Adding images into a label of a bar chart

[Sixs]

How can I add an image into the label of a bar chart? I'm reading the data from a spreadsheet and in one column I have the image's urls.

[Sixs]

I found this: https://developers.google.com/chart/interactive/docs/customizing_tooltip_content
But in my case I'm getting the data from a spreadsheet. how can I set the 'role': 'tooltip' to my column that have the urls of the images?

[Sixs]

Ok I got it, but only in with BarChart (I think that if work in barchart can work in the same way with Histogram):

My query is:

    var query = new google.visualization.Query(tqUrl);
    query.setQuery('Select B, G, C');

Where in column C I have the url image, the column C have the index 2 (start in 0) so I use:

    var data = response.getDataTable();
    data.setColumnProperties( 2, {
     role: 'tooltip',
     html: true
    }); 

and then in chart properties:

        'focusTarget': 'category',
        'tooltip': {'isHtml': 'true'},

But when I replace BarChart with Histogram I get the message:

Focus target [object Object] is not supported for the chosen chart type   

How can I use it with Histogram this option?

[Daniel LaLiberte]

Hi Sixs,

Looks like you have found a bug.  At least it shouldn't report such an obtuse error, though I believe the focusTarget of 'category' should be supported with custom html tooltips.  

The only workaround I can suggest at this time is that you could implement your own histogram using ColumnChart (or BarChart).  

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Daniel LaLiberte

dlaliberte@Google.com   5CC, Cambridge MA