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 // ----------------------------------------------------------------------------
  43 // private classes
  44 // ----------------------------------------------------------------------------
  45
  46 // Define a new application type, each program should derive a class from wxApp
  47 class MyApp : public wxApp
  48 {
  49 public:
  50     // override base class virtuals
  51     // ----------------------------
  52
  53     // this one is called on application startup and is a good place for the app
  54     // initialization (doing it here and not in the ctor allows to have an error
  55     // return: if OnInit() returns false, the application terminates)
  56     virtual bool OnInit();
  57 };
  58
  59 // MyCanvas is a canvas on which we show the font sample
  60 class MyCanvas: public wxWindow
  61 {
  62 public:
  63     MyCanvas( wxWindow *parent );
  64     virtual ~MyCanvas(){};
  65
  66     // accessors for the frame
  67     const wxFont& GetTextFont() const { return m_font; }
  68     const wxColour& GetColour() const { return m_colour; }
  69     void SetTextFont(const wxFont& font) { m_font = font; }
  70     void SetColour(const wxColour& colour) { m_colour = colour; }
  71
  72     // event handlers
  73     void OnPaint( wxPaintEvent &event );
  74
  75 private:
  76     wxColour m_colour;
  77     wxFont   m_font;
  78
  79     DECLARE_EVENT_TABLE()
  80 };
  81
  82 // Define a new frame type: this is going to be our main frame
  83 class MyFrame : public wxFrame
  84 {
  85 public:
  86     // ctor(s)
  87     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
  88
  89     // accessors
  90     MyCanvas *GetCanvas() const { return m_canvas; }
  91
  92     // event handlers (these functions should _not_ be virtual)
  93     void OnQuit(wxCommandEvent& event);
  94     void OnAbout(wxCommandEvent& event);
  95
  96     void OnIncFont(wxCommandEvent& WXUNUSED(event)) { DoResizeFont(+2); }
  97     void OnDecFont(wxCommandEvent& WXUNUSED(event)) { DoResizeFont(-2); }
  98
  99     void OnBold(wxCommandEvent& event);
 100     void OnItalic(wxCommandEvent& event);
 101     void OnUnderline(wxCommandEvent& event);
 102
 103     void OnwxPointerFont(wxCommandEvent& event);
 104
 105     void OnViewMsg(wxCommandEvent& event);
 106     void OnSelectFont(wxCommandEvent& event);
 107     void OnEnumerateFamiliesForEncoding(wxCommandEvent& event);
 108     void OnEnumerateFamilies(wxCommandEvent& WXUNUSED(event))
 109         { DoEnumerateFamilies(false); }
 110     void OnEnumerateFixedFamilies(wxCommandEvent& WXUNUSED(event))
 111         { DoEnumerateFamilies(true); }
 112     void OnEnumerateEncodings(wxCommandEvent& event);
 113
 114     void OnCheckNativeToFromString(wxCommandEvent& event);
 115     void OnCheckNativeToFromUserString(wxCommandEvent& event);
 116     void OnCheckFaceName(wxCommandEvent& event);
 117
 118 protected:
 119     bool DoEnumerateFamilies(bool fixedWidthOnly,
 120                              wxFontEncoding encoding = wxFONTENCODING_SYSTEM,
 121                              bool silent = false);
 122
 123     void DoResizeFont(int diff);
 124     void DoChangeFont(const wxFont& font, const wxColour& col = wxNullColour);
 125
 126     size_t      m_fontSize; // in points
 127
 128     wxTextCtrl *m_textctrl;
 129     MyCanvas   *m_canvas;
 130
 131 private:
 132     // any class wishing to process wxWidgets events must use this macro
 133     DECLARE_EVENT_TABLE()
 134 };
 135
 136 // ----------------------------------------------------------------------------
 137 // constants
 138 // ----------------------------------------------------------------------------
 139
 140 // IDs for the controls and the menu commands
 141 enum
 142 {
 143     // menu items
 144     Font_Quit = 1,
 145     Font_About,
 146     Font_ViewMsg,
 147     Font_IncSize,
 148     Font_DecSize,
 149     Font_Bold,
 150     Font_Italic,
 151     Font_Underlined,
 152     Font_wxNORMAL_FONT,
 153     Font_wxSMALL_FONT,
 154     Font_wxITALIC_FONT,
 155     Font_wxSWISS_FONT,
 156     Font_Standard,
 157
 158     Font_Choose = 100,
 159     Font_EnumFamiliesForEncoding,
 160     Font_EnumFamilies,
 161     Font_EnumFixedFamilies,
 162     Font_EnumEncodings,
 163     Font_CheckNativeToFromString,
 164     Font_CheckNativeToFromUserString,
 165     Font_CheckFaceName,
 166     Font_Max
 167 };
 168
 169 // ----------------------------------------------------------------------------
 170 // event tables and other macros for wxWidgets
 171 // ----------------------------------------------------------------------------
 172
 173 // the event tables connect the wxWidgets events with the functions (event
 174 // handlers) which process them. It can be also done at run-time, but for the
 175 // simple menu events like this the static method is much simpler.
