No-data-to-display label shows when word cloud chart has data plotted and visible.

[peter-stoyanov]

Expected behaviour

When data is present and visible in the plot area of a Wordcloud type chart there should be no "No data to display" label rendered.

Actual behaviour

"No data to display" label is overlapping with the actual data.

Live demo with steps to reproduce

The issue is visible in the following js fiddle:

http://jsfiddle.net/peshoStoyanov/xq1sz6q7/4/

Affected browser(s)

Tested only on Google Chrome
Version 61.0.3163.100 (Official Build) (64-bit)

Debugging

I am new to highcharts but when I debugged the source code I think the issue is in these lines:

/**
* Define hasData functions for series. These return true if there are data
* points on this series within the plot area.
*/
H.Series.prototype.hasData = function() {
    return this.visible && this.dataMax !== undefined && this.dataMin !== undefined; // #3703
};

For my wordcloud chart hasData() returns false, due to this.dataMax and this.dataMin being undefined.

[pawelfus]

Hi @peter-stoyanov

Thanks for reporting this bug!

Workaround:
Overwrite hasData method:

Highcharts.seriesTypes.wordcloud.prototype.hasData = function () {
	return this.visible && this.points.length > 0;
};

Demo: http://jsfiddle.net/xq1sz6q7/6/

@jon-a-nygaard