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[] = _T("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 and tell the application that it's our main window
 286     frame->Show(true);
 287     SetTopWindow(frame);
 288
 289     // success: wxApp::OnRun() will be called which will enter the main message
 290     // loop and the application will run. If we returned 'false' here, the
 291     // application would exit immediately.
 292     return true;
 293 }
 294
 295 // ----------------------------------------------------------------------------
 296 // main frame
 297 // ----------------------------------------------------------------------------
 298
 299 // frame constructor
 300 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 301        : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size), m_textctrl(NULL)
 302 {
 303     m_fontSize = wxNORMAL_FONT->GetPointSize();
 304
 305     SetIcon(wxIcon(sample_xpm));
 306
 307     // create a menu bar
 308     wxMenu *menuFile = new wxMenu;
 309
 310     menuFile->Append(Font_TestTextValue, wxT("&Test text value"),
 311                      wxT("Verify that getting and setting text value doesn't change it"));
 312     menuFile->Append(Font_ViewMsg, wxT("&View...\tCtrl-V"),
 313                      wxT("View an email message file"));
 314     menuFile->AppendSeparator();
 315     menuFile->Append(Font_About, wxT("&About...\tCtrl-A"), wxT("Show about dialog"));
 316     menuFile->AppendSeparator();
 317     menuFile->Append(Font_Quit, wxT("E&xit\tAlt-X"), wxT("Quit this program"));
 318
 319     wxMenu *menuFont = new wxMenu;
 320     menuFont->Append(Font_IncSize, wxT("&Increase font size by 2 points\tCtrl-I"));
 321     menuFont->Append(Font_DecSize, wxT("&Decrease font size by 2 points\tCtrl-D"));
 322     menuFont->AppendSeparator();
 323     menuFont->AppendCheckItem(Font_Bold, wxT("&Bold\tCtrl-B"), wxT("Toggle bold state"));
 324     menuFont->AppendCheckItem(Font_Light, wxT("&Light\tCtrl-L"), wxT("Toggle light state"));
 325     menuFont->AppendSeparator();
 326     menuFont->AppendCheckItem(Font_Italic, wxT("&Oblique\tCtrl-O"), wxT("Toggle italic state"));
 327     menuFont->AppendCheckItem(Font_Slant, wxT("&Slant\tCtrl-S"), wxT("Toggle slant state"));
 328     menuFont->AppendSeparator();
 329     menuFont->AppendCheckItem(Font_Underlined, wxT("&Underlined\tCtrl-U"),
 330                               wxT("Toggle underlined state"));
 331
 332     menuFont->AppendSeparator();
 333     menuFont->Append(Font_SetNativeDesc,
 334                      wxT("Set native font &description\tShift-Ctrl-D"));
 335     menuFont->Append(Font_SetNativeUserDesc,
 336                      wxT("Set &user font description\tShift-Ctrl-U"));
 337     menuFont->AppendSeparator();
 338     menuFont->Append(Font_SetFamily, wxT("Set font family"));
 339     menuFont->Append(Font_SetFaceName, wxT("Set font face name"));
 340     menuFont->Append(Font_SetEncoding, wxT("Set font &encoding\tShift-Ctrl-E"));
 341
 342     wxMenu *menuSelect = new wxMenu;
 343     menuSelect->Append(Font_Choose, wxT("&Select font...\tCtrl-S"),
 344                        wxT("Select a standard font"));
 345
 346     wxMenu *menuStdFonts = new wxMenu;
 347     menuStdFonts->Append(Font_wxNORMAL_FONT, wxT("wxNORMAL_FONT"), wxT("Normal font used by wxWidgets"));
 348     menuStdFonts->Append(Font_wxSMALL_FONT,  wxT("wxSMALL_FONT"),  wxT("Small font used by wxWidgets"));
 349     menuStdFonts->Append(Font_wxITALIC_FONT, wxT("wxITALIC_FONT"), wxT("Italic font used by wxWidgets"));
 350     menuStdFonts->Append(Font_wxSWISS_FONT,  wxT("wxSWISS_FONT"),  wxT("Swiss font used by wxWidgets"));
