[Java-gnome-developer] RE: TreeView & TreeStore and Listeners

[Jeff L. <jef...@ho...>]

The getSelected( ) method is not implemented as you would expect.  It maps 
to
the ...is_selected( ) call in C.  There is a forEach( ) mechanism that 
allows you to
iterate over the selected rows in a TreeSelection.  Mark Howard uses it in

http://www.tildemh.com/sw/debbuggtk/index.shtml

I think there should be an isSelected( ) mapped to ...is_selected and a 
getSelected( )
mapped to ...get_selected( ).  I modified TreeSelection to do this, and it 
seemed to work.
I did not try to pass back the model, as ...get_selected( ) does.  There is 
no reverse
mapping from the C GtkTreeModel handle to the Java TreeModel.

Looks like this is a problem elsewhere, too.  For instance, a call to
Container.getChildren( ) returns a list of Widgets.  New, generic Widgets.  
I can't do
much with them because they can not be downcast to their actual types.

Is there a global mapping from handle back to Widget?  Couldn't find one, 
but it
seems like this is the only real answer to wrapping API calls that return 
widgets.
Something like (not complete):

GObject.java...

public GObject(int handle) {
  this.handle = handle;
  revMap.put( new Integer( handle ), this );
}

Container.java...

public Widget[] getChildren() {
    int[] hndls = gtk_container_get_children(handle);
    if (null == hndls)
        return null;
    Widget[] widgets = new Widget[hndls.length];
    for (int i = 0; i < hndls.length; i++) {
        widgets[i] = (Widget)revMap( new Integer( hndls[i] );
    }
    return widgets;
}



- Jeff

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