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marker_view.h

/*
    Copyright (C) 2003 Paul Davis 

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    $Id: marker_view.h,v 1.2 2003/10/29 20:57:25 pbd Exp $
*/

#ifndef __gtk_ardour_marker_view_h__
#define __gtk_ardour_marker_view_h__

#include <string>
#include <gtk--.h>
#include <gtk-canvas.h>
#include "time_axis_view_item.h"

class MarkerTimeAxisView ;
class ImageFrameView ;

/**
 * MarkerView defines a marker item that may be placed upon a MarkerTimeAxis.
 *
 * The aim of the MarkerView is to provide additional timing details for visual based time axis.
 * The MarkerView item is associated with one other TimeAxisViewItem and has a start and a duration.  
 */
00038 class MarkerView : public TimeAxisViewItem
{
      public:
            //---------------------------------------------------------------------------------------//
            // Constructor / Desctructor
            
            /**
             * Constructs a new MarkerView
             * 
             * @param parent the parent canvas item
             * @param tv the parent TimeAxisView of this item
             * @param marked the Item that this item is to be assciated (marking) with
             * @param spu the current samples per unit 
             * @param base_color
             * @param mark_type the marker type/name text, eg fade out, pan up etc.
             * @param mark_id unique name/id of this item
             * @param start the start time of this item
             * @param duration the duration of this item
             */
            MarkerView(GtkCanvasGroup *parent,
                  TimeAxisView *tv,
                  ImageFrameView* marked,
                  double spu,
                  GdkColor& base_color,
                  std::string mark_type,
                  std::string mark_id,
                  jack_nframes_t start,
                  jack_nframes_t duration) ;

            /**
             * Destructor
             * Destroys this Marker Item and removes the association between itself and the item it is marking.
             */
            ~MarkerView() ;
            
            static SigC::Signal1<void,MarkerView*> GoingAway;
            
            //---------------------------------------------------------------------------------------//
            // Marker Type Methods
            
            /**
             * Sets the marker Type text of this this MarkerItem, eg fade_out, pan up etc. 
             *
             * @param type_text the marker type text of this item
             */
            void set_mark_type_text(std::string type_text) ;
            
            /**
             * Returns the marker Type of this this MarkerItem, eg fade_out, pan up etc. 
             *
             * @return the marker type text of this item
             */
            std::string get_mark_type_text() const ;

            
            //---------------------------------------------------------------------------------------//
            // Marked Item Methods

            /**
             * Returns the time axis item being marked by this item
             *
             * @return the time axis item being marked by this item
             */
            ImageFrameView* get_marked_item() ;
            
            /**
             * Sets the time axis item being marker by this item
             *
             * @param item the time axis item to be marked by this item
             * @return the previously marked item, or 0 if no previous marked item exists
             */
            ImageFrameView* set_marked_item(ImageFrameView* item) ;
            
            //---------------------------------------------------------------------------------//
            // Emitted Signals
            
            /** Emitted when the mark type text is changed */
00115             SigC::Signal2<void,std::string,void*> MarkTypeChanged ;
            
            /** Emitted when the Marked Item is changed */
00118             SigC::Signal2<void,ImageFrameView*,void*> MarkedItemChanged ;

            
      protected:

      private:
            /** the unique name/id of this item */
00125             std::string mark_type_text ;

            /* a pointer to the time axis item this marker is assoiated(marking up) with */
            ImageFrameView* marked_item ;
            
} ; /* class MarkerView */


#endif /* __gtk_ardour_imageframe_view_h__ */

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