Re: [LINUX5250] x5250 version 0.4.2, caret erase problem

[James Rich <james@xxxxxxxxxxx>]

On Sat, 23 Oct 2004, Scott Klement wrote:

> a) I still have problems with the location of the X5250 file.  The program
> still looks for it in the wrong directory, and does not install it.  I
> have to fix this manually each time.

I don't have an install rule for the X5250 resource file yet.  I also need 
to create a ./configure option to instruct x5250 on where to look for it. 
I thought /etc/X11/app-defaults was standard.  I appear to be mistaken :(

> b) Although the flickering problem seems to have been solved, there now
> appears to be a problem with the caret.  It does not seem to get erased
> when you hit an AID generating key.
>
> For example, in SEU type 'I' on the left to insert a new line, and hit
> enter.  Then immediately hit enter again.  The previous caret is never
> erased...

Yes, I noticed this problem soon after the release :(  I stayed up most of 
the night trying to come up with an elegant solution.  I didn't find one, 
but this morning I thought of something that should work.  The problem is 
that after pressing an AID key x5250_terminal_update() is called 
repeatedly instead of only once.  The caret is redrawn with every call, 
but is only erased after a key is pressed.  So after pressing the AID key 
the caret does get erased, but then gets immediately redrawn by the call 
the x5250_terminal_update().  At the time of this redraw the caret 
position has not been updated yet so it is drawn in the same place we just 
erased it from.  Later x5250_terminal_update() is called again this time 
with the correct position.  But too late, we already drew it at least once 
incorrectly with no keystrokes in between.

So now it appears I need to track the last caret position myself and 
forcibly erase it with each call to x5250_terminal_update().  This will 
cause more drawing requests to be sent to the X server but I don't think 
it can be helped.

Look for a new release very soon...

James Rich

It's not the software that's free; it's you.
        - billyskank on Groklaw