MATLAB: Iam browsing images from a folder using GUI Matlab. Now I want create a next button so that i can obtain all pics by pressing next. How to do that

Question

The code I used for browsing was

[filename,pathname]=uigetfile({'*.jpg';'*.png';'*.tif'},'File selector');
image=strcat(pathname,filename);
axes(handles.axes1);
imshow(image);
set(handles.edit2,'String',filename);
set(handles.edit4,'String',image);

Answer 1

function next_Callback(hObject, event, handles)
  curfile = get(handles.edit4,'String');
  if isempty(curfile)
    uiwait(msgbox('You need to have selected a file first before you can Next'));
    return
  end
  [pathname, basename, ext] = fileparts(curfile);
  dinfo = dir( fullfile(pathname, ['*' ext]) );
  filenames = fullfile(pathname, {dinfo.name});
  [tf, curidx] = ismember(curfile, filenames);
  if ~tf
    uiwait(msgbox('Current file not found in directory, do not know which one is Next'));
    return;
  end
  if curidx == length(filenames)
    uiwait(msgbox('At end of directory, no Next to go to'));
    return;
  end
  nextfile = filenames{curidx+1};
  [~, nextbase, nextext] = fileparts(nextfile);
  nextname = [nextbase nextext];
  set(handles.edit2, 'String', nextname);
  set(handles.edit4, 'String', nextfile);
  imshow(handles.axes1, nextfile);