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 Object:
"""Base class for composite graphical objects.
Objects belong to a canvas, and can be moved around on the canvas.
They also belong to at most one ``pile'' of objects, and can be
transferred between piles (or removed from their pile).
Objects have a canonical ``x, y'' position which is moved when the
object is moved. Where the object is relative to this position
depends on the object; for simple objects, it may be their center.
Objects have mouse sensitivity. They can be clicked, dragged and
double-clicked. The behavior may actually determined by the pile
they are in.
All instance attributes are public since the derived class may
need them.
"""
def __init__(self, canvas, x=0, y=0, fill='red', text='object'):
self.canvas = canvas
self.x = x
self.y = y
self.pile = None
self.group = Group(self.canvas)
self.createitems(fill, text)
def __str__(self):
return str(self.group)
def createitems(self, fill, text):
self.__oval = Oval(self.canvas,
self.x-20, self.y-10, self.x+20, self.y+10,
fill=fill, width=3)
self.group.addtag_withtag(self.__oval)
self.__text = CanvasText(self.canvas,
self.x, self.y, text=text)
self.group.addtag_withtag(self.__text)
def moveby(self, dx, dy):
if dx == dy == 0:
return
self.group.move(dx, dy)
self.x = self.x + dx
self.y = self.y + dy
def moveto(self, x, y):
self.moveby(x - self.x, y - self.y)
def transfer(self, pile):
if self.pile:
self.pile.delete(self)
self.pile = None
self.pile = pile
if self.pile:
self.pile.add(self)
def tkraise(self):
self.group.tkraise()
#! /usr/bin/env python
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 Object:
"""Base class for composite graphical objects.
Objects belong to a canvas, and can be moved around on the canvas.
They also belong to at most one ``pile'' of objects, and can be
transferred between piles (or removed from their pile).
Objects have a canonical ``x, y'' position which is moved when the
object is moved. Where the object is relative to this position
depends on the object; for simple objects, it may be their center.
Objects have mouse sensitivity. They can be clicked, dragged and
double-clicked. The behavior may actually be determined by the pile
they are in.
All instance attributes are public since the derived class may
need them.
"""
def __init__(self, canvas, x=0, y=0, fill='red', text='object'):
self.canvas = canvas
self.x = x
self.y = y
self.pile = None
self.group = Group(self.canvas)
self.createitems(fill, text)
def __str__(self):
return str(self.group)
def createitems(self, fill, text):
self.__oval = Oval(self.canvas,
self.x - 20,
self.y - 10,
self.x + 20,
self.y + 10,
fill=fill,
width=3)
self.group.addtag_withtag(self.__oval)
self.__text = CanvasText(self.canvas, self.x, self.y, text=text)
self.group.addtag_withtag(self.__text)
def moveby(self, dx, dy):
if dx == dy == 0:
return
self.group.move(dx, dy)
self.x = self.x + dx
self.y = self.y + dy
def moveto(self, x, y):
self.moveby(x - self.x, y - self.y)
def transfer(self, pile):
if self.pile:
self.pile.delete(self)
self.pile = None
self.pile = pile
if self.pile:
self.pile.add(self)
def tkraise(self):
self.group.tkraise()
#! /usr/bin/env python
#! /usr/bin/env python