Apply MIDI keyboard and "scroomer" patch.

git-svn-id: svn://localhost/ardour2/trunk@2908 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 164 insertions, 0 deletions

diff --git a/gtk2_ardour/midi_scroomer.cc b/gtk2_ardour/midi_scroomer.cc
new file mode 100644
index 0000000000..a38911d98c
--- /dev/null
+++ b/gtk2_ardour/midi_scroomer.cc
@@ -0,0 +1,164 @@
+/*
+    Copyright (C) 2008 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.
+*/
+
+#include "midi_scroomer.h"
+
+#include <cairomm/context.h>
+
+#include <iostream>
+
+using namespace Gtkmm2ext;
+using namespace Gtk;
+using namespace std;
+
+//std::map<int, Glib::RefPtr<Gdk::Pixmap> > MidiScroomer::piano_pixmaps;
+
+MidiScroomer::MidiScroomer(Adjustment& adj)
+	: Gtkmm2ext::Scroomer(adj) {
+
+	adj.set_lower(0);
+	adj.set_upper(127);
+
+	/* set minimum view range to one octave */
+	set_min_page_size(12);
+}
+
+MidiScroomer::~MidiScroomer() {
+}
+
+bool
+MidiScroomer::on_expose_event(GdkEventExpose* ev) {
+	Cairo::RefPtr<Cairo::Context> cc = get_window()->create_cairo_context();
+	GdkRectangle comp_rect, clip_rect;
+	Component first_comp = point_in(ev->area.y);
+	Component last_comp = point_in(ev->area.y + ev->area.height);
+	int height = get_height();
+	int lnote, hnote;
+	double y2note = (double) 127 / height;
+	double note2y = (double) height / 127;
+	double note_width = 0.8 * get_width();
+	double note_height = 1.4 * note2y;
+	double black_shift = 0.1 * note2y;
+	double colors[6];
+
+	//cerr << ev->area.y << " " << ev->area.height << endl;
+
+	comp_rect.x = 0;
+	comp_rect.width = get_width();
+
+	for(int i = first_comp; i <= last_comp; ++i) {
+		Component comp = (Component) i;
+		set_comp_rect(comp_rect, comp);
+
+		if(gdk_rectangle_intersect(&comp_rect, &ev->area, &clip_rect)) {
+			get_colors(colors, comp);
+
+			cc->rectangle(clip_rect.x, clip_rect.y, clip_rect.width, clip_rect.height);
+			cc->set_source_rgb (colors[3], colors[4], colors[5]);
+			cc->fill_preserve();
+			
+			cc->clip();
+			cc->set_source_rgb(colors[0], colors[1], colors[2]);
+			cc->set_line_width(note_height);
+
+			lnote = 127 - (int) floor((double) (clip_rect.y + clip_rect.height) * y2note) - 1;
+			hnote = 127 - (int) floor((double) clip_rect.y * y2note) + 1;
+
+			for(int note = lnote; note < hnote + 1; ++note) {
+				double y = height - note * note2y;
+				bool draw = false;
+				
+				switch(note % 12) {
+				case 1:
+				case 6:
+					y -= black_shift;
+					draw = true;
+					break;
+				case 3:
+				case 10:
+					y += black_shift;
+					draw = true;
+					break;
+				case 8:
+					draw = true;
+					break;
+				default:
+					break;
+				}
+				
+				if(draw) {
+					cc->set_line_width(1.4 * note2y);
+					cc->move_to(0, y);
+					cc->line_to(note_width, y);
+					cc->stroke();
+				}
+			}
+
+			cc->reset_clip();
+		}
+	}
+
+	return true;
+}
+
+void
+MidiScroomer::get_colors(double color[], Component comp) {
+	switch (comp) {
+	case TopBase:
+	case BottomBase:
+		color[0] = 0.24;
+		color[1] = 0.24;
+		color[2] = 0.24;
+		color[3] = 0.33;
+		color[4] = 0.33;
+		color[5] = 0.33;
+		break;
+	case Handle1:
+	case Handle2:
+		color[0] = 0.38;
+		color[1] = 0.38;
+		color[2] = 0.38;
+		color[3] = 0.91;
+		color[4] = 0.91;
+		color[5] = 0.91;
+		break;
+	case Slider:
+		color[0] = 0.38;
+		color[1] = 0.38;
+		color[2] = 0.38;
+		color[3] = 0.77;
+		color[4] = 0.77;
+		color[5] = 0.77;
+		break;
+	default:
+		break;
+	}
+}
+
+void
+MidiScroomer::on_size_request(Gtk::Requisition* r) {
+	r->width = 16;
+	r->height = 100;
+	//r->width = 32;
+	//r->height = 512;
+}
+
+void
+MidiScroomer::on_size_allocate(Gtk::Allocation& a) {
+	Scroomer::on_size_allocate(a);
+}