snake: 4eec473f445b main.py

snake

view main.py @ 169:4eec473f445b

added button work explanation in documentation.

author	Alex Martynov
date	Thu, 23 Dec 2010 20:37:13 +0300
parents	0f7df983d610
children	4a3ae22734b0

line source

1 import Tkinter as tk

2 import tkFileDialog as tkfd

3 import engine

4 import snake

8 class UI(object):

9 """User Interface:

11 Atributes:

13 - 'root' - root Window game placed at

14 - 'engine' - engine of the game

15 - 'canvas' - Widget field is pictured at

16 - 'step_id' - current step of the game

17 - 'after_id' - identificator of runing game process

18 - 'step_legth' - length of the step (in ms)

19 - 'game_length' - number of the steps in one round of the game"""

20 def __init__ (self):

21 """Create Python Battle game window.

22 Initialyze engige of the game."""

23 self.root = tk.Tk()

24 self.root.title("Python Battle")

25 self.canvas = tk.Canvas(self.root, background = "black")

26 self.canvas.pack(side ="top", fill="both", expand="yes")

27 self.buttons_pack(self.root).pack(side ="bottom", fill="both", expand="no")

28 self.step_id = 0

29 self.engine = engine.Engine(self.canvas)

30 self.after_id = None

31 self.step_length = 150

32 self.game_length = 200

33 return

35 def buttons_pack(self, root):

36 """Packing the buttons in root frame.

37 Definition of button functions.

39 'Load' - ask for snake file load

40 'Run' - runs the game/next round. Next round starts with snakes survived in previous

41 'Step' - do the next dtep of the game

42 'End' - manual end of the game

43 'Restart" - restart the field with snakes of previous round"""

44 buttons = tk.Frame(root)

45 load_1 = tk.Button(buttons, text="Load 1", command=lambda: self.load(0))

46 load_1.grid(row=1, column=2, stick="news")

47 load_2 = tk.Button(buttons, text="Load 2", command=lambda: self.load(1))

48 load_2.grid(row=2, column=3, stick="news")

49 run_b = tk.Button(buttons, text="Run", command=lambda: self.start())

50 run_b.grid(row=2, column=2, stick="news")

51 restart_b = tk.Button(buttons, text="Restart", command=lambda: self.restart(survived="no"))

52 restart_b.grid(row=1, column=5, stick="news")

53 load_3 = tk.Button(buttons, text="Load 3", command=lambda: self.load(2))

54 load_3.grid(row=3, column=2, stick="news")

55 load_4 = tk.Button(buttons, text="Load 4", command=lambda: self.load(3))

56 load_4.grid(row=2, column=1, stick="news")

57 step_b = tk.Button(buttons, text="Step", command=lambda: self.step())

58 step_b.grid(row=2, column=5, stick="news")

59 end_b = tk.Button(buttons, text="End", command=lambda: self.end())

60 end_b.grid(row=3, column=5, stick="news")

61 for column in range(1, 6):

62 buttons.grid_columnconfigure(column, weight=1)

63 return buttons

65 def load (self, snake_number):

66 """Ask for snake file loading.

67 Initialyzing snake and draw it on the field.

68 Return field back to default (without snakes) after end of the game."""

69 if self.step_id == self.game_length + 666:

70 self.step_id = 0

71 self.engine.snakes = [None, None, None, None]

72 pass

73 if self.step_id == 0:

74 file = tkfd.askopenfile(title="Open file")

75 if file == None:

76 return

77 snake = self.engine.create_snake(snake_number)

78 snake.load(file)

79 pass

80 self.engine.refill()

81 self.engine.redraw()

82 return

84 def start (self):

85 """Init running of the game."""

86 if self.step_id == self.game_length + 666:

87 self.restart(survived="yes")

88 if self.dead_snake_check() == False:

89 return

90 self.engine.psnakes = self.engine.snakes[:]

91 self.run()

93 def run (self):

94 """Run the game with 'step_length' ms step

95 After the end of the game - restarts it with snakes survived in

96 previous game"""

97 if self.step_id > self.game_length:

98 self.end()

99 return

100 self.step_id = self.step_id+1

101 self.engine.step()

102 self.after_id = self.canvas.after(self.step_length, self.run)

103 return

104

105 def step (self):

106 """Do the next game step"""

107 if self.dead_snake_check() == False:

108 return

109 if self.step_id <= self.game_length:

110 if self.after_id != None:

111 self.canvas.after_cancel(self.after_id)

112 pass

113 self.step_id = self.step_id+1

114 self.engine.step()

115 pass

116 else:

117 self.end()

118 pass

119 return

120

121 def dead_snake_check(self):

122 """Check the number of snakes alive.

123 End the game if alive snake number is less than two."""

124 dead_snakes = 0

125 for snake in self.engine.snakes:

126 if snake == None:

127 dead_snakes=dead_snakes+1

128 pass

129 if dead_snakes >= 3:

130 self.end()

131 return False

132

133 def restart(self, survived):

134 """"Restarts snakes positions after the end of the game

135

136 Options:

137 survived = "yes" - restarts next round only with snakes survived in previous round

138 survived = "no" - restart next roun with all snakes played in previous round"""

139 if survived == "yes":

140 snake_set = self.engine.snakes

141 else:

142 snake_set = self.engine.psnakes

143 self.step_id = 0

144 for i, snake in enumerate(snake_set):

145 if snake_set[i] != None:

146 self.engine.snakes[i] = snake

147 self.engine.create_snake(i, snake)

148 self.engine.refill()

149 self.engine.redraw()

150

151 def end (self):

152 """End the game and raise the window that tels about it."""

153 if self.after_id != None:

154 self.canvas.after_cancel(self.after_id)

155 pass

156 self.step_id = self.game_length + 666

157 root = tk.Tk()

158 end_label = tk.Label(root, text="End")

159 end_label.pack()

160 root.mainloop()

161 pass

162

163 if __name__ == "__main__":

164 snake_batle = UI()

165 snake_batle.root.mainloop()