Vega Lite - Text color based on condition, so next white when darker background

[DW868990]

Hi,

I am trying to get the Text color of the my Text Mark to be white when the value is over a 1000.

My vega-lite code is below and is not returning the color change, any help in what i am missing is appreciated.

{
"data": {"name": "dataset"},
"layer": [
{
"mark": "rect",
"encoding": {
"x": {"field": "Category",
"type": "nominal"
},
"y": {"field": "Sales", "type": "ordinal",
"bin":{"maxbins":10}},
"color": {"aggregate": "count", "field": "CustomerID"},
"tooltip": [
{"field": "Category", "type": "ordinal"},
{"aggregate": "count","field": "Metric", "type":"quantitative"}
]
}
},
{
"mark": {
"type": "text",
"dy":60,
"dx":-50
},
"encoding": {
"x": {"field": "Category",
"type": "nominal"
},
"y": {"field": "Sales", "type": "ordinal",
"bin":{"maxbins":10}},
"text": {"aggregate": "count","field": "CustomerID", "type": "quantitative"},
"color": {
"condition": {
"test": "datum['CustomerID'] < 1000",
"value": "white"},
"value": "black"
}
}
}
],
"config": {
"axis": {"grid": true, "tickBand": "extent"}
}
}

[KerKol]

I believe you need an aggregated value in the condition 

[Greg_Deckler]

@DW868990 I believe your encoding needs to be in your "mark" settings like this example from vega-lite documentation:

      "mark": "text",
      "encoding": {
        "text": {"field": "num_cars", "type": "quantitative"},
        "color": {
          "condition": {"test": "datum['num_cars'] < 40", "value": "black"},
          "value": "white"
        }