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annotate gamelib/savegame.py @ 602:1b77bcbfb9e3 default tip

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author convert-repo
date Thu, 19 May 2011 15:58:03 +0000
parents 95c71a13468c
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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 import StringIO
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6 import base64
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7 import zlib
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8 import datetime
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9
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10 from pgu import gui
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11 import pygame
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12 from pygame.locals import KEYDOWN, K_ESCAPE
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14 import config
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15 import version
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16 import gameboard
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17 import serializer
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18 import misc
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19
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20 TIMESTAMP_FORMAT = "%Y-%m-%dT%H:%M:%S"
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21
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22 def read_savegame(fullpath):
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23 """Open a save game file."""
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24 xml = zlib.decompress(open(fullpath, "rb").read())
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25 params, methodname = xmlrpclib.loads(xml)
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26 if methodname != "foxassault":
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27 raise SaveGameError("File does not appear to be a "
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28 "Fox Assault save game.")
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29 save_version = params[0]
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30 if save_version != version.SAVE_GAME_VERSION:
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31 raise SaveGameError("Incompatible save game version.")
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32
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33 data = params[1]
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34
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35 try:
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36 snapshot = decode_snapshot(params[2])
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37 except Exception, e:
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38 snapshot = None
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39
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40 try:
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41 level_name = params[3]
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42 except Exception, e:
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43 level_name = None
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44
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45 try:
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46 timestamp = datetime.datetime.strptime(params[4], TIMESTAMP_FORMAT)
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47 except Exception, e:
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48 timestamp = None
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49
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50 return data, snapshot, level_name, timestamp
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51
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52 def write_savegame(fullpath, data, snapshot, level_name, timestamp):
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53 """Write a save game file."""
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54 snapshot_data = encode_snapshot(snapshot)
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55 timestamp_str = timestamp.strftime(TIMESTAMP_FORMAT)
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56 params = (version.SAVE_GAME_VERSION, data, snapshot_data, level_name, timestamp_str)
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57 xml = xmlrpclib.dumps(params, "foxassault")
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58 open(fullpath, "wb").write(zlib.compress(xml))
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59
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60 def encode_snapshot(snapshot):
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61 """Encode a snapshot."""
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62 snapshot_file = StringIO.StringIO()
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63 pygame.image.save(snapshot, snapshot_file)
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64 data = snapshot_file.getvalue()
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65 data = base64.standard_b64encode(data)
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66 return data
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67
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68 def decode_snapshot(data):
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69 """Decode a snapshot."""
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70 data = base64.standard_b64decode(data)
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71 snapshot_file = StringIO.StringIO(data)
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72 snapshot = pygame.image.load(snapshot_file, "snapshot.tga")
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73 return snapshot
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75
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76 class SaveGameError(Exception):
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77 pass
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78
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80 class BaseSaveRestoreDialog(gui.Dialog):
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81 """Save game dialog."""
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82
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83 TIMESTAMP_DISPLAY = "%H:%M, %d %b %Y"
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84
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85 def __init__(self, title_txt, button_txt, allow_new, cls="dialog"):
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86 self.value = None
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87 self.save_folder = config.config.save_folder
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89 self.save_games = {}
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90 self._populate_save_games()
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92 if allow_new:
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93 self.name_input = gui.Input()
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94 else:
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95 self.name_input = None
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96
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97 td_style = {
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98 'padding_left': 4,
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99 'padding_right': 4,
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100 'padding_top': 2,
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101 'padding_bottom': 2,
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102 }
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103
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104 self.save_list = gui.List(width=350, height=250)
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105 games = self.save_games.keys()
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106 games.sort()
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107 for name in games:
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108 self.save_list.add(name, value=name)
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109 self.save_list.set_vertical_scroll(0)
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110 self.save_list.connect(gui.CHANGE, self._save_list_change)
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111
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112 self.image_container = gui.Container()
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113
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114 button_ok = gui.Button(button_txt)
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115 button_ok.connect(gui.CLICK, self._click_ok)
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116
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117 button_cancel = gui.Button("Cancel")
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118 button_cancel.connect(gui.CLICK, self._click_cancel)
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119
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120 body = gui.Table()
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121 body.tr()
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122 body.td(self.save_list, style=td_style, colspan=2)
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123 body.td(self.image_container, style=td_style, colspan=2)
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124 body.tr()
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125 if self.name_input:
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126 body.td(gui.Label("Save as:"), style=td_style, align=1)
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127 body.td(self.name_input, style=td_style)
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128 else:
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129 body.td(gui.Spacer(0, 0), style=td_style, colspan=2)
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130 body.td(button_ok, style=td_style, align=1)
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131 body.td(button_cancel, style=td_style, align=1)
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132
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133 title = gui.Label(title_txt, cls=cls + ".title.label")
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diff changeset
134 gui.Dialog.__init__(self, title, body)
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135
510
3e4bb2c9556c Lazy loading of save game snapshots.