 351     menuSelect->Append(Font_Standard, wxT("Standar&d fonts"), menuStdFonts);
 352
 353     wxMenu *menuSettingFonts = new wxMenu;
 354     menuSettingFonts->Append(Font_wxSYS_OEM_FIXED_FONT, wxT("wxSYS_OEM_FIXED_FONT"),
 355                          wxT("Original equipment manufacturer dependent fixed-pitch font."));
 356     menuSettingFonts->Append(Font_wxSYS_ANSI_FIXED_FONT,  wxT("wxSYS_ANSI_FIXED_FONT"),
 357                          wxT("Windows fixed-pitch (monospaced) font. "));
 358     menuSettingFonts->Append(Font_wxSYS_ANSI_VAR_FONT, wxT("wxSYS_ANSI_VAR_FONT"),
 359                          wxT("Windows variable-pitch (proportional) font."));
 360     menuSettingFonts->Append(Font_wxSYS_SYSTEM_FONT,  wxT("wxSYS_SYSTEM_FONT"),
 361                          wxT("System font."));
 362     menuSettingFonts->Append(Font_wxSYS_DEVICE_DEFAULT_FONT,  wxT("wxSYS_DEVICE_DEFAULT_FONT"),
 363                          wxT("Device-dependent font."));
 364     menuSettingFonts->Append(Font_wxSYS_DEFAULT_GUI_FONT,  wxT("wxSYS_DEFAULT_GUI_FONT"),
 365                          wxT("Default font for user interface objects such as menus and dialog boxes. "));
 366     menuSelect->Append(Font_SystemSettings, wxT("System fonts"), menuSettingFonts);
 367
 368
 369     menuSelect->AppendSeparator();
 370     menuSelect->Append(Font_EnumFamilies, wxT("Enumerate font &families\tCtrl-F"));
 371     menuSelect->Append(Font_EnumFixedFamilies,
 372                      wxT("Enumerate fi&xed font families\tCtrl-X"));
 373     menuSelect->Append(Font_EnumEncodings,
 374                      wxT("Enumerate &encodings\tCtrl-E"));
 375     menuSelect->Append(Font_EnumFamiliesForEncoding,
 376                      wxT("Find font for en&coding...\tCtrl-C"),
 377                      wxT("Find font families for given encoding"));
 378
 379     // now append the freshly created menu to the menu bar...
 380     wxMenuBar *menuBar = new wxMenuBar;
 381     menuBar->Append(menuFile, wxT("&File"));
 382     menuBar->Append(menuFont, wxT("F&ont"));
 383     menuBar->Append(menuSelect, wxT("&Select"));
 384
 385     // ... and attach this menu bar to the frame
 386     SetMenuBar(menuBar);
 387
 388     wxSplitterWindow *splitter = new wxSplitterWindow(this);
 389
 390     m_textctrl = new wxTextCtrl(splitter, wxID_ANY,
 391                                 wxT("Paste text here to see how it looks\nlike in the given font"),
 392                                 wxDefaultPosition, wxDefaultSize,
 393                                 wxTE_MULTILINE);
 394
 395     m_canvas = new MyCanvas(splitter);
 396
 397     splitter->SplitHorizontally(m_textctrl, m_canvas, 100);
 398
 399 #if wxUSE_STATUSBAR
 400     // create a status bar just for fun (by default with 1 pane only)
 401     CreateStatusBar();
 402     SetStatusText(wxT("Welcome to wxWidgets font demo!"));
 403 #endif // wxUSE_STATUSBAR
 404 }
 405
 406 // --------------------------------------------------------
 407
 408 class MyEncodingEnumerator : public wxFontEnumerator
 409 {
 410 public:
 411     MyEncodingEnumerator()
 412         { m_n = 0; }
 413
 414     const wxString& GetText() const
 415         { return m_text; }
 416
 417 protected:
 418     virtual bool OnFontEncoding(const wxString& facename,
 419                                 const wxString& encoding)
 420     {
 421         wxString text;
 422         text.Printf(wxT("Encoding %u: %s (available in facename '%s')\n"),
 423                     (unsigned int) ++m_n, encoding.c_str(), facename.c_str());
 424         m_text += text;
 425         return true;
 426     }
 427
 428 private:
 429     size_t m_n;
 430     wxString m_text;
