uifont.h

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#ifndef uifont_h
#define uifont_h

/*+
________________________________________________________________________

 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        A.H. Lammertink
 Date:          22/05/2000
 RCS:           $Id$
________________________________________________________________________

-*/
#include "uibasemod.h"
#include "fontdata.h"
#include "uistring.h"

class uiFont;
class uiParent;
class BufferStringSet;
class Settings;
mFDQtclass(QFont)
mFDQtclass(QFontMetrics)


mGlobal(uiBase) bool selectFont(uiFont&,uiParent* =0,
                        const uiString& title=uiString::emptyString());
mGlobal(uiBase) bool selectFont(FontData&,uiParent* =0,
                        const uiString& title = uiString::emptyString());
mExpClass(uiBase) uiFont : public CallBacker
{
friend class    uiFontList;

public:
    virtual             ~uiFont();

    uiFont&             operator=(const uiFont&);

    FontData            fontData() const ;
    void                setFontData(const FontData&);
    static void         setFontData(mQtclass(QFont)&,const FontData&);
    static void         getFontData(FontData&,const mQtclass(QFont)&);
    static mQtclass(QFont)* createQFont(const FontData&);

    inline const mQtclass(QFont&)       qFont() const { return *qfont_; }

    int                 height() const;
    int                 leading() const;
    int                 maxWidth() const;
    int                 avgWidth() const;
    int                 width(const uiString&) const;
    int                 ascent() const;
    int                 descent() const;

    const char*         key() const             { return key_; }
    Notifier<uiFont>    changed;

protected:
                        uiFont(const char* ky, const char* family,
                                int ps=FontData::defaultPointSize(),
                                FontData::Weight w=FontData::defaultWeight(),
                                bool it=FontData::defaultItalic());
                        uiFont(const char* ky,FontData fd=FontData());
                        uiFont(const uiFont&);

    // don't change order of these attributes!
    mQtclass(QFont*)            qfont_;
    mQtclass(QFontMetrics&)     qfontmetrics_;

    BufferString                key_;

    void                        updateMetrics();
};


mExpClass(uiBase) uiFontList : public CallBacker
{
friend class    uiFontSettingsGroup;

public:

                        uiFontList() : inited_(false)       {}
                        ~uiFontList();
    static uiFontList&  getInst();

    int                 nrKeys();
    const char*         key(int);
    void                listKeys(BufferStringSet&);

    const ObjectSet<uiFont>&    fonts() const   { return fonts_; }
    ObjectSet<uiFont>&  fonts()                 { return fonts_; }

    uiFont&             get(const char* ky=0);
    uiFont&             get(FontData::StdSz);
    uiFont&             getFromQfnt(mQtclass(QFont*));

    uiFont&             add(const char* ky,const FontData&);
    uiFont&             add(const char* ky,
                            const char* f=FontData::defaultFamily(),
                            int ptsz=FontData::defaultPointSize(),
                            FontData::Weight w=FontData::defaultWeight(),
                            bool it=FontData::defaultItalic());

    void                update(Settings&);

protected:

    ObjectSet<uiFont>   fonts_;
    void                initialise();
    uiFont&             gtFont(const char*,const FontData* =0,
                               const mQtclass(QFont*) =0 );

    void                use(const Settings&);

private:

    bool                inited_;

    void                addOldGuess(const IOPar&,const char*);
    void                removeOldEntries(Settings&);
    void                setDefaults();

};

#define FontList    uiFontList::getInst

#endif