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604 lines
21 KiB
Plaintext
604 lines
21 KiB
Plaintext
15 years ago
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#
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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 1.6 2001/09/17 19:24:46 smithc 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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itcl::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 -pasting pasting Behavior 1
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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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private method _checkLength {}
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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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itcl::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) <KeyPress> [itcl::code $this _keyPress %A %K %s]
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bind $itk_component(entry) <FocusIn> [itcl::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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itcl::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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itcl::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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itcl::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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itcl::configbody iwidgets::Entryfield::invalid {}
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# ------------------------------------------------------------------
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# OPTION: -pasting
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#
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# Allows the developer to enable and disable pasting into the entry
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# component of the entryfield. This is done to avoid potential stack
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# dumps when using the -validate configuration option. Plus, it's just
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# a good idea to have complete control over what you allow the user
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# to enter into the entryfield.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Entryfield::pasting {
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set oldtags [bindtags $itk_component(entry)]
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if {[lindex $oldtags 0] != "pastetag"} {
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bindtags $itk_component(entry) [linsert $oldtags 0 pastetag]
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}
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if ($itk_option(-pasting)) {
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bind pastetag <ButtonRelease-2> [itcl::code $this _checkLength]
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bind pastetag <Control-v> [itcl::code $this _checkLength]
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bind pastetag <Insert> [itcl::code $this _checkLength]
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bind pastetag <KeyPress> {}
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} else {
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bind pastetag <ButtonRelease-2> {break}
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bind pastetag <Control-v> {break}
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bind pastetag <Insert> {break}
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bind pastetag <KeyPress> {
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# Disable function keys > F9.
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if {[regexp {^F[1,2][0-9]+$} "%K"]} {
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break
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}
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}
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}
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}
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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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itcl::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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itcl::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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itcl::body iwidgets::Entryfield::childsite {} {
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return $itk_component(efchildsite)
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}
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# ------------------------------------------------------------------
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# METHOD: get
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#
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# Thin wrap of the standard entry widget get method.
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# ------------------------------------------------------------------
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itcl::body iwidgets::Entryfield::get {} {
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return [$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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itcl::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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itcl::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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itcl::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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itcl::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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itcl::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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itcl::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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||
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itcl::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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||
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# METHOD: clear
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|
#
|
||
|
|
# Delete the current entry contents.
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
itcl::body iwidgets::Entryfield::clear {} {
|
||
|
|
$itk_component(entry) delete 0 end
|
||
|
|
icursor 0
|
||
|
|
}
|
||
|
|
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
# PROCEDURE: numeric char
|
||
|
|
#
|
||
|
|
# The numeric procedure validates character input for a given
|
||
|
|
# Entryfield to be numeric and returns the result.
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
itcl::body iwidgets::Entryfield::numeric {char} {
|
||
|
|
return [regexp {[0-9]} $char]
|
||
|
|
}
|
||
|
|
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
# PROCEDURE: integer string
|
||
|
|
#
|
||
|
|
# The integer procedure validates character input for a given
|
||
|
|
# Entryfield to be integer and returns the result.
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
itcl::body iwidgets::Entryfield::integer {string} {
|
||
|
|
return [regexp {^[-+]?[0-9]*$} $string]
|
||
|
|
}
|
||
|
|
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
# PROCEDURE: alphabetic char
|
||
|
|
#
|
||
|
|
# The alphabetic procedure validates character input for a given
|
||
|
|
# Entryfield to be alphabetic and returns the result.
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
itcl::body iwidgets::Entryfield::alphabetic {char} {
|
||
|
|
return [regexp -nocase {[a-z]} $char]
