on-event

Called to handle mouse events on the snip when this snip can handle events and when the snip has the keyboard focus. See on-char for information about the arguments. See also wx:const-snip-handles-events in get-flags.

• (send a-wx:snip on-event dc x y mediax mediay event) -> void
      dc : wx:dc% object
      x : inexact real
      y : inexact real
      mediax : inexact real
      mediay : inexact real
      event : wx:mouse-event% object

  The x and y arguments are the snip's location in display coordiantes. The mediax and mediay arguments are the snip's location in buffer coordinates. To get event's x location in snip coordinates, subtract x from (send event get-x).