Set theme for OH3 chart

Setup, Configuration and Use Items & Sitemaps
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1
  • Platform information:
    • openHAB version: 3.0.1
  • Issue of the topic: How can I set the theme for an OH3 chart?
    Apache Echarts defines some default themes.
    How can I set those themes in OH3 configuration?

Your help would be very much appreciated.

2

The theme parameter is not configurable at the moment, but can be added easily - did a quick spike and having chart:

Screenshot 2021-02-16 at 17.02.48
Screenshot 2021-02-16 at 17.02.481822×1714 163 KB

applying theme:

config:
  label: Test
  chartType: day
  theme:
    color:
      - "#4ea397"
      - "#22c3aa"
      - "#7bd9a5"
      - "#d0648a"
      - "#f58db2"
      - "#f2b3c9"
    line:
      lineStyle:
        width: 2
      symbolSize: 8
      symbol: triangle
slots:
...

renders chart as below

Screenshot 2021-02-16 at 17.03.07
Screenshot 2021-02-16 at 17.03.071826×1714 160 KB

So for exposing the theme parameter a small change would be required in Main UI codebase. Out of curiosity - is there any parameter you cannot set without theme?

3

Honestly I am just discovering echarts. I figured that themes would be handy to change style (just to improve visibility of overlapping lines). Whether the same effect could be otherwise, I don’t know.