Setting line height exactly - fails for certain unicode chars
Setting line height exactly - fails for certain unicode chars
- Subject: Setting line height exactly - fails for certain unicode chars
- From: "B.A. Winckler" <email@hidden>
- Date: Mon, 2 Jul 2007 21:50:02 +0200
Hi,
I am trying to have a text view with one fixed pitch font and such
that each line has a fixed height. The way I try to accomplish this
is by setting the min and max line height (using NSParagraphStyle) on
all characters in the text storage, but I am running into problems.
The problem is that certain unicode characters will cause font
substitution and some non-Monaco font is used to display certain
glyphs and these are higher than the Monaco glyphs so that some lines
will end up higher than others.
I have managed to replicate this in TextEdit (on Mac OS X Ver.
10.4.10, PowerPC) by creating a file containing the following three
lines:
b
b#
b
The hash (#) on the second line should not the usual one but the one
with unicode number 9839 (a stylized hash). Then I go to "Format ->
Text -> Spacing..." and set "Line height" to "Exactly 22.0 pt" and
the font should be Monaco. (I have attached a similar file to this
email.)
For me the above three lines will be displayed with the first and
second of equal height whereas the middle one will be slightly higher
than the other two. It seems the middle line has more space under it.
This leads to the questions:
1. Is it even possible to "force" a line height like I am trying to
do, or does setMaximumLineHeight / setMinimumLineHeight simply give
the text system a hint as to which line height to use?
2. Assuming it is possible to accomplish what I am trying to do, can
somebody please enlighten me as to how it should be done?
Thanks,
B. Winckler
{\rtf1\mac\ansicpg10000\cocoartf824\cocoasubrtf410
{\fonttbl\f0\fnil\fcharset77 Monaco;\f1\fnil\fcharset78 HiraKakuPro-W3;}
{\colortbl;\red255\green255\blue255;}
\paperw11900\paperh16840\margl1440\margr1440\vieww9360\viewh8400\viewkind0
\pard\tx566\tx1133\tx1700\tx2267\tx2834\tx3401\tx3968\tx4535\tx5102\tx5669\tx6236\tx6803\sl-440\ql\qnatural\pardirnatural
\f0\fs24 \cf0 b\
b\
b
\f1 \'81\'f2
\f0 \
b\
}_______________________________________________
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