strkattr.h

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// $Id: strkattr.h 1688 2006-08-10 12:05:20Z gerry $
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 */
// strkattr.h - Path stroking attributes

#ifndef INC_STRKATTR
#define INC_STRKATTR

//#include "attrval.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "cxfrech.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "nodeattr.h" - in camtypes.h [AUTOMATICALLY REMOVED]


class PathProcessorStroke;
class ValueFunction;
class BecomeA;

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

>   enum StrokeTypeID

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    10/1/97
    Purpose:    A unique identifier UINT32 for each predefined stroke type.
                This is used to save predefined strokes in XAR files in a minimal format

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

typedef enum
{
    StrokeType_SimpleVarWidth = 0,
} StrokeTypeID;



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

>   class StrokeTypeAttrValue : public AttributeValue

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    7/1/97

    Purpose:    StrokeType attribute value
                StrokeType attributes describe the stroking characteristics for a path

    Notes:      This AttrValue just contains a pointer to a path processor which will
                stroke paths after some given fashion. The pointer may be NULL, in which
                case new-style stroking is disabled, and old-style "lines" will be
                rendered.

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

class StrokeTypeAttrValue : public AttributeValue
{
    CC_DECLARE_DYNAMIC(StrokeTypeAttrValue)

public:         // Construction/Initialisation
    StrokeTypeAttrValue(PathProcessorStroke *pPathProcessor = NULL);
    ~StrokeTypeAttrValue();

    static BOOL Init(void);


public:         // Overridden access methods
    virtual void Render(RenderRegion *pRegion, BOOL Temp = FALSE);
    virtual void Restore(RenderRegion *pRegion, BOOL Temp);
    virtual void GoingOutOfScope(RenderRegion *pRegion);

    virtual void SimpleCopy(AttributeValue *pValue);
    virtual NodeAttribute *MakeNode();

    virtual BOOL IsDifferent(AttributeValue *pAttr);

    virtual StrokeTypeAttrValue &operator=(StrokeTypeAttrValue &Attrib);
    virtual INT32 operator==(const StrokeTypeAttrValue &Attrib);


public:     // Specialised interface
    void SetPathProcessor(PathProcessorStroke *pNewProcessor);
    PathProcessorStroke *GetPathProcessor(void) const   { return(pProcessor); };
            // Get the path processor for this stroke type (may be NULL)

    BOOL DoBecomeA(BecomeA* pBecomeA, Node* pParent);
private:
    PathProcessorStroke *pProcessor;            // Pointer to the PPS we use (if any)
};



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

>   class AttrStrokeType : public NodeAttribute

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    7/1/97

    Purpose:    StrokeType attribute
                StrokeType attributes are very simple, and merely contain a StrokeTypeAttrValue,
                which is the entity which holds all the info and does all the work.

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

class AttrStrokeType : public NodeAttribute
{
    CC_DECLARE_DYNCREATE(AttrStrokeType)

public:     // Constructors
    AttrStrokeType();
    AttrStrokeType(Node *ContextNode,
                     AttachNodeDirection Direction,
                     BOOL Locked    = FALSE,
                     BOOL Mangled   = FALSE,
                     BOOL Marked    = FALSE,
                     BOOL Selected  = FALSE);

public:
    virtual void Render(RenderRegion *pRender);
    virtual void CopyNodeContents(AttrStrokeType *NodeCopy);
    virtual void PolyCopyNodeContents(NodeRenderable* pNodeCopy);
    virtual INT32 operator==(const NodeAttribute& NodeAttrib);
    virtual Node *SimpleCopy();
    virtual UINT32 GetAttrNameID(void);
    virtual AttrIndex GetAttributeIndex () { return ATTR_STROKETYPE; }
    virtual void GetDebugDetails(StringBase *Str);
    virtual UINT32 GetNodeSize() const;

    virtual BOOL WritePreChildrenWeb(BaseCamelotFilter *pFilter);
    virtual BOOL WritePreChildrenNative(BaseCamelotFilter *pFilter);

    virtual AttributeValue* GetAttributeValue()     { return(&Value); };

    virtual BOOL NeedsTransparency() const;

    BOOL DoBecomeA(BecomeA* pBecomeA, Node* pParent);
    BOOL HasPathProcessor();
    PathProcessorStroke* GetPathProcessor();

protected:
    StrokeTypeAttrValue Value;
};






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

>   enum VariableWidthID

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    10/1/97
    Purpose:    A unique identifier UINT32 for each predefined variable width stroke function.
                This is used to save predefined varwidths in XAR files in a minimal format.

