Calendar events when user changes month/year

[dlyushukov]

Is your feature request related to a problem? Please describe.

When user clicks on previous/next month arrow icon or select another year from the calendar's header an event should be emitted.

Describe the solution you'd like

New @output events on calendar component should be implemented

Additional context

[zdrawku]

Thank you @dlyushukov for this feature request. @radomirchev @StefanIvanov we might consider the following:

• Add onActiveDateSelection event emitter, that will fire when the active element is changed. We currently have two views month and year and the active element is the current date on calendar initialization. The active element is changed on keyboard navigation as well.

Note: currently we have only onSelection event emitter that fires when a date is selected. Respectively when a year is selected from "years" view the current date will be set as active in the newly selected year.

• Set active date on month/year change. Our default behavior now is selecting (and activating) the current day, and on month change (e.g. with the arrows) the corresponding day of the next/prev month will be selected.

Note: for the cases when the current month doesn't have date equivalent for next/prev month, we will put in "active state" the last day of the month.

Feel free to share your thoughts as well.

As for terminology, we might consider the following - Focused element (13th of April) and active element (14th of April):

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[dlyushukov]

Hello! Any updates on it?

[StefanIvanov]

@zdrawku I think the first approach is a more general solution to the customer request extending the emission of an event on month, year change with additional emission when another date is activated. However, I'd suggest using something like onDateActivation. The second approach would work as well but to me solves just this instance of the problem seen by the customer and is not an ultimate type of solution.