[SOLVED] USB mouse, keyboard assigning to process not desktop, how to?

MrUmunhum · 11-27-2016, 02:01 PM

Hi group,
I need to assign my USB devices ( mouse and keyboard ) to a special program.
Currently, when these devices are plugged in they are assigned to the desktop. I wish to mimic the actions of Qemu. My program will capture
the actions of the devices and preform special programmed actions.

I hope I have made myself clear? Any suggestion?

Thanks for your time,

AwesomeMachine · 11-27-2016, 11:09 PM

I don't understand how what you want to do is different than a simple window capture.

MrUmunhum · 11-29-2016, 02:26 PM

Quote:

Originally Posted by AwesomeMachine

I don't understand how what you want to do is different than a simple window capture.

I do not understand what you mean by "simple window capture'?

Let us use a laptop as an example, you have the mouse pad and keyboard as input to the desktop. Now you attach a USB mouse or keyboard. Normally these new devices are added to the desktop as input devices. I want to be able to use these new devices as input to a program, the program will read the input of the USB HID devices and redirect them to another process.

I believe this will require 2 steps:

Remove the USB devices from Xorg.
Attach the HID devices to a program.

Does that make thing clearer?

Fat_Elvis · 12-13-2016, 02:33 PM

Quote:

Originally Posted by MrUmunhum

I do not understand what you mean by "simple window capture'?

Let us use a laptop as an example, you have the mouse pad and keyboard as input to the desktop. Now you attach a USB mouse or keyboard. Normally these new devices are added to the desktop as input devices. I want to be able to use these new devices as input to a program, the program will read the input of the USB HID devices and redirect them to another process.

I believe this will require 2 steps:

Remove the USB devices from Xorg.
Attach the HID devices to a program.

Does that make thing clearer?

You will need to go through X.org (if that's the display server on your distro) for that. The focuses of both the keyboard and mouse should be on the new program as soon as you click on its window.

Can you elaborate?

If you need lower level access to input devices, you will need to go into the source code and program it in yourself. I'm not certain it's possible to bypass X even then. Maybe read directly from /dev/hid-foo? At any rate, probably out of the scope of this section of the forums.

MrUmunhum · 12-20-2016, 09:11 PM

Quote:

Originally Posted by MrUmunhum

I believe this will require 2 steps:

Remove the USB devices from Xorg.
Attach the HID devices to a program.

I found this which solves part 1.

Code:

root:~; xinput 
⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ SynPS/2 Synaptics TouchPad              	id=12	[slave  pointer  (2)]
⎜   ↳ Logitech USB Receiver                   	id=15	[slave  pointer  (2)]
⎣ Virtual core keyboard                   	id=3	[master keyboard (2)]
    ↳ Virtual core XTEST keyboard             	id=5	[slave  keyboard (3)]
    ↳ Power Button                            	id=6	[slave  keyboard (3)]
    ↳ Video Bus                               	id=7	[slave  keyboard (3)]
    ↳ Power Button                            	id=8	[slave  keyboard (3)]
    ↳ Sleep Button                            	id=9	[slave  keyboard (3)]
    ↳ HD WebCam                               	id=10	[slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard            	id=11	[slave  keyboard (3)]
    ↳ Acer WMI hotkeys                        	id=13	[slave  keyboard (3)]
    ↳ Logitech USB Receiver                   	id=14	[slave  keyboard (3)]
    ↳ Logitech USB Receiver                   	id=16	[slave  keyboard (3)]
root:~; xinput --set-prop 15  "Device Enabled" O
will disable the USB mouse from Xorg.

As for part 2, I used evtest to verify I can still read from the USB mouse.

Also found this page with source:
http://cboard.cprogramming.com/linux...ted-mouse.html
Thanks for your time.