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- #
- # Entryfield
- # ----------------------------------------------------------------------
- # Implements an enhanced text entry widget.
- #
- # ----------------------------------------------------------------------
- # AUTHOR: Sue Yockey E-mail: yockey@acm.org
- # Mark L. Ulferts E-mail: mulferts@austin.dsccc.com
- #
- # @(#) $Id: entryfield.itk,v 1.6 2001/09/17 19:24:46 smithc Exp $
- # ----------------------------------------------------------------------
- # Copyright (c) 1995 DSC Technologies Corporation
- # ======================================================================
- # Permission to use, copy, modify, distribute and license this software
- # and its documentation for any purpose, and without fee or written
- # agreement with DSC, is hereby granted, provided that the above copyright
- # notice appears in all copies and that both the copyright notice and
- # warranty disclaimer below appear in supporting documentation, and that
- # the names of DSC Technologies Corporation or DSC Communications
- # Corporation not be used in advertising or publicity pertaining to the
- # software without specific, written prior permission.
- #
- # DSC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
- # ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, AND NON-
- # INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND THE
- # AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE MAINTENANCE,
- # SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. IN NO EVENT SHALL
- # DSC BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
- # ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- # WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTUOUS ACTION,
- # ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- # SOFTWARE.
- # ======================================================================
-
- #
- # Usual options.
- #
- itk::usual Entryfield {
- keep -background -borderwidth -cursor -foreground -highlightcolor \
- -highlightthickness -insertbackground -insertborderwidth \
- -insertofftime -insertontime -insertwidth -labelfont \
- -selectbackground -selectborderwidth -selectforeground \
- -textbackground -textfont
- }
-
- # ------------------------------------------------------------------
- # ENTRYFIELD
- # ------------------------------------------------------------------
- itcl::class iwidgets::Entryfield {
- inherit iwidgets::Labeledwidget
-
- constructor {args} {}
-
- itk_option define -childsitepos childSitePos Position e
- itk_option define -command command Command {}
- itk_option define -fixed fixed Fixed 0
- itk_option define -focuscommand focusCommand Command {}
- itk_option define -invalid invalid Command {bell}
- itk_option define -pasting pasting Behavior 1
- itk_option define -validate validate Command {}
-
- public {
- method childsite {}
- method get {}
- method delete {args}
- method icursor {args}
- method index {args}
- method insert {args}
- method scan {args}
- method selection {args}
- method xview {args}
- method clear {}
- }
-
- proc numeric {char} {}
- proc integer {string} {}
- proc alphabetic {char} {}
- proc alphanumeric {char} {}
- proc hexidecimal {string} {}
- proc real {string} {}
-
- protected {
- method _focusCommand {}
- method _keyPress {char sym state}
- }
-
- private method _peek {char}
- private method _checkLength {}
- }
-
- #
- # Provide a lowercased access method for the Entryfield class.
- #
- proc ::iwidgets::entryfield {pathName args} {
- uplevel ::iwidgets::Entryfield $pathName $args
- }
-
- # ------------------------------------------------------------------
- # CONSTRUCTOR
- # ------------------------------------------------------------------
- itcl::body iwidgets::Entryfield::constructor {args} {
- component hull configure -borderwidth 0
-
- itk_component add entry {
- entry $itk_interior.entry
- } {
- keep -borderwidth -cursor -exportselection \
- -foreground -highlightcolor \
- -highlightthickness -insertbackground -insertborderwidth \
- -insertofftime -insertontime -insertwidth -justify \
- -relief -selectbackground -selectborderwidth \
- -selectforeground -show -state -textvariable -width
-
- rename -font -textfont textFont Font
- rename -highlightbackground -background background Background
- rename -background -textbackground textBackground Background
- }
-
- #
- # Create the child site widget.
- #
- itk_component add -protected efchildsite {
- frame $itk_interior.efchildsite
- }
- set itk_interior $itk_component(efchildsite)
-
- #
- # Entryfield instance bindings.
