[gtkmm] Segfault at changing button label

["Jeffrey Rush" <rushjeffrey hotmail com>]

Hello everyone,

I'm still having troubles when trying to change the label of
a togglebutton. I have following code segment:
...
Gtk::ToggleButton *mytogglebutton = manage(new class 
Gtk::ToggleButton("Test"));
...
Gtk::Label *testlabel (dynamic_cast<Gtk::Label 
*>(mytogglebutton->get_child()));
if (testlabel != NULL)
 testlabel->set("New label text");

I get a segmentation fault (debugger 'pointing' to that get_child routine).
What am I doing wrong? Or is there a problem with dynamic_cast?
Thanks for helping!

Bye,
Jeffrey Rush.


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