Provide dialogs to edit pan values numerically, at least for

mono and stereo panners.


git-svn-id: svn://localhost/ardour2/branches/3.0@12577 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 138 insertions, 0 deletions

diff --git a/gtk2_ardour/stereo_panner_editor.cc b/gtk2_ardour/stereo_panner_editor.cc
new file mode 100644
index 0000000000..0cc856f500
--- /dev/null
+++ b/gtk2_ardour/stereo_panner_editor.cc
@@ -0,0 +1,138 @@
+/*
+    Copyright (C) 2012 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 <gtkmm.h>
+#include "gtkmm2ext/utils.h"
+#include "gtkmm2ext/gtk_ui.h"
+#include "gtkmm2ext/gui_thread.h"
+#include "ardour/panner.h"
+#include "pbd/controllable.h"
+#include "stereo_panner_editor.h"
+#include "stereo_panner.h"
+#include "i18n.h"
+
+using namespace std;
+using namespace Gtk;
+using namespace Gtkmm2ext;
+
+StereoPannerEditor::StereoPannerEditor (StereoPanner* p)
+	: PannerEditor (_("Stereo Panner"))
+	, _panner (p)
+	, _ignore_changes (false)
+{
+	Table* t = manage (new Table (2, 3));
+	t->set_spacings (6);
+
+	int n = 0;
+	
+	t->attach (*manage (left_aligned_label (_("Position"))), 0, 1, n, n + 1);
+	t->attach (_position, 1, 2, n, n + 1);
+	t->attach (*manage (left_aligned_label (_("%"))), 2, 3, n, n + 1);
+	++n;
+	
+	t->attach (*manage (left_aligned_label (_("Width"))), 0, 1, n, n + 1);
+	t->attach (_width, 1, 2, n, n + 1);
+	t->attach (*manage (left_aligned_label (_("%"))), 2, 3, n, n + 1);
+	++n;
+
+	get_vbox()->pack_start (*manage (t));
+	get_vbox()->set_spacing (6);
+
+	_position.set_increments (1, 10);
+	_width.set_increments (1, 10);
+	set_position_range ();
+	set_width_range ();
+
+	_panner->get_position_controllable()->Changed.connect (
+		_connections, invalidator (*this), boost::bind (&StereoPannerEditor::update_editor, this), gui_context ()
+		);
+
+	_panner->get_width_controllable()->Changed.connect (
+		_connections, invalidator (*this), boost::bind (&StereoPannerEditor::update_editor, this), gui_context ()
+		);
+	
+	_panner->DropReferences.connect (_connections, invalidator (*this), boost::bind (&StereoPannerEditor::panner_going_away, this), gui_context ());
+	_position.signal_value_changed().connect (sigc::mem_fun (*this, &StereoPannerEditor::position_changed));
+	_width.signal_value_changed().connect (sigc::mem_fun (*this, &StereoPannerEditor::width_changed));
+
+	show_all ();
+	update_editor ();
+}
+
+void
+StereoPannerEditor::panner_going_away ()
+{
+	_panner = 0;
+}
+
+void
+StereoPannerEditor::update_editor ()
+{
+	if (!_panner) {
+		return;
+	}
+	
+	_ignore_changes = true;
+	_position.set_value (100 * _panner->get_position_controllable()->get_value ());
+	_width.set_value (100 * _panner->get_width_controllable()->get_value ());
+	_ignore_changes = false;
+}
+
+void
+StereoPannerEditor::position_changed ()
+{
+	if (_ignore_changes || !_panner) {
+		return;
+	}
+
+	_ignore_changes = true;
+	double const v = _position.get_value() / 100;
+	_panner->get_position_controllable()->set_value (v);
+	set_width_range ();
+	_ignore_changes = false;
+}
+
+void
+StereoPannerEditor::width_changed ()
+{
+	if (_ignore_changes || !_panner) {
+		return;
+	}
+
+	_ignore_changes = true;
+	double const v = _width.get_value() / 100;
+	_panner->get_width_controllable()->set_value (v);
+	set_position_range ();
+	_ignore_changes = false;
+}
+
+void
+StereoPannerEditor::set_position_range ()
+{
+	pair<double, double> const pr = _panner->panner()->position_range ();
+	_position.set_range (pr.first * 100, pr.second * 100);
+}
+
+void
+StereoPannerEditor::set_width_range ()
+{
+	pair<double, double> const wr = _panner->panner()->width_range ();
+	_width.set_range (wr.first * 100, wr.second * 100);
+}
+