MaterialBannerClosedReason enum

Specify how a MaterialBanner was closed.

The ScaffoldMessengerState.showMaterialBanner function returns a ScaffoldFeatureController. The value of the controller's closed property is a Future that resolves to a MaterialBannerClosedReason. Applications that need to know how a MaterialBanner was closed can use this value.

Example:

ScaffoldMessenger.of(context).showMaterialBanner(
  const MaterialBanner(
    content: Text('Message...'),
    actions: <Widget>[
      // ...
    ],
  )
).closed.then((MaterialBannerClosedReason reason) {
   // ...
});