| 23 |
from map import Map |
from map import Map |
| 24 |
from data import ShapefileStore |
from data import ShapefileStore |
| 25 |
|
|
| 26 |
from transientdb import TransientDatabase |
from transientdb import TransientDatabase, AutoTransientTable |
| 27 |
|
|
| 28 |
class AutoRemoveFile: |
class AutoRemoveFile: |
| 29 |
|
|
| 129 |
self.filename = None |
self.filename = None |
| 130 |
self.maps = [] |
self.maps = [] |
| 131 |
self.tables = [] |
self.tables = [] |
| 132 |
|
self.shapestores = [] |
| 133 |
self.extensions = [] |
self.extensions = [] |
| 134 |
self.temp_dir = None |
self.temp_dir = None |
| 135 |
self.transient_db = None |
self.transient_db = None |
| 179 |
extension.Subscribe(channel, self.forward, channel) |
extension.Subscribe(channel, self.forward, channel) |
| 180 |
self.changed(EXTENSIONS_CHANGED) |
self.changed(EXTENSIONS_CHANGED) |
| 181 |
|
|
| 182 |
|
def ShapeStores(self): |
| 183 |
|
"""Return a list of all ShapeStore objects open in the session""" |
| 184 |
|
return [store() for store in self.shapestores] |
| 185 |
|
|
| 186 |
|
def _add_shapestore(self, store): |
| 187 |
|
"""Internal: Add the shapestore to the list of shapestores""" |
| 188 |
|
self.shapestores.append(weakref.ref(store, |
| 189 |
|
self._clean_weak_store_refs)) |
| 190 |
|
|
| 191 |
|
def _clean_weak_store_refs(self, weakref): |
| 192 |
|
"""Internal: Remove the weakref from the shapestores list""" |
| 193 |
|
self.shapestores = [store for store in self.shapestores |
| 194 |
|
if store is not weakref] |
| 195 |
|
|
| 196 |
|
def Tables(self): |
| 197 |
|
"""Return a list of all table objects open in the session |
| 198 |
|
|
| 199 |
|
The list includes all tables that are indirectly opened through |
| 200 |
|
shape stores and the tables that have been opened explicitly. |
| 201 |
|
""" |
| 202 |
|
return self.tables + [store.Table() for store in self.ShapeStores()] |
| 203 |
|
|
| 204 |
|
def AddTable(self, table): |
| 205 |
|
"""Add the table to the session |
| 206 |
|
|
| 207 |
|
All tables associated with the session that are not implicitly |
| 208 |
|
created by the OpenShapefile method (and maybe other Open* |
| 209 |
|
methods in the future) have to be passed to this method to make |
| 210 |
|
sure the session knows about it. The session keeps a reference |
| 211 |
|
to the table. Only tables managed by the session in this way |
| 212 |
|
should be used for layers contained in one of the session's |
| 213 |
|
maps. |
| 214 |
|
|
| 215 |
|
The table parameter may be any object implementing the table |
| 216 |
|
interface. If it's not already one of the transient tables |
| 217 |
|
instantiate an AutoTransientTable with it and use that instead |
| 218 |
|
of the original table (note that the AutoTransientTable keeps a |
| 219 |
|
reference to the original table). |
| 220 |
|
|
| 221 |
|
Return the table object actually used by the session. |
| 222 |
|
""" |
| 223 |
|
if not hasattr(table, "transient_table"): |
| 224 |
|
transient_table = AutoTransientTable(self.TransientDB(), table) |
| 225 |
|
else: |
| 226 |
|
transient_table = table |
| 227 |
|
self.tables.append(transient_table) |
| 228 |
|
return transient_table |
| 229 |
|
|
| 230 |
def temp_directory(self): |
def temp_directory(self): |
| 231 |
""" |
""" |
| 232 |
Return the name of the directory for session specific temporary files |
Return the name of the directory for session specific temporary files |
| 242 |
|
|
| 243 |
def OpenShapefile(self, filename): |
def OpenShapefile(self, filename): |
| 244 |
"""Return a shapefile store object for the data in the given file""" |
"""Return a shapefile store object for the data in the given file""" |
| 245 |
return ShapefileStore(self, filename) |
store = ShapefileStore(self, filename) |
| 246 |
|
self._add_shapestore(store) |
| 247 |
|
return store |
| 248 |
|
|
| 249 |
def TransientDB(self): |
def TransientDB(self): |
| 250 |
if self.transient_db is None: |
if self.transient_db is None: |
Parent Directory
| 
Revision Log
| 
Patch