1tk_focusNext(n)              Tk Built-In Commands              tk_focusNext(n)
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NAME

8       tk_focusNext,  tk_focusPrev,  tk_focusFollowsMouse - Utility procedures
9       for managing the input focus.
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SYNOPSIS

12       tk_focusNext window
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14       tk_focusPrev window
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16       tk_focusFollowsMouse
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DESCRIPTION

21       tk_focusNext is a utility procedure used for  keyboard  traversal.   It
22       returns  the “next” window after window in focus order. The focus order
23       is determined by the stacking order of windows and the structure of the
24       window  hierarchy.   Among siblings, the focus order is the same as the
25       stacking order, with the lowest window being first.  If  a  window  has
26       children, the window is visited first, followed by its children (recur‐
27       sively), followed by its next sibling.  Top-level  windows  other  than
28       window  are  skipped,  so that tk_focusNext never returns a window in a
29       different top-level from window.
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31       After computing the next window,  tk_focusNext  examines  the  window's
32       -takefocus  option  to  see  whether  it  should  be  skipped.   If so,
33       tk_focusNext continues on to the next window in the focus order,  until
34       it eventually finds a window that will accept the focus or returns back
35       to window.
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37       tk_focusPrev is similar to tk_focusNext except that it returns the win‐
38       dow just before window in the focus order.
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40       tk_focusFollowsMouse  changes the focus model for the application to an
41       implicit one where the window under the mouse gets  the  focus.   After
42       this  procedure  is  called, whenever the mouse enters a window Tk will
43       automatically give it the input focus.  The focus command may  be  used
44       to  move  the focus to a window other than the one under the mouse, but
45       as soon as the mouse moves into a new window the  focus  will  jump  to
46       that window.  Note: at present there is no built-in support for return‐
47       ing the application to an explicit focus model;  to do  this  you  will
48       have  to  write a script that deletes the bindings created by tk_focus‐
49       FollowsMouse.
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KEYWORDS

53       focus, keyboard traversal, top-level
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57Tk                                    4.0                      tk_focusNext(n)