Mix group tabs in the mixer.

git-svn-id: svn://localhost/ardour2/branches/3.0@5228 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 146 insertions, 0 deletions

diff --git a/gtk2_ardour/mixer_group_tabs.cc b/gtk2_ardour/mixer_group_tabs.cc
new file mode 100644
index 0000000000..44995a3bf2
--- /dev/null
+++ b/gtk2_ardour/mixer_group_tabs.cc
@@ -0,0 +1,146 @@
+/*
+    Copyright (C) 2009 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 "ardour/route_group.h"
+#include "ardour/session.h"
+#include "mixer_group_tabs.h"
+#include "mixer_strip.h"
+#include "mixer_ui.h"
+#include "utils.h"
+
+using namespace std;
+using namespace ARDOUR;
+
+MixerGroupTabs::MixerGroupTabs (Mixer_UI* m)
+	: _mixer (m)
+{
+	
+}
+
+void
+MixerGroupTabs::set_session (Session* s)
+{
+	s->RouteMixGroupChanged.connect (mem_fun (*this, &MixerGroupTabs::set_dirty));
+}
+
+
+/** Handle a size request.
+ *  @param req GTK requisition
+ */
+void
+MixerGroupTabs::on_size_request (Gtk::Requisition *req)
+{
+	/* Use a dummy, small width and the actual height that we want */
+	req->width = 16;
+	req->height = 16;
+}
+
+
+void
+MixerGroupTabs::render (cairo_t* cr)
+{
+	/* background */
+	
+	cairo_set_source_rgb (cr, 0, 0, 0);
+	cairo_rectangle (cr, 0, 0, _width, _height);
+	cairo_fill (cr);
+
+	int32_t curr_start = 0;
+	RouteGroup* curr_group = 0;
+	Gdk::Color curr_colour;
+
+	int32_t x = 0;
+	for (list<MixerStrip*>::iterator i = _mixer->strips.begin(); i != _mixer->strips.end(); ++i) {
+
+		if ((*i)->route()->is_master() || (*i)->route()->is_control()) {
+			continue;
+		}
+		
+		RouteGroup* g = (*i)->mix_group ();
+
+		if (g != curr_group) {
+			if (curr_group) {
+				draw_group (cr, curr_start, x, curr_group, curr_colour);
+			}
+
+			curr_start = x;
+			curr_group = g;
+			curr_colour = (*i)->color ();
+		}
+
+		x += (*i)->get_width ();
+	}
+
+	if (curr_group) {
+		draw_group (cr, curr_start, x, curr_group, curr_colour);
+	}
+}
+
+void
+MixerGroupTabs::draw_group (cairo_t* cr, int32_t x1, int32_t x2, RouteGroup* g, Gdk::Color const & colour)
+{
+	double const arc_radius = _height;
+
+	if (g->is_active()) {
+		cairo_set_source_rgba (cr, colour.get_red_p (), colour.get_green_p (), colour.get_blue_p (), 1);
+	} else {
+		cairo_set_source_rgba (cr, 1, 1, 1, 0.2);
+	}
+	
+	cairo_arc (cr, x1 + arc_radius, _height, arc_radius, M_PI, 3 * M_PI / 2);
+	cairo_line_to (cr, x2 - arc_radius, 0);
+	cairo_arc (cr, x2 - arc_radius, _height, arc_radius, 3 * M_PI / 2, 2 * M_PI);
+	cairo_line_to (cr, x1, _height);
+	cairo_fill (cr);
+
+	pair<string, double> const f = fit_to_pixels (cr, g->name(), x2 - x1 - arc_radius * 2);
+
+	cairo_text_extents_t ext;
+	cairo_text_extents (cr, g->name().c_str(), &ext);
+
+	cairo_set_source_rgb (cr, 1, 1, 1);
+	cairo_move_to (cr, x1 + (x2 - x1 - f.second) / 2, _height - ext.height / 2);
+	cairo_save (cr);
+	cairo_show_text (cr, f.first.c_str());
+	cairo_restore (cr);
+}
+
+bool
+MixerGroupTabs::on_button_press_event (GdkEventButton* ev)
+{
+	int32_t x = 0;
+	list<MixerStrip*>::iterator i = _mixer->strips.begin();
+	while (x < ev->x && i != _mixer->strips.end()) {
+		x += (*i)->get_width ();
+		if (x < ev->x) {
+			++i;
+		}
+	}
+
+	if (i == _mixer->strips.end()) {
+		return false;
+	}
+	
+	RouteGroup* g = (*i)->mix_group ();
+	if (g) {
+		g->set_active (!g->is_active (), this);
+	}
+
+	return true;
+}