Box operators

getBoxElements :: Box -> IO [DisplayHandle]

returns the list of components currently managed by a Box.

setBoxElemnts :: Box -> [DisplayHandle] -> IO ()

replace the components being managed by a Box. The `old' components are first told that they have become invisible before resizing and placing the new ones.

addBoxWidgetFront :: Box -> DisplayHandle -> IO ()

add a component to the front of a Box' current list. For the horisontal boxes, the new component will be added to the left, for the vertical layouts, to the top of the column.

addBoxWidgetBack :: Box -> DisplayHandle -> IO ()

add a component to the back of a Box' current list. In the case of horisontal boxes, the component will appear on the right, for vertical ones, at the bottom.