xerox 19770722 Additional Hints about PNRs free download

File name 19770722_Additional_Hints_about_PNRs.pdf

XEROX INFORMATION PRODUCTS GROUP Systems Development Division July 22. 1977 XEROX SDD ARCHIVES To: Tools Group I have read and understood Pages _________ To _________ From: Bruce Parsley. SD/PARe Reviewer Date Subject: Additional Hints about PNRs '----- , of Pages _ _ Ref. "ttl <;, DD ~ 281<, Stored: PNRsHints.memo Here are some "hints" for tool writers concerning Processing Notification Routines (PNRs). The material in this memo will be incorporated into the next release of the TEX spec. You should read the material in that spec in section 5.2 (from about half way down page 6 to the end of the section on page 7). This memo assumes a familiarity with that material (and with some of the material in the Tool User Interface (TUI) and Windows specs). A tool writer should do something like the following: Somewhere in your tool, write one or more PNRs. They are normal Mesa procedures (subroutines) that must have calling sequences as specified by CursorPnrType or PbkPnrType. Now create a SubwindowObject. The routine CreateWindow makes one subwindow besides the window. The routines CreateSubwindow and EnlinkSubwindow may be used to get more subwindows in a window. You must create a PNRsObject. This may be done by declaring a (global) variable of that type or by using AllocateHeapNode. Then you should associate a PNRsObject with each of your subwindows. The way to do this is something like the following: mySubwindow.pnrs +- @myPNRs; Now you should fill each of the fields of each of your PNRsObjects. The encouraged method is to call one or more of the TVI routines that set up their .' own PNRs in your subwindows' PNRsObjects. In Release 3.0 of the Tools