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 #include "wx/settings.h"
  35
  36 #include "../sample.xpm"
  37
  38 #ifdef __WXMAC__
  39     #undef wxFontDialog
  40     #include "wx/osx/fontdlg.h"
  41 #endif
  42
  43 // used as title for several dialog boxes
  44 static const wxChar SAMPLE_TITLE[] = wxT("wxWidgets Font Sample");
  45
  46 // ----------------------------------------------------------------------------
  47 // private classes
  48 // ----------------------------------------------------------------------------
  49
  50 // Define a new application type, each program should derive a class from wxApp
  51 class MyApp : public wxApp
  52 {
  53 public:
  54     // override base class virtuals
  55     // ----------------------------
  56
  57     // this one is called on application startup and is a good place for the app
  58     // initialization (doing it here and not in the ctor allows to have an error
  59     // return: if OnInit() returns false, the application terminates)
  60     virtual bool OnInit();
  61 };
  62
  63 // MyCanvas is a canvas on which we show the font sample
  64 class MyCanvas: public wxWindow
  65 {
  66 public:
  67     MyCanvas( wxWindow *parent );
  68     virtual ~MyCanvas(){};
  69
  70     // accessors for the frame
  71     const wxFont& GetTextFont() const { return m_font; }
  72     const wxColour& GetColour() const { return m_colour; }
  73     void SetTextFont(const wxFont& font) { m_font = font; }
  74     void SetColour(const wxColour& colour) { m_colour = colour; }
  75
  76     // event handlers
  77     void OnPaint( wxPaintEvent &event );
  78
  79 private:
  80     wxColour m_colour;
  81     wxFont   m_font;
  82
  83     DECLARE_EVENT_TABLE()
  84 };
  85
  86 // Define a new frame type: this is going to be our main frame
  87 class MyFrame : public wxFrame
  88 {
  89 public:
  90     // ctor(s)
  91     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
  92
  93     // accessors
  94     MyCanvas *GetCanvas() const { return m_canvas; }
  95
  96     // event handlers (these functions should _not_ be virtual)
  97     void OnQuit(wxCommandEvent& event);
  98     void OnAbout(wxCommandEvent& event);
  99
 100     void OnIncFont(wxCommandEvent& WXUNUSED(event)) { DoResizeFont(+2); }
 101     void OnDecFont(wxCommandEvent& WXUNUSED(event)) { DoResizeFont(-2); }
 102
 103     void OnBold(wxCommandEvent& event);
 104     void OnLight(wxCommandEvent& event);
 105
 106     void OnItalic(wxCommandEvent& event);
 107     void OnSlant(wxCommandEvent& event);
 108
 109     void OnUnderline(wxCommandEvent& event);
 110
 111     void OnwxPointerFont(wxCommandEvent& event);
 112     void OnwxSystemSettingsFont(wxCommandEvent& event);
 113
 114     void OnTestTextValue(wxCommandEvent& event);
 115     void OnViewMsg(wxCommandEvent& event);
 116     void OnSelectFont(wxCommandEvent& event);
 117     void OnEnumerateFamiliesForEncoding(wxCommandEvent& event);
 118     void OnEnumerateFamilies(wxCommandEvent& WXUNUSED(event))
 119         { DoEnumerateFamilies(false); }
 120     void OnEnumerateFixedFamilies(wxCommandEvent& WXUNUSED(event))
 121         { DoEnumerateFamilies(true); }
 122     void OnEnumerateEncodings(wxCommandEvent& event);
 123
 124     void OnSetNativeDesc(wxCommandEvent& event);
 125     void OnSetNativeUserDesc(wxCommandEvent& event);
 126
 127     void OnSetFamily(wxCommandEvent& event);
 128     void OnSetFaceName(wxCommandEvent& event);
 129     void OnSetEncoding(wxCommandEvent& event);
 130
 131 protected:
 132     bool DoEnumerateFamilies(bool fixedWidthOnly,
 133                              wxFontEncoding encoding = wxFONTENCODING_SYSTEM,
 134                              bool silent = false);
 135
 136     void DoResizeFont(int diff);
 137     void DoChangeFont(const wxFont& font, const wxColour& col = wxNullColour);
 138
 139     // ask the user to choose an encoding and return it or
 140     // wxFONTENCODING_SYSTEM if the dialog was cancelled
 141     wxFontEncoding GetEncodingFromUser();
 142
 143     // ask the user to choose a font family and return it or
 144     // wxFONTFAMILY_DEFAULT if the dialog was cancelled
 145     wxFontFamily GetFamilyFromUser();
 146
 147     size_t      m_fontSize; // in points
 148
 149     wxTextCtrl *m_textctrl;
 150     MyCanvas   *m_canvas;
 151
 152 private:
 153     // any class wishing to process wxWidgets events must use this macro
 154     DECLARE_EVENT_TABLE()
 155 };
 156
 157 // ----------------------------------------------------------------------------
 158 // constants
 159 // ----------------------------------------------------------------------------
 160
 161 // IDs for the controls and the menu commands
 162 enum
 163 {
 164     // menu items
 165     Font_Quit = wxID_EXIT,
 166     Font_About = wxID_ABOUT,
 167
 168     Font_ViewMsg = wxID_HIGHEST+1,
 169     Font_TestTextValue,
 170
 171     Font_IncSize,
 172     Font_DecSize,
 173
 174     Font_Bold,
 175     Font_Light,
 176
 177     Font_Italic,
 178     Font_Slant,
 179
 180     Font_Underlined,
 181
 182     // standard global wxFont objects:
 183     Font_wxNORMAL_FONT,
 184     Font_wxSMALL_FONT,
 185     Font_wxITALIC_FONT,
 186     Font_wxSWISS_FONT,
 187     Font_Standard,
 188
 189     // wxSystemSettings::GetFont possible objects:
 190     Font_wxSYS_OEM_FIXED_FONT,
 191     Font_wxSYS_ANSI_FIXED_FONT,
 192     Font_wxSYS_ANSI_VAR_FONT,
 193     Font_wxSYS_SYSTEM_FONT,
 194     Font_wxSYS_DEVICE_DEFAULT_FONT,
 195     Font_wxSYS_DEFAULT_GUI_FONT,
 196     Font_SystemSettings,
 197
 198     Font_Choose = 100,
 199     Font_EnumFamiliesForEncoding,
 200     Font_EnumFamilies,
 201     Font_EnumFixedFamilies,
 202     Font_EnumEncodings,
 203     Font_SetNativeDesc,
 204     Font_SetNativeUserDesc,
 205     Font_SetFamily,
 206     Font_SetFaceName,
 207     Font_SetEncoding,
 208     Font_Max
 209 };
 210
 211 // ----------------------------------------------------------------------------
 212 // event tables and other macros for wxWidgets
 213 // ----------------------------------------------------------------------------
 214
 215 // the event tables connect the wxWidgets events with the functions (event
 216 // handlers) which process them. It can be also done at run-time, but for the
 217 // simple menu events like this the static method is much simpler.
