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561 lines
19 KiB
Plaintext
561 lines
19 KiB
Plaintext
15 years ago
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#
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# Selectionbox
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# ----------------------------------------------------------------------
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# Implements a selection box composed of a scrolled list of items and
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# a selection entry field. The user may choose any of the items displayed
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# in the scrolled list of alternatives and the selection field will be
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# filled with the choice. The user is also free to enter a new value in
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# the selection entry field. Both the list and entry areas have labels.
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# A child site is also provided in which the user may create other widgets
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# to be used in conjunction with the selection box.
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#
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# ----------------------------------------------------------------------
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# AUTHOR: Mark L. Ulferts EMAIL: mulferts@austin.dsccc.com
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#
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# @(#) $Id: selectionbox.itk,v 1.2 2001/08/07 19:56:48 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 Selectionbox {
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keep -activebackground -activerelief -background -borderwidth -cursor \
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-elementborderwidth -foreground -highlightcolor -highlightthickness \
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-insertbackground -insertborderwidth -insertofftime -insertontime \
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-insertwidth -jump -labelfont -selectbackground -selectborderwidth \
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-selectforeground -textbackground -textfont -troughcolor
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}
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# ------------------------------------------------------------------
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# SELECTIONBOX
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# ------------------------------------------------------------------
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itcl::class iwidgets::Selectionbox {
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inherit itk::Widget
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constructor {args} {}
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destructor {}
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itk_option define -childsitepos childSitePos Position center
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itk_option define -margin margin Margin 7
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itk_option define -itemson itemsOn ItemsOn true
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itk_option define -selectionon selectionOn SelectionOn true
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itk_option define -width width Width 260
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itk_option define -height height Height 320
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public method childsite {}
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public method get {}
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public method curselection {}
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public method clear {component}
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public method insert {component index args}
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public method delete {first {last {}}}
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public method size {}
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public method scan {option args}
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public method nearest {y}
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public method index {index}
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public method selection {option args}
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public method selectitem {}
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private method _packComponents {{when later}}
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private variable _repacking {} ;# non-null => _packComponents pending
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}
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#
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# Provide a lowercased access method for the Selectionbox class.
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#
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proc ::iwidgets::selectionbox {pathName args} {
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uplevel ::iwidgets::Selectionbox $pathName $args
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}
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#
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# Use option database to override default resources of base classes.
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#
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option add *Selectionbox.itemsLabel Items widgetDefault
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option add *Selectionbox.selectionLabel Selection widgetDefault
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option add *Selectionbox.width 260 widgetDefault
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option add *Selectionbox.height 320 widgetDefault
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# ------------------------------------------------------------------
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# CONSTRUCTOR
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# ------------------------------------------------------------------
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itcl::body iwidgets::Selectionbox::constructor {args} {
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#
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# Set the borderwidth to zero and add width and height options
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# back to the hull.
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#
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component hull configure -borderwidth 0
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itk_option add hull.width hull.height
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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 sbchildsite {
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frame $itk_interior.sbchildsite
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}
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#
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# Create the items list.
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#
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itk_component add items {
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iwidgets::Scrolledlistbox $itk_interior.items -selectmode single \
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-visibleitems 20x10 -labelpos nw -vscrollmode static \
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-hscrollmode none
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} {
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usual
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keep -dblclickcommand -exportselection
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rename -labeltext -itemslabel itemsLabel Text
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rename -selectioncommand -itemscommand itemsCommand Command
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}
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configure -itemscommand [itcl::code $this selectitem]
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#
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# Create the selection entry.
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#
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itk_component add selection {
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iwidgets::Entryfield $itk_interior.selection -labelpos nw
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} {
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usual
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keep -exportselection
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rename -labeltext -selectionlabel selectionLabel Text
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rename -command -selectioncommand selectionCommand Command
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}
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#
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# Set the interior to the childsite for derived classes.
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#
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set itk_interior $itk_component(sbchildsite)
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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 $args
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#
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# When idle, pack the components.
