wait/retrieve data from another GUI

Hi, my program uses a button in the main GUI to popup another GUI for settings. However, I want my main GUI to wait for that GUI to finish (i.e click OK button) and response immediately for the changes made by that GUI. Any idea how I can do that?

Answer 1

[Chandra Kurniawan]

Hi,

it is possible to do with small trick.

When passing data between GUIs, the idea is via MAT file.

I have 2 GUIs as shown in picture below :

In the first GUI, button 'Threshold' will execute second GUI.

In second GUI, you should threshold the image by changing the slider position and then click OK.

The thresholded image will appears in axes1 of first GUI.

Just try it. I will not explain more.

You should design the GUIs and here the code :

FIRST GUI

-------------------

function varargout = untitled(varargin)
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @untitled_OpeningFcn, ...
                   'gui_OutputFcn',  @untitled_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1}),    gui_State.gui_Callback = str2func(varargin{1});    end
if nargout,    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else,    gui_mainfcn(gui_State, varargin{:});    end

function untitled_OpeningFcn(hObject, eventdata, handles, varargin)
handles.output = hObject;
handles.I = imread('cameraman.tif');
imshow(handles.I);
guidata(hObject, handles);

function varargout = untitled_OutputFcn(hObject, eventdata, handles) 
varargout{1} = handles.output;

function pushbutton1_Callback(hObject, eventdata, handles)
handles.output = hObject;
tempImg = handles.I;
save('temp.mat','tempImg','-append');
uiwait(untitled2);

load('temp.mat');
handles.I = tempbw;
imshow(handles.I);
guidata(hObject, handles);

SECOND GUI

-------------------

function varargout = untitled2(varargin)
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @untitled2_OpeningFcn, ...
                   'gui_OutputFcn',  @untitled2_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1}),    gui_State.gui_Callback = str2func(varargin{1});    end
if nargout,    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else,    gui_mainfcn(gui_State, varargin{:});    end

function untitled2_OpeningFcn(hObject, eventdata, handles, varargin)
handles.output = hObject;
load temp.mat
handles.I = tempImg;
handles.bw = handles.I;
imshow(handles.I);
set(handles.slider1,'min',0,'max',1,'sliderstep',[.1 .1]);
guidata(hObject, handles);

function varargout = untitled2_OutputFcn(hObject, eventdata, handles) 
varargout{1} = handles.output;

function slider1_Callback(hObject, eventdata, handles)
handles.output = hObject;
thresh = get(handles.slider1,'value');
handles.bw = im2bw(handles.I,thresh);
imshow(handles.bw);
guidata(hObject, handles);

function slider1_CreateFcn(hObject, eventdata, handles)
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor',[.9 .9 .9]);
end

function pushbutton1_Callback(hObject, eventdata, handles)
handles.output = hObject;
tempbw = handles.bw;
save('temp.mat','tempbw','-append');
close(untitled2);

function pushbutton2_Callback(hObject, eventdata, handles)
close(untitled2);

I hope this clear.

[Chandra Kurniawan]

First, don't forget to create the MAT file

tempImg = imread('cameraman.tif');

tempbw = tempImg;

save('temp.mat','tempImg','tempbw');

Answer 2

[Vinh]

it worked bro. Cheers.

[Vinh]

by the way, my processed images are extremely big (~4500 x 3000) so it is better to save the setting info into .mat rather than saving images into .mat