 218 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 219     EVT_MENU(Font_Quit,  MyFrame::OnQuit)
 220     EVT_MENU(Font_TestTextValue, MyFrame::OnTestTextValue)
 221     EVT_MENU(Font_ViewMsg, MyFrame::OnViewMsg)
 222     EVT_MENU(Font_About, MyFrame::OnAbout)
 223
 224     EVT_MENU(Font_IncSize, MyFrame::OnIncFont)
 225     EVT_MENU(Font_DecSize, MyFrame::OnDecFont)
 226
 227     EVT_MENU(Font_Bold, MyFrame::OnBold)
 228     EVT_MENU(Font_Light, MyFrame::OnLight)
 229
 230     EVT_MENU(Font_Italic, MyFrame::OnItalic)
 231     EVT_MENU(Font_Slant, MyFrame::OnSlant)
 232
 233     EVT_MENU(Font_Underlined, MyFrame::OnUnderline)
 234
 235     EVT_MENU(Font_wxNORMAL_FONT, MyFrame::OnwxPointerFont)
 236     EVT_MENU(Font_wxSMALL_FONT, MyFrame::OnwxPointerFont)
 237     EVT_MENU(Font_wxITALIC_FONT, MyFrame::OnwxPointerFont)
 238     EVT_MENU(Font_wxSWISS_FONT, MyFrame::OnwxPointerFont)
 239
 240     EVT_MENU(Font_wxSYS_OEM_FIXED_FONT, MyFrame::OnwxSystemSettingsFont)
 241     EVT_MENU(Font_wxSYS_ANSI_FIXED_FONT, MyFrame::OnwxSystemSettingsFont)
 242     EVT_MENU(Font_wxSYS_ANSI_VAR_FONT, MyFrame::OnwxSystemSettingsFont)
 243     EVT_MENU(Font_wxSYS_SYSTEM_FONT, MyFrame::OnwxSystemSettingsFont)
 244     EVT_MENU(Font_wxSYS_DEVICE_DEFAULT_FONT, MyFrame::OnwxSystemSettingsFont)
 245     EVT_MENU(Font_wxSYS_DEFAULT_GUI_FONT, MyFrame::OnwxSystemSettingsFont)
 246
 247     EVT_MENU(Font_SetNativeDesc, MyFrame::OnSetNativeDesc)
 248     EVT_MENU(Font_SetNativeUserDesc, MyFrame::OnSetNativeUserDesc)
 249     EVT_MENU(Font_SetFamily, MyFrame::OnSetFamily)
 250     EVT_MENU(Font_SetFaceName, MyFrame::OnSetFaceName)
 251     EVT_MENU(Font_SetEncoding, MyFrame::OnSetEncoding)
 252
 253     EVT_MENU(Font_Choose, MyFrame::OnSelectFont)
 254     EVT_MENU(Font_EnumFamiliesForEncoding, MyFrame::OnEnumerateFamiliesForEncoding)
 255     EVT_MENU(Font_EnumFamilies, MyFrame::OnEnumerateFamilies)
 256     EVT_MENU(Font_EnumFixedFamilies, MyFrame::OnEnumerateFixedFamilies)
 257     EVT_MENU(Font_EnumEncodings, MyFrame::OnEnumerateEncodings)
 258 END_EVENT_TABLE()
 259
 260 // Create a new application object: this macro will allow wxWidgets to create
 261 // the application object during program execution (it's better than using a
 262 // static object for many reasons) and also declares the accessor function
 263 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 264 // not wxApp)
 265 IMPLEMENT_APP(MyApp)
 266
 267 // ============================================================================
 268 // implementation
 269 // ============================================================================
 270
 271 // ----------------------------------------------------------------------------
 272 // the application class
 273 // ----------------------------------------------------------------------------
 274
 275 // `Main program' equivalent: the program execution "starts" here
 276 bool MyApp::OnInit()
 277 {
 278     if ( !wxApp::OnInit() )
 279         return false;
 280
 281     // Create the main application window
 282     MyFrame *frame = new MyFrame(wxT("Font wxWidgets demo"),
 283                                  wxPoint(50, 50), wxSize(600, 400));
 284
 285     // Show it
 286     frame->Show(true);
 287
 288     // success: wxApp::OnRun() will be called which will enter the main message
 289     // loop and the application will run. If we returned 'false' here, the
 290     // application would exit immediately.
