class Card: """A playing card. A card doesn't record to which stack it belongs; only the stack records this (it turns out that we always know this from the context, and this saves a ``double update'' with potential for inconsistencies). Public methods: moveto(x, y) -- move the card to an absolute position moveby(dx, dy) -- move the card by a relative offset tkraise() -- raise the card to the top of its stack showface(), showback() -- turn the card face up or down & raise it Public read-only instance variables: suit, value, color -- the card's suit, value and color face_shown -- true when the card is shown face up, else false Semi-public read-only instance variables (XXX should be made private): group -- the Canvas.Group representing the card x, y -- the position of the card's top left corner Private instance variables: __back, __rect, __text -- the canvas items making up the card (To show the card face up, the text item is placed in front of rect and the back is placed behind it. To show it face down, this is reversed. The card is created face down.) """ def __init__(self, suit, value, canvas): """Card constructor. Arguments are the card's suit and value, and the canvas widget. The card is created at position (0, 0), with its face down (adding it to a stack will position it according to that stack's rules). """ self.suit = suit self.value = value self.color = COLOR[suit] self.face_shown = 0 self.x = self.y = 0 self.group = Group(canvas) text = "%s %s" % (VALNAMES[value], suit) self.__text = CanvasText(canvas, CARDWIDTH / 2, 0, anchor=N, fill=self.color, text=text) self.group.addtag_withtag(self.__text) self.__rect = Rectangle(canvas, 0, 0, CARDWIDTH, CARDHEIGHT, outline='black', fill='white') self.group.addtag_withtag(self.__rect) self.__back = Rectangle(canvas, MARGIN, MARGIN, CARDWIDTH - MARGIN, CARDHEIGHT - MARGIN, outline='black', fill='blue') self.group.addtag_withtag(self.__back) def __repr__(self): """Return a string for debug print statements.""" return "Card(%r, %r)" % (self.suit, self.value) def moveto(self, x, y): """Move the card to absolute position (x, y).""" self.moveby(x - self.x, y - self.y) def moveby(self, dx, dy): """Move the card by (dx, dy).""" self.x = self.x + dx self.y = self.y + dy self.group.move(dx, dy) def tkraise(self): """Raise the card above all other objects in its canvas.""" self.group.tkraise() def showface(self): """Turn the card's face up.""" self.tkraise() self.__rect.tkraise() self.__text.tkraise() self.face_shown = 1 def showback(self): """Turn the card's face down.""" self.tkraise() self.__rect.tkraise() self.__back.tkraise() self.face_shown = 0
class Card: """A playing card. A card doesn't record to which stack it belongs; only the stack records this (it turns out that we always know this from the context, and this saves a ``double update'' with potential for inconsistencies). Public methods: moveto(x, y) -- move the card to an absolute position moveby(dx, dy) -- move the card by a relative offset tkraise() -- raise the card to the top of its stack showface(), showback() -- turn the card face up or down & raise it Public read-only instance variables: suit, value, color -- the card's suit, value and color face_shown -- true when the card is shown face up, else false Semi-public read-only instance variables (XXX should be made private): group -- the Canvas.Group representing the card x, y -- the position of the card's top left corner Private instance variables: __back, __rect, __text -- the canvas items making up the card (To show the card face up, the text item is placed in front of rect and the back is placed behind it. To show it face down, this is reversed. The card is created face down.) """ def __init__(self, suit, value, canvas): """Card constructor. Arguments are the card's suit and value, and the canvas widget. The card is created at position (0, 0), with its face down (adding it to a stack will position it according to that stack's rules). """ self.suit = suit self.value = value self.color = COLOR[suit] self.face_shown = 0 self.x = self.y = 0 self.group = Group(canvas) text = "%s %s" % (VALNAMES[value], suit) self.__text = CanvasText(canvas, CARDWIDTH/2, 0, anchor=N, fill=self.color, text=text) self.group.addtag_withtag(self.__text) self.__rect = Rectangle(canvas, 0, 0, CARDWIDTH, CARDHEIGHT, outline='black', fill='white') self.group.addtag_withtag(self.__rect) self.__back = Rectangle(canvas, MARGIN, MARGIN, CARDWIDTH-MARGIN, CARDHEIGHT-MARGIN, outline='black', fill='blue') self.group.addtag_withtag(self.__back) def __repr__(self): """Return a string for debug print statements.""" return "Card(%r, %r)" % (self.suit, self.value) def moveto(self, x, y): """Move the card to absolute position (x, y).""" self.moveby(x - self.x, y - self.y) def moveby(self, dx, dy): """Move the card by (dx, dy).""" self.x = self.x + dx self.y = self.y + dy self.group.move(dx, dy) def tkraise(self): """Raise the card above all other objects in its canvas.""" self.group.tkraise() def showface(self): """Turn the card's face up.""" self.tkraise() self.__rect.tkraise() self.__text.tkraise() self.face_shown = 1 def showback(self): """Turn the card's face down.""" self.tkraise() self.__rect.tkraise() self.__back.tkraise() self.face_shown = 0
#! /usr/bin/env python