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annotate gamelib/savegame.py @ 486:8897a436a8cb

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Factor out save game logic and (new, simplified) dialogs into their own module. Add preferences folder to concept to config. Save games under preferences folder.
author Simon Cross <hodgestar@gmail.com>
date Wed, 25 Nov 2009 21:50:54 +0000
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children 75ef6ea3b7a6
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486
8897a436a8cb Factor out save game logic and (new, simplified) dialogs into their own module. Add preferences folder to concept to config. Save games under preferences folder.
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1 """Utilities and widgets for saving and restoring games."""
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2
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3 import xmlrpclib
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4 import os
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5
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6 from pgu import gui
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7
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8 import config
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9 import version
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10
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11
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12 class BaseSaveRestoreDialog(gui.Dialog):
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13 """Save game dialog."""
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14
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15 def __init__(self, title_txt, button_txt, allow_new, cls="dialog"):
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16 self.value = None
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17 self.save_folder = config.config.save_folder
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18
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19 self.save_games = {}
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20 self._populate_save_games()
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21
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22 if allow_new:
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23 self.name_input = gui.Input()
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24 else:
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25 self.name_input = None
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26
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27 td_style = {
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28 'padding_left': 4,
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29 'padding_right': 4,
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30 'padding_top': 2,
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31 'padding_bottom': 2,
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32 }
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33
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34 self.save_list = gui.List(width=350, height=250)
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35 games = self.save_games.keys()
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36 games.sort()
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37 for name in games:
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38 self.save_list.add(name, value=name)
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39 self.save_list.set_vertical_scroll(0)
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40 self.save_list.connect(gui.CHANGE, self._save_list_change)
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41
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42 button_ok = gui.Button(button_txt)
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43 button_ok.connect(gui.CLICK, self._click_ok)
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44
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45 button_cancel = gui.Button("Cancel")
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46 button_cancel.connect(gui.CLICK, self._click_cancel)
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47
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48 body = gui.Table()
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49 body.tr()
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50 body.td(self.save_list, style=td_style, colspan=2)
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51 body.td(gui.Label("Image"), style=td_style, colspan=2)
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52 body.tr()
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53 if self.name_input:
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54 body.td(gui.Label("Save as:"), style=td_style, align=1)
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55 body.td(self.name_input, style=td_style)
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56 else:
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57 body.td(gui.Spacer(0, 0), style=td_style, colspan=2)
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58 body.td(button_ok, style=td_style, align=1)
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59 body.td(button_cancel, style=td_style, align=1)
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60
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61 title = gui.Label(title_txt, cls=cls + ".title.label")
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62 gui.Dialog.__init__(self, title, body)
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63
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64 def get_fullpath(self):
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65 """Return the fullpath of the select save game file or None."""
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66 if self.value is None:
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67 return None
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68 return os.path.join(self.save_folder, self.value + ".xml")
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69
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70 def _populate_save_games(self):
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71 """Read list of save games."""
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72 for filename in os.listdir(self.save_folder):
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73 fullpath = os.path.join(self.save_folder, filename)
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74 root, ext = os.path.splitext(filename)
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75 if not os.path.isfile(fullpath):
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76 continue
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77 if ext != ".xml":
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78 continue
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79 self.save_games[root] = None
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80
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81 def _save_list_change(self):
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82 if self.name_input:
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83 self.name_input.value = self.save_list.value
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84
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85 def _click_ok(self):
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86 if self.name_input:
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87 self.value = self.name_input.value
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88 else:
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89 self.value = self.save_list.value
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90 if self.value:
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91 self.send(gui.CHANGE)
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92 self.close()
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93
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94 def _click_cancel(self):
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95 self.value = None
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96 self.send(gui.CHANGE)
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97 self.close()
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98
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99
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100 class SaveDialog(BaseSaveRestoreDialog):
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101 """Save game dialog."""
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102
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103 def __init__(self, gameboard):
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104 BaseSaveRestoreDialog.__init__(self, "Save Game ...", "Save", allow_new=True)
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105 self.connect(gui.CHANGE, self._save, gameboard)
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106
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107 def _save(self, gameboard):
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108 filename = self.get_fullpath()
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109 if filename is None:
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110 return
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111 data = gameboard.save_game()
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112 params = (version.SAVE_GAME_VERSION, data)
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113 xml = xmlrpclib.dumps(params, "foxassault")
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114 try:
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115 open(filename, "wb").write(xml)
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116 except Exception, e:
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117 print "Failed to save game: %s" % (e,)
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118
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119
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120 class RestoreDialog(BaseSaveRestoreDialog):
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121 """Restore game dialog."""
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122
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123 def __init__(self, gameboard):
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124 BaseSaveRestoreDialog.__init__(self, "Load Game ...", "Load", allow_new=False)
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125 self.connect(gui.CHANGE, self._restore, gameboard)
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126
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127 def _restore(self, gameboard):
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128 filename = self.get_fullpath()
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129 if filename is None:
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130 return
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131 try:
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132 xml = open(filename, "rb").read()
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133 params, methodname = xmlrpclib.loads(xml)
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134 if methodname != "foxassault":
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135 raise ValueError("File does not appear to be a "
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136 "Fox Assault save game.")
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137 save_version = params[0]
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138 if save_version != version.SAVE_GAME_VERSION:
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139 raise ValueError("Incompatible save game version.")
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140 data = params[1]
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141 except Exception, e:
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142 "Failed to load game: %s" % (e,)
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143 return
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144
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145 gameboard.restore_game(data)