AnnObjectCollection Class

using Leadtools.Windows.Controls;
using Leadtools.Windows.Annotations;
using Leadtools.Demos;
using Leadtools.Help;

public void AnnObjectCollectionExample(AnnContainer container)
{
   container.ObjectAdded += new EventHandler<AnnObjectCollectionEventArgs>(container_ObjectAdded);
   container.ObjectRemoved += new EventHandler<AnnObjectCollectionEventArgs>(container_ObjectRemoved);
   // add a few objects
   AnnLineObject lineObj = new AnnLineObject();
   lineObj.Start = new Point(100, 100);
   lineObj.End = new Point(200, 200);
   lineObj.Stroke = Colors.Blue;
   lineObj.StrokeThickness = 2.0;
   lineObj.Header = "Object 1";

   AnnRectangleObject rectObj = new AnnRectangleObject();
   rectObj.Rect = new Rect(200, 200, 100, 100);
   rectObj.Stroke = Colors.Blue;
   rectObj.Fill = Colors.Transparent;
   rectObj.StrokeThickness = 2.0;
   rectObj.Header = "Object 2";

   AnnEllipseObject ellipseObj = new AnnEllipseObject();
   ellipseObj.Rect = new Rect(200, 200, 150, 100);
   ellipseObj.Stroke = Colors.Yellow;
   ellipseObj.Fill = Colors.Green;
   ellipseObj.StrokeThickness = 2.0;
   ellipseObj.Header = "Object 3";

   container.Children.Add(lineObj);
   container.Children.Add(rectObj);
   container.Children.Add(ellipseObj);

   // insert new Object
   AnnLineObject newLineObj = lineObj.Clone() as AnnLineObject;
   newLineObj.Start = new Point(110, 110);
   newLineObj.End = new Point(210, 210);
   newLineObj.Stroke = Colors.Red;
   newLineObj.StrokeThickness = 2.0;
   newLineObj.Header = "New Object";

   container.Children.Insert(1, newLineObj);

   // check if collection contains this new item 
   System.Diagnostics.Debug.Assert(container.Children.Contains(newLineObj));

   // remove this new item 
   container.Children.Remove(newLineObj);
   System.Diagnostics.Debug.Assert(!container.Children.Contains(newLineObj));

   // remove the last item 
   container.Children.RemoveAt(container.Children.Count - 1);
   System.Diagnostics.Debug.Assert(container.Children.Count == 2);

   // send the first item to the end of the collection 
   container.Children.SendToBack(lineObj, true);
   System.Diagnostics.Debug.Assert(container.Children.IndexOf(lineObj) == container.Children.Count - 1);

   // bring it back to the front 
   container.Children.BringToFront(lineObj, true);
   System.Diagnostics.Debug.Assert(container.Children.IndexOf(lineObj) == 0);

   // clean the collection 
   container.Children.Clear();
   System.Diagnostics.Debug.Assert(container.Children.Count == 0);
}

private void container_ObjectAdded(object sender, AnnObjectCollectionEventArgs e)
{
   Console.WriteLine("The Object ((" + e.Object.Header + ")) Has been added to the collection");
}

private void container_ObjectRemoved(System.Object sender, AnnObjectCollectionEventArgs e)
{
   Console.WriteLine("The Object ((" + e.Object.Header + ")) Has been removed from the collection");
}