Value not getting updated on click of Column Chart field Links

Question

I want to save some value on click of various points in a column chart. I have added dynamicLink() component in the chart series, but the value is not getting saved. I'm pasting the code snippet below. Anyone knowing the way out, please help. 
 load( local!a, local!b, local!c, { a!columnChartField( label: "Multi-Category Chart", categories: { "Cat-1", "Cat-2", "Cat-3" }, stacking: "NORMAL", series: { a!chartSeries( label: "Bar-1", data: { 10, 20, 30 }, links: { a!dynamicLink(saveInto: save(local!a,"10")), a!dynamicLink(saveInto: save(local!b,"20")), a!dynamicLink(saveInto: save(local!c,"30")) } ), a!chartSeries( label: "Bar-2", data: { 20, 10, 30 } ), a!chartSeries( label: "Bar-2", data: { 40, 10, 15 } ) } ), a!textField(value: local!a) })

Mike Schmitt · Answer

Note that with this code, the "a!forEach" call you've added doesn't do very much, because it's saving the same hardcoded values into the three local variables (a - c) regardless of which item in the chart is clicked. 
 If you wish to populate these with the actual column data when clicked, you'd replace the hardcoded values with fv!item.data[index], as below: 
 load(
 local!a,
 local!b,
 local!c,
 local!data: {
 {
 data: {
 10,
 20,
 30
 }
 },
 {
 data: {
 20,
 10,
 30
 }
 },
 {
 data: {
 40,
 10,
 15
 }
 }
 },
 local!label: {
 "Bar-1",
 "Bar-2",
 "Bar-3"
 },
 {
 a!columnChartField(
 label: "Multi-Category Chart",
 categories: {
 "Cat-1",
 "Cat-2",
 "Cat-3"
 },
 stacking: "NORMAL",
 series: {
 a!forEach(
 items: local!data,
 expression: a!chartSeries(
 label: local!label[fv!index],
 data: fv!item.data,
 links: a!forEach(
 items: local!data,
 expression: a!dynamicLink(
 saveInto: {
 a!save(
 local!a,
 fv!item.data[1]
 ),
 a!save(
 local!b,
 fv!item.data[2]
 ),
 a!save(
 local!c,
 fv!item.data[3]
 )
 }
 )
 )
 )
 )
 }
 ),
 a!textField(
 value: "a: " & local!a & char(10) &
 "b: " & local!b & char(10) &
 "c: " & local!c,
 readOnly: true()
 )
 }
)

Value not getting updated on click of Column Chart field Links

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