[14:02] <enyc> hrrm, I've worked out  Cinnamon screenshot reprogrammable for output path and filename, no problems there.  Looks like  printer-driver-cups-pdf  can do something similar, no problems there --  i.e. so Cinnamon screenshots and 'general printing'  can default to Properly Dated files in same directory.
[14:03] <enyc> BUT -- it would THEN be amazingly helpful to have some 'container' or 'alternate file browser / PDF viewer'  that can be set to 'default to actual physical printer'  from the point of view of handling the files in resultant directory  (or indeed pdf files generally)
[14:03] <enyc> any $ideas especially on  PDF viewer that can be set for a different default-printer to the system-wide default, etc ?
[14:15] <enyc> Seems that this fundamentally boils down to:  Do the various GTK/ print dialog / etc  libraries ahev some mechanism/adaptable  so you can arrange specific programs (especially picture viewer and pdf viewer)  to use a different default-printer to others, or similar ?
[18:56]  * enyc meows in Eickmeyer 's direction 
[18:57]  * Eickmeyer blinks
[18:58] <Eickmeyer> enyc: So, you're looking for something that can be set as the system-wide iviewer for PDF files or... I guess I'm not quite understanding?
[20:06] <enyc> Eickmeyer: I'm looking for pdf-viewer (and, preferably image-viewer)  that can be set as default viewer   *AND*  use a *different* default-printer  to the system-wide default-printer
[20:07] <enyc> Eickmeyer: i.e. i'm trying to fudge things so "most" printing (and screenshotting) is usually to dated PDF files [by setting cups-pdf as default printer], and its' only when you open pdfs and images  the default-behaviour is to "actually print to real printer"
[20:08] <Eickmeyer> enyc: There's a few options. What have you found when searching? We have evince, okular, and others readily available in the repositories.
[20:09] <enyc> Eickmeyer: i've used many many different pdf viewers;  what I'm asking for some careful-input from somebody more knowledgeable about the ecosystem as a whole is   "is what im asking sensible/achievable"  and  is "different default printer for different programs"   achievable in some GTK / library / etc  area somewhere in the chain of command?  etc
[20:11] <enyc> I can certainly "just go experiment" with a whole LOAD of programs,  but I'm asking a slightly subtle question and  interested if somebody suggest a different way of going about this.
[20:12] <enyc> I'm fairly sure I can reconfigure  both cinnamon-screenshooter and cups-pdf  to do what i want in terms of autodating  stuff sent to them; thats' not the problem part.
[20:12] <Eickmeyer> Ok, yeah, you're not likely to find that in this chat. The people in #openprinting *might* be able to point you in the right direction, though.
[20:13] <enyc> Eickmeyer: what can you tell me generally about shared-libraries etc for dialogs for "printing" in gtk, gnome, other toolkits  generally  ?
[20:13] <Eickmeyer> I honestly can't. I'm not a GTK programmer.
[20:13] <enyc> are those shared-dialogcs for "opne fgile"  "print something"  etc in other libraries
[20:13] <enyc> ok no problem =)
[20:13] <enyc> thankyou for answer
[20:13] <Eickmeyer> Yw. #openprinting handles cups stuff and they also work closely with the Ubuntu Desktop people who know a lot about GTK.
[20:18] <enyc> Eickmeyer: given no overlap of nicks between them I've actually asked both #cups and @openprinting  politely
[20:18] <enyc> Eickmeyer: thankyou
[20:19] <Eickmeyer> enyc: #cups doesn't *really* handle what you'd think is cups that is used in Linux anymore. #openprinting handles that. #cups is what is used on macOS pretty much exclusively.
[20:19] <enyc> Eickmeyer: also some of these channels are now primare on OFTC last i checked
[20:20] <enyc> Eickmeyer: anyway, asked a bit, amy look forther later.  Thankyou for pointers!
[20:20] <Eickmeyer> enyc: You're welcome. I got my info from https://openprinting.github.io/contact/ and am friends with the head of OpenPrinting.