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markom |
#
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# Entryfield
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# ----------------------------------------------------------------------
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# Implements an enhanced text entry widget.
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#
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# ----------------------------------------------------------------------
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# AUTHOR: Sue Yockey E-mail: yockey@acm.org
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# Mark L. Ulferts E-mail: mulferts@austin.dsccc.com
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#
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# @(#) $Id: entryfield.itk,v 1.1.1.1 2002-01-16 10:24:50 markom Exp $
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# ----------------------------------------------------------------------
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# Copyright (c) 1995 DSC Technologies Corporation
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# ======================================================================
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# Permission to use, copy, modify, distribute and license this software
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# and its documentation for any purpose, and without fee or written
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# agreement with DSC, is hereby granted, provided that the above copyright
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# notice appears in all copies and that both the copyright notice and
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# warranty disclaimer below appear in supporting documentation, and that
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# the names of DSC Technologies Corporation or DSC Communications
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# Corporation not be used in advertising or publicity pertaining to the
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# software without specific, written prior permission.
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#
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# DSC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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# ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, AND NON-
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# INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND THE
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# AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE MAINTENANCE,
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# SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. IN NO EVENT SHALL
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# DSC BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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# ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTUOUS ACTION,
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# ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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# SOFTWARE.
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# ======================================================================
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#
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# Usual options.
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#
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itk::usual Entryfield {
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keep -background -borderwidth -cursor -foreground -highlightcolor \
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-highlightthickness -insertbackground -insertborderwidth \
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-insertofftime -insertontime -insertwidth -labelfont \
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-selectbackground -selectborderwidth -selectforeground \
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-textbackground -textfont
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}
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# ------------------------------------------------------------------
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# ENTRYFIELD
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# ------------------------------------------------------------------
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class iwidgets::Entryfield {
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inherit iwidgets::Labeledwidget
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constructor {args} {}
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itk_option define -childsitepos childSitePos Position e
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itk_option define -command command Command {}
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itk_option define -fixed fixed Fixed 0
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itk_option define -focuscommand focusCommand Command {}
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itk_option define -invalid invalid Command {bell}
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itk_option define -validate validate Command {}
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public {
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method childsite {}
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method get {}
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method delete {args}
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method icursor {args}
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method index {args}
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method insert {args}
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method scan {args}
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method selection {args}
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method xview {args}
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method clear {}
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}
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proc numeric {char} {}
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proc integer {string} {}
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proc alphabetic {char} {}
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proc alphanumeric {char} {}
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proc hexidecimal {string} {}
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proc real {string} {}
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protected {
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method _focusCommand {}
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method _keyPress {char sym state}
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}
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private method _peek {char}
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}
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#
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# Provide a lowercased access method for the Entryfield class.
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#
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proc ::iwidgets::entryfield {pathName args} {
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uplevel ::iwidgets::Entryfield $pathName $args
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}
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# ------------------------------------------------------------------
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# CONSTRUCTOR
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# ------------------------------------------------------------------
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body iwidgets::Entryfield::constructor {args} {
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component hull configure -borderwidth 0
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itk_component add entry {
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entry $itk_interior.entry
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} {
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keep -borderwidth -cursor -exportselection \
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-foreground -highlightcolor \
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-highlightthickness -insertbackground -insertborderwidth \
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-insertofftime -insertontime -insertwidth -justify \
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-relief -selectbackground -selectborderwidth \
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-selectforeground -show -state -textvariable -width
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rename -font -textfont textFont Font
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rename -highlightbackground -background background Background
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rename -background -textbackground textBackground Background
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}
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#
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# Create the child site widget.
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#
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itk_component add -protected efchildsite {
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frame $itk_interior.efchildsite
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}
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set itk_interior $itk_component(efchildsite)
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#
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# Entryfield instance bindings.
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#
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bind $itk_component(entry) [code $this _keyPress %A %K %s]
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bind $itk_component(entry) [code $this _focusCommand]
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#
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# Initialize the widget based on the command line options.
