Thanks Willie, I understand fully now!!!!
Willie Alberty wrote:
>
> On Nov 14, 2006, at 7:11 AM, Brent Robinson wrote:
>
>> I am having some issues with generating a script to align
>> characters to the right on the framework pdf component.
>>
>> I am trying to extract the glyph width but am getting very large
>> widths like 333 for L and 556 for E. This is very high or I am not
>> sure what I am supposed to work that number against.
>
> Glyph widths are typically normalized to a 1000 unit-per-em box,
> which is independent of the font size. For the font you're using, the
> L takes up a third of the total width of the widest character in the
> font; the E about half. You were on the right track with your sample
> code, but were just missing a couple of steps.
>
>> Is there any way of aligning right or an easier way of gaining the
>> width of a text for a specific font?
>
> There should be an easier way, and I'm working on one now (trying to
> find time amongst the other projects I've got going). A future layout
> class will allow you to specify text alignment as a paragraph
> attribute and it will handle all of the messy details. It will also
> take care of things like line wrapping, multiple fonts and sizes,
> etc. I've got a paying project that will be using these classes, but
> it's not on the schedule to be complete until January.
>
> In the meantime, here is a function you can use that will return the
> width in points for a given string, font, and size:
>
> /**
> * Returns the total width in points of the string using the specified
> font and
> * size.
> *
> * This is not the most efficient way to perform this calculation. I'm
> * concentrating optimization efforts on the upcoming layout manager
> class.
> * Similar calculations exist inside the layout manager class, but
> widths are
> * generally calculated only after determining line fragments.
> *
> * @param string $string
> * @param Zend_Pdf_Resource_Font $font
> * @param float $fontSize Font size in points
> * @return float
> */
> function widthForStringUsingFontSize($string, $font, $fontSize)
> {
> $drawingString = iconv('', 'UTF-16BE', $string);
> $characters = array();
> for ($i = 0; $i < strlen($drawingString); $i++) {
> $characters[] = (ord($drawingString[$i++]) << 8) | ord
> ($drawingString[$i]);
> }
> $glyphs = $font->cmap->glyphNumbersForCharacters($characters);
> $widths = $font->widthsForGlyphs($glyphs);
> $stringWidth = (array_sum($widths) / $font->getUnitsPerEm()) *
> $fontSize;
> return $stringWidth;
> }
>
> $font = Zend_Pdf_FontFactory::fontWithName
> (Zend_Pdf_Const::FONT_HELVETICA);
> $stringWidth = widthForStringUsingFontSize('Hello world!', $font, 12);
>
>
> You can then use the width of the string to calculate your $x
> coordinate for center or right alignment.
>
> --
>
> Willie Alberty, Owner
> Spenlen Media
> [EMAIL PROTECTED]
>
> http://www.spenlen.com/
>
>
>
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