samples/font/font.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        font.cpp
   3 // Purpose:     wxFont demo
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     30.09.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 Vadim Zeitlin
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx/wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 // for all others, include the necessary headers (this file is usually all you
  20 // need because it includes almost all standard wxWidgets headers
  21 #ifndef WX_PRECOMP
  22     #include "wx/wx.h"
  23
  24     #include "wx/log.h"
  25 #endif
  26
  27 #include "wx/choicdlg.h"
  28 #include "wx/fontdlg.h"
  29 #include "wx/fontenum.h"
  30 #include "wx/fontmap.h"
  31 #include "wx/encconv.h"
  32 #include "wx/splitter.h"
  33 #include "wx/textfile.h"
  34
  35 #ifdef __WXMAC__
  36 #undef wxFontDialog
  37 #include "wx/mac/fontdlg.h"
  38 #endif
  39
  40 // ----------------------------------------------------------------------------
  41 // private classes
  42 // ----------------------------------------------------------------------------
  43
  44 // Define a new application type, each program should derive a class from wxApp
  45 class MyApp : public wxApp
  46 {
  47 public:
  48     // override base class virtuals
  49     // ----------------------------
  50
  51     // this one is called on application startup and is a good place for the app
  52     // initialization (doing it here and not in the ctor allows to have an error
  53     // return: if OnInit() returns false, the application terminates)
  54     virtual bool OnInit();
  55 };
  56
  57 // MyCanvas is a canvas on which we show the font sample
  58 class MyCanvas: public wxWindow
  59 {
  60 public:
  61     MyCanvas( wxWindow *parent );
  62     virtual ~MyCanvas(){};
  63
  64     // accessors for the frame
  65     const wxFont& GetTextFont() const { return m_font; }
  66     const wxColour& GetColour() const { return m_colour; }
  67     void SetTextFont(const wxFont& font) { m_font = font; }
  68     void SetColour(const wxColour& colour) { m_colour = colour; }
  69
  70     // event handlers
  71     void OnPaint( wxPaintEvent &event );
  72
  73 private:
  74     wxColour m_colour;
  75     wxFont   m_font;
  76
  77     DECLARE_EVENT_TABLE()
  78 };
  79
  80 // Define a new frame type: this is going to be our main frame
  81 class MyFrame : public wxFrame
  82 {
  83 public:
  84     // ctor(s)
  85     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
  86
  87     // accessors
  88     MyCanvas *GetCanvas() const { return m_canvas; }
  89
  90     // event handlers (these functions should _not_ be virtual)
  91     void OnQuit(wxCommandEvent& event);
  92     void OnAbout(wxCommandEvent& event);
  93
  94     void OnIncFont(wxCommandEvent& WXUNUSED(event)) { DoResizeFont(+2); }
  95     void OnDecFont(wxCommandEvent& WXUNUSED(event)) { DoResizeFont(-2); }
  96
  97     void OnBold(wxCommandEvent& event);
  98     void OnItalic(wxCommandEvent& event);
  99     void OnUnderline(wxCommandEvent& event);
 100
 101     void OnwxPointerFont(wxCommandEvent& event);
 102
 103     void OnViewMsg(wxCommandEvent& event);
 104     void OnSelectFont(wxCommandEvent& event);
 105     void OnEnumerateFamiliesForEncoding(wxCommandEvent& event);
 106     void OnEnumerateFamilies(wxCommandEvent& WXUNUSED(event))
 107         { DoEnumerateFamilies(false); }
 108     void OnEnumerateFixedFamilies(wxCommandEvent& WXUNUSED(event))
 109         { DoEnumerateFamilies(true); }
 110     void OnEnumerateEncodings(wxCommandEvent& event);
 111
 112     void OnCheckNativeToFromString(wxCommandEvent& event);
 113
 114 protected:
 115     bool DoEnumerateFamilies(bool fixedWidthOnly,
 116                              wxFontEncoding encoding = wxFONTENCODING_SYSTEM,
 117                              bool silent = false);
 118
 119     void DoResizeFont(int diff);
 120     void DoChangeFont(const wxFont& font, const wxColour& col = wxNullColour);
 121
 122     size_t      m_fontSize; // in points
 123