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#
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_packComponents
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}
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# ------------------------------------------------------------------
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# DESTRUCTOR
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# ------------------------------------------------------------------
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itcl::body iwidgets::Selectionbox::destructor {} {
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if {$_repacking != ""} {after cancel $_repacking}
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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: -childsitepos
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#
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# Specifies the position of the child site in the selection box.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Selectionbox::childsitepos {
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_packComponents
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}
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# ------------------------------------------------------------------
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# OPTION: -margin
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#
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# Specifies distance between the items list and selection entry.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Selectionbox::margin {
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_packComponents
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}
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# ------------------------------------------------------------------
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# OPTION: -itemson
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#
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# Specifies whether or not to display the items list.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Selectionbox::itemson {
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_packComponents
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}
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# ------------------------------------------------------------------
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# OPTION: -selectionon
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#
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# Specifies whether or not to display the selection entry widget.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Selectionbox::selectionon {
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_packComponents
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}
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# ------------------------------------------------------------------
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# OPTION: -width
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#
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# Specifies the width of the hull. The value may be specified in
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# any of the forms acceptable to Tk_GetPixels. A value of zero
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# causes the width to be adjusted to the required value based on
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# the size requests of the components. Otherwise, the width is
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# fixed.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Selectionbox::width {
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#
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# The width option was added to the hull in the constructor.
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# So, any width value given is passed automatically to the
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# hull. All we have to do is play with the propagation.
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#
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if {$itk_option(-width) != 0} {
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set propagate 0
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} else {
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set propagate 1
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}
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#
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# Due to a bug in the tk4.2 grid, we have to check the
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# propagation before setting it. Setting it to the same
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# value it already is will cause it to toggle.
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#
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if {[grid propagate $itk_component(hull)] != $propagate} {
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grid propagate $itk_component(hull) $propagate
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}
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}
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# ------------------------------------------------------------------
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# OPTION: -height
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#
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# Specifies the height of the hull. The value may be specified in
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# any of the forms acceptable to Tk_GetPixels. A value of zero
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# causes the height to be adjusted to the required value based on
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# the size requests of the components. Otherwise, the height is
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# fixed.
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# ------------------------------------------------------------------
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itcl::configbody iwidgets::Selectionbox::height {
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#
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# The height option was added to the hull in the constructor.
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# So, any height value given is passed automatically to the
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# hull. All we have to do is play with the propagation.
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#
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if {$itk_option(-height) != 0} {
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set propagate 0
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} else {
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set propagate 1
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}
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#
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# Due to a bug in the tk4.2 grid, we have to check the
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# propagation before setting it. Setting it to the same
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# value it already is will cause it to toggle.
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#
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if {[grid propagate $itk_component(hull)] != $propagate} {
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grid propagate $itk_component(hull) $propagate
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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::Selectionbox::childsite {} {
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return $itk_component(sbchildsite)
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}
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# ------------------------------------------------------------------
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# METHOD: get
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#
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# Returns the current selection.
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# ------------------------------------------------------------------
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itcl::body iwidgets::Selectionbox::get {} {
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return [$itk_component(selection) get]
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}
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# ------------------------------------------------------------------
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# METHOD: curselection
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#
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# Returns the current selection index.
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# ------------------------------------------------------------------
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itcl::body iwidgets::Selectionbox::curselection {} {
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return [$itk_component(items) curselection]
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}
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# ------------------------------------------------------------------
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# METHOD: clear component
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#
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# Delete the contents of either the selection entry widget or items
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# list.
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# ------------------------------------------------------------------
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itcl::body iwidgets::Selectionbox::clear {component} {
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switch $component {
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selection {
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$itk_component(selection) clear
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}
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items {
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delete 0 end
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}
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default {
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error "bad clear argument \"$component\": should be\
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selection or items"
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}
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}
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}
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# ------------------------------------------------------------------
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# METHOD: insert component index args
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#
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# Insert element(s) into either the selection or items list widget.
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# ------------------------------------------------------------------
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itcl::body iwidgets::Selectionbox::insert {component index args} {
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switch $component {
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selection {
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eval $itk_component(selection) insert $index $args
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}
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items {
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eval $itk_component(items) insert $index $args
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}
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default {
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error "bad insert argument \"$component\": should be\
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selection or items"
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}
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}
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}
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# ------------------------------------------------------------------
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# METHOD: delete first ?last?
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#
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# Delete one or more elements from the items list box. The default
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# is to delete by indexed range. If an item is to be removed by name,
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# it must be preceeded by the keyword "item". Only index numbers can
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# be used to delete a range of items.
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# ------------------------------------------------------------------
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itcl::body iwidgets::Selectionbox::delete {first {last {}}} {
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set first [index $first]
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if {$last != {}} {
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set last [index $last]
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} else {
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set last $first
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}
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if {$first <= $last} {
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eval $itk_component(items) delete $first $last
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} else {
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error "first index must not be greater than second"
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}
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}
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# ------------------------------------------------------------------
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# METHOD: size
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#
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# Returns a decimal string indicating the total number of elements
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# in the items list.
