GtkCellRendererText::set_fixed_height_from_font
void set_fixed_height_from_font(int
number_of_rows);
Sets the height of the renderer to a value determined by its current
font and
y_pad values.
number_of_rows specifies the number of rows of text
each cell renderer should be allocated. If
number_of_rows is -1, the fixed
height will be unset and the height will be determined by the properties
again.
This method is unflexible, and should really only be used if calculating
the size of a cell is too slow (ie, a massive number of cells displayed).