Jimmy Miller wrote: > I've been trying to get an isigraph to move to a certain location when > the user presses the up arrow key. I figured out how to get it to > move based on any key: > > test_pic_char =: 3 : 0 > wd 'setxywh pic 0 0 150 150' > ) > > But I'm unsure how to detect the up key. Based on the isigraph events > page (http://www.jsoftware.com/help/user/isigraph_events.htm), I > figured sysdata would be 21 when the user presses the up key:
The datatype of sysdata is always character. The numbers shown are the indices of the character values in a. (alphabet). You can just press a key, observe the value of sysdata, and then program for that value. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
