Blast from the Past: SDI and MDI

This is an entry I wrote on March 20, 2006 touching upon SDI and MDI:

Warning: This is a usability and interface topic. You may quietly exit through the back doors. No hard feelings. Otherwise...

I know that Adobe Acrobat 7 has been out for quite a while now, but I figure that I need to get the word out wherever I can. The following is a problem that's been bothering me since Acrobat 6.

Notice this. Earlier versions of Adobe Acrobat used a multiple document interface (MDI), where all documents resided within a single parent window. The problem was that they forgot to add "tabs" for easy navigation between the documents in this multiple document interface.

I wrote a complaint in the official forums a while back, and in version 7, it seems that they finally tried to solve the problem by switching to a single document interface (SDI), where each document has its own window on the Windows Taskbar. But the Adobe Acrobat team forgot something again. If you exit any given document with the Microsoft Windows [X] button (the red one in Windows XP), every single document closes. The expected behavior, based on other applications written for Windows, is that only that one document should close (not all of them).

Or perhaps the Acrobat team has a good explanation for this behavior? (I certainly can't think of one.)

My original entry: http://gordeonbleu.livejournal.com/20578.html