TreeView.HotTracking TreeView.HotTracking TreeView.HotTracking TreeView.HotTracking Property

Definición

Obtiene o establece un valor que indica si la etiqueta de un nodo de árbol toma la apariencia de un hipervínculo cuando el puntero del mouse pasa por encima.Gets or sets a value indicating whether a tree node label takes on the appearance of a hyperlink as the mouse pointer passes over it.

public:
 property bool HotTracking { bool get(); void set(bool value); };
public bool HotTracking { get; set; }
member this.HotTracking : bool with get, set
Public Property HotTracking As Boolean

Valor de propiedad

Es true si la etiqueta de un nodo de árbol toma la apariencia de un hipervínculo cuando el puntero del mouse pasa por encima; en caso contrario, es false.true if a tree node label takes on the appearance of a hyperlink as the mouse pointer passes over it; otherwise, false. De manera predeterminada, es false.The default is false.

Ejemplos

En el ejemplo de código siguiente se ilustra una personalizada TreeView.The following code example illustrates a customized TreeView. Al heredar el TreeView (clase), esta versión personalizada tiene toda la funcionalidad de una típica TreeView.By inheriting the TreeView class, this custom version has all the functionality of a typical TreeView. Cambiar varios valores de propiedad en el constructor, proporciona una apariencia única.Changing various property values in the constructor provides a unique appearance. Dado que el ShowPlusMinus propiedad está establecida en false, el control personalizado también reemplaza el OnAfterSelect método para que los nodos se pueden expandir y contraer cuando se hace clic en.Because the ShowPlusMinus property is set to false, the customized control also overrides the OnAfterSelect method so that nodes can be expanded and collapsed when they are clicked.

Un control personalizado de esta manera puede usarse en toda la organización, facilitando el proceso proporcionar una interfaz coherente sin necesidad de las propiedades del control que se especifique en cada proyecto individual.A control that is customized in this way can be used throughout an organization, making it easy to provide a consistent interface without requiring the control properties to be specified in each individual project.

public ref class CustomizedTreeView: public TreeView
{
public:
   CustomizedTreeView()
   {

      // Customize the TreeView control by setting various properties.
      BackColor = System::Drawing::Color::CadetBlue;
      FullRowSelect = true;
      HotTracking = true;
      Indent = 34;
      ShowPlusMinus = false;

      // The ShowLines property must be false for the FullRowSelect
      // property to work.
      ShowLines = false;
   }

protected:
   virtual void OnAfterSelect( TreeViewEventArgs^ e ) override
   {
      // Confirm that the user initiated the selection.
      // This prevents the first node from expanding when it is
      // automatically selected during the initialization of
      // the TreeView control.
      if ( e->Action != TreeViewAction::Unknown )
      {
         if ( e->Node->IsExpanded )
         {
            e->Node->Collapse();
         }
         else
         {
            e->Node->Expand();
         }
      }

      
      // Remove the selection. This allows the same node to be
      // clicked twice in succession to toggle the expansion state.
      SelectedNode = nullptr;
   }
};
public class CustomizedTreeView : TreeView
{
    public CustomizedTreeView()
    {
        // Customize the TreeView control by setting various properties.
        BackColor = System.Drawing.Color.CadetBlue;
        FullRowSelect = true;
        HotTracking = true;
        Indent = 34;
        ShowPlusMinus = false;

        // The ShowLines property must be false for the FullRowSelect 
        // property to work.
        ShowLines = false;
    }

    protected override void OnAfterSelect(TreeViewEventArgs e)
    {
        // Confirm that the user initiated the selection.
        // This prevents the first node from expanding when it is
        // automatically selected during the initialization of 
        // the TreeView control.
        if (e.Action != TreeViewAction.Unknown)
        {
            if (e.Node.IsExpanded) 
            {
                e.Node.Collapse();
            }
            else 
            {
                e.Node.Expand();
            }
        }

        // Remove the selection. This allows the same node to be
        // clicked twice in succession to toggle the expansion state.
        SelectedNode = null;
    }

}
Public Class CustomizedTreeView
    Inherits TreeView

    Public Sub New()
        ' Customize the TreeView control by setting various properties.
        BackColor = System.Drawing.Color.CadetBlue
        FullRowSelect = True
        HotTracking = True
        Indent = 34
        ShowPlusMinus = False

        ' The ShowLines property must be false for the FullRowSelect 
        ' property to work.
        ShowLines = False
    End Sub 'New


    Protected Overrides Sub OnAfterSelect(ByVal e As TreeViewEventArgs)
        ' Confirm that the user initiated the selection.
        ' This prevents the first node from expanding when it is
        ' automatically selected during the initialization of 
        ' the TreeView control.
        If e.Action <> TreeViewAction.Unknown Then
            If e.Node.IsExpanded Then
                e.Node.Collapse()
            Else
                e.Node.Expand()
            End If
        End If

        ' Remove the selection. This allows the same node to be
        ' clicked twice in succession to toggle the expansion state.
        SelectedNode = Nothing
    End Sub 'OnAfterSelect

End Class 'CustomizedTreeView 

Comentarios

Si el CheckBoxes propiedad está establecida en true, el HotTracking propiedad no tiene ningún efecto.If the CheckBoxes property is set to true, the HotTracking property has no effect.

Nota

Cuando el HotTracking propiedad está establecida en true, cada árbol nodo etiqueta toma la apariencia de un hipervínculo cuando el puntero del mouse pasa sobre él.When the HotTracking property is set to true, each tree node label takes on the appearance of a hyperlink as the mouse pointer passes over it. El Underline estilo de fuente se aplica a la Font y ForeColor se establece en azul para que la etiqueta aparezca como un vínculo.The Underline font style is applied to the Font and the ForeColor is set to blue to make the label appear as a link. El aspecto no se controla mediante la configuración de Internet de sistema operativo del usuario.The appearance is not controlled by the Internet settings of the user's operating system.

Se aplica a