Visibility is not working for line marks

[Moritz Heckmann]

zoommark.webm

I am not sure if this intended or not. But it seems that the line mark is not working with semantic visibility.

The relevant section in the spec is this:

"visibility": [ { "measure": "zoomLevel", "target": "mark", "threshold": 1000000, "operation": "LT", "transitionPadding": 1000000 } ]

[etowahadams]

Thanks for submitting and issue! This does seem to be a bug.

In the short term, you might get a similar desired effect by changing "point" to "bar".

Here is the spec to reproduce. Change "point" to "line" or "bar" to observe the differences. We expect "line" to behave like "point" and"bar" (not visible when zoomed out) but unexpectedly it is visible at all levels of zoom.

{
      "xDomain": {"chromosome": "chr13", "interval": [31500000, 33150000]},
      "centerRadius": 0.1,
      "layout": "linear",
      "spacing": 0,
      "alignment": "stack",
      "tracks": [
        {
          "alignment": "overlay",
          "data": {
            "url": "https://server.gosling-lang.org/api/v1/tileset_info/?d=clinvar-beddb",
            "type": "beddb",
            "genomicFields": [
              {"index": 1, "name": "start"},
              {"index": 2, "name": "end"}
            ],
            "valueFields": [
              {"index": 7, "name": "significance", "type": "nominal"}
            ]
          },
          "tracks": [
            {
              "mark": "bar",
              "x": {"field": "start", "type": "genomic"},
              "y": {
                "field": "significance",
                "type": "nominal",
                "domain": [
                  "Pathogenic",
                  "Pathogenic/Likely_pathogenic",
                  "Likely_pathogenic",
                  "Uncertain_significance",
                  "Likely_benign",
                  "Benign/Likely_benign",
                  "Benign"
                ],
                "baseline": "Uncertain_significance",
                "range": [150, 20]
              },
              "size": {"value": 1},
              "color": {"value": "lightgray"},
              "stroke": {"value": "lightgray"},
              "strokeWidth": {"value": 1},
              "opacity": {"value": 0.3},
              "visibility": [
                {
                  "measure": "zoomLevel",
                  "target": "mark",
                  "threshold": 100000,
                  "operation": "LT",
                  "transitionPadding": 100000
                }
              ]
            },
            {
              "mark": "point",
              "x": {"field": "start", "type": "genomic"},
              "row": {
                "field": "significance",
                "type": "nominal",
                "domain": [
                  "Pathogenic",
                  "Pathogenic/Likely_pathogenic",
                  "Likely_pathogenic",
                  "Uncertain_significance",
                  "Likely_benign",
                  "Benign/Likely_benign",
                  "Benign"
                ]
              },
              "size": {"value": 7},
              "opacity": {"value": 0.8},
              "visibility": [
                {
                  "measure": "zoomLevel",
                  "target": "mark",
                  "threshold": 1000000,
                  "operation": "LT",
                  "transitionPadding": 1000000
                }
              ]
            },
            {
              "data": {
                "url": "https://server.gosling-lang.org/api/v1/tileset_info/?d=clinvar-multivec",
                "type": "multivec",
                "row": "significance",
                "column": "position",
                "value": "count",
                "categories": [
                  "Benign",
                  "Benign/Likely_benign",
                  "Likely_benign",
                  "Uncertain_significance",
                  "Likely_pathogenic",
                  "Pathogenic/Likely_pathogenic",
                  "Pathogenic"
                ],
                "binSize": 4
              },
              "mark": "bar",
              "x": {"field": "start", "type": "genomic"},
              "xe": {"field": "end", "type": "genomic"},
              "y": {"field": "count", "type": "quantitative", "axis": "none"},
              "color": {
                "field": "significance",
                "type": "nominal",
                "domain": [
                  "Pathogenic",
                  "Pathogenic/Likely_pathogenic",
                  "Likely_pathogenic",
                  "Uncertain_significance",
                  "Likely_benign",
                  "Benign/Likely_benign",
                  "Benign"
                ],
                "range": [
                  "#CB3B8C",
                  "#CB71A3",
                  "#CB96B3",
                  "gray",
                  "#029F73",
                  "#5A9F8C",
                  "#5A9F8C"
                ],
                "legend": true
              },
              "visibility": [
                {
                  "measure": "zoomLevel",
                  "target": "mark",
                  "threshold": 500000,
                  "operation": "GT",
                  "transitionPadding": 500000
                }
              ]
            }
          ],
          "color": {
            "field": "significance",
            "type": "nominal",
            "domain": [
              "Pathogenic",
              "Pathogenic/Likely_pathogenic",
              "Likely_pathogenic",
              "Uncertain_significance",
              "Likely_benign",
              "Benign/Likely_benign",
              "Benign"
            ],
            "range": [
              "#CB3B8C",
              "#CB71A3",
              "#CB96B3",
              "gray",
              "#029F73",
              "#5A9F8C",
              "#5A9F8C"
            ]
          },
          "width": 800,
          "height": 150
        }
      ]
    }