contSave not threaded: disables all other actions;
"""
msgnums = self.selectedMsgs()
if not msgnums:
showerror(appname, 'No message selected')
else:

caveat: dialog warns about replacing file

filename = self.saveDialog.show() # shared class attr
if filename: # don't verify num msgs
filename = os.path.abspath(filename) # normalize / to \
self.getMessages(msgnums,
after=lambda: self.contSave(msgnums, filename))

def contSave(self, msgnums, filename):

test busy now, after poss srvr msgs load

if (filename in openSaveFiles.keys() and # viewing this file?
openSaveFiles[filename].openFileBusy): # load/del occurring?
showerror(appname, 'Target file busy - cannot save')
else:
try: # caveat:not threaded
fulltextlist = [] # 3.0: use encoding
mailfile = open(filename, 'a', encoding=mailconfig.fetchEncoding)
for msgnum in msgnums: # < 1sec for N megs
fulltext = self.getMessage(msgnum) # but poss many msgs
if fulltext[-1] != '\n': fulltext += '\n'
mailfile.write(saveMailSeparator)
mailfile.write(fulltext)
fulltextlist.append(fulltext)
mailfile.close()
except:
showerror(appname, 'Error during save')
printStack(sys.exc_info())
else: # why .keys(): EIBTI
if filename in openSaveFiles.keys(): # viewing this file?
window = openSaveFiles[filename] # update list, raise
window.addSavedMails(fulltextlist) # avoid file reload
#window.loadMailFileThread() # this was very slow

def onOpenMailFile(self, filename=None):

process saved mail offline

filename = filename or self.openDialog.show() # shared class attr
if filename:
filename = os.path.abspath(filename) # match on full name
if filename in openSaveFiles.keys(): # only 1 win per file
openSaveFiles[filename].lift() # raise file's window
showinfo(appname, 'File already open') # else deletes odd
else:
from PyMailGui import PyMailFileWindow # avoid duplicate win
popup = PyMailFileWindow(filename) # new list window
openSaveFiles[filename] = popup # removed in quit
popup.loadMailFileThread() # try load in thread

def onDeleteMail(self):

delete selected mails from server or file

msgnums = self.selectedMsgs() # subclass: fillIndex

1074 | Chapter 14: The PyMailGUI Client