Perl/Tk Pocket Reference

10. Perl/Tk Widgets 67

$tlist->xview(index);

Adjusts the view in the window so that the list entry iden-

tified by index is aligned to the left edge of the window.

$tlist->xviewMoveto(float);

Adjusts the view in the window so that float of the total

width of the TList is off-screen to the left. float must be

between 0 and 1.

$tlist->xviewScroll(integer, what);

Shifts the view in the window left or right according to

integer and what. what must be either

units or pages.

$tlist->yview;

Returns a list containing two elements. Each element is a

real fraction between 0 and 1; together they describe the

vertical span that is visible in the window.

$tlist->yview(index);

Adjusts the view in the window so that the list entry given

by index is displayed at the top of the window.

$tlist->yviewMoveto(float);

Adjusts the view in the window so that the list entry given

by float appears at the top of the window. float must be

between 0 and 1.

$tlist->yviewScroll(integer, what);

Shifts the view in the window up or down according to

integer and what. what must be either

units or pages.

Tree

A Tree widget is derived from the HList class and inherits all

its commands, options, and subwidgets. Tree displays hier-

achical data in a tree form, adjustable by opening or closing

parts of the tree.

-background -relief

-borderwidth -selectbackground

-cursor -selectborderwidth

-exportselection -selectforeground

-font -setgrid

68 Perl/Tk Pocket Reference ...