XPlot.GoogleCharts.Chart.Map为什么不产生工具提示？

Question

I'm trying to plot locations on a map with XPlot and googlecharts.chart.map.

I followed the example I found, but the resulting map had no tool tips on the specified locations.

To debug my code I simply attempted to reproduce the example, with the same result, ie no markers at the specified locations.

My implementation of the example ( https://fslab.org/XPlot/chart/google-map-chart.html ) is below:

let data =
        [
            "China", "China: 1,363,800,000"
            "India", "India: 1,242,620,000"
            "US", "US: 317,842,000"
            "Indonesia", "Indonesia: 247,424,598"
            "Brazil", "Brazil: 201,032,714"
            "Pakistan", "Pakistan: 186,134,000"
            "Nigeria", "Nigeria: 173,615,000"
            "Bangladesh", "Bangladesh: 152,518,015"
            "Russia", "Russia: 146,019,512"
            "Japan", "Japan: 127,120,000"
        ]


let options = XPlot.GoogleCharts.Configuration.Options(showTip = true)

let chart =  data 
             |> XPlot.GoogleCharts.Chart.Map
             |> XPlot.GoogleCharts.Chart.WithOptions options
             |> XPlot.GoogleCharts.Chart.WithHeight 420
             |> XPlot.GoogleCharts.Chart.WithWidth 800

chart |> XPlot.GoogleCharts.Chart.Show

The map is shown without any markers.

How should the code be modified to ensure the locations are marked?

Answer 1

The missing tooltips problem source is not in your code, but in the ambient environment.

If you use your F# console charting app code without any changes, but bind it with nuget package XPlot.GoogleCharts ver 1.4.2 instead of the latest at the moment XPlot.GoogleCharts ver 1.5.0 , it will work as expected, ie tooltips will be present even on the html static page viewed in the browser.

The regression, I believe, has nothing to do with XPlot.GoogleCharts per se and is likely caused by the change to the way of loading JS libraries introduced by Google : XPlot.GoogleCharts ver 1.4.2 uses the old loader , while the latest XPlot.GoogleCharts ver 1.5.0 uses the new one .