Simon Cross <hodgestar@gmail.com>
parents: 509
diff changeset
136 if games:
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parents: 509
diff changeset
137 self.save_list.group.value = games[0]
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diff changeset
138
486
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139 def get_fullpath(self):
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140 """Return the fullpath of the select save game file or None."""
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141 if self.value is None:
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142 return None
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143 return os.path.join(self.save_folder, self.value + ".xml")
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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144
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145 def _populate_save_games(self):
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146 """Read list of save games."""
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147 for filename in os.listdir(self.save_folder):
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148 fullpath = os.path.join(self.save_folder, filename)
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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149 root, ext = os.path.splitext(filename)
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150 if not os.path.isfile(fullpath):
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151 continue
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152 if ext != ".xml":
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153 continue
510
3e4bb2c9556c Lazy loading of save game snapshots.
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diff changeset
154 self.save_games[root] = (fullpath, None)
491
75ef6ea3b7a6 Start of support for save game snapshots.
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diff changeset
155
75ef6ea3b7a6 Start of support for save game snapshots.
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diff changeset
156 def _create_image_widget(self, fullpath):
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diff changeset
157 """Create an image showing the contents of a save game file."""
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diff changeset
158 try:
509
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
159 data, screenshot, level_name, timestamp = read_savegame(fullpath)
540
882b582da618 Remove down wrapping of exceptions.
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parents: 512
diff changeset
160 except Exception:
491
75ef6ea3b7a6 Start of support for save game snapshots.
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diff changeset
161 return gui.Label("Bad Save Game")
75ef6ea3b7a6 Start of support for save game snapshots.
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162
509
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
163 tbl = gui.Table()
77a3f7f1c856 Add level name and timestamp to save games.
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164
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diff changeset
165 tbl.tr()
491
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diff changeset
166 if screenshot is None:
509
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
167 tbl.td(gui.Label("No screenshot"))
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diff changeset
168 else:
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diff changeset
169 tbl.td(gui.Image(screenshot))
491
75ef6ea3b7a6 Start of support for save game snapshots.
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diff changeset
170
509
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
171 tbl.tr()
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diff changeset
172 if level_name is None:
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diff changeset
173 tbl.td(gui.Label("Level: ???"))
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
174 else:
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
175 tbl.td(gui.Label("Level: %s" % (level_name,)))
77a3f7f1c856 Add level name and timestamp to save games.
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parents: 499
diff changeset
176
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
177 if timestamp is not None:
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diff changeset
178 tbl.tr()
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
179 tbl.td(gui.Label(timestamp.strftime(self.TIMESTAMP_DISPLAY)))
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diff changeset
180
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
181 return tbl
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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182
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183 def _save_list_change(self):
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184 if self.name_input:
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185 self.name_input.value = self.save_list.value
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diff changeset
186
491
75ef6ea3b7a6 Start of support for save game snapshots.
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parents: 486
diff changeset
187 for w in self.image_container.widgets:
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diff changeset
188 self.image_container.remove(w)
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diff changeset
189
510
3e4bb2c9556c Lazy loading of save game snapshots.
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diff changeset
190 name = self.save_list.value
3e4bb2c9556c Lazy loading of save game snapshots.
Simon Cross <hodgestar@gmail.com>
parents: 509
diff changeset
191 fullpath, widget = self.save_games[name]
3e4bb2c9556c Lazy loading of save game snapshots.
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parents: 509
diff changeset
192 if widget is None:
3e4bb2c9556c Lazy loading of save game snapshots.
