Fix Editor/Mixer visibility (OSX, NSGLCanvas)

Only unpacking a widget retains the GdkWindow and and the widget is still
mapped. The NSView is still visible. See also 235631a6.

diff --git a/libs/gtkmm2ext/tabbable.cc b/libs/gtkmm2ext/tabbable.cc
index 61e401f1a1ea0a2ee3118c6980a1c778c8ca7be2..8653a6a29d5442fb73544846f138c110eb8d2899 100644 (file)
--- a/libs/gtkmm2ext/tabbable.cc
+++ b/libs/gtkmm2ext/tabbable.cc
@@ -69,9 +69,11 @@ Tabbable::use_own_window (bool and_pack_it)
        if (and_pack_it) {
                Gtk::Container* parent = _contents.get_parent();
                if (parent) {
+                       _contents.hide ();
                        parent->remove (_contents);
                }
                _own_notebook.append_page (_contents);
+               _contents.show ();
        }
 
        return win;
@@ -244,6 +246,7 @@ Tabbable::attach ()
 
                save_pos_and_size ();
 
+               _contents.hide ();
                _contents.get_parent()->remove (_contents);
 
                /* leave the window around */
@@ -255,6 +258,7 @@ Tabbable::attach ()
        _parent_notebook->set_tab_detachable (_contents);
        _parent_notebook->set_tab_reorderable (_contents);
        _parent_notebook->set_current_page (_parent_notebook->page_num (_contents));
+       _contents.show ();
 
        /* have to force this on, which is semantically correct, since
         * the user has effectively asked for it.
@@ -290,6 +294,7 @@ void
 Tabbable::hide_tab ()
 {
        if (tabbed()) {
+               _contents.hide();
                _parent_notebook->remove_page (_contents);
                StateChange (*this);
        }
@@ -304,6 +309,7 @@ Tabbable::show_tab ()
                        add_to_notebook (*_parent_notebook, _tab_title);
                }
                _parent_notebook->set_current_page (_parent_notebook->page_num (_contents));
+               _contents.show ();
                current_toplevel()->present ();
        }
 }