Add flutter_web samples (#75)

2025-11-09 22:38:42 +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/axes/measure_axis_label_alignment.dart
+++ b/web/charts/example/lib/axes/measure_axis_label_alignment.dart
@@ -0,0 +1,122 @@
+// 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.
+
+/// Custom Tick Label Alignment Example
+// EXCLUDE_FROM_GALLERY_DOCS_START
+import 'dart:math';
+// EXCLUDE_FROM_GALLERY_DOCS_END
+import 'package:flutter_web/material.dart';
+import 'package:charts_flutter/flutter.dart' as charts;
+
+/// Example of using a custom primary measure replacing the renderSpec with one
+/// that aligns the text under the tick and left justifies.
+class MeasureAxisLabelAlignment extends StatelessWidget {
+  final List<charts.Series> seriesList;
+  final bool animate;
+
+  MeasureAxisLabelAlignment(this.seriesList, {this.animate});
+
+  factory MeasureAxisLabelAlignment.withSampleData() {
+    return new MeasureAxisLabelAlignment(
+      _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 MeasureAxisLabelAlignment.withRandomData() {
+    return new MeasureAxisLabelAlignment(_createRandomData());
+  }
+
+  /// Create random data.
+  static List<charts.Series<OrdinalSales, String>> _createRandomData() {
+    final random = new Random();
+
+    final globalSalesData = [
+      new OrdinalSales('2014', random.nextInt(100) * 100),
+      new OrdinalSales('2015', random.nextInt(100) * 100),
+      new OrdinalSales('2016', random.nextInt(100) * 100),
+      new OrdinalSales('2017', random.nextInt(100) * 100),
+    ];
+
+    return [
+      new charts.Series<OrdinalSales, String>(
+        id: 'Global Revenue',
+        domainFn: (OrdinalSales sales, _) => sales.year,
+        measureFn: (OrdinalSales sales, _) => sales.sales,
+        data: globalSalesData,
+      ),
+    ];
+  }
+  // EXCLUDE_FROM_GALLERY_DOCS_END
+
+  @override
+  Widget build(BuildContext context) {
+    return new charts.BarChart(
+      seriesList,
+      animate: animate,
+
+      /// Customize the primary measure axis using a small tick renderer.
+      /// Use String instead of num for ordinal domain axis
+      /// (typically bar charts).
+      primaryMeasureAxis: new charts.NumericAxisSpec(
+          renderSpec: new charts.GridlineRendererSpec(
+        // Display the measure axis labels below the gridline.
+        //
+        // 'Before' & 'after' follow the axis value direction.
+        // Vertical axes draw 'before' below & 'after' above the tick.
+        // Horizontal axes draw 'before' left & 'after' right the tick.
+        labelAnchor: charts.TickLabelAnchor.before,
+
+        // Left justify the text in the axis.
+        //
+        // Note: outside means that the secondary measure axis would right
+        // justify.
+        labelJustification: charts.TickLabelJustification.outside,
+      )),
+    );
+  }
+
+  /// Create series list with single series
+  static List<charts.Series<OrdinalSales, String>> _createSampleData() {
+    final globalSalesData = [
+      new OrdinalSales('2014', 5000),
+      new OrdinalSales('2015', 25000),
+      new OrdinalSales('2016', 100000),
+      new OrdinalSales('2017', 750000),
+    ];
+
+    return [
+      new charts.Series<OrdinalSales, String>(
+        id: 'Global Revenue',
+        domainFn: (OrdinalSales sales, _) => sales.year,
+        measureFn: (OrdinalSales sales, _) => sales.sales,
+        data: globalSalesData,
+      ),
+    ];
+  }
+}
+
+/// Sample ordinal data type.
+class OrdinalSales {
+  final String year;
+  final int sales;
+
+  OrdinalSales(this.year, this.sales);
+}