- Usually only the number of columns in the flex grid sizer needs to be
- specified using @a cols argument. The number of rows will be deduced
- automatically depending on the number of the elements added to the
- sizer. If the number of @a rows is explicitly specified (and not zero),
- the sizer will check that it no more than @code cols*rows @endcode
- elements are added to it.
-
- The @a gap (or @a vgap and @a hgap, which correspond to the height and
- width of the wxSize object) argument defines the size of the padding
- between the rows (its vertical component, or @a vgap) and columns
- (its horizontal component, or @a hgap), in pixels.