 124     wxTextCtrl *m_textctrl;
 125     MyCanvas   *m_canvas;
 126
 127 private:
 128     // any class wishing to process wxWidgets events must use this macro
 129     DECLARE_EVENT_TABLE()
 130 };
 131
 132 // ----------------------------------------------------------------------------
 133 // constants
 134 // ----------------------------------------------------------------------------
 135
 136 // IDs for the controls and the menu commands
 137 enum
 138 {
 139     // menu items
 140     Font_Quit = 1,
 141     Font_About,
 142     Font_ViewMsg,
 143     Font_IncSize,
 144     Font_DecSize,
 145     Font_Bold,
 146     Font_Italic,
 147     Font_Underlined,
 148     Font_wxNORMAL_FONT,
 149     Font_wxSMALL_FONT,
 150     Font_wxITALIC_FONT,
 151     Font_wxSWISS_FONT,
 152     Font_Standard,
 153
 154     Font_Choose = 100,
 155     Font_EnumFamiliesForEncoding,
 156     Font_EnumFamilies,
 157     Font_EnumFixedFamilies,
 158     Font_EnumEncodings,
 159     Font_CheckNativeToFromString,
 160     Font_Max
 161 };
 162
 163 // ----------------------------------------------------------------------------
 164 // event tables and other macros for wxWidgets
 165 // ----------------------------------------------------------------------------
 166
 167 // the event tables connect the wxWidgets events with the functions (event
 168 // handlers) which process them. It can be also done at run-time, but for the
 169 // simple menu events like this the static method is much simpler.
 170 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 171     EVT_MENU(Font_Quit,  MyFrame::OnQuit)
 172     EVT_MENU(Font_ViewMsg, MyFrame::OnViewMsg)
 173     EVT_MENU(Font_About, MyFrame::OnAbout)
 174
 175     EVT_MENU(Font_IncSize, MyFrame::OnIncFont)
 176     EVT_MENU(Font_DecSize, MyFrame::OnDecFont)
 177     EVT_MENU(Font_Bold, MyFrame::OnBold)
 178     EVT_MENU(Font_Italic, MyFrame::OnItalic)
 179     EVT_MENU(Font_Underlined, MyFrame::OnUnderline)
 180
 181     EVT_MENU(Font_wxNORMAL_FONT, MyFrame::OnwxPointerFont)
 182     EVT_MENU(Font_wxSMALL_FONT, MyFrame::OnwxPointerFont)
 183     EVT_MENU(Font_wxITALIC_FONT, MyFrame::OnwxPointerFont)
 184     EVT_MENU(Font_wxSWISS_FONT, MyFrame::OnwxPointerFont)
 185
 186     EVT_MENU(Font_CheckNativeToFromString, MyFrame::OnCheckNativeToFromString)
 187
 188     EVT_MENU(Font_Choose, MyFrame::OnSelectFont)
 189     EVT_MENU(Font_EnumFamiliesForEncoding, MyFrame::OnEnumerateFamiliesForEncoding)
 190     EVT_MENU(Font_EnumFamilies, MyFrame::OnEnumerateFamilies)
 191     EVT_MENU(Font_EnumFixedFamilies, MyFrame::OnEnumerateFixedFamilies)
 192     EVT_MENU(Font_EnumEncodings, MyFrame::OnEnumerateEncodings)
 193 END_EVENT_TABLE()
 194
 195 // Create a new application object: this macro will allow wxWidgets to create
 196 // the application object during program execution (it's better than using a
 197 // static object for many reasons) and also declares the accessor function
 198 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 199 // not wxApp)
 200 IMPLEMENT_APP(MyApp)
 201
 202 // ============================================================================
 203 // implementation
 204 // ============================================================================
 205
 206 // ----------------------------------------------------------------------------
 207 // the application class
 208 // ----------------------------------------------------------------------------
 209
 210 // `Main program' equivalent: the program execution "starts" here
 211 bool MyApp::OnInit()
 212 {
 213     // Create the main application window
 214     MyFrame *frame = new MyFrame(wxT("Font wxWidgets demo"),
 215                                  wxPoint(50, 50), wxSize(600, 400));
 216
 217     // Show it and tell the application that it's our main window
 218     frame->Show(true);
 219     SetTopWindow(frame);
 220
 221     // success: wxApp::OnRun() will be called which will enter the main message
 222     // loop and the application will run. If we returned 'false' here, the
 223     // application would exit immediately.
