src/gtk1/font.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/font.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling and Julian Smart
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // ============================================================================
  11 // declarations
  12 // ============================================================================
  13
  14 // ----------------------------------------------------------------------------
  15 // headers
  16 // ----------------------------------------------------------------------------
  17
  18 // For compilers that support precompilation, includes "wx.h".
  19 #include "wx/wxprec.h"
  20
  21 #include "wx/font.h"
  22
  23 #ifndef WX_PRECOMP
  24     #include "wx/log.h"
  25     #include "wx/settings.h"
  26     #include "wx/cmndata.h"
  27 #endif
  28
  29 #include "wx/fontutil.h"
  30 #include "wx/utils.h"
  31 #include "wx/gdicmn.h"
  32 #include "wx/tokenzr.h"
  33
  34 #include <strings.h>
  35
  36 #include "wx/gtk1/private.h"
  37 #include <gdk/gdkprivate.h>
  38
  39 // ----------------------------------------------------------------------------
  40 // constants
  41 // ----------------------------------------------------------------------------
  42
  43 // the default size (in points) for the fonts
  44 static const int wxDEFAULT_FONT_SIZE = 12;
  45
  46 // ----------------------------------------------------------------------------
  47 // wxScaledFontList: maps the font sizes to the GDK fonts for the given font
  48 // ----------------------------------------------------------------------------
  49
  50 WX_DECLARE_HASH_MAP(int, GdkFont *, wxIntegerHash, wxIntegerEqual,
  51                     wxScaledFontList);
  52
  53 // ----------------------------------------------------------------------------
  54 // wxFontRefData
  55 // ----------------------------------------------------------------------------
  56
  57 class wxFontRefData : public wxObjectRefData
  58 {
  59 public:
  60     // from broken down font parameters, also default ctor
  61     wxFontRefData(int size = -1,
  62                   int family = wxFONTFAMILY_DEFAULT,
  63                   int style = wxFONTSTYLE_NORMAL,
  64                   int weight = wxFONTWEIGHT_NORMAL,
  65                   bool underlined = false,
  66                   const wxString& faceName = wxEmptyString,
  67                   wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
  68
  69     // from XFLD
  70     wxFontRefData(const wxString& fontname);
  71
  72     // copy ctor
  73     wxFontRefData( const wxFontRefData& data );
  74
  75     virtual ~wxFontRefData();
  76
  77     // do we have the native font info?
  78     bool HasNativeFont() const
  79     {
  80         // only use m_nativeFontInfo if it had been initialized
  81         return !m_nativeFontInfo.IsDefault();
  82     }
  83
  84     // setters: all of them also take care to modify m_nativeFontInfo if we
  85     // have it so as to not lose the information not carried by our fields
  86     void SetPointSize(int pointSize);
  87     void SetFamily(int family);
  88     void SetStyle(int style);
  89     void SetWeight(int weight);
  90     void SetUnderlined(bool underlined);
  91     void SetFaceName(const wxString& facename);
  92     void SetEncoding(wxFontEncoding encoding);
  93
  94     void SetNoAntiAliasing( bool no = true ) { m_noAA = no; }
  95     bool GetNoAntiAliasing() const { return m_noAA; }
  96
  97     // and this one also modifies all the other font data fields
  98     void SetNativeFontInfo(const wxNativeFontInfo& info);
  99
 100     // debugger helper: shows what the font really is
 101     //
 102     // VZ: I need this as my gdb either shows wildly wrong values or crashes
 103     //     when I ask it to "p fontRefData" :-(
 104 #if defined(__WXDEBUG__)
 105     void Dump() const
 106     {
 107         wxPrintf(_T("%s-%s-%s-%d-%d\n"),
 108                  m_faceName.c_str(),
 109                  m_weight == wxFONTWEIGHT_NORMAL
 110                     ? _T("normal")
 111                     : m_weight == wxFONTWEIGHT_BOLD
 112                         ? _T("bold")
 113                         : _T("light"),
 114                  m_style == wxFONTSTYLE_NORMAL ? _T("regular") : _T("italic"),
 115                  m_pointSize,
 116                  m_encoding);
 117     }
 118 #endif // Debug
 119
 120 protected:
 121     // common part of all ctors
 122     void Init(int pointSize,
 123               int family,
 124               int style,
 125               int weight,
 126               bool underlined,
 127               const wxString& faceName,
 128               wxFontEncoding encoding);
 129
 130     // set all fields from (already initialized and valid) m_nativeFontInfo
 131     void InitFromNative();
 132
 133 private:
 134     // clear m_scaled_xfonts if any
 135     void ClearGdkFonts();
 136
 137     // the map of font sizes to "GdkFont *"
 138     wxScaledFontList  m_scaled_xfonts;
 139
 140     int             m_pointSize;
 141     int             m_family,
 142                     m_style,
 143                     m_weight;
 144     bool            m_underlined;
 145     wxString        m_faceName;
 146     wxFontEncoding  m_encoding;  // Unused under GTK 2.0
 147     bool            m_noAA;      // No anti-aliasing
 148
 149     // The native font info, basicly an XFLD under GTK 1.2 and
 150     // the pango font description under GTK 2.0.
