Dual monitor setup gives wrong aspect ratio

The wizardpen driver doesn't support KeepShape (yet?). You can try setting ScreenX and ScreenY to the resolution of the monitor you want to use. Let me know if that works.

My goal is to get a "KeepShape" option, which is enabled by default and correctly supports multiple monitors into 0.9

I have implemented an extention to wizardpen that exactly solved that:
I added a config flag biscreen = 0 (usual behavior) , 1 (map tablet on left screen), 2 (map tablet on right screen).

How can I integrate it in the distrib ?
These are really few lines of code, I can easily email them to somebody more responsible and aware about packaging than I am.
Mail me to Fabrice.Neyret AT inria.fr

Regards,

Fabrice

Fabrice: can you please attach your patch here, it'd be very useful for me at least. I'd like to restrict the pen to one monitor at a time.

See my patch below. The code editing was easy, but I don't know anything about packaging and reinserting into community project, so it would be cool that somebody who knows do the trick. (I had multiple individual request, I guess updating the official code would be really usefull).

Fabrice

Here is the detail:

....................................................................................
I added a simple extention allowing to use dual-screen (with one single large Desktop): rather than deforming the tablet-to-desktop mapping caused by the different aspect ratio (which shows very impractical in practice), I added a configuration variable 'biscreen' which, if set to 1 or 2, only maps the tablet on the left or right screen (which fit to the common usage: one gimp on one side and the remainder on the other). Value 0 correspond to the nowaday behavior.

....................................................................................
My modifications, based on version 0.6.0.2:
....................................................................................

* wizardpen.h:
   in "struct WizardPenPrivateRec":
     ADD:

       int screenflag;

* wizardpen.c:
    in "WizardPenPreInit() ":
      right before "// increment setting"
        ADD:

    s = xf86FindOptionValue(local->options, "BiScreen");
    if (s && strlen(s) > 0) {
    priv->screenFlag = atoi(s);
    xf86Msg(X_CONFIG, "%s: BiScreen = %d\n", local->name, priv->screenFlag);

* in "USBReadInput() "
       right before "if (1)"
         ADD:

     if (priv->screenFlag) {
            report_x /= 2; /* half of the bi-screen */
            if (priv->screenFlag==2) report_x += screenInfo.screens[0]->width/2;
    }
        if (1)

* in "ConvertProc() "
     right before "return TRUE"
       ADD:
         if (priv->screenFlag) {
            *x /= 2; /* half of the bi-screen */
            if (priv->screenFlag==2) *x += screenInfo.screens[0]->width/2;
    }

* in "ReverseConvertProc () "
    right before " valuators[]= "
       ADD:
          if (priv->screenFlag) {
        if (priv->screenFlag==2) x -= screenInfo.screens[0]->width/2;
         x *= 2; /* half of the bi-screen */
      }

enjoy !

Hey Fabrice, you need to make either a diff patch or a bazaar branch containing your changes.

http://developer.ubuntu.com/packaging/html/fixing-a-bug.html

I have the same issue with dual screens and I appreciate Fabrice's solution but I have to wonder if it isn't somewhat short-sighted. I can see a use for a much more general solution that doesn't assume simply two monitors side by side.

I'm thinking that what might be best is a set of four floating point numbers to indicate the 'percentage' of the display in each direction to which the tablet should be mapped: starting and ending x values and starting and ending y values. Each value would have a valid range of 0.0 to 1.0 where, for example an x value of 0.0 is the far left edge of the virtual screen and 1.0 is the far right.

Thoughts?