🚀 go-pugleaf

In article <2B48F420.8547@ics.uci.edu>, shi@ics.uci.edu (Edmond C. Shi) writes:
> ...just started to work with turbovision about a month ago
>    and ran into some questions i was hoping somebody could help
>    out on.
> 
>      1)  when i run the tvision demo programs and access the
>          help menu, i get an "assertion" error after closing
>          the window.  it seems like the program is deleting
>          an object when it shouldn't -- specifically, it seems
>          to be occurring when deleting the help topic object?
>          any body have an idea how i might resolve this problem
>          since i am using some of it for my own code.
>      2)  using the scrolling bar, is there a way i can modify it
>          so that the window scrolls when the cursor is on the
>          bottom line rather than the top line?
> 
> thanks,
>      ed

the first problem is a known memory leak in tvision versions below 1.03-
i believe borlandc has a patch for it- i may have it- if you have bc 3.1
the problem should be fixed- if you want the patch, i can try to mail it
to you directly- send me mail- 

for the second problem- i'm going to give a crack at answering- i know that
conceptually i am right because this is what you do for all tv modifications-
the specifics i'm pretty sure of -

what you want to do is create a class tMyScrollbar(or whatever) public 
tScrollBar;

then override it's event handler (i'll give you pseudocode because i don't
know the specifics of scrollbar)

tMyScrollBar::handleEvent(TEvent& event)
{
if position==1 and event.message.keydown==thedownarrowkey then scroll down 1;
//consult tkeys.h in /tvision/include for the down arrow key, also, check
out /tvision/source/tscrolle.cpp - this will give you the event handler 
and the functions which actually do the scrolling, and the function which
gives you the position

if you're unfamiliar with the event handler let me know and i'll give a 
more detailed explanation- 

this should be enough to get you started- if not, let me know-  
C
hope this helps.


kevin
A
C
then override it's event handl