 151     wxNativeFontInfo m_nativeFontInfo;
 152
 153     friend class wxFont;
 154 };
 155
 156 // ----------------------------------------------------------------------------
 157 // wxFontRefData
 158 // ----------------------------------------------------------------------------
 159
 160 void wxFontRefData::Init(int pointSize,
 161                          int family,
 162                          int style,
 163                          int weight,
 164                          bool underlined,
 165                          const wxString& faceName,
 166                          wxFontEncoding encoding)
 167 {
 168     m_family = family == wxFONTFAMILY_DEFAULT ? wxFONTFAMILY_SWISS : family;
 169
 170     m_faceName = faceName;
 171
 172     // we accept both wxDEFAULT and wxNORMAL here - should we?
 173     m_style = style == wxDEFAULT ? wxFONTSTYLE_NORMAL : style;
 174     m_weight = weight == wxDEFAULT ? wxFONTWEIGHT_NORMAL : weight;
 175
 176     // and here, do we really want to forbid creation of the font of the size
 177     // 90 (the value of wxDEFAULT)??
 178     m_pointSize = pointSize == wxDEFAULT || pointSize == -1
 179                     ? wxDEFAULT_FONT_SIZE
 180                     : pointSize;
 181
 182     m_underlined = underlined;
 183     m_encoding = encoding;
 184
 185     m_noAA = false;
 186 }
 187
 188 void wxFontRefData::InitFromNative()
 189 {
 190     m_noAA = false;
 191
 192     // get the font parameters from the XLFD
 193     // -------------------------------------
 194
 195     m_faceName = m_nativeFontInfo.GetXFontComponent(wxXLFD_FAMILY);
 196
 197     m_weight = wxFONTWEIGHT_NORMAL;
 198
 199     wxString w = m_nativeFontInfo.GetXFontComponent(wxXLFD_WEIGHT).Upper();
 200     if ( !w.empty() && w != _T('*') )
 201     {
 202         // the test below catches all of BOLD, EXTRABOLD, DEMIBOLD, ULTRABOLD
 203         // and BLACK
 204         if ( ((w[0u] == _T('B') && (!wxStrcmp(w.c_str() + 1, wxT("OLD")) ||
 205                                    !wxStrcmp(w.c_str() + 1, wxT("LACK"))))) ||
 206              wxStrstr(w.c_str() + 1, _T("BOLD")) )
 207         {
 208             m_weight = wxFONTWEIGHT_BOLD;
 209         }
 210         else if ( w == _T("LIGHT") || w == _T("THIN") )
 211         {
 212             m_weight = wxFONTWEIGHT_LIGHT;
 213         }
 214     }
 215
 216     switch ( wxToupper(*m_nativeFontInfo.