 431 };
 432
 433 void MyFrame::OnEnumerateEncodings(wxCommandEvent& WXUNUSED(event))
 434 {
 435     MyEncodingEnumerator fontEnumerator;
 436
 437     fontEnumerator.EnumerateEncodings();
 438
 439     wxLogMessage(wxT("Enumerating all available encodings:\n%s"),
 440                  fontEnumerator.GetText().c_str());
 441 }
 442
 443 // -------------------------------------------------------------
 444
 445 class MyFontEnumerator : public wxFontEnumerator
 446 {
 447 public:
 448     bool GotAny() const
 449         { return !m_facenames.IsEmpty(); }
 450
 451     const wxArrayString& GetFacenames() const
 452         { return m_facenames; }
 453
 454 protected:
 455     virtual bool OnFacename(const wxString& facename)
 456     {
 457         m_facenames.Add(facename);
 458         return true;
 459     }
 460
 461     private:
 462         wxArrayString m_facenames;
 463 } fontEnumerator;
 464
 465 bool MyFrame::DoEnumerateFamilies(bool fixedWidthOnly,
 466                                   wxFontEncoding encoding,
 467                                   bool silent)
 468 {
 469     MyFontEnumerator fontEnumerator;
 470
 471     fontEnumerator.EnumerateFacenames(encoding, fixedWidthOnly);
 472
 473     if ( fontEnumerator.GotAny() )
 474     {
 475         int nFacenames = fontEnumerator.GetFacenames().GetCount();
 476         if ( !silent )
 477         {
 478             wxLogStatus(this, wxT("Found %d %sfonts"),
 479                         nFacenames, fixedWidthOnly ? wxT("fixed width ") : wxT(""));
 480         }
 481
 482         wxString facename;
 483
 484         if ( silent )
 485         {
 486             // choose the first
 487             facename = fontEnumerator.GetFacenames().Item(0);
 488         }
 489         else
 490         {
 491             // let the user choose
 492             wxString *facenames = new wxString[nFacenames];
 493             int n;
 494             for ( n = 0; n < nFacenames; n++ )
 495                 facenames[n] = fontEnumerator.GetFacenames().Item(n);
 496
 497             n = wxGetSingleChoiceIndex
 498                 (
 499                     wxT("Choose a facename"),
 500                     SAMPLE_TITLE,
 501                     nFacenames,
 502                     facenames,
 503                     this
 504                 );
 505
 506             if ( n != -1 )
 507                 facename = facenames[n];
 508
 509             delete [] facenames;
 510         }
 511
 512         if ( !facename.empty() )
 513         {
 514             wxFont font(wxNORMAL_FONT->GetPointSize(),
 515                         wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL,
 516                         wxFONTWEIGHT_NORMAL, false, facename, encoding);
 517
 518             DoChangeFont(font);
 519         }
 520
 521         return true;
 522     }
 523     else if ( !silent )
 524     {
 525         wxLogWarning(wxT("No such fonts found."));
 526     }
 527
 528     return false;
 529 }
 530
 531 void MyFrame::OnEnumerateFamiliesForEncoding(wxCommandEvent& WXUNUSED(event))
 532 {
 533     wxFontEncoding enc = GetEncodingFromUser();
 534     if ( enc != wxFONTENCODING_SYSTEM )
 535     {
 536         DoEnumerateFamilies(false, enc);
 537     }
 538 }
 539
 540 void MyFrame::OnSetNativeDesc(wxCommandEvent& WXUNUSED(event))
 541 {
 542     wxString fontInfo = wxGetTextFromUser
 543                         (
 544                             wxT("Enter native font string"),
 545                             wxT("Input font description"),
 546                             m_canvas->GetTextFont().GetNativeFontInfoDesc(),
 547                             this
 548                         );
