Add flutter_web samples (#75)

2026-04-04 18:51:05 +00:00 · 2019-05-07 13:32:08 -07:00
parent 42f2dce01b
commit 3fe927cb29
697 changed files with 241026 additions and 0 deletions
--- a/web/charts/example/lib/time_series_chart/simple.dart
+++ b/web/charts/example/lib/time_series_chart/simple.dart
@@ -0,0 +1,108 @@
+// Copyright 2018 the Charts project authors. Please see the AUTHORS file
+// for details.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/// Timeseries chart example
+// EXCLUDE_FROM_GALLERY_DOCS_START
+import 'dart:math';
+// EXCLUDE_FROM_GALLERY_DOCS_END
+import 'package:charts_flutter/flutter.dart' as charts;
+import 'package:flutter_web/material.dart';
+
+class SimpleTimeSeriesChart extends StatelessWidget {
+  final List<charts.Series> seriesList;
+  final bool animate;
+
+  SimpleTimeSeriesChart(this.seriesList, {this.animate});
+
+  /// Creates a [TimeSeriesChart] with sample data and no transition.
+  factory SimpleTimeSeriesChart.withSampleData() {
+    return new SimpleTimeSeriesChart(
+      _createSampleData(),
+      // Disable animations for image tests.
+      animate: false,
+    );
+  }
+
+  // EXCLUDE_FROM_GALLERY_DOCS_START
+  // This section is excluded from being copied to the gallery.
+  // It is used for creating random series data to demonstrate animation in
+  // the example app only.
+  factory SimpleTimeSeriesChart.withRandomData() {
+    return new SimpleTimeSeriesChart(_createRandomData());
+  }
+
+  /// Create random data.
+  static List<charts.Series<TimeSeriesSales, DateTime>> _createRandomData() {
+    final random = new Random();
+
+    final data = [
+      new TimeSeriesSales(new DateTime(2017, 9, 19), random.nextInt(100)),
+      new TimeSeriesSales(new DateTime(2017, 9, 26), random.nextInt(100)),
+      new TimeSeriesSales(new DateTime(2017, 10, 3), random.nextInt(100)),
+      new TimeSeriesSales(new DateTime(2017, 10, 10), random.nextInt(100)),
+    ];
+
+    return [
+      new charts.Series<TimeSeriesSales, DateTime>(
+        id: 'Sales',
+        colorFn: (_, __) => charts.MaterialPalette.blue.shadeDefault,
+        domainFn: (TimeSeriesSales sales, _) => sales.time,
+        measureFn: (TimeSeriesSales sales, _) => sales.sales,
+        data: data,
+      )
+    ];
+  }
+  // EXCLUDE_FROM_GALLERY_DOCS_END
+
+  @override
+  Widget build(BuildContext context) {
+    return new charts.TimeSeriesChart(
+      seriesList,
+      animate: animate,
+      // Optionally pass in a [DateTimeFactory] used by the chart. The factory
+      // should create the same type of [DateTime] as the data provided. If none
+      // specified, the default creates local date time.
+      dateTimeFactory: const charts.LocalDateTimeFactory(),
+    );
+  }
+
+  /// Create one series with sample hard coded data.
+  static List<charts.Series<TimeSeriesSales, DateTime>> _createSampleData() {
+    final data = [
+      new TimeSeriesSales(new DateTime(2017, 9, 19), 5),
+      new TimeSeriesSales(new DateTime(2017, 9, 26), 25),
+      new TimeSeriesSales(new DateTime(2017, 10, 3), 100),
+      new TimeSeriesSales(new DateTime(2017, 10, 10), 75),
+    ];
+
+    return [
+      new charts.Series<TimeSeriesSales, DateTime>(
+        id: 'Sales',
+        colorFn: (_, __) => charts.MaterialPalette.blue.shadeDefault,
+        domainFn: (TimeSeriesSales sales, _) => sales.time,
+        measureFn: (TimeSeriesSales sales, _) => sales.sales,
+        data: data,
+      )
+    ];
+  }
+}
+
+/// Sample time series data type.
+class TimeSeriesSales {
+  final DateTime time;
+  final int sales;
+
+  TimeSeriesSales(this.time, this.sales);
+}