Font style in widget->size_request

[David Brigada <brigad rpi edu>]

Hello,

I am writing a graph widget for use in GTK+ applications.  I'm trying to 
calculate the minimum size for the widget from the text along the axes 
of the graph.  I use Cairo to draw the text, so I'm using the 
cairo_text_extents functions to calculate their sizes.

However, I'm running into a problem where widget->style->font_desc does 
not seem to be returning a valid Pango font description.  When I call 
pango_font_description_get_size on the font_desc, it returns 10 * 
PANGO_SCALE, which seems to be a default value when the style isn't 
initialized.  This causes my function to assume the incorrect font size 
when calculating its size request.  I tried calling 
gtk_widget_ensure_style on my widget before accessing the font_desc 
element, but that does not help.

Here's a code snippet:

static void gtk_graph_size_request(GtkWidget *widget,
		GtkRequisition *requisition)
{
	gdouble bfont_sz;
	/* ... */
	gtk_widget_ensure_style(widget);
	bfont_sz = pango_font_description_get_size(
			widget->style->font_desc) /
		(gdouble)PANGO_SCALE;

	/* bfont_sz here is 10, for my theme, it should be 13.3 */

	/* ... */
}

I'm running GTK+ 2.14.7, (2.14.7-4+b1 as shipped by Debian sid), GLib 
2.20.0 (2.20.0-2), ATK 1.24.0 (1.24.0-2), Pango 1.22.4 (1.22.4-3), and 
Cairo 1.8.6 (1.8.6-2+b1).

Let me know if you need any more information.  Thanks in advance for 
your help!

Thanks,
David Brigada