Prepared to implement improved keyboard navigation

MathPad/MPFunctionLayout.m

@@ -72,15 +72,14 @@
     }];
 }
 
-#pragma mark Size and Drawing Methods
-- (NSRect)generateBounds
+- (NSUInteger)indexOfChildBeforeChildAtIndex:(NSUInteger)index
 {
-    return NSZeroRect;
+    return NSNotFound;
 }
 
-- (void)draw
+- (NSUInteger)indexOfChildAfterChildAtIndex:(NSUInteger)index
 {
-    
+    return NSNotFound;
 }
 
 @end