mirror of
https://github.com/Ardour/ardour.git
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97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
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/*
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* Copyright (C) 2006-2014 David Robillard <d@drobilla.net>
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* Copyright (C) 2007 Doug McLain <doug@nostar.net>
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* Copyright (C) 2008-2017 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2009-2012 Carl Hetherington <carl@carlh.net>
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* Copyright (C) 2016-2017 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __gtk2_ardour_midi_view_background_h__
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#define __gtk2_ardour_midi_view_background_h__
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#include <cstdint>
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#include <gtkmm/adjustment.h>
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namespace ArdourCanvas {
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class Item;
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class LineSet;
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}
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class MidiViewBackground
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{
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public:
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MidiViewBackground (ArdourCanvas::Item* parent);
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virtual ~MidiViewBackground ();
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Gtk::Adjustment note_range_adjustment;
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enum VisibleNoteRange {
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FullRange,
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ContentsRange
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};
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void set_note_range (VisibleNoteRange r);
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inline uint8_t lowest_note() const { return _lowest_note; }
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inline uint8_t highest_note() const { return _highest_note; }
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void update_note_range(uint8_t note_num);
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virtual double contents_height() const = 0;
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double note_to_y (uint8_t note) const {
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return contents_height() - (note + 1 - lowest_note()) * note_height() + 1;
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}
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uint8_t y_to_note(double y) const;
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uint8_t contents_note_range() const {
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return highest_note() - lowest_note() + 1;
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}
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double note_height() const {
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return contents_height() / (double)contents_note_range();
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}
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sigc::signal<void> NoteRangeChanged;
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void apply_note_range (uint8_t lowest, uint8_t highest, bool to_children);
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protected:
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bool _range_dirty;
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double _range_sum_cache;
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uint8_t _lowest_note; ///< currently visible
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uint8_t _highest_note; ///< currently visible
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uint8_t _data_note_min; ///< in data
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uint8_t _data_note_max; ///< in data
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ArdourCanvas::LineSet* _note_lines;
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void color_handler ();
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void parameter_changed (std::string const &);
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void note_range_adjustment_changed();
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void update_contents_height ();
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void draw_note_lines();
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bool update_data_note_range(uint8_t min, uint8_t max);
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virtual void apply_note_range_to_children () = 0;
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virtual bool updates_suspended() const { return false; }
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};
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#endif /* __gtk2_ardour_midi_view_background_h__ */
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