Re: key stroke in 4gl

>Date: Fri, 15 Aug 1997 11:06:26 -0500 >From: Chengteh Lee <acustaf!clee@acustaf.acustaf.com> >X-Informix-List-Id: <list.15979> > >Hi: > >I am very new in Informix 4GL, so I need help. >The key strokes, such as F1, F2... keys in our GUI >are working properly. However, when we installed it in other >systems, it can not work. >Should I look into the termcap settings in the informix 4gl, and >how? Thanks! Yes, you'll need to look into it. There are several things you'll have to do. (1) You need to know the character codes generated by each of the function keys. One relatively simple way to do that is to run 'od -c' and then hit each function key in turn, separating each function key with a return. When you're done, type ^D (or your EOF character) and you get output such as: $ od -c ^[[224z ^[[225z ^[[226z 0000000 033 [ 2 2 4 z \\n 033 [ 2 2 5 z \\n 033 [ ^[[227z ^[[228z 0000020 2 2 6 z \\n 033 [ 2 2 7 z \\n 033 [ 2 2 ^[[229z ^[[230z 0000040 8 z \\n 033 [ 2 2 9 z \\n 033 [ 2 3 0 z ^[[231z ^[[232z ^[[233z0000060 \\n 033 [ 2 3 1 z \\n 033 [ 2 3 2 z \\n 033 ^[[234z ^[[235z 0000100 [ 2 3 3 z \\n 033 [ 2 3 4 z \\n 033 [ 2 0000120 3 5 z \\n 0000124 $ This was for keys F1..F12 on a Sun... The 033 is an escape (\\E in termcap), the \\n is the return. The leading 0000000 etc is an octal offset into the 'file' that is being typed. So the F1 key emits '\\E[224z'. (2) You need to determine which termcap entry you are going to use. This will probably be the same name as you currently use for $TERM, but it might not be. You also need to establish which TERMCAP file you are going to use. (3) You then inspect the entry in the termcap file, along with the appendix in the I4GL manuals on termcap, etc. You determine that I4GL's F1 key corresponds to the k0 termcap entry (I think that's correct; I've not checked recently), and you ensure that the keystrokes in the entry match those generated by the function key, fixing it if not. I'd normally make a local file which contained just the relevant termcap entry, and set TERMCAP=`pwd`/termcap to simplify testing without breaking anybody else's terminal. (4) You test the revised termcap file on your I4GL applications. When it is all working, you can decide how to get the termcap entry installed for everyone who needs it. Yours, Jonathan Leffler (johnl@informix.com) #include <disclaimer.h> PS: Warning I do not reply to messages with anti-spam in the return path.