livetrax/gtk2_ardour/midi_streamview.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 __ardour_midi_streamview_h__
#define __ardour_midi_streamview_h__

#include <list>
#include <cmath>

#include "ardour/location.h"
#include "enums.h"
#include "streamview.h"
#include "time_axis_view_item.h"
#include "route_time_axis.h"

namespace Gdk {
	class Color;
}

namespace ARDOUR {
	class Crossfade;
	class MidiModel;
	class MidiRegion;
	class Route;
	class Source;
	struct PeakData;
}

namespace ArdourCanvas {
	class LineSet;
}

class PublicEditor;
class Selectable;
class MidiTimeAxisView;
class MidiRegionView;
class RegionSelection;
class CrossfadeView;
class Selection;

class MidiStreamView : public StreamView
{
  public:
	MidiStreamView (MidiTimeAxisView&);
	~MidiStreamView ();

	void set_selected_regionviews (RegionSelection&);
	void get_inverted_selectables (Selection&, std::list<Selectable* >& results);

	enum VisibleNoteRange {
		FullRange,
		ContentsRange
	};

	Gtk::Adjustment note_range_adjustment;
	ArdourCanvas::Container* midi_underlay_group;

	void set_note_range(VisibleNoteRange r);

	inline uint8_t lowest_note()  const { return _lowest_note; }
	inline uint8_t highest_note() const { return _highest_note; }

	void update_note_range(uint8_t note_num);

	void set_layer_display (LayerDisplay);
//	bool can_change_layer_display() const { return false; }  //revert this change for now.  Although stacked view is weirdly implemented wrt the "scroomer", it is still necessary to be able to manage layered regions.
	void redisplay_track ();

	inline double contents_height() const
	{ return (child_height() - TimeAxisViewItem::NAME_HIGHLIGHT_SIZE - 2); }

	inline double note_to_y(uint8_t note) const
		{ return contents_height()
			- (note + 1 - lowest_note()) * note_height() + 1; }

	uint8_t y_to_note(double y) const;

	inline double note_height() const
		{ return contents_height() / (double)contents_note_range(); }

	inline uint8_t contents_note_range() const
		{ return highest_note() - lowest_note() + 1; }

	sigc::signal<void> NoteRangeChanged;

	RegionView* create_region_view (boost::shared_ptr<ARDOUR::Region>, bool, bool);

	bool paste (ARDOUR::framepos_t pos, const Selection& selection, PasteContext& ctx, const int32_t sub_num);

	void apply_note_range(uint8_t lowest, uint8_t highest, bool to_region_views);

	void suspend_updates ();
	void resume_updates ();

  protected:
	void setup_rec_box ();
	void update_rec_box ();

  private:

	RegionView* add_region_view_internal (
		boost::shared_ptr<ARDOUR::Region>,
		bool wait_for_waves,
		bool recording = false);

	void display_region(MidiRegionView* region_view, bool load_model);
	void display_track (boost::shared_ptr<ARDOUR::Track> tr);

	void update_contents_height ();

	void draw_note_lines();
	bool update_data_note_range(uint8_t min, uint8_t max);
	void update_contents_metrics(boost::shared_ptr<ARDOUR::Region> r);

	void color_handler ();

	void note_range_adjustment_changed();
	void apply_note_range_to_regions ();

	bool                      _range_dirty;
	double                    _range_sum_cache;
	uint8_t                   _lowest_note;   ///< currently visible
	uint8_t                   _highest_note;  ///< currently visible
	uint8_t                   _data_note_min; ///< in data
	uint8_t                   _data_note_max; ///< in data
	ArdourCanvas::LineSet*    _note_lines;
	/** true if updates to the note lines and regions are currently suspended */
	bool                      _updates_suspended;
};

#endif /* __ardour_midi_streamview_h__ */