Question

I have a DatePicker in ExtJS4. I only want to allow TWO dates for each month. The 15th and last day (30/31/28/29 depending on month/year)

How can I disable every day in the picker but allow those two dates?

Answer 1

See disabledDates config option for Ext.form.field.Date

From API docs:

disabledDates : String[] An array of “dates” to disable, as strings.
These strings will be used to build a dynamic regular expression so
they are very powerful. Some examples:

// disable these exact dates:
disabledDates: ["03/08/2003", "09/16/2003"]
// disable these days for every year:
disabledDates: ["03/08", "09/16"]
// only match the beginning (useful if you are using short years):
disabledDates: ["^03/08"]
// disable every day in March 2006:
disabledDates: ["03/../2006"]
// disable every day in every March:
disabledDates: ["^03"]

Note that the format of the dates included in the array should exactly
match the format config. In order to support regular expressions, if
you are using a date format that has “.” in it, you will have to
escape the dot when restricting dates. For example: [“03\.08\.03”].