At some point, there was some hassle about what coordinate system the "where"

BPoint in a mouse moved message is. Turns out it's different (!) according
to the type of message and this is even documented in the BeBook. I don't
really know if we want to copy this, but since there are apps out there that
depend on this, I am implementing it so that it's compatible with BeOS: In
the B_MOUSE_UP/DOWN case, it's the coordinate space of the target view, in
B_MOUSE_MOVED messages, it's that of the window. That explains a few things...
Clicking into Pe's function popup window should now select the right icon.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28742 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/interface/Window.cpp

@@ -3152,14 +3152,24 @@ BWindow::_SanitizeMessage(BMessage* message, BHandler* target, bool usePreferred
 			if (message->FindPoint("screen_where", &where) != B_OK)
 				break;
 
-			// add local window coordinates
-			message->AddPoint("where", ConvertFromScreen(where));
-
 			BView* view = dynamic_cast<BView*>(target);
+
+			if (!view || message->what == B_MOUSE_MOVED) {
+				// add local window coordinates, only
+				// for regular mouse moved messages
+				message->AddPoint("where", ConvertFromScreen(where));
+			}
+
 			if (view != NULL) {
 				// add local view coordinates
-				message->AddPoint("be:view_where",
-					view->ConvertFromScreen(where));
+				BPoint viewWhere = view->ConvertFromScreen(where);
+				if (message->what != B_MOUSE_MOVED) {
+					// Yep, the meaning of "where" is different
+					// for regular mouse moved messages versus
+					// mouse up/down! 
+					message->AddPoint("where", viewWhere);
+				}
+				message->AddPoint("be:view_where", viewWhere);
 
 				if (message->what == B_MOUSE_MOVED) {
 					// is there a token of the view that is currently under