{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "background": "white",
  "padding": 5,
  "data": [
    {"name": "brush_store"},
    {"name": "source_0", "url": "data/cars.json", "format": {"type": "json"}},
    {
      "name": "data_0",
      "source": "source_0",
      "transform": [
        {
          "type": "filter",
          "expr": "!length(data(\"brush_store\")) || vlSelectionTest(\"brush_store\", datum)"
        }
      ]
    },
    {
      "name": "data_1",
      "source": "data_0",
      "transform": [
        {
          "type": "aggregate",
          "groupby": ["Name"],
          "ops": ["count"],
          "fields": [null],
          "as": ["__count"]
        }
      ]
    },
    {
      "name": "data_2",
      "source": "source_0",
      "transform": [
        {
          "type": "aggregate",
          "groupby": ["Name"],
          "ops": ["count"],
          "fields": [null],
          "as": ["__count"]
        }
      ]
    }
  ],
  "signals": [
    {"name": "concat_0_width", "value": 200},
    {"name": "concat_0_y_step", "value": 20},
    {
      "name": "concat_0_height",
      "update": "bandspace(domain('concat_0_y').length, 0.1, 0.05) * concat_0_y_step"
    },
    {"name": "concat_1_width", "value": 50},
    {"name": "concat_1_height", "value": 200},
    {
      "name": "unit",
      "value": {},
      "on": [
        {"events": "mousemove", "update": "isTuple(group()) ? group() : unit"}
      ]
    },
    {
      "name": "brush",
      "update": "vlSelectionResolve(\"brush_store\", \"union\")"
    }
  ],
  "layout": {"padding": 20, "bounds": "full", "align": "each"},
  "marks": [
    {
      "type": "group",
      "name": "concat_0_group",
      "style": "cell",
      "encode": {
        "update": {
          "width": {"signal": "concat_0_width"},
          "height": {"signal": "concat_0_height"}
        }
      },
      "marks": [
        {
          "name": "concat_0_marks",
          "type": "rect",
          "style": ["bar"],
          "interactive": false,
          "from": {"data": "data_1"},
          "encode": {
            "update": {
              "fill": {"value": "#4c78a8"},
              "ariaRoleDescription": {"value": "bar"},
              "description": {
                "signal": "\"Count of Records: \" + (format(datum[\"__count\"], \"\")) + \"; Name: \" + (isValid(datum[\"Name\"]) ? datum[\"Name\"] : \"\"+datum[\"Name\"])"
              },
              "x": {"scale": "concat_0_x", "field": "__count"},
              "x2": {"scale": "concat_0_x", "value": 0},
              "y": {"scale": "concat_0_y", "field": "Name"},
              "height": {"scale": "concat_0_y", "band": 1}
            }
          }
        }
      ],
      "axes": [
        {
          "scale": "concat_0_x",
          "orient": "top",
          "gridScale": "concat_0_y",
          "grid": true,
          "tickCount": {"signal": "ceil(concat_0_width/40)"},
          "domain": false,
          "labels": false,
          "aria": false,
          "maxExtent": 0,
          "minExtent": 0,
          "ticks": false,
          "zindex": 0
        },
        {
          "scale": "concat_0_x",
          "orient": "top",
          "grid": false,
          "title": "Count of Records",
          "labelFlush": true,
          "labelOverlap": true,
          "tickCount": {"signal": "ceil(concat_0_width/40)"},
          "zindex": 0
        },
        {
          "scale": "concat_0_y",
          "orient": "left",
          "grid": false,
          "minExtent": 200,
          "zindex": 0
        }
      ]
    },
    {
      "type": "group",
      "name": "concat_1_group",
      "style": "cell",
      "encode": {
        "update": {
          "width": {"signal": "concat_1_width"},
          "height": {"signal": "concat_1_height"}
        }
      },
      "signals": [
        {
          "name": "brush_y",
          "value": [],
          "on": [
            {
              "events": {
                "source": "scope",
                "type": "mousedown",
                "filter": [
                  "!event.item || event.item.mark.name !== \"brush_brush\""
                ]
              },
              "update": "[y(unit), y(unit)]"
            },
            {
              "events": {
                "source": "window",
                "type": "mousemove",
                "consume": true,
                "between": [
                  {
                    "source": "scope",
