+
+ /**
+ * Returns the contained AlignFrame complementary to the one given (or null if
+ * no match to top or bottom component).
+ *
+ * @param af
+ * @return
+ */
+ public AlignFrame getComplement(AlignFrame af)
+ {
+ if (topFrame == af)
+ {
+ return bottomFrame;
+ }
+ else if (bottomFrame == af)
+ {
+ return topFrame;
+ }
+ return null;
+ }