How to create a timeline chart for window sensors?

[fl0w (Flow)]

So far, the best answer I have found for this question is

Colored graph support for switch, contact and text items

If you press the “Analyze” button on the configuration page of a switch item it should give you a (full-screen) page of the switch. For switches (and also for contact items) it is possible to create a chart page like the one in your screenshot, but it requires some additional work: Create a standard line chart with your switch item In the chart editor switch to “Code” Tab In the - component: oh-time-series section replace the line item: xxxx with markArea: - component: oh-…

However, it seems to be non-trival to design such a chart. I will see how far I can get and share the code once/if I succeed.