 224     return true;
 225 }
 226
 227 // ----------------------------------------------------------------------------
 228 // main frame
 229 // ----------------------------------------------------------------------------
 230
 231 // frame constructor
 232 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 233        : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size), m_textctrl(NULL)
 234 {
 235     m_fontSize = 12;
 236
 237     // create a menu bar
 238     wxMenu *menuFile = new wxMenu;
 239
 240     menuFile->Append(Font_ViewMsg, wxT("&View...\tCtrl-V"),
 241                      wxT("View an email message file"));
 242     menuFile->AppendSeparator();
 243     menuFile->Append(Font_About, wxT("&About...\tCtrl-A"), wxT("Show about dialog"));
 244     menuFile->AppendSeparator();
 245     menuFile->Append(Font_Quit, wxT("E&xit\tAlt-X"), wxT("Quit this program"));
 246
 247     wxMenu *menuFont = new wxMenu;
 248     menuFont->Append(Font_IncSize, wxT("&Increase font size by 2 points\tCtrl-I"));
 249     menuFont->Append(Font_DecSize, wxT("&Decrease font size by 2 points\tCtrl-D"));
 250     menuFont->AppendSeparator();
 251     menuFont->AppendCheckItem(Font_Bold, wxT("&Bold\tCtrl-B"), wxT("Toggle bold state"));
 252     menuFont->AppendCheckItem(Font_Italic, wxT("&Oblique\tCtrl-O"), wxT("Toggle italic state"));
 253     menuFont->AppendCheckItem(Font_Underlined, wxT("&Underlined\tCtrl-U"),
 254                      wxT("Toggle underlined state"));
 255
 256     menuFont->AppendSeparator();
 257     menuFont->Append(Font_CheckNativeToFromString,
 258                      wxT("Check Native Font Info To/From String"));
 259
 260     wxMenu *menuSelect = new wxMenu;
 261     menuSelect->Append(Font_Choose, wxT("&Select font...\tCtrl-S"),
 262                      wxT("Select a standard font"));
 263
 264     wxMenu *menuStdFonts = new wxMenu;
 265     menuStdFonts->Append(Font_wxNORMAL_FONT, wxT("wxNORMAL_FONT"), wxT("Normal font used by wxWidgets"));
 266     menuStdFonts->Append(Font_wxSMALL_FONT,  wxT("wxSMALL_FONT"),  wxT("Small font used by wxWidgets"));
 267     menuStdFonts->Append(Font_wxITALIC_FONT, wxT("wxITALIC_FONT"), wxT("Italic font used by wxWidgets"));
 268     menuStdFonts->Append(Font_wxSWISS_FONT,  wxT("wxSWISS_FONT"),  wxT("Swiss font used by wxWidgets"));
 269     menuSelect->Append(Font_Standard, wxT("Standar&d fonts"), menuStdFonts);
 270
 271     menuSelect->AppendSeparator();
 272     menuSelect->Append(Font_EnumFamilies, wxT("Enumerate font &families\tCtrl-F"));
 273     menuSelect->Append(Font_EnumFixedFamilies,
 274                      wxT("Enumerate fi&xed font families\tCtrl-X"));
 275     menuSelect->Append(Font_EnumEncodings,
 276                      wxT("Enumerate &encodings\tCtrl-E"));
 277     menuSelect->Append(Font_EnumFamiliesForEncoding,
 278                      wxT("Find font for en&coding...\tCtrl-C"),
 279                      wxT("Find font families for given encoding"));
 280
 281     // now append the freshly created menu to the menu bar...
