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Merge pull request #98 from SatishRaj4377/WPF-879597-Restrict_Node_Dragging_From_Group_Sample
WPF-879597-Added Sample of RestrictNodeDraggingFromGroup
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‎Samples/Group/Restrict Node Dragging In Group/README.md

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# Restrict Node Dragging in Group
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This repository contains sample which shows how to restict node being dragged from group in SfDiagram.
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__*Documentation*__: https://help.syncfusion.com/wpf/diagram/group
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## Project pre-requisites
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To run this application, you need to have the below two in your system
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* [Visual Studio 2019](https://www.visualstudio.com/wpf-vs)
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* [Syncfusion.SfDiagram.WPF](https://www.nuget.org/packages/Syncfusion.SfDiagram.WPF/) nuget package. To install the package using NuGet Package Manager, refer this [link](https://docs.microsoft.com/en-us/nuget/quickstart/install-and-use-a-package-in-visual-studio#nuget-package-manager).
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## Deploying and running the sample
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* To debug the sample and then run it, press F5 or select Debug > Start Debugging. To run the sample without debugging, press Ctrl+F5 or selectDebug > Start Without Debugging.

‎Samples/Group/Restrict Node Dragging In Group/RestrictChildDraggingInGroup/App.config

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<?xml version="1.0" encoding="utf-8" ?>
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<configuration>
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<startup>
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<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.2" />
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</startup>
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</configuration>

‎Samples/Group/Restrict Node Dragging In Group/RestrictChildDraggingInGroup/App.xaml

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<Application x:Class="RestrictChildDraggingInGroup.App"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:local="clr-namespace:RestrictChildDraggingInGroup"
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StartupUri="MainWindow.xaml">
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<Application.Resources>
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</Application.Resources>
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</Application>

‎Samples/Group/Restrict Node Dragging In Group/RestrictChildDraggingInGroup/App.xaml.cs

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using System;
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using System.Collections.Generic;
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using System.Configuration;
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using System.Data;
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using System.Linq;
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using System.Threading.Tasks;
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using System.Windows;
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namespace RestrictChildDraggingInGroup
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{
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/// <summary>
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/// Interaction logic for App.xaml
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/// </summary>
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public partial class App : Application
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{
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}
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}

‎Samples/Group/Restrict Node Dragging In Group/RestrictChildDraggingInGroup/MainWindow.xaml

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<Window xmlns:syncfusion="http://schemas.syncfusion.com/wpf" x:Class="RestrictChildDraggingInGroup.MainWindow"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
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xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
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xmlns:local="clr-namespace:RestrictChildDraggingInGroup"
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mc:Ignorable="d"
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Title="MainWindow" Height="450" Width="800" WindowState="Maximized">
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<Window.Resources>
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<Style x:Key="parentStyle" TargetType="Path">
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<Setter Property="Fill" Value="DodgerBlue"/>
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<Setter Property="Stretch" Value="Fill"/>
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</Style>
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<Style x:Key="childStyle" TargetType="Path">
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<Setter Property="Fill" Value="Blue"/>
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<Setter Property="Stretch" Value="Fill"/>
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</Style>
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</Window.Resources>
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<Grid>
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<local:CustomDiagram x:Name="Diagram"/>
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</Grid>
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</Window>

‎Samples/Group/Restrict Node Dragging In Group/RestrictChildDraggingInGroup/MainWindow.xaml.cs