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# ------------------------------------------------------------------
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itcl::body iwidgets::Selectionbox::size {} {
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return [$itk_component(items) size]
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}
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# ------------------------------------------------------------------
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# METHOD: scan option args
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#
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# Implements scanning on items list.
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# ------------------------------------------------------------------
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itcl::body iwidgets::Selectionbox::scan {option args} {
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eval $itk_component(items) scan $option $args
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}
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# ------------------------------------------------------------------
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# METHOD: nearest y
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#
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# Returns the index to the nearest listbox item given a y coordinate.
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# ------------------------------------------------------------------
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itcl::body iwidgets::Selectionbox::nearest {y} {
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return [$itk_component(items) nearest $y]
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}
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# ------------------------------------------------------------------
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# METHOD: index index
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#
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# Returns the decimal string giving the integer index corresponding
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# to index.
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
itcl::body iwidgets::Selectionbox::index {index} {
|
||
|
|
return [$itk_component(items) index $index]
|
||
|
|
}
|
||
|
|
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
# METHOD: selection option args
|
||
|
|
#
|
||
|
|
# Adjusts the selection within the items list.
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
itcl::body iwidgets::Selectionbox::selection {option args} {
|
||
|
|
eval $itk_component(items) selection $option $args
|
||
|
|
|
||
|
|
selectitem
|
||
|
|
}
|
||
|
|
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
# METHOD: selectitem
|
||
|
|
#
|
||
|
|
# Replace the selection entry field contents with the currently
|
||
|
|
# selected items value.
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
itcl::body iwidgets::Selectionbox::selectitem {} {
|
||
|
|
$itk_component(selection) clear
|
||
|
|
set numSelected [$itk_component(items) selecteditemcount]
|
||
|
|
|
||
|
|
if {$numSelected == 1} {
|
||
|
|
$itk_component(selection) insert end \
|
||
|
|
[$itk_component(items) getcurselection]
|
||
|
|
} elseif {$numSelected > 1} {
|
||
|
|
$itk_component(selection) insert end \
|
||
|
|
[lindex [$itk_component(items) getcurselection] 0]
|
||
|
|
}
|
||
|
|
|
||
|
|
$itk_component(selection) icursor end
|
||
|
|
}
|
||
|
|
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
# PRIVATE METHOD: _packComponents ?when?
|
||
|
|
#
|
||
|
|
# Pack the selection, items, and child site widgets based on options.
|
||
|
|
# If "when" is "now", the change is applied immediately. If it is
|
||
|
|
# "later" or it is not specified, then the change is applied later,
|
||
|
|
# when the application is idle.
|
||
|
|
# ------------------------------------------------------------------
|
||
|
|
itcl::body iwidgets::Selectionbox::_packComponents {{when later}} {
|
||
|
|
if {$when == "later"} {
