add new floating text entry class (ported from Tracks)

gtk2_ardour/floating_text_entry.cc

@@ -0,0 +1,77 @@
+/*
+    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 "floating_text_entry.h"
+#include "gtkmm2ext/doi.h"
+
+#include "i18n.h"
+
+FloatingTextEntry::FloatingTextEntry ()
+	: ArdourWindow ("")
+{
+        set_name (X_("FloatingTextEntry"));
+	set_position (Gtk::WIN_POS_MOUSE);
+        set_border_width (0);
+        
+        entry.show ();
+        entry.signal_activate().connect (sigc::mem_fun (*this, &FloatingTextEntry::activated));
+        entry.signal_key_press_event().connect (sigc::mem_fun (*this, &FloatingTextEntry::key_press));
+
+        add (entry);
+}
+
+void
+FloatingTextEntry::on_realize ()
+{
+        ArdourWindow::on_realize ();
+        get_window()->set_decorations (Gdk::WMDecoration (0));
+}
+
+void
+FloatingTextEntry::activated ()
+{
+        use_text (entry.get_text()); // EMIT SIGNAL
+        delete_when_idle (this);
+}
+
+bool
+FloatingTextEntry::key_press (GdkEventKey* ev)
+{
+        switch (ev->keyval) {
+        case GDK_Escape:
+                delete_when_idle (this);
+                return true;
+                break;
+        default:
+                break;
+        }
+        return false;
+}
+
+void
+FloatingTextEntry::on_hide ()
+{
+        /* No hide button is shown (no decoration on the window), 
+           so being hidden is equivalent to the Escape key or any other 
+           method of cancelling the edit.
+        */
+
+        delete_when_idle (this);
+        ArdourWindow::on_hide ();
+}