aswi2021codebakers-gitlab/src/vega/basic-windchart.json @ 6686ea24

{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "width": 720,
  "height": 200,
  "padding": 5,



  "data": [
    {
      "name": "table",
      "values": null,
      "transform": [
        {
          "type": "formula",
          "expr": "toDate(datum[\"time\"])",
          "as": "dateTime"
        }]

    },
    {
      "name": "table2",
      "source": "table",
      "transform": [
        {
          "type": "aggregate",
          "fields": ["dateTime", "dateTime"],
          "ops": ["min", "max"],
          "as": ["dateMinTemp", "dateMaxTemp"]
        },
        {
          "type": "formula",
          "expr":"time(datum[\"dateMinTemp\"] - timeStep)",
          "as": "dateMin"
        },
        {
          "type": "formula",
          "expr":"time(datum[\"dateMaxTemp\"] + timeStep)",
          "as": "dateMax"
        },
        {
          "type": "formula",
          "expr":"time(datum[\"dateMax\"]) - time(datum[\"dateMin\"])",
          "as": "range"
        }
      ]
    }
  ],

  "signals": [
    {
      "name": "timeStep",
      "value": 1800000
    },
    {
      "name": "arrowCount",
      "value": 25
    },
    {
      "name": "selectionWidth",
      "update": "floor((arrowCount * timeStep * width) / data('table2')[0].range)"
    },
    {
      "name": "detailDomain",
      "update": "[time(data('table2')[0].dateMin), time(data('table2')[0].dateMin) + (timeStep * arrowCount)] "
    }
  ],

  "marks": [
    {
      "type": "group",
      "name": "detail",
      "encode": {
        "enter": {
          "height": {"value": 60},
          "width": {"value": 720}
        }
      },
      "scales": [
        {
          "name": "xDetail",
          "type": "time",
          "range": "width",
          "domain": {"signal": "detailDomain"}
        }
      ],
      "axes": [
        {"orient": "bottom", "scale": "xDetail"}
      ],
      "marks": [
        {
          "type": "group",
          "encode": {
            "enter": {
              "height": {"field": {"group": "height"}},
              "width": {"field": {"group": "width"}},
              "clip": {"value": true}
            }
          },
          "marks": [
            {
              "type": "symbol",
              "from": {"data": "table"},
              "encode": {
                "enter": {
                  "tooltip": {
                    "signal": "{title: timeFormat(datum.dateTime, '%B %d, %Y %H:%M') , 'gid': datum.gid , 'val': datum.value }"
                  }
                },
                "hover": { "fill": {"value": "red"} },
                "update": {
                  "shape": {"value": "arrow"},
                  "size": {"value": 500},
                  "x": {"scale": "xDetail", "field": "dateTime"},
                  "y": {"value":30},
                  "angle":{"field": "value"},
                  "color": {"value": "both"},
                  "strokeWidth": {"value": 1},
                  "fill": {"value": "steelblue"}

                }

              }
            }
          ]
        }
      ]
    },

    {
      "type": "group",
      "name": "overview",
      "encode": {
        "enter": {
          "x": {"value": 0},
          "y": {"value": 100},
          "height": {"value": 70},
          "width": {"value": 720},
          "fill": {"value": "transparent"}
        }
      },
      "signals": [
        {
          "name": "brush",
          "update": "[0,selectionWidth]",
          "on": [
            {
              "events": {"signal": "delta"},
              "update": "clampRange([anchor[0] + delta, anchor[1] + delta], 0, width)"
            }

          ]
        },
        {
          "name": "anchor", "value": null,
          "on": [{"events": "@brush:mousedown", "update": "slice(brush)"}]
        },
        {
          "name": "xdown", "value": 0,
          "on": [{"events": "@brush:mousedown", "update": "x()"}]
        },
        {
          "name": "delta", "value": 0,
          "on": [
            {
              "events": "[@brush:mousedown, window:mouseup] > window:mousemove!",
              "update": "x() - xdown"
            }
          ]
        },
        {
          "name": "detailDomain",
          "push": "outer",
          "on": [
            {
              "events": {"signal": "brush"},
              "update": "invert('xOverview', brush)"
            }
          ]
        }],
      "scales": [
        {
          "name": "xOverview",
          "type": "time",
          "range": "width",
          "domain": {"data": "table2", "fields": ["dateMin", "dateMax"]}
        },
        {
          "name": "yOverview",
          "type": "linear",
          "range": [70, 0],
          "nice": true, "zero": true
        }
      ],
      "axes": [
        {"orient": "bottom", "scale": "xOverview"}
      ],
      "marks": [

        {
          "type": "rect",
          "name": "brush",
          "encode": {
            "enter": {
              "y": {"value": 0},
              "height": {"value": 70},
              "fill": {"value": "#333"},
              "fillOpacity": {"value": 0.2}
            },
            "update": {
              "x": {"signal": "brush[0]"},
              "x2": {"signal": "brush[1]"}
            }
          }
        },
        {
          "type": "rect",
          "interactive": false,
          "encode": {
            "enter": {
              "y": {"value": 0},
              "height": {"value": 70},
              "width": {"value": 1},
              "fill": {"value": "firebrick"}
            },
            "update": {
              "x": {"signal": "brush[0]"}
            }
          }
        },
        {
          "type": "rect",
          "interactive": false,
          "encode": {
            "enter": {
              "y": {"value": 0},
              "height": {"value": 70},
              "width": {"value": 1},
              "fill": {"value": "firebrick"}
            },
            "update": {
              "x": {"signal": "brush[1]"}
            }
          }
        }


      ]
    }






  ]
}