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annotate pyntnclick/widgets/base.py @ 637:c27087877c84 pyntnclick

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Mouse events propagate! Crashes galore!
author Jeremy Thurgood <firxen@gmail.com>
date Sun, 12 Feb 2012 00:59:49 +0200
parents 1aac5a3b17e1
children fdc63049b08c
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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.modal = False
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17 self.parent = None
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18 self.disabled = False
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19 self.callbacks = collections.defaultdict(list)
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20
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21 def add_callback(self, eventtype, callback, *args):
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22 self.callbacks[eventtype].append((callback, args))
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23
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24 def event(self, ev):
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25 "Don't override this without damn good reason"
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26 if self.disabled:
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27 return True
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28
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29 type_ = ev.type
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30 if type_ == USEREVENT:
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31 for k in self.callbacks.iterkeys():
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32 if (isinstance(k, type) and issubclass(k, UserEvent)
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33 and k.matches(ev)):
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34 type_ = k
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35 break
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36
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37 for callback, args in self.callbacks[type_]:
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38 if callback(ev, self, *args):
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39 return True
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40 return False
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41
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42 def draw(self, surface):
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43 "Override me"
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44 pass
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45
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46 def disable(self):
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47 if not self.disabled:
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48 self.disabled = True
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49 if hasattr(self, 'prepare'):
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50 self.prepare()
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51
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52 def enable(self):
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53 if self.disabled:
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54 self.disabled = False
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55 if hasattr(self, 'prepare'):
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56 self.prepare()
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57
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58
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59 class Button(Widget):
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60
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61 def event(self, ev):
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62 if super(Button, self).event(ev):
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63 return True
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64 if ev.type == MOUSEBUTTONDOWN:
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65 for callback, args in self.callbacks['clicked']:
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66 if callback(ev, self, *args):
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67 return True
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68 return False
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69
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70 def forced_click(self):
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71 """Force calling the clicked handler"""
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72 for callback, args in self.callbacks['clicked']:
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73 if callback(None, self, *args):
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74 return True
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75 return False
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76
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77
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78 class Container(Widget):
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79
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80 def __init__(self, rect=None):
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81 if rect is None:
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82 rect = pygame.Rect(0, 0, 0, 0)
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83 super(Container, self).__init__(rect)
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84 self.children = []
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85
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86 def event(self, ev):
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87 """Push an event down through the tree, and fire our own event as a
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88 last resort
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89 """
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90 if ev.type in (MOUSEMOTION, MOUSEBUTTONUP, MOUSEBUTTONDOWN):
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91 for child in self.children[:]:
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92 if child.rect.collidepoint(ev.pos):
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93 if child.event(ev):
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94 return True
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95
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96 else:
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97 # Other events go to all children first
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98 for child in self.children[:]:
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99 if child.event(ev):
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100 return True
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101 if super(Container, self).event(ev):
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102 return True
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103
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104 def add(self, widget):
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105 widget.parent = self
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106 self.children.append(widget)
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107 self.rect = self.rect.union(widget.rect)
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108
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109 def remove(self, widget):
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110 widget.parent = None
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111 self.children.remove(widget)
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112
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113 def draw(self, surface):
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114 for child in self.children:
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115 child.draw(surface)
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116
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117
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118 class GridContainer(Container):
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119 """Hacky container that only supports grids, won't work with Container
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120 children, or modal children.
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121 """
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122
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123 def __init__(self, width, rect=None):
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124 super(GridContainer, self).__init__(rect)
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125 self.width = width
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126
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127 def add(self, widget):
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128 assert not isinstance(widget, Container)
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129 assert not widget.modal
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130 super(GridContainer, self).add(widget)
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131
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132
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133 class Box(Container):
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134 """A container that draws a filled background with a border"""
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135 padding = 4
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136
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137 def draw(self, surface):
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138 expandrect = self.rect.move((-self.padding, -self.padding))
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139 expandrect.width = self.rect.width + 2 * self.padding
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140 expandrect.height = self.rect.height + 2 * self.padding
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141 border = pygame.Surface(expandrect.size, SRCALPHA)
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142 border.fill(pygame.Color('black'))
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diff changeset
143 surface.blit(border, expandrect)
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
144 background = pygame.Surface(self.rect.size, SRCALPHA)
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
145 background.fill(pygame.Color('gray'))
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
146 surface.blit(background, self.rect)
c0474fe18b96 Copy in widgets from mamba (currently unused)
Stefano Rivera <stefano@rivera.za.net>
parents:
diff changeset
147 super(Box, self).draw(surface)