[reportlab-users] Problems with tables containing Para flowables

[Dirk Holtwick]

Hi,

I experienced problems using Para() elements (recent SVN version) within
Platypus Tables. The tables always consumed more space than available.
Therfore I wrote a little patch that overrides the calculations done by
the Reportlab Table Class. It adds a "totalWidth" attribute to the Table
object and calculates entries width "*" and None the way they consume
the available space.

Hope this may be usefull. Code follows.

Yours Dirk

---

class PmlTable(Table):

    def _normWidth(self, w, maxw):
        " Helper for calculating percentages "
        if type(w)==type(""):
            w = ((maxw/100.0) * float(w[:-1]))
        elif (w is None) or (w=="*"):
            w = maxw
        return min(w, maxw)

    def wrap(self, availWidth, availHeight):

        # Prepare values
        totalWidth = self._normWidth(self.totalWidth, availWidth)
        remainingWidth = totalWidth
        remainingCols = 0
        newColWidths = self._colWidths

        # Calculate widths that are fix
        # IMPORTANT!!! We can not substitute the private value
        # self._colWidths therefore we have to modify list in place
        for i in range(len(newColWidths)):
            colWidth = newColWidths[i]
            if (colWidth is not None) or (colWidth=='*'):
                colWidth = self._normWidth(colWidth, totalWidth)
                remainingWidth -= colWidth
            else:
                remainingCols += 1
                colWidth = None
            newColWidths[i] = (colWidth)

        # Distribute remaining space
        if remainingCols:
            for i in range(len(newColWidths)):
                if newColWidths[i] is None:
                    newColWidths[i] = (remainingWidth / remainingCols)

        # print "New values:", totalWidth, newColWidths, sum(newColWidths)

        # Call original method "wrap()"
        # self._colWidths = newColWidths
        return Table.wrap(self, availWidth, availHeight)

t = PmlTable(...)
t.totalWidth = _width(tdata.width)



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Dirk Holtwick
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