docmsgs.h

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// $Id: docmsgs.h 751 2006-03-31 15:43:49Z alex $
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 */

// docmsgs.h - The DocChangingMsg class
// See document.cpp for what little implementation exists (CC_IMPLEMENT_DYNAMIC)



#ifndef INC_DOCMSGS
#define INC_DOCMSGS

#include "msg.h"

class Document;

/*********************************************************************************************
>   class DocChangingMessage : public Msg

    Author:     Justin_Flude (Xara Group Ltd) <camelotdev@xara.com>
    Created:    8/4/1994
    Purpose:    This message is sent when something about a document changes. This includes:
                MonoOn
                    BORN (pChangingDoc)         - When a doc has been created
                    ABOUTTODIE (pChangingDoc)   - When a doc is starting to be destructed
                    KILLED (pChangingDoc)       - When a doc has been destructed

                    TITLECHANGED (pChangingDoc) - When the document title text has changed

                    SELCHANGED (pOldDoc,pNewDoc)- When SelectedDoc has changed
                MonoOff

    Documentation:  docs\howtouse\messages.doc

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

    

class DocChangingMsg : public Msg
{
    CC_DECLARE_DYNAMIC(DocChangingMsg)
public:

    // Document messages are sent on these events.
    enum DocState
    {
        BORN,                       // sent when a document has just been constructed
        SELCHANGED,                 // New style (22/7/94) selection changing message
                                    // as described in the docstate.doc document,
                                    // pOldDoc being the one that is being unselected
                                    // and pNewDoc being the one selected.
                                    // NOTE!!!! pOldDoc and/or pNewDoc can be NULL!!!!!

        ABOUTTODIE,                 // sent just before a document is destroyed
        KILLED,                     // sent after a document has been destroyed

        TITLECHANGED,               // sent if the doc's title text has been changed
        BORNANDSTABLE               // sent as the last part of a document creation process
                                    // at present it is sent as the last part of a new
                                    // document or open document process. This means that
                                    // the document is loaded, selected, everything is set up
                                    // and ready, so now is the time to update details on the
                                    // document such as those displayed in the options dialog
    };

    Document* pChangingDoc;         // points to document being created/destroyed
                                    //   (BORN/ABOUTTODIE/KILLED/TITLECHANGED/BORNANDSTABLE only)

    Document* pOldDoc;              // points to document which was selected (or NULL)
    Document* pNewDoc;              // points to document which is now selected (or NULL)
                                    //   (SELCHANGED only)
    DocState  State;                // The message specifics, as enumerated above
                                    //   (All messages)


    DocChangingMsg(Document* pdoc, DocState state)
      : pChangingDoc(pdoc), pOldDoc(NULL), pNewDoc(NULL), State(state) { /* empty */ }

    DocChangingMsg(Document* pThisOldDoc, Document* pThisNewDoc, DocState state)
      : pChangingDoc(NULL), pOldDoc(pThisOldDoc), pNewDoc(pThisNewDoc), State(state) { /* empty */ }
};


#endif

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