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- # entry.tcl --
- #
- # This file contains Tcl procedures used to manage Tk entries.
- #
- # $Header: /user6/ouster/wish/library/RCS/entry.tcl,v 1.7 93/10/18 17:15:23 ouster Exp $ SPRITE (Berkeley)
- #
- # Copyright (c) 1992-1993 The Regents of the University of California.
- # All rights reserved.
- #
- # Permission is hereby granted, without written agreement and without
- # license or royalty fees, to use, copy, modify, and distribute this
- # software and its documentation for any purpose, provided that the
- # above copyright notice and the following two paragraphs appear in
- # all copies of this software.
- #
- # IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
- # DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
- # OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
- # CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- #
- # THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
- # INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
- # AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
- # ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
- # PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- #
-
- # The procedure below is invoked to backspace over one character
- # in an entry widget. The name of the widget is passed as argument.
-
- proc tk_entryBackspace w {
- set x [expr {[$w index insert] - 1}]
- if {$x != -1} {$w delete $x}
- }
-
- # The procedure below is invoked to backspace over one word in an
- # entry widget. The name of the widget is passed as argument.
-
- proc tk_entryBackword w {
- set string [$w get]
- set curs [expr [$w index insert]-1]
- if {$curs < 0} return
- for {set x $curs} {$x > 0} {incr x -1} {
- if {([string first [string index $string $x] " \t"] < 0)
- && ([string first [string index $string [expr $x-1]] " \t"]
- >= 0)} {
- break
- }
- }
- $w delete $x $curs
- }
-
- # The procedure below is invoked after insertions. If the caret is not
- # visible in the window then the procedure adjusts the entry's view to
- # bring the caret back into the window again. Also, try to keep at
- # least one character visible to the left of the caret.
-
- proc tk_entrySeeCaret w {
- set c [$w index insert]
- set left [$w index @0]
- if {$left >= $c} {
- if {$c > 0} {
- $w view [expr $c-1]
- } else {
- $w view $c
- }
- return
- }
- set x [expr [winfo width $w] - [lindex [$w config -bd] 4] - 1]
- while {([$w index @$x] < $c) && ($left < $c)} {
- set left [expr $left+1]
- $w view $left
- }
- }
-