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# vscale.tcl --
#
# This demonstration script shows an example with a vertical scale.
if {![info exists widgetDemo]} {
error "This script should be run from the \"widget\" demo."
}
package require Tk
set w .vscale
catch {destroy $w}
toplevel $w
wm title $w "Vertical Scale Demonstration"
wm iconname $w "vscale"
positionWindow $w
label $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."
pack $w.msg -side top -padx .5c
## See Code / Dismiss buttons
set btns [addSeeDismiss $w.buttons $w]
pack $btns -side bottom -fill x
frame $w.frame -borderwidth 10
pack $w.frame
scale $w.frame.scale -orient vertical -length 284 -from 0 -to 250 \
-command "setHeight $w.frame.canvas" -tickinterval 50
canvas $w.frame.canvas -width 50 -height 50 -bd 0 -highlightthickness 0
$w.frame.canvas create polygon 0 0 1 1 2 2 -fill SeaGreen3 -tags poly
$w.frame.canvas create line 0 0 1 1 2 2 0 0 -fill black -tags line
frame $w.frame.right -borderwidth 15
pack $w.frame.scale -side left -anchor ne
pack $w.frame.canvas -side left -anchor nw -fill y
$w.frame.scale set 75
proc setHeight {w height} {
incr height 21
set y2 [expr {$height - 30}]
if {$y2 < 21} {
set y2 21
}
$w coords poly 15 20 35 20 35 $y2 45 $y2 25 $height 5 $y2 15 $y2 15 20
$w coords line 15 20 35 20 35 $y2 45 $y2 25 $height 5 $y2 15 $y2 15 20
}