python ttk treeview: how to select and set focus on a row?

Question

I have a ttk.Treeview widget with some rows of data. How do I set the focus to and select (highlight) a specified item?

tree.focus_set()

does nothing

tree.selection_set(0)

complains that: Item 0 not found, although the widget is plainly populated with more than zero items. Trying item 1 does no better.

EDIT: to select an item, find its id, then use tree.selection_set(id). Neither tree.focus(id) nor tree.focus_set(id) appears to do anything.

score 14 · Answer 1 · edited Nov 05 '18 at 12:30

14

Get the id of treeview item you want to highlight/select

child_id = tree.get_children()[-1] # for instance the last element in tuple

To highlight the item, use both focus() and selection_set(item_id)

tree.focus(child_id)
tree.selection_set(child_id)

edited Nov 05 '18 at 12:30

itsmysterybox

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answered Nov 05 '18 at 10:38

Cat

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tree.selection_set(iid) works for me, focus does not. (Neither focus(iid) nor focus_set(iid)). I'm using Python 3.6.8. What I find surprising is that you can selection_set() before entering mainloop() – testalucida Aug 06 '19 at 07:19
On python 3.10.6 I read the selected item using selected = tree.focus() before sorting a column, after I select the item again with tree.focus(selected) and tree.selection_set(selected) and it works. – Jack Griffin Dec 29 '22 at 10:45

score 3 · Answer 2 · answered Apr 27 '16 at 21:25

3

Come across this question when I'm looking to solve the exact same problem.

Found out this:

tree.selection_set(item) highlights the item

tree.focus(item) or tree.focus_set(item) selects the item

answered Apr 27 '16 at 21:25

Richard Wong

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`tree.selection_set(item)` and `tree.focus(item)` worked for me. I'm using Python 2.7. Thanks! – Joe Jul 27 '18 at 13:15

score 3 · Answer 3 · answered Oct 22 '11 at 20:46

3

Note: I haven't worked with python.

Looking at this link, the focus method with optional parameter item, should highlight the node.

If not, look at selectmode option & set it to "browse".

answered Oct 22 '11 at 20:46

shahkalpesh

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focus doesn't seem to work. selection_set() wants an item id, not a position, which can be obtained when inserting or by iterating tree.get_children(). +1 for forcing me to re-read the docs. This get me highlight, but not focus. – foosion Oct 22 '11 at 21:00

score 2 · Answer 4 · answered Apr 19 '19 at 11:00

def mycallback(event):
    _iid = treeview.identify_row(event.y)
    global  last_focus
    if _iid != last_focus:
        if last_focus:
            treeview.item(last_focus, tags=[])
        treeview.item(_iid, tags=['focus'])
        last_focus = _iid

treeview.tag_configure('focus', background='red')
global last_focus
last_focus = None
treeview.bind("<Motion>", mycallback)

score 1 · Answer 5 · answered Dec 29 '17 at 23:01

1

Use tree.selection_add(item_iid)

The reason why tree.selection_set(0) doesn't work is because 0 is not the item iid, it's the index you're referring to and Treeview is expecting an iid.

answered Dec 29 '17 at 23:01

Drew Wilkins

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python ttk treeview: how to select and set focus on a row?

5 Answers5

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