tkinter Treeview: get selected item values

Question

I'm just starting with a small tkinter tree program in python 3.4.

I'm stuck with returning the first value of the row selected. I have multiple rows with 4 columns and I am calling a function on left-click on a item:

tree.bind('<Button-1>', selectItem)

The function:

def selectItem(a):
    curItem = tree.focus()
    print(curItem, a)

This gives me something like this:

I003 <tkinter.Event object at 0x0179D130>

It looks like the selected item gets identified correctly. All I need now is how to get the first value in the row.

tree-creation:

from tkinter import *
from tkinter import ttk

def selectItem():
    pass

root = Tk()
tree = ttk.Treeview(root, columns=("size", "modified"))
tree["columns"] = ("date", "time", "loc")

tree.column("date", width=65)
tree.column("time", width=40)
tree.column("loc", width=100)

tree.heading("date", text="Date")
tree.heading("time", text="Time")
tree.heading("loc", text="Loc")
tree.bind('<Button-1>', selectItem)

tree.insert("","end",text = "Name",values = ("Date","Time","Loc"))

tree.grid()
root.mainloop()

Estate

Could you add the code for creating the tree? (or something shorter but similar if it is too long) – Enterectomy

added the tree-creation script. It's not my whole program but the basi cpart of it. – Estate

It seems like the callback is executed before the focus in the tree changes, so you always get the previously selected value. – Enterectomy

Thanks for the advice, that might be true, but the first problem I have is still : how du i return the value in the first column of the selected row? – Estate

Answer 1

To get the selected item and all its attributes and values, you can use the item method:

def selectItem(a):
    curItem = tree.focus()
    print tree.item(curItem)

This will output a dictionary, from which you can then easily retrieve individual values:

{'text': 'Name', 'image': '', 'values': [u'Date', u'Time', u'Loc'], 'open': 0, 'tags': ''}

Also note that the callback will be executed before the focus in the tree changed, i.e. you will get the item that was selected before you clicked the new item. One way to solve this is to use the event type ButtonRelease instead.

tree.bind('<ButtonRelease-1>', selectItem)

Enterectomy

how to get particular value from output dictionary? can you please explain. – Self

Perfect, simple, useful – Anytime

Nisarg Parekh: tree.item(curItem, 'text') and tree.item(curItem)['text'] will both retrieve the 'text' element for that item. If you want to alter the other columns one at a time, instead of using tree.item(curItem, 'values') or tree.item(curItem, values=['new', 'values', 'here']) you can use tree.set(curItem, 'time') to retrieve or tree.set(curItem, time='value') to change. – Recommendation

ttk.treeview.focus() returns the current focus item. That means the item that was last selected. ttk.treeview.selection() returns a tuple of all the selected items. – Lamanna

Answer 2

This is a good example of getting information of a row selected in a python tkinter treeview. Allow me to represent a final neat coding discussed here. I use python 3.8

from tkinter import *
from tkinter import ttk

def selectItem(a):
    curItem = tree.focus()
    print(tree.item(curItem))

root = Tk()
tree = ttk.Treeview(root, columns=("size", "modified"))
tree["columns"] = ("date", "time", "loc")

tree.column("date", width=65)
tree.column("time", width=40)
tree.column("loc", width=100)

tree.heading("date", text="Date")
tree.heading("time", text="Time")
tree.heading("loc", text="Loc")
tree.bind('<ButtonRelease-1>', selectItem)

tree.insert("","end",text = "Name",values = ("Date","Time","Loc"))

tree.grid()
root.mainloop()

Ther result is

{'text': 'Name', 'image': '', 'values': ['Date', 'Time', 'Loc'], 'open': 0, 'tags': ''}

You can copy, paste and try it. It's good.

Bridgers

Answer 3

And if you want to get row as {column name:value pair}:

def selectItem(a):
    curRow = tree.set(a)
    loc_value = curRow["loc"]

Or you want to get cell value by column name

def selectItem(a):
    loc_value = tree.set(a, column="loc")

Oversubtle

Answer 4

ttk.treeview.focus() returns the current focus item. That means the item that was last selected.

ttk.treeview.selection() returns a tuple of all the selected items.

Lamanna