 549     if ( fontInfo.empty() )
 550         return;     // user clicked "Cancel" - do nothing
 551
 552     wxFont font;
 553     font.SetNativeFontInfo(fontInfo);
 554     if ( !font.Ok() )
 555     {
 556         wxLogError(wxT("Font info string \"%s\" is invalid."),
 557                    fontInfo.c_str());
 558         return;
 559     }
 560
 561     DoChangeFont(font);
 562 }
 563
 564 void MyFrame::OnSetNativeUserDesc(wxCommandEvent& WXUNUSED(event))
 565 {
 566     wxString fontdesc = GetCanvas()->GetTextFont().GetNativeFontInfoUserDesc();
 567     wxString fontUserInfo = wxGetTextFromUser(
 568             wxT("Here you can edit current font description"),
 569             wxT("Input font description"), fontdesc,
 570             this);
 571     if (fontUserInfo.IsEmpty())
 572         return;     // user clicked "Cancel" - do nothing
 573
 574     wxFont font;
 575     if (font.SetNativeFontInfoUserDesc(fontUserInfo))
 576     {
 577         wxASSERT_MSG(font.Ok(), wxT("The font should now be valid"));
 578         DoChangeFont(font);
 579     }
 580     else
 581     {
 582         wxASSERT_MSG(!font.Ok(), wxT("The font should now be invalid"));
 583         wxMessageBox(wxT("Error trying to create a font with such description..."));
 584     }
 585 }
 586
 587 void MyFrame::OnSetFamily(wxCommandEvent& WXUNUSED(event))
 588 {
 589     wxFontFamily f = GetFamilyFromUser();
 590
 591     wxFont font = m_canvas->GetTextFont();
 592     font.SetFamily(f);
 593     DoChangeFont(font);
 594 }
 595
 596 void MyFrame::OnSetFaceName(wxCommandEvent& WXUNUSED(event))
 597 {
 598     wxString facename = GetCanvas()->GetTextFont().GetFaceName();
 599     wxString newFaceName = wxGetTextFromUser(
 600             wxT("Here you can edit current font face name."),
 601             wxT("Input font facename"), facename,
 602             this);
 603     if (newFaceName.IsEmpty())
 604         return;     // user clicked "Cancel" - do nothing
 605
 606     wxFont font(GetCanvas()->GetTextFont());
 607     if (font.SetFaceName(newFaceName))      // change facename only
 608     {
 609         wxASSERT_MSG(font.Ok(), wxT("The font should now be valid"));
 610         DoChangeFont(font);
 611     }
 612     else
 613     {
 614         wxASSERT_MSG(!font.Ok(), wxT("The font should now be invalid"));
 615         wxMessageBox(wxT("There is no font with such face name..."),
 616                      wxT("Invalid face name"), wxOK|wxICON_ERROR, this);
 617     }
 618 }
 619
 620 void MyFrame::OnSetEncoding(wxCommandEvent& WXUNUSED(event))
 621 {
 622     wxFontEncoding enc = GetEncodingFromUser();
 623     if ( enc == wxFONTENCODING_SYSTEM )
 624         return;
 625
 626     wxFont font = m_canvas->GetTextFont();
 627     font.SetEncoding(enc);
 628     DoChangeFont(font);
 629 }
 630
 631 wxFontEncoding MyFrame::GetEncodingFromUser()
 632 {
 633     wxArrayString names;
 634     wxArrayInt encodings;
 635
 636     const size_t count = wxFontMapper::GetSupportedEncodingsCount();
 637     names.reserve(count);
 638     encodings.reserve(count);
 639
 640     for ( size_t n = 0; n < count; n++ )
 641     {
 642         wxFontEncoding enc = wxFontMapper::GetEncoding(n);
 643         encodings.push_back(enc);
 644         names.push_back(wxFontMapper::GetEncodingName(enc));
 645     }
 646
 647     int i = wxGetSingleChoiceIndex
 648             (
 649                 wxT("Choose the encoding"),
 650                 SAMPLE_TITLE,
 651                 names,
 652                 this
 653             );
 654
 655     return i == -1 ? wxFONTENCODING_SYSTEM : (wxFontEncoding)encodings[i];
 656 }
 657
