objchge.h

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// $Id: objchge.h 1282 2006-06-09 09:46:49Z alex $
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 */
// Header for the perspective mould shapes implementation

#ifndef INC_OBJCHANGE
#define INC_OBJCHANGE

//#include "node.h" // for ChangeCode enum - in camtypes.h [AUTOMATICALLY REMOVED]

class Node;
class UndoableOperation;
class Path;
class Spread;


/***********************************************************************************************
>   typedef enum ObjChangeType

    Author:     Ed_Cornes (Xara Group Ltd) <camelotdev@xara.com>
    Date:       4/5/95
    Purpose:    Indicate to AllowOp()'s from which direction they were called
    SeeAlso:    ObjChangeFlags, ObjChangeParam
***********************************************************************************************/

typedef enum ObjChangeDirection
{
    OBJCHANGE_CALLEDBYOP,
    OBJCHANGE_CALLEDBYPARENT,
    OBJCHANGE_CALLEDBYCHILD
};


/***********************************************************************************************
>   typedef enum ObjChangeType

    Author:     Mike_Kenny (Xara Group Ltd) <camelotdev@xara.com>
    Date:       09/01/95
    Purpose:    Types of change one can generate on a child object. These types form the 
                ObjChangeType field inside the following class ObjChangeParam.
    SeeAlso:    ObjChangeFlags, ObjChangeParam
***********************************************************************************************/

typedef enum ObjChangeType
{
    OBJCHANGE_UNDEFINED,
    OBJCHANGE_STARTING,             // the child object is about to undergo a change
    OBJCHANGE_RENDERCURRENTBLOBS,   // during an interactive change ie a drag signal 'before' 
    OBJCHANGE_RENDERCHANGEDBLOBS,   // during an interactive change signal 'after'
    OBJCHANGE_FINISHED,             // having actually changed the tree child object inform the parent
    OBJCHANGE_IGNORE,               // Ignore this ObjChangeParam message
    OBJCHANGE_FAILED                // failed to actually change the child object
};


/***********************************************************************************************
>   class ObjChangeFlags

    Author:     Mike_Kenny (Xara Group Ltd) <camelotdev@xara.com> (& Markn)
    Date:       09/01/95
    Purpose:    Defines physical changes which have occured on an object. These should be as 
                high level as possible.
                If your object has changed in a subtle way, try and choose the field which best 
                matches the change. Try not to invent a new field for your change as like as 
                not no one will respond to it.
    SeeAlso:    ObjChangeType, ObjChangeParam
***********************************************************************************************/

class ObjChangeFlags
{
    public:
        ObjChangeFlags( BOOL Delete         = FALSE,
                        BOOL Replace        = FALSE,
                        BOOL Move           = FALSE,
                        BOOL Attr           = FALSE,
                        BOOL MultiReplace   = FALSE,
                        BOOL TransForm      = FALSE,
                        BOOL Copy           = FALSE,
                        BOOL Regen          = FALSE);

    public:
        BYTE DeleteNode             : 1;    // The node will be deleted (or hidden)
        BYTE ReplaceNode            : 1;    // The node will be replaced with *one* other
        BYTE MoveNode               : 1;    // The node will be moved to another place in the tree
        BYTE Attribute              : 1;    // One or more attributes will be applied to this node
        BYTE MultiReplaceNode       : 1;    // The node will be replaced with one or more nodes
        BYTE TransformNode          : 1;    // The node will be transformed
        BYTE CopyNode               : 1;    // The node will be copied to the clipboard
        BYTE RegenerateNode         : 1;    // The node will be regenerated
};



/***********************************************************************************************
>   class ObjChangeMask

    Author:     Mike_Kenny (Xara Group Ltd) <camelotdev@xara.com>
    Date:       11/01/95
    Purpose:    Defines what messages if any are passed to parent objects. The starting message
                is not defined here as this is used to allow nodes to actually set the mask.
                All flags are initialised to FALSE and should be set by nodes to TRUE when they
                want to receive a message. If any parent node requires a message then all will
                get the message. 
                Note the mask is verified and corrected so that messages will be sent correctly
                in sequence. 
***********************************************************************************************/

class ObjChangeMask
{
    public:
        ObjChangeMask();
        void CorrectMask();
        void ClaimAll();

    public:
        BYTE EorBlobs : 1;
        BYTE Finished : 1;
}; 


/***********************************************************************************************
>   class ObjChangeParam

