date_range_form_field

a flutter package for adding a daterange widget into a form. a date picker ux is provided by showdaterangepicker. the widget will accept inputdecoration or use the default from the app’s theme. additionally, the widget will accept a date format, defaulting to mm-dd-yyyy.

usage

this widget should be used like any other formfield within a form.
it is important to note that the firstdate and lastdate properties correspond to the first and last valid dates.
this widget must have a materialwidget ancestor, such as a materialapp

example

// import package
import 'package:flutter/material.dart';
import 'package:date_range_form_field/date_range_form_field.dart';

void main() {
  runapp(new myapp());
}

class myapp extends statelesswidget {
  @override
  widget build(buildcontext context) {
    return new materialapp(
      home: myformfield(),
    );
  }
}

// make a form
class myformfield extends statefulwidget {
  @override
  _myformfieldstate createstate() => _myformfieldstate();
}

globalkey myformkey = new globalkey();

class _myformfieldstate extends state<myformfield> {
  datetimerange mydaterange;

  void _submitform() {
    final formstate form = myformkey.currentstate;
    form.save();
  }

  @override
  widget build(buildcontext context) {
    return scaffold(
      appbar: appbar(
        title: text("date range form example"),
      ),
      body: safearea(
        child: form(
          key: myformkey,
          child: column(
            children: [
              safearea(
                child: daterangefield(
                    context: context,
                    decoration: inputdecoration(
                      labeltext: 'date range',
                      prefixicon: icon(icons.date_range),
                      hinttext: 'please select a start and end date',
                      border: outlineinputborder(),
                    ),
                    initialvalue: datetimerange(
                        start: datetime.now(), end: datetime.now()),
                    validator: (value) {
                      if (value.start.isbefore(datetime.now())) {
                        return 'please enter a valid date';
                      }
                      return null;
                    },
                    onsaved: (value) {
                      setstate(() {
                        mydaterange = value;
                      });
                    }),
              ),
              flatbutton(
                child: text('submit'),
                onpressed: _submitform,
              ),
              if(mydaterange != null) text("saved value is: ${mydaterange.tostring()}")
            ],
          ),
        ),
      ),
    );
  }
}