 658 wxFontFamily MyFrame::GetFamilyFromUser()
 659 {
 660     wxArrayString names;
 661     wxArrayInt families;
 662
 663     families.push_back(wxFONTFAMILY_DECORATIVE);
 664     families.push_back(wxFONTFAMILY_ROMAN);
 665     families.push_back(wxFONTFAMILY_SCRIPT);
 666     families.push_back(wxFONTFAMILY_SWISS);
 667     families.push_back(wxFONTFAMILY_MODERN);
 668     families.push_back(wxFONTFAMILY_TELETYPE);
 669
 670     names.push_back("DECORATIVE");
 671     names.push_back("ROMAN");
 672     names.push_back("SCRIPT");
 673     names.push_back("SWISS");
 674     names.push_back("MODERN");
 675     names.push_back("TELETYPE");
 676
 677     int i = wxGetSingleChoiceIndex
 678             (
 679                 wxT("Choose the family"),
 680                 SAMPLE_TITLE,
 681                 names,
 682                 this
 683             );
 684
 685     return i == -1 ? wxFONTFAMILY_DEFAULT : (wxFontFamily)families[i];
 686 }
 687
 688 void MyFrame::DoResizeFont(int diff)
 689 {
 690     wxFont font = m_canvas->GetTextFont();
 691
 692     font.SetPointSize(font.GetPointSize() + diff);
 693     DoChangeFont(font);
 694 }
 695
 696 void MyFrame::OnBold(wxCommandEvent& event)
 697 {
 698     wxFont font = m_canvas->GetTextFont();
 699
 700     font.SetWeight(event.IsChecked() ? wxFONTWEIGHT_BOLD : wxFONTWEIGHT_NORMAL);
 701     DoChangeFont(font);
 702 }
 703
 704 void MyFrame::OnLight(wxCommandEvent& event)
 705 {
 706     wxFont font = m_canvas->GetTextFont();
 707
 708     font.SetWeight(event.IsChecked() ? wxFONTWEIGHT_LIGHT : wxFONTWEIGHT_NORMAL);
 709     DoChangeFont(font);
 710 }
 711
 712 void MyFrame::OnItalic(wxCommandEvent& event)
 713 {
 714     wxFont font = m_canvas->GetTextFont();
 715
 716     font.SetStyle(event.IsChecked() ? wxFONTSTYLE_ITALIC : wxFONTSTYLE_NORMAL);
 717     DoChangeFont(font);
 718 }
 719
 720 void MyFrame::OnSlant(wxCommandEvent& event)
 721 {
 722     wxFont font = m_canvas->GetTextFont();
 723
 724     font.SetStyle(event.IsChecked() ? wxFONTSTYLE_SLANT : wxFONTSTYLE_NORMAL);
 725     DoChangeFont(font);
 726 }
 727
 728 void MyFrame::OnUnderline(wxCommandEvent& event)
 729 {
 730     wxFont font = m_canvas->GetTextFont();
 731
 732     font.SetUnderlined(event.IsChecked());
 733     DoChangeFont(font);
 734 }
 735
 736 void MyFrame::OnwxPointerFont(wxCommandEvent& event)
 737 {
 738     wxFont font;
 739
 740     switch ( event.GetId() )
 741     {
 742         case Font_wxNORMAL_FONT:
 743             font = *wxNORMAL_FONT;
 744             break;
 745
 746         case Font_wxSMALL_FONT:
 747             font = *wxSMALL_FONT;
 748             break;
 749
 750         case Font_wxITALIC_FONT:
 751             font = *wxITALIC_FONT;
 752             break;
 753
 754         case Font_wxSWISS_FONT:
 755             font = *wxSWISS_FONT;
 756             break;
 757
 758         default:
 759             wxFAIL_MSG( wxT("unknown standard font") );
 760             return;
 761     }
 762
 763     DoChangeFont(font);
 764 }
 765
 766 void MyFrame::OnwxSystemSettingsFont(wxCommandEvent& event)
 767 {
 768     wxFont font;
 769
 770     switch ( event.GetId() )
 771     {
 772         case Font_wxSYS_OEM_FIXED_FONT:
 773             font = wxSystemSettings::GetFont(wxSYS_OEM_FIXED_FONT);
 774             break;
 775
 776         case Font_wxSYS_ANSI_FIXED_FONT:
 777             font = wxSystemSettings::GetFont(wxSYS_ANSI_FIXED_FONT);
 778             break;
 779
 780         case Font_wxSYS_ANSI_VAR_FONT:
 781             font = wxSystemSettings::GetFont(wxSYS_ANSI_VAR_FONT);
 782             break;
 783
 784         case Font_wxSYS_SYSTEM_FONT:
 785             font = wxSystemSettings::GetFont(wxSYS_SYSTEM_FONT);
