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feat: Add comparators/operators for selection params #9831

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052d854
feat: allow field predicate comparisons against params
joelostblom Apr 14, 2026
77b2fde
fix: resolve selection parameter field comparisons from stores
joelostblom Apr 14, 2026
f9b57fa
fix: keep point selections usable with line+point marks
joelostblom Apr 14, 2026
f4369d1
feat: add empty semantics to param comparator refs
joelostblom Apr 14, 2026
2fb1891
fix: default selection comparator empty semantics to true
joelostblom Apr 14, 2026
d37589f
chore(schema): include param comparator value refs
joelostblom Apr 14, 2026
3836faa
fix: resolve comparator selection refs across composed views
joelostblom Apr 14, 2026
f5e76cb
docs: add parameter comparator predicate guidance and example
joelostblom Apr 14, 2026
c0b0abb
test: align selection expectations with path-click guards
joelostblom Apr 14, 2026
73fa363
chore: update TOC [CI]
Apr 14, 2026
e3aea81
fix: avoid top-level timer signal dependency on unit scope
joelostblom Apr 14, 2026
59edccc
chore: update examples [CI]
Apr 14, 2026
e1e5d59
test: add coverage for comparator selection predicate branches
joelostblom Apr 14, 2026
81272df
fix: keep cross-view comparator example schema-valid
joelostblom Apr 14, 2026
901068b
chore: update examples [CI]
Apr 14, 2026
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36 changes: 36 additions & 0 deletions build/vega-lite-schema.json
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Original file line number Diff line number Diff line change
Expand Up @@ -9603,6 +9603,9 @@
},
{
"$ref": "#/definitions/ExprRef"
},
{
"$ref": "#/definitions/ParameterValueRef"
}
],
"description": "The value that the field should be equal to."
Expand Down Expand Up @@ -9652,6 +9655,9 @@
},
{
"$ref": "#/definitions/ExprRef"
},
{
"$ref": "#/definitions/ParameterValueRef"
}
],
"description": "The value that the field should be greater than or equals to."
Expand Down Expand Up @@ -9697,6 +9703,9 @@
},
{
"$ref": "#/definitions/ExprRef"
},
{
"$ref": "#/definitions/ParameterValueRef"
}
],
"description": "The value that the field should be greater than."
Expand Down Expand Up @@ -9742,6 +9751,9 @@
},
{
"$ref": "#/definitions/ExprRef"
},
{
"$ref": "#/definitions/ParameterValueRef"
}
],
"description": "The value that the field should be less than or equals to."
Expand Down Expand Up @@ -9787,6 +9799,9 @@
},
{
"$ref": "#/definitions/ExprRef"
},
{
"$ref": "#/definitions/ParameterValueRef"
}
],
"description": "The value that the field should be less than."
Expand Down Expand Up @@ -19235,6 +19250,27 @@
],
"type": "object"
},
"ParameterValueRef": {
"additionalProperties": false,
"properties": {
"empty": {
"description": "How empty selection values should be treated when `param` references a selection parameter. If true, an empty selection evaluates to true. If false, an empty selection evaluates to false.",
"type": "boolean"
},
"field": {
"$ref": "#/definitions/FieldName",
"description": "Optional field key to read from an object-valued parameter."
},
"param": {
"$ref": "#/definitions/ParameterName",
"description": "Parameter to use as a value in a field predicate comparison."
}
},
"required": [
"param"
],
"type": "object"
},
"Parse": {
"additionalProperties": {
"$ref": "#/definitions/ParseValue"
Expand Down
2 changes: 1 addition & 1 deletion examples/compiled/airport_connections.vg.json
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Expand Up @@ -139,7 +139,7 @@
"markname": "layer_2_voronoi"
}
],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"layer_2\", fields: org_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"origin\"]]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"layer_2\", fields: org_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"origin\"]]} : null",
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@joelostblom joelostblom Apr 14, 2026

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It's not that pretty that this change shows up in so many examples, but I didn't find another way to ensure that points received clicks/interactions instead of lines when plotted together.