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#
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eval itk_initialize $args
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}
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# ------------------------------------------------------------------
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# OPTIONS
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# ------------------------------------------------------------------
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# ------------------------------------------------------------------
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# OPTION: -command
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#
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# Command associated upon detection of Return key press event
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# ------------------------------------------------------------------
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configbody iwidgets::Entryfield::command {}
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# ------------------------------------------------------------------
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# OPTION: -focuscommand
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#
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# Command associated upon detection of focus.
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# ------------------------------------------------------------------
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configbody iwidgets::Entryfield::focuscommand {}
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# ------------------------------------------------------------------
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# OPTION: -validate
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#
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# Specify a command to executed for the validation of Entryfields.
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# ------------------------------------------------------------------
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configbody iwidgets::Entryfield::validate {
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switch $itk_option(-validate) {
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{} {
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set itk_option(-validate) {}
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}
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numeric {
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set itk_option(-validate) "::iwidgets::Entryfield::numeric %c"
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}
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integer {
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set itk_option(-validate) "::iwidgets::Entryfield::integer %P"
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}
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hexidecimal {
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set itk_option(-validate) "::iwidgets::Entryfield::hexidecimal %P"
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}
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real {
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set itk_option(-validate) "::iwidgets::Entryfield::real %P"
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}
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alphabetic {
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set itk_option(-validate) "::iwidgets::Entryfield::alphabetic %c"
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}
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alphanumeric {
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set itk_option(-validate) "::iwidgets::Entryfield::alphanumeric %c"
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}
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}
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}
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# ------------------------------------------------------------------
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# OPTION: -invalid
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#
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# Specify a command to executed should the current Entryfield contents
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# be proven invalid.
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# ------------------------------------------------------------------
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configbody iwidgets::Entryfield::invalid {}
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# ------------------------------------------------------------------
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# OPTION: -fixed
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#
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# Restrict entry to 0 (unlimited) chars. The value is the maximum
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# number of chars the user may type into the field, regardles of
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# field width, i.e. the field width may be 20, but the user will
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# only be able to type -fixed number of characters into it (or
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# unlimited if -fixed = 0).
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# ------------------------------------------------------------------
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configbody iwidgets::Entryfield::fixed {
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if {[regexp {[^0-9]} $itk_option(-fixed)] || \
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($itk_option(-fixed) < 0)} {
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error "bad fixed option \"$itk_option(-fixed)\",\
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should be positive integer"
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}
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}
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# ------------------------------------------------------------------
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# OPTION: -childsitepos
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#
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# Specifies the position of the child site in the widget.
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# ------------------------------------------------------------------
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configbody iwidgets::Entryfield::childsitepos {
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set parent [winfo parent $itk_component(entry)]
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switch $itk_option(-childsitepos) {
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n {
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grid $itk_component(efchildsite) -row 0 -column 0 -sticky ew
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grid $itk_component(entry) -row 1 -column 0 -sticky nsew
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grid rowconfigure $parent 0 -weight 0
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grid rowconfigure $parent 1 -weight 1
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grid columnconfigure $parent 0 -weight 1
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grid columnconfigure $parent 1 -weight 0
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}
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e {
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grid $itk_component(efchildsite) -row 0 -column 1 -sticky ns
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grid $itk_component(entry) -row 0 -column 0 -sticky nsew
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grid rowconfigure $parent 0 -weight 1
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grid rowconfigure $parent 1 -weight 0
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grid columnconfigure $parent 0 -weight 1
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grid columnconfigure $parent 1 -weight 0
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}
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s {
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grid $itk_component(efchildsite) -row 1 -column 0 -sticky ew
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grid $itk_component(entry) -row 0 -column 0 -sticky nsew
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grid rowconfigure $parent 0 -weight 1
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grid rowconfigure $parent 1 -weight 0
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grid columnconfigure $parent 0 -weight 1
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grid columnconfigure $parent 1 -weight 0
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}
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w {
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grid $itk_component(efchildsite) -row 0 -column 0 -sticky ns
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grid $itk_component(entry) -row 0 -column 1 -sticky nsew
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grid rowconfigure $parent 0 -weight 1
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grid rowconfigure $parent 1 -weight 0
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grid columnconfigure $parent 0 -weight 0
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grid columnconfigure $parent 1 -weight 1
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}
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default {
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error "bad childsite option\
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\"$itk_option(-childsitepos)\":\
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should be n, e, s, or w"
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}
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}
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}
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# ------------------------------------------------------------------
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# METHODS
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# ------------------------------------------------------------------
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# ------------------------------------------------------------------
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# METHOD: childsite
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#
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# Returns the path name of the child site widget.