 176 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 177     EVT_MENU(Font_Quit,  MyFrame::OnQuit)
 178     EVT_MENU(Font_ViewMsg, MyFrame::OnViewMsg)
 179     EVT_MENU(Font_About, MyFrame::OnAbout)
 180
 181     EVT_MENU(Font_IncSize, MyFrame::OnIncFont)
 182     EVT_MENU(Font_DecSize, MyFrame::OnDecFont)
 183     EVT_MENU(Font_Bold, MyFrame::OnBold)
 184     EVT_MENU(Font_Italic, MyFrame::OnItalic)
 185     EVT_MENU(Font_Underlined, MyFrame::OnUnderline)
 186
 187     EVT_MENU(Font_wxNORMAL_FONT, MyFrame::OnwxPointerFont)
 188     EVT_MENU(Font_wxSMALL_FONT, MyFrame::OnwxPointerFont)
 189     EVT_MENU(Font_wxITALIC_FONT, MyFrame::OnwxPointerFont)
 190     EVT_MENU(Font_wxSWISS_FONT, MyFrame::OnwxPointerFont)
 191
 192
 193     EVT_MENU(Font_CheckNativeToFromString, MyFrame::OnCheckNativeToFromString)
 194     EVT_MENU(Font_CheckNativeToFromUserString, MyFrame::OnCheckNativeToFromUserString)
 195     EVT_MENU(Font_CheckFaceName, MyFrame::OnCheckFaceName)
 196
 197     EVT_MENU(Font_Choose, MyFrame::OnSelectFont)
 198     EVT_MENU(Font_EnumFamiliesForEncoding, MyFrame::OnEnumerateFamiliesForEncoding)
 199     EVT_MENU(Font_EnumFamilies, MyFrame::OnEnumerateFamilies)
 200     EVT_MENU(Font_EnumFixedFamilies, MyFrame::OnEnumerateFixedFamilies)
 201     EVT_MENU(Font_EnumEncodings, MyFrame::OnEnumerateEncodings)
 202 END_EVENT_TABLE()
 203
 204 // Create a new application object: this macro will allow wxWidgets to create
 205 // the application object during program execution (it's better than using a
 206 // static object for many reasons) and also declares the accessor function
 207 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 208 // not wxApp)
 209 IMPLEMENT_APP(MyApp)
 210
 211 // ============================================================================
 212 // implementation
 213 // ============================================================================
 214
 215 // ----------------------------------------------------------------------------
 216 // the application class
 217 // ----------------------------------------------------------------------------
 218
 219 // `Main program' equivalent: the program execution "starts" here
 220 bool MyApp::OnInit()
 221 {
 222     // Create the main application window
 223     MyFrame *frame = new MyFrame(wxT("Font wxWidgets demo"),
 224                                  wxPoint(50, 50), wxSize(600, 400));
 225
 226     // Show it and tell the application that it's our main window
 227     frame->Show(true);
 228     SetTopWindow(frame);
 229
 230     // success: wxApp::OnRun() will be called which will enter the main message
 231     // loop and the application will run. If we returned 'false' here, the
 232     // application would exit immediately.