 291     return true;
 292 }
 293
 294 // ----------------------------------------------------------------------------
 295 // main frame
 296 // ----------------------------------------------------------------------------
 297
 298 // frame constructor
 299 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 300        : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size), m_textctrl(NULL)
 301 {
 302     m_fontSize = wxNORMAL_FONT->GetPointSize();
 303
 304     SetIcon(wxICON(sample));
 305
 306     // create a menu bar
 307     wxMenu *menuFile = new wxMenu;
 308
 309     menuFile->Append(Font_TestTextValue, wxT("&Test text value"),
 310                      wxT("Verify that getting and setting text value doesn't change it"));
 311     menuFile->Append(Font_ViewMsg, wxT("&View...\tCtrl-V"),
 312                      wxT("View an email message file"));
 313     menuFile->AppendSeparator();
 314     menuFile->Append(Font_About, wxT("&About\tCtrl-A"), wxT("Show about dialog"));
 315     menuFile->AppendSeparator();
 316     menuFile->Append(Font_Quit, wxT("E&xit\tAlt-X"), wxT("Quit this program"));
 317
 318     wxMenu *menuFont = new wxMenu;
 319     menuFont->Append(Font_IncSize, wxT("&Increase font size by 2 points\tCtrl-I"));
 320     menuFont->Append(Font_DecSize, wxT("&Decrease font size by 2 points\tCtrl-D"));
 321     menuFont->AppendSeparator();
 322     menuFont->AppendCheckItem(Font_Bold, wxT("&Bold\tCtrl-B"), wxT("Toggle bold state"));
 323     menuFont->AppendCheckItem(Font_Light, wxT("&Light\tCtrl-L"), wxT("Toggle light state"));
 324     menuFont->AppendSeparator();
 325     menuFont->AppendCheckItem(Font_Italic, wxT("&Oblique\tCtrl-O"), wxT("Toggle italic state"));
 326 #ifndef __WXMSW__
 327     // under wxMSW slant == italic so there's no reason to provide another menu item for the same thing
 328     menuFont->AppendCheckItem(Font_Slant, wxT("&Slant\tCtrl-S"), wxT("Toggle slant state"));
 329 #endif
 330     menuFont->AppendSeparator();
 331     menuFont->AppendCheckItem(Font_Underlined, wxT("&Underlined\tCtrl-U"),
 332                               wxT("Toggle underlined state"));
 333
 334     menuFont->AppendSeparator();
 335     menuFont->Append(Font_SetNativeDesc,
 336                      wxT("Set native font &description\tShift-Ctrl-D"));
 337     menuFont->Append(Font_SetNativeUserDesc,
 338                      wxT("Set &user font description\tShift-Ctrl-U"));
 339     menuFont->AppendSeparator();
 340     menuFont->Append(Font_SetFamily, wxT("Set font family"));
 341     menuFont->Append(Font_SetFaceName, wxT("Set font face name"));
 342     menuFont->Append(Font_SetEncoding, wxT("Set font &encoding\tShift-Ctrl-E"));
 343
 344     wxMenu *menuSelect = new wxMenu;
 345     menuSelect->Append(Font_Choose, wxT("&Select font...\tCtrl-S"),
 346                        wxT("Select a standard font"));
 347
 348     wxMenu *menuStdFonts = new wxMenu;
 349     menuStdFonts->Append(Font_wxNORMAL_FONT, wxT("wxNORMAL_FONT"), wxT("Normal font used by wxWidgets"));
 350     menuStdFonts->Append(Font_wxSMALL_FONT,  wxT("wxSMALL_FONT"),  wxT("Small font used by wxWidgets"));
 351     menuStdFonts->Append(Font_wxITALIC_FONT, wxT("wxITALIC_FONT"), wxT("Italic font used by wxWidgets"));
 352     menuStdFonts->Append(Font_wxSWISS_FONT,  wxT("wxSWISS_FONT"),  wxT("Swiss font used by wxWidgets"));
 353     menuSelect->Append(Font_Standard, wxT("Standar&d fonts"), menuStdFonts);
 354
 355     wxMenu *menuSettingFonts = new wxMenu;
 356     menuSettingFonts->Append(Font_wxSYS_OEM_FIXED_FONT, wxT("wxSYS_OEM_FIXED_FONT"),
 357                          wxT("Original equipment manufacturer dependent fixed-pitch font."));
 358     menuSettingFonts->Append(Font_wxSYS_ANSI_FIXED_FONT,  wxT("wxSYS_ANSI_FIXED_FONT"),
 359                          wxT("Windows fixed-pitch (monospaced) font. "));
 360     menuSettingFonts->Append(Font_wxSYS_ANSI_VAR_FONT, wxT("wxSYS_ANSI_VAR_FONT"),
 361                          wxT("Windows variable-pitch (proportional) font."));
 362     menuSettingFonts->Append(Font_wxSYS_SYSTEM_FONT,  wxT("wxSYS_SYSTEM_FONT"),
 363                          wxT("System font."));
 364     menuSettingFonts->Append(Font_wxSYS_DEVICE_DEFAULT_FONT,  wxT("wxSYS_DEVICE_DEFAULT_FONT"),
 365                          wxT("Device-dependent font."));
 366     menuSettingFonts->Append(Font_wxSYS_DEFAULT_GUI_FONT,  wxT("wxSYS_DEFAULT_GUI_FONT"),
 367                          wxT("Default font for user interface objects such as menus and dialog boxes. "));
 368     menuSelect->Append(Font_SystemSettings, wxT("System fonts"), menuSettingFonts);
 369
 370
 371     menuSelect->AppendSeparator();
 372     menuSelect->Append(Font_EnumFamilies, wxT("Enumerate font &families\tCtrl-F"));
 373     menuSelect->Append(Font_EnumFixedFamilies,
 374                      wxT("Enumerate fi&xed font families\tCtrl-X"));
 375     menuSelect->Append(Font_EnumEncodings,
 376                      wxT("Enumerate &encodings\tCtrl-E"));
 377     menuSelect->Append(Font_EnumFamiliesForEncoding,
 378                      wxT("Find font for en&coding...\tCtrl-C"),
 379                      wxT("Find font families for given encoding"));
 380
 381     // now append the freshly created menu to the menu bar...
