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FLUT-1020062: Enhanced Flutter Treemap UG documentation #1529

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FLUT-1020062: Enhanced Flutter Treemap UG documentation #1529

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83 changes: 43 additions & 40 deletions Flutter/treemap/accessibility.md
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Original file line number Diff line number Diff line change
@@ -1,8 +1,8 @@
---
layout: post
title: Accessibility in Flutter treemap widget | Syncfusion
title: Accessibility in Flutter treemap widget | Syncfusion
description: Learn here all about the accessibility support in Syncfusion Flutter treemap (SfTreemap) widget and how to customize it.
platform: Flutter
platform: flutter
control: SfTreemap
documentation: ug
---
Expand All @@ -11,61 +11,64 @@ documentation: ug

## Screen reader

The [`SfTreemap`](https://pub.dev/documentation/syncfusion_flutter_treemap/latest/treemap/SfTreemap-class.html) can be accessed by the screen readers by wrapping the [`SfTreemap`](https://pub.dev/documentation/syncfusion_flutter_treemap/latest/treemap/SfTreemap-class.html) widget to the [`Semantics`](https://api.flutter.dev/flutter/widgets/Semantics-class.html) widget.
The [`SfTreemap`](https://pub.dev/documentation/syncfusion_flutter_treemap/latest/treemap/SfTreemap-class.html) can be accessed by screen readers by wrapping the [`SfTreemap`](https://pub.dev/documentation/syncfusion_flutter_treemap/latest/treemap/SfTreemap-class.html) widget with the [`Semantics`](https://api.flutter.dev/flutter/widgets/Semantics-class.html) widget.

{% tabs %}
{% highlight Dart %}
{% highlight dart %}

import 'package:flutter/material.dart';
import 'package:syncfusion_flutter_treemap/treemap.dart';

class TreemapAccessibilityExample extends StatefulWidget {
const TreemapAccessibilityExample({super.key});

@override
State<TreemapAccessibilityExample> createState() =>
_TreemapAccessibilityExampleState();
}

class _TreemapAccessibilityExampleState
extends State<TreemapAccessibilityExample> {
late List<PopulationModel> _source;
late String _semanticLabel = 'Asia is the most populated continent and Australia is the least populated continent';
final String _semanticLabel =
'Asia is the most populated continent and Australia is the least populated continent';

@override
void initState() {
_source = const <PopulationModel>[
PopulationModel('Asia', 456.07),
PopulationModel('Africa', 121.61),
PopulationModel('Europe', 74.64),
PopulationModel('North America', 57.9),
PopulationModel('South America', 42.25),
PopulationModel('Australia', 2.54),
_source = <PopulationModel>[
const PopulationModel('Asia', 456.07),
const PopulationModel('Africa', 121.61),
const PopulationModel('Europe', 74.64),
const PopulationModel('North America', 57.9),
const PopulationModel('South America', 42.25),
const PopulationModel('Australia', 2.54),
];
super.initState();
}

@override
void dispose() {
_source.clear();
super.dispose();
}

@override
Widget build(BuildContext context) {
return Scaffold(
body: Semantics(
label: 'Syncfusion Flutter Treemap',
value: _semanticLabel,
child: Column(
children: [
Expanded(
child: SfTreemap(
dataCount: _source.length,
weightValueMapper: (int index) {
return _source[index].populationInCrores;
},
levels: [
TreemapLevel(
groupMapper: (int index) {
return _source[index].continent;
},
),
],
),
),
],
),
label: 'Syncfusion Flutter Treemap',
value: _semanticLabel,
child: SfTreemap(
dataCount: _source.length,
weightValueMapper: (int index) {
return _source[index].populationInCrores;
},
levels: [
TreemapLevel(
groupMapper: (int index) {
return _source[index].continent;
},
),
],
),
),
);
}
}

class PopulationModel {
const PopulationModel(this.continent, this.populationInCrores);
Expand Down Expand Up @@ -96,4 +99,4 @@ The font size of the [`SfTreemap`](https://pub.dev/documentation/syncfusion_flut

## Easier touch targets

The [`SfTreemap`](https://pub.dev/documentation/syncfusion_flutter_treemap/latest/treemap/SfTreemap-class.html) has touch target as 48 * 48 for all elements, following standard accessibility guidelines.
The [`SfTreemap`](https://pub.dev/documentation/syncfusion_flutter_treemap/latest/treemap/SfTreemap-class.html) has touch targets of 48 × 48 pixels for all elements, following standard accessibility guidelines.
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