3 # This demonstration script shows an example with a vertical scale.
7 if {![info exists widgetDemo]} {
8 error "This script should be run from the \"widget\" demo."
14 wm title $w "Vertical Scale Demonstration"
15 wm iconname $w "vscale"
18 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."
19 pack $w.msg -side top -padx .5c
22 pack $w.buttons -side bottom -fill x -pady 2m
23 button $w.buttons.dismiss -text Dismiss -command "destroy $w"
24 button $w.buttons.code -text "See Code" -command "showCode $w"
25 pack $w.buttons.dismiss $w.buttons.code -side left -expand 1
27 frame $w.frame -borderwidth 10
30 scale $w.frame.scale -orient vertical -length 284 -from 0 -to 250 \
31 -command "setHeight $w.frame.canvas" -tickinterval 50
32 canvas $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
35 frame $w.frame.right -borderwidth 15
36 pack $w.frame.scale -side left -anchor ne
37 pack $w.frame.canvas -side left -anchor nw -fill y
40 proc setHeight {w height} {
42 set y2 [expr $height - 30]
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