comunicmobile/lib/utils/ui_utils.dart

import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter/material.dart';

/// User interface utilities

/// 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<Widget> actions}) {
  return Card(
    elevation: 2.0,
    color: Colors.red,
    child: Padding(
      padding: const EdgeInsets.all(8.0),
      child: Row(
        children: <Widget>[
          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 ? <Widget>[] : 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,
    );

  }));
}