add new floating text entry class (ported from Tracks)

gtk2_ardour/floating_text_entry.h

@@ -0,0 +1,45 @@
+/*
+    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.
+
+*/
+
+#ifndef __floating_text_entry_h__
+#define __floating_text_entry_h__
+
+#include <gtkmm/entry.h>
+
+#include "ardour_window.h"
+
+class FloatingTextEntry : public ArdourWindow
+{
+  public:
+        FloatingTextEntry ();
+
+        sigc::signal1<void,std::string> use_text;
+
+  private:
+        Gtk::Entry entry;
+
+        bool key_press (GdkEventKey*);
+        void on_realize ();
+        void on_hide ();
+        void activated ();
+        
+};
+
+#endif // __ardour_window_h__
+