 217                             GetXFontComponent(wxXLFD_SLANT).c_str()) )
 218     {
 219         case _T('I'):   // italique
 220             m_style = wxFONTSTYLE_ITALIC;
 221             break;
 222
 223         case _T('O'):   // oblique
 224             m_style = wxFONTSTYLE_SLANT;
 225             break;
 226
 227         default:
 228             m_style = wxFONTSTYLE_NORMAL;
 229     }
 230
 231     long ptSize;
 232     if ( m_nativeFontInfo.GetXFontComponent(wxXLFD_POINTSIZE).ToLong(&ptSize) )
 233     {
 234         // size in XLFD is in 10 point units
 235         m_pointSize = (int)(ptSize / 10);
 236     }
 237     else
 238     {
 239         m_pointSize = wxDEFAULT_FONT_SIZE;
 240     }
 241
 242     // examine the spacing: if the font is monospaced, assume wxTELETYPE
 243     // family for compatibility with the old code which used it instead of
 244     // IsFixedWidth()
 245     if ( m_nativeFontInfo.GetXFontComponent(wxXLFD_SPACING).Upper() == _T('M') )
 246     {
 247         m_family = wxFONTFAMILY_TELETYPE;
 248     }
 249     else // not monospaceed
 250     {
 251         // don't even try guessing it, it doesn't work for too many fonts
 252         // anyhow
 253         m_family = wxFONTFAMILY_UNKNOWN;
 254     }
 255
 256     // X fonts are never underlined...
 257     m_underlined = false;
 258
 259     // deal with font encoding
 260     wxString
 261         registry = m_nativeFontInfo.GetXFontComponent(wxXLFD_REGISTRY).Upper(),
 262         encoding = m_nativeFontInfo.GetXFontComponent(wxXLFD_ENCODING).Upper();
 263
 264     if ( registry == _T("ISO8859") )
 265     {
 266         int cp;
 267         if ( wxSscanf(encoding, wxT("%d"), &cp) == 1 )
 268         {
 269             m_encoding = (wxFontEncoding)(wxFONTENCODING_ISO8859_1 + cp - 1);
 270         }
 271     }
 272     else if ( registry == _T("MICROSOFT") )
 273     {
 274         int cp;
 275         if ( wxSscanf(encoding, wxT("cp125%d"), &cp) == 1 )
 276         {
 277             m_encoding = (wxFontEncoding)(wxFONTENCODING_CP1250 + cp);
 278         }
 279     }
 280     else if ( registry == _T("KOI8") )
 281     {
 282         m_encoding = wxFONTENCODING_KOI8;
 283     }
 284     else // unknown encoding
 285     {
 286         // may be give a warning here? or use wxFontMapper?
 287         m_encoding = wxFONTENCODING_SYSTEM;
 288     }
 289 }
 290
 291 wxFontRefData::wxFontRefData( const wxFontRefData& data )
 292              : wxObjectRefData()
 293 {
 294     m_pointSize = data.m_pointSize;
 295     m_family = data.m_family;
 296     m_style = data.m_style;
 297     m_weight = data.m_weight;
 298
 299     m_underlined = data.m_underlined;
 300
 301     m_faceName = data.m_faceName;
 302     m_encoding = data.m_encoding;
 303
 304     m_noAA = data.m_noAA;
 305
 306     // Forces a copy of the internal data.  wxNativeFontInfo should probably
 307     // have a copy ctor and assignment operator to fix this properly but that
 308     // would break binary compatibility...
 309     m_nativeFontInfo.FromString(data.m_nativeFontInfo.ToString());
 310 }
 311
 312 wxFontRefData::wxFontRefData(int size, int family, int style,
 313                              int weight, bool underlined,
 314                              const wxString& faceName,
 315                              wxFontEncoding encoding)
 316 {
 317     Init(size, family, style, weight, underlined, faceName, encoding);
 318 }
 319
 320 wxFontRefData::wxFontRefData(const wxString& fontname)
 321 {
 322     // FromString() should really work in GTK1 too, doesn't it?
