Mercurial > rinkhals

annotate gamelib/savegame.py @ 547:1456bf2ff02e

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Allow cancelling of save game dialog with ESC.
author Simon Cross <hodgestar@gmail.com>
date Sat, 28 Nov 2009 11:12:45 +0000
parents 882b582da618
children a8dde729000a
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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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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
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19 TIMESTAMP_FORMAT = "%Y-%m-%dT%H:%M:%S"
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20
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21 def read_savegame(fullpath):
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22 """Open a save game file."""
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23 xml = zlib.decompress(open(fullpath, "rb").read())
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24 params, methodname = xmlrpclib.loads(xml)
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25 if methodname != "foxassault":
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26 raise SaveGameError("File does not appear to be a "
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27 "Fox Assault save game.")
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28 save_version = params[0]
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29 if save_version != version.SAVE_GAME_VERSION:
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30 raise SaveGameError("Incompatible save game version.")
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31
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32 data = params[1]
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33
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34 try:
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35 snapshot = decode_snapshot(params[2])
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36 except Exception, e:
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37 snapshot = None
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38
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39 try:
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40 level_name = params[3]
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41 except Exception, e:
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42 level_name = None
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43
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44 try:
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45 timestamp = datetime.datetime.strptime(params[4], TIMESTAMP_FORMAT)
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46 except Exception, e:
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47 timestamp = None
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48
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49 return data, snapshot, level_name, timestamp
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50
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51 def write_savegame(fullpath, data, snapshot, level_name, timestamp):
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52 """Write a save game file."""
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53 snapshot_data = encode_snapshot(snapshot)
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54 timestamp_str = timestamp.strftime(TIMESTAMP_FORMAT)
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55 params = (version.SAVE_GAME_VERSION, data, snapshot_data, level_name, timestamp_str)
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56 xml = xmlrpclib.dumps(params, "foxassault")
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57 open(fullpath, "wb").write(zlib.compress(xml))
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58
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59 def encode_snapshot(snapshot):
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60 """Encode a snapshot."""
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61 snapshot_file = StringIO.StringIO()
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62 pygame.image.save(snapshot, snapshot_file)
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63 data = snapshot_file.getvalue()
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64 data = base64.standard_b64encode(data)
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65 return data
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66
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67 def decode_snapshot(data):
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68 """Decode a snapshot."""
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69 data = base64.standard_b64decode(data)
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70 snapshot_file = StringIO.StringIO(data)
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71 snapshot = pygame.image.load(snapshot_file, "snapshot.tga")
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72 return snapshot
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74
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75 class SaveGameError(Exception):
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76 pass
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77
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79 class BaseSaveRestoreDialog(gui.Dialog):
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80 """Save game dialog."""
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81
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82 TIMESTAMP_DISPLAY = "%H:%M, %d %b %Y"
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83
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84 def __init__(self, title_txt, button_txt, allow_new, cls="dialog"):
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85 self.value = None
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86 self.save_folder = config.config.save_folder
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87
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88 self.save_games = {}
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89 self._populate_save_games()
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91 if allow_new:
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92 self.name_input = gui.Input()
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93 else:
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94 self.name_input = None
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96 td_style = {
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97 'padding_left': 4,
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98 'padding_right': 4,
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99 'padding_top': 2,
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100 'padding_bottom': 2,
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101 }
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102
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103 self.save_list = gui.List(width=350, height=250)
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104 games = self.save_games.keys()
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105 games.sort()
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106 for name in games:
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107 self.save_list.add(name, value=name)
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108 self.save_list.set_vertical_scroll(0)
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109 self.save_list.connect(gui.CHANGE, self._save_list_change)
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110
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111 self.image_container = gui.Container()
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112
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113 button_ok = gui.Button(button_txt)
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114 button_ok.connect(gui.CLICK, self._click_ok)
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115
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116 button_cancel = gui.Button("Cancel")
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117 button_cancel.connect(gui.CLICK, self._click_cancel)
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118
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119 body = gui.Table()
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120 body.tr()
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121 body.td(self.save_list, style=td_style, colspan=2)
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122 body.td(self.image_container, style=td_style, colspan=2)
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123 body.tr()
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124 if self.name_input:
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125 body.td(gui.Label("Save as:"), style=td_style, align=1)
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126 body.td(self.name_input, style=td_style)
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127 else:
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diff changeset
128 body.td(gui.Spacer(0, 0), style=td_style, colspan=2)
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diff changeset
129 body.td(button_ok, style=td_style, align=1)
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diff changeset
130 body.td(button_cancel, style=td_style, align=1)
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131
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132 title = gui.Label(title_txt, cls=cls + ".title.label")
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diff changeset
133 gui.Dialog.__init__(self, title, body)
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134
510
3e4bb2c9556c Lazy loading of save game snapshots.
