Roll Observatory packages and add a roll script

packages/charted/examples/charts/renderers/demo_line_charts.dart

Index: packages/charted/examples/charts/renderers/demo_line_charts.dart
diff --git a/packages/charted/examples/charts/renderers/demo_line_charts.dart b/packages/charted/examples/charts/renderers/demo_line_charts.dart
new file mode 100644
index 0000000000000000000000000000000000000000..269c6d32f7499f60e493d72249d76a29465dcd37
--- /dev/null
+++ b/packages/charted/examples/charts/renderers/demo_line_charts.dart
@@ -0,0 +1,90 @@
+
+library charted.demo.charts.line_charts;
+
+import "dart:html";
+import "package:charted/charts/charts.dart";
+import "../demo_charts.dart";
+
+void drawOrdinalLineChart(String selector) {
+  var wrapper = document.querySelector(selector),
+      areaHost = wrapper.querySelector('.chart-host'),
+      legendHost = wrapper.querySelector('.chart-legend-host');
+
+  var series = new ChartSeries("one", [2, 3] , new LineChartRenderer()),
+      config = new ChartConfig([series], [0])
+        ..legend = new ChartLegend(legendHost),
+      data = new ChartData(ORDINAL_DATA_COLUMNS, ORDINAL_DATA),
+      state = new ChartState();
+
+  var area = new CartesianArea(areaHost, data, config, state: state);
+
+  createDefaultCartesianBehaviors().forEach((behavior) {
+    area.addChartBehavior(behavior);
+  });
+  area.draw();
+}
+
+void drawOrdinalWithBreaks(String selector) {
+  var wrapper = document.querySelector(selector),
+      areaHost = wrapper.querySelector('.chart-host'),
+      legendHost = wrapper.querySelector('.chart-legend-host');
+
+  var series = new ChartSeries("one", [2, 3], new LineChartRenderer()),
+      config = new ChartConfig([series], [0])
+        ..legend = new ChartLegend(legendHost),
+      data = new ChartData(ORDINAL_DATA_COLUMNS, ORDINAL_DATA_WITH_BREAKS),
+      state = new ChartState();
+
+  var area = new CartesianArea(areaHost, data, config, state: state);
+
+  createDefaultCartesianBehaviors().forEach((behavior) {
+    area.addChartBehavior(behavior);
+  });
+  area.draw();
+}
+
+void drawOrdinalWithNegative(String selector) {
+  var wrapper = document.querySelector(selector),
+      areaHost = wrapper.querySelector('.chart-host'),
+      legendHost = wrapper.querySelector('.chart-legend-host');
+
+  var series = new ChartSeries("one", [2, 3] , new LineChartRenderer()),
+      config = new ChartConfig([series], [0])
+        ..legend = new ChartLegend(legendHost),
+      data = new ChartData(ORDINAL_DATA_COLUMNS, ORDINAL_DATA_WITH_NEGATIVE),
+      state = new ChartState();
+
+  var area = new CartesianArea(areaHost, data, config, state: state);
+
+  createDefaultCartesianBehaviors().forEach((behavior) {
+    area.addChartBehavior(behavior);
+  });
+  area.draw();
+}
+
+void drawTimeSeriesChart(String selector) {
+  var wrapper = document.querySelector(selector),
+      areaHost = wrapper.querySelector('.chart-host'),
+      legendHost = wrapper.querySelector('.chart-legend-host');
+
+  var series = new ChartSeries("one", [1, 2, 3], new LineChartRenderer()),
+      config = new ChartConfig([series], [0])
+        ..legend = new ChartLegend(legendHost),
+      data = new ChartData(TIMESERIES_DATA_COLUMNS, TIMESERIES_DATA),
+      state = new ChartState();
+
+  var area = new CartesianArea(areaHost, data, config, state: state);
+
+  createDefaultCartesianBehaviors().forEach((behavior) {
+    area.addChartBehavior(behavior);
+  });
+  area.draw();
+}
+
+main() {
+  drawOrdinalLineChart('#ordinal-line-chart');
+  drawOrdinalWithBreaks('#ordinal-with-breaks');
+  drawOrdinalWithNegative('#ordinal-with-negative');
+  drawTimeSeriesChart('#time-series-chart');
+}
+