1 |
c2c2ce48
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Štěpán Červenka
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{
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"$schema": "https://vega.github.io/schema/vega/v5.json",
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"width": 720,
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"height": 200,
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"padding": 5,
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"data": [
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{
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"name": "table",
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"values": null,
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"transform": [
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{
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"type": "formula",
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"expr": "toDate(datum[\"time\"])",
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"as": "dateTime"
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}]
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},
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{
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"name": "table2",
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"source": "table",
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"transform": [
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{
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"type": "aggregate",
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"fields": ["dateTime", "dateTime"],
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"ops": ["min", "max"],
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"as": ["dateMinTemp", "dateMaxTemp"]
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},
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{
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"type": "formula",
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"expr":"time(datum[\"dateMinTemp\"] - timeStep)",
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"as": "dateMin"
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},
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{
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"type": "formula",
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"expr":"time(datum[\"dateMaxTemp\"] + timeStep)",
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"as": "dateMax"
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},
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{
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"type": "formula",
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"expr":"time(datum[\"dateMax\"]) - time(datum[\"dateMin\"])",
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"as": "range"
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}
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]
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}
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],
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"signals": [
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{
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"name": "timeStep",
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"value": 1800000
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},
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{
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"name": "arrowCount",
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"value": 25
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},
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{
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"name": "selectionWidth",
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"update": "floor((arrowCount * timeStep * width) / data('table2')[0].range)"
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},
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{
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"name": "detailDomain",
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"update": "[time(data('table2')[0].dateMin), time(data('table2')[0].dateMin) + (timeStep * arrowCount)] "
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}
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],
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"marks": [
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{
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"type": "group",
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"name": "detail",
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"encode": {
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"enter": {
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"height": {"value": 60},
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"width": {"value": 720}
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}
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},
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"scales": [
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{
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"name": "xDetail",
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"type": "time",
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"range": "width",
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"domain": {"signal": "detailDomain"}
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}
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],
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"axes": [
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{"orient": "bottom", "scale": "xDetail"}
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],
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"marks": [
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{
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"type": "group",
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"encode": {
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"enter": {
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"height": {"field": {"group": "height"}},
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"width": {"field": {"group": "width"}},
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"clip": {"value": true}
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}
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},
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"marks": [
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{
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"type": "symbol",
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"from": {"data": "table"},
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"encode": {
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"enter": {
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"tooltip": {
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"signal": "{title: timeFormat(datum.dateTime, '%B %d, %Y %H:%M') , 'gid': datum.gid , 'val': datum.value }"
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}
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},
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"hover": { "fill": {"value": "red"} },
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"update": {
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"shape": {"value": "arrow"},
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"size": {"value": 500},
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"x": {"scale": "xDetail", "field": "dateTime"},
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"y": {"value":30},
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"angle":{"field": "value"},
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"color": {"value": "both"},
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"strokeWidth": {"value": 1},
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"fill": {"value": "steelblue"}
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}
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}
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}
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]
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}
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]
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},
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{
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"type": "group",
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"name": "overview",
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"encode": {
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"enter": {
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"x": {"value": 0},
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"y": {"value": 100},
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"height": {"value": 70},
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"width": {"value": 720},
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"fill": {"value": "transparent"}
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}
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},
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"signals": [
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{
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"name": "brush",
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"update": "[0,selectionWidth]",
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"on": [
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{
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"events": {"signal": "delta"},
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"update": "clampRange([anchor[0] + delta, anchor[1] + delta], 0, width)"
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}
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]
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},
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{
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"name": "anchor", "value": null,
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"on": [{"events": "@brush:mousedown", "update": "slice(brush)"}]
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},
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{
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"name": "xdown", "value": 0,
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"on": [{"events": "@brush:mousedown", "update": "x()"}]
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},
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{
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"name": "delta", "value": 0,
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"on": [
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{
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"events": "[@brush:mousedown, window:mouseup] > window:mousemove!",
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"update": "x() - xdown"
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}
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]
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},
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{
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"name": "detailDomain",
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"push": "outer",
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"on": [
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{
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"events": {"signal": "brush"},
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"update": "invert('xOverview', brush)"
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}
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]
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}],
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"scales": [
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{
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"name": "xOverview",
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"type": "time",
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"range": "width",
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"domain": {"data": "table2", "fields": ["dateMin", "dateMax"]}
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},
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{
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"name": "yOverview",
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"type": "linear",
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"range": [70, 0],
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"nice": true, "zero": true
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}
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],
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"axes": [
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{"orient": "bottom", "scale": "xOverview"}
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],
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"marks": [
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{
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"type": "rect",
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"name": "brush",
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"encode": {
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"enter": {
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"y": {"value": 0},
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"height": {"value": 70},
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"fill": {"value": "#333"},
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"fillOpacity": {"value": 0.2}
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},
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"update": {
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"x": {"signal": "brush[0]"},
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"x2": {"signal": "brush[1]"}
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}
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}
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},
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{
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"type": "rect",
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"interactive": false,
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"encode": {
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"enter": {
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"y": {"value": 0},
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"height": {"value": 70},
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"width": {"value": 1},
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"fill": {"value": "firebrick"}
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},
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"update": {
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"x": {"signal": "brush[0]"}
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}
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}
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},
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{
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"type": "rect",
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"interactive": false,
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"encode": {
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"enter": {
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"y": {"value": 0},
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"height": {"value": 70},
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"width": {"value": 1},
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"fill": {"value": "firebrick"}
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},
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"update": {
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"x": {"signal": "brush[1]"}
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}
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}
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}
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]
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}
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]
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}
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