How To Always Updating Data From Function To GUI In Matlab?

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QY Goh 2012-5-19

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https://ww2.mathworks.cn/matlabcentral/answers/38805-how-to-always-updating-data-from-function-to-gui-in-matlab

Hello everyone;

Nice to meet ur guys,i am new user in matlab and i currently doing some assignment by using matlab. I wish to knew how can i always update the value in the "edit text" function in Matlab Gui. Seem the value can always updating when in the matlab command window but it can't update in the GUI.Has ur guy has any idea about it?Can share it with me. Thank You and has a nice day. (^.^)

p/s:sorry for my bad English grammar.

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Answer 1

Jan 2012-5-19

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https://ww2.mathworks.cn/matlabcentral/answers/38805-how-to-always-updating-data-from-function-to-gui-in-matlab#answer_48372

Updated strings and other properties are displayed after a drawnow or pause command.

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QY Goh 2012-5-21

The Green colour tracking function coding:

function greencolortrack ()

global x1

x1=[0 0 0 0 0];

a = imaqhwinfo;

[camera_name, camera_id, format] = getCameraInfo(a);

count=1;

% Capture the video frames using the videoinput function

% You have to replace the resolution & your installed adaptor name.

vid = videoinput(camera_name, camera_id, format);

% Set the properties of the video object

set(vid, 'FramesPerTrigger', Inf);

set(vid, 'ReturnedColorspace', 'rgb')

vid.FrameGrabInterval = 5;

%start the video aquisition here

start(vid)

% Set a loop that stop after 100 frames of aquisition

while(vid.FramesAcquired<=30)

% Get the snapshot of the current frame

data = getsnapshot(vid);

% Now to track red objects in real time

% we have to subtract the red component

% from the grayscale image to extract the red components in the image.

diff_im = imsubtract(data(:,:,2), rgb2gray(data));

%Use a median filter to filter out noise

diff_im = medfilt2(diff_im, [3 3]);

% Convert the resulting grayscale image into a binary image.

diff_im = im2bw(diff_im,0.04);

% Remove all those pixels less than 300px

diff_im = bwareaopen(diff_im,300);

% Label all the connected components in the image.

bw = bwlabel(diff_im, 8);

% Here we do the image blob analysis.

% We get a set of properties for each labeled region.

stats = regionprops(bw, 'BoundingBox', 'Centroid');

% Display the image

imshow(data)

hold on

%This is a loop to bound the red objects in a rectangular box.

for object =1:length(stats)

if object<6

bb = stats(object).BoundingBox;

bc = stats(object).Centroid;

rectangle('Position',bb,'EdgeColor','r','LineWidth',2)

plot(bc(1),bc(2), '-m+')

a=text(bc(1)+15,bc(2), strcat('X: ', num2str(round(bc(1))), ' Y: ', num2str(round(bc(2)))));

%disp(' X-Coordinate Y-cordinate')

%x=gallery('uniformdata',[5 3],0);

%disp(x)

set(a, 'FontName', 'Arial', 'FontWeight', 'bold', 'FontSize', 12, 'Color', 'yellow');

x1(count)=bc(1);

x2 = bc(1);

y1(count)=bc(2);

sort(x1,'ascend');

sort(y1,'ascend');

drawnow update

fprintf('count is %d \n', count);

count=count+1;

if count == 6

count = 1;

end

hold off

end

%fprintf('%.2f',x1(1));

% Both the loops end here.

% Stop the video aquisition.

stop(vid);

% Flush all the image data stored in the memory buffer.

flushdata(vid);

=================================================================================

This is the coding for GUI

=================================================================================

function varargout = greencolorgui(varargin)

%global thumbvalue

% GREENCOLORGUI M-file for greencolorgui.fig

% GREENCOLORGUI, by itself, creates a new GREENCOLORGUI or raises the existing

% singleton*.

%

% H = GREENCOLORGUI returns the handle to a new GREENCOLORGUI or the handle to

% the existing singleton*.

%

% GREENCOLORGUI('CALLBACK',hObject,eventData,handles,...) calls the local

% function named CALLBACK in GREENCOLORGUI.M with the given input arguments.