|
||
|
|
}
|
||
|
|
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
# PROCEDURE: alphanumeric char
|
||
|
|
#
|
||
|
|
# The alphanumeric procedure validates character input for a given
|
||
|
|
# Entryfield to be alphanumeric and returns the result.
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
itcl::body iwidgets::Entryfield::alphanumeric {char} {
|
||
|
|
return [regexp -nocase {[0-9a-z]} $char]
|
||
|
|
}
|
||
|
|
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
# PROCEDURE: hexadecimal string
|
||
|
|
#
|
||
|
|
# The hexidecimal procedure validates character input for a given
|
||
|
|
# Entryfield to be hexidecimal and returns the result.
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
itcl::body iwidgets::Entryfield::hexidecimal {string} {
|
||
|
|
return [regexp {^(0x)?[0-9a-fA-F]*$} $string]
|
||
|
|
}
|
||
|
|
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
# PROCEDURE: real string
|
||
|
|
#
|
||
|
|
# The real procedure validates character input for a given Entryfield
|
||
|
|
# to be real and returns the result.
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
itcl::body iwidgets::Entryfield::real {string} {
|
||
|
|
return [regexp {^[-+]?[0-9]*\.?[0-9]*([0-9]\.?[eE][-+]?[0-9]*)?$} $string]
|
||
|
|
}
|
||
|
|
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
# PRIVATE METHOD: _peek char
|
||
|
|
#
|
||
|
|
# The peek procedure returns the value of the Entryfield with the
|
||
|
|
# char inserted at the insert position.
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
itcl::body iwidgets::Entryfield::_peek {char} {
|
||
|
|
set str [get]
|
||
|
|
|
||
|
|
set insertPos [index insert]
|
||
|
|
set firstPart [string range $str 0 [expr {$insertPos - 1}]]
|
||
|
|
set lastPart [string range $str $insertPos end]
|
||
|
|
|
||
|
|
regsub -all {\\} "$char" {\\\\} char
|
||
|
|
append rtnVal $firstPart $char $lastPart
|
||
|
|
return $rtnVal
|
||
|
|
}
|
||
|
|
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
# PROTECTED METHOD: _focusCommand
|
||
|
|
#
|
||
|
|
# Method bound to focus event which evaluates the current command
|
||
|
|
# specified in the focuscommand option
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
itcl::body iwidgets::Entryfield::_focusCommand {} {
|
||
|
|
uplevel #0 $itk_option(-focuscommand)
|
||
|
|
}
|
||
|
|
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
# PROTECTED METHOD: _keyPress
|
||
|
|
#
|
||
|
|
# Monitor the key press event checking for return keys, fixed width
|
||
|
|
# specification, and optional validation procedures.
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
itcl::body iwidgets::Entryfield::_keyPress {char sym state} {
|
||
|
|
#
|
||
|
|
# A Return key invokes the optionally specified command option.
|
||
|
|
#
|
||
|
|
if {$sym == "Return"} {
|
||
|
|
uplevel #0 $itk_option(-command)
