src/msw/font.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        font.cpp
   3 // Purpose:     wxFont class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "font.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include <stdio.h>
  25 #include "wx/setup.h"
  26 #include "wx/list.h"
  27 #include "wx/utils.h"
  28 #include "wx/app.h"
  29 #include "wx/font.h"
  30 #endif
  31
  32 #include "wx/msw/private.h"
  33 #include <assert.h>
  34
  35 #if !USE_SHARED_LIBRARIES
  36 IMPLEMENT_DYNAMIC_CLASS(wxFont, wxGDIObject)
  37
  38 #if wxUSE_PORTABLE_FONTS_IN_MSW
  39 IMPLEMENT_DYNAMIC_CLASS(wxFontNameDirectory, wxObject)
  40 #endif
  41
  42 #endif
  43
  44 wxFontRefData::wxFontRefData(void)
  45 {
  46         m_style = 0;
  47         m_temporary = FALSE;
  48         m_pointSize = 0;
  49         m_family = 0;
  50         m_fontId = 0;
  51         m_style = 0;
  52         m_weight = 0;
  53         m_underlined = 0;
  54         m_faceName = "";
  55         m_hFont = 0;
  56 }
  57
  58 wxFontRefData::wxFontRefData(const wxFontRefData& data)
  59 {
  60         m_style = data.m_style;
  61         m_temporary = FALSE;
  62         m_pointSize = data.m_pointSize;
  63         m_family = data.m_family;
  64         m_fontId = data.m_fontId;
  65         m_style = data.m_style;
  66         m_weight = data.m_weight;
  67         m_underlined = data.m_underlined;
  68         m_faceName = data.m_faceName;
  69         m_hFont = 0;
  70 }
  71
  72 wxFontRefData::~wxFontRefData(void)
  73 {
  74         if ( m_hFont )
  75         ::DeleteObject((HFONT) m_hFont);
  76 }
  77
  78 wxFont::wxFont(void)
  79 {
  80     if ( wxTheFontList )
  81         wxTheFontList->Append(this);
  82 }
  83
  84 /* Constructor for a font. Note that the real construction is done
  85  * in wxDC::SetFont, when information is available about scaling etc.
  86  */
  87 wxFont::wxFont(int pointSize, int family, int style, int weight, bool underlined, const wxString& faceName)
  88 {
  89     Create(pointSize, family, style, weight, underlined, faceName);
  90
  91     if ( wxTheFontList )
  92         wxTheFontList->Append(this);
  93 }
  94
  95 bool wxFont::Create(int pointSize, int family, int style, int weight, bool underlined, const wxString& faceName)
  96 {
  97   UnRef();
  98   m_refData = new wxFontRefData;
  99
 100   M_FONTDATA->m_family = family;
 101   M_FONTDATA->m_style = style;
 102   M_FONTDATA->m_weight = weight;
 103   M_FONTDATA->m_pointSize = pointSize;
 104   M_FONTDATA->m_underlined = underlined;
 105   M_FONTDATA->m_faceName = faceName;
 106
 107   RealizeResource();
 108
 109   return TRUE;
 110 }
 111
 112 wxFont::~wxFont()
 113 {
 114   if (wxTheFontList)
 115     wxTheFontList->DeleteObject(this);
 116 }
 117
 118 bool wxFont::RealizeResource(void)
 119 {
 120   if (M_FONTDATA && !M_FONTDATA->m_hFont)
 121   {
 122     BYTE ff_italic;
 123     int ff_weight = 0;
 124     int ff_family = 0;
 125     wxString ff_face("");
 126
 127     switch (M_FONTDATA->m_family)
 128     {
 129       case wxSCRIPT:     ff_family = FF_SCRIPT ;
 130                          ff_face = "Script" ;
 131                          break ;
 132       case wxDECORATIVE: ff_family = FF_DECORATIVE;
 133                          break;
 134       case wxROMAN:      ff_family = FF_ROMAN;