 282     wxMenuBar *menuBar = new wxMenuBar;
 283     menuBar->Append(menuFile, wxT("&File"));
 284     menuBar->Append(menuFont, wxT("F&ont"));
 285     menuBar->Append(menuSelect, wxT("&Select"));
 286
 287     // ... and attach this menu bar to the frame
 288     SetMenuBar(menuBar);
 289
 290     wxSplitterWindow *splitter = new wxSplitterWindow(this);
 291
 292     m_textctrl = new wxTextCtrl(splitter, wxID_ANY,
 293                                 wxT("Paste text here to see how it looks\nlike in the given font"),
 294                                 wxDefaultPosition, wxDefaultSize,
 295                                 wxTE_MULTILINE);
 296
 297     m_canvas = new MyCanvas(splitter);
 298
 299     splitter->SplitHorizontally(m_textctrl, m_canvas, 100);
 300
 301 #if wxUSE_STATUSBAR
 302     // create a status bar just for fun (by default with 1 pane only)
 303     CreateStatusBar();
 304     SetStatusText(wxT("Welcome to wxWidgets font demo!"));
 305 #endif // wxUSE_STATUSBAR
 306 }
 307
 308 // --------------------------------------------------------
 309
 310 class MyEncodingEnumerator : public wxFontEnumerator
 311 {
 312 public:
 313     MyEncodingEnumerator()
 314         { m_n = 0; }
 315
 316     const wxString& GetText() const
 317         { return m_text; }
 318
 319 protected:
 320     virtual bool OnFontEncoding(const wxString& facename,
 321                                 const wxString& encoding)
 322     {
 323         wxString text;
 324         text.Printf(wxT("Encoding %u: %s (available in facename '%s')\n"),
 325                     (unsigned int) ++m_n, encoding.c_str(), facename.c_str());
 326         m_text += text;
 327         return true;
 328     }
 329
 330 private:
 331     size_t m_n;
 332     wxString m_text;
 333 };
 334
 335 void MyFrame::OnEnumerateEncodings(wxCommandEvent& WXUNUSED(event))
 336 {
 337     MyEncodingEnumerator fontEnumerator;
 338
 339     fontEnumerator.EnumerateEncodings();
 340
 341     wxLogMessage(wxT("Enumerating all available encodings:\n%s"),
 342                  fontEnumerator.GetText().c_str());
 343 }
 344
 345 // -------------------------------------------------------------
 346
 347 class MyFontEnumerator : public wxFontEnumerator
 348 {
 349 public:
 350     bool GotAny() const
 351         { return !m_facenames.IsEmpty(); }
 352
 353     const wxArrayString& GetFacenames() const
 354         { return m_facenames; }
 355
 356 protected:
 357     virtual bool OnFacename(const wxString& facename)
 358     {
 359         m_facenames.Add(facename);
 360         return true;
 361     }
 362
 363     private:
 364         wxArrayString m_facenames;
 365 } fontEnumerator;
 366
 367 bool MyFrame::DoEnumerateFamilies(bool fixedWidthOnly,
 368                                   wxFontEncoding encoding,
 369                                   bool silent)
 370 {
 371     MyFontEnumerator fontEnumerator;
 372
 373     fontEnumerator.EnumerateFacenames(encoding, fixedWidthOnly);
 374
 375     if ( fontEnumerator.GotAny() )
 376     {
 377         int nFacenames = fontEnumerator.GetFacenames().GetCount();
 378         if ( !silent )
 379         {
 380             wxLogStatus(this, wxT("Found %d %sfonts"),
 381                         nFacenames, fixedWidthOnly ? wxT("fixed width ") : wxT(""));
 382         }
 383
 384         wxString facename;
 385         if ( silent )
 386         {
 387             // choose the first
 388             facename = fontEnumerator.GetFacenames().Item(0);
 389         }
 390         else
 391         {
 392             // let the user choose
 393             wxString *facenames = new wxString[nFacenames];