 233     return true;
 234 }
 235
 236 // ----------------------------------------------------------------------------
 237 // main frame
 238 // ----------------------------------------------------------------------------
 239
 240 // frame constructor
 241 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 242        : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size), m_textctrl(NULL)
 243 {
 244     m_fontSize = 12;
 245
 246     SetIcon(wxIcon(sample_xpm));
 247
 248     // create a menu bar
 249     wxMenu *menuFile = new wxMenu;
 250
 251     menuFile->Append(Font_ViewMsg, wxT("&View...\tCtrl-V"),
 252                      wxT("View an email message file"));
 253     menuFile->AppendSeparator();
 254     menuFile->Append(Font_About, wxT("&About...\tCtrl-A"), wxT("Show about dialog"));
 255     menuFile->AppendSeparator();
 256     menuFile->Append(Font_Quit, wxT("E&xit\tAlt-X"), wxT("Quit this program"));
 257
 258     wxMenu *menuFont = new wxMenu;
 259     menuFont->Append(Font_IncSize, wxT("&Increase font size by 2 points\tCtrl-I"));
 260     menuFont->Append(Font_DecSize, wxT("&Decrease font size by 2 points\tCtrl-D"));
 261     menuFont->AppendSeparator();
 262     menuFont->AppendCheckItem(Font_Bold, wxT("&Bold\tCtrl-B"), wxT("Toggle bold state"));
 263     menuFont->AppendCheckItem(Font_Italic, wxT("&Oblique\tCtrl-O"), wxT("Toggle italic state"));
 264     menuFont->AppendCheckItem(Font_Underlined, wxT("&Underlined\tCtrl-U"),
 265                      wxT("Toggle underlined state"));
 266
 267     menuFont->AppendSeparator();
 268     menuFont->Append(Font_CheckNativeToFromString,
 269                      wxT("Check Native Font Info To/From String"));
 270     menuFont->Append(Font_CheckNativeToFromUserString,
 271                      wxT("Check Native Font Info User String"));
 272     menuFont->Append(Font_CheckFaceName,
 273                      wxT("Check font face name"));
 274
 275     wxMenu *menuSelect = new wxMenu;
 276     menuSelect->Append(Font_Choose, wxT("&Select font...\tCtrl-S"),
 277                      wxT("Select a standard font"));
 278
 279     wxMenu *menuStdFonts = new wxMenu;
 280     menuStdFonts->Append(Font_wxNORMAL_FONT, wxT("wxNORMAL_FONT"), wxT("Normal font used by wxWidgets"));
 281     menuStdFonts->Append(Font_wxSMALL_FONT,  wxT("wxSMALL_FONT"),  wxT("Small font used by wxWidgets"));
 282     menuStdFonts->Append(Font_wxITALIC_FONT, wxT("wxITALIC_FONT"), wxT("Italic font used by wxWidgets"));
 283     menuStdFonts->Append(Font_wxSWISS_FONT,  wxT("wxSWISS_FONT"),  wxT("Swiss font used by wxWidgets"));
 284     menuSelect->Append(Font_Standard, wxT("Standar&d fonts"), menuStdFonts);
 285
 286     menuSelect->AppendSeparator();
 287     menuSelect->Append(Font_EnumFamilies, wxT("Enumerate font &families\tCtrl-F"));
 288     menuSelect->Append(Font_EnumFixedFamilies,
 289                      wxT("Enumerate fi&xed font families\tCtrl-X"));
 290     menuSelect->Append(Font_EnumEncodings,
 291                      wxT("Enumerate &encodings\tCtrl-E"));
 292     menuSelect->Append(Font_EnumFamiliesForEncoding,
 293                      wxT("Find font for en&coding...\tCtrl-C"),
 294                      wxT("Find font families for given encoding"));
 295
 296     // now append the freshly created menu to the menu bar...
