selmsg.h

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

// Definition of Selection messages

#ifndef INC_SELMSG
#define INC_SELMSG


/*********************************************************************************************
>   class SelChangingMessage : public Msg

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    11/5/94
    Purpose:    This message is sent at the end of all operations which have changed the
                selection.
                
                It is generated by Application::UpdateSelection() and SelRange::Update()
                when they are called, which includes such things as a document change
                altering the selection.

    SeeAlso:    SelRange; Application

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

class SelChangingMsg : public Msg
{
    CC_DECLARE_DYNAMIC(SelChangingMsg)

public:

    // Messages are sent on (after!) these events.
    // Note attribute changes are divided into two groups Colour attribute changes and
    //  non-colour attribute changes. Recognising this major division between attributes (colours
    //  change more frequently than other attributes) allows UI redraw to be somewhat optimised.
    //  Sometimes it may be necessary to send both a COLOURATTCHANGED and a NONCOLOURATTCHANGED
    //  message!
    enum SelectionState
    {
        SELECTIONCHANGED,               // The selection has changed (ie. nodes have been added/removed
                                        //  from the Selection).
        COLOURATTCHANGED,               // An attribute in the selection to do with colours in some way has changed
        NONCOLOURATTCHANGED,            // An attribute in the selection not to do with colours has changed
        NODECHANGED,                    // At least one of the nodes in the selection has changed
                                        // NOTE! This means that its bounds may have changed
        EFFECTSTACKCHANGED              // An effect/effects applied to the selection has changed
        // Cor! Lots of ways the selection can change, huh?!
    };

    
    SelectionState State;               // The state, as defined above
    BOOL InDifferentDocument;           // Flag indicating the selection has changed
                                        // to a different document than the last
                                        // SelChangingMsg was for.

                                        // Constructor
    SelChangingMsg(SelectionState NewState, BOOL DiffDoc=FALSE)
            : State(NewState), InDifferentDocument(DiffDoc)
            { /* empty */ }
};

#endif

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