Mercurial > mamba
annotate mamba/widgets/base.py @ 77:2aa652b92449
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| author | Stefano Rivera <stefano@rivera.za.net> |
|---|---|
| date | Sun, 11 Sep 2011 18:30:19 +0200 |
| parents | 3cc917814579 |
| children | 7a17c5b74148 |
| rev | line source |
|---|---|
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671d027f1b71
Callbacks for events in widgets
Stefano Rivera <stefano@rivera.za.net>
parents:
43
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1 import collections |
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671d027f1b71
Callbacks for events in widgets
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parents:
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2 |
| 23 | 3 import pygame |
| 77 | 4 from pygame.constants import K_UP, K_DOWN |
| 58 | 5 from pygame.locals import MOUSEMOTION, MOUSEBUTTONUP, MOUSEBUTTONDOWN, KEYDOWN |
| 23 | 6 |
| 7 | |
| 8 class Widget(object): | |
| 9 | |
| 10 def __init__(self, rect): | |
| 38 | 11 if not isinstance(rect, pygame.Rect): |
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12 rect = pygame.Rect(rect, (0, 0)) |
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13 self.rect = rect |
| 58 | 14 self.focussable = False |
| 77 | 15 self.focussed = False |
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671d027f1b71
Callbacks for events in widgets
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parents:
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16 self.callbacks = collections.defaultdict(list) |
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671d027f1b71
Callbacks for events in widgets
Stefano Rivera <stefano@rivera.za.net>
parents:
43
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changeset
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17 |
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671d027f1b71
Callbacks for events in widgets
Stefano Rivera <stefano@rivera.za.net>
parents:
43
diff
changeset
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18 def add_callback(self, eventtype, callback, *args): |
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671d027f1b71
Callbacks for events in widgets
Stefano Rivera <stefano@rivera.za.net>
parents:
43
diff
changeset
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19 self.callbacks[eventtype].append((callback, args)) |
| 23 | 20 |
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Container subclasses Widget
Stefano Rivera <stefano@rivera.za.net>
parents:
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21 def event(self, ev): |
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3cc917814579
Container subclasses Widget
Stefano Rivera <stefano@rivera.za.net>
parents:
58
diff
changeset
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22 for callback, args in self.callbacks[ev.type]: |
| 77 | 23 if callback(ev, self, *args): |
| 24 return True | |
| 25 return False | |
| 23 | 26 |
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Refactor widgets *again*, add container to Habitat
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27 def draw(self, surface): |
| 23 | 28 "Override me" |
| 29 pass | |
| 30 | |
| 31 | |
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32 class Container(Widget): |
| 23 | 33 |
| 77 | 34 def __init__(self, rect, root=False): |
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Container subclasses Widget
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parents:
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35 super(Container, self).__init__(rect) |
| 23 | 36 self.children = [] |
| 77 | 37 self.root = root |
| 38 self.focussed = root | |
| 39 self.focussable = True | |
| 40 self.focussed_child = None | |
| 23 | 41 |
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Container subclasses Widget
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parents:
58
diff
changeset
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42 def event(self, ev): |
| 77 | 43 """Push an event down through the tree, and fire our own event as a |
| 44 last resort | |
| 45 """ | |
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Container subclasses Widget
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parents:
58
diff
changeset
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46 if ev.type in (MOUSEMOTION, MOUSEBUTTONUP, MOUSEBUTTONDOWN): |
| 58 | 47 for child in self.children: |
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parents:
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48 if child.rect.collidepoint(ev.pos): |
| 77 | 49 if child.event(ev): |
| 50 return True | |
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parents:
58
diff
changeset
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51 if ev.type == KEYDOWN: |
| 58 | 52 for child in self.children: |
| 77 | 53 if child.focussed: |
| 54 if child.event(ev): | |
| 55 return True | |
| 56 if super(Container, self).event(ev): | |
| 57 return True | |
| 58 if self.root and ev.type == KEYDOWN and ev.key in (K_UP, K_DOWN): | |
| 59 self.adjust_focus(1 if ev.key == K_DOWN else -1) | |
| 23 | 60 |
| 61 def add(self, widget): | |
| 77 | 62 widget.parent = self |
| 23 | 63 self.children.append(widget) |
| 64 | |
| 77 | 65 def adjust_focus(self, direction): |
| 66 """Try and adjust focus in direction (integer) | |
| 67 """ | |
| 68 if self.focussed_child is not None: | |
| 69 child = self.children[self.focussed_child] | |
| 70 if isinstance(child, Container): | |
| 71 if child.adjust_focus(direction): | |
| 72 return True | |
| 73 child.focussed = False | |
| 74 | |
| 75 current = self.focussed_child | |
| 76 if current is None: | |
| 77 current = -1 if direction > 0 else len(self.children) | |
| 78 if direction > 0: | |
| 79 possibles = list(enumerate(self.children))[current + 1:] | |
| 80 else: | |
| 81 possibles = list(enumerate(self.children))[:current] | |
| 82 possibles.reverse() | |
| 83 for i, child in possibles: | |
| 84 if child.focussable: | |
| 85 child.focussed = True | |
| 86 if isinstance(child, Container): | |
| 87 if child.adjust_focus(direction): | |
| 88 self.focussed_child = i | |
| 89 return True | |
| 90 child.focussed = False | |
| 91 continue | |
| 92 else: | |
| 93 self.focussed_child = i | |
| 94 child.focussed = True | |
| 95 return True | |
| 96 else: | |
| 97 return False | |
| 98 | |
| 23 | 99 def draw(self, surface): |
| 100 for child in self.children: | |
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24
30d4f3e62bcf
Refactor widgets *again*, add container to Habitat
Stefano Rivera <stefano@rivera.za.net>
parents:
23
diff
changeset
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101 child.draw(surface) |