 297     wxMenuBar *menuBar = new wxMenuBar;
 298     menuBar->Append(menuFile, wxT("&File"));
 299     menuBar->Append(menuFont, wxT("F&ont"));
 300     menuBar->Append(menuSelect, wxT("&Select"));
 301
 302     // ... and attach this menu bar to the frame
 303     SetMenuBar(menuBar);
 304
 305     wxSplitterWindow *splitter = new wxSplitterWindow(this);
 306
 307     m_textctrl = new wxTextCtrl(splitter, wxID_ANY,
 308                                 wxT("Paste text here to see how it looks\nlike in the given font"),
 309                                 wxDefaultPosition, wxDefaultSize,
 310                                 wxTE_MULTILINE);
 311
 312     m_canvas = new MyCanvas(splitter);
 313
 314     splitter->SplitHorizontally(m_textctrl, m_canvas, 100);
 315
 316 #if wxUSE_STATUSBAR
 317     // create a status bar just for fun (by default with 1 pane only)
 318     CreateStatusBar();
 319     SetStatusText(wxT("Welcome to wxWidgets font demo!"));
 320 #endif // wxUSE_STATUSBAR
 321 }
 322
 323 // --------------------------------------------------------
 324
 325 class MyEncodingEnumerator : public wxFontEnumerator
 326 {
 327 public:
 328     MyEncodingEnumerator()
 329         { m_n = 0; }
 330
 331     const wxString& GetText() const
 332         { return m_text; }
 333
 334 protected:
 335     virtual bool OnFontEncoding(const wxString& facename,
 336                                 const wxString& encoding)
 337     {
 338         wxString text;
 339         text.Printf(wxT("Encoding %u: %s (available in facename '%s')\n"),
 340                     (unsigned int) ++m_n, encoding.c_str(), facename.c_str());
 341         m_text += text;
 342         return true;
 343     }
 344
 345 private:
 346     size_t m_n;
 347     wxString m_text;
 348 };
 349
 350 void MyFrame::OnEnumerateEncodings(wxCommandEvent& WXUNUSED(event))
 351 {
 352     MyEncodingEnumerator fontEnumerator;
 353
 354     fontEnumerator.EnumerateEncodings();
 355
 356     wxLogMessage(wxT("Enumerating all available encodings:\n%s"),
 357                  fontEnumerator.GetText().c_str());
 358 }
 359
 360 // -------------------------------------------------------------
 361
 362 class MyFontEnumerator : public wxFontEnumerator
 363 {
 364 public:
 365     bool GotAny() const
 366         { return !m_facenames.IsEmpty(); }
 367
 368     const wxArrayString& GetFacenames() const
 369         { return m_facenames; }
 370
 371 protected:
 372     virtual bool OnFacename(const wxString& facename)
 373     {
 374         m_facenames.Add(facename);
 375         return true;
 376     }
 377
 378     private:
 379         wxArrayString m_facenames;
 380 } fontEnumerator;
 381
 382 bool MyFrame::DoEnumerateFamilies(bool fixedWidthOnly,
 383                                   wxFontEncoding encoding,
 384                                   bool silent)
 385 {
 386     MyFontEnumerator fontEnumerator;
 387
 388     fontEnumerator.EnumerateFacenames(encoding, fixedWidthOnly);
 389
 390     if ( fontEnumerator.GotAny() )
 391     {
 392         int nFacenames = fontEnumerator.GetFacenames().GetCount();
 393         if ( !silent )
 394         {
 395             wxLogStatus(this, wxT("Found %d %sfonts"),
 396                         nFacenames, fixedWidthOnly ? wxT("fixed width ") : wxT(""));
 397         }
 398
 399         wxString facename;
 400
 401         if ( silent )
 402         {
 403             // choose the first
 404             facename = fontEnumerator.GetFacenames().Item(0);
 405         }
 406         else
 407         {
 408             // let the user choose
 409             wxString *facenames = new wxString[nFacenames];
 410             int n;
 411             for ( n = 0; n < nFacenames; n++ )
 412                 facenames[n] = fontEnumerator.GetFacenames().Item(n);
 413
