Class to encapsulate the notion of an item.
This might be a list or (popup)menu item, or a node in a tree.
It can contain multiple fields, an icon, and an object reference.
Returns the height that would be occupied by a horizontal
scrollbar, which is independent of whether it is currently
displayed by the scroll pane or not.
Returns the array of strings resulting from attempting to fit a string into a specified width,
according to the specified font metrics and splitting the original string at spaces.
Specifies that horizontal/vertical scrollbar should be shown
only when the size of the child exceeds the size of the scrollpane
in the horizontal/vertical dimension.