Ruby/tkで完全なレイアウト管理サンプル

2014年8月6日

rubyコード：
require “tk"

$top = { 'side’ => 'top’, 'padx’=>5, 'pady’=>5 }
$left = { 'side’ => 'left’, 'padx’=>5, 'pady’=>5 }
$bottom = { 'side’ => 'bottom’, 'padx’=>5, 'pady’=>5 }

$temp = 74 # Starting temperature…

root = TkRoot.new { title “Thermostat" }

top = TkFrame.new(root) { background “#606060" }
bottom = TkFrame.new(root)

$tlab = TkLabel.new(top) do
text $temp.to_s
font “{Arial} 54 {bold}"
foreground “green"
background “#606060"
pack $left
end

TkLabel.new(top) do # the “degree" symbol
text “o"
font “{Arial} 14 {bold}"
foreground “green"
background “#606060″
# Add anchor-north to the hash (make a superscript)
pack $left.update({ 'anchor’ => 'n’ })
end

TkButton.new(bottom) do
text " Up "
command proc { $tlab.configure(“text"=>($temp+=1).to_s) }
pack $left
end

TkButton.new(bottom) do
text “Down"
command proc { $tlab.configure(“text"=>($temp-=1).to_s) }
pack $left
end

top.pack $top
bottom.pack $bottom

Tk.mainloop