Callers can manually validate by calling validate(), or tell the Form to
validate on every change by setting the `autovalidate` parameter.
Fixes https://github.com/flutter/flutter/issues/7219
This patch replaces uses of Flexible with Expanded where we're using
FlexFit.tight. We still need to think of a better name for the
FlexFit.loose variant.
Also, improve the docs for Row, Column, Flex, and RenderFlex to be more
problem-oriented and to give a complete account of the layout algorithn.
Fixes#6960Fixes#5169
FormField is now a widget that can contain any type of field. Input no
longer has special code to handle form fields. Instead, there is a
helper widget InputFormField for using an Input inside a FormField.
Fixes https://github.com/flutter/flutter/issues/6097 and based on
feedback from the same.
* Add a maxLines parameter for multiline Input.
If maxLines is 1, it's a single line Input that scrolls horizontally.
Otherwise, overflowed text wraps and scrolls vertically, taking up at
most `maxLines`.
Also fixed scrolling behavior so that the Input scrolls ensuring the
cursor is always visible.
Fixes https://github.com/flutter/flutter/issues/6271
* oops
* comments
* import
* test and RO.update fix
* constant
* fix.caretRect
