How to add double click event to a vertex

[KamilStachera]

How to add double click event to a vertex (with Dragging set on)

[faint069]

Hello! Recently I've solved similar problem. I used Devexpress EventToCommand to do this, but I think You can use another binding here.
Here is my XAML code:

 <Style TargetType="{ x:Type controls:VertexControl }">
    ...
    <--<Different setters here/>-->
    ...
    <Setter Property="Template">
      <Setter.Value>
        <ControlTemplate TargetType="{ x:Type controls:VertexControl }">
            <Grid>
            <dxmvvm:Interaction.Behaviors>
              <dxmvvm:EventToCommand EventName="MouseDown" 
                                     Command="{ Binding SelectCmd}" 
                                     PassEventArgsToCommand="True"
                                     EventArgsConverter="{ StaticResource MouseEventArgsToBoolIsDoubleClick }" />
            </dxmvvm:Interaction.Behaviors>
          ...
         <--Other elements in grid-->
      </Grid>

And here is args converter. It only returns was double click performed or not.

public class MouseEventArgsToBoolIsDoubleClick:IEventArgsConverter 
	{
		public object Convert( object sender, object args )
		{
			if ( args is MouseButtonEventArgs mouseArgs )
			{
				return mouseArgs.ClickCount == 2;
			}

			return false;
		}

In my DataVertex I have command to process doubleclick:

      public ICommand SelectCmd { get; set; }
      //In Constructor:
      SelectCmd = ReactiveCommand.Create<bool>( Select );
    //And Method to be assosiated with command.
    private void Select( bool isDoubleClick )
    {
      if ( isDoubleClick )
      {
        IsSelected = !IsSelected;
      }
    }

Of course You can do all of this simplier, without all this commands and converters.

[bleibold]

// Assume you have a ZoomControl defined in XAML similar to below:

                  <graphx:ZoomControl x:Name="ErgZoomctrl" Margin="5,0,5,0" Grid.Row="1" Grid.Column="0" 
                                   Grid.ColumnSpan="2" 
                         ViewFinderVisibility="{Binding ViewFinderVisibility}" Background="WhiteSmoke">
                         <models:GraphAreaEx x:Name="ErgArea"/>
                     </graphx:ZoomControl>

// Subscribe to the Event handler.
ErgArea.VertexDoubleClick += ErgArea_OnVertexDoubleClick;

// This event handler is only needed if you need to expose this event for subscribing externally from a UserControl.
public event VertexSelectedEventHandler VertexDoubleClick;

// Add the Event Handler. I use this as another custom User Control so I expose this event to the outside world. You can choose to just respond to the mouse double-click event here as an alternative.

    internal virtual void OnVertexDoubleClick(VertexControl vc, MouseButtonEventArgs e)
    {
      VertexSelectedEventHandler vertexDoubleClick = this.VertexDoubleClick;
      if (vertexDoubleClick == null)
        return;

    //  This handler init is optional.
      vertexDoubleClick((object) this, new VertexSelectedEventArgs(vc, (MouseEventArgs) e, Keyboard.Modifiers));
    }

subscribe to the VertexDoubleClick Event Handler