Re: Failure to add radio buttons to popup menu.

[Carlo Wood <carlo alinoe com>]

On Tue, 8 Dec 2020 08:41:58 +0100
Kjell Ahlstedt <kjellahlstedt gmail com> wrote:

> I don't know if it works with a file that glade has written.

That sounds like you don't support glade. I am confused, because
I thought that glade was the defacto standard that Gnome wants
users to generate user interfaces.

gtkmm *does* have gtkmm: Gtk::Builder::add_from_file - and
I though that was intended to read those glade generated files.

Having a closer look at it documentation, it says:
Parses a file containing a GtkBuilder UI definition [...]

which seems to be described here:
https://developer.gnome.org/gtk3/stable/GtkBuilder.html#BUILDER-UI
which says
"GtkBuilder parses textual descriptions of user interfaces which are
specified in an XML format which can be roughly described by the RELAX
NG schema below. [...]  It is common to use .ui as the filename
extension for files containing GtkBuilder UI definitions."

But, the example that follows on that page:

<interface>
  <object class="GtkDialog" id="dialog1">
    <child internal-child="vbox">
      <object class="GtkBox" id="vbox1">
        <property name="border-width">10</property>
        <child internal-child="action_area">
          <object class="GtkButtonBox" id="hbuttonbox1">
            <property name="border-width">20</property>
            <child>
              <object class="GtkButton" id="ok_button">
                <property name="label">gtk-ok</property>
                <property name="use-stock">TRUE</property>
                <signal name="clicked" handler="ok_button_clicked"/>
              </object>
            </child>
          </object>
        </child>
      </object>
    </child>
  </object>
</interface>

... looks exactly like my .glade file, and nothing like what
you are using:

  Glib::ustring ui_info =
    "<interface>"
    "  <menu id='menu-examplepopup'>"
    "    <section>"

> Can't
> glade write files without GtkMenu, GtkRadioMenuItem, etc? If it
> can't, it's not compatible with gtk4 and gtkmm4, at least not when it
> comes to creating menus. Classes like GtkMenuBar, GtkMenu,
> GtkMenuItem, GtkRadioMenuItem have been removed from gtk4.

But as stated before I am using gtkmm3.
So it seems perfectly fine to still GtkMenu etc. The file
format can and is parsed by GtkBuilder; it just doesn't work
with radio buttons.

A bug?