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parents: 509
diff changeset
135 if games:
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parents: 509
diff changeset
136 self.save_list.group.value = games[0]
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diff changeset
137
486
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diff changeset
138 def get_fullpath(self):
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139 """Return the fullpath of the select save game file or None."""
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140 if self.value is None:
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141 return None
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142 return os.path.join(self.save_folder, self.value + ".xml")
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143
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144 def _populate_save_games(self):
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145 """Read list of save games."""
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146 for filename in os.listdir(self.save_folder):
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147 fullpath = os.path.join(self.save_folder, filename)
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148 root, ext = os.path.splitext(filename)
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149 if not os.path.isfile(fullpath):
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150 continue
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151 if ext != ".xml":
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152 continue
510
3e4bb2c9556c Lazy loading of save game snapshots.
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diff changeset
153 self.save_games[root] = (fullpath, None)
491
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diff changeset
154
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diff changeset
155 def _create_image_widget(self, fullpath):
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diff changeset
156 """Create an image showing the contents of a save game file."""
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diff changeset
157 try:
509
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
158 data, screenshot, level_name, timestamp = read_savegame(fullpath)
540
882b582da618 Remove down wrapping of exceptions.
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parents: 512
diff changeset
159 except Exception:
491
75ef6ea3b7a6 Start of support for save game snapshots.
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diff changeset
160 return gui.Label("Bad Save Game")
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diff changeset
161
509
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
162 tbl = gui.Table()
77a3f7f1c856 Add level name and timestamp to save games.
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163
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
164 tbl.tr()
491
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diff changeset
165 if screenshot is None:
509
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
166 tbl.td(gui.Label("No screenshot"))
77a3f7f1c856 Add level name and timestamp to save games.
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parents: 499
diff changeset
167 else:
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
168 tbl.td(gui.Image(screenshot))
491
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diff changeset
169
509
77a3f7f1c856 Add level name and timestamp to save games.
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170 tbl.tr()
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diff changeset
171 if level_name is None:
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diff changeset
172 tbl.td(gui.Label("Level: ???"))
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parents: 499
diff changeset
173 else:
77a3f7f1c856 Add level name and timestamp to save games.
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parents: 499
diff changeset
174 tbl.td(gui.Label("Level: %s" % (level_name,)))
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
175
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
176 if timestamp is not None:
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diff changeset
177 tbl.tr()
77a3f7f1c856 Add level name and timestamp to save games.
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diff changeset
178 tbl.td(gui.Label(timestamp.strftime(self.TIMESTAMP_DISPLAY)))
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diff changeset
179
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parents: 499
diff changeset
180 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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181
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182 def _save_list_change(self):
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183 if self.name_input:
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184 self.name_input.value = self.save_list.value
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diff changeset
185
491
75ef6ea3b7a6 Start of support for save game snapshots.
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parents: 486
diff changeset
186 for w in self.image_container.widgets:
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diff changeset
187 self.image_container.remove(w)
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diff changeset
188
510
3e4bb2c9556c Lazy loading of save game snapshots.
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parents: 509
diff changeset
189 name = self.save_list.value
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parents: 509
diff changeset
190 fullpath, widget = self.save_games[name]
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parents: 509
diff changeset
191 if widget is None:
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parents: 509
diff changeset
192 widget = self._create_image_widget(fullpath)
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parents: 509
diff changeset
193 self.save_games[name] = (fullpath, widget)
3e4bb2c9556c Lazy loading of save game snapshots.
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parents: 509
diff changeset
194
3e4bb2c9556c Lazy loading of save game snapshots.
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diff changeset
195 self.image_container.add(widget, 0, 0)
491
75ef6ea3b7a6 Start of support for save game snapshots.
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diff changeset
196
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
197 def _click_ok(self):
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diff changeset
198 if self.name_input:
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diff changeset
199 self.value = self.name_input.value
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diff changeset
200 else:
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diff changeset
201 self.value = self.save_list.value
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parents:
diff changeset
202 if self.value:
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diff changeset
203 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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diff changeset
204 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
205
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 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.
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parents:
diff changeset
207 self.value = None
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diff changeset
208 self.send(gui.CHANGE)
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diff changeset
209 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
210
547
1456bf2ff02e Allow cancelling of save game dialog with ESC.
Simon Cross <hodgestar@gmail.com>
parents: 540
diff changeset
211 def event(self, e):
1456bf2ff02e Allow cancelling of save game dialog with ESC.
Simon Cross <hodgestar@gmail.com>
parents: 540
diff changeset
212 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
213 self._click_cancel()
1456bf2ff02e Allow cancelling of save game dialog with ESC.
Simon Cross <hodgestar@gmail.com>
parents: 540
diff changeset
214 return True
1456bf2ff02e Allow cancelling of save game dialog with ESC.