 323     m_nativeFontInfo.SetXFontName(fontname);
 324
 325     InitFromNative();
 326 }
 327
 328 void wxFontRefData::ClearGdkFonts()
 329 {
 330     for ( wxScaledFontList::iterator i = m_scaled_xfonts.begin();
 331           i != m_scaled_xfonts.end();
 332           ++i )
 333     {
 334         GdkFont *font = i->second;
 335         gdk_font_unref( font );
 336     }
 337
 338     m_scaled_xfonts.clear();
 339 }
 340
 341 wxFontRefData::~wxFontRefData()
 342 {
 343     ClearGdkFonts();
 344 }
 345
 346 // ----------------------------------------------------------------------------
 347 // wxFontRefData SetXXX()
 348 // ----------------------------------------------------------------------------
 349
 350 void wxFontRefData::SetPointSize(int pointSize)
 351 {
 352     m_pointSize = pointSize;
 353
 354     if ( HasNativeFont() )
 355     {
 356         wxString size;
 357         if ( pointSize == -1 )
 358             size = _T('*');
 359         else
 360             size.Printf(_T("%d"), 10*pointSize);
 361
 362         m_nativeFontInfo.SetXFontComponent(wxXLFD_POINTSIZE, size);
 363     }
 364 }
 365
 366 void wxFontRefData::SetFamily(int family)
 367 {
 368     m_family = family;
 369
 370     // TODO: what are we supposed to do with m_nativeFontInfo here?
 371 }
 372
 373 void wxFontRefData::SetStyle(int style)
 374 {
 375     m_style = style;
 376
 377     if ( HasNativeFont() )
 378     {
 379         wxString slant;
 380         switch ( style )
 381         {
 382             case wxFONTSTYLE_ITALIC:
 383                 slant = _T('i');
 384                 break;
 385
 386             case wxFONTSTYLE_SLANT:
 387                 slant = _T('o');
 388                 break;
 389
 390             default:
 391                 wxFAIL_MSG( _T("unknown font style") );
 392                 // fall through
 393
 394             case wxFONTSTYLE_NORMAL:
 395                 slant = _T('r');
 396         }
 397
 398         m_nativeFontInfo.SetXFontComponent(wxXLFD_SLANT, slant);
 399     }
 400 }
 401
 402 void wxFontRefData::SetWeight(int weight)
 403 {
 404     m_weight = weight;
 405
 406     if ( HasNativeFont() )
 407     {
 408         wxString boldness;
 409         switch ( weight )
 410         {
 411             case wxFONTWEIGHT_BOLD:
 412                 boldness = _T("bold");
 413                 break;
 414
 415             case wxFONTWEIGHT_LIGHT:
 416                 boldness = _T("light");
 417                 break;
 418
 419             default:
 420                 wxFAIL_MSG( _T("unknown font weight") );
 421                 // fall through
 422
 423             case wxFONTWEIGHT_NORMAL:
 424                 // unspecified
 425                 boldness = _T("medium");
 426         }
 427
 428         m_nativeFontInfo.SetXFontComponent(wxXLFD_WEIGHT, boldness);
 429     }
 430 }
 431
 432 void wxFontRefData::SetUnderlined(bool underlined)
 433 {
 434     m_underlined = underlined;
 435
 436     // the XLFD doesn't have "underlined" field anyhow
 437 }
 438
 439 void wxFontRefData::SetFaceName(const wxString& facename)
 440 {
 441     m_faceName = facename;
 442
 443     if ( HasNativeFont() )
 444     {
 445         m_nativeFontInfo.SetXFontComponent(wxXLFD_FAMILY, facename);
 446     }
 447 }
 448
 449 void wxFontRefData::SetEncoding(wxFontEncoding encoding)
 450 {
 451     m_encoding = encoding;
 452
 453     if ( HasNativeFont() )
 454     {
 455         wxNativeEncodingInfo info;
 456         if ( wxGetNativeFontEncoding(encoding, &info) )
 457         {
 458             m_nativeFontInfo.SetXFontComponent(wxXLFD_REGISTRY, info.xregistry);
 459             m_nativeFontInfo.SetXFontComponent(wxXLFD_ENCODING, info.xencoding);
 460         }
 461     }
 462 }
 463
 464 void wxFontRefData::SetNativeFontInfo(const wxNativeFontInfo& info)
 465 {
 466     // previously cached fonts shouldn't be used
 467     ClearGdkFonts();
 468
 469     m_nativeFontInfo = info;
 470
 471     // set all the other font parameters from the native font info
 472     InitFromNative();
 473 }
 474
