1 files changed, 166 insertions, 0 deletions
diff --git a/libs/widgets/ardour_dropdown.cc b/libs/widgets/ardour_dropdown.cc
new file mode 100644
index 0000000000..24c8d030a0
--- /dev/null
+++ b/libs/widgets/ardour_dropdown.cc
@@ -0,0 +1,166 @@
+/*
+    Copyright (C) 2014 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 <pangomm/layout.h>
+
+#include "pbd/compose.h"
+#include "pbd/error.h"
+#include "pbd/stacktrace.h"
+
+#include "gtkmm2ext/utils.h"
+#include "gtkmm2ext/rgb_macros.h"
+#include "gtkmm2ext/gui_thread.h"
+
+#include "ardour/rc_configuration.h" // for widget prelight preference
+
+#include "widgets/ardour_dropdown.h"
+
+#include "pbd/i18n.h"
+
+#define REFLECTION_HEIGHT 2
+
+using namespace Gdk;
+using namespace Gtk;
+using namespace Glib;
+using namespace PBD;
+using namespace ArdourWidgets;
+using namespace std;
+
+
+ArdourDropdown::ArdourDropdown (Element e)
+	: _scrolling_disabled(false)
+{
+//	signal_button_press_event().connect (sigc::mem_fun(*this, &ArdourDropdown::on_mouse_pressed));
+	_menu.signal_size_request().connect (sigc::mem_fun(*this, &ArdourDropdown::menu_size_request));
+
+	_menu.set_reserve_toggle_size(false);
+
+	add_elements(e);
+	add_elements(ArdourButton::Menu);
+}
+
+ArdourDropdown::~ArdourDropdown ()
+{
+}
+
+void
+ArdourDropdown::menu_size_request(Requisition *req) {
+	req->width = max(req->width, get_allocation().get_width());
+}
+
+bool
+ArdourDropdown::on_button_press_event (GdkEventButton* ev)
+{
+	if (binding_proxy.button_press_handler (ev)) {
+		return true;
+	}
+
+	if (ev->type == GDK_BUTTON_PRESS && ev->button == 1) {
+		Gtkmm2ext::anchored_menu_popup(&_menu, this, get_text(), 1, ev->time);
+	}
+
+	return true;
+}
+
+bool
+ArdourDropdown::on_scroll_event (GdkEventScroll* ev)
+{
+	using namespace Menu_Helpers;
+
+	if (_scrolling_disabled) {
+		return false;
+	}
+
+	const MenuItem * current_active = _menu.get_active();
+	const MenuList& items = _menu.items ();
+	int c = 0;
+
+	if (!current_active) {
+		return true;
+	}
+
+	/* work around another gtkmm API clusterfuck
+	 * const MenuItem* get_active () const
+	 * void set_active (guint index)
+	 *
+	 * also MenuList.activate_item does not actually
+	 * set it as active in the menu.
+	 *
+	 */
+
+	switch (ev->direction) {
+		case GDK_SCROLL_UP:
+
+			for (MenuList::const_reverse_iterator i = items.rbegin(); i != items.rend(); ++i, ++c) {
+				if ( &(*i) != current_active) {
+					continue;
+				}
+				if (++i != items.rend()) {
+					c = items.size() - 2 - c;
+					assert(c >= 0);
+					_menu.set_active(c);
+					_menu.activate_item(*i);
+				}
+				break;
+			}
+			break;
+		case GDK_SCROLL_DOWN:
+			for (MenuList::const_iterator i = items.begin(); i != items.end(); ++i, ++c) {
+				if ( &(*i) != current_active) {
+					continue;
+				}
+				if (++i != items.end()) {
+					assert(c + 1 < (int) items.size());
+					_menu.set_active(c + 1);
+					_menu.activate_item(*i);
+				}
+				break;
+			}
+			break;
+		default:
+			break;
+	}
+	return true;
+}
+
+void
+ArdourDropdown::clear_items ()
+{
+	_menu.items ().clear ();
+}
+
+void
+ArdourDropdown::AddMenuElem (Menu_Helpers::Element e)
+{
+	using namespace Menu_Helpers;
+
+	MenuList& items = _menu.items ();
+
+	items.push_back (e);
+}
+
+void
+ArdourDropdown::disable_scrolling()
+{
+	_scrolling_disabled = true;
+}