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# ------------------------------------------------------------------
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body iwidgets::Entryfield::childsite {} {
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return $itk_component(efchildsite)
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}
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# ------------------------------------------------------------------
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# METHOD: get
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#
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# Thin wrap of the standard entry widget get method.
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# ------------------------------------------------------------------
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body iwidgets::Entryfield::get {} {
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return [$itk_component(entry) get]
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}
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# ------------------------------------------------------------------
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# METHOD: delete
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#
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# Thin wrap of the standard entry widget delete method.
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# ------------------------------------------------------------------
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body iwidgets::Entryfield::delete {args} {
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return [eval $itk_component(entry) delete $args]
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}
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# ------------------------------------------------------------------
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# METHOD: icursor
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#
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# Thin wrap of the standard entry widget icursor method.
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# ------------------------------------------------------------------
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body iwidgets::Entryfield::icursor {args} {
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return [eval $itk_component(entry) icursor $args]
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}
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# ------------------------------------------------------------------
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# METHOD: index
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#
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# Thin wrap of the standard entry widget index method.
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# ------------------------------------------------------------------
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body iwidgets::Entryfield::index {args} {
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return [eval $itk_component(entry) index $args]
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}
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# ------------------------------------------------------------------
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# METHOD: insert
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#
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# Thin wrap of the standard entry widget index method.
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# ------------------------------------------------------------------
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body iwidgets::Entryfield::insert {args} {
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return [eval $itk_component(entry) insert $args]
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}
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# ------------------------------------------------------------------
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# METHOD: scan
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#
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# Thin wrap of the standard entry widget scan method.
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# ------------------------------------------------------------------
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body iwidgets::Entryfield::scan {args} {
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return [eval $itk_component(entry) scan $args]
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}
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# ------------------------------------------------------------------
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# METHOD: selection
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#
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# Thin wrap of the standard entry widget selection method.
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# ------------------------------------------------------------------
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body iwidgets::Entryfield::selection {args} {
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return [eval $itk_component(entry) selection $args]
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}
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# ------------------------------------------------------------------
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# METHOD: xview
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#
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# Thin wrap of the standard entry widget xview method.
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# ------------------------------------------------------------------
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body iwidgets::Entryfield::xview {args} {
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return [eval $itk_component(entry) xview $args]
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}
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# ------------------------------------------------------------------
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# METHOD: clear
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#
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# Delete the current entry contents.
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# ------------------------------------------------------------------
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body iwidgets::Entryfield::clear {} {
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$itk_component(entry) delete 0 end
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icursor 0
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}
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# ------------------------------------------------------------------
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# PROCEDURE: numeric char
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#
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# The numeric procedure validates character input for a given
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# Entryfield to be numeric and returns the result.
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# ------------------------------------------------------------------
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body iwidgets::Entryfield::numeric {char} {
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return [regexp {[0-9]} $char]
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}
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# ------------------------------------------------------------------
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# PROCEDURE: integer string
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#
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# The integer procedure validates character input for a given
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# Entryfield to be integer and returns the result.