 475 // ----------------------------------------------------------------------------
 476 // wxFont creation
 477 // ----------------------------------------------------------------------------
 478
 479 IMPLEMENT_DYNAMIC_CLASS(wxFont, wxGDIObject)
 480
 481 wxFont::wxFont(const wxNativeFontInfo& info)
 482 {
 483     (void) Create(info.GetXFontName());
 484 }
 485
 486 bool wxFont::Create( int pointSize,
 487                      int family,
 488                      int style,
 489                      int weight,
 490                      bool underlined,
 491                      const wxString& face,
 492                      wxFontEncoding encoding)
 493 {
 494     UnRef();
 495
 496     m_refData = new wxFontRefData(pointSize, family, style, weight,
 497                                   underlined, face, encoding);
 498
 499     return true;
 500 }
 501
 502 bool wxFont::Create(const wxString& fontname)
 503 {
 504     // VZ: does this really happen?
 505     if ( fontname.empty() )
 506     {
 507         *this = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
 508
 509         return true;
 510     }
 511
 512     m_refData = new wxFontRefData(fontname);
 513
 514     return true;
 515 }
 516
 517 void wxFont::Unshare()
 518 {
 519     if (!m_refData)
 520     {
 521         m_refData = new wxFontRefData();
 522     }
 523     else
 524     {
 525         wxFontRefData* ref = new wxFontRefData(*(wxFontRefData*)m_refData);
 526         UnRef();
 527         m_refData = ref;
 528     }
 529 }
 530
 531 wxFont::~wxFont()
 532 {
 533 }
 534
 535 // ----------------------------------------------------------------------------
 536 // accessors
 537 // ----------------------------------------------------------------------------
 538
 539 int wxFont::GetPointSize() const
 540 {
 541     wxCHECK_MSG( Ok(), 0, wxT("invalid font") );
 542
 543 #if wxUSE_PANGO
 544     return M_FONTDATA->HasNativeFont() ? M_FONTDATA->m_nativeFontInfo.GetPointSize()
 545                                        : M_FONTDATA->m_pointSize;
 546 #else
 547     return M_FONTDATA->m_pointSize;
 548 #endif
 549 }
 550
 551 wxString wxFont::GetFaceName() const
 552 {
 553     wxCHECK_MSG( Ok(), wxEmptyString, wxT("invalid font") );
 554
 555 #if wxUSE_PANGO
 556     return M_FONTDATA->HasNativeFont() ? M_FONTDATA->m_nativeFontInfo.GetFaceName()
 557                                        : M_FONTDATA->m_faceName;
 558 #else
 559     return M_FONTDATA->m_faceName;
 560 #endif
 561 }
 562
 563 int wxFont::GetFamily() const
 564 {
 565     wxCHECK_MSG( Ok(), 0, wxT("invalid font") );
 566
 567 #if wxUSE_PANGO
 568     int ret = M_FONTDATA->m_family;
 569     if (M_FONTDATA->HasNativeFont())
 570         // wxNativeFontInfo::GetFamily is expensive, must not call more than once
 571         ret = M_FONTDATA->m_nativeFontInfo.GetFamily();
 572
 573     if (ret == wxFONTFAMILY_DEFAULT)
 574         ret = M_FONTDATA->m_family;
 575
 576     return ret;
 577 #else
 578     return M_FONTDATA->m_family;
 579 #endif
 580 }
 581
 582 int wxFont::GetStyle() const
 583 {
 584     wxCHECK_MSG( Ok(), 0, wxT("invalid font") );
 585
 586 #if wxUSE_PANGO
 587     return M_FONTDATA->HasNativeFont() ? M_FONTDATA->m_nativeFontInfo.GetStyle()
 588                                        : M_FONTDATA->m_style;
 589 #else
 590     return M_FONTDATA->m_style;
 591 #endif
 592 }
 593
 594 int wxFont::GetWeight() const
 595 {
 596     wxCHECK_MSG( Ok(), 0, wxT("invalid font") );
 597
 598 #if wxUSE_PANGO
 599     return M_FONTDATA->HasNativeFont() ? M_FONTDATA->m_nativeFontInfo.GetWeight()
 600                                        : M_FONTDATA->m_weight;
 601 #else
 602     return M_FONTDATA->m_weight;
 603 #endif
 604 }
 605
 606 bool wxFont::GetUnderlined() const
 607 {
 608     wxCHECK_MSG( Ok(), false, wxT("invalid font") );
 609
 610     return M_FONTDATA->m_underlined;
 611 }
 612
 613 wxFontEncoding wxFont::GetEncoding() const
 614 {
 615     wxCHECK_MSG( Ok(), wxFONTENCODING_DEFAULT, wxT("invalid font") );
 616
 617     // m_encoding is unused in wxGTK2, return encoding that the user set.
