Mercurial > boomslang
annotate pyntnclick/widgets/base.py @ 559:b7d8b89de71a pyntnclick
Rip out keyboard handling
author | Stefano Rivera <stefano@rivera.za.net> |
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date | Sat, 11 Feb 2012 14:42:24 +0200 |
parents | f9f04cb35697 |
children | 1aac5a3b17e1 |
rev | line source |
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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 |
558 | 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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143 # Other events go to all children first |
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144 for child in self.children[:]: |
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145 if child.event(ev): |
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146 return True |
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147 if super(Container, self).event(ev): |
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148 return True |
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149 |
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150 def add(self, widget): |
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151 widget.parent = self |
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152 self.children.append(widget) |
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153 self.rect = self.rect.union(widget.rect) |
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154 |
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155 def remove(self, widget): |
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156 widget.parent = None |
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157 if self.focussed_child is not None: |
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158 child = self.children[self.focussed_child] |
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159 self.children.remove(widget) |
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160 # We don't update the rect, for reasons of simplificty and laziness |
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161 if self.focussed_child is not None and child in self.children: |
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162 # Fix focus index |
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163 self.focussed_child = self.children.index(child) |
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164 else: |
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165 self.focussed_child = None |
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166 |
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167 def defocus(self): |
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168 if self.focussed_child is not None: |
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169 child = self.children[self.focussed_child] |
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170 if isinstance(child, Container): |
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171 if not child.defocus(): |
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172 return False |
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173 child.focussed = False |
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174 self.focussed_child = None |
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175 return True |
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176 |
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177 def adjust_focus(self, direction): |
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178 """Try and adjust focus in direction (integer) |
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179 """ |
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180 if self.focussed_child is not None: |
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181 child = self.children[self.focussed_child] |
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182 if isinstance(child, Container): |
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183 if child.adjust_focus(direction): |
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184 return True |
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185 elif child.modal: |
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186 # We're modal, go back |
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187 if child.adjust_focus(-direction): |
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188 return True |
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189 else: |
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190 child.focussed = False |
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191 |
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192 current = self.focussed_child |
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193 if current is None: |
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194 current = -1 if direction > 0 else len(self.children) |
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195 if direction > 0: |
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196 possibles = list(enumerate(self.children))[current + 1:] |
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197 else: |
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198 possibles = list(enumerate(self.children))[:current] |
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199 possibles.reverse() |
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200 for i, child in possibles: |
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201 if child.focussable: |
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202 child.focussed = True |
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203 self.focussed_child = i |
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204 return True |
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205 if isinstance(child, Container): |
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206 if child.adjust_focus(direction): |
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207 self.focussed_child = i |
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208 return True |
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209 else: |
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210 if self.parent is None: |
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211 if self.focussed_child is not None: |
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212 # At the end, mark the last one as focussed, again |
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213 child = self.children[self.focussed_child] |
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214 if isinstance(child, Container): |
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215 if child.adjust_focus(-direction): |
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216 return True |
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217 else: |
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218 child.focussed = True |
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219 return True |
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220 else: |
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221 self.focussed_child = None |
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222 return False |
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223 |
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224 def draw(self, surface): |
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225 if self.parent is None and not self.focussed: |
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226 self.focussed = True |
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227 self.adjust_focus(1) |
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228 for child in self.children: |
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229 child.draw(surface) |
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230 |
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231 |
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232 class GridContainer(Container): |
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233 """Hacky container that only supports grids, won't work with Container |
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234 children, or modal children. |
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235 """ |
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236 |
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237 def __init__(self, width, rect=None): |
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238 super(GridContainer, self).__init__(rect) |
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239 self.width = width |
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240 |
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241 def add(self, widget): |
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242 assert not isinstance(widget, Container) |
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243 assert not widget.modal |
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244 super(GridContainer, self).add(widget) |
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245 |
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246 def adjust_focus(self, direction): |
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247 if isinstance(direction, int): |
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248 direction = (direction, 0) |
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249 |
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250 if len(self.children) == 0: |
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251 return False |
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252 |
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253 if self.focussed_child is None: |
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254 if sum(direction) > 0: |
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255 self.focussed_child = 0 |
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256 else: |
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257 self.focussed_child = len(self.children) - 1 |
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258 else: |
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259 self.children[self.focussed_child].focussed = False |
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260 if direction[0] != 0: |
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261 self.focussed_child += direction[0] |
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262 if direction[1] != 0: |
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263 self.focussed_child += self.width * direction[1] |
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264 if not 0 <= self.focussed_child < len(self.children): |
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265 self.focussed_child = None |
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266 return False |
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267 self.children[self.focussed_child].focussed = True |
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268 return True |
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269 |
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270 |
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271 class Box(Container): |
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272 """A container that draws a filled background with a border""" |
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273 padding = 4 |
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274 |
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275 def draw(self, surface): |
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276 expandrect = self.rect.move((-self.padding, -self.padding)) |
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277 expandrect.width = self.rect.width + 2 * self.padding |
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278 expandrect.height = self.rect.height + 2 * self.padding |
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279 border = pygame.Surface(expandrect.size, SRCALPHA) |
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280 border.fill(pygame.Color('black')) |
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281 surface.blit(border, expandrect) |
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282 background = pygame.Surface(self.rect.size, SRCALPHA) |
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283 background.fill(pygame.Color('gray')) |
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284 surface.blit(background, self.rect) |
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285 super(Box, self).draw(surface) |