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< wxWindows 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
  31 // ----------------------------------------------------------------------------
  32 // private classes
  33 // ----------------------------------------------------------------------------
  34
  35 // Define a new application type, each program should derive a class from wxApp
  36 class MyApp : public wxApp
  37 {
  38 public:
  39     // override base class virtuals
  40     // ----------------------------
  41
  42     // this one is called on application startup and is a good place for the app
  43     // initialization (doing it here and not in the ctor allows to have an error
  44     // return: if OnInit() returns false, the application terminates)
  45     virtual bool OnInit();
  46 };
  47
  48 // MyCanvas is a canvas on which we show the font sample
  49 class MyCanvas: public wxWindow
  50 {
  51 public:
  52     MyCanvas( wxWindow *parent );
  53     ~MyCanvas();
  54
  55     // accessors for the frame
  56     const wxFont& GetTextFont() const { return m_font; }
  57     const wxColour& GetColour() const { return m_colour; }
  58     void SetTextFont(const wxFont& font) { m_font = font; }
  59     void SetColour(const wxColour& colour) { m_colour = colour; }
  60
  61     // event handlers
  62     void OnPaint( wxPaintEvent &event );
  63
  64 private:
  65     wxColour m_colour;
  66     wxFont   m_font;
  67
  68     DECLARE_EVENT_TABLE()
  69 };
  70
  71 // Define a new frame type: this is going to be our main frame
  72 class MyFrame : public wxFrame
  73 {
  74 public:
  75     // ctor(s)
  76     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
  77
  78     // accessors
  79     MyCanvas *GetCanvas() const { return m_canvas; }
  80
  81     // event handlers (these functions should _not_ be virtual)
  82     void OnQuit(wxCommandEvent& event);
  83     void OnAbout(wxCommandEvent& event);
  84     void OnSelectFont(wxCommandEvent& event);
  85     void OnEnumerateFamiliesForEncoding(wxCommandEvent& event);
  86     void OnEnumerateFamilies(wxCommandEvent& WXUNUSED(event))
  87         { DoEnumerateFamilies(FALSE); }
  88     void OnEnumerateFixedFamilies(wxCommandEvent& WXUNUSED(event))
  89         { DoEnumerateFamilies(TRUE); }
  90     void OnEnumerateEncodings(wxCommandEvent& event);
  91
  92     void OnSize(wxSizeEvent& event);
  93
  94 protected:
  95     void DoEnumerateFamilies(bool fixedWidthOnly,
  96                              wxFontEncoding encoding = wxFONTENCODING_SYSTEM);
  97
  98     void DoChangeFont(const wxFont& font, const wxColour& col = wxNullColour);
  99
 100     void Resize(const wxSize& size, const wxFont& font = wxNullFont);
 101
 102     wxTextCtrl *m_textctrl;
 103     MyCanvas   *m_canvas;
 104
 105 private:
 106     // any class wishing to process wxWindows events must use this macro
 107     DECLARE_EVENT_TABLE()
 108 };
 109
 110 // ----------------------------------------------------------------------------
 111 // constants
 112 // ----------------------------------------------------------------------------
 113
 114 // IDs for the controls and the menu commands
 115 enum
 116 {
 117     // menu items
 118     Font_Quit = 1,
 119     Font_About,
 120     Font_Choose = 100,
 121     Font_EnumFamiliesForEncoding,
 122     Font_EnumFamilies,
 123     Font_EnumFixedFamilies,
 124     Font_EnumEncodings,
 125     Font_Max
 126 };
 127
 128 // ----------------------------------------------------------------------------
 129 // event tables and other macros for wxWindows
 130 // ----------------------------------------------------------------------------
 131
 132 // the event tables connect the wxWindows events with the functions (event
 133 // handlers) which process them. It can be also done at run-time, but for the
 134 // simple menu events like this the static method is much simpler.