 394             int n;
 395             for ( n = 0; n < nFacenames; n++ )
 396                 facenames[n] = fontEnumerator.GetFacenames().Item(n);
 397
 398             n = wxGetSingleChoiceIndex(wxT("Choose a facename"), wxT("Font demo"),
 399                                        nFacenames, facenames, this);
 400
 401             if ( n != -1 )
 402                 facename = facenames[n];
 403
 404             delete [] facenames;
 405         }
 406
 407         if ( !facename.IsEmpty() )
 408         {
 409             wxFont font(12, wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL,
 410                         wxFONTWEIGHT_NORMAL, false, facename, encoding);
 411
 412             DoChangeFont(font);
 413         }
 414
 415         return true;
 416     }
 417     else if ( !silent )
 418     {
 419         wxLogWarning(wxT("No such fonts found."));
 420     }
 421
 422     return false;
 423 }
 424
 425 void MyFrame::OnEnumerateFamiliesForEncoding(wxCommandEvent& WXUNUSED(event))
 426 {
 427     static wxFontEncoding encodings[] =
 428     {
 429         wxFONTENCODING_ISO8859_1,
 430         wxFONTENCODING_ISO8859_2,
 431         wxFONTENCODING_ISO8859_5,
 432         wxFONTENCODING_ISO8859_7,
 433         wxFONTENCODING_ISO8859_15,
 434         wxFONTENCODING_KOI8,
 435         wxFONTENCODING_KOI8_U,
 436         wxFONTENCODING_CP1250,
 437         wxFONTENCODING_CP1251,
 438         wxFONTENCODING_CP1252,
 439     };
 440
 441     static const wxString encodingNames[] =
 442     {
 443         wxT("Western European (ISO-8859-1)"),
 444         wxT("Central European (ISO-8859-2)"),
 445         wxT("Cyrillic (ISO-8859-5)"),
 446         wxT("Greek (ISO-8859-7)"),
 447         wxT("Western European with Euro (ISO-8859-15)"),
 448         wxT("KOI8-R"),
 449         wxT("KOI8-U"),
 450         wxT("Windows Central European (CP 1250)"),
 451         wxT("Windows Cyrillic (CP 1251)"),
 452         wxT("Windows Western European (CP 1252)"),
 453     };
 454
 455     int n = wxGetSingleChoiceIndex(wxT("Choose an encoding"), wxT("Font demo"),
 456                                    WXSIZEOF(encodingNames),
 457                                    encodingNames,
 458                                    this);
 459
 460     if ( n != -1 )
 461     {
 462         DoEnumerateFamilies(false, encodings[n]);
 463     }
 464 }
 465
 466 void MyFrame::OnCheckNativeToFromString(wxCommandEvent& WXUNUSED(event))
 467 {
 468     wxString fontInfo = m_canvas->GetTextFont().GetNativeFontInfoDesc();
 469
 470     if ( fontInfo.IsEmpty() )
 471     {
 472         wxLogError(wxT("Native font info string is empty!"));
 473     }
 474     else
 475     {
 476         wxFont *font = wxFont::New(fontInfo);
 477         if ( fontInfo != font->GetNativeFontInfoDesc() )
 478             wxLogError(wxT("wxNativeFontInfo ToString()/FromString() broken!"));
 479         else
 480             wxLogMessage(wxT("wxNativeFontInfo works: %s"), fontInfo.c_str());
 481
 482         delete font;
 483      }
 484 }
 485
 486 void MyFrame::DoResizeFont(int diff)
 487 {
 488     wxFont font = m_canvas->GetTextFont();
 489
 490     font.SetPointSize(font.GetPointSize() + diff);
 491     DoChangeFont(font);
 492 }
 493
 494 void MyFrame::OnBold(wxCommandEvent& event)
 495 {
 496     wxFont font = m_canvas->GetTextFont();
 497
 498     font.SetWeight(event.IsChecked() ? wxFONTWEIGHT_BOLD : wxFONTWEIGHT_NORMAL);
 499     DoChangeFont(font);
 500 }
 501
 502 void MyFrame::OnItalic(wxCommandEvent& event)
 503 {
 504     wxFont font = m_canvas->GetTextFont();
 505
 506     font.SetStyle(event.IsChecked() ? wxFONTSTYLE_ITALIC : wxFONTSTYLE_NORMAL);
