sky/sdk/lib/widgets/material_button.dart

// Copyright 2015 The Chromium 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 'basic.dart';
import 'button_base.dart';
import 'ink_well.dart';
import 'material.dart';

enum MaterialButtonTheme { light, dark }

// Rather than using this class directly, please use FlatButton or RaisedButton.
abstract class MaterialButton extends ButtonBase {

  MaterialButton({
    String key,
    this.child,
    this.enabled: true,
    this.onPressed,
    this.theme: MaterialButtonTheme.light
  }) : super(key: key);

  Widget child;
  bool enabled;
  Function onPressed;
  MaterialButtonTheme theme;

  void syncFields(MaterialButton source) {
    child = source.child;
    enabled = source.enabled;
    onPressed = source.onPressed;
    theme = source.theme;
    super.syncFields(source);
  }

  Color get color;
  int get level;

  Widget buildContent() {
    Widget contents = new Container(
      padding: new EdgeDims.symmetric(horizontal: 8.0),
      child: new Center(child: child) // TODO(ianh): figure out a way to compell the child to have gray text when disabled...
    );
    return new Listener(
      child: new Container(
        height: 36.0,
        constraints: new BoxConstraints(minWidth: 88.0),
        margin: new EdgeDims.all(8.0),
        child: new Material(
          child: enabled ? new InkWell(child: contents) : contents,
          level: level,
          color: color
        )
      ),
      onGestureTap: (_) { if (onPressed != null && enabled) onPressed(); }
    );
  }

}