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annotate pyntnclick/widgets/base.py @ 559:b7d8b89de71a pyntnclick

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Rip out keyboard handling
author Stefano Rivera <stefano@rivera.za.net>
date Sat, 11 Feb 2012 14:42:24 +0200
parents f9f04cb35697
children 1aac5a3b17e1
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1 import collections
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2
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3 import pygame
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4 from pygame.locals import (MOUSEBUTTONDOWN, MOUSEBUTTONUP,
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5 MOUSEMOTION, SRCALPHA, USEREVENT)
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6
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f9f04cb35697 s/mamba/pyntnclick/
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7 from pyntnclick.engine import UserEvent
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8
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9
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10 class Widget(object):
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11
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12 def __init__(self, rect):
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13 if not isinstance(rect, pygame.Rect):
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14 rect = pygame.Rect(rect, (0, 0))
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15 self.rect = rect
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16 self.focussable = False
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17 self.focussed = False
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18 self.modal = False
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19 self.parent = None
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20 self.disabled = False
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21 self.callbacks = collections.defaultdict(list)
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22
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23 def add_callback(self, eventtype, callback, *args):
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24 self.callbacks[eventtype].append((callback, args))
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25
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26 def event(self, ev):
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27 "Don't override this without damn good reason"
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28 if self.disabled:
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29 return True
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30
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31 type_ = ev.type
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32 if type_ == USEREVENT:
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33 for k in self.callbacks.iterkeys():
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34 if (isinstance(k, type) and issubclass(k, UserEvent)
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35 and k.matches(ev)):
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36 type_ = k
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37 break
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38
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39 for callback, args in self.callbacks[type_]:
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40 if callback(ev, self, *args):
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41 return True
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42 return False
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43
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44 def draw(self, surface):
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45 "Override me"
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46 pass
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47
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48 def grab_focus(self):
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49 if self.focussable:
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50 # Find the root and current focus
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51 root = self
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52 while root.parent is not None:
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53 root = root.parent
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54 focus = root
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55 focus_modal_base = None
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56 while (isinstance(focus, Container)
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57 and focus.focussed_child is not None):
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58 if focus.modal:
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59 focus_modal_base = focus
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60 focus = focus.children[focus.focussed_child]
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61
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62 # Don't leave a modal heirarchy
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63 if focus_modal_base:
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64 widget = self
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65 while widget.parent is not None:
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66 if widget == focus_modal_base:
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67 break
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68 widget = widget.parent
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69 else:
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70 return False
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71
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72 root.defocus()
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73 widget = self
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74 while widget.parent is not None:
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75 parent = widget.parent
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76 if isinstance(parent, Container):
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77 idx = parent.children.index(widget)
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78 parent.focussed_child = idx
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79 widget = parent
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80 self.focussed = True
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81 return True
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82 return False
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83
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84 def disable(self):
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85 if not self.disabled:
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86 self.disabled = True
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87 self._focussable_when_enabled = self.focussable
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88 self.focussable = False
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89 if hasattr(self, 'prepare'):
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90 self.prepare()
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91
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92 def enable(self):
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93 if self.disabled:
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94 self.disabled = False
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95 self.focussable = self._focussable_when_enabled
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96 if hasattr(self, 'prepare'):
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97 self.prepare()
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98
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99
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100 class Button(Widget):
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101
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102 def event(self, ev):
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103 if super(Button, self).event(ev):
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104 return True
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105 if ev.type == MOUSEBUTTONDOWN:
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106 for callback, args in self.callbacks['clicked']:
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107 if callback(ev, self, *args):
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108 return True
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109 return False
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110
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111 def forced_click(self):
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112 """Force calling the clicked handler"""
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113 self.grab_focus()
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114 for callback, args in self.callbacks['clicked']:
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115 if callback(None, self, *args):
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116 return True
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117 return False
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118
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119
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120 class Container(Widget):
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121
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122 def __init__(self, rect=None):
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123 if rect is None:
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124 rect = pygame.Rect(0, 0, 0, 0)
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125 super(Container, self).__init__(rect)
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126 self.children = []
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127 self.focussed_child = None
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128
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129 def event(self, ev):
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130 """Push an event down through the tree, and fire our own event as a
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131 last resort
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132 """
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133 if ev.type in (MOUSEMOTION, MOUSEBUTTONUP, MOUSEBUTTONDOWN):
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134 for child in self.children[:]:
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135 if child.rect.collidepoint(ev.pos):
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136 if ev.type == MOUSEBUTTONDOWN and child.focussable:
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137 if not child.grab_focus():
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138 continue
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139 if child.event(ev):
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140 return True
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141
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142 else:
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diff changeset
143 # Other events go to all children first
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parents:
diff changeset
144 for child in self.children[:]:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
145 if child.event(ev):
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parents:
diff changeset
146 return True
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
147 if super(Container, self).event(ev):
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parents:
diff changeset
148 return True
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parents:
diff changeset
149
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parents:
diff changeset
150 def add(self, widget):
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parents:
diff changeset
151 widget.parent = self
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
