[Mono-bugs] [Bug 74744][Nor] New - CurrencyManager does not fire PositionChanged event

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Changed by jordi@ximian.com.

http://bugzilla.ximian.com/show_bug.cgi?id=74744

--- shadow/74744	2005-04-26 15:25:40.000000000 -0400
+++ shadow/74744.tmp.13352	2005-04-26 15:25:40.000000000 -0400
@@ -0,0 +1,127 @@
+Bug#: 74744
+Product: Mono: Class Libraries
+Version: 1.0
+OS: 
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: Windows.Forms
+AssignedTo: jackson@ximian.com                            
+ReportedBy: jordi@ximian.com               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: CurrencyManager does not fire PositionChanged event
+
+The following sample (without any user interaction) fires the
+listBox_DataManagerPositionChg handeler on MS Net when setting Position to
+a value. In our implementation, it does not happen. It also happens for
+PositionChanged. 
+
+I belive that it has to do with how we deal with onCurrentChangedHandler,
+onPositionChangedHandler and CurrentChanged, PositionChanged events.
+
+Sample code:
+
+using System.Windows.Forms;
+using System.Drawing;
+using System;
+using System.Collections;
+
+namespace MyFormProject 
+{
+	
+	public class ourListBox : ListBox
+	{
+		public ourListBox ()  : base ()
+		{
+
+		}
+
+		public CurrencyManager _DataManager {
+			get { return DataManager; }
+		}
+	}	
+	
+	// Data container
+	public class Simbols
+	{
+		private string simbol;
+		private string descripcio;
+
+		public Simbols (string descripcio, string simbol)
+		{
+			this.simbol = simbol;
+			this.descripcio = descripcio;
+		}
+
+		public string Simbol {
+			get { return simbol;}
+		}
+
+		public string Descripcio {
+			get { return descripcio; }
+		}
+
+		public string DescripcioLlarga {
+			get { return descripcio; }
+		}
+
+		public override string ToString ()
+		{
+			return descripcio + " / " + simbol;
+		}
+	}	
+	
+	class MainForm : System.Windows.Forms.Form
+	{	
+				
+		public MainForm ()
+		{
+			
+			ourListBox listBox = new ourListBox ();
+			Controls.Add (listBox);
+            				
+			/* Data */
+			ArrayList simbols = new ArrayList ();
+			simbols.Add (new  Simbols ("Fons Monetari Internacional", "FMI"));
+			simbols.Add (new  Simbols ("Centimetre", "cm"))  ;
+			simbols.Add (new  Simbols ("Ferrocarril", "FC"));
+			simbols.Add (new  Simbols ("Megahertz", "MHz")) ;
+			simbols.Add (new  Simbols ("pesseta", "PTA"));
+			simbols.Add (new  Simbols ("quilogram", "kg"));
+			simbols.Add (new  Simbols ("watt", "W"));
+
+			/* ListBox */
+			listBox.Location = new Point (20, 16);
+			listBox.Size = new Size (250, 130);			
+			
+			listBox.DataSource = simbols;
+			listBox.DisplayMember = "Descripcio";
+			listBox.ValueMember = "Simbol";
+			
+			listBox._DataManager.PositionChanged += new EventHandler
+(listBox_DataManagerPositionChg);
+			listBox._DataManager.Position = 2;
+			
+
+			ClientSize = new Size (600, 600);
+		}	
+		
+		
+		private void listBox_DataManagerPositionChg (object sender,
+System.EventArgs e)
+		{
+			Console.WriteLine ("listBox_DataManagerPositionChg");
+		}
+		
+		public static void Main(string[] args)
+		{
+			Application.Run (new MainForm ());			
+		}
+	}
+	
+}