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

typedef enum
{
    VarWidth_NotPredefined = 0,     // For fns which aren't "simple" predefined ones

    VarWidth_Constant   = -1,       // All values are negative (positive values are used
    VarWidth_LinRamp    = -2,       // as references to complex function records)
    VarWidth_SRamp      = -3,
} VariableWidthID;



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

>   class VariableWidthAttrValue : public AttributeValue

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    7/1/97

    Purpose:    VariableWidth attribute value
                VariableWidth attributes describe the width characteristics for a path

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

class VariableWidthAttrValue : public AttributeValue
{
    CC_DECLARE_DYNAMIC(VariableWidthAttrValue)

public:         // Construction/Initialisation
    VariableWidthAttrValue(ValueFunction *pValueFunction = NULL);
    ~VariableWidthAttrValue();

    static BOOL Init(void);


public:         // Overridden access methods
    virtual void Render(RenderRegion *pRegion, BOOL Temp = FALSE);
    virtual void Restore(RenderRegion *pRegion, BOOL Temp);

    virtual void SimpleCopy(AttributeValue *pValue);
    virtual NodeAttribute *MakeNode();

    virtual BOOL IsDifferent(AttributeValue *pAttr);

    virtual VariableWidthAttrValue &operator=(VariableWidthAttrValue &Attrib);
    virtual INT32 operator==(const VariableWidthAttrValue &Attrib);


public:         // Specialised methods
    void SetWidthFunction(VariableWidthID PredefinedFuncID);
    void SetWidthFunction(ValueFunction *pNewFunction);

    ValueFunction *GetWidthFunction(void)       { return(WidthFunction); };
    VariableWidthID GetWidthFunctionID(void)    { return(PredefinedFunctionID); };

private:
    VariableWidthID PredefinedFunctionID;
    ValueFunction   *WidthFunction;
};



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

>   class AttrVariableWidth : public NodeAttribute

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    7/1/97

    Purpose:    VariableWidth attribute
                VariableWidth attributes are very simple, and merely contain a VariableWidthAttrValue,
                which is the entity which holds all the info and does all the work.

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

class AttrVariableWidth : public NodeAttribute
{
    CC_DECLARE_DYNCREATE(AttrVariableWidth)

// the stroke path-processor needs access to our value.
friend class PathProcessorStroke;

public:     // Constructors
    AttrVariableWidth();
    AttrVariableWidth(Node *ContextNode,
                     AttachNodeDirection Direction,
                     BOOL Locked    = FALSE,
                     BOOL Mangled   = FALSE,
                     BOOL Marked    = FALSE,
                     BOOL Selected  = FALSE);
public:
    virtual void Render(RenderRegion *pRender);
    virtual void CopyNodeContents(AttrVariableWidth *NodeCopy);
    virtual void PolyCopyNodeContents(NodeRenderable* pNodeCopy);
    virtual INT32 operator==(const NodeAttribute& NodeAttrib);
    virtual Node *SimpleCopy();
    virtual UINT32 GetAttrNameID(void);
    virtual AttrIndex GetAttributeIndex () { return ATTR_VARWIDTH; }
    virtual void GetDebugDetails(StringBase *Str);
    virtual UINT32 GetNodeSize() const;

    virtual BOOL WritePreChildrenWeb(BaseCamelotFilter *pFilter);
    virtual BOOL WritePreChildrenNative(BaseCamelotFilter *pFilter);

    virtual AttributeValue* GetAttributeValue()             { return(&Value); };

    BOOL DoBecomeA(BecomeA* pBecomeA, Node* pParent);

    BOOL HasActiveValueFunction();
protected:
    VariableWidthAttrValue Value;
};








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

>   class StrokeAttrRecordHandler : public CamelotRecordHandler

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    7/1/97
    Purpose:    Handles the reading of all Stroke attribute records in the v2 file format
                This includes StrokeType Attributes and VariableWidth attributes

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

class CXaraFileRecord;

class StrokeAttrRecordHandler : public CamelotRecordHandler
{
    CC_DECLARE_DYNAMIC(StrokeAttrRecordHandler);

public:
    StrokeAttrRecordHandler() : CamelotRecordHandler() {}
    ~StrokeAttrRecordHandler() {}

    // functions that must be implemented.
    virtual UINT32 *GetTagList();
    virtual BOOL HandleRecord(CXaraFileRecord *pCXaraFileRecord);

    // handling of atomic TAG_STROKEDEFINITION tags
    virtual BOOL BeginSubtree(UINT32 Tag);
    virtual BOOL EndSubtree(UINT32 Tag);

#ifdef XAR_TREE_DIALOG
    virtual void GetRecordDescriptionText(CXaraFileRecord* pRecord, StringBase* pStr);
#endif
};

#endif

---