 382     wxMenuBar *menuBar = new wxMenuBar;
 383     menuBar->Append(menuFile, wxT("&File"));
 384     menuBar->Append(menuFont, wxT("F&ont"));
 385     menuBar->Append(menuSelect, wxT("&Select"));
 386
 387     // ... and attach this menu bar to the frame
 388     SetMenuBar(menuBar);
 389
 390     wxSplitterWindow *splitter = new wxSplitterWindow(this);
 391
 392     m_textctrl = new wxTextCtrl(splitter, wxID_ANY,
 393                                 wxT("Paste text here to see how it looks\nlike in the given font"),
 394                                 wxDefaultPosition, wxDefaultSize,
 395                                 wxTE_MULTILINE);
 396
 397     m_canvas = new MyCanvas(splitter);
 398
 399     splitter->SplitHorizontally(m_textctrl, m_canvas, 100);
 400
 401 #if wxUSE_STATUSBAR
 402     // create a status bar just for fun (by default with 1 pane only)
 403     CreateStatusBar();
 404     SetStatusText(wxT("Welcome to wxWidgets font demo!"));
 405 #endif // wxUSE_STATUSBAR
 406 }
 407
 408 // --------------------------------------------------------
 409
 410 class MyEncodingEnumerator : public wxFontEnumerator
 411 {
 412 public:
 413     MyEncodingEnumerator()
 414         { m_n = 0; }
 415
 416     const wxString& GetText() const
 417         { return m_text; }
 418
 419 protected:
 420     virtual bool OnFontEncoding(const wxString& facename,
 421                                 const wxString& encoding)
 422     {
 423         wxString text;
 424         text.Printf(wxT("Encoding %u: %s (available in facename '%s')\n"),
 425                     (unsigned int) ++m_n, encoding.c_str(), facename.c_str());
 426         m_text += text;
 427         return true;
 428     }
 429
 430 private:
 431     size_t m_n;
 432     wxString m_text;
 433 };
 434
 435 void MyFrame::OnEnumerateEncodings(wxCommandEvent& WXUNUSED(event))
 436 {
 437     MyEncodingEnumerator fontEnumerator;
 438
 439     fontEnumerator.EnumerateEncodings();
 440
 441     wxLogMessage(wxT("Enumerating all available encodings:\n%s"),
 442                  fontEnumerator.GetText().c_str());
 443 }
 444
 445 // -------------------------------------------------------------
 446
 447 class MyFontEnumerator : public wxFontEnumerator
 448 {
 449 public:
 450     bool GotAny() const
 451         { return !m_facenames.IsEmpty(); }
 452
 453     const wxArrayString& GetFacenames() const
 454         { return m_facenames; }
 455
 456 protected:
 457     virtual bool OnFacename(const wxString& facename)
 458     {
 459         m_facenames.Add(facename);
 460         return true;
 461     }
 462
 463     private:
 464         wxArrayString m_facenames;
 465 } fontEnumerator;
 466
 467 bool MyFrame::DoEnumerateFamilies(bool fixedWidthOnly,
 468                                   wxFontEncoding encoding,
 469                                   bool silent)
 470 {
 471     MyFontEnumerator fontEnumerator;
 472
 473     fontEnumerator.EnumerateFacenames(encoding, fixedWidthOnly);
 474
 475     if ( fontEnumerator.GotAny() )
 476     {
 477         int nFacenames = fontEnumerator.GetFacenames().GetCount();
 478         if ( !silent )
 479         {
 480             wxLogStatus(this, wxT("Found %d %sfonts"),
 481                         nFacenames, fixedWidthOnly ? wxT("fixed width ") : wxT(""));
 482         }
 483
 484         wxString facename;
 485
 486         if ( silent )
 487         {
 488             // choose the first
 489             facename = fontEnumerator.GetFacenames().Item(0);
 490         }
 491         else
 492         {
 493             // let the user choose
 494             wxString *facenames = new wxString[nFacenames];
 495             int n;
 496             for ( n = 0; n < nFacenames; n++ )
 497                 facenames[n] = fontEnumerator.GetFacenames().Item(n);
 498
 499             n = wxGetSingleChoiceIndex
 500                 (
 501                     wxT("Choose a facename"),
 502                     SAMPLE_TITLE,
 503                     nFacenames,
 504                     facenames,
 505                     this
 506                 );
 507
 508             if ( n != -1 )
 509                 facename = facenames[n];
 510
 511             delete [] facenames;
 512         }
 513
 514         if ( !facename.empty() )
 515         {
 516             wxFont font(wxNORMAL_FONT->GetPointSize(),
 517                         wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL,
 518                         wxFONTWEIGHT_NORMAL, false, facename, encoding);
 519
 520             DoChangeFont(font);
 521         }
 522
 523         return true;
 524     }
 525     else if ( !silent )
 526     {
