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