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region_view.h

/*
    Copyright (C) 2001-2006 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.
*/

#ifndef __gtk_ardour_region_view_h__
#define __gtk_ardour_region_view_h__

#include <vector>

#include <libgnomecanvasmm.h>
#include <libgnomecanvasmm/polygon.h>
#include <sigc++/signal.h>
#include <ardour/region.h>

#include "time_axis_view_item.h"
#include "automation_line.h"
#include "enums.h"
#include "waveview.h"
#include "canvas.h"

class TimeAxisView;
class RegionEditor;
class GhostRegion;
class AutomationTimeAxisView;

class RegionView : public TimeAxisViewItem
{
  public:
      RegionView (ArdourCanvas::Group* parent, 
                  TimeAxisView&        time_view,
                  boost::shared_ptr<ARDOUR::Region> region,
                  double               samples_per_unit,
                  Gdk::Color&          basic_color);

      RegionView (const RegionView& other);

      ~RegionView ();
      
      virtual void init (Gdk::Color& base_color, bool wait_for_data);
    
      boost::shared_ptr<ARDOUR::Region> region() const { return _region; }
      
      bool is_valid() const    { return valid; }


      void set_valid (bool yn) { valid = yn; }
      
      virtual void set_height (double);
      virtual void set_samples_per_unit (double);
      virtual bool set_duration (nframes_t, void*);
      
      void move (double xdelta, double ydelta);
      
      void raise ();
      void raise_to_top ();
      void lower ();
      void lower_to_bottom ();

      bool set_position(nframes_t pos, void* src, double* delta = 0);
      void fake_set_opaque (bool yn);

      virtual void show_region_editor () = 0;
      virtual void hide_region_editor();
      
      virtual void region_changed (ARDOUR::Change);
      
      virtual GhostRegion* add_ghost (AutomationTimeAxisView&) = 0;
      void                 remove_ghost (GhostRegion*);
      
      uint32_t get_fill_color ();

      virtual void entered () {}
      virtual void exited () {}
      
      static sigc::signal<void,RegionView*> RegionViewGoingAway;
      sigc::signal<void>                    GoingAway;
      
  protected:
      
      /** Allows derived types to specify their visibility requirements
     * to the TimeAxisViewItem parent class
     */
    RegionView (ArdourCanvas::Group *, 
            TimeAxisView&,
            boost::shared_ptr<ARDOUR::Region>,
            double      samples_per_unit,
            Gdk::Color& basic_color,
            TimeAxisViewItem::Visibility);

    virtual void region_resized (ARDOUR::Change);
    void         region_moved (void *);
    virtual void region_muted ();
    void         region_locked ();
      void         region_opacity ();
    void         region_layered ();
    void         region_renamed ();
    void         region_sync_changed ();

    static gint _lock_toggle (ArdourCanvas::Item*, GdkEvent*, void*);
    void        lock_toggle ();

    virtual void set_colors ();
    virtual void compute_colors (Gdk::Color&);
    virtual void set_frame_color ();
    virtual void reset_width_dependent_items (double pixel_width);
    
    virtual void color_handler () {}
      
    boost::shared_ptr<ARDOUR::Region> _region;
    
    ArdourCanvas::Polygon* sync_mark; ///< polgyon for sync position 
    ArdourCanvas::Line* sync_line; ///< polgyon for sync position 

    RegionEditor* editor;

    vector<ControlPoint *> control_points;
    double current_visible_sync_position;

    bool     valid; ///< see StreamView::redisplay_diskstream() 
    double  _pixel_width;
    double  _height;
    bool    in_destructor;
    
    bool             wait_for_data;
    sigc::connection data_ready_connection;
    
    vector<GhostRegion*> ghosts;
};

#endif /* __gtk_ardour_region_view_h__ */

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