 527         wxLogWarning(wxT("No such fonts found."));
 528     }
 529
 530     return false;
 531 }
 532
 533 void MyFrame::OnEnumerateFamiliesForEncoding(wxCommandEvent& WXUNUSED(event))
 534 {
 535     wxFontEncoding enc = GetEncodingFromUser();
 536     if ( enc != wxFONTENCODING_SYSTEM )
 537     {
 538         DoEnumerateFamilies(false, enc);
 539     }
 540 }
 541
 542 void MyFrame::OnSetNativeDesc(wxCommandEvent& WXUNUSED(event))
 543 {
 544     wxString fontInfo = wxGetTextFromUser
 545                         (
 546                             wxT("Enter native font string"),
 547                             wxT("Input font description"),
 548                             m_canvas->GetTextFont().GetNativeFontInfoDesc(),
 549                             this
 550                         );
 551     if ( fontInfo.empty() )
 552         return;     // user clicked "Cancel" - do nothing
 553
 554     wxFont font;
 555     font.SetNativeFontInfo(fontInfo);
 556     if ( !font.IsOk() )
 557     {
 558         wxLogError(wxT("Font info string \"%s\" is invalid."),
 559                    fontInfo.c_str());
 560         return;
 561     }
 562
 563     DoChangeFont(font);
 564 }
 565
 566 void MyFrame::OnSetNativeUserDesc(wxCommandEvent& WXUNUSED(event))
 567 {
 568     wxString fontdesc = GetCanvas()->GetTextFont().GetNativeFontInfoUserDesc();
 569     wxString fontUserInfo = wxGetTextFromUser(
 570             wxT("Here you can edit current font description"),
 571             wxT("Input font description"), fontdesc,
 572             this);
 573     if (fontUserInfo.IsEmpty())
 574         return;     // user clicked "Cancel" - do nothing
 575
 576     wxFont font;
 577     if (font.SetNativeFontInfoUserDesc(fontUserInfo))
 578     {
 579         wxASSERT_MSG(font.IsOk(), wxT("The font should now be valid"));
 580         DoChangeFont(font);
 581     }
 582     else
 583     {
 584         wxASSERT_MSG(!font.IsOk(), wxT("The font should now be invalid"));
 585         wxMessageBox(wxT("Error trying to create a font with such description..."));
 586     }
 587 }
 588
 589 void MyFrame::OnSetFamily(wxCommandEvent& WXUNUSED(event))
 590 {
 591     wxFontFamily f = GetFamilyFromUser();
 592
 593     wxFont font = m_canvas->GetTextFont();
 594     font.SetFamily(f);
 595     DoChangeFont(font);
 596 }
 597
 598 void MyFrame::OnSetFaceName(wxCommandEvent& WXUNUSED(event))
 599 {
 600     wxString facename = GetCanvas()->GetTextFont().GetFaceName();
 601     wxString newFaceName = wxGetTextFromUser(
 602             wxT("Here you can edit current font face name."),
 603             wxT("Input font facename"), facename,
 604             this);
 605     if (newFaceName.IsEmpty())
 606         return;     // user clicked "Cancel" - do nothing
 607
 608     wxFont font(GetCanvas()->GetTextFont());
 609     if (font.SetFaceName(newFaceName))      // change facename only
 610     {
 611         wxASSERT_MSG(font.IsOk(), wxT("The font should now be valid"));
 612         DoChangeFont(font);
 613     }
 614     else
 615     {
 616         wxASSERT_MSG(!font.IsOk(), wxT("The font should now be invalid"));
 617         wxMessageBox(wxT("There is no font with such face name..."),
 618                      wxT("Invalid face name"), wxOK|wxICON_ERROR, this);
 619     }
 620 }
 621
 622 void MyFrame::OnSetEncoding(wxCommandEvent& WXUNUSED(event))
 623 {
 624     wxFontEncoding enc = GetEncodingFromUser();
 625     if ( enc == wxFONTENCODING_SYSTEM )
 626         return;
 627
 628     wxFont font = m_canvas->GetTextFont();
 629     font.SetEncoding(enc);
 630     DoChangeFont(font);
 631 }
 632
 633 wxFontEncoding MyFrame::GetEncodingFromUser()
 634 {
 635     wxArrayString names;
 636     wxArrayInt encodings;
 637
 638     const size_t count = wxFontMapper::GetSupportedEncodingsCount();
 639     names.reserve(count);
 640     encodings.reserve(count);
 641
 642     for ( size_t n = 0; n < count; n++ )
 643     {
 644         wxFontEncoding enc = wxFontMapper::GetEncoding(n);
 645         encodings.push_back(enc);
 646         names.push_back(wxFontMapper::GetEncodingName(enc));
 647     }
 648
 649     int i = wxGetSingleChoiceIndex
 650             (
 651                 wxT("Choose the encoding"),
 652                 SAMPLE_TITLE,
 653                 names,
 654                 this
 655             );
 656
 657     return i == -1 ? wxFONTENCODING_SYSTEM : (wxFontEncoding)encodings[i];
 658 }
 659
 660 wxFontFamily MyFrame::GetFamilyFromUser()
 661 {
 662     wxArrayString names;
 663     wxArrayInt families;
 664
 665     families.push_back(wxFONTFAMILY_DECORATIVE);
 666     families.push_back(wxFONTFAMILY_ROMAN);
