skeleton for MIDI cue editor

gtk2_ardour/midi_cue_editor.cc

@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2023 Paul Davis <paul@linuxaudiosystems.com>
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "canvas/canvas.h"
+#include "canvas/container.h"
+#include "canvas/debug.h"
+#include "canvas/scroll_group.h"
+#include "canvas/rectangle.h"
+
+#include "midi_cue_editor.h"
+#include "ui_config.h"
+
+using namespace ArdourCanvas;
+
+MidiCueEditor::MidiCueEditor()
+	: vertical_adjustment (0.0, 0.0, 10.0, 400.0)
+	, horizontal_adjustment (0.0, 0.0, 1e16)
+{
+	build_canvas ();
+}
+
+MidiCueEditor::~MidiCueEditor ()
+{
+}
+
+void
+MidiCueEditor::build_canvas ()
+{
+	_canvas_viewport = new ArdourCanvas::GtkCanvasViewport (horizontal_adjustment, vertical_adjustment);
+	_canvas = _canvas_viewport->canvas ();
+
+	_canvas->set_background_color (UIConfiguration::instance().color ("arrange base"));
+	// _canvas->use_nsglview (UIConfiguration::instance().get_nsgl_view_mode () == NSGLHiRes);
+
+	/* scroll group for items that should not automatically scroll
+	 *  (e.g verbose cursor). It shares the canvas coordinate space.
+	*/
+	no_scroll_group = new ArdourCanvas::Container (_canvas->root());
+
+	ArdourCanvas::ScrollGroup* hsg;
+	ArdourCanvas::ScrollGroup* hg;
+	ArdourCanvas::ScrollGroup* cg;
+
+	h_scroll_group = hg = new ArdourCanvas::ScrollGroup (_canvas->root(), ArdourCanvas::ScrollGroup::ScrollsHorizontally);
+	CANVAS_DEBUG_NAME (h_scroll_group, "canvas h scroll");
+	_canvas->add_scroller (*hg);
+
+	hv_scroll_group = hsg = new ArdourCanvas::ScrollGroup (_canvas->root(),
+							       ArdourCanvas::ScrollGroup::ScrollSensitivity (ArdourCanvas::ScrollGroup::ScrollsVertically|
+													     ArdourCanvas::ScrollGroup::ScrollsHorizontally));
+	CANVAS_DEBUG_NAME (hv_scroll_group, "canvas hv scroll");
+	_canvas->add_scroller (*hsg);
+
+	cursor_scroll_group = cg = new ArdourCanvas::ScrollGroup (_canvas->root(), ArdourCanvas::ScrollGroup::ScrollsHorizontally);
+	CANVAS_DEBUG_NAME (cursor_scroll_group, "canvas cursor scroll");
+	_canvas->add_scroller (*cg);
+
+	/*a group to hold global rects like punch/loop indicators */
+	global_rect_group = new ArdourCanvas::Container (hv_scroll_group);
+	CANVAS_DEBUG_NAME (global_rect_group, "global rect group");
+
+        transport_loop_range_rect = new ArdourCanvas::Rectangle (global_rect_group, ArdourCanvas::Rect (0.0, 0.0, 0.0, ArdourCanvas::COORD_MAX));
+	CANVAS_DEBUG_NAME (transport_loop_range_rect, "loop rect");
+	transport_loop_range_rect->hide();
+
+	/*a group to hold time (measure) lines */
+	time_line_group = new ArdourCanvas::Container (h_scroll_group);
+	CANVAS_DEBUG_NAME (time_line_group, "time line group");
+
+	_trackview_group = new ArdourCanvas::Container (hv_scroll_group);
+	CANVAS_DEBUG_NAME (_trackview_group, "Canvas TrackViews");
+
+	// used as rubberband rect
+	rubberband_rect = new ArdourCanvas::Rectangle (hv_scroll_group, ArdourCanvas::Rect (0.0, 0.0, 0.0, 0.0));
+	rubberband_rect->hide();
+}
+

gtk2_ardour/midi_cue_editor.h

@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2023 Paul Davis <paul@linuxaudiosystems.com>
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __gtk_ardour_midi_cue_editor_h__
+#define __gtk_ardour_midi_cue_editor_h__
+
+#include <gtkmm/adjustment.h>
+
+#include "cue_editor.h"
+
+namespace Gtk {
+	class Widget;
+}
+
+namespace ArdourCanvas {
+	class Canvas;
+	class Container;
+	class GtkCanvasViewport;
+	class ScrollGroup;
+}
+
+class MidiCueEditor : public CueEditor
+{
+  public:
+	MidiCueEditor ();
+	~MidiCueEditor ();
+
+	ArdourCanvas::Container* get_noscroll_group() const { return no_scroll_group; }
+	Gtk::Widget& viewport() { return *_canvas_viewport; }
+
+ private:
+	Gtk::Adjustment vertical_adjustment;
+	Gtk::Adjustment horizontal_adjustment;
+	ArdourCanvas::GtkCanvasViewport* _canvas_viewport;
+	ArdourCanvas::Canvas* _canvas;
+
+	ArdourCanvas::Container* tempo_group;
+
+	/* The group containing all other groups that are scrolled vertically
+	   and horizontally.
+	*/
+	ArdourCanvas::ScrollGroup* hv_scroll_group;
+
+	/* The group containing all other groups that are scrolled horizontally ONLY
+	*/
+	ArdourCanvas::ScrollGroup* h_scroll_group;
+
+	/* Scroll group for cursors, scrolled horizontally, above everything else
+	*/
+	ArdourCanvas::ScrollGroup* cursor_scroll_group;
+
+	/* The group containing all trackviews. */
+	ArdourCanvas::Container* no_scroll_group;
+
+	/* The group containing all trackviews. */
+	ArdourCanvas::Container* _trackview_group;
+	ArdourCanvas::Container* global_rect_group;
+	ArdourCanvas::Container* time_line_group;
+
+	ArdourCanvas::Rectangle* transport_loop_range_rect;
+
+	void build_canvas ();
+};
+
+
+#endif /* __gtk_ardour_midi_cue_editor_h__ */

gtk2_ardour/wscript

@@ -160,6 +160,7 @@ gtk2_ardour_sources = [
         'midi_channel_dialog.cc',
         'midi_channel_selector.cc',
         'midi_clip_editor.cc',
+        'midi_cue_editor.cc',
         'midi_cut_buffer.cc',
         'midi_export_dialog.cc',
         'midi_list_editor.cc',