[Java-gnome-developer] ComboBoxEntry and ClassCastException

[Marco A. P. S. <map...@gm...>]

Hi,

I'm just starting with Java-Gnome and GTK, and I have some questions about
ComboBoxEntry.
I'm developing an application in wich I would do the following:

1) clear the text in the Entry associated with the ComboBoxEntry when the
user clicks a button
2) prevent the user from directly edit the Entry associated with that
ComboBox (setting that Entry "editable" property to false)

In order to do number 1 above, I've tried to do the following:

Entry entry= (Entry) (combo_box_entry.getChild());
entry.setText("");

which yelds a ClassCastException in the first line.
Am I doing something wrong? I've read somewhere that ComboBox is a Bin, and
thus it's child Entry is available through getChild()...is this right?

Any help is appreciated. Thanks in advance!

-- 
Marco Antonio Porcho Souza