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# ------------------------------------------------------------------
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body iwidgets::Entryfield::integer {string} {
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return [regexp {^[-+]?[0-9]*$} $string]
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}
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|
# ------------------------------------------------------------------
|
384 |
|
|
# PROCEDURE: alphabetic char
|
385 |
|
|
#
|
386 |
|
|
# The alphabetic procedure validates character input for a given
|
387 |
|
|
# Entryfield to be alphabetic and returns the result.
|
388 |
|
|
# ------------------------------------------------------------------
|
389 |
|
|
body iwidgets::Entryfield::alphabetic {char} {
|
390 |
|
|
return [regexp -nocase {[a-z]} $char]
|
391 |
|
|
}
|
392 |
|
|
|
393 |
|
|
# ------------------------------------------------------------------
|
394 |
|
|
# PROCEDURE: alphanumeric char
|
395 |
|
|
#
|
396 |
|
|
# The alphanumeric procedure validates character input for a given
|
397 |
|
|
# Entryfield to be alphanumeric and returns the result.
|
398 |
|
|
# ------------------------------------------------------------------
|
399 |
|
|
body iwidgets::Entryfield::alphanumeric {char} {
|
400 |
|
|
return [regexp -nocase {[0-9a-z]} $char]
|
401 |
|
|
}
|
402 |
|
|
|
403 |
|
|
# ------------------------------------------------------------------
|
404 |
|
|
# PROCEDURE: hexadecimal string
|
405 |
|
|
#
|
406 |
|
|
# The hexidecimal procedure validates character input for a given
|
407 |
|
|
# Entryfield to be hexidecimal and returns the result.
|
408 |
|
|
# ------------------------------------------------------------------
|
409 |
|
|
body iwidgets::Entryfield::hexidecimal {string} {
|
410 |
|
|
return [regexp {^(0x)?[0-9a-fA-F]*$} $string]
|
411 |
|
|
}
|
412 |
|
|
|
413 |
|
|
# ------------------------------------------------------------------
|
414 |
|
|
# PROCEDURE: real string
|
415 |
|
|
#
|
416 |
|
|
# The real procedure validates character input for a given Entryfield
|
417 |
|
|
# to be real and returns the result.
|
418 |
|
|
# ------------------------------------------------------------------
|
419 |
|
|
body iwidgets::Entryfield::real {string} {
|
420 |
|
|
return [regexp {^[-+]?[0-9]*\.?[0-9]*([0-9]\.?[eE][-+]?[0-9]*)?$} $string]
|
421 |
|
|
}
|
422 |
|
|
|
423 |
|
|
# ------------------------------------------------------------------
|
424 |
|
|
# PRIVATE METHOD: _peek char
|
425 |
|
|
#
|
426 |
|
|
# The peek procedure returns the value of the Entryfield with the
|
427 |
|
|
# char inserted at the insert position.
|
428 |
|
|
# ------------------------------------------------------------------
|
429 |
|
|
body iwidgets::Entryfield::_peek {char} {
|
430 |
|
|
set str [get]
|
431 |
|
|
|
432 |
|
|
set insertPos [index insert]
|
433 |
|
|
set firstPart [string range $str 0 [expr $insertPos - 1]]
|
434 |
|
|
set lastPart [string range $str $insertPos end]
|
435 |
|
|
|
436 |
|
|
regsub -all {\\} "$char" {\\\\} char
|
437 |
|
|
append rtnVal $firstPart $char $lastPart
|
438 |
|
|
return $rtnVal
|
439 |
|
|
}
|
440 |
|
|
|
441 |
|
|
# ------------------------------------------------------------------
|
442 |
|
|
# PROTECTED METHOD: _focusCommand
|
443 |
|
|
#
|
444 |
|
|
# Method bound to focus event which evaluates the current command
|
445 |
|
|
# specified in the focuscommand option
|
446 |
|
|
# ------------------------------------------------------------------
|
447 |
|
|
body iwidgets::Entryfield::_focusCommand {} {
|
448 |
|
|
uplevel #0 $itk_option(-focuscommand)
