Python Group.move方法代码示例

# 需要导入模块: from Canvas import Group [as 别名]
# 或者: from Canvas.Group import move [as 别名]
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()

# 需要导入模块: from Canvas import Group [as 别名]
# 或者: from Canvas.Group import move [as 别名]
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

# 需要导入模块: from Canvas import Group [as 别名]
# 或者: from Canvas.Group import move [as 别名]
#! /usr/bin/env python