[DayLateDon]

Hello ...

Problem 1: Unicode

I'm trying to install a number of Unicode characters (specified by their hexadecimal codes) into a field. In some cases, there's a long, long, *long* delay between the actual installation and the final "display", and Project Builder announces:

ATSFontLoadUnicodeCharacterSet failed: error -982

The hangup seems to occur when the my method runs across the occasional apparently-missing glyph. (The result is displayed as an "L" in a box in "Helvetica Neue".) A similar delay occurs when I try to scroll a text view with previously-obscured characters; again, it seems that displaying the characters is the problem.

How do I combat this problem?


Problem 2: NSTextField

I have a single-line, left-justified, editable-and-selectable, scrollable NSTextField, right off of the Interface Builder palette. As expected, if I type a long stream of characters into it to the point of going past the right-hand-edge, the string scrolls leftward so that the new characters are still visible. However, I can't get this behavior when I append characters programmatically. Have I simply overlooked a "scrollRangeToVisible" variant (it wouldn't be the first time, but I've think I've looked just about everywhere and tried just about everything), or do I have to fuss with the window's field editor or a custom NSText object?


Thanks and regards,

DayLateDon

[lindberg]

Originally posted by DayLateDon:
<STRONG>Problem 1: Unicode

I'm trying to install a number of Unicode characters (specified by their hexadecimal codes) into a field. In some cases, there's a long, long, *long* delay between the actual installation and the final "display", and Project Builder announces:

ATSFontLoadUnicodeCharacterSet failed: error -982

The hangup seems to occur when the my method runs across the occasional apparently-missing glyph. (The result is displayed as an "L" in a box in "Helvetica Neue".) A similar delay occurs when I try to scroll a text view with previously-obscured characters; again, it seems that displaying the characters is the problem.

How do I combat this problem?
</STRONG>

Ick. Provide a font that has the glyphs? Make sure the character is a valid Unicode value ([NSCharacterSet illegalCharacterSet] and/or [NSCharacterSet nonBaseCharacterSet])?

I suppose you could break in the debugger or examine the running app with Sampler to see what's going on during the delay. However, some fonts just take a while to load...

<STRONG>Problem 2: NSTextField

I have a single-line, left-justified, editable-and-selectable, scrollable NSTextField, right off of the Interface Builder palette. As expected, if I type a long stream of characters into it to the point of going past the right-hand-edge, the string scrolls leftward so that the new characters are still visible. However, I can't get this behavior when I append characters programmatically. Have I simply overlooked a "scrollRangeToVisible" variant (it wouldn't be the first time, but I've think I've looked just about everywhere and tried just about everything), or do I have to fuss with the window's field editor or a custom NSText object?
</STRONG>

If the user is not editing the textfield at the time, there is no way to change the characters being shown -- you *do* have it set as left-justified. You can right-justify it maybe, though editable right-justified textfields have some weirdnesses IIRC. Or you could write a subclass of NSTextFieldCell to do the display a bit differently I suppose.

If the user is editing the field at the moment, then get the window's fieldEditor, and append the string to that and use scrollRangeToVisible.
It *should* work, though I don't know if I've ever tried something like that.