GUI, selecting a figure to close, if it exists?

I have a GUI that sometime at the end displays a new figure (handles.hf5). I create the new figure using:

handles.hf5=figure('position',[xpos, ypos, sz(2), sz(1)]);

When I run my GUI again, if this figure exists, I want to be able to close it. (sometimes I run the GUI with other options and no additional figure is required and so handles.hf5 does not exist.

I have tried the following but none work:

close all 

allPlots = findall(0, 'Type', 'figure', 'FileName', [])
delete(allPlots);

and

if ishandle(handles.hf5)
      close(handles.hf5)
  end

Answer 1

[Jason]

A reply on another question from Walter has resolved the issue.

figure1 is the tag of the main GUI.

fig1h = findall(0,'type','figure','Tag','figure1');  %Keep this open as its the main gUI figure
figh = findall(0,'type','figure');
other_figures = setdiff(figh, fig1h);
delete(other_figures)

Answer 2

[Walter Roberson]

If you are using R2014b or newer, use isgraphics()

In earlier releases, using ishandle() should work provided that the variable exists and has not been set to 0

if isfield(handles, 'hf5') && handles.hf5 ~= 0 && ishandle(handles.hf5)
  delete(handles.hf5);
end

Note: close() can be intercepted by the figure's CloseRequestFcn callback, but delete() cannot be intercepted.

[Jason]

Thankyou Walter, but its still keeping the figure open.

This is what I have done to try and investigate. In my pushbutton callback I have:

handles.hf5=figure('position',[xpos, ypos, sz(2), sz(1)]);
guidata(hObject, handles);
allPlots2 = findall(0, 'Type', 'figure', 'FileName', [])

and teh result of allplots is:

allPlots2 = 

    0x0 empty GraphicsPlaceholder array.

[Jason]

A bit more info. Here is the begining of my pushbutton call back:

function pushbutton11_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton11 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

%close all; 
 allPlots = findall(0, 'Type', 'figure', 'FileName', [])
% delete(allPlots); 

tf4 = isgraphics(handles.hf4)
tf5 = isgraphics(handles.hf5)

if isfield(handles, 'hf5') && handles.hf5 ~= 0 && ishandle(handles.hf5)
  delete(handles.hf5);
end

if isfield(handles, 'hf4') && handles.hf4 ~= 0 && ishandle(handles.hf4)
  delete(handles.hf4);
end

[sigma, fwhm]=xObjSize(hObject,eventdata,handles,IM);

%I then create another figure hf5.
handles.hf5=figure('position',[xpos, ypos, sz(2), sz(1)]);
guidata(hObject, handles);

I use tf4 and tf5 to show me the state of the handles.hf4 and handles.hf5 objects which are supposed to be my figures hf4 & hf5.

Later on in this callback I call a function xobjeSize which inside creates a figure hf4. Heres the main part.

function [sigma, fwhm] = xObjSize(hObject,eventdata,handles,IM)
% do some stuff and then create a figure
%Create Figure----------------------------------------------------------
fontSize=8
scrsz = get(groot,'ScreenSize');
sz = [400 1400]; % figure size
screensize = get(0,'ScreenSize');
xpos = ceil((screensize(3)-sz(2))/2); % center the figure on the
ypos = ceil((screensize(4)-sz(1))/2); % center the figure on the
handles.hf4=figure('position',[xpos, ypos, sz(2), sz(1)]);
guidata(hObject,handles);
tf4=isgraphics(handles.hf4)   %check status
%---------------------------------------------------------------------

The first time I run it, both figures are created and then persist. The 2nd time I run it, when I check to see the status of the figures hf4 and hf5 using the code sat the top of the callback

tf4 = isgraphics(handles.hf4)
  tf5 = isgraphics(handles.hf5)

i get an error for tf4

Reference to non-existent field 'hf4'.

hf5 works fine now and does indeed delete its figure so there is no accumulation. The only problem is the figure hf4.

[Walter Roberson]

You are using R2014b or later, so you should compare to groot instead of to 0, and you should perhaps check ~isempty() as well.

I have not gone through your code otherwise; it is after 5am here and I am going to head to bed.

[Jason]

Yes I am using 2014b.