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Task Description
The scrollpad on the H10 (20gb, not sure about 5/10gb) has always bothered me with being jumpy, inaccurate, and unintuitive. At the moment (in rockbox) it seems as though it is working as a simple two button device (up/down), with no real dragging capabilities. I am wondering if this is a limitation of the hardware or current software implementation.
The original firmware seemed to work as follows:
split slider into upper and lower field. Tapping in either upper or lower half would create click-type event for up/down. Dragging in upper half would produce scroll up, draggin in lower half would produce scroll down events. The problem was that upper and lower halves are really kinda arbitrary and not easily distinguishable.
What I think would work nicely:
Tapping top and bottom, as before. Remove upper and lower restrictions for dragging, i.e. if dragging down (anywhere on the scrollpad) create scroll down event, if dragging up (again, anywhere) create scroll up event. Drag and hold will scroll in desired direction proportional to the drag speed (as in pushing a puck on ice). Hold (just hold, no tap or drag) on the touchpad creates a sliding value that can be used as a coordinate for different types of continuous input.
To implement this, we’d need some kind of knowledge about what signals the actual hardware provides, what resolution the pad has, i.e. what the physical and logical implementations of the device are. I am not sure how the Ipod scrollwheel works, but it seems that some of that code could be re-purposed, maybe?
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