c++ - Making DrawText break a string -

so can make drawtext break string if string has spaces, or if put in \r\n @ end of string. however, long string has no spaces or line breaks in continues past drawing rectangle , gets clipped. prevent this, if possible.

nothing in format flags drawtext stood out me make happen. ideas?

what normally use dt_wordbreak flag. drawtext documentation on msdn, this:

breaks words. lines automatically broken between words if word extend past edge of rectangle specified lprect parameter. carriage return-line feed sequence breaks line.

if not specified, output on 1 line.

however, have single unbreakable line - is, there no words. you need after breaks yourself. can solve 2 ways:

• use drawtext dt_calcrect calculate size of rectangle - loop, shortening string, until you've found string first line, repeat remaining string. is, find subset index 0-n fits horizontally in width of drawing area; find string n+1-m fits horizontally again; repeat until hit end of string. concatenate these substrings \r\n between each force manual break, draw drawtext , wrap correctly.

• use drawtextex , pass in pointer drawtextparams structure. has uilengthdrawn member "the number of characters processed drawtextex, including white-space characters. number can length of string or index of first line falls below drawing area." should not pass in dt_noclip. (without testing it) work give same information first method without looping: key bit makes me uncertain phrase "below" drawing area, , if line unbreakable may think processed entire text.

the first method work , simple version of use own rich text processing.