Scrollbars

Unlike the standard, brain-dead scrollbars provided by everybody else, JXScrollbar does far more than just scroll a widget:

• Holding down the Shift key makes the arrows scroll a half page at a time.
• An increment/decrement arrow pair is provided at each end if there is space.
• Scrolltabs provide a way to save particular positions.

The first two features conveniently package all the basic scrolling functions in one place, so one does not have to move the mouse all the way to the other end of the scrollbar if one overshoots by a couple of lines.

Scrolltabs

User's action	Scrollbar's response
Meta-left-click on scrollbar thumb	Place a scrolltab
Left-click on scrolltab	Jump to the saved position
Meta-left-click on scrolltab	Remove it
Meta-Shift-left-click on scrolltab	Remove all scrolltabs

For maximum usefulness, it is strongly recommended that the JXScrollableWidget catch Ctrl-1 through Ctrl-9 and call ScrollToTab() on the more useful scrollbar (usually the vertical one) so the user doesn't have to use the mouse to jump around. (Meta-1 through Meta-9 are reserved for use by JXDocumentMenu.)

Of course, this feature would not be complete without the following:

• By calling PrepareForLowerMaxValue(), PrepareForHigherMaxValue(), and PrepareForScaledMaxValue(), JXScrollableWidgets can keep the scrolltabs in sync with their contents.

• ReadSetup() and WriteSetup() allow programs to save the scrolltabs between sessions.