ExpandTapArea

Manually expand the tap area of a widget without changing its size or layout. Similar with the hitTest in iOS development.

Context

In the Human Interface Guidelines, Apple recommends a minimum target size of 44 x 44 px. 
In the Android Material Design Guidelines, it’s suggested that touch targets should be at least 48 x 48 dp.

Inspired by issue

Usage

ExpandTapWidget(
  onTap: () {},
  tapPadding: EdgeInsets.all(25.0),
  child: smallWidget(),
),

Demo

Attention

1. ExpandTapWidget can be wrapped inside/outside GestureDetector: To avoid the conflict of gesture, it is better to apply on the innermost/smallest widget.
2. The expanded area wouldn't exceed the boundary of the Parent Box. You can set debugPaintExpandAreaEnabled = true to display the actual expanded area.