 135 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 136     EVT_MENU(Font_Quit,  MyFrame::OnQuit)
 137     EVT_MENU(Font_About, MyFrame::OnAbout)
 138     EVT_MENU(Font_Choose, MyFrame::OnSelectFont)
 139     EVT_MENU(Font_EnumFamiliesForEncoding, MyFrame::OnEnumerateFamiliesForEncoding)
 140     EVT_MENU(Font_EnumFamilies, MyFrame::OnEnumerateFamilies)
 141     EVT_MENU(Font_EnumFixedFamilies, MyFrame::OnEnumerateFixedFamilies)
 142     EVT_MENU(Font_EnumEncodings, MyFrame::OnEnumerateEncodings)
 143
 144     EVT_SIZE(MyFrame::OnSize)
 145 END_EVENT_TABLE()
 146
 147 // Create a new application object: this macro will allow wxWindows to create
 148 // the application object during program execution (it's better than using a
 149 // static object for many reasons) and also declares the accessor function
 150 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 151 // not wxApp)
 152 IMPLEMENT_APP(MyApp)
 153
 154 // ============================================================================
 155 // implementation
 156 // ============================================================================
 157
 158 // ----------------------------------------------------------------------------
 159 // the application class
 160 // ----------------------------------------------------------------------------
 161
 162 // `Main program' equivalent: the program execution "starts" here
 163 bool MyApp::OnInit()
 164 {
 165     // Create the main application window
 166     MyFrame *frame = new MyFrame("Font wxWindows demo",
 167                                  wxPoint(50, 50), wxSize(450, 340));
 168
 169     // Show it and tell the application that it's our main window
 170     frame->Show(TRUE);
 171     SetTopWindow(frame);
 172
 173     // success: wxApp::OnRun() will be called which will enter the main message
 174     // loop and the application will run. If we returned FALSE here, the
 175     // application would exit immediately.
 176     return TRUE;
 177 }
 178
 179 // ----------------------------------------------------------------------------
 180 // main frame
 181 // ----------------------------------------------------------------------------
 182
 183 // frame constructor
 184 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 185        : wxFrame((wxFrame *)NULL, -1, title, pos, size), m_textctrl(NULL)
 186 {
 187     // create a menu bar
 188     wxMenu *menuFile = new wxMenu;
 189
 190     menuFile->Append(Font_About, "&About...\tCtrl-A", "Show about dialog");
 191     menuFile->AppendSeparator();
 192     menuFile->Append(Font_Quit, "E&xit\tAlt-X", "Quit this program");
 193
 194     wxMenu *menuFont = new wxMenu;
 195     menuFont->Append(Font_Choose, "&Select font...\tCtrl-S",
 196                      "Select a standard font");
 197     menuFont->AppendSeparator();
 198     menuFont->Append(Font_EnumFamilies, "Enumerate font &families\tCtrl-F");
 199     menuFont->Append(Font_EnumFixedFamilies,
 200                      "Enumerate f&ixed font families\tCtrl-I");
 201     menuFont->Append(Font_EnumEncodings,
 202                      "Enumerate &encodings\tCtrl-E");
 203     menuFont->Append(Font_EnumFamiliesForEncoding,
 204                      "Find font for en&coding...\tCtrl-C",
 205                      "Find font families for given encoding");
 206
 207     // now append the freshly created menu to the menu bar...
 208     wxMenuBar *menuBar = new wxMenuBar;
 209     menuBar->Append(menuFile, "&File");
 210     menuBar->Append(menuFont, "F&ont");
 211
 212     // ... and attach this menu bar to the frame
 213     SetMenuBar(menuBar);
 214
 215     m_textctrl = new wxTextCtrl(this, -1,
 216                                 "Paste text here to see how it looks\n"
 217                                 "like in the given font",
 218                                 wxDefaultPosition, wxDefaultSize,
 219                                 wxTE_MULTILINE);
 220
 221     m_canvas = new MyCanvas(this);
 222
 223     // create a status bar just for fun (by default with 1 pane only)
 224     CreateStatusBar();
