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Document symbol fonts hack (text from Georg Baum).

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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17368 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Abdelrazak Younes 2007-02-26 16:22:54 +00:00
parent b242a84807
commit a7d8653a46
2 changed files with 15 additions and 0 deletions
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4
src/frontends/qt4/GuiFontMetrics.C
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@ -93,6 +93,10 @@ int GuiFontMetrics::width(docstring const & s) const
}
if (smallcaps_shape_)
// Caution: The following ucs4 to QString conversions work
// for symbol fonts only because they are no real conversions
// but simple casts in reality. See comment in QLPainter::text()
// for more explanation.
return smallcapsWidth(toqstr(s));
int w = 0;

11
src/frontends/qt4/QLPainter.C
View File

@ -207,6 +207,17 @@ int QLPainter::smallCapsText(int x, int y,
int QLPainter::text(int x, int y, docstring const & s,
LyXFont const & f)
{
/* Caution: The following ucs4 to QString conversions work for symbol fonts
only because they are no real conversions but simple casts in reality.
When we want to draw a symbol or calculate the metrics we pass the position
of the symbol in the font (as given in lib/symbols) as a char_type to the
frontend. This is just wrong, because the symbol is no UCS4 character at
all. You can think of this number as the code point of the symbol in a
custom symbol encoding. It works because this char_type is lateron again
interpreted as a position in the font again.
The correct solution would be to have extra functions for symbols, but that
would require to duplicate a lot of frontend and mathed support code.
*/
QString str = toqstr(s);
#if 0