 786             break;
 787
 788         case Font_wxSYS_DEVICE_DEFAULT_FONT:
 789             font = wxSystemSettings::GetFont(wxSYS_DEVICE_DEFAULT_FONT);
 790             break;
 791
 792         case Font_wxSYS_DEFAULT_GUI_FONT:
 793             font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
 794             break;
 795
 796         default:
 797             wxFAIL_MSG( wxT("unknown standard font") );
 798             return;
 799     }
 800
 801     DoChangeFont(font);
 802 }
 803
 804 void MyFrame::DoChangeFont(const wxFont& font, const wxColour& col)
 805 {
 806     m_canvas->SetTextFont(font);
 807     if ( col.Ok() )
 808         m_canvas->SetColour(col);
 809     m_canvas->Refresh();
 810
 811     m_textctrl->SetFont(font);
 812     if ( col.Ok() )
 813         m_textctrl->SetForegroundColour(col);
 814
 815     // update the state of the bold/italic/underlined menu items
 816     wxMenuBar *mbar = GetMenuBar();
 817     if ( mbar )
 818     {
 819         mbar->Check(Font_Light, font.GetWeight() == wxFONTWEIGHT_LIGHT);
 820         mbar->Check(Font_Bold, font.GetWeight() == wxFONTWEIGHT_BOLD);
 821
 822         mbar->Check(Font_Italic, font.GetStyle() == wxFONTSTYLE_ITALIC);
 823         mbar->Check(Font_Slant, font.GetStyle() == wxFONTSTYLE_SLANT);
 824
 825         mbar->Check(Font_Underlined, font.GetUnderlined());
 826     }
 827 }
 828
 829 void MyFrame::OnSelectFont(wxCommandEvent& WXUNUSED(event))
 830 {
 831     wxFontData data;
 832     data.SetInitialFont(m_canvas->GetTextFont());
 833     data.SetColour(m_canvas->GetColour());
 834
 835     wxFontDialog dialog(this, data);
 836     if ( dialog.ShowModal() == wxID_OK )
 837     {
 838         wxFontData retData = dialog.GetFontData();
 839         wxFont font = retData.GetChosenFont();
 840         wxColour colour = retData.GetColour();
 841
 842         DoChangeFont(font, colour);
 843     }
 844 }
 845
 846 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 847 {
 848     // true is to force the frame to close
 849     Close(true);
 850 }
 851
 852 void MyFrame::OnTestTextValue(wxCommandEvent& WXUNUSED(event))
 853 {
 854     wxString value = m_textctrl->GetValue();
 855     m_textctrl->SetValue(value);
 856     if ( m_textctrl->GetValue() != value )
 857     {
 858         wxLogError(wxT("Text value changed after getting and setting it"));
 859     }
 860 }
 861
 862 void MyFrame::OnViewMsg(wxCommandEvent& WXUNUSED(event))
 863 {
 864 #if wxUSE_FILEDLG
 865     // first, choose the file
 866     static wxString s_dir, s_file;
 867     wxFileDialog dialog(this, wxT("Open an email message file"),
 868                         s_dir, s_file);
 869     if ( dialog.ShowModal() != wxID_OK )
 870         return;
 871
 872     // save for the next time
 873     s_dir = dialog.GetDirectory();
 874     s_file = dialog.GetFilename();
 875
 876     wxString filename = dialog.GetPath();
 877
 878     // load it and search for Content-Type header
 879     wxTextFile file(filename);
 880     if ( !file.Open() )
 881         return;
 882
 883     wxString charset;
 884
 885     static const wxChar *prefix = wxT("Content-Type: text/plain; charset=");
 886     const size_t len = wxStrlen(prefix);
 887
 888     size_t n, count = file.GetLineCount();
 889     for ( n = 0; n < count; n++ )
 890     {
 891         wxString line = file[n];
 892
 893         if ( !line )
 894         {
 895             // if it is an email message, headers are over, no need to parse
 896             // all the file
 897             break;
 898         }
 899
 900         if ( line.Left(len) == prefix )
 901         {
 902             // found!
