if not msgnums: # always verify here
showerror(appname, 'No message selected')
else:
if askyesno(appname, 'Verify delete %d mails?' % len(msgnums)):
self.doDelete(msgnums)

##################

utility methods

##################

def selectedMsgs(self):

get messages selected in main listbox

selections = self.listBox.curselection() # tuple of digit strs, 0..N-1
return [int(x)+1 for x in selections] # convert to ints, make 1..N

warningLimit = 15
def verifySelectedMsgs(self):
msgnums = self.selectedMsgs()
if not msgnums:
showerror(appname, 'No message selected')
else:
numselects = len(msgnums)
if numselects > self.warningLimit:
if not askyesno(appname, 'Open %d selections?' % numselects):
msgnums = []
return msgnums

def fillIndex(self, maxhdrsize=25):
"""
fill all of main listbox from message header mappings;
3.0: decode headers per email/mime/unicode here if encoded;
3.0: caveat: large chinese characters can break '|' alignment;
"""
hdrmaps = self.headersMaps() # may be empty
showhdrs = ('Subject', 'From', 'Date', 'To') # default hdrs to show
if hasattr(mailconfig, 'listheaders'): # mailconfig customizes
showhdrs = mailconfig.listheaders or showhdrs
addrhdrs = ('From', 'To', 'Cc', 'Bcc') # 3.0: decode i18n specially

compute max field sizes <= hdrsize

maxsize = {}
for key in showhdrs:
allLens = [] # too big for a list comp!
for msg in hdrmaps:
keyval = msg.get(key, ' ')
if key not in addrhdrs:
allLens.append(len(self.decodeHeader(keyval)))
else:
allLens.append(len(self.decodeAddrHeader(keyval)))
if not allLens: allLens = [1]
maxsize[key] = min(maxhdrsize, max(allLens))

populate listbox with fixed-width left-justified fields

self.listBox.delete(0, END) # show multiparts with *
for (ix, msg) in enumerate(hdrmaps): # via content-type hdr

PyMailGUI Implementation| 1075