Develop column tooltips

Developers can extend Datagrok with column tooltips. This could be done by defining a function annotated with special comments. It should take a column with specified semType, return DG.Widget and have a tag tooltip. This is it!

The following example defines a tooltip for the column that has semType: Macromolecule.

//name: sequenceTooltip
//tags: tooltip
//input: column col {semType: Macromolecule}
//output: widget result
export async function sequenceTooltip(col: DG.Column) {
  const tv = grok.shell.tv;
  let viewer = await tv.dataFrame.plot.fromType('WebLogo', {sequenceColumnName: col.name});
  return viewer;
}

Once a package containing that function is published, the platform will automatically create the corresponding tooltip for the designated column. Here is how it looks: