SDL pen instance IDs.
Zero is used to signify an invalid/null device.
These show up in pen events when SDL sees input from them. They remain consistent as long as SDL can recognize a tool to be the same pen; but if a pen physically leaves the area and returns, it might get a new ID.
See Implementation
SDL pen instance IDs.
Zero is used to signify an invalid/null device.
These show up in pen events when SDL sees input from them. They remain consistent as long as SDL can recognize a tool to be the same pen; but if a pen physically leaves the area and returns, it might get a new ID.