layermgr.h

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// $Id: layermgr.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.
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----------------------------------

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 */

/*
*/ 

/* Declaration of the following classes
    LyrDetails
    LayerManager
    OpLayerChange
*/

#ifndef INC_LAYERMGR
#define INC_LAYERMGR

// Include files 
#include "layer.h"
//#include "listitem.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "list.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "undoop.h"         - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "selop.h" - in camtypes.h [AUTOMATICALLY REMOVED]

#define OPTOKEN_LYRCHNG _T("LayerChange")   // Optoken for the layer change operation 
#define OPTOKEN_MOVE_SEL_TO_ACTIVE_LAYER _T("MoveSelToActiveLayer")

class String_256; 


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

>   class LyrDetails: public ListItem 

    Author:     Simon_Maneggio (Xara Group Ltd) <camelotdev@xara.com>
    Created:    4/1/94
    Purpose:    LyrDetails objects are stored in a list within the LayerManager. 
                They record changes made to a layer. 

    SeeAlso:    LayerManager

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


class LyrDetails: public ListItem 
{
    CC_DECLARE_MEMDUMP(LyrDetails);

public:
    LyrDetails();       // Constructor 
    Layer *m_pLayer;    // A pointer to the Layer that the LyrDetails record describes. 
                        // NULL if the layer is New

    LayerStatus Status; // The LayerStatus structure contains all the layer details which the 
                        // user can change 

    BOOL New;           // Flag indicating if the layer is new. i.e. it does not exist in the 
                        // Camelot tree. 

    BOOL Deleted;       // Flag indicating if the layer has been deleted 

};

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

>   class LayerManager: public CCObject

    Author:     Simon_Maneggio (Xara Group Ltd) <camelotdev@xara.com>
    Created:    7/1/94
    Purpose:    The LayerManager is used to make changes to layers in the document tree. It 
                holds a pointer to a current spread, and a list of layer details for the 
                current spread (LyrDetLst). The layerDlg and InfoBar make changes to layers 
                in the current spread indirectly by changing the LyrDetList. Layer changes 
                are deferred until the CommitLayerChanges() method is called. Changes made 
                to the LyrDetList can also be cancelled by calling the CancelLayerChanges() 
                method.  

    SeeAlso:    LyrDetails
    SeeAlso:    LayerDlg
    SeeAlso:    OpLayerChange 

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

class LayerManager:public CCObject
{
public:

    LayerManager();          // Constructor 
    ~LayerManager();             // Destructor 
    
    String_256 CreateUniqueLayerID();        // Creates a layer name which is unique for 
                                             // the current spread.  
                                                
    BOOL CommitLayerChanges();               // Performs a LayerChangeOp which modifies the 
                                             // layers in the Camelot tree based on changes 
                                             // made to the LyrDetList. 

    BOOL NewCurrentSpread(Spread* NewCurrentSpread); // NewCurrentSpread becomes the 
                                                     // new current spread 

    Spread* GetCurrentSpread();              // Returns the current spread 

    BOOL CancelLayerChanges();               // Causes the changes made to the LyrDetList 
                                             // to be discarded and new values read. 

    BOOL RefreshLayerDetails();              // Refreshes the layer details list 

    void UpdateInterface();                  // Called to update the interface 



    // The layer details list is a list of LyrDetails for the current spread.
    List LyrDetList; 

private:    
    Spread* CurrentSpread;           // The current spread 

    void DeleteLayerDetList();       // Deletes the contents of the LyrDetList 
    BOOL ReadSpreadLayerDetails();   // Read the current spread's layer details into the 
                                     // LyrDetList
    void BroadcastNewCurrentSpread();// Makes calls to other subsystems that need to know 
                                     // that the current spread has changed. 
    BOOL LayerDetailsChanged();      // Used to determine if the layer details have been 
                                     // changed. We don't want to generate a LayerChangeOp
                                     // if nothing has changed. 

};


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

>   class OpLayerChange: public UndoableOperation

    Author:     Simon_Maneggio (Xara Group Ltd) <camelotdev@xara.com>
    Created:    9/7/93
    Purpose:    This class represents the LayerChange operation which is created by the 
                LayerManager to make changes to the layers of the current spread. 
    SeeAlso:    LayerManager

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

class CCAPI OpLayerChange: public UndoableOperation
{         

    CC_DECLARE_DYNCREATE( OpLayerChange );

public:
    OpLayerChange();                                
    static BOOL     Init();             
    static OpState  GetState(String_256*, OpDescriptor*);       
    void            Do(OpDescriptor*);

    virtual BOOL Undo(); 
    virtual BOOL Redo();    
};  

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

>   class ChangeLyrAttribAction: public Action

    Author:     Simon_Maneggio (Xara Group Ltd) <camelotdev@xara.com>
    Created:    13/1/94
    Purpose:    When executed the ChangeLyrAttribAction changes a layer's Status
    SeeAlso:    -

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

class CCAPI ChangeLyrAttribAction: public Action
{                                
    CC_DECLARE_DYNCREATE( ChangeLyrAttribAction )

public:
    ChangeLyrAttribAction(); 
    ~ChangeLyrAttribAction();
    virtual ActionCode Execute();    
    static ActionCode Init(Operation* const pOp, 
                           ActionList* pActionList,     
                           UINT32 ActionSize,
                           LayerStatus& Status,  // The layer status which is restored 
                                                 // when we execute the action. 
                           Layer* Layer,         // The layer to change when we execute 
                           Action** NewAction); 

private:
    Layer* ChangeLayer; // The layer to change 
    LayerStatus Status; // the new attributes of the layer 
};   
       




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

>   class CCAPI OpMoveToLayer: public UndoableOperation

    Author:     Simon_Maneggio (Xara Group Ltd) <camelotdev@xara.com> K
    Created:    3/5/00
    Purpose:    An op to move the selection from where-ever it is to the active layer.

********************************************************************************************/
class CCAPI OpMoveToLayer: public SelOperation
{         

    CC_DECLARE_DYNCREATE( OpMoveToLayer );

public:
    static BOOL     Init();             
    static OpState  GetState(String_256*, OpDescriptor*);       
    void            Do(OpDescriptor*);
};  





#endif
                    

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