Increment variable as function of time a button is held down

Is there a way to somehow capture the amount of time that a button is held down, and use it to update, in real time, a variable? my specific interest is in using a button to spin a 3d figure. I can get it to do so, but only in increments (click,*spin n rads*,click,*spin n rads* etc).

I have looked for something like this and have been unable to find an answer.

thanks, Alex

Answer 1

[Jan]

You can use the 'WindowsButtonUpFcn' of the figure to catch the release of the button.

[Alex V]

this is precisely what i knew must exist, hadn't thought to look for it in the figure properties, thank you.

so if you wanted to do this the code would be something like:

function button_callback(blahblah)

stop = 0

i = tic;

while stop = 0

handles.t = toc(i);

handles.tsum = handles.tsum+handles.t;

disp(handles.tsum)

stop = get(handles.button,'UserData');

pause(0.1)

end

WindowsButtonUpFcn_figure1(blah)

set(handles.button,'UserData',1);

and the code would behave by displaying the incremented time every 0.1s?

this seems like a really clumsy way of doing it, im sure there's a better way, could you suggest at least a direction? much obliged for the answer to the original question at least, either way.

Cheers,

Alex