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# vscale.tcl --

#

# This demonstration script shows an example with a vertical scale.

#

# SCCS: @(#) vscale.tcl 1.4 97/03/02 16:28:34

if {![info exists widgetDemo]} {

    error "This script should be run from the \"widget\" demo."

}

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

frame $w.buttons

pack $w.buttons -side bottom -fill x -pady 2m

button $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 1

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

}