[FEATURE REQUEST] Allow cancellation of Live-Z WITHOUT saving adjustment

[alexwhittemore]

I think this might be a duplicate of https://github.com/prusa3d/Prusa-Firmware/issues/1968, but I honestly can't tell.

If it makes sense, enter what type of printer or upgrade the feature request applies to. Printer type - Mk2.5, but I think all of the Mk<=3 series MMU Upgrade - N/A

I'm a power-user of "press and hold knob to change Z height." I.e. I very regularly finish a print, then press and hold to move the nozzle away. Or more often, cancel a failed print, then press and hold to move the nozzle away.

Helpfully, a few firmware updates ago introduced the ability to press-and-hold the knob to get to the Live Z adjustment while in-print. That's cool, since changing the Z height in a running print makes no sense.

Unhelpfully, the definition of "in a print" is VERY fuzzy, and I literally-every-time I cancel a print try to jog the extruder up, only to accidentally enter the live Z menu and mess it all up.

Since there's no option to cancel a live Z adjustment, my only recourse is to reset the printer at this point.

Describe the solution you'd like In the Adjusting Live Z modal, I'd LOVE a "press and hold to cancel." I.e. tapping the knob commits the new live Z, where long-pressing cancels out without saving the value.

[Panayiotis-git]

The long-press functionality as implemented at the moment is inconsistent. Look at the https://github.com/prusa3d/Prusa-Firmware/pull/3014#issuecomment-776993759 for more details. I believe that this event requires a clear definition, so a user is always sure what to expect from a long-press.

[gudnimg]

Just to highlight the inconsistencies mentioned by @Panayiotis-git below is the menu when the printer is not printing anything. Obviously not all the menus.

Menu	Long-Press	What does it do?
Status	X	Open move Z-axis menu
Preheat	X	Open move Z-axis menu
Print from SD card	X	Open move Z-axis menu
AutoLoad filament	X	Exit menu
Unload filament
Settings	X	Open move Z-axis menu
Calibration	X	Exit menu
Statistics	X	Exit menu
Fail stats	X	Exit menu
Support	X	Open move Z-axis menu
Settings->Temperature	X	Open move Z-axis menu
Settings->Move axis	X	Exit menu
Settings->Crash det.	X	Exit menu
Settings->HW Setup	X	Toggle the experimental menu visibility in HW setup
Settings->Mesh Bed Leveling	X	Exit menu
Settings->Lin. correction	X	Exit menu
Settings->Live Adjust Z	X	Open move Z-axis menu
Settings->Select Language	X	Exit menu
Settings->Brightness	X	Exit menu

[leptun]

@gudnimg I've updated the HW setup "What it does" column

[alexwhittemore]

TIL that you could move the Z axis while you were already in the middle of live adjust Z. Is that even real?

[github-actions[bot]]

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[github-actions[bot]]

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