first commit

ICSharpCode.TextEditor/Project/UserControls/Int32TextBox.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Windows.Forms;
+
+namespace ICSharpCode.TextEditor.UserControls
+{
+    class Int32TextBox : TextBox
+    {
+        public int Min { get; set; }
+        public int Max { get; set; }
+
+        public Int32TextBox()
+            : this(1, int.MaxValue)
+        {
+        }
+
+        public Int32TextBox(int min, int max)
+        {
+            Min = min;
+            Max = max;
+        }
+
+        protected override void OnTextChanged(EventArgs e)
+        {
+            base.OnTextChanged(e);
+
+            if (!IsValidNumber(Text))
+            {
+                Text = string.Empty;
+            }
+        }
+
+        protected override void WndProc(ref Message m)
+        {
+            const int WM_PASTE = 0x0302;
+
+            if (m.Msg == WM_PASTE)
+            {
+                string text = Clipboard.GetText();
+
+                if (!IsValidNumber(text))
+                    return;
+            }
+
+            base.WndProc(ref m);
+        }
+
+        private bool IsValidNumber(string text)
+        {
+            int i;
+            if (int.TryParse(text, out i))
+            {
+                return i <= Max && i >= Min;
+            }
+
+            return false;
+        }
+    }
+}