Generic Function | Package: cg | ToC | DocOverview | CGDoc | RelNotes | FAQ | Index | PermutedIndex
| Allegro CL version 9.0 Unrevised from 8.2 to 9.0. 8.2 version

## chart-items-min-index

Arguments: chart-widget

Returns the value of the chart-items-min-index property of a `chart-widget`. The value may be set at creation time by passing the `:chart-items-min-index` initarg, or any time later by calling (setf chart-items-min-index).

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

If set-chart-value has been used to add items to the chart, then any item whose index is less than this property value (if it is a number) will not appear in the chart. 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 chart-value-returner function is used for looking up chart data, then this property could be used if your function handles a range of item indeces that does not begin at zero.

To permanently remove older items rather than temporarily excluding them from view, use chart-items-limit.

See also chart-items-max-index.

See `chart-widget` and also cg-chart-widget.htm.

Copyright (c) 1998-2019, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.2 page.
Created 2012.5.30.

|  | ToC | DocOverview | CGDoc | RelNotes | FAQ | Index | PermutedIndex
| Allegro CL version 9.0 Unrevised from 8.2 to 9.0. 8.2 version