 618     return M_FONTDATA->m_encoding;
 619 }
 620
 621 bool wxFont::GetNoAntiAliasing() const
 622 {
 623     wxCHECK_MSG( Ok(), wxFONTENCODING_DEFAULT, wxT("invalid font") );
 624
 625     return M_FONTDATA->m_noAA;
 626 }
 627
 628 const wxNativeFontInfo *wxFont::GetNativeFontInfo() const
 629 {
 630     wxCHECK_MSG( Ok(), (wxNativeFontInfo *)NULL, wxT("invalid font") );
 631
 632     if ( !M_FONTDATA->HasNativeFont() )
 633     {
 634         // NB: this call has important side-effect: it not only finds
 635         //     GdkFont representation, it also initializes m_nativeFontInfo
 636         //     by calling its SetXFontName method
 637         GetInternalFont();
 638     }
 639
 640     return &(M_FONTDATA->m_nativeFontInfo);
 641 }
 642
 643 bool wxFont::IsFixedWidth() const
 644 {
 645     wxCHECK_MSG( Ok(), false, wxT("invalid font") );
 646
 647     if ( M_FONTDATA->HasNativeFont() )
 648     {
 649         // the monospace fonts are supposed to have "M" in the spacing field
 650         wxString spacing = M_FONTDATA->
 651                             m_nativeFontInfo.GetXFontComponent(wxXLFD_SPACING);
 652
 653         return spacing.Upper() == _T('M');
 654     }
 655
 656     return wxFontBase::IsFixedWidth();
 657 }
 658
 659 // ----------------------------------------------------------------------------
 660 // change font attributes
 661 // ----------------------------------------------------------------------------
 662
 663 void wxFont::SetPointSize(int pointSize)
 664 {
 665     Unshare();
 666
 667     M_FONTDATA->SetPointSize(pointSize);
 668 }
 669
 670 void wxFont::SetFamily(int family)
 671 {
 672     Unshare();
 673
 674     M_FONTDATA->SetFamily(family);
 675 }
 676
 677 void wxFont::SetStyle(int style)
 678 {
 679     Unshare();
 680
 681     M_FONTDATA->SetStyle(style);
 682 }
 683
 684 void wxFont::SetWeight(int weight)
 685 {
 686     Unshare();
 687
 688     M_FONTDATA->SetWeight(weight);
 689 }
 690
 691 void wxFont::SetFaceName(const wxString& faceName)
 692 {
 693     Unshare();
 694
 695     M_FONTDATA->SetFaceName(faceName);
 696 }
 697
 698 void wxFont::SetUnderlined(bool underlined)
 699 {
 700     Unshare();
 701
 702     M_FONTDATA->SetUnderlined(underlined);
 703 }
 704
 705 void wxFont::SetEncoding(wxFontEncoding encoding)
 706 {
 707     Unshare();
 708
 709     M_FONTDATA->SetEncoding(encoding);
 710 }
 711
 712 void wxFont::DoSetNativeFontInfo( const wxNativeFontInfo& info )
 713 {
 714     Unshare();
 715
 716     M_FONTDATA->SetNativeFontInfo( info );
 717 }
 718
 719 void wxFont::SetNoAntiAliasing( bool no )
 720 {
 721     Unshare();
 722
 723     M_FONTDATA->SetNoAntiAliasing( no );
 724 }
 725
 726 // ----------------------------------------------------------------------------
 727 // get internal representation of font
 728 // ----------------------------------------------------------------------------
 729
 730 static GdkFont *g_systemDefaultGuiFont = (GdkFont*) NULL;
 731
 732 // this is also used from tbargtk.cpp and tooltip.cpp, hence extern
 733 extern GdkFont *GtkGetDefaultGuiFont()
 734 {
 735     if (!g_systemDefaultGuiFont)
