a #GtkStyleContext
a #cairo_t
X origin of the rectangle
Y origin of the rectangle
rectangle width
rectangle height
side where the gap is
initial coordinate (X or Y depending on @gap_side) for the gap
end coordinate (X or Y depending on @gap_side) for the gap
3.0
Renders a frame around the rectangle defined by (@x, @y, @width, @height), leaving a gap on one side. @xy0_gap and @xy1_gap will mean X coordinates for %GTK_POS_TOP and %GTK_POS_BOTTOM gap sides, and Y coordinates for %GTK_POS_LEFT and %GTK_POS_RIGHT.
Typical rendering of a frame with a gap: