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In article <1988Nov19.180454.563@gpu.utcs.toronto.edu> romwa@gpu.utcs.toronto.edu (Mark Dornfeld) writes:
>
>When using the GEM event manager, is there a way of setting up
>an event which involves clicking one OR two buttons?  I
>am thinking of a case like the desktop, where one can select a
>disk by clicking once and get a directory by double-clicking.

If you refer to the documentation on evnt_button, you will note that the
first argument is ev_bclicks, which is 'the number of times the application
is waiting for the mouse button to enter a particular state (ev_bstate)
within a preset time.'

This argument should be 1 or 2, depending on how many clicks you wanna wait
for.  The return value ev_breturn is 'the number of times the button
actually entered the desired state within the preset time.  This number is
never less than 1 or greater than the number contained in ev_bclicks.'

So, ev_breturn is either 1 (single click) or 2 (double click). 

For evnt_multi, the number of button clicks is returned in the last argument,
ev_mbreturn.

- mike

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