    Author:     Mike_Kenny (Xara Group Ltd) <camelotdev@xara.com>
    Date:       09/01/95
    Purpose:    Provides a derivable structure for passing to a nodes OnChildChange virtual 
                function. To create this class parameter simply call Define with the necessary
                change variables.
    SeeAlso:    ObjChangeType, ObjChangeFlags
***********************************************************************************************/

class ObjChangeParam : public CCObject
{
    CC_DECLARE_DYNAMIC(ObjChangeParam)

    public:
        ObjChangeParam();
        ObjChangeParam(ObjChangeType cType,ObjChangeFlags cFlags,Node* cNode,UndoableOperation* cOp,
                       ObjChangeDirection=OBJCHANGE_CALLEDBYOP, Node* pCallingChild = NULL);
        ~ObjChangeParam();

        void                Define(ObjChangeType, ObjChangeFlags, Node*, UndoableOperation*,
                                   ObjChangeDirection direction=OBJCHANGE_CALLEDBYOP,
                                   Node* pCallingChild = NULL);
        ObjChangeType       GetChangeType()  const { return ChangeType; }
        ObjChangeFlags      GetChangeFlags() const { return ChangeFlags; }
        UndoableOperation*  GetOpPointer()   const { return pChangeOp; }
        Node*               GetChangeObj()   const { return pChangeNode; }
        ObjChangeDirection  GetDirection()   const { return ChangeDirection; }
        void                SetDirection(ObjChangeDirection direction) { ChangeDirection=direction; }

        void                SetReasonForDenial(UINT32 IDS)  { DenialReason = IDS; }
        UINT32              GetReasonForDenial()            { return DenialReason; }
        ObjChangeFlags*     GetSettableChangeFlags() { return &ChangeFlags; }

        void                SetCallingChild(Node* pCallingChild) { m_pCallingChild = pCallingChild; }
        Node*               GetCallingChild() { return m_pCallingChild; }

        void                SetRetainCachedData(BOOL bNewValue) {m_bRetainCachedData = bNewValue;}
        BOOL                GetRetainCachedData() const {return m_bRetainCachedData;}

    public:
        ObjChangeMask       ChangeMask;

    protected:
        ObjChangeType       ChangeType;
        ObjChangeFlags      ChangeFlags;
        ObjChangeDirection  ChangeDirection;
        UndoableOperation*  pChangeOp;
        Node*               pChangeNode;
        UINT32              DenialReason;
        Node*               m_pCallingChild;
        BOOL                m_bRetainCachedData;        // When processing try to retain cached data if possible

};




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

>   class ObjChangePathEdit : public ObjChangeParam

    Author:     Mike_Kenny (Xara Group Ltd) <camelotdev@xara.com>
    Date:       10/01/95
    Purpose:    A derived change parameter for use in path editing. It is exactly the same as
                ObjChangeParam apart from providing a path pointer, for use during eor drags,
                to describe the current state of the dragged path. Obviously this cannot be
                determined from the tree object until it has been updated when the drag finishes
    SeeAlso:    

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

class ObjChangePathEdit : public ObjChangeParam
{
    CC_DECLARE_DYNAMIC(ObjChangePathEdit)

    public:
         ObjChangePathEdit();
        ~ObjChangePathEdit();
         void Define(ObjChangeType, ObjChangeFlags, Node*, UndoableOperation*, Path*, Spread*);
         
         ChangeCode ObjChangeStarting(Node*,UndoableOperation*,Path*,Spread*,BOOL);
         ChangeCode RenderCurrentBlobs(Node*,UndoableOperation*,Path*,Spread*,BOOL);
         ChangeCode RenderChangedBlobs(Node*,UndoableOperation*,Path*,Spread*,BOOL);
         ChangeCode ObjChangeFinished(Node*,UndoableOperation*,Path*,Spread*,BOOL);
         ChangeCode ObjChangeFailed(Node*,UndoableOperation*,Path*,Spread*,BOOL);

    public:
        Path*   pChangePath;
        Spread* pChangeSpread;
};



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

>   class ObjChangeParamWithToken

    Author:     Peter_Arnold (Xara Group Ltd) <camelotdev@xara.com>
    Date:       6/3/95
    Purpose:    Identical to a ObjChangeParam object, except that there is an additional field
                that contains the OpToken
    SeeAlso:    ObjChangeParam

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

class ObjChangeParamWithToken : public ObjChangeParam
{
    CC_DECLARE_DYNAMIC(ObjChangeParamWithToken)

    public:
        ObjChangeParamWithToken(ObjChangeType cType,ObjChangeFlags cFlags,Node* cNode,UndoableOperation* cOp, String* pToken);
        ~ObjChangeParamWithToken();

        String* GetOpToken() {return &OperationToken;};

    protected:
        String  OperationToken;
};


#endif

---