Renders a extension (as in a #GtkNotebook tab) in the rectangle defined by x, y, width, height. The side where the extension connects to is defined by gap_side.
Typical extension rendering:
a #GtkStyleContext
a #cairo_t
X origin of the rectangle
Y origin of the rectangle
rectangle width
rectangle height
side where the gap is
Renders a extension (as in a #GtkNotebook tab) in the rectangle defined by x, y, width, height. The side where the extension connects to is defined by gap_side.
Typical extension rendering: