Correct signal handler to overload in a treeview to STOP the selection from changing

["Huston, Bob" <rhuston mitre org>]

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