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using Syncfusion.UI.Xaml.Diagram;
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using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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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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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Data;
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using System.Windows.Documents;
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using System.Windows.Input;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using System.Windows.Navigation;
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using System.Windows.Shapes;
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namespace RestrictChildDraggingInGroup
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{
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/// <summary>
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/// Interaction logic for MainWindow.xaml
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/// </summary>
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public partial class MainWindow : Window
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{
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public MainWindow()
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{
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InitializeComponent();
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NodeViewModel parentNode = new NodeViewModel()
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{
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UnitWidth = 300,
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UnitHeight = 300,
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OffsetX = 660,
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OffsetY = 400,
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Annotations = new AnnotationCollection()
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{
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new AnnotationEditorViewModel()
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{
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Content = "Parent Node",
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Foreground = new SolidColorBrush(Colors.White),
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}
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},
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Shape = new RectangleGeometry() { Rect = new Rect(0, 0, 10, 10) },
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ShapeStyle = this.Resources["parentStyle"] as Style
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};
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NodeViewModel childNode = new NodeViewModel()
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{
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UnitWidth = 100,
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UnitHeight = 100,
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OffsetX = 660,
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OffsetY = 330,
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Annotations = new AnnotationCollection()
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{
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new AnnotationEditorViewModel()
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{
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Content = "Child Node",
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Foreground = new SolidColorBrush(Colors.White),
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}
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},
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Shape = new RectangleGeometry() { Rect = new Rect(0, 0, 10, 10) },
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ShapeStyle = this.Resources["childStyle"] as Style
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};
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ObservableCollection<GroupViewModel> groups = new ObservableCollection<GroupViewModel>();
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GroupViewModel group = new GroupViewModel()
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{
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OffsetX = 900,
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Nodes = new ObservableCollection<NodeViewModel>()
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{
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parentNode,
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childNode
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},
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};
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groups.Add(group);
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Diagram.Groups = groups;
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}
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}
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public class CustomDiagram : SfDiagram
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{
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//Method to return the selector for diagram
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protected override Selector GetSelectorForItemOverride(object item)
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{
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//Assigning custom selector to the diagram
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CustomSelector selector = new CustomSelector();
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return selector;
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}
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}
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public class CustomSelector : Selector
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{
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//Method to decide whether the Selection should be done in PointerDown.
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protected override void PointerSelection(PointerSelectionArgs args)
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{
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if (args.PointerMode == PointerMode.Down)
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{
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//Check whether if we select the Node or not
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if (args.Source is NodeViewModel)
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{
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NodeViewModel node = args.Source as NodeViewModel;
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//Check whether the parent group of the parent is null or not
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if (node.ParentGroup != null)
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{
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//Ensure the IsSelected Property of the Parent Group of the Node.
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if ((node.ParentGroup as GroupViewModel).IsSelected)
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{
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//Clear the Selection if we select the group
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ClearSelection(Element: args.Source);
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}
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else
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{
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Selection(element: args.Source);
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}
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}
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else
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{
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Selection(element: args.Source);
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}
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}
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else if (args.Source is ConnectorViewModel)
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{
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Selection(element: args.Source);
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}
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else if (args.Source is SfDiagram)
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{
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//Clear the selelction if we select the diagram
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ClearSelection(Element: args.Source);
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}
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}
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}
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}
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}

‎Samples/Group/Restrict Node Dragging In Group/RestrictChildDraggingInGroup/Properties/AssemblyInfo.cs

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using System.Reflection;
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using System.Resources;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using System.Windows;
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// General Information about an assembly is controlled through the following
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// set of attributes. Change these attribute values to modify the information
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// associated with an assembly.
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[assembly: AssemblyTitle("RestrictChildDraggingInGroup")]
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[assembly: AssemblyDescription("")]
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[assembly: AssemblyConfiguration("")]
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[assembly: AssemblyCompany("")]
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[assembly: AssemblyProduct("RestrictChildDraggingInGroup")]
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[assembly: AssemblyCopyright("Copyright © 2025")]
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[assembly: AssemblyTrademark("")]
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[assembly: AssemblyCulture("")]
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// Setting ComVisible to false makes the types in this assembly not visible
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// to COM components. If you need to access a type in this assembly from
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// COM, set the ComVisible attribute to true on that type.
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[assembly: ComVisible(false)]
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//In order to begin building localizable applications, set
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//<UICulture>CultureYouAreCodingWith</UICulture> in your .csproj file
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//inside a <PropertyGroup>. For example, if you are using US english
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//in your source files, set the <UICulture> to en-US. Then uncomment
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//the NeutralResourceLanguage attribute below. Update the "en-US" in
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//the line below to match the UICulture setting in the project file.
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//[assembly: NeutralResourcesLanguage("en-US", UltimateResourceFallbackLocation.Satellite)]
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[assembly:ThemeInfo(
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ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
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//(used if a resource is not found in the page,
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// or application resource dictionaries)
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ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
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//(used if a resource is not found in the page,
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// app, or any theme specific resource dictionaries)
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)]
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// Version information for an assembly consists of the following four values:
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//
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// Major Version
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// Minor Version
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// Build Number
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// Revision
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//
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[assembly: AssemblyVersion("1.0.0.0")]
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[assembly: AssemblyFileVersion("1.0.0.0")]

‎Samples/Group/Restrict Node Dragging In Group/RestrictChildDraggingInGroup/Properties/Resources.Designer.cs

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