[gtkmm] Re: Gtk::TreeView performance

[Tim Evans <t evans aranz com>]

Igor Gorbounov wrote:
> Hi, All!
> My application uses a TreeView (using ListStore model) table to present 
> measured data
> once per second. This table has about 20 rows and about 40 columns.
> The problem is in consuming too much CPU resources (about 14% when the 
> table is
> switched on, and near 3% when it is switched off). The cells af this 
> tables display
> text, and the color of this text foreground and background is changed 
> depending on
> values in invisible cells.
> So is there any way to optimize this whole structure?
>    Igor Gorbounov

It might be faster if it's not having to recalculate sizes all the time. 
 You can set everything to some form of fixed-size mode using:

- CellRenderer::set_fixed_size(width, height)
- TreeViewColumn::set_sizing(TREE_VIEW_COLUMN_FIXED)
- setting the tree-view property "fixed-height-mode" to true

This is based on the gtkmm API docs, I haven't actually tried it, or 
even used gtkmm before.  I think that some of this may not be present in 
older versions of GTK.

--
Tim Evans
Applied Research Associates NZ
http://www.aranz.com/