Mercurial > boomslang

comparison gamelib/state.py @ 120:48d24a48d0ce

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Enter and leave hooks
author Neil Muller <neil@dip.sun.ac.za>
date Tue, 24 Aug 2010 17:24:54 +0200
parents d5f7cccfdb6c
children 97322b78d1c1
comparison
equal deleted inserted replaced
119:d5f7cccfdb6c 120:48d24a48d0ce
28 #state.load_scenes("mess") 28 #state.load_scenes("mess")
29 #state.load_scenes("engine") 29 #state.load_scenes("engine")
30 #state.load_scenes("machine") 30 #state.load_scenes("machine")
31 #state.load_scenes("map") 31 #state.load_scenes("map")
32 state.set_current_scene("cryo") 32 state.set_current_scene("cryo")
33 state.set_do_enter_leave()
33 return state 34 return state
34 35
35 36
36 class State(object): 37 class State(object):
37 """Complete game state. 38 """Complete game state.
55 self.tool = None 56 self.tool = None
56 # current scene 57 # current scene
57 self.current_scene = None 58 self.current_scene = None
58 # current detail view 59 # current detail view
59 self.current_detail = None 60 self.current_detail = None
61 # scene we came from, for enter and leave processing
62 self.previous_scene = None
63 # scene transion helpers
64 self.do_check = None
65 self.old_pos = None
60 66
61 def add_scene(self, scene): 67 def add_scene(self, scene):
62 self.scenes[scene.name] = scene 68 self.scenes[scene.name] = scene
63 69
64 def add_detail_view(self, detail_view): 70 def add_detail_view(self, detail_view):
74 if hasattr(mod, 'DETAIL_VIEWS'): 80 if hasattr(mod, 'DETAIL_VIEWS'):
75 for scene_cls in mod.DETAIL_VIEWS: 81 for scene_cls in mod.DETAIL_VIEWS:
76 self.add_detail_view(scene_cls(self)) 82 self.add_detail_view(scene_cls(self))
77 83
78 def set_current_scene(self, name): 84 def set_current_scene(self, name):
85 old_scene = self.current_scene
79 self.current_scene = self.scenes[name] 86 self.current_scene = self.scenes[name]
87 if old_scene and old_scene != self.current_scene:
88 self.previous_scene = old_scene
89 self.set_do_enter_leave()
80 90
81 def set_current_detail(self, name): 91 def set_current_detail(self, name):
82 if name is None: 92 if name is None:
83 self.current_detail = None 93 self.current_detail = None
84 else: 94 else:
96 106
97 def set_tool(self, item): 107 def set_tool(self, item):
98 self.tool = item 108 self.tool = item
99 109
100 def draw(self, surface): 110 def draw(self, surface):
101 self.current_scene.draw(surface) 111 if self.do_check and self.previous_scene and self.do_check == constants.LEAVE:
112 # We still need to handle leave events, so still display the scene
113 self.previous_scene.draw(surface)
114 else:
115 self.current_scene.draw(surface)
102 116
103 def draw_detail(self, surface): 117 def draw_detail(self, surface):
104 self.current_detail.draw(surface) 118 self.current_detail.draw(surface)
105 119
106 def interact(self, pos): 120 def interact(self, pos):
108 122
109 def interact_detail(self, pos): 123 def interact_detail(self, pos):
110 return self.current_detail.interact(self.tool, pos) 124 return self.current_detail.interact(self.tool, pos)
111 125
112 def animate(self): 126 def animate(self):
113 return self.current_scene.animate() 127 if not self.do_check:
128 return self.current_scene.animate()
129
130 def check_enter_leave(self):
131 if not self.do_check:
132 return None
133 if self.do_check == constants.LEAVE:
134 self.do_check = constants.ENTER
135 if self.previous_scene:
136 return self.previous_scene.leave()
137 return None
138 elif self.do_check == constants.ENTER:
139 self.do_check = None
140 # Fix descriptions, etc.
141 if self.old_pos:
142 self.current_scene.mouse_move(self.tool, self.old_pos)
143 return self.current_scene.enter()
144 raise RuntimeError('invalid do_check value %s' % self.do_check)
114 145
115 def mouse_move(self, pos): 146 def mouse_move(self, pos):
116 self.current_scene.mouse_move(self.tool, pos) 147 self.current_scene.mouse_move(self.tool, pos)
148 # So we can do sensible things on enter and leave
149 self.old_pos = pos
150
151 def set_do_enter_leave(self):
152 """Flag that we need to run the enter loop"""
153 self.do_check = constants.LEAVE
117 154
118 def mouse_move_detail(self, pos): 155 def mouse_move_detail(self, pos):
119 self.current_detail.mouse_move(self.tool, pos) 156 self.current_detail.mouse_move(self.tool, pos)
120 157
121 158
223 result = False 260 result = False
224 for thing in self.things.itervalues(): 261 for thing in self.things.itervalues():
225 if thing.animate(): 262 if thing.animate():
226 result = True 263 result = True
227 return result 264 return result
265
266 def enter(self):
267 return None
268
269 def leave(self):
270 self._current_description = None
271 return None
228 272
229 def mouse_move(self, item, pos): 273 def mouse_move(self, item, pos):
230 """Call to check whether the cursor has entered / exited a thing. 274 """Call to check whether the cursor has entered / exited a thing.
231 275
232 Item may be an item in the list of items or None for the hand. 276 Item may be an item in the list of items or None for the hand.