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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
- }
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