 225     SetStatusText("Welcome to wxWindows font demo!");
 226 }
 227
 228
 229 // event handlers
 230 void MyFrame::OnEnumerateEncodings(wxCommandEvent& WXUNUSED(event))
 231 {
 232     class MyEncodingEnumerator : public wxFontEnumerator
 233     {
 234     public:
 235         MyEncodingEnumerator() { m_n = 0; }
 236
 237         const wxString& GetText() const { return m_text; }
 238
 239     protected:
 240         virtual bool OnFontEncoding(const wxString& family,
 241                                     const wxString& encoding)
 242         {
 243             wxString text;
 244             text.Printf("Encoding %d: %s (available in family '%s')\n",
 245                          ++m_n, encoding.c_str(), family.c_str());
 246             m_text += text;
 247
 248             return TRUE;
 249         }
 250
 251     private:
 252         size_t m_n;
 253
 254         wxString m_text;
 255     } fontEnumerator;
 256
 257     fontEnumerator.EnumerateEncodings();
 258
 259     wxLogMessage("Enumerating all available encodings:\n%s",
 260                  fontEnumerator.GetText().c_str());
 261 }
 262
 263 void MyFrame::DoEnumerateFamilies(bool fixedWidthOnly, wxFontEncoding encoding)
 264 {
 265     class MyFontEnumerator : public wxFontEnumerator
 266     {
 267     public:
 268         bool GotAny() const { return !m_facenames.IsEmpty(); }
 269
 270         const wxArrayString& GetFacenames() const { return m_facenames; }
 271
 272     protected:
 273         virtual bool OnFontFamily(const wxString& family)
 274         {
 275             m_facenames.Add(family);
 276
 277             return TRUE;
 278         }
 279
 280     private:
 281         wxArrayString m_facenames;
 282     } fontEnumerator;
 283
 284     fontEnumerator.EnumerateFamilies(encoding, fixedWidthOnly);
 285
 286     if ( fontEnumerator.GotAny() )
 287     {
 288         int n, nFacenames = fontEnumerator.GetFacenames().GetCount();
 289         wxLogStatus(this, "Found %d %sfonts",
 290                     nFacenames, fixedWidthOnly ? "fixed width " : "");
 291
 292         wxString *facenames = new wxString[nFacenames];
 293         for ( n = 0; n < nFacenames; n++ )
 294             facenames[n] = fontEnumerator.GetFacenames().Item(n);
 295
 296         n = wxGetSingleChoiceIndex("Choose a facename", "Font demo",
 297                                    nFacenames, facenames, this);
 298         if ( n != -1 )
 299         {
 300             wxFont font(14, wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL,
 301                         wxFONTWEIGHT_NORMAL, FALSE, facenames[n], encoding);
 302
 303             DoChangeFont(font);
 304         }
 305
 306         delete [] facenames;
 307     }
 308     else
 309     {
 310         wxLogWarning("No such fonts found.");
 311     }
 312 }
 313
 314 void MyFrame::OnEnumerateFamiliesForEncoding(wxCommandEvent& WXUNUSED(event))
 315 {
 316     static wxFontEncoding encodings[] =
 317     {
 318         wxFONTENCODING_ISO8859_1,
 319         wxFONTENCODING_ISO8859_2,
 320         wxFONTENCODING_ISO8859_5,
 321         wxFONTENCODING_ISO8859_7,
 322         wxFONTENCODING_ISO8859_15,
 323         wxFONTENCODING_KOI8,
 324         wxFONTENCODING_CP1250,
 325         wxFONTENCODING_CP1251,
 326         wxFONTENCODING_CP1252,
 327     };
 328
 329     static const char *encodingNames[] =
 330     {
 331         "West European (Latin 1)",
 332         "Central European (Latin 2)",
 333         "Cyrillic (Latin 5)",
 334         "Greek (Latin 7)",
 335         "West European new (Latin 0)",
 336         "KOI8-R",
 337         "Windows Latin 2",
 338         "Windows Cyrillic",
 339         "Windows Latin 1",
 340     };
 341
 342     int n = wxGetSingleChoiceIndex("Choose an encoding", "Font demo",
 343                                    WXSIZEOF(encodingNames),
 344                                    (char **)encodingNames,
 345                                    this);
 346
 347     if ( n != -1 )
 348     {
 349         DoEnumerateFamilies(FALSE, encodings[n]);
 350     }
 351 }
 352
 353 void MyFrame::DoChangeFont(const wxFont& font, const wxColour& col)
