The gadget library r3gad introduces new derived gadget type for managing integer data types. The gadget support expression evaluation and scaling canvas.

Example:

    #include <real/gadget/r3intg.h>

    myig = R3New(R3CLID_INTGADGET,
                 R3WGA_Parent, window,
		 R3GA_Text, "Foo",
		 R3INTGA_Int, 10,
		 R3INTGA_UnitConverter, unitconv,
		 R3TAG_END);