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#
# Buttonbox
# ----------------------------------------------------------------------
# Manages a framed area with Motif style buttons. The button box can
# be configured either horizontally or vertically.
#
# ----------------------------------------------------------------------
# AUTHOR: Mark L. Ulferts EMAIL: mulferts@austin.dsccc.com
# Bret A. Schuhmacher EMAIL: bas@wn.com
#
# @(#) $Id: buttonbox.itk,v 1.3 2001/08/15 18:30:53 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 Buttonbox {
keep -background -cursor -foreground
}
# ------------------------------------------------------------------
# BUTTONBOX
# ------------------------------------------------------------------
itcl::class iwidgets::Buttonbox {
inherit itk::Widget
constructor {args} {}
destructor {}
itk_option define -pady padY Pad 5
itk_option define -padx padX Pad 5
itk_option define -orient orient Orient "horizontal"
itk_option define -foreground foreground Foreground black
public method index {args}
public method add {args}
public method insert {args}
public method delete {args}
public method default {args}
public method hide {args}
public method show {args}
public method invoke {args}
public method buttonconfigure {args}
public method buttoncget {index option}
private method _positionButtons {}
private method _setBoxSize {{when later}}
private method _getMaxWidth {}
private method _getMaxHeight {}
private variable _resizeFlag {} ;# Flag for resize needed.
private variable _buttonList {} ;# List of all buttons in box.
private variable _displayList {} ;# List of displayed buttons.
private variable _unique 0 ;# Counter for button widget ids.
}
namespace eval iwidgets::Buttonbox {
#
# Set up some class level bindings for map and configure events.
#
bind bbox-map <Map> [itcl::code %W _setBoxSize]
bind bbox-config <Configure> [itcl::code %W _positionButtons]
}
#
# Provide a lowercased access method for the Buttonbox class.
#
proc ::iwidgets::buttonbox {pathName args} {
uplevel ::iwidgets::Buttonbox $pathName $args
}
# ------------------------------------------------------------------
# CONSTRUCTOR
# ------------------------------------------------------------------
itcl::body iwidgets::Buttonbox::constructor {args} {
#
# Add Configure bindings for geometry management.
#
bindtags $itk_component(hull) \
[linsert [bindtags $itk_component(hull)] 0 bbox-map]
bindtags $itk_component(hull) \
[linsert [bindtags $itk_component(hull)] 1 bbox-config]
pack propagate $itk_component(hull) no
#
# Initialize the widget based on the command line options.
#
eval itk_initialize $args
}
# ------------------------------------------------------------------
# DESTRUCTOR
# ------------------------------------------------------------------
itcl::body iwidgets::Buttonbox::destructor {} {
if {$_resizeFlag != ""} {after cancel $_resizeFlag}
}
# ------------------------------------------------------------------
# OPTIONS
# ------------------------------------------------------------------
# ------------------------------------------------------------------
# OPTION: -pady
#
# Pad the y space between the button box frame and the hull.
# ------------------------------------------------------------------
itcl::configbody iwidgets::Buttonbox::pady {
_setBoxSize
}
# ------------------------------------------------------------------
# OPTION: -padx
#
# Pad the x space between the button box frame and the hull.
# ------------------------------------------------------------------
itcl::configbody iwidgets::Buttonbox::padx {
_setBoxSize
}
# ------------------------------------------------------------------
# OPTION: -orient
#
# Position buttons either horizontally or vertically.
# ------------------------------------------------------------------
itcl::configbody iwidgets::Buttonbox::orient {
switch $itk_option(-orient) {
"horizontal" -
"vertical" {
_setBoxSize
}
default {
error "bad orientation option \"$itk_option(-orient)\",\
should be either horizontal or vertical"
}
}
}
# ------------------------------------------------------------------
# METHODS
# ------------------------------------------------------------------
# ------------------------------------------------------------------
# METHOD: index index
#
# Searches the buttons in the box for the one with the requested tag,
# numerical index, keyword "end" or "default". Returns the button's
# tag if found, otherwise error.
# ------------------------------------------------------------------
itcl::body iwidgets::Buttonbox::index {index} {
if {[llength $_buttonList] > 0} {
if {[regexp {(^[0-9]+$)} $index]} {
if {$index < [llength $_buttonList]} {
return $index
} else {
error "Buttonbox index \"$index\" is out of range"
}
} elseif {$index == "end"} {
return [expr {[llength $_buttonList] - 1}]
} elseif {$index == "default"} {
foreach knownButton $_buttonList {
if {[$itk_component($knownButton) cget -defaultring]} {
return [lsearch -exact $_buttonList $knownButton]
}
}
error "Buttonbox \"$itk_component(hull)\" has no default"
} else {
if {[set idx [lsearch $_buttonList $index]] != -1} {
return $idx
}
error "bad Buttonbox index \"$index\": must be number, end,\
default, or pattern"
}
} else {
error "Buttonbox \"$itk_component(hull)\" has no buttons"
