special dialog when editing repeating events [$145]

[georgehrke]

When editing a repeating event the calendar needs a special dialog:

Do you want to change only this or this and all upcoming occurrences?

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[georgehrke]

requires #142 to be fixed

[bohni]

There should be three possibilities:

• Only this event (eg. delete/change)
• This and all upcoming events (eg. delete/change)
• All events (eg. typo in title),

[georgehrke]

I honestly don't see a need for three options. The two mentioned in the description should be just fine.

All events (eg. typo in title),

You usually don't spot a typo in a title 3 month after creating it. You will most certainly spot it right after creating the event.
Editing past events happens very very rarely. Ordinary users probably never change past events.

The ordinary use cases here are:

• location changes for one or all future occurrences. You wouldn't change the location for past events, because they already took place.
• same goes for additional attendees. New attendees for one or all future occurrences didn't attend the previous events, so why add them?
• deleting one or all future occurrences. The past ones still took place, so why remove them?

Having two or three buttons is a big difference from a usability point of view. The user has more input to parse. It clutters the interface and makes it less intuitive to use.

Would be good to get more input here. @nextcloud/calendar @jancborchardt @eppfel

[claell]

To me it seems strange to not have the option to change all events, although it might not be necessary.

Regarding typos: There can also be ones spotted some time after creation.

[raimund-schluessler]

Just for the record, Thunderbird gives

• Edit just this occurrence
• Edit all occurrences

However, I would show

• Edit just this occurrence
• Edit all future occurrences

And if 'now' is given by the selected event, you could still edit past events by navigating to the first occurrence and edit this one with 'all future occurrences' which would lead to effectively editing all occurrences.

[heikojansen]

Both Google Calendar and Novell GroupWise offer all three options (with GCal apparently resetting prior modifications to other events if "edit all events" is selected).