Generic FunctionPackage: cgToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 8.1
This page is new in 8.1. Moderate update since 8.1 release.

base-value

Arguments: bar-chart-view

Returns the value of the base-value property of a bar-chart-view. The value may be set at creation time by passing the base-value initarg, or any time later by calling (setf base-value).

The default value for the start of each bar in bar-chart-view in a chart-widget. The value should be a real number. The default value is zero.

Each bar in a bar-chart-view starts at one value on the value-axis and ends at another value. The ending value of a bar is always the main data value for a chart item / chart object pairing that a single bar represents. A "main data value" is the one that is passed as the value argument to set-chart-value or returned from a chart-value-returner function when the value-type argument is :value. The starting value of a bar will be the from-value if one was supplied for the bar, and otherwise it will default to the base-value of the bar-chart-view. The base-value defaults to zero, so every bar by default will start at zero on the value-axis and end at the main value for the bar.

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


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Documentation for Allegro CL version 8.1. This page is new in the 8.1 release.
Created 2007.4.30.

ToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 8.1
This page is new in 8.1. Moderate update since 8.1 release.