Class SymbolFilterProvider

Represents a collection of Filters in Stencil.

Inheritance

System.Object

SymbolFilterProvider

Implements

System.ComponentModel.INotifyPropertyChanged

Namespace: Syncfusion.UI.Xaml.Diagram.Stencil

Assembly: Syncfusion.SfDiagram.WPF.dll

Syntax

public class SymbolFilterProvider : Object, INotifyPropertyChanged

Constructors

SymbolFilterProvider()

Declaration

public SymbolFilterProvider()

Properties

Command

Gets the Checked command to invoke when click the filter in the more shapes menu item.

Declaration

public ICommand Command { get; }

Property Value

Type
System.Windows.Input.ICommand

Content

Gets or sets a content of symbol filter.

Declaration

public object Content { get; set; }

Property Value

Type
System.Object

ContentTemplate

Gets or sets the data template used to display the content of the ContentControl.

Declaration

public DataTemplate ContentTemplate { get; set; }

Property Value

Type
System.Windows.DataTemplate

IsChecked

Gets or sets a value that indicates whether this symbol filter should be added to the SymbolGroupHeader list when the SymbolGroupDisplayMode is List. The default value is set to false.

Declaration

public bool IsChecked { get; set; }

Property Value

Type
System.Boolean

Examples

Below example shows how to add the symbol filter to the SymbolGroupHeader list. #MainWindow.xaml

<Window.DataContext>
<local:StencilVM></local:StencilVM>
</Window.DataContext>
 <syncfusion:Stencil x:Name="stencil" Width="250"  Title="Stencil Shapes" SymbolGroupDisplayMode="List"  SymbolFilters="{Binding Symbolfilters}" SelectedFilter="{Binding Selectedfilter}">
     <!--Initialize the SymbolSource-->
      <syncfusion:Stencil.SymbolSource>               
       <!--Define the SymbolCollection-->
               <syncfusion:SymbolCollection>
                 <syncfusion:NodeViewModel Key = "Basic Shapes" Name="Triangle" OffsetX="100" OffsetY="100" UnitHeight="100" UnitWidth="100"  Shape="{StaticResource Triangle}" ShapeStyle="{StaticResource nodestyle}" >
                </syncfusion:NodeViewModel>
                </syncfusion:SymbolCollection>
            </syncfusion:Stencil.SymbolSource>
        <syncfusion:Stencil.SymbolGroups>
            <syncfusion:SymbolGroups>
                <!--Separate groups based on the key-->
           <syncfusion:SymbolGroupProvider MappingName = "Key" />
          </ syncfusion:SymbolGroups>
        </syncfusion:Stencil.SymbolGroups>
      </syncfusion:Stencil>

#ViewModel.cs

public class StencilVM : INotifyPropertyChanged
{
   public StencilVM()
   {
       Symbolfilters = new SymbolFilters();
       SymbolFilterProvider node1 = new SymbolFilterProvider { Content = "Basic Shapes",IsChecked=true, SymbolFilter = Filter };
       this.Symbolfilters.Add(node1);
       this.Selectedfilter = Symbolfilters[0];
   }
  //Define filtering of Symbols
   private bool Filter(SymbolFilterProvider sender, object symbol)
   {
       if (symbol is NodeViewModel)
       {
           if (sender.Content.ToString() == (symbol as NodeViewModel).Key.ToString())
               return true;
       }
       return false;
   }
   public ObservableCollection<SymbolFilterProvider> Symbolfilters { get; set; }
   public SymbolFilterProvider Selectedfilter { get; set; }
   public event PropertyChangedEventHandler PropertyChanged;
}

---

SymbolFilter

Gets or sets a delegate to represent selected filter in Stencil.

Declaration

public FilterPredicate SymbolFilter { get; set; }

Property Value

Type
FilterPredicate

Methods

OnPropertyChanged(String)

Invoked whenever the effective value of any dependency property on this FrameworkElement has been updated. The specific dependency property that changed is reported in the arguments parameter. Overrides OnPropertyChanged(name).

Declaration

protected virtual void OnPropertyChanged(string name)

Parameters

Type	Name	Description
System.String	name

Events

PropertyChanged

Occurs when a property value changes.

Declaration

public event PropertyChangedEventHandler PropertyChanged

Event Type

Type
System.ComponentModel.PropertyChangedEventHandler

Implements

System.ComponentModel.INotifyPropertyChanged