 414             n = wxGetSingleChoiceIndex(wxT("Choose a facename"), wxT("Font demo"),
 415                                        nFacenames, facenames, this);
 416
 417             if ( n != -1 )
 418                 facename = facenames[n];
 419
 420             delete [] facenames;
 421         }
 422
 423         if ( !facename.empty() )
 424         {
 425             wxFont font(12, wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL,
 426                         wxFONTWEIGHT_NORMAL, false, facename, encoding);
 427
 428             DoChangeFont(font);
 429         }
 430
 431         return true;
 432     }
 433     else if ( !silent )
 434     {
 435         wxLogWarning(wxT("No such fonts found."));
 436     }
 437
 438     return false;
 439 }
 440
 441 void MyFrame::OnEnumerateFamiliesForEncoding(wxCommandEvent& WXUNUSED(event))
 442 {
 443     static wxFontEncoding encodings[] =
 444     {
 445         wxFONTENCODING_ISO8859_1,
 446         wxFONTENCODING_ISO8859_2,
 447         wxFONTENCODING_ISO8859_5,
 448         wxFONTENCODING_ISO8859_7,
 449         wxFONTENCODING_ISO8859_15,
 450         wxFONTENCODING_KOI8,
 451         wxFONTENCODING_KOI8_U,
 452         wxFONTENCODING_CP1250,
 453         wxFONTENCODING_CP1251,
 454         wxFONTENCODING_CP1252,
 455     };
 456
 457     static const wxString encodingNames[] =
 458     {
 459         wxT("Western European (ISO-8859-1)"),
 460         wxT("Central European (ISO-8859-2)"),
 461         wxT("Cyrillic (ISO-8859-5)"),
 462         wxT("Greek (ISO-8859-7)"),
 463         wxT("Western European with Euro (ISO-8859-15)"),
 464         wxT("KOI8-R"),
 465         wxT("KOI8-U"),
 466         wxT("Windows Central European (CP 1250)"),
 467         wxT("Windows Cyrillic (CP 1251)"),
 468         wxT("Windows Western European (CP 1252)"),
 469     };
 470
 471     int n = wxGetSingleChoiceIndex(wxT("Choose an encoding"), wxT("Font demo"),
 472                                    WXSIZEOF(encodingNames),
 473                                    encodingNames,
 474                                    this);
 475
 476     if ( n != -1 )
 477     {
 478         DoEnumerateFamilies(false, encodings[n]);
 479     }
 480 }
 481
 482 void MyFrame::OnCheckNativeToFromString(wxCommandEvent& WXUNUSED(event))
 483 {
 484     wxString fontInfo = m_canvas->GetTextFont().GetNativeFontInfoDesc();
 485
 486     if ( fontInfo.empty() )
 487     {
 488         wxLogError(wxT("Native font info string is empty!"));
 489     }
 490     else
 491     {
 492         wxFont *font = wxFont::New(fontInfo);
 493         if ( fontInfo != font->GetNativeFontInfoDesc() )
 494             wxLogError(wxT("wxNativeFontInfo ToString()/FromString() broken!"));
 495         else
 496             wxLogMessage(wxT("wxNativeFontInfo works: %s"), fontInfo.c_str());
 497
 498         delete font;
 499      }
 500 }
 501
 502 void MyFrame::OnCheckFaceName(wxCommandEvent& WXUNUSED(event))
 503 {
 504     wxString facename = GetCanvas()->GetTextFont().GetFaceName();
 505     wxString newFaceName = wxGetTextFromUser(
 506             wxT("Here you can edit current font face name."),
 507             wxT("Input font facename"), facename,
 508             this);
 509     if (newFaceName.IsEmpty())
 510         return;     // user clicked "Cancel" - do nothing
 511
 512     wxFont font(GetCanvas()->GetTextFont());
 513     if (font.SetFaceName(newFaceName))      // change facename only
 514     {
 515         wxASSERT_MSG(font.Ok(), wxT("The font should now be valid"));
 516         DoChangeFont(font);
 517     }
 518     else
 519     {
 520         wxASSERT_MSG(!font.Ok(), wxT("The font should now be invalid"));
 521         wxMessageBox(wxT("There is no font with such face name..."),
 522                      wxT("Invalid face name"), wxOK|wxICON_ERROR, this);
 523     }
 524 }
 525