                    "type": "mousedown",
                    "filter": [
                      "!event.item || event.item.mark.name !== \"brush_brush\""
                    ]
                  },
                  {"source": "window", "type": "mouseup"}
                ]
              },
              "update": "[brush_y[0], clamp(y(unit), 0, concat_1_height)]"
            },
            {"events": {"signal": "brush_scale_trigger"}, "update": "[0, 0]"},
            {
              "events": [{"source": "view", "type": "dblclick"}],
              "update": "[0, 0]"
            },
            {
              "events": {"signal": "brush_translate_delta"},
              "update": "clampRange(panLinear(brush_translate_anchor.extent_y, brush_translate_delta.y / span(brush_translate_anchor.extent_y)), 0, concat_1_height)"
            },
            {
              "events": {"signal": "brush_zoom_delta"},
              "update": "clampRange(zoomLinear(brush_y, brush_zoom_anchor.y, brush_zoom_delta), 0, concat_1_height)"
            }
          ]
        },
        {
          "name": "brush_Name",
          "on": [
            {
              "events": {"signal": "brush_y"},
              "update": "brush_y[0] === brush_y[1] ? null : invert(\"concat_1_y\", brush_y)"
            }
          ]
        },
        {
          "name": "brush_scale_trigger",
          "value": {},
          "on": [
            {
              "events": [{"scale": "concat_1_y"}],
              "update": "(!isArray(brush_Name) || (invert(\"concat_1_y\", brush_y)[0] === brush_Name[0] && invert(\"concat_1_y\", brush_y)[1] === brush_Name[1])) ? brush_scale_trigger : {}"
            }
          ]
        },
        {
          "name": "brush_tuple",
          "on": [
            {
              "events": [{"signal": "brush_Name"}],
              "update": "brush_Name ? {unit: \"concat_1\", fields: brush_tuple_fields, values: [brush_Name]} : null"
            }
          ]
        },
        {
          "name": "brush_tuple_fields",
          "value": [{"field": "Name", "channel": "y", "type": "E"}]
        },
        {
          "name": "brush_translate_anchor",
          "value": {},
          "on": [
            {
              "events": [
                {
                  "source": "scope",
                  "type": "mousedown",
                  "markname": "brush_brush"
                }
              ],
              "update": "{x: x(unit), y: y(unit), extent_y: slice(brush_y)}"
            }
          ]
        },
        {
          "name": "brush_translate_delta",
          "value": {},
          "on": [
            {
              "events": [
                {
                  "source": "window",
                  "type": "mousemove",
                  "consume": true,
                  "between": [
                    {
                      "source": "scope",
                      "type": "mousedown",
                      "markname": "brush_brush"
                    },
                    {"source": "window", "type": "mouseup"}
                  ]
                }
              ],
              "update": "{x: brush_translate_anchor.x - x(unit), y: brush_translate_anchor.y - y(unit)}"
            }
          ]
        },
        {
          "name": "brush_zoom_anchor",
          "on": [
            {
              "events": [
                {
                  "source": "scope",
                  "type": "wheel",
                  "consume": true,
                  "markname": "brush_brush"
                }
              ],
              "update": "{x: x(unit), y: y(unit)}"
            }
          ]
        },
        {
          "name": "brush_zoom_delta",
          "on": [
            {
              "events": [
                {
                  "source": "scope",
                  "type": "wheel",
                  "consume": true,
                  "markname": "brush_brush"
                }
              ],
              "force": true,
              "update": "pow(1.001, event.deltaY * pow(16, event.deltaMode))"
            }
          ]
        },
        {
          "name": "brush_modify",
          "on": [
            {
              "events": {"signal": "brush_tuple"},
              "update": "modify(\"brush_store\", brush_tuple, true)"
            }
          ]
        }
      ],
      "marks": [
        {
          "name": "brush_brush_bg",
          "type": "rect",
