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- #
- # Scrolledtext
- # ----------------------------------------------------------------------
- # Implements a scrolled text widget with additional options to manage
- # the vertical scrollbar. This includes options to control the method
- # in which the scrollbar is displayed, i.e. statically or dynamically.
- # Options also exist for adding a label to the scrolled text area and
- # controlling its position. Import/export of methods are provided for
- # file I/O.
- #
- # ----------------------------------------------------------------------
- # AUTHOR: Mark L. Ulferts EMAIL: mulferts@austin.dsccc.com
- #
- # @(#) $Id: scrolledtext.itk,v 1.5 2002/09/10 03:05:25 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 Scrolledtext {
- keep -activebackground -activerelief -background -borderwidth -cursor \
- -elementborderwidth -foreground -highlightcolor -highlightthickness \
- -insertbackground -insertborderwidth -insertofftime -insertontime \
- -insertwidth -jump -labelfont -selectbackground -selectborderwidth \
- -selectforeground -textbackground -textfont -troughcolor
- }
-
- # ------------------------------------------------------------------
- # SCROLLEDTEXT
- # ------------------------------------------------------------------
- itcl::class iwidgets::Scrolledtext {
- inherit iwidgets::Scrolledwidget
-
- constructor {args} {}
- destructor {}
-
- itk_option define -width width Width 0
- itk_option define -height height Height 0
- itk_option define -visibleitems visibleItems VisibleItems 80x24
-
- public method bbox {index}
- public method childsite {}
- public method clear {}
- public method import {filename {index end}}
- public method export {filename}
- public method compare {index1 op index2}
- public method debug {args}
- public method delete {first {last {}}}
- public method dlineinfo {index}
- public method get {index1 {index2 {}}}
- public method image {option args}
- public method index {index}
- public method insert {args}
- public method mark {option args}
- public method scan {option args}
- public method search {args}
- public method see {index}
- public method tag {option args}
- public method window {option args}
- public method xview {args}
- public method yview {args}
- }
-
- #
- # Provide a lowercased access method for the Scrolledtext class.
- #
- proc ::iwidgets::scrolledtext {pathName args} {
- uplevel ::iwidgets::Scrolledtext $pathName $args
- }
-
- #
- # Use option database to override default resources of base classes.
- #
- option add *Scrolledtext.labelPos n widgetDefault
-
- # ------------------------------------------------------------------
- # CONSTRUCTOR
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::constructor {args} {
- #
- # Our -width and -height options are slightly different than
- # those implemented by our base class, so we're going to
- # remove them and redefine our own.
- #
- itk_option remove iwidgets::Scrolledwidget::width
- itk_option remove iwidgets::Scrolledwidget::height
-
- #
- # Create a clipping frame which will provide the border for
- # relief display.
- #
- itk_component add clipper {
- frame $itk_interior.clipper
- } {
- usual
-
- keep -borderwidth -relief -highlightthickness -highlightcolor
- rename -highlightbackground -background background Background
- }
- grid $itk_component(clipper) -row 0 -column 0 -sticky nsew
- grid rowconfigure $_interior 0 -weight 1
- grid columnconfigure $_interior 0 -weight 1
-
- #
- # Create the text area.
- #
- itk_component add text {
- text $itk_component(clipper).text \
- -width 1 -height 1 \
- -xscrollcommand \
- [itcl::code $this _scrollWidget $itk_interior.horizsb] \
- -yscrollcommand \
- [itcl::code $this _scrollWidget $itk_interior.vertsb] \
- -borderwidth 0 -highlightthickness 0
- } {
- usual
-
- ignore -highlightthickness -highlightcolor -borderwidth
-
- keep -exportselection -padx -pady -setgrid \
- -spacing1 -spacing2 -spacing3 -state -tabs -wrap
-
- rename -font -textfont textFont Font
- rename -background -textbackground textBackground Background
- }
- grid $itk_component(text) -row 0 -column 0 -sticky nsew
- grid rowconfigure $itk_component(clipper) 0 -weight 1
- grid columnconfigure $itk_component(clipper) 0 -weight 1
-
- #
- # Configure the command on the vertical scroll bar in the base class.
- #
- $itk_component(vertsb) configure \
- -command [itcl::code $itk_component(text) yview]
-
- #
- # Configure the command on the horizontal scroll bar in the base class.
- #
- $itk_component(horizsb) configure \
- -command [itcl::code $itk_component(text) xview]
-
- #
- # Initialize the widget based on the command line options.
