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[ardour.git] / libs / ardour / pan_controllable.cc

diff --git a/libs/ardour/pan_controllable.cc b/libs/ardour/pan_controllable.cc
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+++ b/libs/ardour/pan_controllable.cc
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+/*
+    Copyright (C) 2011 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/pannable.h"
+#include "ardour/panner.h"
+#include "ardour/pan_controllable.h"
+
+using namespace ARDOUR;
+
+double
+PanControllable::lower () const
+{
+        switch (parameter().type()) {
+        case PanWidthAutomation:
+                return -1.0;
+        default:
+                return 0.0;
+        }
+}
+
+void
+PanControllable::set_value (double v)
+{
+        boost::shared_ptr<Panner> p = owner->panner();
+
+        if (!p) {
+                /* no panner: just do it */
+                AutomationControl::set_value (v);
+                return;
+        }
+
+        bool can_set = false;
+
+        switch (parameter().type()) {
+        case PanWidthAutomation:
+                can_set = p->clamp_width (v);
+                break;
+        case PanAzimuthAutomation:
+                can_set = p->clamp_position (v);
+                break;
+        case PanElevationAutomation:
+                can_set = p->clamp_elevation (v);
+                break;
+        default:
+                break;
+        }
+
+        if (can_set) {
+                AutomationControl::set_value (v);
+        }
+}
+