graphic_piece

• Overview
  • a graphic_piece is a visible, mutable object. It is a chess piece which is located on a graphic_board.
  • written by pepellet
• create = proc(gb: graphic_board, pc: pieceColor, pk: pieceKind, r: int, c: int) returns(cvt)
  • requires: gb has not been destroyed, and gb.window has not been destroyed.
  • modifies: gb and gb.window
  • effects: creates, displays, and returns a new graphic_piece of color pc and kind pk, located on graphic_board gb at row r and column c.
• destroy = proc(gp: cvt)
  • requires: gp has not been destroyed, and the window gp exists in has not been destroyed
  • modifies: the window gp exists in
  • effects: removes gp from the window
• moveto = proc(gp: cvt, r: int, c: int)
  • requires: gp has not been destroyed, and the window gp exists in has not been destroyed
  • modifies: gp
  • effects: moves gp to row r and column c
• get_color = proc(gp: cvt) returns (pieceColor)
  • effects: returns the color of piece gp
• get_kind = proc(gp: cvt) returns (pieceKind)
  • effects: returns the kind of piece gp