Re: Interactive white boards and Fedora Xorg setup

[Rodd Clarkson]

On Wed, 2010-07-07 at 11:01 +1000, Peter Hutterer wrote:
>  [faked-up reply, I'm not on the list, ajax pointed it out to me
> on the
>  archives. please make sure you CC me for any replies]
>  
>  > Unlike a mouse, these pointer devices move the mouse pointer to where
>  > you touch the screen.  For example, if the IWB is to the right of my
>  > laptop screen and I touch the right edge of the screen then the mouse
>  > pointer appears on the right side of my laptop screen, and not where
>  > I've touched the screen.
>  > 
>  > The pointer device included with the IWB needs to be able to be
>  > configured to do two things:
>  
>  > 1.  Only work as a device for the IWB screen.  The mouse shouldn't be
>  > able to be moved off the screen, only around it.
>  > 2.  Calibrate the pointer so that you can declare the
>  > top/bottom/left/right of the screen (as where the image falls on the
>  > pointer device isn't usually at the extremes of the device.)
>  >
>  > Is this possible?
>  
>  The 1.9 X server that's already in rawhide has an coordinate transformation
>  matrix to restrict absolute devices to essentially any rectangle on the
>  screen. The matrix is a property on each device and can be modified with the
>  xinput commandline tool (no GUI tools yet).
>  
>  For example, I've got a 1440x900 and a 1920x1200 display. To restrict my
>  tablet to the right (larger) screen:
>  $> xinput --set-prop "Wacom Intuos4 6x9" "Coordinate Transformation
> Matrix"
>  0.58 0 0.42 0 1 0 0 0 1  
>  
>  The matrix thus looks like this:
>  | 0.58 0 0.42 |
>  | 0    1 0    |
>  | 0    0 1    |
>  
>  giving us a scale into 58% of the screen range with an offset of 42%. Your
>  numbers will likely vary but that should fix the issue for you. 
Peter,

I've finally found a chance to take a look at this (now that I've got
f14 running on my laptop) and I need a little help understanding the
matrix.

In your case you have two screens with the same aspect ratio (16:10), so
I can see you your right hand screen is 0.58 of the total width and 0.42
across from the left hand side of the span.

However, I've got a situation where one of my screens (on my laptop) is
16:9 (1920x1080) and the other is 5:4 (1280x1024) and I'm not sure how
to set up the matrix for this.  Are you able to supply some extra
'clues'?  Can we assume the laptop screen will be on the left hand side
(as this is how it defaults in Fedora, and I should be able to figure
out how to adjust it if it's not)?

Also, where do I get the name for the pointer device?

I'm sorry to ask, but I've done some searching on google and couldn't
come up with the answers.

regards


Rodd

Interactive white boards and Fedora Xorg setup

[Adam Jackson]

On Wed, 2010-12-01 at 15:58 +1100, Rodd Clarkson wrote:

>  Also, where do I get the name for the pointer device? 
atropine:~% xinput list
⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ Unicomp  Endura Pro Keyboard            	id=9	[slave  pointer  (2)]
⎜   ↳ Macintosh mouse button emulation        	id=11	[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)]
    ↳ Power Button                            	id=7	[slave  keyboard (3)]
    ↳ Unicomp  Endura Pro Keyboard            	id=8	[slave  keyboard (3)]
    ↳ Vendor strings are placed here.   Nuforce   µDAC 	id=10	[slave  keyboard (3)]

- ajax

Interactive white boards and Fedora Xorg setup

[Kevin DeKorte]

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Hash: SHA1

On 12/01/2010 08:09 AM, Adam Jackson wrote:
>  On Wed, 2010-12-01 at 15:58 +1100, Rodd Clarkson wrote:
>  
> > Also, where do I get the name for the pointer device?
>  
>  atropine:~% xinput list
>  ⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
>  ⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
>  ⎜   ↳ Unicomp  Endura Pro Keyboard            	id=9	[slave  pointer  (2)]
>  ⎜   ↳ Macintosh mouse button emulation        	id=11	[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)]
>      ↳ Power Button                            	id=7	[slave  keyboard (3)]
>      ↳ Unicomp  Endura Pro Keyboard            	id=8	[slave  keyboard (3)]
>      ↳ Vendor strings are placed here.   Nuforce   µDAC 	id=10	[slave  keyboard (3)]
>  
>  - ajax
>   
Ajax,

I tried this with two mice on my system and I could not seem to restrict
the movement of one of the mice. The properties appear to be set correctly

xinput list-props  "Logitech USB-PS/2 Optical Mouse"
Device 'Logitech USB-PS/2 Optical Mouse':
	Device Enabled (140):	1
	Coordinate Transformation Matrix (142):	0.580000, 0.000000, 0.420000,
0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000

But the mouse still has full run of the screen.

Is there another command I need to run to make the xserver use those values?

Kevin
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Interactive white boards and Fedora Xorg setup

[Kevin DeKorte]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 12/01/2010 08:09 AM, Adam Jackson wrote:
>  On Wed, 2010-12-01 at 15:58 +1100, Rodd Clarkson wrote:
>  
> > Also, where do I get the name for the pointer device?
>  
>  atropine:~% xinput list
>  ⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
>  ⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
>  ⎜   ↳ Unicomp  Endura Pro Keyboard            	id=9	[slave  pointer  (2)]
>  ⎜   ↳ Macintosh mouse button emulation        	id=11	[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)]
>      ↳ Power Button                            	id=7	[slave  keyboard (3)]
>      ↳ Unicomp  Endura Pro Keyboard            	id=8	[slave  keyboard (3)]
>      ↳ Vendor strings are placed here.   Nuforce   µDAC 	id=10	[slave  keyboard (3)]
>  
>  - ajax
>   
But the properties do seem to work ok with my tablet.

xinput set-prop "Wacom BambooFun 4x5 stylus" "Coordinate Transformation
Matrix" 0.43 0 0.57 0 1 0 0 0 1

xinput set-prop "Wacom BambooFun 4x5 eraser" "Coordinate Transformation
Matrix" 0.43 0 0.57 0 1 0 0 0 1

Dual head, left is 1680, right is 1280, and I've confined it to the right.

Does the input restraining only work with absolute coordinate devices?

Kevin
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http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x7D0BD5D1
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