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Current File : //usr/share/tk8.5/demos/mclist.tcl
# mclist.tcl --
#
# This demonstration script creates a toplevel window containing a Ttk
# tree widget configured as a multi-column listbox.
#
# RCS: @(#) $Id: mclist.tcl,v 1.3 2007/12/13 15:27:07 dgp Exp $

if {![info exists widgetDemo]} {
    error "This script should be run from the \"widget\" demo."
}

package require Tk
package require Ttk

set w .mclist
catch {destroy $w}
toplevel $w
wm title $w "Multi-Column List"
wm iconname $w "mclist"
positionWindow $w

## Explanatory text
ttk::label $w.msg -font $font -wraplength 4i -justify left -anchor n -padding {10 2 10 6} -text "Ttk is the new Tk themed widget set. One of the widgets it includes is a tree widget, which can be configured to display multiple columns of informational data without displaying the tree itself. This is a simple way to build a listbox that has multiple columns. Clicking on the heading for a column will sort the data by that column. You can also change the width of the columns by dragging the boundary between them."
pack $w.msg -fill x

## See Code / Dismiss
pack [addSeeDismiss $w.seeDismiss $w] -side bottom -fill x

ttk::frame $w.container
ttk::treeview $w.tree -columns {country capital currency} -show headings \
    -yscroll "$w.vsb set" -xscroll "$w.hsb set"
if {[tk windowingsystem] ne "aqua"} {
    ttk::scrollbar $w.vsb -orient vertical -command "$w.tree yview"
    ttk::scrollbar $w.hsb -orient horizontal -command "$w.tree xview"
} else {
    scrollbar $w.vsb -orient vertical -command "$w.tree yview"
    scrollbar $w.hsb -orient horizontal -command "$w.tree xview"
}
pack $w.container -fill both -expand 1
grid $w.tree $w.vsb -in $w.container -sticky nsew
grid $w.hsb         -in $w.container -sticky nsew
grid column $w.container 0 -weight 1
grid row    $w.container 0 -weight 1

## The data we're going to insert
set data {
    Argentina		{Buenos Aires}		ARS
    Australia		Canberra		AUD
    Brazil		Brazilia		BRL
    Canada		Ottawa			CAD
    China		Beijing			CNY
    France		Paris			EUR
    Germany		Berlin			EUR
    India		{New Delhi}		INR
    Italy		Rome			EUR
    Japan		Tokyo			JPY
    Mexico		{Mexico City}		MXN
    Russia		Moscow			RUB
    {South Africa}	Pretoria		ZAR
    {United Kingdom}	London			GBP
    {United States}	{Washington, D.C.}	USD
}

## Code to insert the data nicely
set font [ttk::style lookup [$w.tree cget -style] -font]
foreach col {country capital currency} name {Country Capital Currency} {
    $w.tree heading $col -command [list SortBy $w.tree $col 0] -text $name
    $w.tree column $col -width [font measure $font $name]
}
foreach {country capital currency} $data {
    $w.tree insert {} end -values [list $country $capital $currency]
    foreach col {country capital currency} {
	set len [font measure $font "[set $col]  "]
	if {[$w.tree column $col -width] < $len} {
	    $w.tree column $col -width $len
	}
    }
}

## Code to do the sorting of the tree contents when clicked on
proc SortBy {tree col direction} {
    # Build something we can sort
    set data {}
    foreach row [$tree children {}] {
	lappend data [list [$tree set $row $col] $row]
    }

    set dir [expr {$direction ? "-decreasing" : "-increasing"}]
    set r -1

    # Now reshuffle the rows into the sorted order
    foreach info [lsort -dictionary -index 0 $dir $data] {
	$tree move [lindex $info 1] {} [incr r]
    }

    # Switch the heading so that it will sort in the opposite direction
    $tree heading $col -command [list SortBy $tree $col [expr {!$direction}]]
}
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