 667     families.push_back(wxFONTFAMILY_SCRIPT);
 668     families.push_back(wxFONTFAMILY_SWISS);
 669     families.push_back(wxFONTFAMILY_MODERN);
 670     families.push_back(wxFONTFAMILY_TELETYPE);
 671
 672     names.push_back("DECORATIVE");
 673     names.push_back("ROMAN");
 674     names.push_back("SCRIPT");
 675     names.push_back("SWISS");
 676     names.push_back("MODERN");
 677     names.push_back("TELETYPE");
 678
 679     int i = wxGetSingleChoiceIndex
 680             (
 681                 wxT("Choose the family"),
 682                 SAMPLE_TITLE,
 683                 names,
 684                 this
 685             );
 686
 687     return i == -1 ? wxFONTFAMILY_DEFAULT : (wxFontFamily)families[i];
 688 }
 689
 690 void MyFrame::DoResizeFont(int diff)
 691 {
 692     wxFont font = m_canvas->GetTextFont();
 693
 694     font.SetPointSize(font.GetPointSize() + diff);
 695     DoChangeFont(font);
 696 }
 697
 698 void MyFrame::OnBold(wxCommandEvent& event)
 699 {
 700     wxFont font = m_canvas->GetTextFont();
 701
 702     font.SetWeight(event.IsChecked() ? wxFONTWEIGHT_BOLD : wxFONTWEIGHT_NORMAL);
 703     DoChangeFont(font);
 704 }
 705
 706 void MyFrame::OnLight(wxCommandEvent& event)
 707 {
 708     wxFont font = m_canvas->GetTextFont();
 709
 710     font.SetWeight(event.IsChecked() ? wxFONTWEIGHT_LIGHT : wxFONTWEIGHT_NORMAL);
 711     DoChangeFont(font);
 712 }
 713
 714 void MyFrame::OnItalic(wxCommandEvent& event)
 715 {
 716     wxFont font = m_canvas->GetTextFont();
 717
 718     font.SetStyle(event.IsChecked() ? wxFONTSTYLE_ITALIC : wxFONTSTYLE_NORMAL);
 719     DoChangeFont(font);
 720 }
 721
 722 void MyFrame::OnSlant(wxCommandEvent& event)
 723 {
 724     wxFont font = m_canvas->GetTextFont();
 725
 726     font.SetStyle(event.IsChecked() ? wxFONTSTYLE_SLANT : wxFONTSTYLE_NORMAL);
 727     DoChangeFont(font);
 728 }
 729
 730 void MyFrame::OnUnderline(wxCommandEvent& event)
 731 {
 732     wxFont font = m_canvas->GetTextFont();
 733
 734     font.SetUnderlined(event.IsChecked());
 735     DoChangeFont(font);
 736 }
 737
 738 void MyFrame::OnwxPointerFont(wxCommandEvent& event)
 739 {
 740     wxFont font;
 741
 742     switch ( event.GetId() )
 743     {
 744         case Font_wxNORMAL_FONT:
 745             font = *wxNORMAL_FONT;
 746             break;
 747
 748         case Font_wxSMALL_FONT:
 749             font = *wxSMALL_FONT;
 750             break;
 751
 752         case Font_wxITALIC_FONT:
 753             font = *wxITALIC_FONT;
 754             break;
 755
 756         case Font_wxSWISS_FONT:
 757             font = *wxSWISS_FONT;
 758             break;
 759
 760         default:
 761             wxFAIL_MSG( wxT("unknown standard font") );
 762             return;
 763     }
 764
 765     DoChangeFont(font);
 766 }
 767
 768 void MyFrame::OnwxSystemSettingsFont(wxCommandEvent& event)
 769 {
 770     wxFont font;
 771
 772     switch ( event.GetId() )
 773     {
 774         case Font_wxSYS_OEM_FIXED_FONT:
 775             font = wxSystemSettings::GetFont(wxSYS_OEM_FIXED_FONT);
 776             break;
 777
 778         case Font_wxSYS_ANSI_FIXED_FONT:
 779             font = wxSystemSettings::GetFont(wxSYS_ANSI_FIXED_FONT);
 780             break;
 781
 782         case Font_wxSYS_ANSI_VAR_FONT:
 783             font = wxSystemSettings::GetFont(wxSYS_ANSI_VAR_FONT);
 784             break;
 785
 786         case Font_wxSYS_SYSTEM_FONT:
 787             font = wxSystemSettings::GetFont(wxSYS_SYSTEM_FONT);
 788             break;
 789
 790         case Font_wxSYS_DEVICE_DEFAULT_FONT:
 791             font = wxSystemSettings::GetFont(wxSYS_DEVICE_DEFAULT_FONT);
 792             break;
 793
 794         case Font_wxSYS_DEFAULT_GUI_FONT:
 795             font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
 796             break;
 797
 798         default:
 799             wxFAIL_MSG( wxT("unknown standard font") );
 800             return;
 801     }
 802
 803     DoChangeFont(font);
 804 }
 805
 806 void MyFrame::DoChangeFont(const wxFont& font, const wxColour& col)
 807 {
 808     m_canvas->SetTextFont(font);
 809     if ( col.IsOk() )
 810         m_canvas->SetColour(col);
 811     m_canvas->Refresh();
 812
 813     m_textctrl->SetFont(font);
 814     if ( col.IsOk() )
 815         m_textctrl->SetForegroundColour(col);
 816
 817     // update the state of the bold/italic/underlined menu items
 818     wxMenuBar *mbar = GetMenuBar();
 819     if ( mbar )
 820     {
 821         mbar->Check(Font_Light, font.GetWeight() == wxFONTWEIGHT_LIGHT);
 822         mbar->Check(Font_Bold, font.GetWeight() == wxFONTWEIGHT_BOLD);
 823
 824         mbar->Check(Font_Italic, font.GetStyle() == wxFONTSTYLE_ITALIC);
