How to make ttk.Treeview's rows editable?

Question

Is there any way to use ttk Treeview with editable rows?

I mean it should work more like a table. For example on double click on the item make the #0 column 'editable'.

If this isn't possible, any way to allow mouse selecting on the item would be just fine. I haven't found any mention of this in tkdocs or other documents.

Answer 1

After long research I haven't found such feature so I guess there's any. Tk is very simple interface, which allows programmer to build 'high-level' features from the basics. So my desired behaviour this way.

def onDoubleClick(self, event):
    ''' Executed, when a row is double-clicked. Opens 
    read-only EntryPopup above the item's column, so it is possible
    to select text '''

    # close previous popups
    # self.destroyPopups()

    # what row and column was clicked on
    rowid = self._tree.identify_row(event.y)
    column = self._tree.identify_column(event.x)

    # get column position info
    x,y,width,height = self._tree.bbox(rowid, column)

    # y-axis offset
    # pady = height // 2
    pady = 0

    # place Entry popup properly         
    text = self._tree.item(rowid, 'text')
    self.entryPopup = EntryPopup(self._tree, rowid, text)
    self.entryPopup.place( x=0, y=y+pady, anchor=W, relwidth=1)

This is method within a class which composes ttk.Treeview as self._tree

And EntryPopup is then very simple sub-class of Entry:

class EntryPopup(Entry):

    def __init__(self, parent, iid, text, **kw):
        ''' If relwidth is set, then width is ignored '''
        super().__init__(parent, **kw)
        self.tv = parent
        self.iid = iid

        self.insert(0, text) 
        # self['state'] = 'readonly'
        # self['readonlybackground'] = 'white'
        # self['selectbackground'] = '#1BA1E2'
        self['exportselection'] = False

        self.focus_force()
        self.bind("<Return>", self.on_return)
        self.bind("<Control-a>", self.select_all)
        self.bind("<Escape>", lambda *ignore: self.destroy())

    def on_return(self, event):
        self.tv.item(self.iid, text=self.get())
        self.destroy()

    def select_all(self, *ignore):
        ''' Set selection on the whole text '''
        self.selection_range(0, 'end')

        # returns 'break' to interrupt default key-bindings
        return 'break'

Answer 2

You could also pop up a tool window with the editable fields listed with Entries to update the values. This example has a treeview with three columns, and does not use subclasses.

Bind your double click to this:

def OnDoubleClick(self, treeView):
    # First check if a blank space was selected
    entryIndex = treeView.focus()
    if '' == entryIndex: return

    # Set up window
    win = Toplevel()
    win.title("Edit Entry")
    win.attributes("-toolwindow", True)

    ####
    # Set up the window's other attributes and geometry
    ####

    # Grab the entry's values
    for child in treeView.get_children():
        if child == entryIndex:
            values = treeView.item(child)["values"]
            break

    col1Lbl = Label(win, text = "Value 1: ")
    col1Ent = Entry(win)
    col1Ent.insert(0, values[0]) # Default is column 1's current value
    col1Lbl.grid(row = 0, column = 0)
    col1Ent.grid(row = 0, column = 1)

    col2Lbl = Label(win, text = "Value 2: ")
    col2Ent = Entry(win)
    col2Ent.insert(0, values[1]) # Default is column 2's current value
    col2Lbl.grid(row = 0, column = 2)
    col2Ent.grid(row = 0, column = 3)

    col3Lbl = Label(win, text = "Value 3: ")
    col3Ent = Entry(win)
    col3Ent.insert(0, values[2]) # Default is column 3's current value
    col3Lbl.grid(row = 0, column = 4)
    col3Ent.grid(row = 0, column = 5)

    def UpdateThenDestroy():
        if ConfirmEntry(treeView, col1Ent.get(), col2Ent.get(), col3Ent.get()):
            win.destroy()

    okButt = Button(win, text = "Ok")
    okButt.bind("<Button-1>", lambda e: UpdateThenDestroy())
    okButt.grid(row = 1, column = 4)

    canButt = Button(win, text = "Cancel")
    canButt.bind("<Button-1>", lambda c: win.destroy())
    canButt.grid(row = 1, column = 5)

Then confirm the changes:

def ConfirmEntry(self, treeView, entry1, entry2, entry3):
    ####
    # Whatever validation you need
    ####

    # Grab the current index in the tree
    currInd = treeView.index(treeView.focus())

    # Remove it from the tree
    DeleteCurrentEntry(treeView)

    # Put it back in with the upated values
    treeView.insert('', currInd, values = (entry1, entry2, entry3))

    return True

Here's how to delete an entry:

def DeleteCurrentEntry(self, treeView):
    curr = treeView.focus()

    if '' == curr: return

    treeView.delete(curr)