|
||
|
|
return -code break 1
|
||
|
|
}
|
||
|
|
|
||
|
|
#
|
||
|
|
# Tabs, BackSpace, and Delete are passed on for other bindings.
|
||
|
|
#
|
||
|
|
if {($sym == "Tab") || ($sym == "BackSpace") || ($sym == "Delete")} {
|
||
|
|
return -code continue 1
|
||
|
|
}
|
||
|
|
|
||
|
|
#
|
||
|
|
# Character is not printable or the state is greater than one which
|
||
|
|
# means a modifier was used such as a control, meta key, or control
|
||
|
|
# or meta key with numlock down.
|
||
|
|
#
|
||
|
|
#-----------------------------------------------------------
|
||
|
|
# BUG FIX: csmith (Chad Smith: csmith@adc.com), 3/15/99
|
||
|
|
#-----------------------------------------------------------
|
||
|
|
# The following conditional used to hardcode specific state values, such
|
||
|
|
# as "4" and "8". These values are used to detect <Ctrl>, <Shift>, etc.
|
||
|
|
# key combinations. On the windows platform, the <Alt> key is state
|
||
|
|
# 16, and on the unix platform, the <Alt> key is state 8. All <Ctrl>
|
||
|
|
# and <Alt> combinations should be masked out, regardless of the
|
||
|
|
# <NumLock> or <CapsLock> status, and regardless of platform.
|
||
|
|
#-----------------------------------------------------------
|
||
|
|
set CTRL 4
|
||
|
|
global tcl_platform
|
||
|
|
if {$tcl_platform(platform) == "unix"} {
|
||
|
|
set ALT 8
|
||
|
|
} elseif {$tcl_platform(platform) == "windows"} {
|
||
|
|
set ALT 16
|
||
|
|
} else {
|
||
|
|
# This is something other than UNIX or WINDOWS. Default to the
|
||
|
|
# old behavior (UNIX).
|
||
|
|
set ALT 8
|
||
|
|
}
|
||
|
|
# Thanks to Rolf Schroedter for the following elegant conditional. This
|
||
|
|
# masks out all <Ctrl> and <Alt> key combinations.
|
||
|
|
if {($char == "") || ($state & ($CTRL | $ALT))} {
|
||
|
|
return -code continue 1
|
||
|
|
}
|
||
|
|
|
||
|
|
#
|
||
|
|
# If the fixed length option is not zero, then verify that the
|
||
|
|
# current length plus one will not exceed the limit. If so then
|
||
|
|
# invoke the invalid command procedure.
|
||
|
|
#
|
||
|
|
if {$itk_option(-fixed) != 0} {
|
||
|
|
if {[string length [get]] >= $itk_option(-fixed)} {
|
||
|
|
uplevel #0 $itk_option(-invalid)
|
||
|
|
return -code break 0
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#
|
||
|
|
# The validate option may contain a keyword (numeric, alphabetic),
|
||
|
|
# the name of a procedure, or nothing. The numeric and alphabetic
|
||
|
|
# keywords engage typical base level checks. If a command procedure
|
||
|
|
# is specified, then invoke it with the object and character passed
|
||
|
|
# as arguments. If the validate procedure returns false, then the
|
||
|
|
# invalid procedure is called.
|
||
|
|
#
|
||
|
|
if {$itk_option(-validate) != {}} {
|
||
|
|
set cmd $itk_option(-validate)
|
||
|
|
|
||
|
|
regsub -all "%W" "$cmd" $itk_component(hull) cmd
|
||
|
|
regsub -all "%P" "$cmd" [list [_peek $char]] cmd
|
||
|
|
regsub -all "%S" "$cmd" [list [get]] cmd
|
||
|
|
regsub -all "%c" "$cmd" [list $char] cmd
|
||
|
|
regsub -all {\\} "$cmd" {\\\\} cmd
|
||
|
|
|
||
|
|
set valid [uplevel #0 $cmd]
|
||
|
|
|
||
|
|
if {($valid == "") || ([regexp 0|false|off|no $valid])} {
|
||
|
|
uplevel #0 $itk_option(-invalid)
|
||
|
|
return -code break 0
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return -code continue 1
|
||
|
|
}
|
||
|
|
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
# PRIVATE METHOD: _checkLength
|
||
|
|
#
|
||
|
|
# This method was added by csmith for SF ticket 227912. We need to
|
||
|
|
# to check the clipboard content before allowing any pasting into
|
||
|
|
# the entryfield to disallow text that is longer than the value
|
||
|
|
# specified by the -fixed option.
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
itcl::body iwidgets::Entryfield::_checkLength {} {
|
||
|
|
if {$itk_option(-fixed) != 0} {
|
||
|
|
if [catch {::selection get -selection CLIPBOARD} pending] {
|
||
|
|
# Nothing in the clipboard. Check the primary selection.
|
||
|
|
if [catch {::selection get -selection PRIMARY} pending] {
|
||
|
|
# Nothing here either. Goodbye.
|
||
|
|
return
|
||
|
|
}
|
||
|
|
}
|
||
|
|
set len [expr {[string length $pending] + [string length [get]]}]
|
||
|
|
if {$len > $itk_option(-fixed)} {
|
||
|
|
uplevel #0 $itk_option(-invalid)
|
||
|
|
return -code break 0
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|