Making Rows In A Gtk Treeview Unselectable

I want to make select rows of a PyGTK Tree-view (coupled to a List Store) un-selectable and if possible,greyed out. Is there a way to do this?

Solution 1:

The right way to do this is by using gtk.TreeSelection.set_select_function. Regarding how to gray out rows, it's possible to make the renderers not sensitive for them (see sensitive=1 in the example below).

An example below:

import pygtk
pygtk.require('2.0')
import gtk


defmain():
    """Display treeview with one row not selectable."""
    window = gtk.Window()
    store = gtk.ListStore(str, bool)
    for row in (('A', True), ('B', False), ('C', True)):
        store.append(row)

    treeview = gtk.TreeView(store)
    renderer = gtk.CellRendererText()
    column = gtk.TreeViewColumn('Name', renderer, text=0, sensitive=1)
    treeview.append_column(column)
    window.add(treeview)

    selection = treeview.get_selection()
    selection.set_select_function(
        # Row selectable only if sensitivelambda path: store[path][1]
    )
    selection.set_mode(gtk.SELECTION_MULTIPLE)
    window.show_all()
    gtk.main()

if __name__ == '__main__':
    main()

Solution 2:

This is a bit hackish minimal code, but it will make it impossible to select the middle row ('B'). If you wish that the previous selection should be remembered it ought to be quite easy to just store which rows are selected at the end of the signal-callback and overwrite current selection if a bad row was selected.

As for the individual rows and making them grey, I'm not sure...but this example here seems to deal with it: http://coding.debuntu.org/python-gtk-treeview-rows-different-colors

import pygtk
pygtk.require('2.0')
import gtk

defclicked(selection):

    global selection_signal

    liststores, listpaths = selection.get_selected_rows()
    for selected_row in xrange(len(listpaths)):
        #The 1 looks for the 'B' rowif listpaths[selected_row][0] == 1:
            #Blocking the handler so that the reverting doesn't invoke a callback
            selection.handler_block(selection_signal)
            selection.unselect_path(listpaths[selected_row])
            selection.handler_unblock(selection_signal)


w = gtk.Window()
treemodel = gtk.ListStore(str)
for r in ('A', 'B', 'C'):
    treemodel.append([r])

treeview = gtk.TreeView(treemodel)
w.add(treeview)
tv_cell = gtk.CellRendererText()
tv_column = gtk.TreeViewColumn("Header", tv_cell, text=0)
treeview.append_column(tv_column)
selection = treeview.get_selection()
selection_signal = selection.connect("changed", clicked)
selection.set_mode(gtk.SELECTION_MULTIPLE)
w.show_all()