GUI made without GUIDE not updating

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qward
qward 2015-8-5
编辑： qward 2015-8-5
I'm trying to make a GUI that pops up as soon as the main function starts and it contains a checkbox that can be used to stop the program when it is in a loop:
function mainFcn
h.fig = figure('Position', [100 100 100 100]);
h.cancelBox = uicontrol('Style', 'checkbox',...
'String', 'Cancel?',...
'Position', [10 10 10 10]);
set(h.cancelBox, 'callback', {@cancelBox, h});
drawnow;
i = 1;
while i == 1
value = get(h.cancelBox, 'Value');
if value == 1
i = 0;
else
i = 1;
end
end
function cancelBox(hObject, eventdata, handles)
set(hObject, 'Value', 1);
guidata(hObject, handles);
When I use disp(value); to see the value I am getting for the current value of the checkbox. It always says that the checkbox has a value of 0.

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采纳的回答

Walter Roberson
Walter Roberson 2015-8-5
i == 0 is not an assignment statement.
Also your while loop is not giving an opportunity for any graphics interruptions. Graphics interruptions are only processed when there is a pause(), drawnow(), uiwait() or waitfor(), figure(), or the routine reaches the command prompt.
  1 个评论
qward
qward 2015-8-5
The i == 0; was an typo I'm sorry about that. But I tried using drawnow() and it worked perfectly thank you.

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