$ curl cheat.sh/
/*
 * Use **`GestureDetector.onPanUpdate`**:
 * ```dart
 * GestureDetector(
 *   onPanUpdate: (details) {
 */
 // Swiping in right direction.
 if (details.delta.dx > 0) {}

 // Swiping in left direction.
 if (details.delta.dx < 0) {}
/*
 *   },
 *   child: YourWidget(),
 * )
 * ```
 * 
 * ---
 * 
 * To cover all the area (passing the parent constraints to the widget),
 * you can include `SizedBox.expand`.
 * 
 * ```dart
 * SizedBox.expand(
 *   child: GestureDetector(
 */
 onPanUpdate: (details) {
   // Swiping in right direction.
   if (details.delta.dx > 0) {}

   // Swiping in left direction.
   if (details.delta.dx < 0) {}
 },
 child: YourWidget(),
/*
 *   ),
 * )
 * ```
 * 
 * [CopsOnRoad] [so/q/55050463] [cc by-sa 3.0]
 */

$
Follow @igor_chubin cheat.sh