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Topic: Adjusting annotation & text string position & widt
Conf: (P-PDF) Developers, Msg: 32401
From: aandi
Date: 1/9/2002 12:10 AM

>Sorry, I am not following this too well
>?
>You are refering to the old and new font
>width above,
>right ?

I assume that only one font is involved, that you are replacing the text "Pattern" with some other text in the same font.

So, you need a table containing the width of each character in that font, either at a standard sized or scaled to the size you are showing the font at.

You then can calculate the width of the string. I think you are looking for shortcuts. There are none; it is up to you to calculate everything about where the text is placed.

Once you have worked out the width, you can set the text's start position.


I should probably add a comment at this point, because I can answer your questions but ultimately I do not believe it will help you. Your approach is a common mistake. In my view it is completely wrong. The problem only seems to be simple; it is actually extremely complex, and you have not yet looked into the issue of fixing the PDF file which you will damage by changing the length of the stream.

Frankly, forget all idea of changing an existing PDF in this way. Instead look either at the idea of doing this task with PDF forms, or generate the COMPLETE PDF file from your program using a suitable programming tool.