Wait for key press or mouse-button click
k = waitforbuttonpress
k = waitforbuttonpress blocks the caller's execution stream until the function detects that the user has clicked a mouse button or pressed a key while the figure window is active. The function returns
0 if it detects a mouse button click
1 if it detects a key press
If a WindowButtonDownFcn is defined for the figure, its callback is executed before waitforbuttonpress returns a value.
Only keys that generate characters cause the function to return. Pressing any of the following keys by itself does nothing: Ctrl, Shift, Alt, Caps_lock, Num_lock, Scroll_lock.
You can interrupt waitforbuttonpress by typing Ctrl+C, but an error results unless the function is called from within a try/catch block. You also receive an error from waitforbuttonpress if you close the figure by clicking the X close box unless you call waitforbuttonpress within a try/catch block.
These statements display text in the Command Window when the user either clicks a mouse button or types a key in the figure window:
w = waitforbuttonpress; if w == 0 disp('Button click') else disp('Key press') end