lyx_mirror/src/ColorHandler.h

// -*- C++ -*-
/* This file is part of
 * ======================================================
 *
 *           LyX, The Document Processor
 *
 *	    Copyright 1995-2001 The LyX Team
 *
 * ======================================================*/

#ifndef COLOR_HANDLER_H
#define COLOR_HANDLER_H

#ifdef __GNUG__
#pragma interface
#endif

#include <boost/smart_ptr.hpp>

// This is only included to provide stuff for the non-public sections
#include <X11/Xlib.h>

#include "PainterBase.h"

class LyXFont;

/**
 * This is a factory class that can produce GCs with a specific
 * color. It will cache GCs for performance.
 */
class LyXColorHandler {
public:
	///
	LyXColorHandler();
	///
	~LyXColorHandler();
	///
	unsigned long colorPixel(LColor::color c);
	///
	GC getGCForeground(LColor::color c);
	///
	GC getGCLinepars(PainterBase::line_style,
			 PainterBase::line_width, LColor::color c);
	/// update the cache after a color definition change
	void updateColor(LColor::color c);

private:
	///
	Display * display;
	///
	Colormap colormap;
	///
	GC colorGCcache[LColor::ignore + 1];
	///
	typedef std::map<int, GC> LineGCCache;
	///
	LineGCCache lineGCcache;
	///
	Pixmap drawable;
};

///
extern boost::scoped_ptr<LyXColorHandler> lyxColorHandler;

#endif