"force": true
},
{"events": [{"source": "view", "type": "dblclick"}], "update": "null"}
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2 changes: 1 addition & 1 deletion examples/compiled/concat_bar_layer_circle.vg.json
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Expand Up @@ -257,7 +257,7 @@
"on": [
{
"events": [{"source": "scope", "type": "click"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"concat_1\", fields: pts_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"Major Genre\"]]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"concat_1\", fields: pts_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"Major Genre\"]]} : null",
"force": true
},
{
Expand Down
4 changes: 2 additions & 2 deletions examples/compiled/concat_hover.vg.json
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Expand Up @@ -68,7 +68,7 @@
"on": [
{
"events": [{"source": "scope", "type": "pointerover"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"concat_0\", _vgsid_: (item().isVoronoi ? datum.datum : datum)[\"_vgsid_\"]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"concat_0\", _vgsid_: (item().isVoronoi ? datum.datum : datum)[\"_vgsid_\"]} : null",
"force": true
},
{
Expand Down Expand Up @@ -196,7 +196,7 @@
"on": [
{
"events": [{"source": "scope", "type": "pointerover"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"concat_1\", _vgsid_: (item().isVoronoi ? datum.datum : datum)[\"_vgsid_\"]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"concat_1\", _vgsid_: (item().isVoronoi ? datum.datum : datum)[\"_vgsid_\"]} : null",
"force": true
},
{
Expand Down
2 changes: 1 addition & 1 deletion examples/compiled/concat_hover_filter.svg
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14 changes: 8 additions & 6 deletions examples/compiled/concat_hover_filter.vg.json
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Expand Up @@ -98,7 +98,7 @@
"on": [
{
"events": [{"source": "scope", "type": "pointerover"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"concat_0_layer_0\", _vgsid_: (item().isVoronoi ? datum.datum : datum)[\"_vgsid_\"]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"concat_0_layer_0\", _vgsid_: (item().isVoronoi ? datum.datum : datum)[\"_vgsid_\"]} : null",
"force": true
},
{
Expand Down Expand Up @@ -156,7 +156,7 @@
"name": "concat_0_layer_1_marks",
"type": "symbol",
"style": ["point"],
"interactive": false,
"interactive": true,
"from": {"data": "data_2"},
"encode": {
"update": {
Expand All @@ -168,7 +168,8 @@
"signal": "\"Horsepower: \" + (format(datum[\"Horsepower\"], \"\")) + \"; Miles_per_Gallon: \" + (format(datum[\"Miles_per_Gallon\"], \"\"))"
},
"x": {"scale": "concat_0_x", "field": "Horsepower"},
"y": {"scale": "concat_0_y", "field": "Miles_per_Gallon"}
"y": {"scale": "concat_0_y", "field": "Miles_per_Gallon"},
"cursor": {"value": "pointer"}
}
}
}
Expand Down Expand Up @@ -239,7 +240,7 @@
"on": [
{
"events": [{"source": "scope", "type": "pointerover"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"concat_1_layer_0\", _vgsid_: (item().isVoronoi ? datum.datum : datum)[\"_vgsid_\"]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"concat_1_layer_0\", _vgsid_: (item().isVoronoi ? datum.datum : datum)[\"_vgsid_\"]} : null",
"force": true
},
{
Expand Down Expand Up @@ -297,7 +298,7 @@
"name": "concat_1_layer_1_marks",
"type": "symbol",
"style": ["point"],
"interactive": false,
"interactive": true,
"from": {"data": "data_3"},
"encode": {
"update": {
Expand All @@ -309,7 +310,8 @@
"signal": "\"Horsepower: \" + (format(datum[\"Horsepower\"], \"\")) + \"; Acceleration: \" + (format(datum[\"Acceleration\"], \"\"))"
},
"x": {"scale": "concat_1_x", "field": "Horsepower"},
"y": {"scale": "concat_1_y", "field": "Acceleration"}
"y": {"scale": "concat_1_y", "field": "Acceleration"},
"cursor": {"value": "pointer"}
}
}
}
Expand Down
2 changes: 1 addition & 1 deletion examples/compiled/dynamic_color_legend.vg.json
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Expand Up @@ -451,7 +451,7 @@
"on": [
{
"events": [{"source": "scope", "type": "click"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"concat_1\", fields: click_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"weather\"]]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"concat_1\", fields: click_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"weather\"]]} : null",
"force": true
},
{
Expand Down
4 changes: 2 additions & 2 deletions examples/compiled/interactive_bar_select_highlight.vg.json
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Expand Up @@ -74,7 +74,7 @@
"on": [
{
