33403bd28e
This extracts the sample code out from the API doc comments, and places them in separate files on disk, allowing running of the examples locally, testing them, and building of slightly larger examples.
58 lines
2.0 KiB
Dart
58 lines
2.0 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
// Template: dev/snippets/config/templates/freeform.tmpl
|
|
//
|
|
// Comment lines marked with "▼▼▼" and "▲▲▲" are used for authoring
|
|
// of samples, and may be ignored if you are just exploring the sample.
|
|
|
|
// Flutter code sample for ErrorWidget
|
|
//
|
|
//***************************************************************************
|
|
//* ▼▼▼▼▼▼▼▼ description ▼▼▼▼▼▼▼▼ (do not modify or remove section marker)
|
|
|
|
//
|
|
|
|
//* ▲▲▲▲▲▲▲▲ description ▲▲▲▲▲▲▲▲ (do not modify or remove section marker)
|
|
//***************************************************************************
|
|
|
|
//********************************************************************
|
|
//* ▼▼▼▼▼▼▼▼ code ▼▼▼▼▼▼▼▼ (do not modify or remove section marker)
|
|
|
|
import 'package:flutter/material.dart';
|
|
|
|
void main() {
|
|
ErrorWidget.builder = (FlutterErrorDetails details) {
|
|
bool inDebug = false;
|
|
assert(() {
|
|
inDebug = true;
|
|
return true;
|
|
}());
|
|
// In debug mode, use the normal error widget which shows
|
|
// the error message:
|
|
if (inDebug) {
|
|
return ErrorWidget(details.exception);
|
|
}
|
|
// In release builds, show a yellow-on-blue message instead:
|
|
return Container(
|
|
alignment: Alignment.center,
|
|
child: const Text(
|
|
'Error!',
|
|
style: TextStyle(color: Colors.yellow),
|
|
textDirection: TextDirection.ltr,
|
|
),
|
|
);
|
|
};
|
|
// Here we would normally runApp() the root widget, but to demonstrate
|
|
// the error handling we artificially fail:
|
|
return runApp(Builder(
|
|
builder: (BuildContext context) {
|
|
throw 'oh no, an error';
|
|
},
|
|
));
|
|
}
|
|
|
|
//* ▲▲▲▲▲▲▲▲ code ▲▲▲▲▲▲▲▲ (do not modify or remove section marker)
|
|
//********************************************************************
|