queryverse / queryverse/ElectronDisplay.jl
Color is rendered incorrectly if it is passed via `datum`.
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- Dominant language
- CSS
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- 89
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- Avg merge
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Description
On the current master, the color is rendered incorrectly if it is set via the datum property.
The bug can be reproduced using the following code:
using VegaLite: @vlplot
@vlplot() + @vlplot(mark = :point, x = rand(10), y = rand(10), color = {datum = "class 1"}) + @vlplot(mark = :point, x = rand(10), y = rand(10), color = {datum = "class 2"})
In Firefox and Chromium, this renders correctly as:
When using ElectronDisplay with the current master (e421241) the color channel is ignored:
Edit: This used to work with v0.8.
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the provided @vlplot reproduction using ElectronDisplay, comparing its output with Firefox or Chromium and the v0.8 behavior. Trace how the color channel is handled for datum values in the ElectronDisplay rendering path. Done means the two point layers render their distinct datum colors correctly in ElectronDisplay.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- electron, julia
- Domain
- data-visualization, desktop
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100