states.py

# -*- encoding: utf-8 -*-
import common
from config import PIECE_POSITIONS
import pygame


class State(object):
    """Representa un estado de comportamiento de Checker."""

    def update(self):
        pass

class Starting(State):
    """Realiza el efecto de interpolacion al iniciar el juego"""

    def __init__(self, checker, position, player):
        self.checker = checker
        to_x, to_y = PIECE_POSITIONS[position]
        to = to_x, to_y

        checker.can_drag = False
        checker.rect.x = to_x


        self.moves = common.interpolate(checker.rect.topleft, to)

    def update(self):
        """Redibuja la ficha en el tablero"""
        try:
            self.checker.rect.topleft = self.moves.next()
        except StopIteration:
            self.checker.change_state(Normal(self.checker))


class Normal(State):
    """Estado normal de las piezas"""

    def __init__(self, checker):
        self.checker = checker
        self.checker.can_drag = True

    def update(self):
        pass


class Moving(State):
    """Realiza al interpolacion al moverce la ficha """

    def __init__(self, checker, to_x, to_y):
        self.checker = checker
        to = to_x, to_y
        self.moves = common.interpolate(checker.rect.topleft, to)
        self.checker.can_drag = False

    def update(self):
        try:
            self.checker.rect.topleft = self.moves.next()
        except StopIteration:
            self.checker.change_state(Normal(self.checker))

class WhenDie(State):
    """Representa la animacion de eliminación de ficha."""

    def __init__(self, checker):
        self.counter = 20
        self.checker = checker
        checker.can_drag = False
        self.last_image = checker.image
        self.center = checker.rect

    def update(self):
        self.counter -= 1

        if self.counter < 0:
            self.checker.remove_from_groups()
        else:
            zoom_factor = self.counter / 20.0
            new = pygame.transform.rotozoom(self.last_image, 0, zoom_factor)
            self.checker.image = new

            self.checker.rect = self.checker.image.get_rect()
            self.checker.rect.center = self.center.center

class Blinking(State):

    def __init__(self, checker):
        self.checker = checker
        self.counter = 100

    def update(self):
        self.counter -= 1

        if self.counter < 0:
            self.checker.change_state(Normal(self.checker))
        else:
            if self.counter % 20 < 10:
                self.checker.show_image(0)
            else:
                self.checker.show_image(1)