Show canceled events using strikethrough

[MathieuSchopfer]

This is a basic implementation of #278.

[Gitsaibot]

Thank you very much for your work on this. I will test this in the next few days if I have time.

[Gitsaibot]

It seems Re-sorting the Event IDs has negative effects on the month view. Greying out rejected events did not work. Also, the color of the event names changes from white to black in month view(light theme).

[MathieuSchopfer]

Indices would be hard-coded somewhere ? I am going to revert it then. By rejected events, you mean events for which you got an invitation, which you refused ?

[Gitsaibot]

Indices would be hard-coded somewhere ?

I don't know.

By rejected events, you mean events for which you got an invitation, which you refused ?

Yes, indeed.

[MathieuSchopfer]

Thanks for testing !

It seems Re-sorting the Event IDs has negative effects on the month view. Greying out rejected events did not work. Also, the color of the event names changes from white to black in month view(light theme).

It was a stupid mistake on my side. The event TextPaint was overridden by the default paint in some situations. So, re-indexing event IDs has -- as expected -- no side effect. (The opposite would mean that one of the Instances.... or PROJECTION_..._INDEX constants would be defined somewhere out of the Event class, which is not the purpose of a constant.)

I amended the related commit. Feel free to review again.

[jspricke]

Thanks!