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Saravanan-MadheshSaravanan-Madhesh
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Merge pull request #1 from SyncfusionExamples/876723-How-to-highlight-selected-data-points-by-using-GetDataPoints-method-in-.NET-MAUI-Cartesian-Charts
876723-How to highlight selected data points by using GetDataPoints method in .NET MAUI Cartesian Charts sample.
2 parents 337703a + 4591fb8 commit a81c297

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‎GetDataPointsSample/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:GetDataPointsSample"
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x:Class="GetDataPointsSample.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>

‎GetDataPointsSample/App.xaml.cs‎

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namespace GetDataPointsSample
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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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}

‎GetDataPointsSample/AppShell.xaml‎

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<?xml version="1.0" encoding="UTF-8" ?>
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<Shell
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x:Class="GetDataPointsSample.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:GetDataPointsSample"
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Shell.FlyoutBehavior="Disabled"
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Title="GetDataPointsSample">
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<ShellContent
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Title="Home"
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ContentTemplate="{DataTemplate local:MainPage}"
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Route="MainPage" />
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</Shell>

‎GetDataPointsSample/AppShell.xaml.cs‎

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namespace GetDataPointsSample
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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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}

‎GetDataPointsSample/GetDataPointsSample.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>GetDataPointsSample</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>GetDataPointsSample</ApplicationTitle>
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<!-- App Identifier -->
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<ApplicationId>com.companyname.getdatapointssample</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.Charts" Version="*" />
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</ItemGroup>
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</Project>

‎GetDataPointsSample/GetDataPointsSample.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 = 17.10.34916.146
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "GetDataPointsSample", "GetDataPointsSample.csproj", "{E8A64D9C-3538-4373-8A5A-6774CCE99BBF}"
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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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Release-Xml|Any CPU = Release-Xml|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{E8A64D9C-3538-4373-8A5A-6774CCE99BBF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{E8A64D9C-3538-4373-8A5A-6774CCE99BBF}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{E8A64D9C-3538-4373-8A5A-6774CCE99BBF}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
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{E8A64D9C-3538-4373-8A5A-6774CCE99BBF}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{E8A64D9C-3538-4373-8A5A-6774CCE99BBF}.Release|Any CPU.Build.0 = Release|Any CPU
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{E8A64D9C-3538-4373-8A5A-6774CCE99BBF}.Release|Any CPU.Deploy.0 = Release|Any CPU
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{E8A64D9C-3538-4373-8A5A-6774CCE99BBF}.Release-Xml|Any CPU.ActiveCfg = Release|Any CPU
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{E8A64D9C-3538-4373-8A5A-6774CCE99BBF}.Release-Xml|Any CPU.Build.0 = Release|Any CPU
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{E8A64D9C-3538-4373-8A5A-6774CCE99BBF}.Release-Xml|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 = {3A2345C4-16E1-43EE-9FD0-EADBABFF4736}
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EndGlobalSection
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EndGlobal

‎GetDataPointsSample/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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xmlns:chart="clr-namespace:Syncfusion.Maui.Charts;assembly=Syncfusion.Maui.Charts"
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x:Class="GetDataPointsSample.MainPage"
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xmlns:model="clr-namespace:GetDataPointsSample">
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<ContentPage.BindingContext>
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<model:ScatterSeriesViewModel x:Name="viewModel"/>
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</ContentPage.BindingContext>
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<chart:SfCartesianChart HorizontalOptions="Fill" VerticalOptions="Fill" x:Name="Chart">
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<chart:SfCartesianChart.PlotAreaBackgroundView>
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<GraphicsView Drawable="{x:Reference InteractionExt}" x:Name="graphicsView" InputTransparent="True" ZIndex="1"/>
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</chart:SfCartesianChart.PlotAreaBackgroundView>
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<chart:SfCartesianChart.InteractiveBehavior>
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<model:ChartInteractionExt x:Name="InteractionExt" Graphics="{x:Reference graphicsView}"/>
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</chart:SfCartesianChart.InteractiveBehavior>
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<chart:SfCartesianChart.XAxes>
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<chart:NumericalAxis Minimum="100" Maximum="220" Interval="20"/>
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</chart:SfCartesianChart.XAxes>
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<chart:SfCartesianChart.YAxes>
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<chart:NumericalAxis Minimum="50" Maximum="80" Interval="5"/>
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</chart:SfCartesianChart.YAxes>
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<chart:SfCartesianChart.Series>
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<chart:ScatterSeries ItemsSource="{Binding Data}" XBindingPath="XValue" YBindingPath="YValue" PointWidth="8" Opacity="0.8" Fill="#FE7A36" PointHeight="8" >
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<chart:ScatterSeries.SelectionBehavior>
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<chart:DataPointSelectionBehavior Type="Multiple" SelectionBrush="#3652AD"/>
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</chart:ScatterSeries.SelectionBehavior>
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</chart:ScatterSeries>
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</chart:SfCartesianChart.Series>
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</chart:SfCartesianChart>
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</ContentPage>