|
||
|
|
if {$_repacking == ""} {
|
||
|
|
set _repacking [after idle [itcl::code $this _packComponents now]]
|
||
|
|
}
|
||
|
|
return
|
||
|
|
} elseif {$when != "now"} {
|
||
|
|
error "bad option \"$when\": should be now or later"
|
||
|
|
}
|
||
|
|
|
||
|
|
set _repacking ""
|
||
|
|
|
||
|
|
set parent [winfo parent $itk_component(sbchildsite)]
|
||
|
|
set margin [winfo pixels $itk_component(hull) $itk_option(-margin)]
|
||
|
|
|
||
|
|
switch $itk_option(-childsitepos) {
|
||
|
|
n {
|
||
|
|
grid $itk_component(sbchildsite) -row 0 -column 0 \
|
||
|
|
-sticky nsew -rowspan 1
|
||
|
|
grid $itk_component(items) -row 1 -column 0 -sticky nsew
|
||
|
|
grid $itk_component(selection) -row 3 -column 0 -sticky ew
|
||
|
|
|
||
|
|
grid rowconfigure $parent 0 -weight 0 -minsize 0
|
||
|
|
grid rowconfigure $parent 1 -weight 1 -minsize 0
|
||
|
|
grid rowconfigure $parent 2 -weight 0 -minsize $margin
|
||
|
|
grid rowconfigure $parent 3 -weight 0 -minsize 0
|
||
|
|
|
||
|
|
grid columnconfigure $parent 0 -weight 1 -minsize 0
|
||
|
|
grid columnconfigure $parent 1 -weight 0 -minsize 0
|
||
|
|
}
|
||
|
|
|
||
|
|
w {
|
||
|
|
grid $itk_component(sbchildsite) -row 0 -column 0 \
|
||
|
|
-sticky nsew -rowspan 3
|
||
|
|
grid $itk_component(items) -row 0 -column 1 -sticky nsew
|
||
|
|
grid $itk_component(selection) -row 2 -column 1 -sticky ew
|
||
|
|
|
||
|
|
grid rowconfigure $parent 0 -weight 1 -minsize 0
|
||
|
|
grid rowconfigure $parent 1 -weight 0 -minsize $margin
|
||
|
|
grid rowconfigure $parent 2 -weight 0 -minsize 0
|
||
|
|
grid rowconfigure $parent 3 -weight 0 -minsize 0
|
||
|
|
|
||
|
|
grid columnconfigure $parent 0 -weight 0 -minsize 0
|
||
|
|
grid columnconfigure $parent 1 -weight 1 -minsize 0
|
||
|
|
}
|
||
|
|
|
||
|
|
s {
|
||
|
|
grid $itk_component(items) -row 0 -column 0 -sticky nsew
|
||
|
|
grid $itk_component(selection) -row 2 -column 0 -sticky ew
|
||
|
|
grid $itk_component(sbchildsite) -row 3 -column 0 \
|
||
|
|
-sticky nsew -rowspan 1
|
||
|
|
|
||
|
|
grid rowconfigure $parent 0 -weight 1 -minsize 0
|
||
|
|
grid rowconfigure $parent 1 -weight 0 -minsize $margin
|
||
|
|
grid rowconfigure $parent 2 -weight 0 -minsize 0
|
||
|
|
grid rowconfigure $parent 3 -weight 0 -minsize 0
|
||
|
|
|
||
|
|
grid columnconfigure $parent 0 -weight 1 -minsize 0
|
||
|
|
grid columnconfigure $parent 1 -weight 0 -minsize 0
|
||
|
|
}
|
||
|
|
|
||
|
|
e {
|
||
|
|
grid $itk_component(items) -row 0 -column 0 -sticky nsew
|
||
|
|
grid $itk_component(selection) -row 2 -column 0 -sticky ew
|
||
|
|
grid $itk_component(sbchildsite) -row 0 -column 1 \
|
||
|
|
-sticky nsew -rowspan 3
|
||
|
|
|
||
|
|
grid rowconfigure $parent 0 -weight 1 -minsize 0
|
||
|
|
grid rowconfigure $parent 1 -weight 0 -minsize $margin
|
||
|
|
grid rowconfigure $parent 2 -weight 0 -minsize 0
|
||
|
|
grid rowconfigure $parent 3 -weight 0 -minsize 0
|
||
|
|
|
||
|
|
grid columnconfigure $parent 0 -weight 1 -minsize 0
|
||
|
|
grid columnconfigure $parent 1 -weight 0 -minsize 0
|
||
|
|
}
|
||
|
|
|
||
|
|
center {
|
||
|
|
grid $itk_component(items) -row 0 -column 0 -sticky nsew
|
||
|
|
grid $itk_component(sbchildsite) -row 1 -column 0 \
|
||
|
|
-sticky nsew -rowspan 1
|
||
|
|
grid $itk_component(selection) -row 3 -column 0 -sticky ew
|
||
|
|
|
||
|
|
grid rowconfigure $parent 0 -weight 1 -minsize 0
|
||
|
|
grid rowconfigure $parent 1 -weight 0 -minsize 0
|
||
|
|
grid rowconfigure $parent 2 -weight 0 -minsize $margin
|
||
|
|
grid rowconfigure $parent 3 -weight 0 -minsize 0
|
||
|
|
|
||
|
|
grid columnconfigure $parent 0 -weight 1 -minsize 0
|
||
|
|
grid columnconfigure $parent 1 -weight 0 -minsize 0
|
||
|
|
}
|
||
|
|
|
||
|
|
default {
|
||
|
|
error "bad childsitepos option \"$itk_option(-childsitepos)\":\
|
||
|
|
should be n, e, s, w, or center"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if {$itk_option(-itemson)} {
|
||
|
|
} else {
|
||
|
|
grid forget $itk_component(items)
|
||
|
|
}
|
||
|
|
|
||
|
|
if {$itk_option(-selectionon)} {
|
||
|
|
} else {
|
||
|
|
grid forget $itk_component(selection)
|
||
|
|
}
|
||
|
|
|
||
|
|
raise $itk_component(sbchildsite)
|
||
|
|
}
|
||
|
|
|