Each component has a minimum width and a minimum height, smaller than which it will not be. If the component's minimum size is smaller than the component's display area, then only part of the component will be shown.
The ipadx and ipady fields let you
increase this minimum size by padding the edges of the component
with extra pixels. For instance setting ipadx to two
will guarantee that the component is at least four pixels wider
than its normal minimum. (ipadx adds two pixels to
each side.) This is not needed for the calculator applet.