ruby/ext/tk/sample/demos-jp/clrpick.rb

# -*- coding: euc-jp -*-
#
# widget demo prompts the user to select a color (called by 'widget')
#

# toplevel widget が存在すれば削除する
if defined?($clrpick_demo) && $clrpick_demo
  $clrpick_demo.destroy 
  $clrpick_demo = nil
end

# demo 用の toplevel widget を生成
$clrpick_demo = TkToplevel.new {|w|
  title("Color Selection Dialogs")
  iconname("colors")
  positionWindow(w)
}

# label 生成
TkLabel.new($clrpick_demo,'font'=>$font,'wraplength'=>'4i','justify'=>'left',
            'text'=>"以下のボタンを押して、このウィンドウ上にあるウィジェットの前景色と背景色を選択して下さい。").pack('side'=>'top')

# frame 生成
TkFrame.new($clrpick_demo) {|frame|
  TkButton.new(frame) {
    #text '了解'
    text '閉じる'
    command proc{
      tmppath = $clrpick_demo
      $clrpick_demo = nil
      tmppath.destroy
    }
  }.pack('side'=>'left', 'expand'=>'yes')

  TkButton.new(frame) {
    text 'コード参照'
    command proc{showCode 'clrpick'}
  }.pack('side'=>'left', 'expand'=>'yes')
}.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m')

# button 生成
TkButton.new($clrpick_demo, 'text'=>'背景色を設定 ...') {|b|
  command(proc{setColor $clrpick_demo, b, 'background', 
              ['background', 'highlightbackground']})
  pack('side'=>'top', 'anchor'=>'c', 'pady'=>'2m')
}

TkButton.new($clrpick_demo, 'text'=>'前景色を設定 ...') {|b|
  command(proc{setColor $clrpick_demo, b, 'foreground', ['foreground']})
  pack('side'=>'top', 'anchor'=>'c', 'pady'=>'2m')
}

def setColor(w,button,name,options)
  w.grab
  initialColor = button[name]
  color = Tk.chooseColor('title'=>"Choose a #{name} color", 'parent'=>w, 
                         'initialcolor'=>initialColor)
  if color != ""
    setColor_helper(w,options,color)
  end

  w.grab('release')
end

def setColor_helper(w, options, color)
  options.each{|opt|
    begin
      w[opt] = color
    rescue
    end
  }
  TkWinfo.children(w).each{|child|
    setColor_helper child, options, color
  }
end