Converted Observatory isolate-summary element

runtime/observatory/lib/src/elements/isolate/counter_chart.dart

+// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'dart:html';
+import 'dart:async';
+import 'package:charted/charted.dart';
+import "package:charted/charts/charts.dart";
+import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
+import 'package:observatory/src/elements/helpers/tag.dart';
+
+class IsolateCounterChartElement extends HtmlElement implements Renderable {
+  static const tag =
+    const Tag<IsolateCounterChartElement>('isolate-counter-chart');
+
+  RenderingScheduler<IsolateCounterChartElement> _r;
+
+  Stream<RenderedEvent<IsolateCounterChartElement>> get onRendered =>
+      _r.onRendered;
+
+  Map _counters;
+  StreamSubscription _subscription;
+
+  factory IsolateCounterChartElement(Map counters, {RenderingQueue queue}) {
+    assert(counters != null);
+    IsolateCounterChartElement e = document.createElement(tag.name);
+    e._r = new RenderingScheduler(e, queue: queue);
+    e._counters = counters;
+    return e;
+  }
+
+  IsolateCounterChartElement.created() : super.created();
+
+  @override
+  void attached() {
+    super.attached();
+    _r.enable();
+    _subscription = window.onResize.listen((_) => _r.dirty());
+  }
+
+  @override
+  void detached() {
+    super.detached();
+    children = [];
+    _r.disable(notify: true);
+    _subscription.cancel();
+  }
+
+  void render() {
+    var areaHost;
+    var legendHost;
+    children = [
+      areaHost = new DivElement()..classes = ['host'],
+      legendHost = new DivElement()..classes = ['legend']
+    ];
+    final series = new ChartSeries("Work", [1], new PieChartRenderer(
+      sortDataByValue: false
+    ));
+    var rect = areaHost.getBoundingClientRect();
+    var minSize = new Rect.size(rect.width, rect.height);
+    final config = new ChartConfig([series], [0])
+        ..minimumSize = minSize
+        ..legend = new ChartLegend(legendHost, showValues: true);
+    final data = new ChartData([
+        new ChartColumnSpec(label: 'Type', type: ChartColumnSpec.TYPE_STRING),
+        new ChartColumnSpec(label: 'Percent', formatter: (v) => v.toString())
+      ], _counters.keys
+          .map((key) => [key, double.parse(_counters[key].split('%')[0])])
+          .toList());
+
+    new LayoutArea(areaHost, data, config, state: new ChartState(),
+        autoUpdate: true)
+      ..addChartBehavior(new Hovercard())
+      ..addChartBehavior(new AxisLabelTooltip())
+      ..draw();
+  }
+}