 135                          ff_face = "Times New Roman" ;
 136                          break;
 137       case wxTELETYPE:
 138       case wxMODERN:     ff_family = FF_MODERN;
 139                          ff_face = "Courier New" ;
 140                          break;
 141       case wxSWISS:      ff_family = FF_SWISS;
 142                          ff_face = "Arial";
 143                          break;
 144       case wxDEFAULT:
 145       default:           ff_family = FF_SWISS;
 146                          ff_face = "Arial" ;
 147     }
 148
 149     if (M_FONTDATA->m_style == wxITALIC || M_FONTDATA->m_style == wxSLANT)
 150       ff_italic = 1;
 151     else
 152       ff_italic = 0;
 153
 154     if (M_FONTDATA->m_weight == wxNORMAL)
 155       ff_weight = FW_NORMAL;
 156     else if (M_FONTDATA->m_weight == wxLIGHT)
 157       ff_weight = FW_LIGHT;
 158     else if (M_FONTDATA->m_weight == wxBOLD)
 159       ff_weight = FW_BOLD;
 160
 161     const char* pzFace = (const char*) ff_face;
 162     if (!M_FONTDATA->m_faceName.IsNull())
 163         pzFace = (const char*) M_FONTDATA->m_faceName ;
 164
 165 /* Always calculate fonts using the screen DC (is this the best strategy?)
 166  * There may be confusion if a font is selected into a printer
 167  * DC (say), because the height will be calculated very differently.
 168     // What sort of display is it?
 169     int technology = ::GetDeviceCaps(dc, TECHNOLOGY);
 170
 171     int nHeight;
 172
 173     if (technology != DT_RASDISPLAY && technology != DT_RASPRINTER)
 174     {
 175       // Have to get screen DC Caps, because a metafile will return 0.
 176       HDC dc2 = ::GetDC(NULL);
 177       nHeight = M_FONTDATA->m_pointSize*GetDeviceCaps(dc2, LOGPIXELSY)/72;
 178       ::ReleaseDC(NULL, dc2);
 179     }
 180     else
 181     {
 182       nHeight = M_FONTDATA->m_pointSize*GetDeviceCaps(dc, LOGPIXELSY)/72;
 183     }
 184 */
 185     // Have to get screen DC Caps, because a metafile will return 0.
 186     HDC dc2 = ::GetDC(NULL);
 187     int ppInch = ::GetDeviceCaps(dc2, LOGPIXELSY);
 188     ::ReleaseDC(NULL, dc2);
 189
 190     // New behaviour: apparently ppInch varies according to
 191     // Large/Small Fonts setting in Windows. This messes
 192     // up fonts. So, set ppInch to a constant 96 dpi.
 193     ppInch = 96;
 194
 195 #if wxFONT_SIZE_COMPATIBILITY
 196     // Incorrect, but compatible with old wxWindows behaviour
 197     int nHeight = (M_FONTDATA->m_pointSize*ppInch/72);
 198 #else
 199     // Correct for Windows compatibility
 200     int nHeight = - (M_FONTDATA->m_pointSize*ppInch/72);
 201 #endif
 202
 203     bool ff_underline = M_FONTDATA->m_underlined;
 204
 205     M_FONTDATA->m_hFont = (WXHFONT) CreateFont(nHeight, 0, 0, 0,ff_weight,ff_italic,(BYTE)ff_underline,
 206                 0, ANSI_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
 207                 PROOF_QUALITY, DEFAULT_PITCH | ff_family, pzFace);
 208 #ifdef WXDEBUG_CREATE
 209     if (m_hFont==NULL) wxError("Cannot create font","Internal Error") ;
 210 #endif
 211     return (M_FONTDATA->m_hFont != (WXHFONT) NULL);
 212   }
 213   return FALSE;
 214 }
 215
 216 bool wxFont::FreeResource(bool force)
 217 {
 218   if (M_FONTDATA && M_FONTDATA->m_hFont)
 219   {
 220     ::DeleteObject((HFONT) M_FONTDATA->m_hFont);