- #
- bind $itk_component(entry) <KeyPress> [itcl::code $this _keyPress %A %K %s]
- bind $itk_component(entry) <FocusIn> [itcl::code $this _focusCommand]
-
- #
- # Initialize the widget based on the command line options.
- #
- eval itk_initialize $args
- }
-
- # ------------------------------------------------------------------
- # OPTIONS
- # ------------------------------------------------------------------
-
- # ------------------------------------------------------------------
- # OPTION: -command
- #
- # Command associated upon detection of Return key press event
- # ------------------------------------------------------------------
- itcl::configbody iwidgets::Entryfield::command {}
-
- # ------------------------------------------------------------------
- # OPTION: -focuscommand
- #
- # Command associated upon detection of focus.
- # ------------------------------------------------------------------
- itcl::configbody iwidgets::Entryfield::focuscommand {}
-
- # ------------------------------------------------------------------
- # OPTION: -validate
- #
- # Specify a command to executed for the validation of Entryfields.
- # ------------------------------------------------------------------
- itcl::configbody iwidgets::Entryfield::validate {
- switch $itk_option(-validate) {
- {} {
- set itk_option(-validate) {}
- }
- numeric {
- set itk_option(-validate) "::iwidgets::Entryfield::numeric %c"
- }
- integer {
- set itk_option(-validate) "::iwidgets::Entryfield::integer %P"
- }
- hexidecimal {
- set itk_option(-validate) "::iwidgets::Entryfield::hexidecimal %P"
- }
- real {
- set itk_option(-validate) "::iwidgets::Entryfield::real %P"
- }
- alphabetic {
- set itk_option(-validate) "::iwidgets::Entryfield::alphabetic %c"
- }
- alphanumeric {
- set itk_option(-validate) "::iwidgets::Entryfield::alphanumeric %c"
- }
- }
- }
-
- # ------------------------------------------------------------------
- # OPTION: -invalid
- #
- # Specify a command to executed should the current Entryfield contents
- # be proven invalid.
- # ------------------------------------------------------------------
- itcl::configbody iwidgets::Entryfield::invalid {}
-
- # ------------------------------------------------------------------
- # OPTION: -pasting
- #
- # Allows the developer to enable and disable pasting into the entry
- # component of the entryfield. This is done to avoid potential stack
- # dumps when using the -validate configuration option. Plus, it's just
- # a good idea to have complete control over what you allow the user
- # to enter into the entryfield.
- # ------------------------------------------------------------------
- itcl::configbody iwidgets::Entryfield::pasting {
- set oldtags [bindtags $itk_component(entry)]
- if {[lindex $oldtags 0] != "pastetag"} {
- bindtags $itk_component(entry) [linsert $oldtags 0 pastetag]
- }
-
- if ($itk_option(-pasting)) {
- bind pastetag <ButtonRelease-2> [itcl::code $this _checkLength]
- bind pastetag <Control-v> [itcl::code $this _checkLength]
- bind pastetag <Insert> [itcl::code $this _checkLength]
- bind pastetag <KeyPress> {}
- } else {
- bind pastetag <ButtonRelease-2> {break}
- bind pastetag <Control-v> {break}
- bind pastetag <Insert> {break}
- bind pastetag <KeyPress> {
- # Disable function keys > F9.
- if {[regexp {^F[1,2][0-9]+$} "%K"]} {
- break
- }
- }
- }
- }
-
- # ------------------------------------------------------------------
- # OPTION: -fixed
- #
- # Restrict entry to 0 (unlimited) chars. The value is the maximum
- # number of chars the user may type into the field, regardles of
- # field width, i.e. the field width may be 20, but the user will
- # only be able to type -fixed number of characters into it (or
- # unlimited if -fixed = 0).
- # ------------------------------------------------------------------
- itcl::configbody iwidgets::Entryfield::fixed {
- if {[regexp {[^0-9]} $itk_option(-fixed)] || \
- ($itk_option(-fixed) < 0)} {
- error "bad fixed option \"$itk_option(-fixed)\",\
- should be positive integer"
- }
- }
-
- # ------------------------------------------------------------------
- # OPTION: -childsitepos
- #
- # Specifies the position of the child site in the widget.