"events": [{"source": "scope", "type": "pointerover"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"\", _vgsid_: (item().isVoronoi ? datum.datum : datum)[\"_vgsid_\"]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"\", _vgsid_: (item().isVoronoi ? datum.datum : datum)[\"_vgsid_\"]} : null",
"force": true
},
{"events": [{"source": "view", "type": "dblclick"}], "update": "null"}
Expand Down Expand Up @@ -105,7 +105,7 @@
"on": [
{
"events": [{"source": "scope", "type": "click"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"\", _vgsid_: (item().isVoronoi ? datum.datum : datum)[\"_vgsid_\"]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"\", _vgsid_: (item().isVoronoi ? datum.datum : datum)[\"_vgsid_\"]} : null",
"force": true
},
{"events": [{"source": "view", "type": "dblclick"}], "update": "null"}
Expand Down
2 changes: 1 addition & 1 deletion examples/compiled/interactive_concat_layer.vg.json
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Expand Up @@ -267,7 +267,7 @@
"on": [
{
"events": [{"source": "scope", "type": "click"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"concat_1\", fields: pts_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"Major Genre\"]]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"concat_1\", fields: pts_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"Major Genre\"]]} : null",
"force": true
},
{
Expand Down
4 changes: 2 additions & 2 deletions examples/compiled/interactive_global_development.vg.json
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Expand Up @@ -156,7 +156,7 @@
"on": [
{
"events": [{"source": "scope", "type": "pointerover"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"layer_1_layer_1\", fields: hovered_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"country\"]]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"layer_1_layer_1\", fields: hovered_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"country\"]]} : null",
"force": true
},
{"events": [{"source": "view", "type": "dblclick"}], "update": "null"}
Expand All @@ -180,7 +180,7 @@
"on": [
{
"events": [{"source": "scope", "type": "click"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"layer_1_layer_1\", fields: clicked_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"country\"]]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"layer_1_layer_1\", fields: clicked_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"country\"]]} : null",
"force": true
},
{"events": [{"source": "view", "type": "dblclick"}], "update": "null"}
Expand Down
2 changes: 1 addition & 1 deletion examples/compiled/interactive_histogram_full_height_hover.vg.json
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Expand Up @@ -83,7 +83,7 @@
"on": [
{
"events": [{"source": "scope", "type": "pointerover"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"layer_0\", _vgsid_: (item().isVoronoi ? datum.datum : datum)[\"_vgsid_\"]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"layer_0\", _vgsid_: (item().isVoronoi ? datum.datum : datum)[\"_vgsid_\"]} : null",
"force": true
},
{"events": [{"source": "view", "type": "pointerout"}], "update": "null"}
Expand Down
2 changes: 1 addition & 1 deletion examples/compiled/interactive_index_chart.vg.json
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Expand Up @@ -119,7 +119,7 @@
"markname": "layer_0_voronoi"
}
],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"layer_0\", fields: index_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"date\"]]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"layer_0\", fields: index_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"date\"]]} : null",
"force": true
},
{"events": [{"source": "view", "type": "dblclick"}], "update": "null"}
Expand Down
6 changes: 3 additions & 3 deletions examples/compiled/interactive_layered_crossfilter_discrete.vg.json
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Expand Up @@ -213,7 +213,7 @@
"on": [
{
"events": [{"source": "scope", "type": "click"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"child__column_distance_layer_0\", fields: brush_tuple_fields, values: [[(item().isVoronoi ? datum.datum : datum)[\"bin_maxbins_20_distance\"], (item().isVoronoi ? datum.datum : datum)[\"bin_maxbins_20_distance_end\"]]]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"child__column_distance_layer_0\", fields: brush_tuple_fields, values: [[(item().isVoronoi ? datum.datum : datum)[\"bin_maxbins_20_distance\"], (item().isVoronoi ? datum.datum : datum)[\"bin_maxbins_20_distance_end\"]]]} : null",
"force": true
},
{
Expand Down Expand Up @@ -369,7 +369,7 @@
"on": [
{
