Re: Problem with GTK fonts

[James Henstridge <james daa com au>]

Victor Vicente Mateos wrote:

> Hi!
>
> I've got a problem with fonts in GTK. I've made a simple example which consist 
> on a main window with a label. With a button press in the main window, a 
> GtkFontSelectionDialog appears to select a font to apply to the label. I 
> think I do the process correctly, but when I change sometimes the font, a 
> violation-segment occurs and the following error message: 
>
> GLib-CRITICAL **: file gcache.c: line 160 (g_cache_remove) : assertion `node 
> != NULL` failed
This question should probably have been sent to gtk-app-devel-list 
instead.  This list is for discussion of development _of_ gtk, rather 
than _with_ gtk.  My comments are below.

> static gint accept_cb (GtkWidget *widget, gpointer data)
> {
>  GtkFontSelectionDialog *dlg;
>  GtkStyle *style;
>
>  dlg = GTK_FONT_SELECTION_DIALOG (data);
>
>  style = gtk_style_copy (gtk_widget_get_style (GTK_WIDGET (data)));
>  style->font = gtk_font_selection_dialog_get_font (dlg);
This bit should be:
 gdk_font_unref(style->font);
 style->font = gdk_font_ref(gtk_font_selection_dialog_get_font(dlg));

Note that use of GdkFont objects is deprecated now, so a better way to 
achieve this is to replace the style modification code with:
 font_name = gtk_font_selection_dialog_get_font_name(dlg);
 font_desc = pango_font_description_from_string(font_name);
 gtk_widget_modify_font(GTK_WIDGET(label), font_desc);
 pango_font_description_free(font_desc);
 g_free(font_name);


James.

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