peterk@cbmger.UUCP (Peter Kittel GERMANY) (07/13/90)
A little citation of the well-reputated german magazine c't in an introduction article to programming of OS/2 Presentation Manager: "PM tells the application to restore it's window contents after this is viewable again. ... This solution is reasonable. The effort to restore windows automatically by the PM itself would be much too big on a multitasking system with several tasks running in parallel." Remember the flags you may set when Opening an Amiga Intuition window? On the Amiga, you can *CHOOSE* that Intuition does this job for you. But you are not forced to do it this way, you also may do it yourself. I think that's what is normally called flexibility. And that's provided by an operating system only needing a small fraction of memory compared to PM. Another issue of flexibility: Under Amiga OS, you can have several screens with different resolutions and color palettes simultaneously. I'm not quite sure, but I fear that under PM you only have one screen and every application has to share it. To those who know about it: What happens if an application needs a different video mode or a different palette? Is there a way under PM (please not by hacking and bypassing PM) to switch to another display page? And if your video adaptor provides only one, is the contents of the PM desktop saved and restored when switching back to another task? -- Best regards, Dr. Peter Kittel // E-Mail to Commodore Frankfurt, Germany \X/ rutgers!cbmvax!cbmger!peterk
seanc@pro-party.cts.com (Sean Cunningham) (07/15/90)
In-Reply-To: message from peterk@cbmger.UUCP Speaking about having several screens, that's something that's always amazed me...the way you can drag down several screens, each with their own resolution, overscan, and palette. Sean //////////////////////////////////////////////////////////////////////////// UUCP: ...!crash!pnet01!pro-party!seanc | ARPA: !crash!pnet01!pro-party!seanc@nosc.mil | " Fanatics have their INET: seanc@pro-party.cts.com | dreams, wherewith they | weave a paradise for RealWorld: Sean Cunningham | a sect. " Voice: (512) 994-1602 PLINK: ce3k* | -Keats | Call C.B.A.U.G. BBS (512) 883-8351 w/SkyPix | B^) VISION GRAPHICS B^) \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
panon@cheddar.ucs.ubc.ca (Paul-Andre Panon) (07/20/90)
In article <282@cbmger.UUCP> peterk@cbmger.UUCP (Peter Kittel GERMANY) writes: > >Is there a way under PM (please not by hacking and bypassing PM) to switch >to another display page? And if your video adaptor provides only one, >is the contents of the PM desktop saved and restored when switching >back to another task? >-- >Best regards, Dr. Peter Kittel // E-Mail to >Commodore Frankfurt, Germany \X/ rutgers!cbmvax!cbmger!peterk I remember reading a long time ago that OS/2 had something called screen groups where more than one program could be running on a particular screen. Due to the fact that this runs in protected mode, I am sure the OS saves the screen (although it might have to swap to disk to accomplish this) when you switch from one screen group to another. Screens would of course not be draggable, only flippable. I have not seen this in action and so should not comment on preformance issues (but I don't think it would be too swift unless you had a 386 DX). -- panon@staff.ucs.ubc.ca or USERPAP1@UBCMTSG or ppanon@undergrad.cs.ubc.ca or USERPAP1@mtsg.ubc.ca Looking for a .signature? "We've already got one. It is ver-ry ni-sce!"