session_shells/ermine/shell/lib/src/widgets/launch_button.dart

// Copyright 2021 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:ermine/src/states/app_state.dart';
import 'package:flutter/material.dart';

/// Defines a button to display system overlays persistently.
class LaunchButton extends StatelessWidget {
  final AppState appState;

  const LaunchButton(this.appState);

  @override
  Widget build(BuildContext context) {
    return Material(
      type: MaterialType.transparency,
      child: Ink(
        width: 64,
        height: 64,
        decoration: ShapeDecoration(
          color: Colors.transparent,
          shape: CircleBorder(),
        ),
        child: IconButton(
          autofocus: !appState.sideBarVisible,
          iconSize: 32,
          onPressed: appState.showOverlay,
          padding: EdgeInsets.all(12),
          icon: Image.asset(
            'images/Fuchsia-logo-2x.png',
            color: Theme.of(context).colorScheme.onSurface,
          ),
          tooltip: 'Show App Launcher',
        ),
      ),
    );
  }
}