Why can't i open uigetdir dialog box while run the program?

When i place a break point on the line of function uigetdir(), i can open the dialog box when i step over (F10) the function line.

But if i remove the break point and run the program, the execution will pass the line of function uigetdir() and no dialog box shows up.

I wonder if i need to add uiwait() after that, but i don't know how to use it. If i directly add uiwait() after it, it will hold the whole program.

Thanks!

Answer 1

[Image Analyst]

You don't need uiwait() after the call to uigetdir(). Can you post a small snippet of the program to illustrate your problem. For example, this code definitely asks for the folder before it puts up the message box:

clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
clear;  % Erase all existing variables.
workspace;  % Make sure the workspace panel is showing.

folder = uigetdir();
msgbox('Done with demo');

[Image Analyst]

SEA-KEONG's "Answer" moved here:

The code is pretty straight forward, just want to get the directory path. If i run the program with no break point on 3rd line, the execution will pass the 3rd code line and get the directory path EMPTY. Thanks!

code for example below:

h = msgbox('Please Select the Least Sensitivity Camera Data Folder', 'MESSAGE', 'none'); 
uiwait(h);
leastCamDataFolder = uigetdir('\\doc\spg_salus\HDRCharacterization_Data', 'Select least camera data folder');
dataFolder = fullfile(leastCamDataFolder, '../');

[Image Analyst]

It worked fine for me (once I changed the starting folder). Didn't matter if there was a breakpoint or not. If you want, you can try this code:

uiwait(helpdlg('Please Select the Least Sensitivity Camera Data Folder'));
leastCamDataFolder = uigetdir('C:/', 'Select least camera data folder')
dataFolder = fullfile(leastCamDataFolder, '../')

[SEA-KEONG]

Yes. If i change the starting folder to 'C:\', the dialog shows.
But the question is why it cannot show on my old starting folder? Actually the old starting folder does exist. Suppose I can set the starting folder on anywhere i want, right?

Thanks!

[Image Analyst]

When I had your server there it was the same thing. It was trying to access the server via uigetdir(), but it just hung because it was taking a long time trying to find it, which of course it never would since it's not on my LAN.

[SEA-KEONG]

so anyway i can let uigetdir() hang a little bit longer? Actually the hanging time is not that long... Thanks!

[Image Analyst]

I'm sure it doesn't take that long for you because you have access to that folder on your server. But the point is, I don't see any difference depending on if there is or is not a breakpoint. Either way it calls uigetdir() before it continues on.