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7064551a45
What's important about this code is that it's presenting services outside the VM, not the particular technology used to present the services.
102 lines
2.6 KiB
Dart
102 lines
2.6 KiB
Dart
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:sky' as sky;
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import 'package:sky/services.dart';
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import 'package:sky/src/widgets/basic.dart';
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import 'package:sky/src/widgets/theme.dart';
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import 'package:sky/src/widgets/framework.dart';
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enum IconThemeColor { white, black }
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class IconThemeData {
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const IconThemeData({ this.color });
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final IconThemeColor color;
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}
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class IconTheme extends Inherited {
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IconTheme({
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Key key,
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this.data,
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Widget child
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}) : super(key: key, child: child) {
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assert(data != null);
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assert(child != null);
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}
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final IconThemeData data;
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static IconThemeData of(Component component) {
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IconTheme result = component.inheritedOfType(IconTheme);
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return result?.data;
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}
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bool syncShouldNotify(IconTheme old) => data != old.data;
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}
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AssetBundle _initIconBundle() {
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if (rootBundle != null)
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return rootBundle;
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const String _kAssetBase = '/packages/material_design_icons/icons/';
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return new NetworkAssetBundle(Uri.base.resolve(_kAssetBase));
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}
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final AssetBundle _iconBundle = _initIconBundle();
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class Icon extends Component {
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Icon({
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Key key,
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this.size,
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this.type: '',
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this.color,
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this.colorFilter
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}) : super(key: key);
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final int size;
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final String type;
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final IconThemeColor color;
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final sky.ColorFilter colorFilter;
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String get colorSuffix {
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IconThemeColor iconThemeColor = color;
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if (iconThemeColor == null) {
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IconThemeData iconThemeData = IconTheme.of(this);
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iconThemeColor = iconThemeData == null ? null : iconThemeData.color;
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}
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if (iconThemeColor == null) {
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ThemeBrightness themeBrightness = Theme.of(this).brightness;
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iconThemeColor = themeBrightness == ThemeBrightness.dark ? IconThemeColor.white : IconThemeColor.black;
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}
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switch(iconThemeColor) {
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case IconThemeColor.white:
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return "white";
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case IconThemeColor.black:
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return "black";
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}
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}
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Widget build() {
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String category = '';
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String subtype = '';
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List<String> parts = type.split('/');
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if (parts.length == 2) {
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category = parts[0];
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subtype = parts[1];
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}
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// TODO(eseidel): This clearly isn't correct. Not sure what would be.
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// Should we use the ios images on ios?
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String density = 'drawable-xxhdpi';
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return new AssetImage(
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bundle: _iconBundle,
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name: '${category}/${density}/ic_${subtype}_${colorSuffix}_${size}dp.png',
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width: size.toDouble(),
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height: size.toDouble(),
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colorFilter: colorFilter
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);
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}
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}
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