 526 void MyFrame::OnCheckNativeToFromUserString(wxCommandEvent& WXUNUSED(event))
 527 {
 528     wxString fontdesc = GetCanvas()->GetTextFont().GetNativeFontInfoUserDesc();
 529     wxString fontUserInfo = wxGetTextFromUser(
 530             wxT("Here you can edit current font description"),
 531             wxT("Input font description"), fontdesc,
 532             this);
 533     if (fontUserInfo.IsEmpty())
 534         return;     // user clicked "Cancel" - do nothing
 535
 536     wxFont font;
 537     if (font.SetNativeFontInfoUserDesc(fontUserInfo))
 538     {
 539         wxASSERT_MSG(font.Ok(), wxT("The font should now be valid"));
 540         DoChangeFont(font);
 541     }
 542     else
 543     {
 544         wxASSERT_MSG(!font.Ok(), wxT("The font should now be invalid"));
 545         wxMessageBox(wxT("Error trying to create a font with such description..."));
 546     }
 547 }
 548
 549 void MyFrame::DoResizeFont(int diff)
 550 {
 551     wxFont font = m_canvas->GetTextFont();
 552
 553     font.SetPointSize(font.GetPointSize() + diff);
 554     DoChangeFont(font);
 555 }
 556
 557 void MyFrame::OnBold(wxCommandEvent& event)
 558 {
 559     wxFont font = m_canvas->GetTextFont();
 560
 561     font.SetWeight(event.IsChecked() ? wxFONTWEIGHT_BOLD : wxFONTWEIGHT_NORMAL);
 562     DoChangeFont(font);
 563 }
 564
 565 void MyFrame::OnItalic(wxCommandEvent& event)
 566 {
 567     wxFont font = m_canvas->GetTextFont();
 568
 569     font.SetStyle(event.IsChecked() ? wxFONTSTYLE_ITALIC : wxFONTSTYLE_NORMAL);
 570     DoChangeFont(font);
 571 }
 572
 573 void MyFrame::OnUnderline(wxCommandEvent& event)
 574 {
 575     wxFont font = m_canvas->GetTextFont();
 576
 577     font.SetUnderlined(event.IsChecked());
 578     DoChangeFont(font);
 579 }
 580
 581 void MyFrame::OnwxPointerFont(wxCommandEvent& event)
 582 {
 583     wxFont font;
 584
 585     switch (event.GetId())
 586     {
 587         case Font_wxNORMAL_FONT : font = wxFont(*wxNORMAL_FONT); break;
 588         case Font_wxSMALL_FONT  : font = wxFont(*wxSMALL_FONT); break;
 589         case Font_wxITALIC_FONT : font = wxFont(*wxITALIC_FONT); break;
 590         case Font_wxSWISS_FONT  : font = wxFont(*wxSWISS_FONT); break;
 591         default                 : font = wxFont(*wxNORMAL_FONT); break;
 592     }
 593
 594     DoChangeFont(font);
 595 }
 596
 597 void MyFrame::DoChangeFont(const wxFont& font, const wxColour& col)
 598 {
 599     m_canvas->SetTextFont(font);
 600     if ( col.Ok() )
 601         m_canvas->SetColour(col);
 602     m_canvas->Refresh();
 603
 604     m_textctrl->SetFont(font);
 605     if ( col.Ok() )
 606         m_textctrl->SetForegroundColour(col);
 607
 608     // update the state of the bold/italic/underlined menu items
 609     wxMenuBar *mbar = GetMenuBar();
 610     if ( mbar )
 611     {
 612         mbar->Check(Font_Bold, font.GetWeight() == wxFONTWEIGHT_BOLD);
 613         mbar->Check(Font_Italic, font.GetStyle() == wxFONTSTYLE_ITALIC);
 614         mbar->Check(Font_Underlined, font.GetUnderlined());
 615     }
 616 }
 617
 618 void MyFrame::OnSelectFont(wxCommandEvent& WXUNUSED(event))
 619 {
 620     wxFontData data;
 621     data.SetInitialFont(m_canvas->GetTextFont());
 622     data.SetColour(m_canvas->GetColour());
 623
 624     wxFontDialog dialog(this, data);
 625     if ( dialog.ShowModal() == wxID_OK )
 626     {
 627         wxFontData retData = dialog.GetFontData();
 628         wxFont font = retData.GetChosenFont();
 629         wxColour colour = retData.GetColour();
 630
 631         DoChangeFont(font, colour);
 632     }
 633 }
 634
 635 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 636 {
 637     // true is to force the frame to close
 638     Close(true);
 639 }
 640
 641 void MyFrame::OnViewMsg(wxCommandEvent& WXUNUSED(event))
 642 {
 643 #if wxUSE_FILEDLG
