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