[DatePicker] Include range selector

[andykais]

This is a hopeful suggestion for the v1 Date Picker component since it has yet to be completed.
The v0 date picker suggests suggests using two calendars to pick a range of dates, however this becomes tedious when the calendar is being used for a 'when is good' scenario as opposed to traditional date selection. Eg. the user does not want to select weekends or fridays but wants to select 3 weeks in a row.

Description

Add an option in the date picker to allow the user to drag from one date across any other in the current view. In addition, allow the user to keep the calendar dialog open so they can drag multiple dates areas across the window.

Images & references

react-big-calendar has a good example of what I mean under selectable where the user can drag across several dates and highlight the areas selected. I can get away with react-big-calendar but would prefer if the functionality were here to as to make staying within the spec easier.

This feature request is outside the current spec, but it would only extend the functionality, and the styling would not change much.

Versions

• Material-UI: v1
• React: 15.4.1
• Browser: Google Chrome 57.0.2987.133

[oliviertassinari]

That feature sounds to specific, I don't think that we should be implementing it, instead, we should have an API allowing users to build in on their side. Thanks for raising that issue, it's good to know what people want to build with the DatePicker.

[oliviertassinari]

I have added a composable section in #4787 so we don't forget that issue.