Automatic scrolling of a text view

[Brad_Bumgarner]

I have a window, with a single NSTextView object that I am filling with text. I would like to have the view automatically start scrolling down when the text no longer fits within the text view object. According to the reference, the “scroll” command is not supported by Applescript Studio 1.2. I have tried the example that the reference supplied, but it doesn’t work.

Any help will be greatly appreciated,
Brad Bumgarner, CTA

[jonn8]

I use this routine to create a log in a text view with autoscroll :

on update_text(the_object, the_string, append_string)
–the_object should be something like: text view 1 of scroll view “log” of window “main”
–the_string is the text to add to the text view
–append_string is a boolean flag to either add the text or clear before adding
log “updating text”
tell the_object
if append_string = false then
set contents to the_string
else
set old_text to contents & return
set contents to old_text & the_string
set all_text to contents
set the_length to (length of all_text)
call method “scrollRangeToVisible:” of object it with parameter {the_length, the_length}
end if
end tell
end update_text

–this script was automatically tagged for
–color coded syntax by Script to Markup Code

Jon

[Brad_Bumgarner]

I had discovered the call method, unfortunately I had not used it within a tell statement, therefore the object was not defined. Once I fixed that, it worked just as advertised.

Thanks,
Brad Bumgarner, CTA

[fortepianissimo]

I use this routine to create a log in a text view with autoscroll :

on update_text(the_object, the_string, append_string)
–the_object should be something like: text view 1 of scroll view “log” of window “main”
–the_string is the text to add to the text view
–append_string is a boolean flag to either add the text or clear before adding
log “updating text”
tell the_object
if append_string = false then
set contents to the_string
else
set old_text to contents & return
set contents to old_text & the_string
set all_text to contents
set the_length to (length of all_text)
call method “scrollRangeToVisible:” of object it with parameter {the_length, the_length}
end if
end tell
end update_text

–this script was automatically tagged for
–color coded syntax by Script to Markup Code

Jon

I’m trying something that’s a little bit different - I want to scroll to some character, not just the bottom or the top of the text. In my experiment I use this character position to fill both of the parameters (so it’s "… with parameter {pos,pos}), but it didn’t scoll at all. When change pos to the full length of the text, it did scroll down to the bottom!

So what should I do to get the desired effect? Thanks!

[fortepianissimo]

I use this routine to create a log in a text view with autoscroll :

on update_text(the_object, the_string, append_string)
–the_object should be something like: text view 1 of scroll view “log” of window “main”
–the_string is the text to add to the text view
–append_string is a boolean flag to either add the text or clear before adding
log “updating text”
tell the_object
if append_string = false then
set contents to the_string
else
set old_text to contents & return
set contents to old_text & the_string
set all_text to contents
set the_length to (length of all_text)
call method “scrollRangeToVisible:” of object it with parameter {the_length, the_length}
end if
end tell
end update_text

–this script was automatically tagged for
–color coded syntax by Script to Markup Code

Jon

I’m trying something that’s a little bit different - I want to scroll to some character, not just the bottom or the top of the text. In my experiment I use this character position to fill both of the parameters (so it’s "… with parameter {pos,pos}), but it didn’t scoll at all. When change pos to the full length of the text, it did scroll down to the bottom!

So what should I do to get the desired effect? Thanks!

So does anyone know how to scroll to arbitrary position instead of just the beginning or the end? Thanks a lot!

[Brad_Bumgarner]

You need to determine where that character is within the text and supply that position to the method. I haven’t ever tried (or needed) to do this, so I don’t really know the best way to find the position of a given character. Not a LOT of help, I know. :rolleyes:

Brad Bumgarner, CTA

[fortepianissimo]

You need to determine where that character is within the text and supply that position to the method. I haven’t ever tried (or needed) to do this, so I don’t really know the best way to find the position of a given character. Not a LOT of help, I know. :rolleyes:

Brad Bumgarner, CTA

Thanks Brad - the problem is, even when I give it the index of the character (inside the contents of the text view) it doesn’t scroll at all, unless the index is either 0 or the end of the contents. Does this sound like a bug, or I’m missing something…?