 736     {
 737         GtkWidget *widget = gtk_button_new();
 738         GtkStyle *def = gtk_rc_get_style( widget );
 739         if (def)
 740         {
 741             g_systemDefaultGuiFont = gdk_font_ref( def->font );
 742         }
 743         else
 744         {
 745             def = gtk_widget_get_default_style();
 746             if (def)
 747                 g_systemDefaultGuiFont = gdk_font_ref( def->font );
 748         }
 749         gtk_widget_destroy( widget );
 750     }
 751     else
 752     {
 753         // already have it, but ref it once more before returning
 754         gdk_font_ref(g_systemDefaultGuiFont);
 755     }
 756
 757     return g_systemDefaultGuiFont;
 758 }
 759
 760 GdkFont *wxFont::GetInternalFont( float scale ) const
 761 {
 762     GdkFont *font = (GdkFont *) NULL;
 763
 764     wxCHECK_MSG( Ok(), font, wxT("invalid font") );
 765
 766     long int_scale = long(scale * 100.0 + 0.5); // key for fontlist
 767     int point_scale = (int)((M_FONTDATA->m_pointSize * 10 * int_scale) / 100);
 768
 769     wxScaledFontList& list = M_FONTDATA->m_scaled_xfonts;
 770     wxScaledFontList::iterator i = list.find(int_scale);
 771     if ( i != list.end() )
 772     {
 773         font = i->second;
 774     }
 775     else // we don't have this font in this size yet
 776     {
 777         if (*this == wxSystemSettings::GetFont( wxSYS_DEFAULT_GUI_FONT))
 778         {
 779             font = GtkGetDefaultGuiFont();
 780         }
 781
 782         if ( !font )
 783         {
 784             // do we have the XLFD?
 785             if ( int_scale == 100 && M_FONTDATA->HasNativeFont() )
 786             {
 787                 font = wxLoadFont(M_FONTDATA->m_nativeFontInfo.GetXFontName());
 788             }
 789
 790             // no XLFD of no exact match - try the approximate one now
 791             if ( !font )
 792             {
 793                 wxString xfontname;
 794                 font = wxLoadQueryNearestFont( point_scale,
 795                                                M_FONTDATA->m_family,
 796                                                M_FONTDATA->m_style,
 797                                                M_FONTDATA->m_weight,
 798                                                M_FONTDATA->m_underlined,
 799                                                M_FONTDATA->m_faceName,
 800                                                M_FONTDATA->m_encoding,
 801                                                &xfontname);
 802                 // NB: wxFont::GetNativeFontInfo relies on this
 803                 //     side-effect of GetInternalFont
 804                 if ( int_scale == 100 )
 805                     M_FONTDATA->m_nativeFontInfo.SetXFontName(xfontname);
 806             }
 807         }
 808
 809         if ( font )
 810         {
 811             list[int_scale] = font;
 812         }
 813     }
 814
 815     // it's quite useless to make it a wxCHECK because we're going to crash
 816     // anyhow...
 817     wxASSERT_MSG( font, wxT("could not load any font?") );
 818
 819     return font;
 820 }