Simon Cross <hodgestar@gmail.com>
parents: 509
diff changeset
193 widget = self._create_image_widget(fullpath)
3e4bb2c9556c Lazy loading of save game snapshots.
Simon Cross <hodgestar@gmail.com>
parents: 509
diff changeset
194 self.save_games[name] = (fullpath, widget)
3e4bb2c9556c Lazy loading of save game snapshots.
Simon Cross <hodgestar@gmail.com>
parents: 509
diff changeset
195
3e4bb2c9556c Lazy loading of save game snapshots.
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diff changeset
196 self.image_container.add(widget, 0, 0)
491
75ef6ea3b7a6 Start of support for save game snapshots.
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diff changeset
197
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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diff changeset
198 def _click_ok(self):
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diff changeset
199 if self.name_input:
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diff changeset
200 self.value = self.name_input.value
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parents:
diff changeset
201 else:
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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diff changeset
202 self.value = self.save_list.value
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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parents:
diff changeset
203 if self.value:
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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diff changeset
204 self.send(gui.CHANGE)
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.
Simon Cross <hodgestar@gmail.com>
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diff changeset
205 self.close()
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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parents:
diff changeset
206
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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parents:
diff changeset
207 def _click_cancel(self):
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.
Simon Cross <hodgestar@gmail.com>
parents:
diff changeset
208 self.value = None
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parents:
diff changeset
209 self.send(gui.CHANGE)
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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parents:
diff changeset
210 self.close()
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.
Simon Cross <hodgestar@gmail.com>
parents:
diff changeset
211
547
1456bf2ff02e Allow cancelling of save game dialog with ESC.
Simon Cross <hodgestar@gmail.com>
parents: 540
diff changeset
212 def event(self, e):
1456bf2ff02e Allow cancelling of save game dialog with ESC.
Simon Cross <hodgestar@gmail.com>
parents: 540
diff changeset
213 if e.type == KEYDOWN and e.key == K_ESCAPE:
1456bf2ff02e Allow cancelling of save game dialog with ESC.
Simon Cross <hodgestar@gmail.com>
parents: 540
diff changeset
214 self._click_cancel()
1456bf2ff02e Allow cancelling of save game dialog with ESC.
Simon Cross <hodgestar@gmail.com>
parents: 540
diff changeset
215 return True
1456bf2ff02e Allow cancelling of save game dialog with ESC.
Simon Cross <hodgestar@gmail.com>
parents: 540
diff changeset
216 return gui.Dialog.event(self, e)
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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parents:
diff changeset
217
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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parents:
diff changeset
218 class SaveDialog(BaseSaveRestoreDialog):
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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parents:
diff changeset
219 """Save game dialog."""
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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diff changeset
220
571
2921169e545b Don't rely on connect listener call order (PGU stores listeners in a dict).
Simon Cross <hodgestar@gmail.com>
parents: 566
diff changeset
221 def __init__(self, gameboard, saved_func=None):
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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parents:
diff changeset
222 BaseSaveRestoreDialog.__init__(self, "Save Game ...", "Save", allow_new=True)
571
2921169e545b Don't rely on connect listener call order (PGU stores listeners in a dict).
Simon Cross <hodgestar@gmail.com>
parents: 566
diff changeset
223 if saved_func is None:
2921169e545b Don't rely on connect listener call order (PGU stores listeners in a dict).
Simon Cross <hodgestar@gmail.com>
parents: 566
diff changeset
224 self._saved_func = lambda _val: None
2921169e545b Don't rely on connect listener call order (PGU stores listeners in a dict).
Simon Cross <hodgestar@gmail.com>
parents: 566
diff changeset
225 else:
2921169e545b Don't rely on connect listener call order (PGU stores listeners in a dict).
Simon Cross <hodgestar@gmail.com>
parents: 566
diff changeset
226 self._saved_func = saved_func
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.
Simon Cross <hodgestar@gmail.com>
parents:
diff changeset
227 self.connect(gui.CHANGE, self._save, gameboard)
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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parents:
diff changeset
228
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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parents:
diff changeset
229 def _save(self, gameboard):
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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parents:
diff changeset
230 filename = self.get_fullpath()
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.
