get components from GUI; 3.0: i18n headers are decoded

fieldvalues = [entry.get() for entry in self.hdrFields]
From, To, Cc, Subj = fieldvalues[:4]
extraHdrs = [('Cc', Cc), ('X-Mailer', appname + ' (Python)')]
extraHdrs += list(zip(self.userHdrs, fieldvalues[4:]))
bodytext = self.editor.getAllText()

split multiple recipient lists on ',', fix empty fields

Tos = self.splitAddresses(To)
for (ix, (name, value)) in enumerate(extraHdrs):
if value: # ignored if ''
if value == '?': #? not replaced
extraHdrs[ix] = (name, '')
elif name.lower() in ['cc', 'bcc']: # split on ','
extraHdrs[ix] = (name, self.splitAddresses(value))

withdraw to disallow send during send

caveat: might not be foolproof - user may deiconify if icon visible

self.withdraw()
self.getPassword() # if needed; don't run pop up in send thread!
popup = popuputil.BusyBoxNowait(appname, 'Sending message')
sendingBusy.incr()
threadtools.startThread(
action = self.sendMessage,
args = (From, Tos, Subj, extraHdrs, bodytext, self.attaches,
saveMailSeparator,
bodytextEncoding,
attachesEncodings),
context = (popup,),
onExit = self.onSendExit,
onFail = self.onSendFail)

def onSendExit(self, popup):
"""
erase wait window, erase view window, decr send count;
sendMessage call auto saves sent message in local file;
can't use window.addSavedMails: mail text unavailable;
"""
popup.quit()
self.destroy()
sendingBusy.decr()

poss \ when opened, / in mailconfig

sentname = os.path.abspath(mailconfig.sentmailfile) # also expands '.'
if sentname in openSaveFiles.keys(): # sent file open?
window = openSaveFiles[sentname] # update list,raise
window.loadMailFileThread()

def onSendFail(self, exc_info, popup):

pop-up error, keep msg window to save or retry, redraw actions frame

popup.quit()
self.deiconify()
self.lift()
showerror(appname, 'Send failed: \n%s\n%s' % exc_info[:2])
printStack(exc_info)

1094 | Chapter 14: The PyMailGUI Client