calendar: month picker / drop downs for begin and end-date within the dialog

[andreaschu]

As a respondent I want to select or change the begin and end- dates easily. As a researcher and a developer I want to asure that only dates within the range and no implausible dates (e. g. 30.02.2020) can be filled in. As a researcher I also want to reduce the cognitive load for the respondents in the way, they only should think of answers on a monthly basis intstead of a daily basis.

[vdick]

this could be a possible alternative for dropdowns https://jsfiddle.net/cfzd5hy1/1/ (to make the dialog more clear)

[vdick]

this is the representation with dropdowns

[vdick]

input fields(start/end) have been replaced by dropdowns

[andreaschu]

This is already a good solution. Thus, to my mind it would be better to have the month-picker. I imagine it is easier to controll the range of the possible dates, especially when the ranges begins or ends in the middle of a year.

[vdick]

month picker is in progress :)

[vdick]

this could be the solution: https://kidsysco.github.io/jquery-ui-month-picker/

[andreaschu]

• [x] start date and end date have to begin with activated months (set start date by config parameter)
• [x] converting dates of moth picker into used date format (json)
• [x] detain end date to be before start date