%

% GREENCOLORGUI('Property','Value',...) creates a new GREENCOLORGUI or raises the

% existing singleton*. Starting from the left, property value pairs are

% applied to the GUI before greencolorgui_OpeningFcn gets called. An

% unrecognized property name or invalid value makes property application

% stop. All inputs are passed to greencolorgui_OpeningFcn via varargin.

%

% *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one

% instance to run (singleton)".

%

% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help greencolorgui

% Last Modified by GUIDE v2.5 18-May-2012 23:20:52

% Begin initialization code - DO NOT EDIT

gui_Singleton = 1;

gui_State = struct('gui_Name', mfilename, ...

'gui_Singleton', gui_Singleton, ...

'gui_OpeningFcn', @greencolorgui_OpeningFcn, ...

'gui_OutputFcn', @greencolorgui_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

% End initialization code - DO NOT EDIT

% --- Executes just before greencolorgui is made visible.

function greencolorgui_OpeningFcn(hObject, eventdata, handles, varargin)

% This function has no output args, see OutputFcn.

% hObject handle to figure

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% varargin command line arguments to greencolorgui (see VARARGIN)

% Choose default command line output for greencolorgui

handles.output = hObject;

% Update handles structure

guidata(hObject, handles);

% UIWAIT makes greencolorgui wait for user response (see UIRESUME)

% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.

function varargout = greencolorgui_OutputFcn(hObject, eventdata, handles)

% varargout cell array for returning output args (see VARARGOUT);

% hObject handle to figure

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure

varargout{1} = handles.output;

% --- Executes on button press in pushbutton1.

function pushbutton1_Callback(hObject, eventdata, handles)

% hObject handle to pushbutton1 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

%[thumbvalue]=greencolortrack ();

greencolortrack()

global x1

set(handles.Thumb,'string',num2str(x1(1)));

function Thumb_Callback(hObject, eventdata, handles)

% hObject handle to Thumb (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of Thumb as text

% str2double(get(hObject,'String')) returns contents of Thumb as a double

% --- Executes during object creation, after setting all properties.

function Thumb_CreateFcn(hObject, eventdata, handles)

% hObject handle to Thumb (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.

% See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor','white');

end

function Indexfinger_Callback(hObject, eventdata, handles)

% hObject handle to Indexfinger (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of Indexfinger as text

% str2double(get(hObject,'String')) returns contents of Indexfinger as a double

% --- Executes during object creation, after setting all properties.

function Indexfinger_CreateFcn(hObject, eventdata, handles)

% hObject handle to Indexfinger (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.

% See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor','white');

end

function middlefinger_Callback(hObject, eventdata, handles)

% hObject handle to middlefinger (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of middlefinger as text

% str2double(get(hObject,'String')) returns contents of middlefinger as a double

% --- Executes during object creation, after setting all properties.

function middlefinger_CreateFcn(hObject, eventdata, handles)

% hObject handle to middlefinger (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.

% See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor','white');

end

function ringfinger_Callback(hObject, eventdata, handles)

% hObject handle to ringfinger (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of ringfinger as text

% str2double(get(hObject,'String')) returns contents of ringfinger as a double

% --- Executes during object creation, after setting all properties.

function ringfinger_CreateFcn(hObject, eventdata, handles)

% hObject handle to ringfinger (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.

% See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor','white');

end

function littlefinger_Callback(hObject, eventdata, handles)

% hObject handle to littlefinger (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of littlefinger as text

% str2double(get(hObject,'String')) returns contents of littlefinger as a double

% --- Executes during object creation, after setting all properties.

function littlefinger_CreateFcn(hObject, eventdata, handles)

% hObject handle to littlefinger (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.

% See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor','white');

end

% --- Executes during object creation, after setting all properties.

function text2_CreateFcn(hObject, eventdata, handles)

% hObject handle to text2 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

=================================================================================

The problem was i wish to always updated the green colour tracking value in The Green colour tracking function to the Edit Text In GUI platform in real time.Got Anyway i can do it?Thank You Again~Mr.Walter .