led\'s for solo-safe and solo-isolate, rather than a context menu (mixer strip only). not finished and some logic errors in terms of turning things on and off

git-svn-id: svn://localhost/ardour2/branches/3.0@7066 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 120 insertions, 0 deletions

diff --git a/gtk2_ardour/led.cc b/gtk2_ardour/led.cc
new file mode 100644
index 0000000000..c751eb91e0
--- /dev/null
+++ b/gtk2_ardour/led.cc
@@ -0,0 +1,120 @@
+/*
+    Copyright (C) 2010 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 <iostream>
+#include <cmath>
+#include <algorithm>
+
+#include "led.h"
+
+using namespace Gdk;
+using namespace Gtk;
+using namespace Glib;
+
+LED::LED()
+        : _visual_state (0)
+        , _active (false)
+        , _red (0.0)
+        , _green (1.0)
+        , _blue (0.0)
+
+{
+}
+
+LED::~LED()
+{
+}
+
+void
+LED::render (cairo_t* cr)
+{
+        float diameter = std::min (_width, _height);
+
+        //background
+        cairo_rectangle(cr, 0, 0, _width, _height);
+        cairo_stroke_preserve(cr);
+        cairo_set_source_rgb(cr, 0, 0, 0);
+        cairo_fill(cr);
+
+	cairo_translate(cr, _width/2, _height/2);
+
+#if 0
+	//inset
+	cairo_pattern_t *pat = cairo_pattern_create_linear (0.0, 0.0, 0.0, diameter);
+	cairo_pattern_add_color_stop_rgba (pat, 0, 0,0,0, 0.4);
+	cairo_pattern_add_color_stop_rgba (pat, 1, 1,1,1, 0.7);
+	cairo_arc (cr, 0, 0, diameter/2, 0, 2 * M_PI);
+	cairo_set_source (cr, pat);
+	cairo_fill (cr);
+	cairo_pattern_destroy (pat);
+
+	//black ring
+	cairo_set_source_rgb (cr, 0, 0, 0);
+	cairo_arc (cr, 0, 0, diameter/2-2, 0, 2 * M_PI);
+	cairo_fill(cr);
+
+	//knob color
+	cairo_set_source_rgba (cr, _red, _green, _blue, _active ? 0.8 : 0.2);
+	cairo_arc (cr, 0, 0, diameter/2-3, 0, 2 * M_PI);
+	cairo_fill(cr);
+
+	//reflection
+	cairo_scale(cr, 0.7, 0.7);
+	cairo_pattern_t *pat2 = cairo_pattern_create_linear (0.0, 0.0, 0.0, diameter/2-3);
+	cairo_pattern_add_color_stop_rgba (pat2, 0, 1,1,1, _active ? 0.4 : 0.2);
+	cairo_pattern_add_color_stop_rgba (pat2, 1, 1,1,1, 0.0);
+	cairo_arc (cr, 0, 0, diameter/2-3, 0, 2 * M_PI);
+	cairo_set_source (cr, pat2);
+	cairo_fill (cr);
+	cairo_pattern_destroy (pat2);
+#endif
+
+	cairo_set_source_rgba (cr, _red, _green, _blue,  1.0);
+	cairo_arc (cr, 0, 0, diameter/2-5, 0, 2 * M_PI);
+	cairo_fill(cr);
+
+	cairo_stroke (cr);
+}
+
+void
+LED::set_visual_state (int32_t s)
+{
+        if (s != _visual_state) {
+
+                _visual_state = s;
+
+                RefPtr<Style> style = get_style();
+                Color c;
+                
+                switch (_visual_state) {
+                case 0:
+                        c = style->get_fg (STATE_NORMAL);
+                        break;
+                default:
+                        c = style->get_fg (STATE_ACTIVE);
+                        break;
+                }
+
+                _red = c.get_red_p ();
+                _green = c.get_green_p ();
+                _blue = c.get_blue_p ();
+                
+                set_dirty ();
+        }
+}