Heatmap addData 6.1.2 not updating correctly.

[garybrain]

Expected behaviour

Ajax addData should update the Heatmap with new data.

Actual behaviour

graph update deformed on update.

Live demo with steps to reproduce

Working with 6.0.3 : http://jsfiddle.net/gvnLu3f8/4/ ( Alexander / Tuesday = 100 )
No working using 6.1.0 to current : http://jsfiddle.net/gvnLu3f8/3/

Product version

Highcharts v6.1.2 (2018-08-31)

Affected browser(s)

All.

[KacperMadej]

Hi @garybrain

Thank you for reporting about the regression.

Last working version is 6.0.7.
Broken since version 6.1.0.
Offending commit 7a74166

As a workaround please use version 6.0.7

[KacperMadej]

Simplified demo: http://jsfiddle.net/BlackLabel/rbkv9d2a/

Details of the problem:
Points are wrongly expected to have unique x values. Some series types like heatmap, scatter, etc. might not have unique x values.

Code causing the problem:

highcharts/js/parts/Series.js

Lines 3095 to 3097 in 93d9d51

	// Search for the same X in the existing data set
	pointIndex = H.inArray(x, this.xData, lastIndex);

Workaround:

Use series.setData with updatePoints argument set to false.

Simple demo with the workaround: http://jsfiddle.net/BlackLabel/rbkv9d2a/1/
Original demo with the workaround: http://jsfiddle.net/BlackLabel/gvnLu3f8/6/

[TorsteinHonsi]

I think the entire code block if (isNumber(x)) { should only run if requireSorting. What do you think @KacperMadej?

if (requireSorting && isNumber(x)) {

[TorsteinHonsi]

Besides, we should be able to make soft updates (with animation) by using point.id instead of linking the points by x.

[KacperMadej]

@TorsteinHonsi
I wanted to write suggested changes, but it started to look like a very long text. Instead, I prepared a commit and I'll create a PR in few minutes, so you could comment directly on code.

[garybrain]

Hi, the workaround got me past the problem so many thanks for the quick reply.

G.