[pygtk] colored cell

[John Hunter]

I have a gtk.Treeview and I want to format negative numbers in red, as
you can do in excel for example.  I tried to use pango markup, as in
the example below, but was unsuccessful -- what is the best way to do
this?

import gobject
import gtk

mydata = [('GOOG', 0.05, -0.025), ('MSFT', 0.1, -0.1), ('AAPL', -0.05, 0.10)]
model = gtk.ListStore(gobject.TYPE_STRING, gobject.TYPE_STRING,
gobject.TYPE_STRING)


def tostr(gain):
    if gain<0: return '<span color="#FF00000">%1.1f</span>'%(100*gain)
    else: return '%1.1f'%(100*gain)

for ticker, gain1, gain2 in mydata:
    iter = model.append()
    model.set(iter, 0, ticker, 1, tostr(gain1), 2, tostr(gain2))

treeview = gtk.TreeView(model)
treeview.set_rules_hint(True)

column = gtk.TreeViewColumn('Ticker', gtk.CellRendererText(),
                            text=0)
treeview.append_column(column)

column = gtk.TreeViewColumn('Gain1', gtk.CellRendererText(),
                            text=1)
treeview.append_column(column)

column = gtk.TreeViewColumn('Gain2', gtk.CellRendererText(),
                            text=2)
treeview.append_column(column)



win = gtk.Window()
win.connect('destroy', lambda win: gtk.main_quit())
win.set_title('treeview demo')
win.add(treeview)


win.show_all()
gtk.main()