// $Id: snap.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 Snap class - used to do all types of snapping in Camelot #ifndef INC_SNAP #define INC_SNAP class Spread; class DocView; class DocCoord; class DocRect; class Node; class Layer; class Path; enum GuidelineType { GUIDELINE_NOTYPE, GUIDELINE_HORZ, GUIDELINE_VERT }; /******************************************************************************************** > class CSnap : public CC_CLASS_MEMDUMP Author: Mark_Neves (Xara Group Ltd) Created: 20/9/94 Purpose: Performs the snapping required by Camelot ********************************************************************************************/ class CSnap : public CC_CLASS_MEMDUMP { CC_DECLARE_MEMDUMP(CSnap); public: CSnap(DocView* pThisDocView,Spread* pThisSpread); // General snap functions of DocView. BOOL Snap(DocCoord* pDocCoord, BOOL TryMagSnap = TRUE, BOOL TryGridSnap = TRUE); BOOL Snap(DocRect* pDocRect, const DocCoord& PrevCoord, const DocCoord& CurCoord); BOOL TryToSnapToObject(Node* pNode, DocCoord* pDocCoord); BOOL SnapToGrids(DocCoord* pDocCoord); void SetSpread(Spread* pThisSpread) { pSpread = pThisSpread; } static MILLIPOINT GetSnapDist() { return SnapDist; } static MILLIPOINT GetSnapToCoordDist() { return SnapToCoordDist; } static BOOL SnapCoordToPath(DocCoord* pDocCoord, Path* pPath); static BOOL SnapRectToRect(DocRect* pSnappedRect, const DocRect& RefRect); private: // Internal snap-to-grid funcs BOOL SnapToGrids(DocRect* pDocRect, const DocCoord& PrevCoord, const DocCoord& CurCoord); // Internal snap-to-objects funcs // if Magnetic is TRUE, only magnetic objects are snapped to, otherwise all objects are snapped to. BOOL SnapToObjects(Node* pRootNode,DocCoord* pDocCoord,BOOL Magnetic,BOOL GuideLayersOnly); BOOL SnapToObjects(DocRect* pDocRect, const DocCoord& PrevCoord, const DocCoord& CurCoord, BOOL Magnetic,BOOL GuideLayersOnly); // Internal snap-to-guidelines funcs BOOL SnapToGuidelines(DocCoord* pDocCoord,GuidelineType Type = GUIDELINE_NOTYPE); BOOL SnapToGuidelines(DocRect* pDocRect,const DocCoord& PrevCoord,const DocCoord& CurCoord); BOOL SnapToGuidesInLayer(Layer* pLayer,DocCoord* pDocCoord,GuidelineType Type); // Internal snap-to-guide-objects funcs BOOL SnapToGuideObjects(DocCoord* pDocCoord); BOOL SnapToGuideObjects(DocRect* pDocRect,const DocCoord& PrevCoord,const DocCoord& CurCoord); // Internal snap-to-pages funcs BOOL SnapToPages(DocCoord* pDocCoord); BOOL SnapToPages(DocRect* pDocRect,const DocCoord& PrevCoord,const DocCoord& CurCoord); // Internal snap-to-value function static BOOL SnapToValue(const INT32 RefValue, INT32* pTestValue, INT32* pLockedValue); private: void CalcSnapDist(); DocView* pDocView; Spread* pSpread; Node* pLastSnappingObject; // This is how close a point needs to be to a shape before it can snap to it // It is relative to the scale factor of the CSnap object's DocView, and is calculated // when the CSnap object is constructed static MILLIPOINT SnapDist; static MILLIPOINT SnapToCoordDist; // This flag controls the snapping of points to the pages in the relevant spread // Page boundary snapping will only occur when 'snap to objects' is turned on. static BOOL TrySnapToPages; }; #endif // INC_SNAP