"events": [{"source": "scope", "type": "click"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"child__column_delay_layer_0\", fields: brush_tuple_fields, values: [[(item().isVoronoi ? datum.datum : datum)[\"bin_maxbins_20_delay\"], (item().isVoronoi ? datum.datum : datum)[\"bin_maxbins_20_delay_end\"]]]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"child__column_delay_layer_0\", fields: brush_tuple_fields, values: [[(item().isVoronoi ? datum.datum : datum)[\"bin_maxbins_20_delay\"], (item().isVoronoi ? datum.datum : datum)[\"bin_maxbins_20_delay_end\"]]]} : null",
"force": true
},
{
Expand Down Expand Up @@ -525,7 +525,7 @@
"on": [
{
"events": [{"source": "scope", "type": "click"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"child__column_time_layer_0\", fields: brush_tuple_fields, values: [[(item().isVoronoi ? datum.datum : datum)[\"bin_maxbins_20_time\"], (item().isVoronoi ? datum.datum : datum)[\"bin_maxbins_20_time_end\"]]]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"child__column_time_layer_0\", fields: brush_tuple_fields, values: [[(item().isVoronoi ? datum.datum : datum)[\"bin_maxbins_20_time\"], (item().isVoronoi ? datum.datum : datum)[\"bin_maxbins_20_time_end\"]]]} : null",
"force": true
},
{
Expand Down
2 changes: 1 addition & 1 deletion examples/compiled/interactive_line_hover.vg.json
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Expand Up @@ -58,7 +58,7 @@
"on": [
{
"events": [{"source": "scope", "type": "pointerover"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"layer_0\", fields: hover_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"symbol\"]]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"layer_0\", fields: hover_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"symbol\"]]} : null",
"force": true
},
{"events": [{"source": "view", "type": "dblclick"}], "update": "null"}
Expand Down
2 changes: 1 addition & 1 deletion examples/compiled/interactive_line_point_hover.vg.json
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Expand Up @@ -45,7 +45,7 @@
"on": [
{
"events": [{"source": "scope", "type": "pointerover"}],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"layer_1\", _vgsid_: (item().isVoronoi ? datum.datum : datum)[\"_vgsid_\"]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"layer_1\", _vgsid_: (item().isVoronoi ? datum.datum : datum)[\"_vgsid_\"]} : null",
"force": true
},
{"events": [{"source": "view", "type": "pointerout"}], "update": "null"}
Expand Down
2 changes: 1 addition & 1 deletion examples/compiled/interactive_multi_line_label.vg.json
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Expand Up @@ -83,7 +83,7 @@
"markname": "layer_0_layer_1_voronoi"
}
],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"layer_0_layer_1\", fields: label_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"date\"]]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"layer_0_layer_1\", fields: label_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"date\"]]} : null",
"force": true
},
{"events": [{"source": "view", "type": "dblclick"}], "update": "null"}
Expand Down
2 changes: 1 addition & 1 deletion examples/compiled/interactive_multi_line_pivot_tooltip.svg
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7 changes: 4 additions & 3 deletions examples/compiled/interactive_multi_line_pivot_tooltip.vg.json
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Expand Up @@ -67,7 +67,7 @@
"markname": "layer_1_voronoi"
}
],
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 ? {unit: \"layer_1\", fields: hover_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"date\"]]} : null",
"update": "datum && item().mark.marktype !== 'group' && indexof(item().mark.role, 'legend') < 0 && indexof(['line', 'trail', 'area'], item().mark.marktype) < 0 ? {unit: \"layer_1\", fields: hover_tuple_fields, values: [(item().isVoronoi ? datum.datum : datum)[\"date\"]]} : null",
"force": true
},
{"events": [{"source": "view", "type": "pointerout"}], "update": "null"}
Expand Down Expand Up @@ -149,7 +149,7 @@
"name": "layer_0_layer_1_marks",
"type": "symbol",
"style": ["point"],
"interactive": false,
"interactive": true,
"from": {"data": "data_0"},
"encode": {
"update": {
Expand All @@ -161,7 +161,8 @@
"signal": "\"date: \" + (timeFormat(datum[\"date\"], \"%b %d, %Y\")) + \"; price: \" + (format(datum[\"price\"], \"\")) + \"; symbol: \" + (isValid(datum[\"symbol\"]) ? isArray(datum[\"symbol\"]) ? join(datum[\"symbol\"], ' ') : datum[\"symbol\"] : \"\"+datum[\"symbol\"])"
},
"x": {"scale": "x", "field": "date"},
"y": {"scale": "y", "field": "price"}
"y": {"scale": "y", "field": "price"},
"cursor": {"value": "pointer"}
}
}
},
Expand Down
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