          "clip": true,
          "encode": {
            "enter": {
              "fill": {"value": "#333"},
              "fillOpacity": {"value": 0.125}
            },
            "update": {
              "x": [
                {
                  "test": "data(\"brush_store\").length && data(\"brush_store\")[0].unit === \"concat_1\"",
                  "value": 0
                },
                {"value": 0}
              ],
              "y": [
                {
                  "test": "data(\"brush_store\").length && data(\"brush_store\")[0].unit === \"concat_1\"",
                  "signal": "brush_y[0]"
                },
                {"value": 0}
              ],
              "x2": [
                {
                  "test": "data(\"brush_store\").length && data(\"brush_store\")[0].unit === \"concat_1\"",
                  "field": {"group": "width"}
                },
                {"value": 0}
              ],
              "y2": [
                {
                  "test": "data(\"brush_store\").length && data(\"brush_store\")[0].unit === \"concat_1\"",
                  "signal": "brush_y[1]"
                },
                {"value": 0}
              ]
            }
          }
        },
        {
          "name": "concat_1_marks",
          "type": "rect",
          "style": ["bar"],
          "interactive": true,
          "from": {"data": "data_2"},
          "encode": {
            "update": {
              "fill": {"value": "#4c78a8"},
              "ariaRoleDescription": {"value": "bar"},
              "description": {
                "signal": "\"Count of Records: \" + (format(datum[\"__count\"], \"\")) + \"; Name: \" + (isValid(datum[\"Name\"]) ? datum[\"Name\"] : \"\"+datum[\"Name\"])"
              },
              "x": {"scale": "concat_1_x", "field": "__count"},
              "x2": {"scale": "concat_1_x", "value": 0},
              "y": {"scale": "concat_1_y", "field": "Name"},
              "height": {"scale": "concat_1_y", "band": 1}
            }
          }
        },
        {
          "name": "brush_brush",
          "type": "rect",
          "clip": true,
          "encode": {
            "enter": {"fill": {"value": "transparent"}},
            "update": {
              "x": [
                {
                  "test": "data(\"brush_store\").length && data(\"brush_store\")[0].unit === \"concat_1\"",
                  "value": 0
                },
                {"value": 0}
              ],
              "y": [
                {
                  "test": "data(\"brush_store\").length && data(\"brush_store\")[0].unit === \"concat_1\"",
                  "signal": "brush_y[0]"
                },
                {"value": 0}
              ],
              "x2": [
                {
                  "test": "data(\"brush_store\").length && data(\"brush_store\")[0].unit === \"concat_1\"",
                  "field": {"group": "width"}
                },
                {"value": 0}
              ],
              "y2": [
                {
                  "test": "data(\"brush_store\").length && data(\"brush_store\")[0].unit === \"concat_1\"",
                  "signal": "brush_y[1]"
                },
                {"value": 0}
              ],
              "stroke": [
                {"test": "brush_y[0] !== brush_y[1]", "value": "white"},
                {"value": null}
              ]
            }
          }
        }
      ]
    }
  ],
  "scales": [
    {
      "name": "concat_0_x",
      "type": "linear",
      "domain": [0, 6],
      "range": [0, {"signal": "concat_0_width"}],
      "zero": true
    },
    {
      "name": "concat_0_y",
      "type": "band",
      "domain": {
        "data": "data_0",
        "field": "Name",
        "sort": {"op": "count", "order": "descending"}
      },
      "range": {"step": {"signal": "concat_0_y_step"}},
      "paddingInner": 0.1,
      "paddingOuter": 0.05
    },
    {
      "name": "concat_1_x",
      "type": "linear",
      "domain": {"data": "data_2", "field": "__count"},
      "range": [0, {"signal": "concat_1_width"}],
      "nice": true,
      "zero": true
    },
    {
      "name": "concat_1_y",
      "type": "band",
      "domain": {
        "data": "source_0",
        "field": "Name",
        "sort": {"op": "count", "order": "descending"}
      },
      "range": [0, {"signal": "concat_1_height"}],
      "paddingInner": 0.1,
      "paddingOuter": 0.05
    }
  ]
}