Logitech mouse specifics handling

[Nicolas Trangez]

Hija,

as one of the SoC'07 students of the GNOME project, I'll be working on
HID device handling in our desktop environment. One part of this is
related to the X server (on-line addition of devices to the server),
another inside the desktop, but obviously HAL will have an important
role too.

One thing I'd like to handle is Logitech-specific mouse functions.
Currently some other projects already provide these features (eg
resolution setting), both Lomoco[1] and KDE[2].
Adding this feature in the GNOME desktop too would imply more
code/functionality duplication, including device/capability maps etc.

So, I'd propose to add this functionality inside HAL (somewhat like the
screen brightness functionality, etc).
The way I see this:
- Add a new device capability, input.mouse.logitech
- On devices with this capability, add these properties and methods:
	* int BatteryLevel
	* int[] SupportedResolutions
	* int Resolution
	* bool DualChannelSupported
	* int Channel
	* setResolution(int)
	* setChannel(int)

This API is just a sample, obviously, and should follow the HAL
standards. Device-specific capabilities which can't be queried from the
mouse itself could be stored in FDI files.

Next to this, info.product/input.product could become a more specific
string too (although this might be handled in some other place, I'm not
very familiar with the low-level input stack yet), FDI based.

Any ideas on this? Or should this not be handled in HAL at all?

Thanks,

Nicolas

[1] http://lomoco.linux-gamers.net/
[2] Couldn't find the file in KDE's websvn, see
kcontrol/input/logitechmouse* in your local kdebase tarball
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