include/wx/fontenum.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        fontenum.h
   3 // Purpose:     wxFontEnumerator class for getting available fonts
   4 // Author:      Julian Smart, Vadim Zeitlin
   5 // Modified by: extended to enumerate more than just font facenames and works
   6 //              not only on Windows now (VZ)
   7 // Created:     04/01/98
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) Julian Smart, Vadim Zeitlin
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 #ifndef _WX_FONTENUM_H_
  14 #define _WX_FONTENUM_H_
  15
  16 #if defined(__GNUG__) && !defined(__APPLE__)
  17     #pragma interface "fontenum.h"
  18 #endif
  19
  20 #include "wx/fontenc.h"
  21
  22 // ----------------------------------------------------------------------------
  23 // wxFontEnumerator enumerates all available fonts on the system or only the
  24 // fonts with given attributes
  25 // ----------------------------------------------------------------------------
  26
  27 class WXDLLEXPORT wxFontEnumerator
  28 {
  29 public:
  30     wxFontEnumerator() : m_Facenames(NULL), m_Encodings(NULL) { }
  31
  32     // start enumerating font facenames (either all of them or those which
  33     // support the given encoding) - will result in OnFacename() being
  34     // called for each available facename (until they are exhausted or
  35     // OnFacename returns FALSE)
  36     virtual bool EnumerateFacenames
  37                  (
  38                     wxFontEncoding encoding = wxFONTENCODING_SYSTEM, // all
  39                     bool fixedWidthOnly = FALSE
  40                  );
  41
  42     // enumerate the different encodings either for given font facename or for
  43     // all facenames - will result in OnFontEncoding() being called for each
  44     // available (facename, encoding) couple
  45     virtual bool EnumerateEncodings(const wxString& facename = wxT(""));
  46
  47     // callbacks which are called after one of EnumerateXXX() functions from
  48     // above is invoked - all of them may return FALSE to stop enumeration or
  49     // TRUE to continue with it
  50
  51     // called by EnumerateFacenames
  52     virtual bool OnFacename(const wxString& facename)
  53         {
  54             if (m_Facenames == NULL) m_Facenames = new wxArrayString;
  55             m_Facenames -> Add(facename);
  56             return TRUE;
  57         }
  58
  59     // called by EnumerateEncodings
  60     virtual bool OnFontEncoding(const wxString& WXUNUSED(facename),
  61                                 const wxString& encoding)
  62         {
  63             if (m_Encodings == NULL) m_Encodings = new wxArrayString;
  64             m_Encodings -> Add(encoding);
  65             return TRUE;
  66         }
  67
  68     // convenience function that returns array of facenames. Cannot be called
  69     // before EnumerateFacenames.
  70     wxArrayString *GetFacenames()
  71         { return m_Facenames; }
  72
  73     // convenience function that returns array of encodings.
  74     // Cannot be called before EnumerateEncodings.
  75     wxArrayString *GetEncodings()
  76         { return m_Encodings; }
  77
  78     // virtual dtor for the base class
  79     virtual ~wxFontEnumerator()
  80         {
  81             if (m_Facenames) delete m_Facenames;
  82             if (m_Encodings) delete m_Encodings;
  83         }
  84
  85 private:
  86     wxArrayString *m_Facenames, *m_Encodings;
  87
  88     DECLARE_NO_COPY_CLASS(wxFontEnumerator)
  89 };
  90
  91 #endif // _WX_FONTENUM_H_