 903             const wxChar *pc = line.c_str() + len;
 904             if ( *pc == wxT('"') )
 905                 pc++;
 906
 907             while ( *pc && *pc != wxT('"') )
 908             {
 909                 charset += *pc++;
 910             }
 911
 912             break;
 913         }
 914     }
 915
 916     if ( !charset )
 917     {
 918         wxLogError(wxT("The file '%s' doesn't contain charset information."),
 919                    filename.c_str());
 920
 921         return;
 922     }
 923
 924     // ok, now get the corresponding encoding
 925     wxFontEncoding fontenc = wxFontMapper::Get()->CharsetToEncoding(charset);
 926     if ( fontenc == wxFONTENCODING_SYSTEM )
 927     {
 928         wxLogError(wxT("Charset '%s' is unsupported."), charset.c_str());
 929         return;
 930     }
 931
 932     m_textctrl->LoadFile(filename);
 933
 934     if ( fontenc == wxFONTENCODING_UTF8 ||
 935             !wxFontMapper::Get()->IsEncodingAvailable(fontenc) )
 936     {
 937         // try to find some similar encoding:
 938         wxFontEncoding encAlt;
 939         if ( wxFontMapper::Get()->GetAltForEncoding(fontenc, &encAlt) )
 940         {
 941             wxEncodingConverter conv;
 942
 943             if (conv.Init(fontenc, encAlt))
 944             {
 945                 fontenc = encAlt;
 946                 m_textctrl -> SetValue(conv.Convert(m_textctrl -> GetValue()));
 947             }
 948             else
 949             {
 950                 wxLogWarning(wxT("Cannot convert from '%s' to '%s'."),
 951                              wxFontMapper::GetEncodingDescription(fontenc).c_str(),
 952                              wxFontMapper::GetEncodingDescription(encAlt).c_str());
 953             }
 954         }
 955         else
 956             wxLogWarning(wxT("No fonts for encoding '%s' on this system."),
 957                          wxFontMapper::GetEncodingDescription(fontenc).c_str());
 958     }
 959
 960     // and now create the correct font
 961     if ( !DoEnumerateFamilies(false, fontenc, true /* silent */) )
 962     {
 963         wxFont font(wxNORMAL_FONT->GetPointSize(),
 964                     wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL,
 965                     wxFONTWEIGHT_NORMAL, false /* !underlined */,
 966                     wxEmptyString /* facename */, fontenc);
 967         if ( font.Ok() )
 968         {
 969             DoChangeFont(font);
 970         }
 971         else
 972         {
 973             wxLogWarning(wxT("No fonts for encoding '%s' on this system."),
 974                          wxFontMapper::GetEncodingDescription(fontenc).c_str());
 975         }
 976     }
 977 #endif // wxUSE_FILEDLG
 978 }
 979
 980 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 981 {
 982     wxMessageBox(wxT("wxWidgets font sample\n")
 983                  wxT("(c) 1999-2006 Vadim Zeitlin"),
 984                  wxString(wxT("About ")) + SAMPLE_TITLE,
 985                  wxOK | wxICON_INFORMATION, this);
 986 }
 987
 988 // ----------------------------------------------------------------------------
 989 // MyCanvas
 990 // ----------------------------------------------------------------------------
 991
 992 BEGIN_EVENT_TABLE(MyCanvas, wxWindow)
 993     EVT_PAINT(MyCanvas::OnPaint)