|
449 |
|
|
}
|
450 |
|
|
|
451 |
|
|
# ------------------------------------------------------------------
|
452 |
|
|
# PROTECTED METHOD: _keyPress
|
453 |
|
|
#
|
454 |
|
|
# Monitor the key press event checking for return keys, fixed width
|
455 |
|
|
# specification, and optional validation procedures.
|
456 |
|
|
# ------------------------------------------------------------------
|
457 |
|
|
body iwidgets::Entryfield::_keyPress {char sym state} {
|
458 |
|
|
#
|
459 |
|
|
# A Return key invokes the optionally specified command option.
|
460 |
|
|
#
|
461 |
|
|
if {$sym == "Return"} {
|
462 |
|
|
uplevel #0 $itk_option(-command)
|
463 |
|
|
return -code break 1
|
464 |
|
|
}
|
465 |
|
|
|
466 |
|
|
#
|
467 |
|
|
# Tabs, BackSpace, and Delete are passed on for other bindings.
|
468 |
|
|
#
|
469 |
|
|
if {($sym == "Tab") || ($sym == "BackSpace") || ($sym == "Delete")} {
|
470 |
|
|
return -code continue 1
|
471 |
|
|
}
|
472 |
|
|
|
473 |
|
|
#
|
474 |
|
|
# Character is not printable or the state is greater than one which
|
475 |
|
|
# means a modifier was used such as a control, meta key, or control
|
476 |
|
|
# or meta key with numlock down.
|
477 |
|
|
#
|
478 |
|
|
if {($char == "") || \
|
479 |
|
|
($state == 4) || ($state == 8) || \
|
480 |
|
|
($state == 36) || ($state == 40)} {
|
481 |
|
|
return -code continue 1
|
482 |
|
|
}
|
483 |
|
|
|
484 |
|
|
#
|
485 |
|
|
# If the fixed length option is not zero, then verify that the
|
486 |
|
|
# current length plus one will not exceed the limit. If so then
|
487 |
|
|
# invoke the invalid command procedure.
|
488 |
|
|
#
|
489 |
|
|
if {$itk_option(-fixed) != 0} {
|
490 |
|
|
if {[string length [get]] >= $itk_option(-fixed)} {
|
491 |
|
|
uplevel #0 $itk_option(-invalid)
|
492 |
|
|
return -code break 0
|
493 |
|
|
}
|
494 |
|
|
}
|
495 |
|
|
|
496 |
|
|
#
|
497 |
|
|
# The validate option may contain a keyword (numeric, alphabetic),
|
498 |
|
|
# the name of a procedure, or nothing. The numeric and alphabetic
|
499 |
|
|
# keywords engage typical base level checks. If a command procedure
|
500 |
|
|
# is specified, then invoke it with the object and character passed
|
501 |
|
|
# as arguments. If the validate procedure returns false, then the
|
502 |
|
|
# invalid procedure is called.
|
503 |
|
|
#
|
504 |
|
|
if {$itk_option(-validate) != {}} {
|
505 |
|
|
set cmd $itk_option(-validate)
|
506 |
|
|
|
507 |
|
|
regsub -all "%W" "$cmd" $itk_component(hull) cmd
|
508 |
|
|
regsub -all "%P" "$cmd" [list [_peek $char]] cmd
|
509 |
|
|
regsub -all "%S" "$cmd" [list [get]] cmd
|
510 |
|
|
regsub -all "%c" "$cmd" [list $char] cmd
|
511 |
|
|
regsub -all {\\} "$cmd" {\\\\} cmd
|
512 |
|
|
|
513 |
|
|
set valid [uplevel #0 $cmd]
|
514 |
|
|
|
515 |
|
|
if {($valid == "") || ([regexp 0|false|off|no $valid])} {
|
516 |
|
|
uplevel #0 $itk_option(-invalid)
|
517 |
|
|
return -code break 0
|
518 |
|
|
}
|
519 |
|
|
}
|
520 |
|
|
|
521 |
|
|
return -code continue 1
|
522 |
|
|
}
|
523 |
|
|
|