}
}
# ------------------------------------------------------------------
# METHOD: add tag ?option value option value ...?
#
# Add the specified button to the button box. All PushButton options
# are allowed. New buttons are added to the list of buttons and the
# list of displayed buttons. The PushButton path name is returned.
# ------------------------------------------------------------------
itcl::body iwidgets::Buttonbox::add {tag args} {
itk_component add $tag {
iwidgets::Pushbutton $itk_component(hull).[incr _unique]
} {
usual
rename -highlightbackground -background background Background
}
if {$args != ""} {
uplevel $itk_component($tag) configure $args
}
lappend _buttonList $tag
lappend _displayList $tag
_setBoxSize
}
# ------------------------------------------------------------------
# METHOD: insert index tag ?option value option value ...?
#
# Insert the specified button in the button box just before the one
# given by index. All PushButton options are allowed. New buttons
# are added to the list of buttons and the list of displayed buttons.
# The PushButton path name is returned.
# ------------------------------------------------------------------
itcl::body iwidgets::Buttonbox::insert {index tag args} {
itk_component add $tag {
iwidgets::Pushbutton $itk_component(hull).[incr _unique]
} {
usual
rename -highlightbackground -background background Background
}
if {$args != ""} {
uplevel $itk_component($tag) configure $args
}
set index [index $index]
set _buttonList [linsert $_buttonList $index $tag]
set _displayList [linsert $_displayList $index $tag]
_setBoxSize
}
# ------------------------------------------------------------------
# METHOD: delete index
#
# Delete the specified button from the button box.
# ------------------------------------------------------------------
itcl::body iwidgets::Buttonbox::delete {index} {
set index [index $index]
set tag [lindex $_buttonList $index]
destroy $itk_component($tag)
set _buttonList [lreplace $_buttonList $index $index]
if {[set dind [lsearch $_displayList $tag]] != -1} {
set _displayList [lreplace $_displayList $dind $dind]
}
_setBoxSize
update idletasks
}
# ------------------------------------------------------------------
# METHOD: default index
#
# Sets the default to the push button given by index.
# ------------------------------------------------------------------
itcl::body iwidgets::Buttonbox::default {index} {
set index [index $index]
set defbtn [lindex $_buttonList $index]
foreach knownButton $_displayList {
if {$knownButton == $defbtn} {
$itk_component($knownButton) configure -defaultring yes
} else {
$itk_component($knownButton) configure -defaultring no
}
}
}
# ------------------------------------------------------------------
# METHOD: hide index
#
# Hide the push button given by index. This doesn't remove the button
# permanently from the display list, just inhibits its display.
# ------------------------------------------------------------------
itcl::body iwidgets::Buttonbox::hide {index} {
set index [index $index]
set tag [lindex $_buttonList $index]
if {[set dind [lsearch $_displayList $tag]] != -1} {
place forget $itk_component($tag)
set _displayList [lreplace $_displayList $dind $dind]
_setBoxSize
}
}
# ------------------------------------------------------------------
# METHOD: show index
#
# Displays a previously hidden push button given by index. Check if
# the button is already in the display list. If not then add it back
# at it's original location and redisplay.
# ------------------------------------------------------------------
itcl::body iwidgets::Buttonbox::show {index} {
set index [index $index]
set tag [lindex $_buttonList $index]
if {[lsearch $_displayList $tag] == -1} {
set _displayList [linsert $_displayList $index $tag]
_setBoxSize
}
}
# ------------------------------------------------------------------
# METHOD: invoke ?index?
#
# Invoke the command associated with a push button. If no arguments
# are given then the default button is invoked, otherwise the argument
# is expected to be a button index.
# ------------------------------------------------------------------
itcl::body iwidgets::Buttonbox::invoke {args} {
if {[llength $args] == 0} {
$itk_component([lindex $_buttonList [index default]]) invoke
} else {
$itk_component([lindex $_buttonList [index [lindex $args 0]]]) \
invoke
}
}
# ------------------------------------------------------------------
# METHOD: buttonconfigure index ?option? ?value option value ...?
#
# Configure a push button given by index. This method allows
# configuration of pushbuttons from the Buttonbox level. The options
# may have any of the values accepted by the add method.
# ------------------------------------------------------------------
itcl::body iwidgets::Buttonbox::buttonconfigure {index args} {
set tag [lindex $_buttonList [index $index]]
set retstr [uplevel $itk_component($tag) configure $args]
_setBoxSize
return $retstr
}
# ------------------------------------------------------------------
# METHOD: buttonccget index option
#
# Return value of option for push button given by index. Option may
# have any of the values accepted by the add method.
# ------------------------------------------------------------------
itcl::body iwidgets::Buttonbox::buttoncget {index option} {
set tag [lindex $_buttonList [index $index]]
set retstr [uplevel $itk_component($tag) cget [list $option]]
