Up_gtkFontGravitySet
_gtkFontGravitySet sets the gravity of a Font object.
Prototype : fun [ObjGtkFont I] ObjGtkFont
- ObjGtkFont : a Font object.
- I : the gravity value :
- FONT_GRAVITY_SOUTH : default
- FONT_GRAVITY_EAST : 90 degrees clockwise
- FONT_GRAVITY_NORTH : upside-down
- FONT_GRAVITY_WEST : 90 degrees counter-clockwise
- FONT_GRAVITY_AUTO : from the context matrix
- Return ObjGtkFont : the same Font object or nil if an error occurs.