[reportlab-users] split string by width.

[Tim Roberts]

Juan Efren Castillo wrote:

> I need to print a single long string.

>

> reportlab.lib.utils.SimpleSplit works splitting by blank spaces, but

> this string has no spaces

>

> My solution was to divide string into "chunks"

>

> y  = 0

> for t in chunks(r, MAXCHARS):

>     p.drawString(d.x, page_size[1] - d.y + y, t)

>     y -= p._leading

>

>

> How ever I don't like this solution because MAXCHARS is always

> different depending on Font and Size of the text.

>

> Any ideas how to calculate MAXCHARS ? or another solution to this?


The only solution is to do it by hand, checking one character at a time
until the string is too long:  I assume "p" is your canvas and "r" has
the incoming string.  I might choose different variable names...

    # Assume maxWidth has the maximum width.
    tmpstr = ""
    for c in r:
        if p.stringWidth(s+c) > maxWidth:
            p.drawString(d.x, page_size[1] - d.y + y, tmpstr)
            y -= p._leading
            tmpstr = ""
        tmpstr+= c
    if tmpstr:
        p.drawString(d.x, page_size[1] - d.y + y, tmpstr)
        y -= p._leading

-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.