ruby--ruby/ext/tk/sample/demos-en/filebox.rb

# filebox.rb
#
# This demonstration script prompts the user to select a file.#
# widget demo prompts the user to select a file (called by 'widget')
#

# toplevel widget
if defined?($filebox_demo) && $filebox_demo
  $filebox_demo.destroy 
  $filebox_demo = nil
end

# demo toplevel widget
$filebox_demo = TkToplevel.new {|w|
  title("File Selection Dialogs")
  iconname("filebox")
  positionWindow(w)
}

base_frame = TkFrame.new($filebox_demo).pack(:fill=>:both, :expand=>true)

# label
TkLabel.new(base_frame,'font'=>$font,'wraplength'=>'4i','justify'=>'left',
            'text'=>"Enter a file name in the entry box or click on the \"Browse\" buttons to select a file name using the file selection dialog.").pack('side'=>'top')

# frame
TkFrame.new(base_frame) {|frame|
  TkButton.new(frame) {
    text 'Dismiss'
    command proc{
      tmppath = $filebox_demo
      $filebox_demo = nil
      tmppath.destroy
    }
  }.pack('side'=>'left', 'expand'=>'yes')

  TkButton.new(frame) {
    text 'Show Code'
    command proc{showCode 'filebox'}
  }.pack('side'=>'left', 'expand'=>'yes')
}.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m')

# frame
['open', 'save'].each{|type|
  TkFrame.new(base_frame) {|f|
    TkLabel.new(f, 'text'=>"Select a file to #{type}: ", 'anchor'=>'e')\
    .pack('side'=>'left')

    TkEntry.new(f, 'width'=>20) {|e|
      pack('side'=>'left', 'expand'=>'yes', 'fill'=>'x')

      TkButton.new(f, 'text'=>'Browse ...', 
                   'command'=>proc{fileDialog base_frame,e,type})\
      .pack('side'=>'left')
    }

    pack('fill'=>'x', 'padx'=>'1c', 'pady'=>3)
  }
}

$tk_strictMotif = TkVarAccess.new('tk_strictMotif')
if ($tk_platform['platform'] == 'unix')
  TkCheckButton.new(base_frame, 
                    'text'=>'Use Motif Style Dialog', 
                    'variable'=>$tk_strictMotif, 
                    'onvalue'=>1, 'offvalue'=>0 ).pack('anchor'=>'c')
end

def fileDialog(w,ent,operation)
  #    Type names         Extension(s)             Mac File Type(s)
  #
  #--------------------------------------------------------
  types = [
    ['Text files',       ['.txt','.doc']          ], 
    ['Text files',       [],                      'TEXT' ], 
    ['Ruby Scripts',     ['.rb'],                 'TEXT' ], 
    ['Tcl Scripts',      ['.tcl'],                'TEXT' ], 
    ['C Source Files',   ['.c','.h']              ], 
    ['All Source Files', ['.rb','.tcl','.c','.h'] ], 
    ['Image Files',      ['.gif']                 ], 
    ['Image Files',      ['.jpeg','.jpg']         ], 
    ['Image Files',      [],                      ['GIFF','JPEG']], 
    ['All files',        '*'                      ]
  ]

  if operation == 'open'
    file = Tk.getOpenFile('filetypes'=>types, 'parent'=>w)
  else
    file = Tk.getSaveFile('filetypes'=>types, 'parent'=>w, 
                          'initialfile'=>'Untitled', 
                          'defaultextension'=>'.txt')
  end
  if file != ""
    ent.delete 0, 'end'
    ent.insert 0, file
    # ent.xview 'end'
    Tk.update_idletasks # need this for Tk::Tile::Entry
                        # (to find right position of 'xview').
    ent.xview(ent.index('end'))
  end
end