 354 {
 355     Resize(GetSize(), font);
 356
 357     m_canvas->SetTextFont(font);
 358     if ( col.Ok() )
 359         m_canvas->SetColour(col);
 360     m_canvas->Refresh();
 361
 362     m_textctrl->SetFont(font);
 363     if ( col.Ok() )
 364         m_textctrl->SetForegroundColour(col);
 365 }
 366
 367 void MyFrame::OnSelectFont(wxCommandEvent& WXUNUSED(event))
 368 {
 369     wxFontData data;
 370     data.SetInitialFont(m_canvas->GetTextFont());
 371     data.SetColour(m_canvas->GetColour());
 372
 373     wxFontDialog dialog(this, &data);
 374     if ( dialog.ShowModal() == wxID_OK )
 375     {
 376         wxFontData retData = dialog.GetFontData();
 377         wxFont font = retData.GetChosenFont();
 378         wxColour colour = retData.GetColour();
 379
 380         DoChangeFont(font, colour);
 381     }
 382 }
 383
 384 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 385 {
 386     // TRUE is to force the frame to close
 387     Close(TRUE);
 388 }
 389
 390 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 391 {
 392     wxMessageBox("wxWindows font demo\n"
 393                  "(c) 1999 Vadim Zeitlin",
 394                  "About Font",
 395                  wxOK | wxICON_INFORMATION, this);
 396 }
 397
 398 void MyFrame::OnSize(wxSizeEvent& event)
 399 {
 400     wxSize size = event.GetSize();
 401
 402     Resize(size);
 403
 404     event.Skip();
 405 }
 406
 407 void MyFrame::Resize(const wxSize& size, const wxFont& font)
 408 {
 409     if ( !m_textctrl )
 410         return;
 411
 412     wxCoord h;
 413     if ( font.Ok() )
 414     {
 415         wxClientDC dc(this);
 416         dc.SetFont(font);
 417
 418         h = 4*dc.GetCharHeight() + 4;
 419     }
 420     else
 421     {
 422         h = m_textctrl->GetSize().y;
 423     }
 424
 425     m_textctrl->SetSize(0, 0, size.x, h);
 426     m_canvas->SetSize(0, h, size.x, size.y - h);
 427 }
 428
 429 // ----------------------------------------------------------------------------
 430 // MyCanvas
 431 // ----------------------------------------------------------------------------
 432
 433 BEGIN_EVENT_TABLE(MyCanvas, wxWindow)
 434     EVT_PAINT(MyCanvas::OnPaint)
 435 END_EVENT_TABLE()
 436
 437 MyCanvas::MyCanvas( wxWindow *parent )
 438         : wxWindow( parent, -1 )
 439 {
 440     m_font = *wxNORMAL_FONT;
 441     m_colour = *wxRED;
 442 }
 443
 444 MyCanvas::~MyCanvas()
 445 {
 446 }
 447
 448 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 449 {
 450     wxPaintDC dc(this);
 451     PrepareDC(dc);
 452
 453     // set background
 454     dc.SetBackground(wxBrush("white", wxSOLID));
 455     dc.Clear();
 456
 457     // output the font name/info
 458     wxString fontInfo;
 459     fontInfo.Printf("Font family is '%s', style '%s', weight '%s'",
 460                     m_font.GetFamilyString().c_str(),
 461                     m_font.GetStyleString().c_str(),
 462                     m_font.GetWeightString().c_str());
 463
 464     dc.DrawText(fontInfo, 5, 5);
 465
 466     // prepare to draw the font
 467     dc.SetFont(m_font);
 468     dc.SetTextForeground(m_colour);
 469
 470     // the size of one cell (char + small margin)
 471     int w = dc.GetCharWidth() + 5,
 472         h = dc.GetCharHeight() + 4;
 473
 474     // the origin for our table
 475     int x = 5,
 476         y = 2*h;
 477
 478     // print all font symbols from 32 to 256 in 7 rows of 32 chars each
 479     for ( int i = 1; i < 8; i++ )
 480     {
 481         for ( int j = 0; j < 32; j++ )
 482         {
 483             dc.DrawText(char(32*i + j), x + w*j, y + h*i);
 484         }
 485     }
 486
 487     // draw the lines between them
 488     dc.SetPen(wxPen(wxColour("blue"), 1, wxSOLID));
 489     int l;
 490
 491     // horizontal
 492     y += h;
 493     for ( l = 0; l < 8; l++ )
 494     {
 495         int yl = y + h*l - 2;
 496         dc.DrawLine(x - 2, yl, x + 32*w - 2, yl);
 497     }
 498
 499     // and vertical
 500     for ( l = 0; l < 33; l++ )
 501     {
 502         int xl = x + w*l - 2;
 503         dc.DrawLine(xl, y, xl, y + 7*h - 2);
 504     }
 505 }