7 构建2048游戏
game.kv
#:set padding 20 FloatLayout: Board: id:board pos_hint:{'center_x':0.5,'center_y':0.5} size_hint:(None,None) center:root.center size:[min(root.width,root.height)- 2 * padding]*2: canvas: Color: rgb:self.color BorderImage: pos:self.pos size:self.size source:'cell.png' Label: pos:root.pos size:root.size bold:True color:root.number_color font_size:root.font_size text:str(root.number)
main.py
import random
from kivy.app import App
from kivy.animation import Animation
from kivy.graphics import Color,BorderImage
from kivy.properties import ListProperty,NumericProperty
from kivy.uix.widget import Widget
from kivy.vector import Vector
from kivy.core.window import Window,Keyboard
from kivy.utils import get_color_from_hex
spacing = 15
colors = ('eee4da', 'ede0c8', 'f2b179', 'f59563','f67c5f', 'f65e3b', 'edcf72',
'edcc61','edc850', 'edc53f', 'edc22e')
tile_colors = {2**i:color for i,color in
enumerate(colors,start=1)}
key_vectors = {
Keyboard.keycodes['up']:(0,1),
Keyboard.keycodes['right']:(1,0),
Keyboard.keycodes['down']:(0,-1),
Keyboard.keycodes['left']:(-1,0),
}
class Tile(Widget): #方块类
font_size = NumericProperty(24)
number = NumericProperty(2)
color = ListProperty(get_color_from_hex(tile_colors[2]))
number_color = ListProperty(get_color_from_hex('776e65'))
def __init__(self,number=2,**kwargs): #初始化
super(Tile, self).__init__(**kwargs)
self.font_size = 0.5 * self.width
self.number = number
self.update_colors()
def update_colors(self): #更新颜色
self.color = get_color_from_hex(tile_colors[self.number])
if self.number > 4 :
self.number_color = get_color_from_hex('f9f6f2')
def resize(self,pos,size): #计算大小和位置
self.pos = pos
self.size = size
self.font_size = 0.5 * self.width
def all_cells(flip_x=False,flip_y=False): #遍历所有表格
for x in (reversed(range(4)) if flip_x else range(4)):
for y in (reversed(range(4)) if flip_y else range(4)):
yield (x,y)
class Board(Widget): #棋盘类
b = None
moving = False
def __init__(self,**kwargs): #初始化
super(Board,self).__init__(**kwargs)
self.resize()
def reset(self): #重置
self.b = [[None for i in range(4)] for j in range(4)]
self.new_tile()
self.new_tile()
def new_tile(self, *args): #生成一个新方块
empty_cells = [(x, y) for x, y in all_cells()
if self.b[x][y] is None]
if not empty_cells:
print('Game over(tentative:no cells)')
return
x,y = random.choice(empty_cells)
tile = Tile(pos = self.cell_pos(x,y),
size = self.cell_size)
self.b[x][y] = tile
self.add_widget(tile)
if len(empty_cells) == 1 and self.is_deadlocked():
print('Grame over (board is deadlocked)')
self.moving = False
def is_deadlocked(self):
for x,y in all_cells():
if self.b[x][y] is None:
return False
number = self.b[x][y].number
if self.can_combine(x + 1, y, number) or \
self.can_combine(x,y+1,number):
return False
return True
def move(self,dir_x,dir_y): #移动方块
if self.moving:
return
dir_x = int(dir_x)
dir_y = int(dir_y)
for board_x, board_y in all_cells(dir_x > 0,dir_y > 0):
tile = self.b[board_x][board_y]
if not tile:
continue
x,y = board_x,board_y
while self.can_move(x+dir_x,y+dir_y):
self.b[x][y] = None
x += dir_x
y += dir_y
self.b[x][y] = tile
if self.can_combine(x+dir_x,y+dir_y,tile.number):
self.b[x][y] = None
x += dir_x
y += dir_y
self.remove_widget(self.b[x][y])
self.b[x][y] = tile
tile.number *= 2
if(tile.number == 2048):
print('You win the game')
tile.update_colors()
if x == board_x and y == board_y:
continue
anim = Animation(pos = self.cell_pos(x,y),duration=0.25,
transition='linear')
if not self.moving:
anim.on_complete = self.new_tile
self.moving = True
anim.start(tile)
def cell_pos(self, board_x, board_y): #方块位置
return (self.x + board_x * (self.cell_size[0] + spacing) + spacing,
self.y + board_y * (self.cell_size[1] + spacing) + spacing)
def valid_cell(self,board_x,board_y): #判断是否可以移动
return (board_x >= 0 and board_y >= 0 and board_x <=3 and board_y <=3)
def can_move(self,board_x,board_y): #判断移动
return (self.valid_cell(board_x, board_y) and self.b[board_x][board_y] is None)
def can_combine(self,board_x,board_y,number): #判断合并
return (self.valid_cell(board_x,board_y) and
self.b[board_x][board_y] is not None and
self.b[board_x][board_y].number == number)
def resize(self,*args): #初始化尺寸
self.cell_size = (0.25*(self.width-5*spacing),)*2
self.canvas.before.clear()
with self.canvas.before:
BorderImage(pos = self.pos,size = self.size,source='board.png')
Color(*get_color_from_hex('ccc0b4'))
for board_x,board_y in all_cells():
BorderImage(pos=self.cell_pos(board_x,board_y),
size=self.cell_size,source='cell.png')
if not self.b:
return
for board_x,board_y in all_cells():
tile = self.b[board_x][board_y]
if tile:
tile.resize(pos=self.cell_pos(board_x,board_y),
size=self.cell_size)
def on_key_down(self,window,key,*args): #触发事件,回调函数
if key in key_vectors:
self.move(*key_vectors[key])
def on_touch_up(self, touch): #触发事件,回调函数
"""判断是否滑动"""
v = Vector(touch.pos) - Vector(touch.opos)
if v.length() < 20:
return
# 比较绝对值
if abs(v.x) > abs(v.y):
v.y = 0
else:
v.x = 0
# 移动
self.move(*v.normalize())
on_pos = resize
on_size = resize
class GameApp(App):
def build(self):
# 通过id获取到FloatLayout布局中的Board
board = self.root.ids.board
board.reset()
Window.bind(on_key_down = board.on_key_down)
if __name__ == '__main__':
Window.clearcolor = get_color_from_hex('faf8ef')
GameApp().run() #启动应用程序