 994 END_EVENT_TABLE()
 995
 996 MyCanvas::MyCanvas( wxWindow *parent )
 997         : wxWindow( parent, wxID_ANY ),
 998           m_colour(*wxRED), m_font(*wxNORMAL_FONT)
 999 {
1000 }
1001
1002 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
1003 {
1004     wxPaintDC dc(this);
1005     PrepareDC(dc);
1006
1007     // set background
1008     dc.SetBackground(wxBrush(wxT("white"), wxSOLID));
1009     dc.Clear();
1010
1011     // one text line height
1012     wxCoord hLine = dc.GetCharHeight();
1013
1014     // the current text origin
1015     wxCoord x = 5,
1016             y = 5;
1017
1018     // output the font name/info
1019     wxString fontInfo;
1020     fontInfo.Printf(wxT("Font size is %d points, family: %s, encoding: %s"),
1021                     m_font.GetPointSize(),
1022                     m_font.GetFamilyString().c_str(),
1023                     wxFontMapper::
1024                         GetEncodingDescription(m_font.GetEncoding()).c_str());
1025
1026     dc.DrawText(fontInfo, x, y);
1027     y += hLine;
1028
1029     fontInfo.Printf(wxT("Style: %s, weight: %s, fixed width: %s"),
1030                     m_font.GetStyleString().c_str(),
1031                     m_font.GetWeightString().c_str(),
1032                     m_font.IsFixedWidth() ? _T("yes") : _T("no"));
1033
1034     dc.DrawText(fontInfo, x, y);
1035     y += hLine;
1036
1037     if ( m_font.Ok() )
1038     {
1039         const wxNativeFontInfo *info = m_font.GetNativeFontInfo();
1040         if ( info )
1041         {
1042             wxString fontDesc = m_font.GetNativeFontInfoUserDesc();
1043             fontInfo.Printf(wxT("Native font info: %s"), fontDesc.c_str());
1044
1045             dc.DrawText(fontInfo, x, y);
1046             y += hLine;
1047         }
1048     }
1049
1050     y += hLine;
1051
1052     // prepare to draw the font
1053     dc.SetFont(m_font);
1054     dc.SetTextForeground(m_colour);
1055
1056     // the size of one cell (Normally biggest char + small margin)
1057     wxCoord maxCharWidth, maxCharHeight;
1058     dc.GetTextExtent(wxT("W"), &maxCharWidth, &maxCharHeight);
1059     int w = maxCharWidth + 5,
1060         h = maxCharHeight + 4;
1061
1062
1063     // print all font symbols from 32 to 256 in 7 rows of 32 chars each
1064     for ( int i = 0; i < 7; i++ )
1065     {
1066         for ( int j = 0; j < 32; j++ )
1067         {
1068             wxChar c = (wxChar)(32 * (i + 1) + j);
1069
1070             wxCoord charWidth, charHeight;
1071             dc.GetTextExtent(c, &charWidth, &charHeight);
1072             dc.DrawText
1073             (
1074                 c,
1075                 x + w*j + (maxCharWidth - charWidth) / 2 + 1,
1076                 y + h*i + (maxCharHeight - charHeight) / 2
1077             );
1078         }
1079     }
1080
1081     // draw the lines between them
1082     dc.SetPen(wxPen(wxColour(_T("blue")), 1, wxSOLID));
1083     int l;
1084
1085     // horizontal
1086     for ( l = 0; l < 8; l++ )
1087     {
1088         int yl = y + h*l - 2;
1089         dc.DrawLine(x - 2, yl, x + 32*w - 1, yl);
1090     }
1091
1092     // and vertical
1093     for ( l = 0; l < 33; l++ )
1094     {
1095         int xl = x + w*l - 2;
1096         dc.DrawLine(xl, y - 2, xl, y + 7*h - 1);
1097     }
1098 }