 221     M_FONTDATA->m_hFont = 0;
 222     return TRUE;
 223   }
 224   return FALSE;
 225 }
 226
 227 WXHANDLE wxFont::GetResourceHandle()
 228 {
 229   if ( !M_FONTDATA )
 230         return 0;
 231   else
 232     return (WXHANDLE)M_FONTDATA->m_hFont ;
 233 }
 234
 235 bool wxFont::IsFree() const
 236 {
 237   return (M_FONTDATA && (M_FONTDATA->m_hFont == 0));
 238 }
 239
 240 void wxFont::Unshare()
 241 {
 242         // Don't change shared data
 243         if (!m_refData)
 244     {
 245                 m_refData = new wxFontRefData();
 246         }
 247     else
 248     {
 249                 wxFontRefData* ref = new wxFontRefData(*(wxFontRefData*)m_refData);
 250                 UnRef();
 251                 m_refData = ref;
 252         }
 253 }
 254
 255 void wxFont::SetPointSize(int pointSize)
 256 {
 257     Unshare();
 258
 259     M_FONTDATA->m_pointSize = pointSize;
 260
 261     RealizeResource();
 262 }
 263
 264 void wxFont::SetFamily(int family)
 265 {
 266     Unshare();
 267
 268     M_FONTDATA->m_family = family;
 269
 270     RealizeResource();
 271 }
 272
 273 void wxFont::SetStyle(int style)
 274 {
 275     Unshare();
 276
 277     M_FONTDATA->m_style = style;
 278
 279     RealizeResource();
 280 }
 281
 282 void wxFont::SetWeight(int weight)
 283 {
 284     Unshare();
 285
 286     M_FONTDATA->m_weight = weight;
 287
 288     RealizeResource();
 289 }
 290
 291 void wxFont::SetFaceName(const wxString& faceName)
 292 {
 293     Unshare();
 294
 295     M_FONTDATA->m_faceName = faceName;
 296
 297     RealizeResource();
 298 }
 299
 300 void wxFont::SetUnderlined(bool underlined)
 301 {
 302     Unshare();
 303
 304     M_FONTDATA->m_underlined = underlined;
 305
 306     RealizeResource();
 307 }
 308
 309 wxString wxFont::GetFamilyString(void) const
 310 {
 311   wxString fam("");
 312   switch (GetFamily())
 313   {
 314     case wxDECORATIVE:
 315       fam = "wxDECORATIVE";
 316       break;
 317     case wxROMAN:
 318       fam = "wxROMAN";
 319       break;
 320     case wxSCRIPT:
 321       fam = "wxSCRIPT";
 322       break;
 323     case wxSWISS:
 324       fam = "wxSWISS";
 325       break;
 326     case wxMODERN:
 327       fam = "wxMODERN";
 328       break;
 329     case wxTELETYPE:
 330       fam = "wxTELETYPE";
 331       break;
 332     default:
 333       fam = "wxDEFAULT";
 334       break;
 335   }
 336   return fam;
 337 }
 338
 339 wxString wxFont::GetFaceName(void) const
 340 {
 341   wxString str("");
 342   if (M_FONTDATA)
 343         str = M_FONTDATA->m_faceName ;
 344   return str;
 345 }
 346
 347 wxString wxFont::GetStyleString(void) const
 348 {
 349   wxString styl("");
 350   switch (GetStyle())
 351   {
 352     case wxITALIC:
 353       styl = "wxITALIC";
 354       break;
 355     case wxSLANT:
 356       styl = "wxSLANT";
 357       break;
 358     default:
 359       styl = "wxNORMAL";
 360       break;
 361   }
 362   return styl;
 363 }
 364
 365 wxString wxFont::GetWeightString(void) const
 366 {
 367   wxString w("");
 368   switch (GetWeight())
 369   {
 370     case wxBOLD:
 371       w = "wxBOLD";
 372       break;
 373     case wxLIGHT:
 374       w = "wxLIGHT";
 375       break;
 376     default:
 377       w = "wxNORMAL";
 378       break;
 379   }
 380   return w;
 381 }
 382