 507     DoChangeFont(font);
 508 }
 509
 510 void MyFrame::OnUnderline(wxCommandEvent& event)
 511 {
 512     wxFont font = m_canvas->GetTextFont();
 513
 514     font.SetUnderlined(event.IsChecked());
 515     DoChangeFont(font);
 516 }
 517
 518 void MyFrame::OnwxPointerFont(wxCommandEvent& event)
 519 {
 520     wxFont font;
 521
 522     switch (event.GetId())
 523     {
 524         case Font_wxNORMAL_FONT : font = wxFont(*wxNORMAL_FONT); break;
 525         case Font_wxSMALL_FONT  : font = wxFont(*wxSMALL_FONT); break;
 526         case Font_wxITALIC_FONT : font = wxFont(*wxITALIC_FONT); break;
 527         case Font_wxSWISS_FONT  : font = wxFont(*wxSWISS_FONT); break;
 528         default                 : font = wxFont(*wxNORMAL_FONT); break;
 529     }
 530
 531     GetMenuBar()->Check(Font_Bold, false);
 532     GetMenuBar()->Check(Font_Italic, false);
 533     GetMenuBar()->Check(Font_Underlined, false);
 534
 535     DoChangeFont(font);
 536 }
 537
 538 void MyFrame::DoChangeFont(const wxFont& font, const wxColour& col)
 539 {
 540     m_canvas->SetTextFont(font);
 541     if ( col.Ok() )
 542         m_canvas->SetColour(col);
 543     m_canvas->Refresh();
 544
 545     m_textctrl->SetFont(font);
 546     if ( col.Ok() )
 547         m_textctrl->SetForegroundColour(col);
 548 }
 549
 550 void MyFrame::OnSelectFont(wxCommandEvent& WXUNUSED(event))
 551 {
 552     wxFontData data;
 553     data.SetInitialFont(m_canvas->GetTextFont());
 554     data.SetColour(m_canvas->GetColour());
 555
 556     wxFontDialog dialog(this, data);
 557     if ( dialog.ShowModal() == wxID_OK )
 558     {
 559         wxFontData retData = dialog.GetFontData();
 560         wxFont font = retData.GetChosenFont();
 561         wxColour colour = retData.GetColour();
 562
 563         DoChangeFont(font, colour);
 564
 565         // update the state of the bold/italic/underlined menu items
 566         wxMenuBar *mbar = GetMenuBar();
 567         if ( mbar )
 568         {
 569             mbar->Check(Font_Bold, font.GetWeight() == wxFONTWEIGHT_BOLD);
 570             mbar->Check(Font_Italic, font.GetStyle() == wxFONTSTYLE_ITALIC);
 571             mbar->Check(Font_Underlined, font.GetUnderlined());
 572         }
 573     }
 574 }
 575
 576 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 577 {
 578     // true is to force the frame to close
 579     Close(true);
 580 }
 581
 582 void MyFrame::OnViewMsg(wxCommandEvent& WXUNUSED(event))
 583 {
 584     // first, choose the file
 585     static wxString s_dir, s_file;
 586     wxFileDialog dialog(this, wxT("Open an email message file"),
 587                         s_dir, s_file);
 588     if ( dialog.ShowModal() != wxID_OK )
 589         return;
 590
 591     // save for the next time
 592     s_dir = dialog.GetDirectory();
 593     s_file = dialog.GetFilename();
 594
 595     wxString filename = dialog.GetPath();
 596
 597     // load it and search for Content-Type header
 598     wxTextFile file(filename);
 599     if ( !file.Open() )
 600         return;
 601
 602     wxString charset;
 603
 604     static const wxChar *prefix = wxT("Content-Type: text/plain; charset=");
 605     const size_t len = wxStrlen(prefix);
 606
 607     size_t n, count = file.GetLineCount();
 608     for ( n = 0; n < count; n++ )
 609     {
 610         wxString line = file[n];
 611
 612         if ( !line )
 613         {
 614             // if it is an email message, headers are over, no need to parse
 615             // all the file
 616             break;
 617         }
 618
 619         if ( line.Left(len) == prefix )
 620         {
 621             // found!
