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Saravanan-MadheshSaravanan-Madhesh
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Merge pull request #2 from SyncfusionExamples/882409-How-to-add-a-custom-view
How to add a custom view to the data label of a .NET MAUI chart
2 parents b69e7d5 + 3d22db7 commit 06b7c72

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‎DataLabelTemplate/App.xaml‎

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<?xml version = "1.0" encoding = "UTF-8" ?>
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<Application xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
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xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
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xmlns:local="clr-namespace:DataLabelTemplate"
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x:Class="DataLabelTemplate.App">
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<Application.Resources>
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<ResourceDictionary>
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<ResourceDictionary.MergedDictionaries>
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<ResourceDictionary Source="Resources/Styles/Colors.xaml" />
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<ResourceDictionary Source="Resources/Styles/Styles.xaml" />
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</ResourceDictionary.MergedDictionaries>
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</ResourceDictionary>
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</Application.Resources>
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</Application>

‎DataLabelTemplate/App.xaml.cs‎

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namespace DataLabelTemplate
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{
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public partial class App : Application
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{
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public App()
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{
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InitializeComponent();
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MainPage = new AppShell();
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}
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}
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}

‎DataLabelTemplate/AppShell.xaml‎

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<?xml version="1.0" encoding="UTF-8" ?>
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<Shell
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x:Class="DataLabelTemplate.AppShell"
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xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
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xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
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xmlns:local="clr-namespace:DataLabelTemplate"
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Shell.FlyoutBehavior="Disabled"
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Title="DataLabelTemplate">
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<ShellContent
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ContentTemplate="{DataTemplate local:MainPage}"
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Route="MainPage" />
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</Shell>

‎DataLabelTemplate/AppShell.xaml.cs‎

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namespace DataLabelTemplate
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{
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public partial class AppShell : Shell
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{
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public AppShell()
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{
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InitializeComponent();
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}
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}
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}

‎DataLabelTemplate/Convertor.cs‎

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using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace DataLabelTemplate
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{
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public class ValueToSummaryValueConverter : IValueConverter
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{
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private double sumOfValues = 0;
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public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
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{
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if (value == null || !(value is double))
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return null;
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double numericValue = (double)value;
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sumOfValues += numericValue;
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if (numericValue == 0)
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return sumOfValues;
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else
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return numericValue;
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}
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public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
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{
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throw new NotImplementedException();
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}
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}
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public class ValueToColorConverter : IValueConverter
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{
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public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
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{
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if (value == null || !(value is double))
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return Colors.Transparent;
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double numericValue = (double)value;
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if (numericValue == 0)
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return Color.FromHex("#3333cc");
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else
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return numericValue > 0 ? Color.FromHex("#3bab46") : Color.FromHex("#df3320");
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}
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public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
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{
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throw new NotImplementedException();
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}
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}
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public class ValueToImageConvertor : IValueConverter
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{
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public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
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{
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if (value == null || !(value is double))
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return null;
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double numericValue = (double)value;
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if (numericValue == 0)
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return null;
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else
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return numericValue > 0 ? "up.png" : "down.png";
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}
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public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
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{
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throw new NotImplementedException();
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}
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}
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}

