Initial Commit

Charts/Navigation/MessagesHelper.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Windows;
+
+namespace Microsoft.Research.DynamicDataDisplay.Navigation
+{
+    /// <summary>Helper class to parse Windows messages</summary>
+	internal static class MessagesHelper {
+		internal static int GetXFromLParam(IntPtr lParam) {
+			return LOWORD(lParam.ToInt32());
+		}
+
+		internal static int GetYFromLParam(IntPtr lParam) {
+			return HIWORD(lParam.ToInt32());
+		}
+
+		internal static Point GetMousePosFromLParam(IntPtr lParam) {
+			return new Point(GetXFromLParam(lParam), GetYFromLParam(lParam));
+		}
+
+		internal static int GetWheelDataFromWParam(IntPtr wParam) {
+			return HIWORD(wParam.ToInt32());
+		}
+
+		internal static short HIWORD(int i) {
+			return (short)((i & 0xFFFF0000) >> 16);
+		}
+
+		internal static short LOWORD(int i) {
+			return (short)(i & 0x0000FFFF);
+		}
+	}
+}