 622             const wxChar *pc = line.c_str() + len;
 623             if ( *pc == wxT('"') )
 624                 pc++;
 625
 626             while ( *pc && *pc != wxT('"') )
 627             {
 628                 charset += *pc++;
 629             }
 630
 631             break;
 632         }
 633     }
 634
 635     if ( !charset )
 636     {
 637         wxLogError(wxT("The file '%s' doesn't contain charset information."),
 638                    filename.c_str());
 639
 640         return;
 641     }
 642
 643     // ok, now get the corresponding encoding
 644     wxFontEncoding fontenc = wxFontMapper::Get()->CharsetToEncoding(charset);
 645     if ( fontenc == wxFONTENCODING_SYSTEM )
 646     {
 647         wxLogError(wxT("Charset '%s' is unsupported."), charset.c_str());
 648         return;
 649     }
 650
 651     m_textctrl->LoadFile(filename);
 652
 653     if ( fontenc == wxFONTENCODING_UTF8 ||
 654             !wxFontMapper::Get()->IsEncodingAvailable(fontenc) )
 655     {
 656         // try to find some similar encoding:
 657         wxFontEncoding encAlt;
 658         if ( wxFontMapper::Get()->GetAltForEncoding(fontenc, &encAlt) )
 659         {
 660             wxEncodingConverter conv;
 661
 662             if (conv.Init(fontenc, encAlt))
 663             {
 664                 fontenc = encAlt;
 665                 m_textctrl -> SetValue(conv.Convert(m_textctrl -> GetValue()));
 666             }
 667             else
 668             {
 669                 wxLogWarning(wxT("Cannot convert from '%s' to '%s'."),
 670                              wxFontMapper::GetEncodingDescription(fontenc).c_str(),
 671                              wxFontMapper::GetEncodingDescription(encAlt).c_str());
 672             }
 673         }
 674         else
 675             wxLogWarning(wxT("No fonts for encoding '%s' on this system."),
 676                          wxFontMapper::GetEncodingDescription(fontenc).c_str());
 677     }
 678
 679     // and now create the correct font
 680     if ( !DoEnumerateFamilies(false, fontenc, true /* silent */) )
 681     {
 682         wxFont font(12, wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL,
 683                     wxFONTWEIGHT_NORMAL, false /* !underlined */,
 684                     wxEmptyString /* facename */, fontenc);
 685         if ( font.Ok() )
 686         {
 687             DoChangeFont(font);
 688         }
 689         else
 690         {
 691             wxLogWarning(wxT("No fonts for encoding '%s' on this system."),
 692                          wxFontMapper::GetEncodingDescription(fontenc).c_str());
 693         }
 694     }
 695 }
 696
 697 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 698 {
 699     wxMessageBox(wxT("wxWidgets font demo\n")
 700                  wxT("(c) 1999 Vadim Zeitlin"),
 701                  wxT("About Font"),
 702                  wxOK | wxICON_INFORMATION, this);
 703 }
 704
 705 // ----------------------------------------------------------------------------
 706 // MyCanvas
 707 // ----------------------------------------------------------------------------
 708
 709 BEGIN_EVENT_TABLE(MyCanvas, wxWindow)
 710     EVT_PAINT(MyCanvas::OnPaint)
 711 END_EVENT_TABLE()
 712
