Custom point in legend does not display if chart type is Donut

[jarrod-cummings]

Description

I'm trying to use a custom symbol, like a rounded square, in the legend for a donut chart that I'm creating. I've been trying to do this through a combination of the legend.usePoint and point.pattern settings. However, I've found that while custom symbol will show up in the legend as expected if the chart type is line, if I switch the chart type to donut it no longer displays.

Steps to check or reproduce

var chart = bb.generate({
  data: {
    columns: [
	["data1", 30, 200, 100, 400, 150, 250],
	["data2", 130, 100, 200, 100, 250, 150],
	
    ],
    type: "line",  // Switch this to donut and the symbol won't display in the legend
  },
  point: {
    pattern: [
      '<rect width="15" height="15" rx="5" ry="5" ></rect>',
    ]
  },
  legend: {
    usePoint: true,
    position: 'inset'
  },
  bindto: "#usePoint"
});

I inspected the html for the chart and I found that the symbols in the legend are set with a tag that has an href pointing to the symbol which exists somewhere else in the page. When I inspected the html with the chart type set to donut, the href is still there, but the element it is referencing does not seem to exist.
Line chart html:

Donut chart html

[netil]

Hi @jarrod-cummings, basically custom point defined via point.pattern is an option dedicated to be used for axis based charts. It doesn't work on Arc based chart for that reason.

Let me consider if this approach is generally useful or not.