The NoteBook widget provides a notebook metaphor to display several
windows in limited space. The notebook is divided into a stack of pages
of which only one is displayed at any time. The other pages can be
selected by means of choosing the visual ``tabs'' at the top of the
widget. Additionally, the <Tab> key may be used to traverse the pages.
If -underline is used, Alt- bindings will also work.
The widget takes all the options that a Frame does. In addition,
it supports the following options:
If set to false (default and recommended), the size of the NoteBook
will match the size of the largest page. Otherwise the size will
match the size of the current page causing the NoteBook to change
size when different pages of different sizes are selected.
Specifies a callback to be called the first time the page is
shown on the screen. This option can be used to delay the creation
of the contents of a page until necessary. It can be useful in
situations where there are a large number of pages in a NoteBook
widget; with -createcmd you do not have to make the user wait
until all pages are constructed before displaying the first page.
Specifies the integer index of a character to underline in the
tab. This option is used by the default bindings to implement
keyboard traversal for menu buttons and menu entries. 0
corresponds to the first character of text displayed on the
widget, 1 to the next character and so on.
This option specifies the maximum line length of the label string
on this tab. If the line length of the label string exceeds this
length, then it is wrapped onto the next line so that no line is
longer than the specified length. The value may be specified in
any standard forms for screen distances. If this value is less
than or equal to 0, then no wrapping is done: lines will break
only at newline characters in the text.