* follows the same rules as for stretching - 'x -> x +/- delta'. 00199 See also: 00200 00201 ********************************************************************************************/ 00202 00203 class Extender : public CC_CLASS_MEMDUMP 00204 { 00205 00206 // Declare the class for memory tracking 00207 CC_DECLARE_MEMDUMP(Extender); 00208 00209 public: 00210 static DocRect CheckValidExtend(NodeRenderableInk* pNode, BYTE fExtendFlags, 00211 const DocRect& drTriggerRelation, 00212 const DocRect& drTargetRelation, 00213 const DocRect& drThisTrigger, 00214 const DocRect& drLastTrigger, 00215 const DocRect& drLastTarget, 00216 BOOL * pOK = NULL, 00217 const BOOL ExtendAroundTarget = FALSE); 00218 00219 static void Extend( NodeRenderableInk* pNode, BYTE fExtendFlags, 00220 const DocRect& drTriggerRelation, const DocRect& drTargetRelation, 00221 const DocRect& drNewTrigger, const DocRect& drLastTrigger, 00222 const DocRect& drLastTarget, const DocRect* pdrDifference = NULL, 00223 const BOOL ExtendAroundTarget = FALSE, 00224 UndoableOperation * pOp = NULL); 00225 00226 static BOOL ConvertQuickShapesInSelRangeToPaths( UndoableOperation* pUndoOp, 00227 Range* pRange ); 00228 00229 static BOOL CheckValidExtend( NodeRenderableInk* pNode, 00230 DocRect* pStartRect, 00231 DocRect* pEndRect, 00232 BYTE fStretchType, 00233 DocRect* pOldStartRect = NULL); 00234 00235 static void Extend( NodeRenderableInk* pNode, 00236 DocRect* pStartRect, 00237 DocRect* pEndRect, 00238 BYTE fStretchType, 00239 DocRect* pOldStartRect = NULL ); 00240 00241 static DocRect ValidateControlPoints(INT32 numPoints, const DocCoord* doccArray, const ExtendParams& ExtParams); 00242 00243 static void CalculateExtendParams(ExtendParams* pEPS, BYTE fExtendFlags, 00244 const DocRect& drTriggerRelation, const DocRect& drTargetRelation, 00245 const DocRect& drNewTrigger, const DocRect& drLastTrigger, 00246 const DocRect& drLastTarget, const DocRect* pdrDifference = NULL, 00247 const BOOL ExtendAroundTarget = FALSE); 00248 00249 private: 00250 static INT32 CheckInvalidShrinkingPoints(INT32 nCentre, INT32 nDelta, INT32 nOffset, 00251 INT32 nNumPoints, const DocCoord* doccArray, 00252 BOOL bExamineX); 00253 static INT32 CheckInvalidExpandingPoints(INT32 nCentre, INT32 nDelta, INT32 nOffset, 00254 INT32 nNumPoints, const DocCoord* doccArray, 00255 BOOL bExamineX); 00256 static INT32 CheckLimits(const INT32 limit, const INT32 delta, const INT32 value); 00257 }; 00258 00259 #endif // !INC_EXTENDER
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