How to use the same directory for all functions in app designer?

Question

Lavanya 2022-6-24

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1747420-how-to-use-the-same-directory-for-all-functions-in-app-designer

编辑： Lavanya 2022-7-5

windowsmovie.m

I have created a GUI, in that when I add the data from a folder it will load .csv and text files. Now I wanted to add images(.png) lauanch with image viewer from the same directory in app designer.

(Here I have enclosed the example file. i.e It will ask for the select file from the directory after that it launches windows media player with the file.)

But for GUI, without using the 'baseFileName = uigetfile('*.png')' , Is it possible to select from the directory? by using 'uigetfile' it is again asking to select the folder.

for example : it should be like this baseFileName = '*.png'

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Jan 2022-6-24

在 MATLAB Online 中打开

I do not understand, what you are asking for. Do you want to process all PNGs fils inside a specific folder?

Folder   = 'D:\Yor\Folder';
FileList = dir(fullfile(Folder, '*.png'));
for k = 1:numel(FileList)
    aFile = fullfile(FileList(k).folder, FileList(k).name);
    % Now do what you need with this file
end

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Answer 1

Image Analyst 2022-6-24

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https://ww2.mathworks.cn/matlabcentral/answers/1747420-how-to-use-the-same-directory-for-all-functions-in-app-designer#answer_992875

在 MATLAB Online 中打开

This works on my computer:

Folder   = 'E:\Movies';
% FileList = dir(fullfile(Folder, '*.mkv'));
FileList = dir(fullfile(Folder, '*.wmv'))
% Not sure WMP plays .mkv files????  Does it?
if isempty(FileList)
    errorMessage = sprintf('Error: no video files found in\n%s.', Folder);
    fprintf('%s\n', errorMessage)
    uiwait(warndlg(errorMessage));
    return;
else
    fprintf('Found %d videos in "%s".\n', length(FileList), Folder);
end
% Play all videos one after the other.
for k = 1:numel(FileList)
    fullFileName = fullfile(FileList(k).folder, FileList(k).name);
    % First construct the command line for the system() function.
    % Enclose all filenames in double quotes because we may have spaces in the filenames.
    arguments = sprintf('"%s"', fullFileName);
    commandLine = sprintf('"%s" %s', editorFullFileName, arguments);
    fprintf('%s', commandLine);
    system(commandLine);
    promptMessage = sprintf('Do you want to play the next video,\nor Quit processing?');
    titleBarCaption = 'Continue?';
    buttonText = questdlg(promptMessage, titleBarCaption, 'Continue', 'Quit', 'Continue');
    if contains(buttonText, 'Quit', 'IgnoreCase', true)
        return; % or break or continue.
    end
end

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Image Analyst 2022-6-27

在 MATLAB Online 中打开

I tried adding a & after the command line and that let me choose a new video however it played in the same instance of the media player as the last one.

% Initialization Steps.
clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
clear;  % Erase all existing variables. Or clearvars if you want.
workspace;  % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 20;
folder   = 'D:\My Videos';
% FileList = dir(fullfile(Folder, '*.mkv'));
FileList = dir(fullfile(folder, '*.wmv'))
% Not sure WMP plays .mkv files????  Does it?
editorFullFileName = 'C:\Program Files\Windows Media Player\wmplayer.exe';
if ~isfile(editorFullFileName)
    errorMessage = sprintf('Cannot find the Windows Media Player program.\n%s', editorFullFileName);
    uiwait(warndlg(errorMessage));
    return;
end
if isempty(FileList)
    errorMessage = sprintf('Error: no video files found in\n%s.', folder);
    fprintf('%s\n', errorMessage)
    uiwait(warndlg(errorMessage));
    return;
else
    fprintf('Found %d videos in "%s".\n', length(FileList), folder);
end
% Have user browse for a file, from a specified "starting folder."
% For convenience in browsing, set a starting folder from which to browse.
startingFolder = folder;  % or 'C:\wherever';
if ~isfolder(startingFolder)
    % If that folder doesn't exist, just start in the current folder.
    startingFolder = pwd;
end
% Get the name of the file that the user wants to use.
defaultFileName = fullfile(startingFolder, '*.*');
[baseFileName, folder] = uigetfile(defaultFileName, 'Select a file');
if baseFileName == 0
    % User clicked the Cancel button.
    return;
end
fullFileName = fullfile(folder, baseFileName)
% First construct the command line for the system() function.
% Enclose all filenames in double quotes because we may have spaces in the filenames.
arguments = sprintf('"%s"', fullFileName);
commandLine = sprintf('"%s" %s &', editorFullFileName, arguments);
fprintf('%s', commandLine);
% Play the video.
system(commandLine);

Some programs are like that, where they only allow one instance at a time. You might try with different video players to see if they allow multiple instances. Even if I double clicked or selected multiple videos from File Explorer, it only lets me have one instance running at the same time.

Lavanya 2022-6-28

Ok, thank you . I will try these

Lavanya 2022-7-4

编辑：Lavanya 2022-7-5

I have create two apps. 1.GUI

2. Listboxedit

From GUI button click, it will open a new window with the Listbox data( it will open 2nd app ListBox edit). Till now Its working good.

But I wanted to activate the app2. When I click moveup it should change the Listorder by moving upward button. In Editfield, it should show Listbox name. Finally I wanted to save all these details and it should update data in Main GUI.

I have enclosed the image and code should work like this

For your reference I have enclosed the ListBox edit. kindly suggest a way for this?

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Answer 2

Image Analyst 2022-6-24

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1747420-how-to-use-the-same-directory-for-all-functions-in-app-designer#answer_992660

在 MATLAB Online 中打开

Try this:

folder = pwd; % wherever you want
% Get a list of all .txt, .png, and .csv files:
fileList = [...
    dir(fullfile(folder, '*.txt'));...
    dir(fullfile(folder, '*.png'));...
    dir(fullfile(folder, '*.csv'))]
% If you want all the names put one cell array:
allFileNames = fullfile({fileList.folder}, {fileList.name})'
% Now files are listed in the order you called dir().
% If you want the list sorted alphabetically:
allFileNames = sort(allFileNames)