883478 How to change cursor and add tool-tip when mouse over the uri annotation in PdfViewer

Author: KrithikaGanesan

Annotations/Uri Annotation/UriAnnotation/MainWindow.xaml.cs

@@ -1,23 +1,12 @@
 using Syncfusion.Pdf.Graphics;
 using Syncfusion.Pdf.Interactive;
 using Syncfusion.Pdf.Parsing;
-using System;
-using System.Collections.Generic;
 using System.Drawing;
 using System.IO;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
-using System.Windows.Data;
-using System.Windows.Documents;
 using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
 
 namespace UriAnnotation
 {
@@ -44,36 +33,41 @@ private void BtnLoad_Click(object sender, RoutedEventArgs e)
 
             //Draw the border.
             docView.LoadedDocument.Pages[0].Graphics.DrawRectangle(PdfPens.Red, new RectangleF(10, 10, 30, 30));
-
-
+            
             //Create a new Uri Annotation.
             PdfUriAnnotation uriAnnotation = new PdfUriAnnotation(new RectangleF(10, 10, 30, 30), "http://www.google.com");
             //Set Text to uriAnnotation.
             uriAnnotation.Text = "Uri Annotation";
             //Add this annotation to a new page.
             docView.LoadedDocument.Pages[0].Annotations.Add(uriAnnotation);
-            //Save the document to disk.
+            //Save the document and reload it into viewer.
             MemoryStream stream = new MemoryStream();
             lDoc.Save(stream);
             docView.Load(stream);
+            //Get the annotation page index and bounds. 
             annotationPageIndex = 0;
             annotationBounds = uriAnnotation.Bounds;
-            //annotationBounds = convertor.ConvertToPixels(annotationBounds, PdfGraphicsUnit.Point);
+            //Create the tooltip with content and placement target.
             TextBlock textBlock = new TextBlock();
             textBlock.Text = "Uri Annotation";
             tooltip.PlacementTarget = docView;
             tooltip.Content = textBlock;
+            //Subscribe page mouse move event of WPF PdfViewer.
             docView.PageMouseMove += PdfViewer_PageMouseMove;
         }
 
         private void PdfViewer_PageMouseMove(object sender, Syncfusion.Windows.PdfViewer.PageMouseMoveEventArgs args)
         {
+            //Ensure the annotation bounds are not empty.
             if (annotationBounds != RectangleF.Empty)
             {
+                //Convert the position from pixels to point values.
                 float x = convertor.ConvertFromPixels((float)args.Position.X, PdfGraphicsUnit.Point);
                 float y = convertor.ConvertFromPixels((float)args.Position.Y, PdfGraphicsUnit.Point);
+                //Ensure the retrieved page index matches the annotation page index, and then compare the converted position value with the annotation bounds.
                 if (args.PageIndex == annotationPageIndex && annotationBounds.Contains(x, y))
                 {
+                    //change the cursor and set the tooltip position.
                     docView.Cursor = Cursors.Hand;
                     docView.ForceCursor = true;
                     if (!tooltip.IsOpen)