#
# checkbutton widget demo2 (called by 'widget')
#

# toplevel widget ¸ߤк
if defined?($check2_demo) && $check2_demo
  $check2_demo.destroy 
  $check2_demo = nil
end

# demo Ѥ toplevel widget 
$check2_demo = TkToplevel.new {|w|
  title("Checkbutton Demonstration 2")
  iconname("check2")
  positionWindow(w)
}

# label 
msg = TkLabel.new($check2_demo) {
  font $font
  wraplength '4i'
  justify 'left'
  text "ˤϣĤΥåܥɽƤޤåȥܥ֤ѤꡢTclѿTkVariable֥ȤǥǤޤˤˤΥܥξ֤򼨤ͤꤷޤǽΥܥξ֤¾ΣĤΥܥξ֤ˤ¸Ѳޤ⤷ĤΥܥΰ˥åդƤ硢ǽΥܥϥȥ饤ơȡʣ֡˥⡼ɤǤɽԤޤߤѿͤ򸫤ˤϡѿȡץܥ򥯥åƤ"
}
msg.pack('side'=>'top')

# ѿ
safety = TkVariable.new(0)
wipers = TkVariable.new(0)
brakes = TkVariable.new(0)
sober  = TkVariable.new(0)

# frame 
TkFrame.new($check2_demo) {|frame|
  TkGrid(TkFrame.new(frame, :height=>2, :relief=>:sunken, :bd=>2), 
         :columnspan=>4, :row=>0, :sticky=>'ew', :pady=>2)
  TkGrid('x', 
         TkButton.new(frame, :text=>'ѿ', 
                      :image=>$image['view'], :compound=>:left, 
                      :command=>proc{
                        showVars($check2_demo, 
                                 ['safety', safety], ['wipers', wipers], 
                                 ['brakes', brakes], ['sober', sober])
                      }), 
         TkButton.new(frame, :text=>'ɻ', 
                      :image=>$image['view'], :compound=>:left, 
                      :command=>proc{showCode 'check2'}), 
         TkButton.new(frame, :text=>'Ĥ', 
                      :image=>$image['delete'], :compound=>:left, 
                      :command=>proc{
                        tmppath = $check2_demo
                        $check2_demo = nil
                        $showVarsWin[tmppath.path] = nil
                        tmppath.destroy
                      }), 
         :padx=>4, :pady=>4)
  frame.grid_columnconfigure(0, :weight=>1)
}.pack('side'=>'bottom', 'fill'=>'x')


# checkbutton 
TkCheckButton.new($check2_demo, :text=>'', :variable=>safety, 
                  :relief=>:flat, :onvalue=>'all', :offvalue=>'none', 
                  :tristatevalue=>'partial'){
  pack('side'=>'top', 'pady'=>2, 'anchor'=>'w')
}

[ TkCheckButton.new($check2_demo, 'text'=>'磻ѡ OK', 'variable'=>wipers),
  TkCheckButton.new($check2_demo, 'text'=>'֥졼 OK', 'variable'=>brakes),
  TkCheckButton.new($check2_demo, 'text'=>'ž ', 'variable'=>sober)
].each{|w| 
  w.relief('flat')
  w.pack('side'=>'top', 'padx'=>15, 'pady'=>2, 'anchor'=>'w')
}

# tristate check
in_check = false
tristate_check = proc{|n1,n2,op|
  unless in_check
    in_check = true
    begin
      if n1 == safety
        if safety == 'none'
          wipers.value = 0
          brakes.value = 0
          sober.value  = 0
        elsif safety == 'all'
          wipers.value = 1
          brakes.value = 1
          sober.value  = 1
        end
      else
        if wipers == 1 && brakes == 1 && sober == 1
          safety.value = 'all'
        elsif wipers == 1 || brakes == 1 || sober == 1
          safety.value = 'partial'
        else
          safety.value = 'none'
        end
      end
    ensure
      in_check = false
    end
  end
}

[wipers, brakes, sober, safety].each{|v| v.trace('w', tristate_check)}
