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