Explanation: This program is simple compared to previous one with the difference that two Choice
instances are being worked with, instead of one.
16.4.7 The Scrollbar Class
The scrollbar class embodies a scroll bar, a familiar user-interface object. A scroll bar provides a convenient
means for allowing a user to select from a range of values. A scroll bar can be either horizontal or vertical.
It has fi ve parts as shown in Figure 16.24.
Page-up region
Page-down region
Tab
Down-arrow
Up-arrow
Figure 16.24 Scrollbar and its parts
The position of the tab specifi ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month, and much more.