def actionButtons(self):
return [('Cancel', self.quit), # need method to use self
('Parts', self.onParts), # PopupWindow verifies cancel
('Attach', self.onAttach),
('Send', self.onSend)] # 4E: don't pad: centered

def onParts(self):

caveat: deletes not currently supported

if not self.attaches:
showinfo(appname, 'Nothing attached')
else:
msg = '\n'.join(['Already attached:\n'] + self.attaches)
showinfo(appname, msg)

def onAttach(self):
"""
attach a file to the mail: name added here will be
added as a part on Send, inside the mailtools pkg;
4E: could ask Unicode type here instead of on send
"""
if not self.openDialog:
self.openDialog = Open(title=appname + ': Select Attachment File')
filename = self.openDialog.show() # remember prior dir
if filename:
self.attaches.append(filename) # to be opened in send method

def resolveUnicodeEncodings(self):
"""
3.0/4E: to prepare for send, resolve Unicode encoding for text parts:
both main text part, and any text part attachments; the main text part
may have had a known encoding if this is a reply or forward, but not for
a write, and it may require a different encoding after editing anyhow;
smtplib in 3.1 requires that full message text be encodable per ASCII
when sent (if it's a str), so it's crucial to get this right here; else
fails if reply/fwd to UTF8 text when config=ascii if any non-ascii chars;
try user setting and reply but fall back on general UTF8 as a last resort;
"""

def isTextKind(filename):
contype, encoding = mimetypes.guess_type(filename)
if contype is None or encoding is not None: # 4E utility
return False # no guess, compressed?
maintype, subtype = contype.split('/', 1) # check for text/?
return maintype == 'text'

resolve many body text encoding

bodytextEncoding = mailconfig.mainTextEncoding
if bodytextEncoding == None:
asknow = askstring('PyMailGUI', 'Enter main text Unicode encoding name')
bodytextEncoding = asknow or 'latin-1' # or sys.getdefaultencoding()?

last chance: use utf-8 if can't encode per prior selections

if bodytextEncoding != 'utf-8':
try:

1092 | Chapter 14: The PyMailGUI Client