1# puzzle.tcl -- 2# 3# This demonstration script creates a 15-puzzle game using a collection 4# of buttons. 5# 6# RCS: @(#) $Id: puzzle.tcl,v 1.4.2.1 2007/04/29 02:24:24 das Exp $ 7 8if {![info exists widgetDemo]} { 9 error "This script should be run from the \"widget\" demo." 10} 11 12# puzzleSwitch -- 13# This procedure is invoked when the user clicks on a particular button; 14# if the button is next to the empty space, it moves the button into th 15# empty space. 16 17proc puzzleSwitch {w num} { 18 global xpos ypos 19 if {(($ypos($num) >= ($ypos(space) - .01)) 20 && ($ypos($num) <= ($ypos(space) + .01)) 21 && ($xpos($num) >= ($xpos(space) - .26)) 22 && ($xpos($num) <= ($xpos(space) + .26))) 23 || (($xpos($num) >= ($xpos(space) - .01)) 24 && ($xpos($num) <= ($xpos(space) + .01)) 25 && ($ypos($num) >= ($ypos(space) - .26)) 26 && ($ypos($num) <= ($ypos(space) + .26)))} { 27 set tmp $xpos(space) 28 set xpos(space) $xpos($num) 29 set xpos($num) $tmp 30 set tmp $ypos(space) 31 set ypos(space) $ypos($num) 32 set ypos($num) $tmp 33 place $w.frame.$num -relx $xpos($num) -rely $ypos($num) 34 } 35} 36 37set w .puzzle 38catch {destroy $w} 39toplevel $w 40wm title $w "15-Puzzle Demonstration" 41wm iconname $w "15-Puzzle" 42positionWindow $w 43 44label $w.msg -font $font -wraplength 4i -justify left -text "A 15-puzzle appears below as a collection of buttons. Click on any of the pieces next to the space, and that piece will slide over the space. Continue this until the pieces are arranged in numerical order from upper-left to lower-right." 45pack $w.msg -side top 46 47frame $w.buttons 48pack $w.buttons -side bottom -fill x -pady 2m 49button $w.buttons.dismiss -text Dismiss -command "destroy $w" 50button $w.buttons.code -text "See Code" -command "showCode $w" 51pack $w.buttons.dismiss $w.buttons.code -side left -expand 1 52 53# Special trick: select a darker color for the space by creating a 54# scrollbar widget and using its trough color. 55 56scrollbar $w.s 57 58# The button metrics are a bit bigger in Aqua, and since we are 59# using place which doesn't autosize, then we need to have a 60# slightly larger frame here... 61 62if {[tk windowingsystem] eq "aqua"} { 63 set frameSize 168 64} else { 65 set frameSize 120 66} 67 68frame $w.frame -width $frameSize -height $frameSize -borderwidth 2\ 69 -relief sunken -bg [$w.s cget -troughcolor] 70pack $w.frame -side top -pady 1c -padx 1c 71destroy $w.s 72 73set order {3 1 6 2 5 7 15 13 4 11 8 9 14 10 12} 74for {set i 0} {$i < 15} {set i [expr {$i+1}]} { 75 set num [lindex $order $i] 76 set xpos($num) [expr {($i%4)*.25}] 77 set ypos($num) [expr {($i/4)*.25}] 78 button $w.frame.$num -relief raised -text $num -highlightthickness 0 \ 79 -command "puzzleSwitch $w $num" 80 place $w.frame.$num -relx $xpos($num) -rely $ypos($num) \ 81 -relwidth .25 -relheight .25 82} 83set xpos(space) .75 84set ypos(space) .75 85