| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
Arguments: line-graph-view
Returns the value of the span-missing-items property of
a line-graph-view
. The value
may be set at creation time by passing
the span-missing-items
initarg, or any
time later by calling (setf span-missing-items).
A boolean value indicating whether line segments will be drawn across
chart items that have no values in a line-graph-view
of a chart-widget
. The default value
is nil
.
The chart-widget allows any combination of a chart item and chart object to either have a value or not. When there is no value, nothing is drawn on the chart for that chart item and object.
A special case is that a chart object may have no value for a sequence of one or more chart items, but have values for items on both sides of that sequence of items. This raises the question as to whether a line should be drawn between the groups of items that do have values.
If span-missing-items is true,
then a single straight line is drawn between the last chart item
before the sequence of non-value items and the first item after the
no-value items. If span-missing-items
is nil
, then no such line is drawn, and lines
will connect only contiguous items that all have values.
This property is used only when the draw-lines property is true.
See chart-widget
and also cg-chart-widget.htm.
Copyright (c) 1998-2016, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.1 page.
Created 2010.1.21.
| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |