myactions = self.actionButtons()
for (label, callback) in myactions:
b = Button(actionsframe, text=label, command=callback)
b.config(bg='beige', relief=RIDGE, bd=2)
b.pack(side=TOP, expand=YES, fill=BOTH)

body text, pack last=clip first

self.editor.pack(side=BOTTOM) # may be multiple editors
self.update() # 3.0: else may be @ line2
self.editor.setAllText(showtext) # each has own content
lines = len(showtext.splitlines())
lines = min(lines + 3, mailconfig.viewheight or 20)
self.editor.setHeight(lines) # else height=24, width=80
self.editor.setWidth(80) # or from PyEdit textConfig
if mailconfig.viewbg:
self.editor.setBg(mailconfig.viewbg) # colors, font in mailconfig
if mailconfig.viewfg:
self.editor.setFg(mailconfig.viewfg)
if mailconfig.viewfont: # also via editor Tools menu
self.editor.setFont(mailconfig.viewfont)

def makeHeaders(self, headermap):
"""
add header entry fields, return action buttons frame;
3.0: uses grid for platform-neutral layout of label/entry rows;
packed row frames with fixed-width labels would work well too;

3.0: decoding of i18n headers (and email names in address headers)
is performed here if still required as they are added to the GUI;
some may have been decoded already for reply/forward windows that
need to use decoded text, but the extra decode here is harmless for
these, and is required for other headers and cases such as fetched
mail views; always, headers are in decoded form when displayed in
the GUI, and will be encoded within mailtools on Sends if they are
non-ASCII (see Write); i18n header decoding also occurs in list
window mail indexes, and for headers added to quoted mail text;
text payloads in the mail body are also decoded for display and
encoded for sends elsewhere in the system (list windows, Write);

3.0: creators of edit windows prefill Bcc header with sender email
address to be picked up here, as a convenience for common usages if
this header is enabled in mailconfig; Reply also now prefills the
Cc header with all unique original recipients less From, if enabled;
"""
top = Frame(self); top.pack (side=TOP, fill=X)
left = Frame(top); left.pack (side=LEFT, expand=NO, fill=BOTH)
middle = Frame(top); middle.pack(side=LEFT, expand=YES, fill=X)

headers set may be extended in mailconfig (Bcc, others?)

self.userHdrs = ()
showhdrs = ('From', 'To', 'Cc', 'Subject')
if hasattr(mailconfig, 'viewheaders') and mailconfig.viewheaders:
self.userHdrs = mailconfig.viewheaders
showhdrs += self.userHdrs
addrhdrs = ('From', 'To', 'Cc', 'Bcc') # 3.0: decode i18n specially

PyMailGUI Implementation| 1087