‎GetDataPointsSample/MainPage.xaml.cs‎

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using Syncfusion.Maui.Charts;
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using System.ComponentModel;
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namespace GetDataPointsSample
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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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public class ChartInteractionExt : ChartInteractiveBehavior, IDrawable, INotifyPropertyChanged
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{
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float startX;
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float startY;
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float endX;
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float endY;
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bool showRect = false;
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public GraphicsView Graphics { get; set; }
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public void Draw(ICanvas canvas, RectF dirtyRect)
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{
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canvas.StrokeColor = Colors.Black;
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canvas.StrokeSize = 2;
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canvas.DrawRectangle(startX, startY, endX, endY);
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}
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protected override void OnTouchDown(ChartBase chart, float pointX, float pointY)
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{
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endY = 0; endX = 0;
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showRect = true;
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var seriesBounds = chart.SeriesBounds;
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startX = (float)(pointX - seriesBounds.Left);
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startY = (float)(pointY - seriesBounds.Top);
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}
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protected override void OnTouchUp(ChartBase chart, float pointX, float pointY)
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{
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if (chart is SfCartesianChart cartesianChart)
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{
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var viewModel = chart.BindingContext as ScatterSeriesViewModel;
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var rect = new Rect(startX, startY, endX, endY);
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var selectedIndexes = new List<int>();
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foreach (var series in cartesianChart.Series)
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{
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if (series is ScatterSeries scatterSeries)
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{
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var dataPoints = scatterSeries.GetDataPoints(rect);
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if (dataPoints != null && viewModel != null)
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{
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for (int i = 0; i < viewModel.Data.Count; i++)
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{
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if (dataPoints.Contains(viewModel.Data[i]))
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selectedIndexes.Add(i);
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}
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scatterSeries.SelectionBehavior.SelectedIndexes = selectedIndexes;
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}
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}
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}
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}
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showRect = false;
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Graphics.Invalidate();
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}
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protected override void OnTouchMove(ChartBase chart, float pointX, float pointY)
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{
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var seriesBounds = chart.SeriesBounds;
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if (showRect)
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{
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float width = (float)(pointX - startX - seriesBounds.Left);
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float height = (float)(pointY - startY - seriesBounds.Top);
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endX = width;
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endY = height;
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}
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Graphics.Invalidate();
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}
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}
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}

‎GetDataPointsSample/MauiProgram.cs‎

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using Microsoft.Extensions.Logging;
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using Syncfusion.Maui.Core.Hosting;
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namespace GetDataPointsSample
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{
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public static class MauiProgram
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{
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public static MauiApp CreateMauiApp()
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{
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var builder = MauiApp.CreateBuilder();
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builder
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.UseMauiApp<App>()
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.ConfigureSyncfusionCore()
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.ConfigureFonts(fonts =>
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{
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fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
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fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
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});
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#if DEBUG
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builder.Logging.AddDebug();
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#endif
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return builder.Build();
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}
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}
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}

‎GetDataPointsSample/Model/Model.cs‎

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using System;
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using System.Collections.Generic;
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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 GetDataPointsSample
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{
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public class ChartDataModel
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{
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public double XValue { get; set; }
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public double YValue { get; set; }
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public ChartDataModel() { }
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public ChartDataModel(double xValue, double yValue)
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{
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XValue = xValue;
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YValue = yValue;
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}
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}
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}

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