def save(self, filename):
"""Save the current UML model to the specified file name.
Before writing the model file, this will verify that there are
no orphan references. It will also verify that the filename has
the correct extension. A status window is displayed while the
GIdleThread is executed. This thread actually saves the model.
"""
if not (filename and len(filename)):
return
self.verify_orphans()
main_window = self.main_window
queue = Queue()
status_window = StatusWindow(
gettext("Saving..."),
gettext("Saving model to {filename}").format(filename=filename),
parent=main_window.window,
queue=queue,
)
try:
with open(filename.encode("utf-8"), "w") as out:
saver = storage.save_generator(XMLWriter(out), self.element_factory)
worker = GIdleThread(saver, queue)
worker.start()
worker.wait()
if worker.error:
worker.reraise()
self.filename = filename
self.event_manager.handle(FileSaved(self, filename))
except Exception as e:
error_handler(
message=gettext("Unable to save model “{filename}”.").format(
filename=filename
),
secondary_message=error_message(e),
window=self.main_window.window,
)
raise
finally:
status_window.destroy()
def load(self, filename):
"""Load the Gaphor model from the supplied file name.
A status window displays the loading progress. The load
generator updates the progress queue. The loader is passed to a
GIdleThread which executes the load generator. If loading is
successful, the filename is set.
"""
queue = Queue()
status_window = StatusWindow(
gettext("Loading..."),
gettext("Loading model from {filename}").format(filename=filename),
parent=self.main_window.window,
queue=queue,
)
try:
loader = storage.load_generator(
filename.encode("utf-8"), self.element_factory, self.modeling_language
)
worker = GIdleThread(loader, queue)
worker.start()
worker.wait()
if worker.error:
worker.reraise()
self.filename = filename
self.event_manager.handle(FileLoaded(self, filename))
except Exception:
error_handler(
message=gettext("Unable to open model “{filename}”.").format(
filename=filename
),
secondary_message=gettext(
"This file does not contain a valid Gaphor model."
),
window=self.main_window.window,
)
raise
finally:
status_window.destroy()