- #
- eval itk_initialize $args
- }
-
- # ------------------------------------------------------------------
- # DESTURCTOR
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::destructor {} {
- }
-
- # ------------------------------------------------------------------
- # OPTIONS
- # ------------------------------------------------------------------
-
- # ------------------------------------------------------------------
- # OPTION: -width
- #
- # Specifies the width of the scrolled text as an entire unit.
- # The value may be specified in any of the forms acceptable to
- # Tk_GetPixels. Any additional space needed to display the other
- # components such as labels, margins, and scrollbars force the text
- # to be compressed. A value of zero along with the same value for
- # the height causes the value given for the visibleitems option
- # to be applied which administers geometry constraints in a different
- # manner.
- # ------------------------------------------------------------------
- itcl::configbody iwidgets::Scrolledtext::width {
- if {$itk_option(-width) != 0} {
- set shell [lindex [grid info $itk_component(clipper)] 1]
-
- #
- # Due to a bug in the tk4.2 grid, we have to check the
- # propagation before setting it. Setting it to the same
- # value it already is will cause it to toggle.
- #
- if {[grid propagate $shell]} {
- grid propagate $shell no
- }
-
- $itk_component(text) configure -width 1
- $shell configure \
- -width [winfo pixels $shell $itk_option(-width)]
- } else {
- configure -visibleitems $itk_option(-visibleitems)
- }
- }
-
- # ------------------------------------------------------------------
- # OPTION: -height
- #
- # Specifies the height of the scrolled text as an entire unit.
- # The value may be specified in any of the forms acceptable to
- # Tk_GetPixels. Any additional space needed to display the other
- # components such as labels, margins, and scrollbars force the text
- # to be compressed. A value of zero along with the same value for
- # the width causes the value given for the visibleitems option
- # to be applied which administers geometry constraints in a different
- # manner.
- # ------------------------------------------------------------------
- itcl::configbody iwidgets::Scrolledtext::height {
- if {$itk_option(-height) != 0} {
- set shell [lindex [grid info $itk_component(clipper)] 1]
-
- #
- # Due to a bug in the tk4.2 grid, we have to check the
- # propagation before setting it. Setting it to the same
- # value it already is will cause it to toggle.
- #
- if {[grid propagate $shell]} {
- grid propagate $shell no
- }
-
- $itk_component(text) configure -height 1
- $shell configure \
- -height [winfo pixels $shell $itk_option(-height)]
- } else {
- configure -visibleitems $itk_option(-visibleitems)
- }
- }
-
- # ------------------------------------------------------------------
- # OPTION: -visibleitems
- #
- # Specified the widthxheight in characters and lines for the text.
- # This option is only administered if the width and height options
- # are both set to zero, otherwise they take precedence. With the
- # visibleitems option engaged, geometry constraints are maintained
- # only on the text. The size of the other components such as
- # labels, margins, and scroll bars, are additive and independent,
- # effecting the overall size of the scrolled text. In contrast,
- # should the width and height options have non zero values, they
- # are applied to the scrolled text as a whole. The text is
- # compressed or expanded to maintain the geometry constraints.
- # ------------------------------------------------------------------
- itcl::configbody iwidgets::Scrolledtext::visibleitems {
- if {[regexp {^[0-9]+x[0-9]+$} $itk_option(-visibleitems)]} {
- if {($itk_option(-width) == 0) && \
- ($itk_option(-height) == 0)} {
- set chars [lindex [split $itk_option(-visibleitems) x] 0]
- set lines [lindex [split $itk_option(-visibleitems) x] 1]
-
- set shell [lindex [grid info $itk_component(clipper)] 1]
-
- #
- # Due to a bug in the tk4.2 grid, we have to check the
- # propagation before setting it. Setting it to the same
- # value it already is will cause it to toggle.