 825 #ifndef __WXMSW__
 826         mbar->Check(Font_Slant, font.GetStyle() == wxFONTSTYLE_SLANT);
 827 #endif
 828
 829         mbar->Check(Font_Underlined, font.GetUnderlined());
 830     }
 831 }
 832
 833 void MyFrame::OnSelectFont(wxCommandEvent& WXUNUSED(event))
 834 {
 835     wxFontData data;
 836     data.SetInitialFont(m_canvas->GetTextFont());
 837     data.SetColour(m_canvas->GetColour());
 838
 839     wxFontDialog dialog(this, data);
 840     if ( dialog.ShowModal() == wxID_OK )
 841     {
 842         wxFontData retData = dialog.GetFontData();
 843         wxFont font = retData.GetChosenFont();
 844         wxColour colour = retData.GetColour();
 845
 846         DoChangeFont(font, colour);
 847     }
 848 }
 849
 850 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 851 {
 852     // true is to force the frame to close
 853     Close(true);
 854 }
 855
 856 void MyFrame::OnTestTextValue(wxCommandEvent& WXUNUSED(event))
 857 {
 858     wxString value = m_textctrl->GetValue();
 859     m_textctrl->SetValue(value);
 860     if ( m_textctrl->GetValue() != value )
 861     {
 862         wxLogError(wxT("Text value changed after getting and setting it"));
 863     }
 864 }
 865
 866 void MyFrame::OnViewMsg(wxCommandEvent& WXUNUSED(event))
 867 {
 868 #if wxUSE_FILEDLG
 869     // first, choose the file
 870     static wxString s_dir, s_file;
 871     wxFileDialog dialog(this, wxT("Open an email message file"),
 872                         s_dir, s_file);
 873     if ( dialog.ShowModal() != wxID_OK )
 874         return;
 875
 876     // save for the next time
 877     s_dir = dialog.GetDirectory();
 878     s_file = dialog.GetFilename();
 879
 880     wxString filename = dialog.GetPath();
 881
 882     // load it and search for Content-Type header
 883     wxTextFile file(filename);
 884     if ( !file.Open() )
 885         return;
 886
 887     wxString charset;
 888
 889     static const wxChar *prefix = wxT("Content-Type: text/plain; charset=");
 890     const size_t len = wxStrlen(prefix);
 891
 892     size_t n, count = file.GetLineCount();
 893     for ( n = 0; n < count; n++ )
 894     {
 895         wxString line = file[n];
 896
 897         if ( !line )
 898         {
 899             // if it is an email message, headers are over, no need to parse
 900             // all the file
 901             break;
 902         }
 903
 904         if ( line.Left(len) == prefix )
 905         {
 906             // found!
 907             const wxChar *pc = line.c_str() + len;
 908             if ( *pc == wxT('"') )
 909                 pc++;
 910
 911             while ( *pc && *pc != wxT('"') )
 912             {
 913                 charset += *pc++;
 914             }
 915
 916             break;
 917         }
 918     }
 919
 920     if ( !charset )
 921     {
 922         wxLogError(wxT("The file '%s' doesn't contain charset information."),
 923                    filename.c_str());
 924
 925         return;
 926     }
 927
 928     // ok, now get the corresponding encoding
 929     wxFontEncoding fontenc = wxFontMapper::Get()->CharsetToEncoding(charset);
 930     if ( fontenc == wxFONTENCODING_SYSTEM )
 931     {
 932         wxLogError(wxT("Charset '%s' is unsupported."), charset.c_str());
 933         return;
 934     }
 935
 936     m_textctrl->LoadFile(filename);
 937
 938     if ( fontenc == wxFONTENCODING_UTF8 ||
 939             !wxFontMapper::Get()->IsEncodingAvailable(fontenc) )
 940     {
 941         // try to find some similar encoding:
 942         wxFontEncoding encAlt;
 943         if ( wxFontMapper::Get()->GetAltForEncoding(fontenc, &encAlt) )
 944         {
 945             wxEncodingConverter conv;
 946
 947             if (conv.Init(fontenc, encAlt))
 948             {
 949                 fontenc = encAlt;
 950                 m_textctrl -> SetValue(conv.Convert(m_textctrl -> GetValue()));
 951             }
 952             else
 953             {
 954                 wxLogWarning(wxT("Cannot convert from '%s' to '%s'."),
 955                              wxFontMapper::GetEncodingDescription(fontenc).c_str(),
 956                              wxFontMapper::GetEncodingDescription(encAlt).c_str());
 957             }
 958         }
 959         else
 960             wxLogWarning(wxT("No fonts for encoding '%s' on this system."),
 961                          wxFontMapper::GetEncodingDescription(fontenc).c_str());
 962     }
 963
 964     // and now create the correct font
 965     if ( !DoEnumerateFamilies(false, fontenc, true /* silent */) )
 966     {
 967         wxFont font(wxNORMAL_FONT->GetPointSize(),
 968                     wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL,
