[pygtk] Bug in TreeView.scroll_to_cell()

[Alessandro Pellizzari]

Greetings,

today I found what seems to be a bug in scroll_to_cell() of a TreeView.

I use select_path() to select a particular cell (just modified by the
user through another window), and scroll_to_cell() to show the selected
cell on the treeview.

My treeview has about 1500 rows.

It works pretty good until circa row 900, showing the cell at the top of
the treeview, then it begins going wrong, showing cell 930 (or similar)
at the top and not scrolling down, even for cell, e.g., 1200, which goes
out of the visible area.

I googled a partial solution (for a bug in Gtk 2.0.x), putting 

while gtk.events_pending():
  gtk.mainiteration()

before scroll_to_cell, but it shows the cell in the middle of the view
for a while (about cells 900-1000), scrolling down slowly, then always
show the cell as the last in the view.

The full code is:

if (self.magaddpath != 0):
  # print self.magaddpath
  selection = self["tv_mag_list"].get_selection()
  while gtk.events_pending():
    gtk.mainiteration()
  
  self["tv_mag_list"].scroll_to_cell(self.magaddpath)
  selection.select_path(self.magaddpath)
  self.on_tv_mag_list_selected()
  self.magaddpath=0


Is it a known bug? Is there a workaround, maybe to show always in the
middle or on top?

I use gtk 2.8.18 and pygtk 2.8.2, python 2.3.5 on a Debian etch

Thank you very much.



-- 
Alessandro Pellizzari