colmsg.h

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

// Definition of Colour messages

#ifndef INC_COLMSG
#define INC_COLMSG

class Document; 
class ColourList;
class IndexedColour;



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

>   class ColourChangingMessage : public Msg

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    11/5/94
    Purpose:    This message is sent whenever certain events of importance happen in the
                colour system. Most of these events relate to IndexedColour lists, or
                individual IndexedColours.
                See Develop:Camelot\Docs\howtouse\message.doc for details.

    SeeAlso:    ColourManager

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

class ColourChangingMsg : public Msg
{
    CC_DECLARE_DYNAMIC(ColourChangingMsg)

public:
    // list messages are sent on these events.
    enum ColourState
    {
        LISTPAGED,                      // Sent when a different list is paged in
        LISTUPDATED,                    // Sent when the existing list is edited
        COLOURUPDATED,                  // Sent when a colour has changed (visibly - see below)
        COLOURUPDATEDINVISIBLE,         // Sent when a colour has changed (invisibly - see below)
        LISTDESELECTED,                 // Sent when there is now no selected list
        LISTDELETED,                    // Sent when a list has been deleted

        NEWLISTBORN,                    // Sent when a new list is created, so that
                                        // others can add sort modes to it.

        SELVIEWCONTEXTCHANGE            // Sent when the colour context attached to the
                                        // selected view changes (so the col editor, gallery,
                                        // line can redraw using new colour correction info)
    };
    
    Document *ScopeDoc;                 // Points to the document in which the change occurred
    ColourList *NewColourList;          // NULL, or points to the new/affected ColourList
    IndexedColour *ChangedColour;       // NULL, or pointer to the colour which has changed
    ColourState State;                  // The state, as defined above

                                        // Constructor
    ColourChangingMsg(Document *pScopeDocument, ColourList *pChangedList,
                        IndexedColour *pChangedColour, ColourState NewState)
        : ScopeDoc(pScopeDocument), NewColourList(pChangedList), ChangedColour(pChangedColour), State(NewState)
            { /* empty */ }
};



// **** SPECIAL NOTE ****
// COLOURUPDATED and COLOURUPDATEDINVISIBLE are used in the following fashion:
// If the definition of the colour chnages such that the actual dispalyed colour will change,
// thus necessitating a redraw of the document, a COLOURUPDATED should be sent.
// If part of the definition changes which will not need a redraw of coloured regions (e.g
// the name, type, etc), then a COLOURUPDATEDINVISIBLE is sent. The latter is only used
// by those entities which need to update on all colour changes (they sit on both messages)
// while things like document redraws only occur if the visible colour has chnaged.
// See ColourManager::ColourHasChanged and ColourHasChangedInvisible

#endif

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