No, that is all wrong. First of all, you don't put the code to load up the listbox with filenames in the callback of the listbox, which gets executed when you click on an item in the listbox. The filenames have to be already in there so that the user can have something to click on. First of all, you need to have a function like LoadListBox(), which you call during your OpeningFcn function, or within the callback for your "Specify folder..." push button. Here's some code for that:
%=====================================================================
% --- Load up the listbox with image files in folder handles.ImageFolder
function handles = LoadImageList(handles)
ListOfImageNames = {};
folder = handles.ImageFolder;
if length(folder) > 0
if exist(folder,'dir') == false
msgboxw(['Folder ' folder ' does not exist.']);
return;
end
% fprintf(1, 'Getting list of images in folder: %s\n', folder);
else
fprintf('No folder specified as input for function LoadImageList.\n');
WarnUser('No folder specified as input for function LoadImageList.');
return;
end
% If it gets to here, the folder is good.
ImageFiles = dir([folder '\*.*']);
for Index = 1:length(ImageFiles)
baseFileName = ImageFiles(Index).name;
[folder2, name, extension] = fileparts(baseFileName);
extension = upper(extension);
switch lower(extension)
case {'.png', '.bmp', '.jpg', '.tif'}
% Allow only PNG, TIF, JPG, or BMP images
ListOfImageNames = [ListOfImageNames baseFileName];
otherwise
end
end
set(handles.lstImageList,'string',ListOfImageNames);
% Need to deselect everything otherwise if new folder has fewer files than the last folder used, the listbox won't show up.
set(handles.lstImageList,'value', []);
return; % from LoadImageList()
Next, you need to put this code in the callback for the listbox.
% Get image name
Selected = get(handles.lstImageList, 'value');
% If more than one is selected, bail out.
if length(Selected) > 1
baseImageFileName = '';
% Change mouse pointer (cursor) to an arrow.
set(gcf,'Pointer','arrow')
drawnow; % Cursor won't change right away unless you do this.
return;
end
% If only one is selected, display it.
ListOfImageNames = get(handles.lstImageList, 'string');
% Get the name of the item in the listbox that they clicked on.
baseImageFileName = cell2mat(ListOfImageNames(Selected));
% Prepend folder.
fullImageFileName = fullfile(handles.ImageFolder, baseImageFileName);
% Display the image.
imgOriginal = imshow(fullImageFileName);
