Python GUI does not update until entire process is finished
- by ccwhite1
I have a process that gets a files from a directory and puts them in a list. It then iterates that list in a loop. The last line of the loop being where it should update my gui display, then it begins the loop again with the next item in the list.
My problem is that it does not actually update the gui until the entire process is complete, which depending on the size of the list could be 30 seconds to over a minute. This gives the feeling of the program being 'hung'
What I wanted it to do was to process one line in the list, update the gui and then continue. Where did I go wrong? The line to update the list is # Populate listview with drive contents. The print statements are just for debug.
def populateList(self):
print "populateList"
sSource = self.txSource.Value
sDest = self.txDest.Value
# re-intialize listview and validated list
self.listView1.DeleteAllItems()
self.validatedMove = None
self.validatedMove = []
#Create list of files
listOfFiles = getList(sSource)
#prompt if no files detected
if listOfFiles == []:
self.lvActions.Append([datetime.datetime.now(),"Parse Source for .MP3 files","No .MP3 files in source directory"])
#Populate list after both Source and Dest are chosen
if len(sDest) > 1 and len(sDest) > 1:
print "-iterate listOfFiles"
for file in listOfFiles:
sFilename = os.path.basename(file)
sTitle = getTitle(file)
sArtist = getArtist(file)
sAlbum = getAblum(file)
# Make path = sDest + Artist + Album
sDestDir = os.path.join (sDest, sArtist)
sDestDir = os.path.join (sDestDir, sAlbum)
#If file exists change destination to *.copyX.mp3
sDestDir = self.defineDestFilename(os.path.join(sDestDir,sFilename))
# Populate listview with drive contents
self.listView1.Append([sFilename,sTitle,sArtist,sAlbum,sDestDir])
#populate list to later use in move command
self.validatedMove.append([file,sDestDir])
print "-item added to SourceDest list"
else:
print "-list not iterated"