Simon Cross <hodgestar@gmail.com>
parents:
diff changeset
231 if filename is None:
571
2921169e545b Don't rely on connect listener call order (PGU stores listeners in a dict).
Simon Cross <hodgestar@gmail.com>
parents: 566
diff changeset
232 self._saved_func(False)
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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parents:
diff changeset
233 return
496
bf90a2948e34 Basic snapshot support in save games added.
Simon Cross <hodgestar@gmail.com>
parents: 491
diff changeset
234
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.
Simon Cross <hodgestar@gmail.com>
parents:
diff changeset
235 data = gameboard.save_game()
496
bf90a2948e34 Basic snapshot support in save games added.
Simon Cross <hodgestar@gmail.com>
parents: 491
diff changeset
236 snapshot = gameboard.snapshot()
509
77a3f7f1c856 Add level name and timestamp to save games.
Simon Cross <hodgestar@gmail.com>
parents: 499
diff changeset
237 level_name = gameboard.level.level_name
77a3f7f1c856 Add level name and timestamp to save games.
Simon Cross <hodgestar@gmail.com>
parents: 499
diff changeset
238 timestamp = datetime.datetime.now()
496
bf90a2948e34 Basic snapshot support in save games added.
Simon Cross <hodgestar@gmail.com>
parents: 491
diff changeset
239
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.
Simon Cross <hodgestar@gmail.com>
parents:
diff changeset
240 try:
509
77a3f7f1c856 Add level name and timestamp to save games.
Simon Cross <hodgestar@gmail.com>
parents: 499
diff changeset
241 write_savegame(filename, data, snapshot, level_name, timestamp)
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.
Simon Cross <hodgestar@gmail.com>
parents:
diff changeset
242 except Exception, e:
571
2921169e545b Don't rely on connect listener call order (PGU stores listeners in a dict).
Simon Cross <hodgestar@gmail.com>
parents: 566
diff changeset
243 self._saved_func(False)
575
95c71a13468c Convert failed save/restore print messages to warning dialogs.
Simon Cross <hodgestar@gmail.com>
parents: 571
diff changeset
244 misc.WarnDialog("Save Failed", str(e)).open()
571
2921169e545b Don't rely on connect listener call order (PGU stores listeners in a dict).
Simon Cross <hodgestar@gmail.com>
parents: 566
diff changeset
245 return
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.
Simon Cross <hodgestar@gmail.com>
parents:
diff changeset
246
571
2921169e545b Don't rely on connect listener call order (PGU stores listeners in a dict).
Simon Cross <hodgestar@gmail.com>
parents: 566
diff changeset
247 self._saved_func(True)
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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parents:
diff changeset
248
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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parents:
diff changeset
249 class RestoreDialog(BaseSaveRestoreDialog):
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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parents:
diff changeset
250 """Restore game dialog."""
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.
Simon Cross <hodgestar@gmail.com>
parents:
diff changeset
251
512
b112bcf4d435 Add restore game button to main menu.
Simon Cross <hodgestar@gmail.com>
parents: 510
diff changeset
252 def __init__(self, restore_func):
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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253 BaseSaveRestoreDialog.__init__(self, "Load Game ...", "Load", allow_new=False)
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254 self.connect(gui.CHANGE, self._restore, restore_func)
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255
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256 def _restore(self, restore_func):
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257 filename = self.get_fullpath()
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258 if filename is None:
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259 return
491
75ef6ea3b7a6 Start of support for save game snapshots.
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260
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261 try:
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77a3f7f1c856 Add level name and timestamp to save games.
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262 data, screenshot, level_name, timestamp = read_savegame(filename)
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263 except Exception, e:
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264 misc.WarnDialog("Restore Failed", str(e)).open()
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265 return
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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266
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267 if 'refid' not in data or 'class' not in data or data['class'] != gameboard.GameBoard.__name__:
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268 misc.WarnDialog("Restore Failed", "Saved game board state invalid.").open()
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269 return
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270
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271 try:
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272 new_gameboard = serializer.unsimplify(data)
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273 except Exception, e:
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274 misc.WarnDialog("Restore Failed", str(e)).open()
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275 return
b112bcf4d435 Add restore game button to main menu.
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276
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277 restore_func(new_gameboard)