I have a treeview
derived class, in which when a branch in the tree is displayed I display a
notebook derived
class showing many GUI controls for information gathering.
When
the user selects a
different branch in the tree, I save off the currently displayed notebook
information
and display a new
notebook for the new branch that is selected.
I accomplish this by
overloading the on_cursor_changed signal handler in the tree view
class.
The issue I am
having is that when I am switching notebooks being displayed I validate any and
all
information on the
current notebook, if the information is valid, I want to warn the user
via and keep the
tree from switching
views.
I am not switching
the notebooks when this occurs, however the tree is still switching which branch
is selected.
My code basically is
this:
void
CMyTreeView::on_cursor_changed()
{
// save/validate the current notebook:
if ( !SaveCurrentNotebook())
return;
// put up the new notebook
.....
return Gtk::TreeView::on_cursor_changed();
}
I need to know how
to either return from this handler so that the selection doesn't change, or a
different handler
to overload to do my
processing prior to the selection change occurs. I thought that by not
allowing the
parent tree view
class's version of on_cursor_changed to be called that this would
happen.
--Bob
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