return $retstr
}
# -----------------------------------------------------------------
# PRIVATE METHOD: _getMaxWidth
#
# Returns the required width of the largest button.
# -----------------------------------------------------------------
itcl::body iwidgets::Buttonbox::_getMaxWidth {} {
set max 0
foreach tag $_displayList {
set w [winfo reqwidth $itk_component($tag)]
if {$w > $max} {
set max $w
}
}
return $max
}
# -----------------------------------------------------------------
# PRIVATE METHOD: _getMaxHeight
#
# Returns the required height of the largest button.
# -----------------------------------------------------------------
itcl::body iwidgets::Buttonbox::_getMaxHeight {} {
set max 0
foreach tag $_displayList {
set h [winfo reqheight $itk_component($tag)]
if {$h > $max} {
set max $h
}
}
return $max
}
# ------------------------------------------------------------------
# METHOD: _setBoxSize ?when?
#
# Sets the proper size of the frame surrounding all the buttons.
# 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::Buttonbox::_setBoxSize {{when later}} {
if {[winfo ismapped $itk_component(hull)]} {
if {$when == "later"} {
if {$_resizeFlag == ""} {
set _resizeFlag [after idle [itcl::code $this _setBoxSize now]]
}
return
} elseif {$when != "now"} {
error "bad option \"$when\": should be now or later"
}
set _resizeFlag ""
set numBtns [llength $_displayList]
if {$itk_option(-orient) == "horizontal"} {
set minw [expr {$numBtns * [_getMaxWidth] \
+ ($numBtns+1) * $itk_option(-padx)}]
set minh [expr {[_getMaxHeight] + 2 * $itk_option(-pady)}]
} else {
set minw [expr {[_getMaxWidth] + 2 * $itk_option(-padx)}]
set minh [expr {$numBtns * [_getMaxHeight] \
+ ($numBtns+1) * $itk_option(-pady)}]
}
#
# Remove the configure event bindings on the hull while we adjust the
# width/height and re-position the buttons. Once we're through, we'll
# update and reinstall them. This prevents double calls to position
# the buttons.
#
set tags [bindtags $itk_component(hull)]
if {[set i [lsearch $tags bbox-config]] != -1} {
set tags [lreplace $tags $i $i]
bindtags $itk_component(hull) $tags
}
component hull configure -width $minw -height $minh
update idletasks
_positionButtons
bindtags $itk_component(hull) [linsert $tags 0 bbox-config]
}
}
# ------------------------------------------------------------------
# METHOD: _positionButtons
#
# This method is responsible setting the width/height of all the
# displayed buttons to the same value and for placing all the buttons
# in equidistant locations.
# ------------------------------------------------------------------
itcl::body iwidgets::Buttonbox::_positionButtons {} {
set bf $itk_component(hull)
set numBtns [llength $_displayList]
#
# First, determine the common width and height for all the
# displayed buttons.
#
if {$numBtns > 0} {
set bfWidth [winfo width $itk_component(hull)]
set bfHeight [winfo height $itk_component(hull)]
if {$bfWidth >= [winfo reqwidth $itk_component(hull)]} {
set _btnWidth [_getMaxWidth]
} else {
if {$itk_option(-orient) == "horizontal"} {
set _btnWidth [expr {$bfWidth / $numBtns}]
} else {
set _btnWidth $bfWidth
}
}
if {$bfHeight >= [winfo reqheight $itk_component(hull)]} {
set _btnHeight [_getMaxHeight]
} else {
if {$itk_option(-orient) == "vertical"} {
set _btnHeight [expr {$bfHeight / $numBtns}]
} else {
set _btnHeight $bfHeight
}
}
}
#
# Place the buttons at the proper locations.
#
if {$numBtns > 0} {
if {$itk_option(-orient) == "horizontal"} {
set leftover [expr {[winfo width $bf] \
- 2 * $itk_option(-padx) - $_btnWidth * $numBtns}]
if {$numBtns > 0} {
set offset [expr {$leftover / ($numBtns + 1)}]
} else {
set offset 0
}
if {$offset < 0} {set offset 0}
set xDist [expr {$itk_option(-padx) + $offset}]
set incrAmount [expr {$_btnWidth + $offset}]
foreach button $_displayList {
place $itk_component($button) -anchor w \
-x $xDist -rely .5 -y 0 -relx 0 \
-width $_btnWidth -height $_btnHeight
set xDist [expr {$xDist + $incrAmount}]
}
} else {
set leftover [expr {[winfo height $bf] \
- 2 * $itk_option(-pady) - $_btnHeight * $numBtns}]
if {$numBtns > 0} {
set offset [expr {$leftover / ($numBtns + 1)}]
} else {
set offset 0
}
if {$offset < 0} {set offset 0}
set yDist [expr {$itk_option(-pady) + $offset}]
set incrAmount [expr {$_btnHeight + $offset}]
foreach button $_displayList {
place $itk_component($button) -anchor n \
-y $yDist -relx .5 -x 0 -rely 0 \
-width $_btnWidth -height $_btnHeight
set yDist [expr {$yDist + $incrAmount}]
}
}
}
}