On Sat, 2005-01-15 at 15:27 +0100, Nemesis wrote:
> On Fri, 14 Jan 2005 11:31:17 +0000
> "Gustavo J. A. M. Carneiro" <[EMAIL PROTECTED]> wrote:
>
> > > f=open("list.dat","rb")
> > > list=cPickle.load(f)
> > > f.close()
> > > for item in list:
> > > model.append(item)
> > >
> > > This algorithm is very slow it takes about ten minutes on my
> > > [EMAIL PROTECTED] I also used the "fixed-height-mode" but nothing
> > > changed.
> > >
> > > Is there a way to improve the speed of this operation?
> >
> > Try using a GenericTreeModel (see pygtk examples),
>
> I tried with this solution:
>
> ------------------------Code Snippet----------------------------------
> class Custom_List(gtk.GenericTreeModel):
> def __init__(self,list=[]):
> gtk.GenericTreeModel.__init__(self)
> self.list=list
>
> def on_get_flags(self):
> return gtk.TREE_MODEL_LIST_ONLY|gtk.TREE_MODEL_ITERS_PERSIST
>
> def on_get_n_columns(self):
> return 2
>
> def on_get_column_type(self, index):
> return gobject.TYPE_STRING
>
> def on_get_iter(self, path):
> return self.list[path[0]]
>
> def on_get_path(self, rowref):
> return self.list.index(rowref)
>
> def on_get_value(self, rowref, column):
> return rowref[column]
>
> def on_iter_next(self, rowref):
> try:
> i = self.list.index(rowref)+1
> return self.list[i]
> except IndexError:
> return None
>
> def on_iter_children(self, parent):
> return None
>
> def on_iter_has_child(self, rowref):
> return False
>
> def on_iter_n_children(self, rowref):
> return 0
>
> def on_iter_nth_child(self, parent, n):
> return None
>
> def on_iter_parent(self, child):
> return None
> ------------------------Code Snippet----------------------------------
>
> But it is much slower than the ListStore solution :-/
Even with fixed-height-mode turned on? I was thinking that if
TreeView would only ask for the items that fit in view, then you'd need
to get less than 100 items at a time, instead of 400000, hence the speed
improvement.
So, something must be failing. I see you defined on_iter_n_children
to always return 0. Are you sure about this?!
>
>
> > or TreeViewColumn.set_cell_data_func().
>
> I can't figure how to use set_cell_data_func for this purpose
>
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