--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Implab.Diagnostics.Interactive/TraceForm.cs	Fri Apr 18 12:37:48 2014 +0400
@@ -0,0 +1,53 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace Implab.Diagnostics.Interactive {
+    public partial class TraceForm : Form {
+        readonly Dictionary<int, Color> m_threadColors = new Dictionary<int,Color>();
+        readonly Random m_rand = new Random();
+
+        public event EventHandler PauseEvents;
+
+        public event EventHandler ResumeEvents;
+
+        public TraceForm() {
+            InitializeComponent();
+        }
+
+        protected override void OnFormClosing(FormClosingEventArgs e) {
+            base.OnFormClosing(e);
+            if (!e.Cancel && e.CloseReason == CloseReason.UserClosing) {
+                e.Cancel = true;
+                Hide();
+            }
+        }
+
+        public void AddTraceEvent(TraceViewItem item) {
+            traceViewItemBindingSource.Add(item);
+            eventsDataGrid.FirstDisplayedScrollingRowIndex = eventsDataGrid.RowCount - 1;
+        }
+
+        Color GetThreadColor(int thread) {
+            Color result;
+            if (!m_threadColors.TryGetValue(thread, out result)) {
+                result = Color.FromArgb(m_rand.Next(4)*64, m_rand.Next(4)*64, m_rand.Next(4)*64);
+                m_threadColors[thread] = result;
+            }
+            return result;
+        }
+
+        private void eventsDataGrid_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e) {
+            var data = (TraceViewItem)traceViewItemBindingSource[e.RowIndex];
+            if (e.ColumnIndex == messageDataGridViewTextBoxColumn.Index)
+                e.CellStyle.Padding = new Padding(data.Indent * 10,0,0,0);
+            e.CellStyle.ForeColor = GetThreadColor(data.Thread);
+        }
+    }
+}