Roll Observatory packages and add a roll script

packages/charted/examples/charts/components/demo_custom_axis.dart

+/*
+ * Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file or at
+ * https://developers.google.com/open-source/licenses/bsd
+ */
+
+library charted.demo.charts.custom_axis;
+
+import 'dart:html';
+import 'package:charted/charts/charts.dart';
+import 'package:charted/core/scales.dart';
+
+List COLUMNS = [
+    new ChartColumnSpec(label:'Month', type:ChartColumnSpec.TYPE_STRING),
+    new ChartColumnSpec(label:'Precipitation'),
+    new ChartColumnSpec(label:'High Temperature'),
+    new ChartColumnSpec(label:'Low Temperature'),
+    new ChartColumnSpec(label:'Random'),
+    new ChartColumnSpec(label:'Extra1'),
+    new ChartColumnSpec(label:'Extra2'),
+    new ChartColumnSpec(label:'Extra3'),
+  ];
+
+List DATA = [
+    ['January',  4.50, 27, 46, 1,   20, 23, 1],
+    ['February', 4.61, 60, 28, 10,  15, 45, 23],
+    ['March',    3.26, 32, 49, 100, 4,  34, 1],
+    ['April',    1.46, 63, 49, 30,  34, 89, 3]
+  ];
+
+main() {
+  // Default Chart
+  var series1 = new ChartSeries("one", [1, 3, 2, 6],
+          new StackedBarChartRenderer()),
+      data = new ChartData(COLUMNS, DATA),
+      config = new ChartConfig([series1], [0]),
+      area = new CartesianArea(querySelector('.default'),
+          data, config, autoUpdate:false, useTwoDimensionAxes:false);
+  area.draw();
+
+  // Chart with custom measure axis with specific domain on the scale.
+  var series2 = new ChartSeries("one", [1, 3, 2, 6],
+          new StackedBarChartRenderer(),
+          // measureAxisId matches the id later used in registerMeasureAxis().
+          measureAxisIds: ['fixed_domain']),
+      data2 = new ChartData(COLUMNS, DATA),
+      config2 = new ChartConfig([series2], [0]);
+
+  // Add custom scale and axis config.
+  var scale = new LinearScale();
+  scale.domain = [0, 1000];
+  var axisConfig = new ChartAxisConfig();
+  axisConfig.title = 'Axis title';
+  axisConfig.scale = scale;
+
+  config2.registerMeasureAxis('fixed_domain', axisConfig);
+  var customAxisChart = new CartesianArea(querySelector('.custom-domain'),
+          data2, config2, autoUpdate:false, useTwoDimensionAxes:false);
+  customAxisChart.draw();
+
+  // Chart with custom measure axis with specific tick values.
+  var series3 = new ChartSeries("one", [1, 3, 2, 6],
+      new StackedBarChartRenderer(),
+  // measureAxisId matches the id later used in registerMeasureAxis().
+      measureAxisIds: ['fixed_ticks']),
+  data3 = new ChartData(COLUMNS, DATA),
+  config3 = new ChartConfig([series3], [0]);
+
+  // Add custom scale and axis config.
+  var scale2 = new LinearScale();
+  scale2.domain = [0, 300];
+  var axisConfig2 = new ChartAxisConfig();
+  axisConfig2.title = 'Axis title';
+  axisConfig2.scale = scale2;
+  axisConfig2.tickValues = [0, 25, 50, 230, 250];
+
+  config3.registerMeasureAxis('fixed_ticks', axisConfig2);
+  var fixedTickValueChart = new CartesianArea(querySelector('.custom-ticks'),
+          data3, config3, autoUpdate:false, useTwoDimensionAxes:false);
+  fixedTickValueChart.draw();
+}