Interactive Dashboard with Cross Highlight

{
  "$schema": "https://vega.github.io/schema/vega-lite/v2.json",
  "description": "A dashboard with cross-highlighting.",
  "data": {"url": "data/movies.json"},
  "vconcat": [
    {
      "layer": [{
        "mark": "rect",
        "encoding": {
          "x": {
            "bin": {"maxbins": 10},
            "field": "IMDB_Rating",
            "type": "quantitative"
          },
          "y": {
            "bin": {"maxbins": 10},
            "field": "Rotten_Tomatoes_Rating",
            "type": "quantitative"
          },
          "color": {
            "aggregate": "count",
            "type": "quantitative",
            "legend": {
              "title": "All Movies"
            }
          }
        }
      }, {
        "transform": [{
          "filter": {"selection": "pts"}
        }],
        "mark": "point",
        "encoding": {
          "x": {
            "bin": {"maxbins": 10},
            "field": "IMDB_Rating",
            "type": "quantitative"
          },
          "y": {
            "bin": {"maxbins": 10},
            "field": "Rotten_Tomatoes_Rating",
            "type": "quantitative"
          },
          "size": {
            "aggregate": "count",
            "type": "quantitative",
            "legend": {
              "title": "In Selected Category"
            }
          },
          "color": {
            "value": "#666"
          }
        }
      }]
    }, {
      "width": 330,
      "height": 120,
      "mark": "bar",
      "selection": {
        "pts": {"type": "single", "encodings": ["x"]}
      },
      "encoding": {
        "x": {"field": "Major_Genre", "type": "nominal", "axis": {"labelAngle": -40}},
        "y": {"aggregate": "count", "type": "quantitative"},
        "color": {
          "condition": {
            "selection": "pts",
            "value": "steelblue"
          },
          "value": "grey"
        }
      }
    }
  ],
  "resolve": {
    "legend": {
      "color": "independent",
      "size": "independent"
    }
  },
  "config": {
    "range": {
      "heatmap": {
        "scheme": "greenblue"
      }
    }
  }
}