|Syntax||PTR_KEY cursor, edge|
|Location||KMOUSE (DIY Toolkit - Vol I)|
Normally DIY Toolkit’s mouse driver will enable you to control the mouse pointer on screen. This mouse pointer is however, not the one used by the Pointer Environment (therefore the mouse cannot be used to control programs written specifically for the Pointer Environment except in cursor emulation mode) and you need a separate program to run in the background which will display a symbol to show the position of the mouse on screen.
Th PTR_KEY command allows you to specify whether the serial mouse driver should emulate the cursor keys (instead of the pointer), which allows it to operate software such as word processors.
To emulate the cursor keys, cursor should be 1 - to emulate the pointer again, set cursor to 0.
The DIY Toolkit mouse driver is actually better than the SERMouse driver in this respect in that the mouse does not automatically switch back into Pointer Mode when you leave the program (see SERMCUR). Then again, you cannot switch between the two modes using the mouse buttons, or control Pointer Environment programs…
The second parameter expected by this command is used to specify what should happen to the cursor (or pointer) at the edge of the screen - if edge=1, moving the cursor or pointer over the edge of the screen will make it re-emerge on the opposite edge (a wrapping effect). edge=0 disables this.