Gtk.Entry in Gtk.TreeView (CellRenderer)

Question

I want to pack a Gtk.Entry (with Gtk.EntryCompletion hooked up) into a cell in a Gtk.TreeView. Does anyone know how this can be done? (I just need entry completion on a text entry in a tabular view.)

Do I perhaps need to subclass Gtk.CellRenderer or Gtk.CellRendererText, and override the start_editing method (or similar)? I can find examples of subclassing Gtk.CellRenderer, but not modifying the editable behaviour. I can't find the source-code for the Gtk.CellRendererText class, either.

I'm using Gobject Introspection (i.e. from gi.repository import Gio, Gtk, GLib, Gdk).

Answer 1

Okay, I finally worked out how to do this.

class CellRendererAutoComplete(Gtk.CellRendererText):

    """ Text entry cell which accepts a Gtk.EntryCompletion object """

    __gtype_name__ = 'CellRendererAutoComplete'

    def __init__(self, completion):
        self.completion = completion
        Gtk.CellRendererText.__init__(self)

    def do_start_editing(
               self, event, treeview, path, background_area, cell_area, flags):
        if not self.get_property('editable'):
            return
        entry = Gtk.Entry()
        entry.set_completion(self.completion)
        entry.connect('editing-done', self.editing_done, path)
        entry.show()
        entry.grab_focus()
        return entry

    def editing_done(self, entry, path):
        self.emit('edited', path, entry.get_text())

Inspiration dervied from the PyGTK FAQ, and adapted to pygobject.

Answer 2

You shouldn't have to subclass, GTK+ rarely requires this. It might be more practical in Python (than in C) of course, if so it should be fine.

This page shows how to enable editing, by setting the editable property to TRUE.

You can use gtk_tree_view_set_cursor() to move the cursor to a cell and also to start editing programmatically.