strkcomp.h

Go to the documentation of this file.

// $Id: strkcomp.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.

You should have received a copy of the GNU General Public License along
with Xara LX (see the file GPL in the root directory of the
distribution); if not, write to the Free Software Foundation, Inc., 51
Franklin St, Fifth Floor, Boston, MA  02110-1301 USA


ADDITIONAL RIGHTS
-----------------

Conditional upon your continuing compliance with the GNU General Public
License described above, Xara Group Ltd grants to you certain additional
rights. 

The additional rights are to use, modify, and distribute the software
together with the wxWidgets library, the wxXtra library, and the "CDraw"
library and any other such library that any version of Xara LX relased
by Xara Group Ltd requires in order to compile and execute, including
the static linking of that library to XaraLX. In the case of the
"CDraw" library, you may satisfy obligation under the GNU General Public
License to provide source code by providing a binary copy of the library
concerned and a copy of the license accompanying it.

Nothing in this section restricts any of the rights you have under
the GNU General Public License.


SCOPE OF LICENSE
----------------

This license applies to this program (XaraLX) and its constituent source
files only, and does not necessarily apply to other Xara products which may
in part share the same code base, and are subject to their own licensing
terms.

This license does not apply to files in the wxXtra directory, which
are built into a separate library, and are subject to the wxWindows
license contained within that directory in the file "WXXTRA-LICENSE".

This license does not apply to the binary libraries (if any) within
the "libs" directory, which are subject to a separate license contained
within that directory in the file "LIBS-LICENSE".


ARRANGEMENTS FOR CONTRIBUTION OF MODIFICATIONS
----------------------------------------------

Subject to the terms of the GNU Public License (see above), you are
free to do whatever you like with your modifications. However, you may
(at your option) wish contribute them to Xara's source tree. You can
find details of how to do this at:
  http://www.xaraxtreme.org/developers/

Prior to contributing your modifications, you will need to complete our
contributor agreement. This can be found at:
  http://www.xaraxtreme.org/developers/contribute/

Please note that Xara will not accept modifications which modify any of
the text between the start and end of this header (marked
XARAHEADERSTART and XARAHEADEREND).


MARKS
-----

Xara, Xara LX, Xara X, Xara X/Xtreme, Xara Xtreme, the Xtreme and Xara
designs are registered or unregistered trademarks, design-marks, and/or
service marks of Xara Group Ltd. All rights in these marks are reserved.


      Xara Group Ltd, Gaddesden Place, Hemel Hempstead, HP2 6EX, UK.
                        http://www.xara.com/

=================================XARAHEADEREND============================
 */
// Stroke Doc-component classes.
// These store brush-stroke definitions as clipart subtrees

#ifndef INC_STRKCOMP
#define INC_STRKCOMP

//#include "doccomp.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "linecomp.h"
#include "linedef.h"
//#include "camfiltr.h" - in camtypes.h [AUTOMATICALLY REMOVED]

class BaseCamelotFilter;
class CXaraFileRecord;
class CamelotRecordHandler;
class Node;


/* NOTE: Diccon - 13/12/99.
In the implementation of the new brush objects it was decided that they should be stored and
retrieved in the same way as strokes.  Therefore a new superclass has been createed from which 
these classes are now derived as well as the brushcomponent and brushdefintion classes.
See other notes in linecomp.h for more info
*/

/********************************************************************************************

>   typedef UINT32 StrokeHandle;

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    28/2/97

    Purpose:    A StrokeHandle is a unique reference to a vector stroke in the
                StrokeComponent. All references to strokes are done via StrokeHandles,
                which allows us to delete & relocate strokes without worrying about
                leaving lots of pointers to them lying about and causing havoc.

                The special handle StrokeHandle_NoStroke is used for illegal handles
                and returning error states.

    SeeAlso:    StrokeComponent; StrokeDefinition

********************************************************************************************/

typedef UINT32 StrokeHandle;

const StrokeHandle StrokeHandle_NoStroke = 0xffffffff;



/********************************************************************************************

>   class StrokeDefinition : public LineDefinition

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    28/2/97

    Purpose:    Stores a vector stroke definition
                A static list of these items is held in the StrokeComponent.

    SeeAlso:    StrokeComponent

********************************************************************************************/

class StrokeDefinition : public LineDefinition
{
CC_DECLARE_DYNAMIC(StrokeDefinition)

public:
    StrokeDefinition()  { ERROR3("Don't use this constructor"); };
    StrokeDefinition(Node *pStrokeTree, BOOL repeating = FALSE, INT32 repeats = 0);
//  StrokeDefinition(Node *pStrokeTree, MILLIPOINT StartCap, MILLIPOINT EndCap);

