I added your code, and it DOES stop the display from resizing
widgets when the labels display small values, but it DOES NOT drop
cpu usage at all. so internally GTK+ is still going something with
regards to the labels.
If I comment out gtk_label_set_text() in my code cpu usage drops
from 45% to 4%. (dual cpu AMD 2.1Ghz, 3GB ram)
--- jcupitt@xxxxxxxxx wrote:
> On 3/26/07, David J. Andruczyk <djandruczyk@xxxxxxxxx> wrote:
> > I think the resizing is the culprit. I was tempted to use
> > gtk_entries instead as you can assign them fixed size in
> > charactors, which is easier to handle differences in font size.
>
> You can do that with a label too. Measure the size of the string
> "8",
> then call gtk_widget_set_size_request() to lock the label to 10
> (for
> example) 8s across by 1 8 down.
>
> I do this with:
>
> --------------------
> /* Calculate the bounding box for a string rendered with a
> widget's default
> * font. Set geo to a rect with 0,0 positioned on the left-hand
> baseline.
> */
> void
> get_geo( GtkWidget *widget, const char *text, Rect *geo )
> {
> PangoLayout *layout;
> int width, height;
>
> layout = gtk_widget_create_pango_layout( widget, text );
> pango_layout_get_pixel_size( layout, &width, &height );
> g_object_unref( layout );
>
> /* FIXME ... we left/top to 0 for now.
> */
> geo->width = width;
> geo->height = height;
> geo->left = 0;
> geo->top = 0;
> }
>
> /* Set a widget to a fixed size ... width in characters.
> */
> void
> set_fixed( GtkWidget *widget, int nchars )
> {
> Rect geo;
>
> get_geo( widget, "8", &geo );
> gtk_widget_set_size_request( widget, geo.width * nchars,
> geo.height );
> }
> ------------
>
> John
>
-- David J. Andruczyk
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