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 figure that is current when you call the waitforbuttonpress function is the only area in which users can press a key or click a mouse button to resume program execution. The return argument, k, can have these values:
0 if it detects a mouse button click
1 if it detects a key press
If a WindowButtonDownFcn callback 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 the waitforbuttonpress function by typing Ctrl+C, but it returns an error unless your code calls it from within a try/catch block. The waitforbuttonpress function errors if the user closes the figure by clicking the X (close box) unless your code calls the waitforbuttonpress function 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:
f = figure; w = waitforbuttonpress; if w == 0 disp('Button click') else disp('Key press') end