HasScrolling

February 24, 1996

Mixes in with Viewable

Class Description

The HasScrolling mixin provides you ways of creating subclasses of objects that can scroll. Any object that can scroll will inherit from the HasScrolling mixin.

Programming information

Instantiate: never
Subclass: sometimes
Call its methods: often

Since HasScrolling is a mixin, you'll never work directly with HasScrolling objects. Instead, you'll work with objects of classes that inherit from HasScrolling, such as NameCard.

Methods defined by class HasScrolling

Class HasScrolling defines the following methods:

Method	Description
PageDown	Scrolls down by 3/4 of object bounds; override to change scroll amount
PageLeft	Scrolls left by 3/4 of object bounds; override to change scroll amount
PageRight	Scrolls right by 3/4 of object bounds; override to change scroll amount
PageUp	Scrolls up by 3/4 of object bounds; override to change scroll amount
ScrollToBeginning	Sets scroll position to beginning
ScrollToEnd	Sets scroll position to end
ScrollToTop	Sets scroll position to top edge
ScrollToBottom	Sets scroll position to bottom edge
ScrollToLeft	Sets scroll position to left edge
ScrollToRight	Sets scroll position to right edge

Fields defined by class HasScrolling