Has anyone been able to configure tooltips on the Chart widget?
My immediate requirement is a scatter plot, ideally with two different colours
of markers, and with a custom tooltip on each marker.
If I try to edit the 'data labels' in the chart property inspector, my edits
are immediately undone.
If I set the data points using the 'tsvData' property of the widget, and then
set labels using the 'dataLabels' property, the scales of the widget are reset
(so horizontal axis runs from 0 to 1.0, where before setting dataLabels, it
ran 0 to 3,000). All the markers disappear (even if I deliberately add a
datapoint within this range).
If I use the chartJsonData property, and include "options" as well as
"datasets" in the JSON I submit, setting it has no effect. (Whereas removing
that section from the JSON, setting the chartJsonData property does have an
effect.)
If I use the chartJsonData property to set points including "x", "y" and
"label" attributes for each, the data is accepted and the points appear in the
expected place. But the tooltip on each point is the x and y values, e.g.
"(30, 50)".
If I then use the chartOptionsData property I can modify scales, gridlines
etc. But if I include a "plugins" attribute defining a "tooltip" callback in
the JSON (definition copied from the interweb) then setting it has no visible
effect (possibly an error is thrown somewhere). But, from then on when
switching from tool mode to browser mode, the revErrorDisplay window pops open
with a report of the form:
LCB Error array key does not exist
Object BensChartWidget
LCB File chartlc.lcb
LCB Line 1873
Unfortunately, I can't locate a "chartlc.lcb" file in the package.
I'm a bit stumped. Is there a way to set a custom label for each point on a
scatter chart using this widget?
TIA,
Ben
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