1# vscale.tcl -- 2# 3# This demonstration script shows an example with a vertical scale. 4# 5# RCS: @(#) $Id: vscale.tcl,v 1.3 2001/06/14 10:56:58 dkf Exp $ 6 7if {![info exists widgetDemo]} { 8 error "This script should be run from the \"widget\" demo." 9} 10 11set w .vscale 12catch {destroy $w} 13toplevel $w 14wm title $w "Vertical Scale Demonstration" 15wm iconname $w "vscale" 16positionWindow $w 17 18label $w.msg -font $font -wraplength 3.5i -justify left -text "An arrow and a vertical scale are displayed below. If you click or drag mouse button 1 in the scale, you can change the size of the arrow." 19pack $w.msg -side top -padx .5c 20 21frame $w.buttons 22pack $w.buttons -side bottom -fill x -pady 2m 23button $w.buttons.dismiss -text Dismiss -command "destroy $w" 24button $w.buttons.code -text "See Code" -command "showCode $w" 25pack $w.buttons.dismiss $w.buttons.code -side left -expand 1 26 27frame $w.frame -borderwidth 10 28pack $w.frame 29 30scale $w.frame.scale -orient vertical -length 284 -from 0 -to 250 \ 31 -command "setHeight $w.frame.canvas" -tickinterval 50 32canvas $w.frame.canvas -width 50 -height 50 -bd 0 -highlightthickness 0 33$w.frame.canvas create polygon 0 0 1 1 2 2 -fill SeaGreen3 -tags poly 34$w.frame.canvas create line 0 0 1 1 2 2 0 0 -fill black -tags line 35frame $w.frame.right -borderwidth 15 36pack $w.frame.scale -side left -anchor ne 37pack $w.frame.canvas -side left -anchor nw -fill y 38$w.frame.scale set 75 39 40proc setHeight {w height} { 41 incr height 21 42 set y2 [expr {$height - 30}] 43 if {$y2 < 21} { 44 set y2 21 45 } 46 $w coords poly 15 20 35 20 35 $y2 45 $y2 25 $height 5 $y2 15 $y2 15 20 47 $w coords line 15 20 35 20 35 $y2 45 $y2 25 $height 5 $y2 15 $y2 15 20 48} 49