Problem with "drawnow" function and axes - GUI MATLAB

2013 6 12
1 个回答
7 次查看（30 天）

0 个投票

I developed an interface (GUI), containing 2 axes. Each axes is assiociated with a "pushbutton" called "StartCam". What basicilly happens is that when pushbutton is called, the following call-back function is called:
function StartCam1_Callback(hObject, eventdata, handles)
url = 'http://192.168.1.2:80/jpg/image.jpg?timestamp=';
ss = imread(url);
fh = image(ss);
while(1)
ss = imread(url);
set(fh,'CData',ss);
axes(handles.axes1);
drawnow;
end
% --- Executes on button press in StartCam2.
function StartCam2_Callback(hObject, eventdata, handles)
url = 'http://192.168.1.3:80/jpg/image.jpg?timestamp=';
ss = imread(url);
fh = image(ss);
while(1)
ss = imread(url);
set(fh,'CData',ss);
axes(handles.axes2);
drawnow;
end
Two IP cameras with Two url's as shown above in the code, the problem is when the I run the GUI, I cant get to stream cam1 on axes1 and cam2 on axes2.
I thought using axes(handles.axes1); before drawnow is supposed to draw the stream on axes2 but it gives back an error.
So,How can I draw each stream on its individual axes ?? Thanks % code end

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Sean de Wolski
Sean de Wolski 2013-6-12
What error? Please post the full error message.
Shadi Al Mahallawy
Shadi Al Mahallawy 2013-6-12
Actually, there isnt an error, both pushbuttons work fine, but all on the same axes, instead of "StartCam1"--> "Axes1" and "StartCam2" -- >"Axes2", they both draw on Axes1. Sorry for the mix up

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回答（1 个）

Image Analyst
Image Analyst 2013-6-12

0 个投票

Try
fh = imshow(ss, 'Parent', handles.axes1); % or axes 2 depending on which you want.

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