75 lines
1.8 KiB
Ruby
75 lines
1.8 KiB
Ruby
require "tkcanvas"
|
|
|
|
if defined?($hscale_demo) && $hscale_demo
|
|
$hscale_demo.destroy
|
|
$hscale_demo = nil
|
|
end
|
|
|
|
$hscale_demo = TkToplevel.new {|w|
|
|
title("Horizontal Scale Demonstration")
|
|
iconname("hscale")
|
|
}
|
|
positionWindow($hscale_demo)
|
|
|
|
|
|
msg = TkLabel.new($hscale_demo) {
|
|
font $font
|
|
wraplength '3.5i'
|
|
justify 'left'
|
|
text "An arrow and a horizontal scale are displayed below. If you click or drag mouse button 1 in the scale, you can change the length of the arrow."
|
|
}
|
|
msg.pack('side'=>'top')
|
|
|
|
TkFrame.new($hscale_demo) {|frame|
|
|
TkButton.new(frame) {
|
|
text 'Dismiss'
|
|
command proc {
|
|
tmppath = $hscale_demo
|
|
$hscale_demo = nil
|
|
tmppath.destroy
|
|
}
|
|
}.pack('side'=>'left', 'expand'=>'yes')
|
|
|
|
TkButton.new(frame) {
|
|
text 'Show Code'
|
|
command proc { showCode 'hscale' }
|
|
}.pack('side'=>'left', 'expand'=>'yes')
|
|
}.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m')
|
|
|
|
TkFrame.new($hscale_demo) {|frame|
|
|
canvas = TkCanvas.new(frame) {|c|
|
|
width 50
|
|
height 50
|
|
bd 0
|
|
highlightthickness 0
|
|
TkcPolygon.new(c, '0', '0', '1', '1', '2', '2') {
|
|
fill 'DeepSkyBlue'
|
|
tags 'poly'
|
|
}
|
|
TkcLine.new(c, '0', '0', '1', '1', '2', '2', '0', '0') {
|
|
fill 'black'
|
|
tags 'line'
|
|
}
|
|
}.pack('side'=>'top', 'expand'=>'yes', 'anchor'=>'s', 'fill'=>'x', 'padx'=>'15')
|
|
scale = TkScale.new(frame) {
|
|
orient 'horizontal'
|
|
length 284
|
|
from 0
|
|
to 250
|
|
command proc{|value| setWidth(canvas, value)}
|
|
tickinterval 50
|
|
}.pack('side'=>'bottom', 'expand'=>'yes', 'anchor'=>'n')
|
|
scale.set 75
|
|
}.pack('side'=>'top', 'fill'=>'x')
|
|
|
|
def setWidth(w, width)
|
|
width = width + 21
|
|
x2 = width - 30
|
|
if x2 < 21
|
|
x2 = 21
|
|
end
|
|
w.coords 'poly',20,15,20,35,x2,35,x2,45,width,25,x2,5,x2,15,20,15
|
|
w.coords 'line',20,15,20,35,x2,35,x2,45,width,25,x2,5,x2,15,20,15
|
|
end
|
|
|