Getappdata and setappdata

7 views (last 30 days)
Agata
Agata on 5 Dec 2011
Edited: John Kelly on 12 Jun 2014
Hi, I have a problem with getappdata and setappdata. I was wrote the matlab help but I don't understand everything. Do you have any example code with this metods?

Accepted Answer

Chandra Kurniawan
Chandra Kurniawan on 5 Dec 2011
Hello,
I will give you sample code for this topic.
I have a .fig file (figure) that consists of 2 axes (axes1 and axes2) and 2 pushbutton (pushbutton1 and pushbutton2).
Then, here the m-file code
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;
guidata(hObject, handles);
function varargout = untitled_OutputFcn(hObject, eventdata, handles)
varargout{1} = handles.output;
function pushbutton1_Callback(hObject, eventdata, handles)
I = imread('cameraman.tif');
imagesc(I, 'parent', handles.axes1);
setappdata(handles.pushbutton1,'img',I);
function pushbutton2_Callback(hObject, eventdata, handles)
J = getappdata(handles.pushbutton1,'img');
bw = im2bw(J);
imagesc(bw, 'parent', handles.axes2);
Watch at pushbutton1_callback. Fisrt I read image with command imread and display it to the axes1.
Then after finished, I store the variable I to the handle : 'pushbutton1' as name : 'img' with command :
setappdata(handles.pushbutton1,'img',I);
Then watch at pushbutton2_callback
I used command
J = getappdata(handles.pushbutton1,'img');
to get the the last value which I stored at handle 'pushbutton1' which name = 'img'.
And then I successfully create a binary image with input parameter 'J'

More Answers (1)

Paulo Silva
Paulo Silva on 5 Dec 2011
Edited: John Kelly on 12 Jun 2014

Categories

Find more on Interactive Control and Callbacks in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!