Drawstring

General
#1 
g.DRAWSTRING someLongString , xPos , yPos, Width, false

This is supposed to draw the string and create a new line when it hits certain characters (such as a space) if the next section won’t fit on the same line

However, I cannot find a list of what those characters actually are.
a SPACE of course makes sense, as any other “whitespace” [tab, linefeed]
but I’ve seen it break between two “%%” where there was MORE than enough space for the 2nd “%”

I have a need to be able to analyze a string, and determine where/how DrawSTring would handle it, to store that information to create a specical command file.

The LR is not too verbose on this command

#2

This is strange…
After doing some experimenting with a string that exceeded the specifed width

WWWWxWWWW

I replaced “x” with all the punctuation to see the results (and yes the width still exceeded the line in each case]
and this is what I found

  • \+$% would all break the line just before one of these characters
  • ?/|-! space would always break the line just AFTER one of these characters

yet comma and period had no effect at all

is there ANYWHERE this is documented?

#3

My guess is this is being handled by the operating system text layout engine and not Xojo.

It is probably the Unicode Line Breaking Algorithm…

http://unicode.org/reports/tr14/

#4

This looks like the typographic line breaking rules. In typography, comma and period must be followed by a thin space. That would explain why the line wrapping does not take place in these cases when there is no thin space.

#5

After reading the link Kevin posted, and some experimenting I got a piece of code working to do exactly what I needed…

Thanks

#6