(9926) Multi-Headed DECwindows Displays?

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(9926) Multi-Headed DECwindows Displays?

Post by User » Sun Nov 14, 2004 8:26 am

This is a DECWindows Question. Under Motif 1.2-6 is there a way to configure a two headed AlphaStation DS20 so that the pointer (cursor) will pass from one head to another in the vertical direction. This is the case for the application, where the monitors are positioned one on top of the other, making the most visually optimal path for moving from on head to the another from the top of the bottom monitor and from the bottom of the top monitor. I have checked every config file that I can find, looking for an entry that relates to this. Is this possible?
Last edited by marty.stu on Mon Jan 10, 2022 10:40 am, edited 1 time in total.


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Re: (9926) Multi-Headed DECwindows Displays?

Post by Wizard » Mon Nov 15, 2004 8:26 am

A package such as Xinerama might be of interest; support for virtual stacking of multiheaded X Windows displays is available in DECwindows releases more current than V1.2-6. Please see the DECwindows
documentation: https://docs.vmssoftware.com/vsi-decwin ... ent-guide/ (for current DECwindows releases) for details of configuring and using Xinerama.

Older implementations of DECwindows such as V1.2-6 have a less flexible relationship among multiple screens, and typically assume a horizontal organization. Both left-to-right and right-to-left can be configured.

By default, whichever physical screen is X Windows screen 0 will be the default application screen though this can be changed with the SET DISPLAY command or with the default application screen mechanism via the symbol DECW$APPSSCREEN within the file:

Code: Select all

SYS$MANAGER:DECW$PRIVATE_APPS_SETUP.COM
For example, if you want the login box to appear on the right-side screen in a typical two-headed multi-headed system, add the line:

Code: Select all

$  DECW$APPSSCREEN==1
into DECW$PRIVATE_APPS_SETUP.COM.

With Xinerama, you have full flexibility to locate the adjacencies among the various screens as desired, and vertical orientations among the available DECwindows X Windows screens are supported.

Do ensure you have installed the current ECO kit for the particular DECwindows release in use, as well as current ECOs for OpenVMS.
Last edited by marty.stu on Mon Jan 10, 2022 10:43 am, edited 1 time in total.

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