The computation of length on screen depend in particular of the computation of the size of an em. Many places of the code used to rely on the width of the M character, which is not really correct:
http://en.wikipedia.org/wiki/Em_%28typography%29
In digital typography, the best value to use is the point size of the font.
* Implement FontMetrics::em(), which returns the value in pixels of the EM unit.
Convert code to use it.
* Introduce Length::inPixel(MetricsBase const &), which takes the textwidth and em information from the MetricsBase object. Convert code to use it.
* Fix several places where Length::inPixel is used without a proper em value.
* add mathed_font_em() helper function. It should eventually be removed like some other functions in MathSupport.
* Add dummy implementation of FontMetrics to tex2lyx for linking purposes.
* InsetBox and GuiBox: Use proper empty length instead of the broken -9.99col% trick
* some slight changes to the logic of GuiBox to make sure that values are set as needed.
* lengthToWidget(): handle properly the empty length case. All the other related Qt helpers did it already, it was probably an oversight. Also set the default_unit parameter as optional (not needed in this patch actually, but I got carried away :)
* allow generating LaTeX code for an empty length, since some broken code does that.
- This preference was used for specifying the papersize to xdvi, dvipdfm,
dvips. However, I can't seem to see any effect on the result.
- The papersize should instead be defined in the document settings.
- The global papersize default was misused to also change the tex
output by specifying the papersize as if it was specified in the
document settings. This caused the same lyx document to be outputted
differently on different pcs.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@40028 a592a061-630c-0410-9148-cb99ea01b6c8
imperial units in only one place (instead of thousands of slightly different
copies). Functionally equivalent.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@28380 a592a061-630c-0410-9148-cb99ea01b6c8
hope there are only conforming implementaions out there ;-}
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@21312 a592a061-630c-0410-9148-cb99ea01b6c8
* Font::FontBits -> FontInfo
* Font::FONT_XXX -> all enums transfered to FontEnums.h and renamed to FontXxx
I've replaced Font uses with FontInfo were the language() member was not needed, basically all draw() and metrics methods. There's one problematic cases with InsetQuotes which I solved by taking the Buffer main language.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@21240 a592a061-630c-0410-9148-cb99ea01b6c8