152 self.children.append(widget)
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
153 self.rect = self.rect.union(widget.rect)
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parents:
diff changeset
154
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parents:
diff changeset
155 def remove(self, widget):
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parents:
diff changeset
156 widget.parent = None
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
157 if self.focussed_child is not None:
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parents:
diff changeset
158 child = self.children[self.focussed_child]
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
159 self.children.remove(widget)
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parents:
diff changeset
160 # We don't update the rect, for reasons of simplificty and laziness
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parents:
diff changeset
161 if self.focussed_child is not None and child in self.children:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
162 # Fix focus index
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parents:
diff changeset
163 self.focussed_child = self.children.index(child)
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parents:
diff changeset
164 else:
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parents:
diff changeset
165 self.focussed_child = None
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parents:
diff changeset
166
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parents:
diff changeset
167 def defocus(self):
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parents:
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168 if self.focussed_child is not None:
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parents:
diff changeset
169 child = self.children[self.focussed_child]
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
170 if isinstance(child, Container):
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
171 if not child.defocus():
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
172 return False
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parents:
diff changeset
173 child.focussed = False
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parents:
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174 self.focussed_child = None
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Stefano Rivera <stefano@rivera.za.net>
parents:
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175 return True
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parents:
diff changeset
176
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parents:
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177 def adjust_focus(self, direction):
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parents:
diff changeset
178 """Try and adjust focus in direction (integer)
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Stefano Rivera <stefano@rivera.za.net>
parents:
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179 """
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parents:
diff changeset
180 if self.focussed_child is not None:
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parents:
diff changeset
181 child = self.children[self.focussed_child]
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
182 if isinstance(child, Container):
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
183 if child.adjust_focus(direction):
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
184 return True
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
185 elif child.modal:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
186 # We're modal, go back
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
187 if child.adjust_focus(-direction):
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Stefano Rivera <stefano@rivera.za.net>
parents:
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188 return True
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
189 else:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
190 child.focussed = False
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
191
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parents:
diff changeset
192 current = self.focussed_child
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
193 if current is None:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
194 current = -1 if direction > 0 else len(self.children)
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
195 if direction > 0:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
196 possibles = list(enumerate(self.children))[current + 1:]
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
197 else:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
198 possibles = list(enumerate(self.children))[:current]
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
199 possibles.reverse()
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
200 for i, child in possibles:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
201 if child.focussable:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
202 child.focussed = True
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
203 self.focussed_child = i
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
204 return True
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
205 if isinstance(child, Container):
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
206 if child.adjust_focus(direction):
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
207 self.focussed_child = i
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
208 return True
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
209 else:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
210 if self.parent is None:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
211 if self.focussed_child is not None:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
212 # At the end, mark the last one as focussed, again
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
213 child = self.children[self.focussed_child]
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
214 if isinstance(child, Container):
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
215 if child.adjust_focus(-direction):
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
216 return True
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
217 else:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
218 child.focussed = True
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
219 return True
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
220 else:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
221 self.focussed_child = None
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
222 return False
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
223
c0474fe18b96 Copy in widgets from mamba (currently unused)
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parents:
diff changeset
224 def draw(self, surface):
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parents:
diff changeset
225 if self.parent is None and not self.focussed:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
226 self.focussed = True
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
227 self.adjust_focus(1)
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
228 for child in self.children:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
229 child.draw(surface)
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
230
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
231
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
232 class GridContainer(Container):
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
233 """Hacky container that only supports grids, won't work with Container
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
234 children, or modal children.
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
235 """
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
236
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
237 def __init__(self, width, rect=None):
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
238 super(GridContainer, self).__init__(rect)
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
239 self.width = width
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
240
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
241 def add(self, widget):
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
242 assert not isinstance(widget, Container)
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
243 assert not widget.modal
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
244 super(GridContainer, self).add(widget)
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
245
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
246 def adjust_focus(self, direction):
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
247 if isinstance(direction, int):
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
248 direction = (direction, 0)
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
249
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
250 if len(self.children) == 0:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
251 return False
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
252
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
253 if self.focussed_child is None:
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
254 if sum(direction) > 0:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
255 self.focussed_child = 0
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
256 else:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
257 self.focussed_child = len(self.children) - 1
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
258 else:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
259 self.children[self.focussed_child].focussed = False
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
260 if direction[0] != 0:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
261 self.focussed_child += direction[0]
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
262 if direction[1] != 0:
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
263 self.focussed_child += self.width * direction[1]
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
264 if not 0 <= self.focussed_child < len(self.children):
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
265 self.focussed_child = None
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
266 return False
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
267 self.children[self.focussed_child].focussed = True
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
268 return True
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
269
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
270
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
271 class Box(Container):
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
272 """A container that draws a filled background with a border"""
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
273 padding = 4
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
274
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
275 def draw(self, surface):
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
276 expandrect = self.rect.move((-self.padding, -self.padding))
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
277 expandrect.width = self.rect.width + 2 * self.padding
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
278 expandrect.height = self.rect.height + 2 * self.padding
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
279 border = pygame.Surface(expandrect.size, SRCALPHA)
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
280 border.fill(pygame.Color('black'))
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
281 surface.blit(border, expandrect)
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
282 background = pygame.Surface(self.rect.size, SRCALPHA)
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Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
283 background.fill(pygame.Color('gray'))
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
284 surface.blit(background, self.rect)
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
285 super(Box, self).draw(surface)