can u elaborate?
what's pmotion?

show me some example?

i did pmouse... but it's very complicated due to the pmouse's behaviour.
for example:
if a guy drags the mouse from 0 to 500 in x axis, (let's assume that the mouse does not move in y axis),
the pmouseX is not 0 and mouseX is not 500.
The 500 units in difference is in fact subdivided by the no of frames and the no of times draw() is executed.
Hence, the pmouseX might be 0 while mouseX might be 2... and then
pmouseX in the next draw might be 2 and mouseX might be 4... and so on...

Hence, it is very hard to determine whether the user is dragging the mouse in X or Y axis, since the difference in the pmouse and mouse is too small to compare in X and Y...

P/S: my initial idea was to see if(abs(mouseX-pmouseX)>abs(mouseY-pmouseY)).... to determine if the user is dragging in x or y...
but it fails terribly.