A monospace font is a font designed for text display where the the
characters form a regular grid. For Western languages this would
mean that the advance width of all characters are the same, but
this categorization also includes Asian fonts which include
double-width characters: characters that occupy two grid cells.
g_unichar_iswide() returns a result that indicates whether a
character is typically double-width in a monospace font.
The best way to find out the grid-cell size is to call
pango_font_metrics_get_approximate_digit_width(), since the results
of pango_font_metrics_get_approximate_char_width() may be affected
by double-width characters.
A monospace font is a font designed for text display where the the characters form a regular grid. For Western languages this would mean that the advance width of all characters are the same, but this categorization also includes Asian fonts which include double-width characters: characters that occupy two grid cells. g_unichar_iswide() returns a result that indicates whether a character is typically double-width in a monospace font.
The best way to find out the grid-cell size is to call pango_font_metrics_get_approximate_digit_width(), since the results of pango_font_metrics_get_approximate_char_width() may be affected by double-width characters.