Help with listbox in DICOM

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Adam
Adam on 9 Feb 2012
Edited: Image Analyst on 7 Oct 2013
Hi, I have more questions? When you load paintings (DICOM) in the list box will display the first list, but when I select another from the listbox does not appear. Thanks a lot in advance.
h1=figure;
handles.ListBox=uicontrol('Units','Normalized','Position',[0.01 0.1 0.1 0.15],...
'Style','List');
P=fileparts(mfilename('fullpath'));
nfolder=uigetdir(P,'cokoliv');
handles.dfolder=nfolder;
dfiles=dir(handles.dfolder);
dfiles=dfiles(3:end);
nfiles=length(dfiles);
if nfiles<1
disp('no files availabel.')
return;
end
set(handles.ListBox,'String',char(dfiles.name),'value',1);
s = [num2str(nfiles) ' files in: ' handles.dfolder];
fname=get(handles.ListBox,'String');
fname=fname(get(handles.ListBox,'value'),:);
info=dicominfo([handles.dfolder '\' fname]);
Y1=dicomread(info);
imshow(Y1)
clims = [10 1800];

Answers (1)

Walter Roberson
Walter Roberson on 9 Feb 2012
Your part from 'fname=' onward should be in a separate routine that you have set as being the Callback for the uicontrol. This will probably require that you wrap your original code inside a function
function dilist
h1 = figure;
handles.ListBox=uicontrol('Units','Normalized','Position',[0.01 0.1 0.1 0.15],...
'Style','List', 'Callback', @dilist_callback);
P=<etc>
[...]
s = [num2str(nfiles) ' files in: ' handles.dfolder];
end
function dilist_callback(src, evt)
fname=get(handles.ListBox,'String');
fname=fname(get(handles.ListBox,'value'),:);
info=dicominfo([handles.dfolder '\' fname]);
Y1=dicomread(info);
imshow(Y1)
clims = [10 1800];
end
  1 Comment
Adam
Adam on 9 Feb 2012
I followed your instructions. But after launching matlab I reported the error:
??? Undefined variable "handles" or class "handles.ListBox".
Error in ==> dilist> dilist_callback at 23
fname = get (handles.ListBox, 'String');
??? Evaluating Error while uicontrol Callback
function dilist
h1 = figure;
handles.ListBox = uicontrol ('Units', 'Normalized', 'Position', [0.01 0.1 0.1 0.15], ...
'Style', 'List', 'Callback', @ dilist_callback);
P = fileparts (mfilename ('fullpath'));
nfolder uigetdir = (P, 'whatever');
handles.dfolder = nfolder;
dfiles = dir (handles.dfolder);
dfiles dfiles = (3: end);
nfiles = length (dfiles);
nfiles if <1
disp ('no files availabel.')
return;
end
set (handles.ListBox, 'String', char (dfiles.name), 'value', 1);
s = [num2str (nfiles) 'files in:' handles.dfolder];
end
dilist_callback function (src, evt)
fname = get (handles.ListBox, 'String');
fname = fname (get (handles.ListBox, 'value'), :);
dicominfo info = ([handles.dfolder '\' fname]);
Y1 = dicomread (info);
imshow (Y1)
clims = [10 1800];
end
do not know where I made a mistake? Thank you very much.

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