function start_Callback(hObject, eventdata, handles)
global isStart startTime
isStart= 1;
set(handles.slider_chopper, 'Value', startTime);
guidata(hObject, handles)
function stop_Callback(hObject, eventdata, handles)
global isStart stopTime
isStart=0;
set(handles.slider_chopper, 'Value', stopTime);
guidata(hObject, handles)
function slider_chopper_Callback(hObject, eventdata, handles)
global startTime stopTime isStart
if isStart== 1
startTime= get(hObject,'Value');
else
stopTime= get(hObject,'Value');
end
function slider_chopper_CreateFcn(hObject, eventdata, handles)
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor',[.9 .9 .9]);
end
global startTime stopTime isStart;
startTime = 0;
stopTime = 1;
isStart = 1;
So I was working with GUI, and ran across this problem. What the program is supposed to do, is if I click the start button (tagged start), and move the position of the slider (tagged slider_chopper), it will store the position in a variable startTime and does the same after clicking on the stop (tagged stop). This part works.
The part that does not work, is when I click start button again, the program is supposed to set the position of slider to the value of startTime, and same for the stop button and stopTime. So I used set in callback functions for start and stop to accomplish this, but it's giving me error (right after I click start or stop button) that says:
Struct contents reference from a non-struct array object.
Error in GUI>start_Callback (line 89)
set(handles.slider_chopper, 'Value', startTime);
Error in gui_mainfcn (line 95)
feval(varargin{:});
Error in GUI (line 42)
gui_mainfcn(gui_State, varargin{:});
Error in
matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)GUI('start_Callback',hObject,eventdata,guidata(hObject))
Error while evaluating UIControl Callback
What is the problem, and how do I fix this?
