Show due tasks like in indicator

[cassidyjames]

Problem

We show due tasks on the calendar in the date & time indicator, but when opening the calendar itself to get an overview of your schedule, you can't see these tasks.

Brought up at 14:05 at https://youtu.be/FNNFtM95fZY

Proposal

We should probably show tasks with due dates on the calendar itself.

Prior Art (Optional)

No response

[cassidyjames]

Welp, this is a bug with reporting issues from the Android app using issue forms; it takes you to the .github repo, instead. 🙃

[mcclurgm]

I suppose that does make sense.. A couple logistical things that come to mind:

• This is more likely to hit performance issues on GTK3 than just events, and we’re already seeing performance issues. We may want to see if we can reuse Marco’s virtualizing list widget, or maybe wait until we can port to GTK4.
• I imagine this would require having a copy of the task code in calendar. Not to bring up the ghost of PRs past, but if we do this would we want to do something to unify and share the model code? That would mean having two separate models in three places each.
  3. This may not be much of an issue, but having many tasks could overwhelm the month view easily. On a 13” screen (which I imagine is the most common?) you can only see 4 events per day, and adding tasks to that could be overwhelming. As a thought, we could include a single “X tasks” entry in the grid view and show the individual tasks in the sidebar. I’m not sure if that’s a good idea though.