 713 MyCanvas::MyCanvas( wxWindow *parent )
 714         : wxWindow( parent, wxID_ANY ),
 715           m_colour(*wxRED), m_font(*wxNORMAL_FONT)
 716 {
 717 }
 718
 719 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 720 {
 721     wxPaintDC dc(this);
 722     PrepareDC(dc);
 723
 724     // set background
 725     dc.SetBackground(wxBrush(wxT("white"), wxSOLID));
 726     dc.Clear();
 727
 728     // one text line height
 729     wxCoord hLine = dc.GetCharHeight();
 730
 731     // the current text origin
 732     wxCoord x = 5,
 733             y = 5;
 734
 735     // output the font name/info
 736     wxString fontInfo;
 737     fontInfo.Printf(wxT("Font size is %d points, family: %s, encoding: %s"),
 738                     m_font.GetPointSize(),
 739                     m_font.GetFamilyString().c_str(),
 740                     wxFontMapper::Get()->
 741                         GetEncodingDescription(m_font.GetEncoding()).c_str());
 742
 743     dc.DrawText(fontInfo, x, y);
 744     y += hLine;
 745
 746     fontInfo.Printf(wxT("Style: %s, weight: %s, fixed width: %s"),
 747                     m_font.GetStyleString().c_str(),
 748                     m_font.GetWeightString().c_str(),
 749                     m_font.IsFixedWidth() ? _T("yes") : _T("no"));
 750
 751     dc.DrawText(fontInfo, x, y);
 752     y += hLine;
 753
 754     if ( m_font.Ok() )
 755     {
 756         const wxNativeFontInfo *info = m_font.GetNativeFontInfo();
 757         if ( info )
 758         {
 759             wxString fontDesc = m_font.GetNativeFontInfoUserDesc();
 760             fontInfo.Printf(wxT("Native font info: %s"), fontDesc.c_str());
 761
 762             dc.DrawText(fontInfo, x, y);
 763             y += hLine;
 764         }
 765     }
 766
 767     y += hLine;
 768
 769     // prepare to draw the font
 770     dc.SetFont(m_font);
 771     dc.SetTextForeground(m_colour);
 772
 773     // the size of one cell (Normally biggest char + small margin)
 774     long maxCharWidth, maxCharHeight;
 775     dc.GetTextExtent(wxT("W"), &maxCharWidth, &maxCharHeight);
 776     int w = maxCharWidth + 5,
 777         h = maxCharHeight + 4;
 778
 779
 780     // print all font symbols from 32 to 256 in 7 rows of 32 chars each
 781     for ( int i = 0; i < 7; i++ )
 782     {
 783         for ( int j = 0; j < 32; j++ )
 784         {
 785             wxChar c = (wxChar)(32 * (i + 1) + j);
 786
 787             long charWidth, charHeight;
 788             dc.GetTextExtent(c, &charWidth, &charHeight);
 789             dc.DrawText
 790             (
 791                 c,
 792                 x + w*j + (maxCharWidth - charWidth) / 2 + 1,
 793                 y + h*i + (maxCharHeight - charHeight) / 2
 794             );
 795         }
 796     }
 797
 798     // draw the lines between them
 799     dc.SetPen(wxPen(wxColour(_T("blue")), 1, wxSOLID));
 800     int l;
 801
 802     // horizontal
 803     for ( l = 0; l < 8; l++ )
 804     {
 805         int yl = y + h*l - 2;
 806         dc.DrawLine(x - 2, yl, x + 32*w - 1, yl);
 807     }
 808
 809     // and vertical
 810     for ( l = 0; l < 33; l++ )
 811     {
 812         int xl = x + w*l - 2;
 813         dc.DrawLine(xl, y - 2, xl, y + 7*h - 1);
 814     }
 815 }