HID Device Detection
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I have a need to detect if data is coming from a real keyboard or a barcode reader that reports itself as a keyboard and sends keystrokes and react differently to that input versus the real keyboard or a virtual keyboard.
From my googling I've reached the understanding that this will have to be accomplished in a different manner on different platforms, my first concern is Linux, and I haven't been able to find anything that would point me in the right direction to accomplish my goal.
How do I tell my application to listen to the keyboards differently?
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Hi,
Since we are talking about linux and without diving too deep in Qt's internals you could create an object that reads directly from the correct input device in /dev. Your widget would have to ignore all key events and get feed from that special keyboard reader.
Hope it helps
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https://github.com/bimetek/QUSB
I followed your advice to read the device directly from /dev/foo, to figure out what subdirectory I need to be reading from I found the linked wrapper for libUSB. I'm almost positive there is a way to use that wrapper to do the actual reading so I don't have to open a device file, but I'm not sure how yet. I just thought it may be of some interest to other developers using Qt that there is a prettier way than directly calling libUSB functions.
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You can also setup your system to give a specific name to that device so you don't have to search with special means
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Can multiple different devices be assigned the same friendly name?
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If they are not connected at the same time it should be possible. It depends on what you are using on your target distribution to handle devices.
