lyx_mirror/src/frontends/qt2/qfont_loader.h
Angus Leeming 1fcedd4b63 Strip trailing whitespace.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@6249 a592a061-630c-0410-9148-cb99ea01b6c8
2003-02-25 13:35:26 +00:00

76 lines
1.5 KiB
C++

// -*- C++ -*-
/**
* \file qfont_loader.h
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author John Levon
*
* Full author contact details are available in file CREDITS
*/
#ifndef QFONTLOADER_H
#define QFONTLOADER_H
#include <map>
#include "encoding.h"
#include "lyxfont.h"
#include <qfont.h>
#include <qfontmetrics.h>
/**
* Qt font loader for LyX. Matches LyXFonts against
* actual QFont instances, and also caches metrics.
*/
class qfont_loader {
public:
qfont_loader();
~qfont_loader();
/// update fonts after zoom, dpi, font names, or norm change
void update();
/// do we have anything matching?
bool available(LyXFont const & f);
/// get the QFont for this LyXFont
QFont const & get(LyXFont const & f);
/// get the QFont metrics for this LyXFont
QFontMetrics const & metrics(LyXFont const & f) {
return getfontinfo(f)->metrics;
}
/// return pixel width for the given unicode char
int charwidth(LyXFont const & f, Uchar val);
private:
/// hold info about a particular font
struct font_info {
font_info(LyXFont const & f);
/// the font instance
QFont font;
/// metrics on the font
QFontMetrics metrics;
typedef std::map<Uchar, int> WidthCache;
/// cache of char widths
WidthCache widthcache;
};
/// get font info (font + metrics) for the given LyX font. Does not fail.
font_info * getfontinfo(LyXFont const & f);
/// BUTT ugly !
font_info * fontinfo_[LyXFont::NUM_FAMILIES][2][4][10];
};
extern qfont_loader fontloader;
#endif // QFONT_LOADER_H