Simon Cross <hodgestar@gmail.com>
parents: 540
diff changeset
215 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
216
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 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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diff changeset
218 """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
219
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
220 def __init__(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
221 BaseSaveRestoreDialog.__init__(self, "Save Game ...", "Save", allow_new=True)
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
222 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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diff changeset
223
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
224 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
225 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.
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parents:
diff changeset
226 if filename is None:
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
227 return
496
bf90a2948e34 Basic snapshot support in save games added.
Simon Cross <hodgestar@gmail.com>
parents: 491
diff changeset
228
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
229 data = gameboard.save_game()
496
bf90a2948e34 Basic snapshot support in save games added.
Simon Cross <hodgestar@gmail.com>
parents: 491
diff changeset
230 snapshot = gameboard.snapshot()
509
77a3f7f1c856 Add level name and timestamp to save games.
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parents: 499
diff changeset
231 level_name = gameboard.level.level_name
77a3f7f1c856 Add level name and timestamp to save games.
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parents: 499
diff changeset
232 timestamp = datetime.datetime.now()
496
bf90a2948e34 Basic snapshot support in save games added.
Simon Cross <hodgestar@gmail.com>
parents: 491
diff changeset
233
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
234 try:
509
77a3f7f1c856 Add level name and timestamp to save games.
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parents: 499
diff changeset
235 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.
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parents:
diff changeset
236 except Exception, e:
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
237 print "Failed to save game: %s" % (e,)
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
238
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
239
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
240 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
241 """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.
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diff changeset
242
512
b112bcf4d435 Add restore game button to main menu.
Simon Cross <hodgestar@gmail.com>
parents: 510
diff changeset
243 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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parents:
diff changeset
244 BaseSaveRestoreDialog.__init__(self, "Load Game ...", "Load", allow_new=False)
512
b112bcf4d435 Add restore game button to main menu.
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parents: 510
diff changeset
245 self.connect(gui.CHANGE, self._restore, 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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parents:
diff changeset
246
512
b112bcf4d435 Add restore game button to main menu.
Simon Cross <hodgestar@gmail.com>
parents: 510
diff changeset
247 def _restore(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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parents:
diff changeset
248 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.
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parents:
diff changeset
249 if filename is None:
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 return
491
75ef6ea3b7a6 Start of support for save game snapshots.
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parents: 486
diff changeset
251
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
252 try:
509
77a3f7f1c856 Add level name and timestamp to save games.
Simon Cross <hodgestar@gmail.com>
parents: 499
diff changeset
253 data, screenshot, level_name, timestamp = read_savegame(filename)
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
254 except Exception, e:
491
75ef6ea3b7a6 Start of support for save game snapshots.
Simon Cross <hodgestar@gmail.com>
parents: 486
diff changeset
255 print "Failed to load game: %s" % (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.
Simon Cross <hodgestar@gmail.com>
parents:
diff changeset
256 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.
Simon Cross <hodgestar@gmail.com>
parents:
diff changeset
257
512
b112bcf4d435 Add restore game button to main menu.
Simon Cross <hodgestar@gmail.com>
parents: 510
diff changeset
258 if 'refid' not in data or 'class' not in data or data['class'] != gameboard.GameBoard.__name__:
b112bcf4d435 Add restore game button to main menu.
Simon Cross <hodgestar@gmail.com>
parents: 510
diff changeset
259 print "Failed to load game: Invalid game data."
b112bcf4d435 Add restore game button to main menu.
Simon Cross <hodgestar@gmail.com>
parents: 510
diff changeset
260 return
b112bcf4d435 Add restore game button to main menu.
Simon Cross <hodgestar@gmail.com>
parents: 510
diff changeset
261
b112bcf4d435 Add restore game button to main menu.
Simon Cross <hodgestar@gmail.com>
parents: 510
diff changeset
262 try:
b112bcf4d435 Add restore game button to main menu.
Simon Cross <hodgestar@gmail.com>
parents: 510
diff changeset
263 new_gameboard = serializer.unsimplify(data)
b112bcf4d435 Add restore game button to main menu.
Simon Cross <hodgestar@gmail.com>
parents: 510
diff changeset
264 except Exception, e:
b112bcf4d435 Add restore game button to main menu.
Simon Cross <hodgestar@gmail.com>
parents: 510
diff changeset
265 print "Failed to load game: %s" % (e,)
b112bcf4d435 Add restore game button to main menu.
Simon Cross <hodgestar@gmail.com>
parents: 510
diff changeset
266 return
b112bcf4d435 Add restore game button to main menu.
Simon Cross <hodgestar@gmail.com>
parents: 510
diff changeset
267
b112bcf4d435 Add restore game button to main menu.
Simon Cross <hodgestar@gmail.com>
parents: 510
diff changeset
268 restore_func(new_gameboard)