Ron K. Jeffries wrote:
> Slider is OK concept, if it works.
Yes, that little "if" is the problem ...
> It's not clear to me what the proposed
> alternative is or how it would be used.
The alternative would be to add buttons (either micro switches
or domes) where the slider is now. With three buttons, you'd
have the same functionality as with the slider now, minus
sliding.
Comparison buttons (3 of them) vs. slider:
Attribute Slider Button
--------------------------------------- --------------- ---------------
BOM cost "free" moderate / high
Response to dirt / aging immune degrade / fail
Mechanical load distribution case top PCB
(Unintended) activation threshold low medium
Signal processing demanding easy (debounce)
Tactile response no yes
Power consumption (when idle) polling none
Gestures, single touch 5 3 (5 ?)
multi touch n/a <= 4, may be messy
To scroll through a list, you'd press "up" or "down" repeatedly.
(There can be no auto-repeat because long presses are already
used for other functions.)
For example, when on the accounts list, the buttons are currently
assigned to the following functions:
Button Tap Long press Very long press
------- ----------------------- --------------- ---------------
Top Previous entry (up) Setup (1, 2) Setup (2)
Middle unassigned Select entry Select entry
Bottom Next entry (down) Switch off Zap session
(1) Would become "back" once directories are implemented and
you're in a subdirectory.
(2) Or "Alert" if an asynchronous notification is pending.
(Press "A" in the simulator to generate a radio alert.)
If you make a sliding movement while pressing on the slider,
fw/ui/input.c switches to slider mode and generates N pixels
up/down information.
You can play with all this in the simulator.
With more than three buttons, be it real or virtual (e.g., by
combining top/bottom and middle), auto-repeat would also be
possible. Going > 3 buttons may be get messy, though, given the
limited space.
> I am baffled as to how vi
> key bindings might be presented.
Ah, that's for the simulator:
Cursor key vi key Anelok slider area
--------------- --------------- ------------------
Up K Top
Left L Middle
Down J Bottom
> Your note is very clever.
Thanks ! :)
- Werner
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