‎DataLabelTemplate/DataLabelTemplate.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFrameworks>net8.0-android;net8.0-ios;net8.0-maccatalyst</TargetFrameworks>
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<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net8.0-windows10.0.19041.0</TargetFrameworks>
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<!-- Uncomment to also build the tizen app. You will need to install tizen by following this: https://github.com/Samsung/Tizen.NET -->
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<!-- <TargetFrameworks>$(TargetFrameworks);net8.0-tizen</TargetFrameworks> -->
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<!-- Note for MacCatalyst:
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The default runtime is maccatalyst-x64, except in Release config, in which case the default is maccatalyst-x64;maccatalyst-arm64.
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When specifying both architectures, use the plural <RuntimeIdentifiers> instead of the singular <RuntimeIdentifier>.
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The Mac App Store will NOT accept apps with ONLY maccatalyst-arm64 indicated;
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either BOTH runtimes must be indicated or ONLY macatalyst-x64. -->
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<!-- For example: <RuntimeIdentifiers>maccatalyst-x64;maccatalyst-arm64</RuntimeIdentifiers> -->
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<OutputType>Exe</OutputType>
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<RootNamespace>DataLabelTemplate</RootNamespace>
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<UseMaui>true</UseMaui>
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<SingleProject>true</SingleProject>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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<!-- Display name -->
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<ApplicationTitle>DataLabelTemplate</ApplicationTitle>
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<!-- App Identifier -->
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<ApplicationId>com.companyname.datalabeltemplate</ApplicationId>
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<!-- Versions -->
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<ApplicationDisplayVersion>1.0</ApplicationDisplayVersion>
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<ApplicationVersion>1</ApplicationVersion>
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<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'">11.0</SupportedOSPlatformVersion>
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<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'maccatalyst'">13.1</SupportedOSPlatformVersion>
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<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'">21.0</SupportedOSPlatformVersion>
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<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">10.0.17763.0</SupportedOSPlatformVersion>
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<TargetPlatformMinVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">10.0.17763.0</TargetPlatformMinVersion>
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<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'tizen'">6.5</SupportedOSPlatformVersion>
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</PropertyGroup>
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<ItemGroup>
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<!-- App Icon -->
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<MauiIcon Include="Resources\AppIcon\appicon.svg" ForegroundFile="Resources\AppIcon\appiconfg.svg" Color="#512BD4" />
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<!-- Splash Screen -->
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<MauiSplashScreen Include="Resources\Splash\splash.svg" Color="#512BD4" BaseSize="128,128" />
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<!-- Images -->
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<MauiImage Include="Resources\Images\*" />
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<MauiImage Update="Resources\Images\dotnet_bot.png" Resize="True" BaseSize="300,185" />
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<!-- Custom Fonts -->
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<MauiFont Include="Resources\Fonts\*" />
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<!-- Raw Assets (also remove the "Resources\Raw" prefix) -->
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<MauiAsset Include="Resources\Raw\**" LogicalName="%(RecursiveDir)%(Filename)%(Extension)" />
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</ItemGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.Maui.Controls" Version="$(MauiVersion)" />
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<PackageReference Include="Microsoft.Maui.Controls.Compatibility" Version="$(MauiVersion)" />
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<PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="8.0.0" />
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<PackageReference Include="Syncfusion.Maui.Toolkit" Version="*" />
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</ItemGroup>
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</Project>

‎DataLabelTemplate/DataLabelTemplate.csproj.user‎

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<?xml version="1.0" encoding="utf-8"?>
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<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<PropertyGroup>
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<IsFirstTimeProjectOpen>False</IsFirstTimeProjectOpen>
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<ActiveDebugFramework>net8.0-windows10.0.19041.0</ActiveDebugFramework>
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<ActiveDebugProfile>Windows Machine</ActiveDebugProfile>
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</PropertyGroup>
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<ItemGroup>
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<None Update="App.xaml">
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<SubType>Designer</SubType>
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</None>
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<None Update="AppShell.xaml">
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<SubType>Designer</SubType>
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</None>
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<None Update="MainPage.xaml">
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<SubType>Designer</SubType>
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</None>
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<None Update="Platforms\Windows\App.xaml">
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<SubType>Designer</SubType>
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</None>
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<None Update="Platforms\Windows\Package.appxmanifest">
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<SubType>Designer</SubType>
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</None>
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<None Update="Resources\Styles\Colors.xaml">
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<SubType>Designer</SubType>
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</None>
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<None Update="Resources\Styles\Styles.xaml">
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<SubType>Designer</SubType>
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</None>
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</ItemGroup>
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</Project>