 644     // first, choose the file
 645     static wxString s_dir, s_file;
 646     wxFileDialog dialog(this, wxT("Open an email message file"),
 647                         s_dir, s_file);
 648     if ( dialog.ShowModal() != wxID_OK )
 649         return;
 650
 651     // save for the next time
 652     s_dir = dialog.GetDirectory();
 653     s_file = dialog.GetFilename();
 654
 655     wxString filename = dialog.GetPath();
 656
 657     // load it and search for Content-Type header
 658     wxTextFile file(filename);
 659     if ( !file.Open() )
 660         return;
 661
 662     wxString charset;
 663
 664     static const wxChar *prefix = wxT("Content-Type: text/plain; charset=");
 665     const size_t len = wxStrlen(prefix);
 666
 667     size_t n, count = file.GetLineCount();
 668     for ( n = 0; n < count; n++ )
 669     {
 670         wxString line = file[n];
 671
 672         if ( !line )
 673         {
 674             // if it is an email message, headers are over, no need to parse
 675             // all the file
 676             break;
 677         }
 678
 679         if ( line.Left(len) == prefix )
 680         {
 681             // found!
 682             const wxChar *pc = line.c_str() + len;
 683             if ( *pc == wxT('"') )
 684                 pc++;
 685
 686             while ( *pc && *pc != wxT('"') )
 687             {
 688                 charset += *pc++;
 689             }
 690
 691             break;
 692         }
 693     }
 694
 695     if ( !charset )
 696     {
 697         wxLogError(wxT("The file '%s' doesn't contain charset information."),
 698                    filename.c_str());
 699
 700         return;
 701     }
 702
 703     // ok, now get the corresponding encoding
 704     wxFontEncoding fontenc = wxFontMapper::Get()->CharsetToEncoding(charset);
 705     if ( fontenc == wxFONTENCODING_SYSTEM )
 706     {
 707         wxLogError(wxT("Charset '%s' is unsupported."), charset.c_str());
 708         return;
 709     }
 710
 711     m_textctrl->LoadFile(filename);
 712
 713     if ( fontenc == wxFONTENCODING_UTF8 ||
 714             !wxFontMapper::Get()->IsEncodingAvailable(fontenc) )
 715     {
 716         // try to find some similar encoding:
 717         wxFontEncoding encAlt;
 718         if ( wxFontMapper::Get()->GetAltForEncoding(fontenc, &encAlt) )
 719         {
 720             wxEncodingConverter conv;
 721
 722             if (conv.Init(fontenc, encAlt))
 723             {
 724                 fontenc = encAlt;
 725                 m_textctrl -> SetValue(conv.Convert(m_textctrl -> GetValue()));
 726             }
 727             else
 728             {
 729                 wxLogWarning(wxT("Cannot convert from '%s' to '%s'."),
 730                              wxFontMapper::GetEncodingDescription(fontenc).c_str(),
 731                              wxFontMapper::GetEncodingDescription(encAlt).c_str());
 732             }
 733         }
 734         else
 735             wxLogWarning(wxT("No fonts for encoding '%s' on this system."),
 736                          wxFontMapper::GetEncodingDescription(fontenc).c_str());
 737     }
 738
 739     // and now create the correct font
 740     if ( !DoEnumerateFamilies(false, fontenc, true /* silent */) )
 741     {
 742         wxFont font(12, wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL,
 743                     wxFONTWEIGHT_NORMAL, false /* !underlined */,
 744                     wxEmptyString /* facename */, fontenc);
 745         if ( font.Ok() )
 746         {
 747             DoChangeFont(font);
 748         }
 749         else
 750         {
 751             wxLogWarning(wxT("No fonts for encoding '%s' on this system."),
 752                          wxFontMapper::GetEncodingDescription(fontenc).c_str());
 753         }
 754     }
 755 #endif // wxUSE_FILEDLG