- # ------------------------------------------------------------------
- itcl::configbody iwidgets::Entryfield::childsitepos {
- set parent [winfo parent $itk_component(entry)]
-
- switch $itk_option(-childsitepos) {
- n {
- grid $itk_component(efchildsite) -row 0 -column 0 -sticky ew
- grid $itk_component(entry) -row 1 -column 0 -sticky nsew
-
- grid rowconfigure $parent 0 -weight 0
- grid rowconfigure $parent 1 -weight 1
- grid columnconfigure $parent 0 -weight 1
- grid columnconfigure $parent 1 -weight 0
- }
-
- e {
- grid $itk_component(efchildsite) -row 0 -column 1 -sticky ns
- grid $itk_component(entry) -row 0 -column 0 -sticky nsew
-
- grid rowconfigure $parent 0 -weight 1
- grid rowconfigure $parent 1 -weight 0
- grid columnconfigure $parent 0 -weight 1
- grid columnconfigure $parent 1 -weight 0
- }
-
- s {
- grid $itk_component(efchildsite) -row 1 -column 0 -sticky ew
- grid $itk_component(entry) -row 0 -column 0 -sticky nsew
-
- grid rowconfigure $parent 0 -weight 1
- grid rowconfigure $parent 1 -weight 0
- grid columnconfigure $parent 0 -weight 1
- grid columnconfigure $parent 1 -weight 0
- }
-
- w {
- grid $itk_component(efchildsite) -row 0 -column 0 -sticky ns
- grid $itk_component(entry) -row 0 -column 1 -sticky nsew
-
- grid rowconfigure $parent 0 -weight 1
- grid rowconfigure $parent 1 -weight 0
- grid columnconfigure $parent 0 -weight 0
- grid columnconfigure $parent 1 -weight 1
- }
-
- default {
- error "bad childsite option\
- \"$itk_option(-childsitepos)\":\
- should be n, e, s, or w"
- }
- }
- }
-
- # ------------------------------------------------------------------
- # METHODS
- # ------------------------------------------------------------------
-
- # ------------------------------------------------------------------
- # METHOD: childsite
- #
- # Returns the path name of the child site widget.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Entryfield::childsite {} {
- return $itk_component(efchildsite)
- }
-
- # ------------------------------------------------------------------
- # METHOD: get
- #
- # Thin wrap of the standard entry widget get method.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Entryfield::get {} {
- return [$itk_component(entry) get]
- }
-
- # ------------------------------------------------------------------
- # METHOD: delete
- #
- # Thin wrap of the standard entry widget delete method.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Entryfield::delete {args} {
- return [eval $itk_component(entry) delete $args]
- }
-
- # ------------------------------------------------------------------
- # METHOD: icursor
- #
- # Thin wrap of the standard entry widget icursor method.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Entryfield::icursor {args} {
- return [eval $itk_component(entry) icursor $args]
- }
-
- # ------------------------------------------------------------------
- # METHOD: index
- #
- # Thin wrap of the standard entry widget index method.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Entryfield::index {args} {
- return [eval $itk_component(entry) index $args]
- }
-
- # ------------------------------------------------------------------
- # METHOD: insert
- #
- # Thin wrap of the standard entry widget index method.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Entryfield::insert {args} {
- return [eval $itk_component(entry) insert $args]
- }
-
- # ------------------------------------------------------------------
- # METHOD: scan
- #
- # Thin wrap of the standard entry widget scan method.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Entryfield::scan {args} {
- return [eval $itk_component(entry) scan $args]
- }
-
- # ------------------------------------------------------------------
- # METHOD: selection
- #
- # Thin wrap of the standard entry widget selection method.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Entryfield::selection {args} {
- return [eval $itk_component(entry) selection $args]
- }
-
- # ------------------------------------------------------------------
- # METHOD: xview
- #
- # Thin wrap of the standard entry widget xview method.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Entryfield::xview {args} {
- return [eval $itk_component(entry) xview $args]
- }
-
- # ------------------------------------------------------------------
- # METHOD: clear
- #
- # 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
- }
- }
- }
-