    ~StrokeDefinition();

    void SetStrokeName(StringBase *pName);
    void SetStrokeRepeating(BOOL Repeating);
    void SetNumStrokeRepeats(INT32 NumRepeats);
    void SetOverrideFill(BOOL Override)     { OverridesFill  = Override; };
    void SetOverrideTrans(BOOL Override)    { OverridesTrans = Override; };

public:
    virtual BOOL IsDifferent(LineDefinition *pOther);
            // Returns TRUE if these stroke definitions are not the same

    inline Node *GetStrokeTree(void)        { return(pStroke); };
            // Get at the stroke clipart tree

    inline String_32 *GetStrokeName(void)   { return(&Name); };

    inline BOOL IsRepeating(void) const     { return(Repeating); };
            // Determine if this stroke should repeat or stretch onto the destination path

    inline INT32 NumRepeats(void) const     { return(Repeats); };
            // Determine if this stroke should repeat or stretch onto the destination path

    inline BOOL OverrideFill(void) const    { return(OverridesFill); };
    inline BOOL OverrideTrans(void) const   { return(OverridesTrans); };
            // Determine if this stroke overrides the fill/transparency geometry with its own ones

    BOOL NeedsTransparency(void) const;
            // Determine if this stroke needs transparency to render correctly

    inline void  SetIOStore(UINT32 NewValue)        { IOStore = NewValue; };
    inline UINT32 ReadIOStore(void) const       { return(IOStore); };

private:
    Node *pStroke;              // A clipart subtree which defines the stroke

    String_32 Name;             // The name of this stroke (as shown in stroke gallery)

    INT32 Repeats;              // Number of times a brush should repeat along the stroke, or zero for optimal
    BOOL Repeating;             // TRUE if the stroke should repeat along the path, FALSE if it should stretch
    BOOL OverridesFill;         // TRUE if the stroke uses its own fills rather than the current fill colour
    BOOL OverridesTrans;        // TRUE if the stroke uses its own transparencies rather than the current one

    BOOL NeedsTrans;            // TRUE if the stroke needs transparency in order to render

    UINT32 IOStore;             // Used during export to indicate whether this definition has been saved
                                // Used during import to store the handle associated with this stroke
                                // in the file, so we can re-map handles into our array on import.
};



/********************************************************************************************

>   class StrokeComponentClass : public DocComponentClass

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    22/2/97
    Purpose:    The class that gets a Stroke doc component going on start up
                We need to register our class as a document component and this is where
                we do it all.
    SeeAlso:    DocComponentClass

********************************************************************************************/

class StrokeComponentClass : public DocComponentClass
{
CC_DECLARE_DYNAMIC(StrokeComponentClass)

public:
    static BOOL Init();
    static void DeInit();

public:
    BOOL AddComponent(BaseDocument *pDoc);
};



/********************************************************************************************

>   class StrokeComponent : public DocComponent

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    22/2/97

    Purpose:    A document component for handling Stroke definitions.

                StrokeComponents share a global cache of available stroke types.
                Individual instances serve as managers for the list, mainly providing
                import/export facilities for stroke definitions.

    SeeAlso:    DocComponent

********************************************************************************************/

class StrokeComponent : public DocComponent
{
friend class StrokeComponentClass;
friend class StrokeDefinition;

CC_DECLARE_DYNAMIC(StrokeComponent)

public:
    StrokeComponent();
    virtual ~StrokeComponent();


protected:      // Internal functions for friend classes
    static void DeleteStrokeList(void);
                // One-time deinitialisation, called on exit

public:
    static StrokeHandle AddNewStroke(StrokeDefinition *pStroke);
                // Add a new stroke definition to the global list

    static StrokeDefinition *FindStroke(StrokeHandle Handle);
                // Finds the definition of a given stroke

public:         // External V2 native file import/export handlers
    virtual BOOL StartImport(BaseCamelotFilter *pFilter);
    virtual BOOL EndImport(BaseCamelotFilter *pFilter, BOOL Success);
    virtual BOOL StartExport(BaseCamelotFilter *pFilter);
    virtual BOOL EndExport(BaseCamelotFilter *pFilter, BOOL Success);


public:         // Internal file format handlers - called from our RecordHandler in strkattr.cpp
    static BOOL StartImportStroke(CamelotRecordHandler *pHandler, CXaraFileRecord *pRecord);
    static BOOL EndImportStroke(CamelotRecordHandler *pHandler);
                // Starts and completes import of the Atomic stroke definition

    static StrokeHandle FindImportedStroke(UINT32 ImportedHandle);
                // Finds the internal handle of the stroke definition with the given imported handle

    static BOOL ExportStroke(BaseCamelotFilter *pFilter, StrokeHandle Handle);
                // Exports a stroke definition (if necessary)


private:            // Global Stroke list & management functions
    static BOOL ExpandArray(void);

private:
    static StrokeDefinition **pStrokeList;  // Global array of available stroke definitions
    static UINT32 CurrentSize;              // Number of entries allocated to the array
    static UINT32 Used;                     // Number of entries used in the array (index of 1st free slot)

private:            // Import records
    static UINT32 ImportHandle;             // Record the data associated with the record currently 
    static UINT32 ImportFlags;              // being imported
    static UINT32 ImportData1;
    static UINT32 ImportData2;
    static InsertTreeContext *pImportPreviousContext;
    static Node  *pImportNewBrush;
    static String_32 ImportedName;
};



#endif

---