how to use waitbar to show file copying status
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This is my code under a push button in GUI. I want that it should show the progress of the file copying status with the use of "waitbar" command or by any other means .It will be very helpful if someone can provide a sample code, though help are available in matlab but I m unable to figure it out how it can be used for displaying file copying status. Thanks
% --- Executes on button press in pushbutton44.
function pushbutton44_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton44 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
global dirpath_import;
dirpath_import= uigetdir();
set(handles.edit38,'String',dirpath_import);
importpath=get(handles.edit38,'String');
exportpath=get(handles.edit1,'String');
copyfile(importpath,exportpath);
msgbox('Import/Copy Complete');
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Akzeptierte Antwort
Jan
am 4 Aug. 2017
Bearbeitet: Jan
am 4 Aug. 2017
While it does not matter, that the code is part of a callback, the relevant part is only:
copyfile(importpath, exportpath)
During this command Matlab is blocked an there is no chance for any progress indicators. If this is really required, you can create your own function to copy the file in blocks of e.g. 1MB:
function myCopyFile(source, dest)
FileInfo = dir(source);
FileSize = FileInfo.bytes;
waitH = waitbar(0, sprintf('Copying %.2f MB', FileSize/1e6);
inFID = fopen(source, 'r');
if inFID == -1
error('Cannot open file for reading: %s', source);
end
outFID = fopen(dest, 'w');
if outFID == -1,
fclose(inFID);
error('Cannot open file for writing: %s', dest);
end
chunk = 1e6;
nChunk = ceil(FileSize / chunk);
iChunk = 0;
while ~feof(inFID)
iChunk = iChunk + 1;
waitbar(iChunk / nChunk, waitH);
data = fread(inFID, chunk, '*uint8');
fwrite(outFID, data, 'uint8');
end
fclose(inFID);
fclose(outFID);
end
UNTESTED
Attention: File handling is a critical job. If the disk is full or the destination is on a network drive and loosing the connection, this cheap and naive implementation of a copyfile does not show a warning and might leave the file system in a corrupted state. The user can kill the copying by Ctrl-c also. I would not dare to do this in a productive system. Care for backups. Check the file system. Insert consistency checks, e.g. by counting the number or read and written bytes by catching the output of fread and fwrite.
3 Kommentare
Jan
am 8 Aug. 2017
Bearbeitet: Jan
am 8 Aug. 2017
function S = GetFolderSize(FilePath)
% Get size of files contained in a folder
% Author: Jan Simon, Licence: CC BY-SA 3.0
FileList = dir(FilePath);
FileList(ismember({FileList.name}, {'.', '..'})) = [];
isFolder = [FileList.isdir];
S = sum([FileList(~isFolder).bytes]); % Sum file file sizes
for iFile = find(isFolder) % Recursion for folders
S = S + GetFolderSize(fullfile(FilePath, FileList(iFile).name));
end
end
UNTESTED Note that running this can need a lot of time already.
Weitere Antworten (1)
Walter Roberson
am 5 Aug. 2017
You could use system() to start the copy, and you could add the & character to the command so that it returns immediately. Then you could go into a loop using dir() to check the size of the destination file and use that to update a waitbar.
However, watch out for these factors:
- on some operating systems, there is no visible result in the target directory until the point at which the copy finishes, at which time the file suddenly appears, complete.
- on MacOS, the temporary file that appears is typically named as the file name plus a ".part" extension, so it would be that file name whose size you had to monitor
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