Updates to the widget do not happen synchronously. Please make sure
your "Intense Database Query" is done within a thread so that gtk can
continue to draw from its main loop when the tree model is updated.
If you get to the point where you are doing thousands of additions to the
model, you may want to consider removing the model from the treeview, doing
the updates, and then re-attaching the model. This will speed up the UI
because many of the model events (such as row added) do not need to be
handled by the treeview.
-- Christian
On Dec 24, 2008 12:43pm, Andy Selvig <ajsel...@gmail.com> wrote:
Try calling QueueDraw() after the ShowAll() on the tree view. ShowAll()
just makes sure everything is visible, but Gtk will wait until the
application is idle before it redraws.
On Tue, Dec 23, 2008 at 3:32 PM, fourthirtysix fourthirty...@yahoo.com>
wrote:
Hello, I should first disclose that I'ma very novice programmer working on
my first GUI app ever!
I have an app using a TreeView/TreeStore to display a table with 8 columns
and about 5 rows.
The program loads with a blank window. I click on one button, and 3 of
the 8
columns are populated with data for all 5 rows.
Next, I click a second button, and for each of the 5 rows, an intensive
database routine is performed to get data to update the rest of the empty
places in each row.
I iterate through a list of the five rows, running the database search
seperately for each one and using the TreeView Models SetValue function to
update each row. I call treeview.ShowAll() for each iteration to do the
refresh.
My problem is: The treeview is supposed to update each time a result is
found (5 times in total, one for each row). I do this to show the user
that
progress is being made. Unfortunately, both the data and that statusbar
functions that I am calling wait until all of the intensive data searches
are done before refreshing.
Basically, it waits until everything is done, and then refreshes. Is GTK
just slow? is it Mono? Is there a way to get the screen to refresh even
though I'm running a heavy load operation between refreshes?
help!
thanks :-D
-mwp
--
View this message in context:
http://www.nabble.com/Newbie%27s-TreeView-updates-*very*-slowly-tp21151505p21151505.html
Sent from the Mono - Gtk# mailing list archive at Nabble.com.
_______________________________________________
Gtk-sharp-list maillist - Gtk-sharp-list@lists.ximian.com
http://lists.ximian.com/mailman/listinfo/gtk-sharp-list
_______________________________________________
Gtk-sharp-list maillist - Gtk-sharp-list@lists.ximian.com
http://lists.ximian.com/mailman/listinfo/gtk-sharp-list
