garrett at paraboliclogic.com
Fri Mar 31 01:30:15 EST 2006
Ken Ray wrote:
>> Is there a way to find out which scrollbar sent the message?
> Well, you could store the current hScroll and vScroll values in a custom
> property, and then when you get the scrollbarDrag message, compare the
> hScroll and vScoll against the stored values. Whichever one changed is the
> culprit. Then just make sure to set your custom properties to the new values
> so you can check the next time...
> I'm curious, though - why would you need to know which sent the message?
In my endeavor to make a routine for syntax highlighting for a HTML
document in a field, I've tried various ideas. Initially I was scanning
the entire document each time a change was made in the field, and this
proved to be a very bad idea. I was also scanning the entire document
when loading the html file, great for small files, but a very noticeable
delay when trying to load a very large html file.
I have come up with what I think is a good routine for checking when a
change is made in the field, so that's taken care of, but I had an idea
earlier today about when loading the html file into the editor.
Instead of scanning the entire document on loading it, I want to scan
only the text that is just below the view of the user. So as the user
scrolls, I want to scan a few lines below the users view. This way it
doesn't take a lot of time scanning and highlighting the entire document
on initial loading, it only takes a microsecond to scan just below the
view of the user. I have no problem coming up with the code to actually
do this, but when I found out that I could not tell which scroll bar was
at work, I couldn't move on.
I'll give your suggestion a try. Looks like Richard Gaskin has an idea
also for this. So maybe between your suggestion and his I might be able
to accomplish this :-)
Thanks a bunch,
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