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Allegro CL version 8.1
New since 8.1 release.


This functionality was added in an update released in the Fall of 2008. You must have that update to use this functionality. See sys:update-allegro for information on getting updates.

Arguments: plot-widget

Returns the value of the plot-values-min-index property of a plot-widget. The value may be set at creation time by passing a plot-values-min-index initarg to make-instance, or any time later by calling (setf plot-values-min-index).

plot-values-min-index is the index of the first plot value of a plot-widget that should be displayed at the current time. The value should be a non-negative integer, or else nil to default to zero. The default value is nil.

If set-plot-value has been used to add items to the plot, then any item whose index is less than this property value (if it is a number) will not appear in the plot. When the property value is nil or zero, then no items are excluded. This property can be used to display only a subset of collected values that are of interest at the moment.

If instead a plot-value-returner function is used for looking up plot data, then this property could be used if your function handles a range of value indices that does not begin at zero.

See also plot-values-max-index.

Copyright (c) 1998-2009, Franz Inc. Oakland, CA., USA. All rights reserved.
Documentation for Allegro CL version 8.1. This page is new in the 8.1 release.
Created 2007.4.30.

Allegro CL version 8.1
New since 8.1 release.