 756 }
 757
 758 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 759 {
 760     wxMessageBox(wxT("wxWidgets font demo\n")
 761                  wxT("(c) 1999 Vadim Zeitlin"),
 762                  wxT("About Font"),
 763                  wxOK | wxICON_INFORMATION, this);
 764 }
 765
 766 // ----------------------------------------------------------------------------
 767 // MyCanvas
 768 // ----------------------------------------------------------------------------
 769
 770 BEGIN_EVENT_TABLE(MyCanvas, wxWindow)
 771     EVT_PAINT(MyCanvas::OnPaint)
 772 END_EVENT_TABLE()
 773
 774 MyCanvas::MyCanvas( wxWindow *parent )
 775         : wxWindow( parent, wxID_ANY ),
 776           m_colour(*wxRED), m_font(*wxNORMAL_FONT)
 777 {
 778 }
 779
 780 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 781 {
 782     wxPaintDC dc(this);
 783     PrepareDC(dc);
 784
 785     // set background
 786     dc.SetBackground(wxBrush(wxT("white"), wxSOLID));
 787     dc.Clear();
 788
 789     // one text line height
 790     wxCoord hLine = dc.GetCharHeight();
 791
 792     // the current text origin
 793     wxCoord x = 5,
 794             y = 5;
 795
 796     // output the font name/info
 797     wxString fontInfo;
 798     fontInfo.Printf(wxT("Font size is %d points, family: %s, encoding: %s"),
 799                     m_font.GetPointSize(),
 800                     m_font.GetFamilyString().c_str(),
 801                     wxFontMapper::
 802                         GetEncodingDescription(m_font.GetEncoding()).c_str());
 803
 804     dc.DrawText(fontInfo, x, y);
 805     y += hLine;
 806
 807     fontInfo.Printf(wxT("Style: %s, weight: %s, fixed width: %s"),
 808                     m_font.GetStyleString().c_str(),
 809                     m_font.GetWeightString().c_str(),
 810                     m_font.IsFixedWidth() ? _T("yes") : _T("no"));
 811
 812     dc.DrawText(fontInfo, x, y);
 813     y += hLine;
 814
 815     if ( m_font.Ok() )
 816     {
 817         const wxNativeFontInfo *info = m_font.GetNativeFontInfo();
 818         if ( info )
 819         {
 820             wxString fontDesc = m_font.GetNativeFontInfoUserDesc();
 821             fontInfo.Printf(wxT("Native font info: %s"), fontDesc.c_str());
 822
 823             dc.DrawText(fontInfo, x, y);
 824             y += hLine;
 825         }
 826     }
 827
 828     y += hLine;
 829
 830     // prepare to draw the font
 831     dc.SetFont(m_font);
 832     dc.SetTextForeground(m_colour);
 833
 834     // the size of one cell (Normally biggest char + small margin)
 835     long maxCharWidth, maxCharHeight;
 836     dc.GetTextExtent(wxT("W"), &maxCharWidth, &maxCharHeight);
 837     int w = maxCharWidth + 5,
 838         h = maxCharHeight + 4;
 839
 840
 841     // print all font symbols from 32 to 256 in 7 rows of 32 chars each
 842     for ( int i = 0; i < 7; i++ )
 843     {
 844         for ( int j = 0; j < 32; j++ )
 845         {
 846             wxChar c = (wxChar)(32 * (i + 1) + j);
 847
 848             long charWidth, charHeight;
 849             dc.GetTextExtent(c, &charWidth, &charHeight);
 850             dc.DrawText
 851             (
 852                 c,
 853                 x + w*j + (maxCharWidth - charWidth) / 2 + 1,
 854                 y + h*i + (maxCharHeight - charHeight) / 2
 855             );
 856         }
 857     }
 858
 859     // draw the lines between them
 860     dc.SetPen(wxPen(wxColour(_T("blue")), 1, wxSOLID));
 861     int l;
 862
 863     // horizontal
 864     for ( l = 0; l < 8; l++ )
 865     {
 866         int yl = y + h*l - 2;
 867         dc.DrawLine(x - 2, yl, x + 32*w - 1, yl);
 868     }
 869
 870     // and vertical
 871     for ( l = 0; l < 33; l++ )
 872     {
 873         int xl = x + w*l - 2;
 874         dc.DrawLine(xl, y - 2, xl, y + 7*h - 1);
 875     }
 876 }