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IAnchorInfo Interface

  • Reference

Definition

Namespace:
System.Windows.Annotations
Assembly:
PresentationFramework.dll

Provides the capabilities for matching annotations with the corresponding annotated objects.

public interface class IAnchorInfo
public interface IAnchorInfo
type IAnchorInfo = interface
Public Interface IAnchorInfo

Examples

Consider a simple document reader application that has a comments pane. The comments pane might be a list box that displays the text from a list of annotations that are anchored to a document. If the user selects an item in the list box, then the application brings into view the paragraph in the document that the corresponding annotation object is anchored to.

The following example demonstrates how to implement the event handler of such a list box that serves as the comments pane:

void annotationsListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{

    Annotation comment = (sender as ListBox).SelectedItem as Annotation;
    if (comment != null)
    {
        // IAnchorInfo info;
        // service is an AnnotationService object
        // comment is an Annotation object
        info = AnnotationHelper.GetAnchorInfo(this.service, comment);
        TextAnchor resolvedAnchor = info.ResolvedAnchor as TextAnchor;
        TextPointer textPointer = (TextPointer)resolvedAnchor.BoundingStart;
        textPointer.Paragraph.BringIntoView();
    }
}

Private Sub annotationsListBox_SelectionChanged(ByVal sender As Object, ByVal e As SelectionChangedEventArgs)

    Dim comment As Annotation = TryCast((TryCast(sender, ListBox)).SelectedItem, Annotation)
    If comment IsNot Nothing Then
        ' service is an AnnotationService object
        ' comment is an Annotation object
        info = AnnotationHelper.GetAnchorInfo(Me.service, comment)
        Dim resolvedAnchor As TextAnchor = TryCast(info.ResolvedAnchor, TextAnchor)
        Dim textPointer As TextPointer = CType(resolvedAnchor.BoundingStart, TextPointer)
        textPointer.Paragraph.BringIntoView()
    End If
End Sub

Properties

Anchor

Gets the anchor of the annotation.
Annotation

Gets the annotation object.
ResolvedAnchor

Gets the object that represents the location on the tree where the Anchor is resolved.

Applies to

See also