- #
- if {! [grid propagate $shell]} {
- grid propagate $shell yes
- }
-
- $itk_component(text) configure -width $chars -height $lines
- }
-
- } else {
- error "bad visibleitems option\
- \"$itk_option(-visibleitems)\": should be\
- widthxheight"
- }
- }
-
- # ------------------------------------------------------------------
- # METHODS
- # ------------------------------------------------------------------
-
- # ------------------------------------------------------------------
- # METHOD: childsite
- #
- # Returns the path name of the child site widget.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::childsite {} {
- return $itk_component(text)
- }
-
- # ------------------------------------------------------------------
- # METHOD: bbox index
- #
- # Returns four element list describing the bounding box for the list
- # item at index
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::bbox {index} {
- return [$itk_component(text) bbox $index]
- }
-
- # ------------------------------------------------------------------
- # METHOD clear
- #
- # Clear the text area.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::clear {} {
- $itk_component(text) delete 1.0 end
- }
-
- # ------------------------------------------------------------------
- # METHOD import filename
- #
- # Load text from an existing file (import filename)
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::import {filename {index end}} {
- set f [open $filename r]
- insert $index [read $f]
- close $f
- }
-
- # ------------------------------------------------------------------
- # METHOD export filename
- #
- # write text to a file (export filename)
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::export {filename} {
- set f [open $filename w]
-
- set txt [$itk_component(text) get 1.0 end]
- puts $f $txt
-
- flush $f
- close $f
- }
-
- # ------------------------------------------------------------------
- # METHOD compare index1 op index2
- #
- # Compare indices according to relational operator.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::compare {index1 op index2} {
- return [$itk_component(text) compare $index1 $op $index2]
- }
-
- # ------------------------------------------------------------------
- # METHOD debug ?boolean?
- #
- # Activates consistency checks in B-tree code associated with text
- # widgets.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::debug {args} {
- eval $itk_component(text) debug $args
- }
-
- # ------------------------------------------------------------------
- # METHOD delete first ?last?
- #
- # Delete a range of characters from the text.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::delete {first {last {}}} {
- $itk_component(text) delete $first $last
- }
-
- # ------------------------------------------------------------------
- # METHOD dlineinfo index
- #
- # Returns a five element list describing the area occupied by the
- # display line containing index.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::dlineinfo {index} {
- return [$itk_component(text) dlineinfo $index]
- }
-
- # ------------------------------------------------------------------
- # METHOD get index1 ?index2?
- #
- # Return text from start index to end index.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::get {index1 {index2 {}}} {
- return [$itk_component(text) get $index1 $index2]
- }
-
- # ------------------------------------------------------------------
- # METHOD image option ?arg arg ...?
- #
- # Manipulate images dependent on options.
- #
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::image {option args} {
- return [eval $itk_component(text) image $option $args]
- }
-
-
- # ------------------------------------------------------------------
- # METHOD index index
- #
- # Return position corresponding to index.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::index {index} {
- return [$itk_component(text) index $index]
- }
-
- # ------------------------------------------------------------------
- # METHOD insert index chars ?tagList?
- #
- # Insert text at index.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::insert {args} {
- eval $itk_component(text) insert $args
- }
-
- # ------------------------------------------------------------------
- # METHOD mark option ?arg arg ...?
- #
- # Manipulate marks dependent on options.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::mark {option args} {
- return [eval $itk_component(text) mark $option $args]
- }
-
- # ------------------------------------------------------------------
- # METHOD scan option args
- #
- # Implements scanning on texts.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::scan {option args} {
- eval $itk_component(text) scan $option $args
- }
-
- # ------------------------------------------------------------------
- # METHOD search ?switches? pattern index ?varName?
- #
- # Searches the text for characters matching a pattern.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::search {args} {
- #-----------------------------------------------------------
- # BUG FIX: csmith (Chad Smith: csmith@adc.com), 11/18/99
- #-----------------------------------------------------------
- # Need to run this command up one level on the stack since
- # the text widget may modify one of the arguments, which is
- # the case when -count is specified.
- #-----------------------------------------------------------
- return [uplevel eval $itk_component(text) search $args]
- }
-
- # ------------------------------------------------------------------
- # METHOD see index
- #
- # Adjusts the view in the window so the character at index is
- # visible.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::see {index} {
- $itk_component(text) see $index
- }
-
- # ------------------------------------------------------------------
- # METHOD tag option ?arg arg ...?
- #
- # Manipulate tags dependent on options.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::tag {option args} {
- return [eval $itk_component(text) tag $option $args]
- }
-
- # ------------------------------------------------------------------
- # METHOD window option ?arg arg ...?
- #
- # Manipulate embedded windows.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::window {option args} {
- return [eval $itk_component(text) window $option $args]
- }
-
- # ------------------------------------------------------------------
- # METHOD xview
- #
- # Changes x view in widget's window.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::xview {args} {
- return [eval $itk_component(text) xview $args]
- }
-
- # ------------------------------------------------------------------
- # METHOD yview
- #
- # Changes y view in widget's window.
- # ------------------------------------------------------------------
- itcl::body iwidgets::Scrolledtext::yview {args} {
- return [eval $itk_component(text) yview $args]
- }
-
-