1# hscale.tcl -- 2# 3# This demonstration script shows an example with a horizontal scale. 4# 5# RCS: @(#) $Id$ 6 7if {![info exists widgetDemo]} { 8 error "This script should be run from the \"widget\" demo." 9} 10 11package require Tk 12 13set w .hscale 14catch {destroy $w} 15toplevel $w 16wm title $w "Horizontal Scale Demonstration" 17wm iconname $w "hscale" 18positionWindow $w 19 20label $w.msg -font $font -wraplength 3.5i -justify left -text "An arrow and a horizontal scale are displayed below. If you click or drag mouse button 1 in the scale, you can change the length of the arrow." 21pack $w.msg -side top -padx .5c 22 23## See Code / Dismiss buttons 24set btns [addSeeDismiss $w.buttons $w] 25pack $btns -side bottom -fill x 26 27frame $w.frame -borderwidth 10 28pack $w.frame -side top -fill x 29 30canvas $w.frame.canvas -width 50 -height 50 -bd 0 -highlightthickness 0 31$w.frame.canvas create polygon 0 0 1 1 2 2 -fill DeepSkyBlue3 -tags poly 32$w.frame.canvas create line 0 0 1 1 2 2 0 0 -fill black -tags line 33scale $w.frame.scale -orient horizontal -length 284 -from 0 -to 250 \ 34 -command "setWidth $w.frame.canvas" -tickinterval 50 35pack $w.frame.canvas -side top -expand yes -anchor s -fill x -padx 15 36pack $w.frame.scale -side bottom -expand yes -anchor n 37$w.frame.scale set 75 38 39proc setWidth {w width} { 40 incr width 21 41 set x2 [expr {$width - 30}] 42 if {$x2 < 21} { 43 set x2 21 44 } 45 $w coords poly 20 15 20 35 $x2 35 $x2 45 $width 25 $x2 5 $x2 15 20 15 46 $w coords line 20 15 20 35 $x2 35 $x2 45 $width 25 $x2 5 $x2 15 20 15 47} 48