# button.tcl --## This demonstration script creates a toplevel window containing# several button widgets.## RCS: @(#) $Id: button.tcl,v 1.2 1998/09/14 18:23:27 stanton Exp $if {![info exists widgetDemo]} {    error "This script should be run from the \"widget\" demo."}set w .buttoncatch {destroy $w}toplevel $wwm title $w "Button Demonstration"wm iconname $w "button"positionWindow $wlabel $w.msg -font $font -wraplength 4i -justify left -text "If you click on any of the four buttons below, the background of the button area will change to the color indicated in the button.  You can press Tab to move among the buttons, then press Space to invoke the current button."pack $w.msg -side topframe $w.buttonspack $w.buttons -side bottom -fill x -pady 2mbutton $w.buttons.dismiss -text Dismiss -command "destroy $w"button $w.buttons.code -text "See Code" -command "showCode $w"pack $w.buttons.dismiss $w.buttons.code -side left -expand 1button $w.b1 -text "Peach Puff" -width 10 \    -command "$w config -bg PeachPuff1; $w.buttons config -bg PeachPuff1"button $w.b2 -text "Light Blue" -width 10 \    -command "$w config -bg LightBlue1; $w.buttons config -bg LightBlue1"button $w.b3 -text "Sea Green" -width 10 \    -command "$w config -bg SeaGreen2;  $w.buttons config -bg SeaGreen2"button $w.b4 -text "Yellow" -width 10 \    -command "$w config -bg Yellow1;    $w.buttons config -bg Yellow1"pack $w.b1 $w.b2 $w.b3 $w.b4 -side top -expand yes -pady 2