Scale

A Scale is a standard Motif widget that either displays a value in a KxHistogram
or sets an integer-type Preference in a PreferencesDialog. A KxHistogram's Scale
is read-only; you cannot manipulate this kind of Scale with the mouse. A 
Preference Scale, on the other hand, is fully interactive. Click and drag the
slider to change the value of the Preference. If the range on the Scale is quite
large, the mouse tends to change the value fairly quickly. If you desire to make
smaller adjustments, first click and release the mouse in the middle of the 
Scale. Notice that the focus outline appears around the Scale. Now you can use 
the left and right arrow keys on the keyboard to make unit incremental 
adjustments.

While the Preferences control a KxHistogram's boundaries, the Preference Scale's
boundaries are set with resources in the app-defaults file. These resources 
(minimum and maximum) control the range available for a Scale in a Preferences-
Dialog. In other words, the range for a KxHistogram on the Overview Screen is 
set with its PreferencesDialog, but the range for a the Preference Scale is 
defined in the app-defaults file. For example, the maximum value for the upper 
boundaries for all Histograms are set with the following line in the default 
app-defaults file:

*preferences*histograms*max.maximum:    100

You can also change the minimum value (it defaults to 0). Each Histogram can be
configured separately. Summary and Overview Preferences can also be treated as
separate items. Note that these resources also apply to the Update Interval's 
Scale in the PreferencesDialog.

See also: KxHistogram, Preferences, PreferencesDialog
