-- Captures visual commonality among all the pieces used in
-- solving a puzzle.

deferred class V_GAME_PIECE

inherit

  V_PIECE
  rename 
    cell as northwest
  end

  GAME_PIECE
  redefine
    northwest, clear
  end

feature{NONE}

  make( s : STRING ; vgr : V_GAME_ROOM ; c : V_GAME_CELL ) is
  -- Initialize myself and occupy 'c'. 'vgr' will be my parent
  -- widget.
  require 
    vacant: not c.occupied
  do
    wc_make( vgr, s )
    get_id
    init( vgr, c )
    get_bitmaps
    resize( configuration.piece_width, configuration.piece_height )
  end

  make_customized( s : STRING ; vgr : V_GAME_ROOM ; pr : LINKED_LIST[ INTEGER ] ) is
  -- Initialize myself based on the data in `pr'. 'vgr' will be my parent
  -- widget.
  require 
  do
    wc_make( vgr, s )
    get_bitmaps
    customized_init( vgr, pr )
 --   restore( pr )
    resize( configuration.piece_width, configuration.piece_height )
  end

  display_occupy is
  -- Put myself at the correct pixel coordinates based on my cells.
  do
    move( northwest.x, northwest.y )
    if configuration.is_foreground_piece( id ) then
       raise
    end
    show
    invalidate
  end

  display_vacate is
  -- Default is do nothing
  do
    hide
  end

  get_bitmaps is
  -- Get whatever bitmaps I need.
  deferred
  end

  get_id is
  -- Get my id code.
  deferred
  end

feature

  clear is
  -- Default is to vacate my cells and 'destroy' myself.
  do
    if northeast /= Void then
      vacate
    end
    destroy
  end

  northwest : V_GAME_CELL
  -- My northwest corner. Need visual version as I
  -- my cell's pixel coordinates.

end