MWAPI - SCROLLRANGE

Draft MDC Standard

SCROLLRANGE specifies the value range that a scroll gadget or long list box displays. The position of a scroll gadget’s value indicator or of a long list box’s position indicator is determined by the scroll value compared to the range specified by the SCROLLRANGE elattribute. The scrollmax component of the SCROLLRANGE value represents the position on the gadget that is farthest from the origin. For a scroll gadget, the scroll value is equal to the numeric value of the VALUE elattribute. For a long list box gadget, the scroll value is equal to the numeric value of the SCROLLPOS elattribute.

If an application attempts to assign a value to a scroll gadget’s VALUE elattribute or to a long list box’s SCROLLPOS elattribute that is greater than scrollmax, the VALUE or SCROLLPOS attribute is set to scrollmax. If an application attempts to assign a value to a scroll gadget’s VALUE elattribute or to a long list box’s SCROLLPOS elattribute that is less than scrollmin, the VALUE or SCROLLPOS attribute is set to scrollmin. If an application attempts to assign to a gadget’s SCROLLRANGE elattribute a value with scrollmax less than or equal to scrollmin, the effect is not specified.