The list of tracks for the hg38 genome has the sample names for bigBarChart listed as barChartBars: https://api.genome.ucsc.edu/list/tracks?genome=hg38;trackLeavesOnly=1

"bloodHaoCellType": {
      "shortLabel": "Blood PBMC Cells",
      "type": "bigBarChart",
      "longLabel": "Blood (PBMCs) binned by cell type (level 1) from Hao et al 2020",
      "parent": "bloodHao",
      "visibility": "pack",
      "barChartColors": "#fe3247 #fe3248 #fe3248 #e92812 #e02900 #fb2e3e #f01111 #fe3247",
      "group": "singleCell",
      "html": "bloodHao",
      "barChartUnit": "UMI/cell",
      "transformFunc": "NONE",
      "barChartMetric": "mean",
      "barChartBars": "B_cell T_cell_CD4+ T_cell_CD8+ dendritic_cell_(DC) monocyte natural_killer_cell_(NK) other T_cell_other",
      "barChartStatsUrl": "/gbdb/hg38/bbi/bloodHao/cell_type.stats",
      "superTrack": "on",
      "bigDataUrl": "/gbdb/hg38/bbi/bloodHao/cell_type.bb",
      "barChartLimit": "2",
      "urlLabel": "View on the UCSC Cell Browser:",
      "defaultLabelFields": "name",
      "url": "https://cells.ucsc.edu/?ds=multimodal-pbmc+sct&gene=$$"
    }

It also has the colors which is interesting, as barChartColors. If we wanted to really go in deep on this one, we could make a bed file that is color coded using their provided colors. This might be a lot of work, so might not be worth it, but it would be neat if we made each cell type its own line in the bed file. I attached an example file, bloodHaoCellType.bed, to show what this could look like in IGB. Compare to the UCSC.

As discussed with Nowlan Freese, made changes to the code to load the data as different lines in IGB along with the barChartCategory names as the name for each line and mapped the name and name2 values from the API to title and props. Below is the branch where all the code changes are present: https://bitbucket.org/jaya-sravani/integrated-genome-browser/branch/IGBF-3659. Nowlan Freese Please review and let me know if there's any issue. Tested the code and is working as expected, here is the screenshot:

Also, we observed that it is very tough to search for a track in the available tracks panel as there are a lot of tracks in the hg38 genome so as discussed with Nowlan Freese will be investigating a way to make folders for each file type inside the UCSC Rest folder, created a ticket for this: https://jira.bioviz.org/browse/IGBF-3689

Everything appears to be loading correctly.

The only question I have is can we include the barChartColors as itemrgb? The barChartColors are being passed as hex colors so they would need to be parsed to rgb.

Updated the code to add the color as the ITEM_RGB property, now the strands can be colored by using the RGB option in the dropdown. The updated code is available at: https://bitbucket.org/jaya-sravani/integrated-genome-browser/branch/IGBF-3659. Tested the code, working as expected, below is the screenshot:

ITEM_RGB is showing correctly.

My last concern before creating a pull request is the inclusion of commit 5ade3ce in the PR. I think it would be better to PR that commit separately as part of IGBF-3660 to avoid confusion later. If you could do that and create a PR for 3659 and 3660 that would be great.

Raised separate PRs for both Nowlan Freese. Updated PR for this story is: https://bitbucket.org/lorainelab/integrated-genome-browser/pull-requests/998. Please review and let me know if there are any issues.

PR is merged.

Installers are built and deployed to early release section of web site.

Tested main branch Mac.

barChart is loading correctly, no errors in log.

Closing ticket.