On 23 Mar 2020, at 9:14, Peter Howkins wrote:
You correctly note we use a heuristic to determine eigen values for the display and mouse. Eigen values are entirely a RISC OS concept, the VIDC hardware doesn't know about them.
Thanks for taking the time to write up such a detailed response. It's very useful to understand the thinking and design behind that particular code section. As far as EX0/EY0 goes, it is a difficult problem; the scaling is only known to the OS and the emulator can't restrict itself to specific OS versions or related assumptions. It's quite common for VMWare / Parallels-like VM solutions to include hosted-OS software that you install within the VM environment which allow the host OS and hosted OS to communicate - perhaps one day we might e.g. have a RISC OS module compatible with as wide-as-possible a range of RISC OS versions that communicates useful settings like eigenvalues through to the emulator.
In view of everything you've said, it might be that the patch I've been using isn't a great idea, though it is *only* having any effect when "mousehack" has been configured 'on' by the user. Tim's discovery of the accessibility features setting gives away what must've been going on with the UUID variations in behaviour. That said, under Linux we also see the exact same behaviour and the "mousehack" mode plus patch does seem to do the trick there too. It is definitely advantageous to be able to access the menu bar and get out of full screen mode in Mac OS, and advantageous to be able to thereafter scale the RPCEmu window and have the mouse coordinates still correctly mapped.
It's excellent to hear that at last for Mac OS, we can use the accessibility features setting to get things working in non-hack mode. For those using multiple binaries or on Linux, perhaps the patch will be a benefit.
Sorry to those who spotted there was no patch attached to my original message. I *did* attach it, but suspect the mailing list software rejected a ".patch" attachment. Since Tim's had success with a ".zip" file, I've attached it again, ZIPped up this time. Fingers crossed.
-- Andrew Hodgkinson RISC OS Open Limited http://www.riscosopen.org/
<<attachment: fullscreen-mouse.patch.zip>>
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