3 # This demonstration script shows an example with a horizontal scale.
5 # RCS: @(#) $Id: hscale.tcl,v 1.5 2004/12/21 11:56:35 dkf Exp $
7 if {![info exists widgetDemo
]} {
8 error "This script should be run from the \"widget\" demo."
16 wm title
$w "Horizontal Scale Demonstration"
17 wm iconname
$w "hscale"
20 label $w.msg
-font $font -wraplength 3.5i
-justify left
-text "An arrow and a horizontal scale are displayed below. If you click or drag mouse button 1 in the scale, you can change the length of the arrow."
21 pack $w.msg
-side top
-padx .5c
23 ## See Code / Dismiss buttons
24 set btns
[addSeeDismiss
$w.buttons
$w]
25 pack $btns -side bottom
-fill x
27 frame $w.
frame -borderwidth 10
28 pack $w.
frame -side top
-fill x
30 canvas $w.
frame.
canvas -width 50 -height 50 -bd 0 -highlightthickness 0
31 $w.
frame.
canvas create polygon
0 0 1 1 2 2 -fill DeepSkyBlue3
-tags poly
32 $w.
frame.
canvas create line
0 0 1 1 2 2 0 0 -fill black
-tags line
33 scale $w.
frame.
scale -orient horizontal
-length 284 -from 0 -to 250 \
34 -command "setWidth $w.frame.canvas" -tickinterval 50
35 pack $w.
frame.
canvas -side top
-expand yes
-anchor s
-fill x
-padx 15
36 pack $w.
frame.
scale -side bottom
-expand yes
-anchor n
39 proc setWidth
{w width
} {
41 set x2
[expr {$width - 30}]
45 $w coords poly
20 15 20 35 $x2 35 $x2 45 $width 25 $x2 5 $x2 15 20 15
46 $w coords line
20 15 20 35 $x2 35 $x2 45 $width 25 $x2 5 $x2 15 20 15