docs(examples): Add example showing how to set the zorder via a conditional order encoding #9136
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joelostblom
changed the title
kanitw
reviewed
Oct 12, 2023
| }, | ||
| "order": { | ||
| "value": 0, | ||
| "condition": {"param": "param_122", "value": 1, "empty": false} |
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For consisistency with size and to make it reads like if-then-else, better put condition above value.
kanitw
reviewed
Oct 12, 2023
| @@ -413,7 +413,7 @@ The key channel can enable object constancy for transitions over dynamic data. W | |||
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| ## Order Channel | |||
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| `order` channel can define a data field (or a ordered list of data fields) that are used to sorts stacking order for stacked charts (see [an example in the `stack` page](stack.html#order)) and the order of data points in line marks for connected scatterplots (see [an example in the `line` page](line.html#connected-scatter-plot)). | |||
| `order` channel can define a data field (or a ordered list of data fields) that are used to sorts stacking order for stacked charts (see [an example in the `stack` page](stack.html#order)), the order of data points in line marks for connected scatterplots (see [an example in the `line` page](line.html#connected-scatter-plot)), and which data points are plotted on top in a chart (the "zorder", see [an example in the gallery]({{ site.baseurl }}/examples/selection_type_point_zorder.html)). | |||
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(the "zorder", see [an example in the gallery]({{ site.baseurl }}/examples/selection_type_point_zorder.html)) --> I think this URL probably doesn't work unless you add it to examples.json.
I think you can add this example to the end of the following block in examples.json. :)
"Interactive": {
"Interactive Charts": [
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Thanks for adding the example! :) |
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Thanks for the quick review @kanitw ! I believe I have addressed your comment in my last couple of commits, so please have another look. |
kanitw
approved these changes
Oct 28, 2023
kanitw
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This adds an example of how to make a point appear on top when it is hovered over, instead of it being covered by other points based on the initial plotting order. This was discussed in #4864 and #1684, but I couldn't find an example that demonstrates this behavior. I would presume that setting the zorder like this is more performant than having a second layer that responds to a filter transform linked to to the selection, which is what I have used myself in the past.
Open the Chart in the Vega Editor