VintaSoft PDF .NET Plug-in Discussions

// ...
// subscribe to the AnnotationTool.BuildingFinished event
_annotationTool.BuildingFinished += AnnotationTool_BuildingFinished;
// ...


/// <summary>
/// The annotation building is finished.
/// </summary>
private void AnnotationTool_BuildingFinished(object sender, PdfAnnotationViewEventArgs e)
{
    // get annotation view for newly created annotation
    PdfFreeTextAnnotationView textView = e.AnnotationView as PdfFreeTextAnnotationView;
    // if newly created annotation is PDF free text annotation
    if (textView != null)
    {
        // find text box transformer
        TextObjectTextBoxTransformer textBoxTransformer = CompositeInteractionController.FindInteractionController<TextObjectTextBoxTransformer>(textView.Transformer);
        // if text box transformer is found
        if (textBoxTransformer != null)
        {
            // get annotation tool
            PdfAnnotationTool annotationTool = (PdfAnnotationTool)sender;

            // show text box
            textBoxTransformer.ShowTextBox(annotationTool.ImageViewer, textView.GetBoundingBox().Location);
        }
    }
}