import 'package:cached_network_image/cached_network_image.dart'; import 'package:comunic/utils/intl_utils.dart'; import 'package:flutter/material.dart'; /// User interface utilities /// /// @author Pierre HUBERT /// Build centered progress bar Widget buildCenteredProgressBar() { return Center( child: CircularProgressIndicator(), ); } /// Build and return a full loading page Widget buildLoadingPage() { return Scaffold( body: buildCenteredProgressBar(), ); } /// Build and return an error card Widget buildErrorCard(String message, {List actions}) { return Card( elevation: 2.0, color: Colors.red, child: Padding( padding: const EdgeInsets.all(8.0), child: Row( children: [ Padding( padding: const EdgeInsets.only(right: 8.0), child: Icon( Icons.error, color: Colors.white, ), ), Flexible( child: Text( message, style: TextStyle(color: Colors.white), maxLines: null, ), ), Row( children: actions == null ? [] : actions, ) ], ), ), ); } /// Show an image with a given [url] in full screen void showImageFullScreen(BuildContext context, String url) { Navigator.of(context).push(MaterialPageRoute(builder: (c) { // TODO : add better support later return CachedNetworkImage( imageUrl: url, ); })); } /// Show simple snack void showSimpleSnack(BuildContext context, String message) { Scaffold.of(context).showSnackBar(SnackBar(content: Text(message))); } /// Show an alert dialog to ask the user to enter a string Future askUserString({ @required BuildContext context, @required String title, @required String message, @required String defaultValue, @required String hint, }) async { assert(context != null); assert(title != null); assert(message != null); assert(defaultValue != null); assert(hint != null); TextEditingController controller = TextEditingController(text: defaultValue); final confirm = await showDialog( context: context, builder: (c) => AlertDialog( title: Text(title), content: Column( children: [ Text(message), TextField( controller: controller, maxLines: null, maxLength: 200, keyboardType: TextInputType.text, decoration: InputDecoration( labelText: hint, alignLabelWithHint: true, ), ) ], ), actions: [ FlatButton( child: Text(tr("Cancel").toUpperCase()), onPressed: () => Navigator.pop(c, false), ), FlatButton( child: Text(tr("OK")), onPressed: () => Navigator.pop(c, true), ), ], )); if (confirm == null || !confirm) return null; return controller.text; }