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    <p>You can achieve interrupt play by setting the <code>Enable</code> property of your slider to <code>off</code> or <code>inactive</code> when you press your play button and using a <code>ButtonDownFcn</code> function that stops play and sets <code>Enable</code> back to <code>on</code>.</p> <p>Using a <code>togglebutton</code> as my play button (other control widgets should work as long as you can save a boolean flag somewhere accessible), I used the following as <code>Callback</code> for the button:</p> <pre><code>function playcallback(toggle_button, ~, slider_) set(slider_, 'Enable', 'inactive'); %slider is disabled while get(toggle_button, 'Value') %Value is used as flag for playing current_value = get(slider_, 'Value'); set(slider_, 'Value', rem(current_value + 0.01, 1)); %shift slider (looping) pause(1/50); end set(slider_, 'Enable', 'on'); %done playing, turn slider back on end </code></pre> <p>And the following as <code>ButtonDownFcn</code> for the slider:</p> <pre><code>function stopslide(~, ~, toggle_button) %play flag off: in playcallback, the while loop stops, %the slider is enabled and the playcallback function returns set(toggle_button, 'Value', 0); end </code></pre> <p>You can register these callbacks like this:</p> <pre><code>set(toggle_button_handle, 'Callback', {@playcallback, slider_handle}); set(slider_handle, 'ButtonDownFcn', {@stopslide, toggle_button_handle}); </code></pre> <p>Caveat: if you start adding other widgets interacting with the slider/play button in a similar manner to this, you increase your chance of introducing race conditions.</p>
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    1. POButtondownfcn doesn't work on slider
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    1. USAE426082
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    1. COI know I can do that but then you wouldn't be able to change time while the data is being reproduced and that is not very user friendly :)
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      1. USVladimir Perković
    2. COOk. I think I don't entirely understand how you use the slider in your GUI. Have you got an example application you want to emulate to show? So far I understand it the following way: you get data from an external source (50 times per second); you keep a buffer of data for N samples; the slider is used to pick which sample to display; the display will always update every 1/50 of a second, unless paused.
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