TreeViews emit a large number of signals
that you can use to track changes in the view of the model. The signals
generally fall into the following categories:
The "test-collapse-row" and "test-expand-row" signals are emitted
before a row is collapsed or expanded. The return value from your callback
can cancel or allow the operation -
TRUE to allow and
FALSE to cancel.
def callback(treeview, iter, path, user_data)
iter is a
path is a tree
path pointing at the row and
user_data is the data
specified in the
The "row-activated" signal is emitted when a double click occurs on a row or a non-editable row is selected and one of the keys: Space, Shift+Space, Return or Enter is pressed.
The rest of the signals are emitted after the
TreeView has changed. The cursor is the row outlined
by a box. In most cases moving the cursor also moves the selection. The
cursor can be moved independently by Control+Down or
Control+Up and various other key combinations.
See the PyGTK
Reference Manual for more information on the