‎DataLabelTemplate/DataLabelTemplate.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 17
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VisualStudioVersion = 17.9.34622.214
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DataLabelTemplate", "DataLabelTemplate.csproj", "{13A2C44B-3AC6-45CE-9F0B-1D17070557D0}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{13A2C44B-3AC6-45CE-9F0B-1D17070557D0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{13A2C44B-3AC6-45CE-9F0B-1D17070557D0}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{13A2C44B-3AC6-45CE-9F0B-1D17070557D0}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
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{13A2C44B-3AC6-45CE-9F0B-1D17070557D0}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{13A2C44B-3AC6-45CE-9F0B-1D17070557D0}.Release|Any CPU.Build.0 = Release|Any CPU
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{13A2C44B-3AC6-45CE-9F0B-1D17070557D0}.Release|Any CPU.Deploy.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {9D8766D1-6381-4336-BAA0-023A3227E2B8}
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EndGlobalSection
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EndGlobal

‎DataLabelTemplate/MainPage.xaml‎

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<?xml version="1.0" encoding="utf-8" ?>
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<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
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xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
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x:Class="DataLabelTemplate.MainPage"
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xmlns:chart="clr-namespace:Syncfusion.Maui.Toolkit.Charts;assembly=Syncfusion.Maui.Toolkit"
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xmlns:local="clr-namespace:DataLabelTemplate">
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<ContentPage.BindingContext>
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<local:ChartViewModel x:Name="ViewModel"></local:ChartViewModel>
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</ContentPage.BindingContext>
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<ContentPage.Resources>
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<ResourceDictionary>
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<local:ValueToSummaryValueConverter x:Key="ValueToValueConverter"/>
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<local:ValueToColorConverter x:Key="ValueToColorConverter"/>
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<local:ValueToImageConvertor x:Key="ValueToImageConverter"></local:ValueToImageConvertor>
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<DataTemplate x:Key="dataLabel">
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<StackLayout Orientation="Horizontal" Spacing="3">
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<Label FontSize="14" FontAttributes="Bold">
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<Label.Text>
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<Binding Path="Item.Value" Converter="{StaticResource ValueToValueConverter}" StringFormat="{}$.{0}"/>
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</Label.Text>
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<Label.TextColor>
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<Binding Path="Item.Value" Converter="{StaticResource ValueToColorConverter}"/>
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</Label.TextColor>
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</Label>
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<Image Source="{Binding Item.Value,Converter={StaticResource ValueToImageConverter}}" HeightRequest="15" WidthRequest="15"></Image>
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</StackLayout>
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</DataTemplate>
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</ResourceDictionary>
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</ContentPage.Resources>
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<chart:SfCartesianChart >
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<chart:SfCartesianChart.XAxes>
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<chart:CategoryAxis></chart:CategoryAxis>
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</chart:SfCartesianChart.XAxes>
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<chart:SfCartesianChart.YAxes>
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<chart:NumericalAxis Minimum="0" Maximum="20000" Interval="4000"></chart:NumericalAxis>
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</chart:SfCartesianChart.YAxes>
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<chart:WaterfallSeries ItemsSource="{Binding Data}"
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XBindingPath="Department"
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YBindingPath="Value"
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Fill="#3bab46"
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NegativePointsBrush="#df3320"
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ShowDataLabels="True"
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LabelTemplate="{StaticResource dataLabel}"
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SummaryBindingPath="IsSummary"
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SummaryPointsBrush="#3333cc">
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<chart:WaterfallSeries.DataLabelSettings>
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<chart:CartesianDataLabelSettings LabelPlacement="Outer" UseSeriesPalette="False"></chart:CartesianDataLabelSettings>
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</chart:WaterfallSeries.DataLabelSettings>
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</chart:WaterfallSeries>
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</chart:SfCartesianChart>
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</ContentPage>

‎DataLabelTemplate/MainPage.xaml.cs‎

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namespace DataLabelTemplate
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{
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public partial class MainPage : ContentPage
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{
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public MainPage()
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{
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InitializeComponent();
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}
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}
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}

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