 969                     wxFONTWEIGHT_NORMAL, false /* !underlined */,
 970                     wxEmptyString /* facename */, fontenc);
 971         if ( font.IsOk() )
 972         {
 973             DoChangeFont(font);
 974         }
 975         else
 976         {
 977             wxLogWarning(wxT("No fonts for encoding '%s' on this system."),
 978                          wxFontMapper::GetEncodingDescription(fontenc).c_str());
 979         }
 980     }
 981 #endif // wxUSE_FILEDLG
 982 }
 983
 984 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 985 {
 986     wxMessageBox(wxT("wxWidgets font sample\n")
 987                  wxT("(c) 1999-2006 Vadim Zeitlin"),
 988                  wxString(wxT("About ")) + SAMPLE_TITLE,
 989                  wxOK | wxICON_INFORMATION, this);
 990 }
 991
 992 // ----------------------------------------------------------------------------
 993 // MyCanvas
 994 // ----------------------------------------------------------------------------
 995
 996 BEGIN_EVENT_TABLE(MyCanvas, wxWindow)
 997     EVT_PAINT(MyCanvas::OnPaint)
 998 END_EVENT_TABLE()
 999
1000 MyCanvas::MyCanvas( wxWindow *parent )
1001         : wxWindow( parent, wxID_ANY ),
1002           m_colour(*wxRED), m_font(*wxNORMAL_FONT)
1003 {
1004 }
1005
1006 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
1007 {
1008     wxPaintDC dc(this);
1009     PrepareDC(dc);
1010
1011     // set background
1012     dc.SetBackground(wxBrush(wxT("white"), wxSOLID));
1013     dc.Clear();
1014     dc.SetFont(m_font);
1015
1016     // one text line height
1017     wxCoord hLine = dc.GetCharHeight();
1018
1019     // the current text origin
1020     wxCoord x = 5,
1021             y = 5;
1022
1023     // output the font name/info
1024     wxString fontInfo;
1025
1026     fontInfo.Printf(wxT("Face name: %s, family: %s"),
1027                     m_font.GetFaceName().c_str(),
1028                     m_font.GetFamilyString().c_str());
1029
1030     dc.DrawText(fontInfo, x, y);
1031     y += hLine;
1032
1033     fontInfo.Printf(wxT("Size: %d points or %d pixels; %d*%d average char size"),
1034                     m_font.GetPointSize(),
1035                     m_font.GetPixelSize().y,
1036                     dc.GetCharWidth(), dc.GetCharHeight());
1037
1038     dc.DrawText(fontInfo, x, y);
1039     y += hLine;
1040
1041     fontInfo.Printf(wxT("Style: %s, weight: %s, fixed width: %s, encoding: %s"),
1042                     m_font.GetStyleString().c_str(),
1043                     m_font.GetWeightString().c_str(),
1044                     m_font.IsFixedWidth() ? wxT("yes") : wxT("no"),
1045                     wxFontMapper::GetEncodingDescription(m_font.GetEncoding()));
1046
1047     dc.DrawText(fontInfo, x, y);
1048     y += hLine;
1049
1050     if ( m_font.IsOk() )
1051     {
1052         const wxNativeFontInfo *info = m_font.GetNativeFontInfo();
1053         if ( info )
1054         {
1055             wxString fontDesc = m_font.GetNativeFontInfoUserDesc();
1056             fontInfo.Printf(wxT("Native font info: %s"), fontDesc.c_str());
1057
1058             dc.DrawText(fontInfo, x, y);
1059             y += hLine;
1060         }
1061     }
1062
1063     y += hLine;
1064
1065     // prepare to draw the font
1066     dc.SetTextForeground(m_colour);
1067
1068     // the size of one cell (Normally biggest char + small margin)
1069     wxCoord maxCharWidth, maxCharHeight;
1070     dc.GetTextExtent(wxT("W"), &maxCharWidth, &maxCharHeight);
1071     int w = maxCharWidth + 5,
1072         h = maxCharHeight + 4;
1073
1074
1075     // print all font symbols from 32 to 256 in 7 rows of 32 chars each
1076     for ( int i = 0; i < 7; i++ )
1077     {
1078         for ( int j = 0; j < 32; j++ )
1079         {
1080             wxChar c = (wxChar)(32 * (i + 1) + j);
1081
1082             wxCoord charWidth, charHeight;
1083             dc.GetTextExtent(c, &charWidth, &charHeight);
1084             dc.DrawText
1085             (
1086                 c,
1087                 x + w*j + (maxCharWidth - charWidth) / 2 + 1,
1088                 y + h*i + (maxCharHeight - charHeight) / 2
1089             );
1090         }
1091     }
1092
1093     // draw the lines between them
1094     dc.SetPen(wxPen(wxColour(wxT("blue")), 1, wxSOLID));
1095     int l;
1096
1097     // horizontal
1098     for ( l = 0; l < 8; l++ )
1099     {
1100         int yl = y + h*l - 2;
1101         dc.DrawLine(x - 2, yl, x + 32*w - 1, yl);
1102     }
1103
1104     // and vertical
1105     for ( l = 0; l < 33; l++ )
1106     {
1107         int xl = x + w*l - 2;
1108         dc.DrawLine(xl, y - 2, xl, y + 7*h - 1);
1109     }
1110 }