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) 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/fontdlg.h>
  28 #include <wx/fontenum.h>
  29
  30 // ----------------------------------------------------------------------------
  31 // private classes
  32 // ----------------------------------------------------------------------------
  33
  34 // Define a new application type, each program should derive a class from wxApp
  35 class MyApp : public wxApp
  36 {
  37 public:
  38     // override base class virtuals
  39     // ----------------------------
  40
  41     // this one is called on application startup and is a good place for the app
  42     // initialization (doing it here and not in the ctor allows to have an error
  43     // return: if OnInit() returns false, the application terminates)
  44     virtual bool OnInit();
  45 };
  46
  47 // MyCanvas is a canvas on which we show the font sample
  48 class MyCanvas: public wxWindow
  49 {
  50 public:
  51     MyCanvas( wxWindow *parent );
  52     ~MyCanvas();
  53
  54     // accessors for the frame
  55     const wxFont& GetTextFont() const { return m_font; }
  56     const wxColour& GetColour() const { return m_colour; }
  57     void SetTextFont(const wxFont& font) { m_font = font; }
  58     void SetColour(const wxColour& colour) { m_colour = colour; }
  59
  60     // event handlers
  61     void OnPaint( wxPaintEvent &event );
  62
  63 private:
  64     wxColour m_colour;
  65     wxFont   m_font;
  66
  67     DECLARE_EVENT_TABLE()
  68 };
  69
  70 // Define a new frame type: this is going to be our main frame
  71 class MyFrame : public wxFrame
  72 {
  73 public:
  74     // ctor(s)
  75     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
  76
  77     // accessors
  78     MyCanvas *GetCanvas() const { return m_canvas; }
  79
  80     // event handlers (these functions should _not_ be virtual)
  81     void OnQuit(wxCommandEvent& event);
  82     void OnAbout(wxCommandEvent& event);
  83     void OnSelectFont(wxCommandEvent& event);
  84     void OnCreateFont(wxCommandEvent& event);
  85     void OnEnumerateFamilies(wxCommandEvent& WXUNUSED(event))
  86         { DoEnumerateFamilies(FALSE); }
  87     void OnEnumerateFixedFamilies(wxCommandEvent& WXUNUSED(event))
  88         { DoEnumerateFamilies(TRUE); }
  89     void OnEnumerateEncodings(wxCommandEvent& event);
  90
  91 protected:
  92     void DoEnumerateFamilies(bool fixedWidthOnly);
  93
  94     MyCanvas *m_canvas;
  95
  96 private:
  97     // any class wishing to process wxWindows events must use this macro
  98     DECLARE_EVENT_TABLE()
  99 };
 100
 101 // A custom font dialog which allows to directly edit wxFont proprieties
 102 class MyFontDialog : public wxDialog
 103 {
 104 public:
 105     MyFontDialog(MyFrame *frame);
 106
 107     // event handlers
 108     void OnApply(wxCommandEvent& WXUNUSED(event)) { DoApply(); }
 109
 110 protected:
 111     void DoApply();
 112
 113     MyCanvas *m_canvas;
 114
 115 private:
 116     //DECLARE_EVENT_TABLE() TODO
 117 };
 118
 119 // ----------------------------------------------------------------------------
 120 // constants
 121 // ----------------------------------------------------------------------------
 122
 123 // IDs for the controls and the menu commands
 124 enum
 125 {
 126     // menu items
 127     Font_Quit = 1,
 128     Font_About,
 129     Font_Choose = 100,
 130     Font_Create,
 131     Font_EnumFamilies,
 132     Font_EnumFixedFamilies,
 133     Font_EnumEncodings,
 134     Font_Max
 135 };
 136
 137 // ----------------------------------------------------------------------------
 138 // event tables and other macros for wxWindows
 139 // ----------------------------------------------------------------------------
 140
 141 // the event tables connect the wxWindows events with the functions (event
 142 // handlers) which process them. It can be also done at run-time, but for the
 143 // simple menu events like this the static method is much simpler.
 144 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 145     EVT_MENU(Font_Quit,  MyFrame::OnQuit)
 146     EVT_MENU(Font_About, MyFrame::OnAbout)
 147     EVT_MENU(Font_Choose, MyFrame::OnSelectFont)
 148     EVT_MENU(Font_Create, MyFrame::OnCreateFont)
 149     EVT_MENU(Font_EnumFamilies, MyFrame::OnEnumerateFamilies)
 150     EVT_MENU(Font_EnumFixedFamilies, MyFrame::OnEnumerateFixedFamilies)
 151     EVT_MENU(Font_EnumEncodings, MyFrame::OnEnumerateEncodings)
 152 END_EVENT_TABLE()
 153
 154 // Create a new application object: this macro will allow wxWindows to create
 155 // the application object during program execution (it's better than using a
 156 // static object for many reasons) and also declares the accessor function
 157 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 158 // not wxApp)
 159 IMPLEMENT_APP(MyApp)
 160
 161 // ============================================================================
 162 // implementation
 163 // ============================================================================
 164
 165 // ----------------------------------------------------------------------------
 166 // the application class
 167 // ----------------------------------------------------------------------------
 168
 169 // `Main program' equivalent: the program execution "starts" here
 170 bool MyApp::OnInit()
 171 {
 172     // Create the main application window
 173     MyFrame *frame = new MyFrame("Font wxWindows demo",
 174                                  wxPoint(50, 50), wxSize(450, 340));
 175
 176     // Show it and tell the application that it's our main window
 177     frame->Show(TRUE);
 178     SetTopWindow(frame);
 179
 180     // success: wxApp::OnRun() will be called which will enter the main message
 181     // loop and the application will run. If we returned FALSE here, the
 182     // application would exit immediately.
 183     return TRUE;
 184 }
 185
 186 // ----------------------------------------------------------------------------
 187 // main frame
 188 // ----------------------------------------------------------------------------
 189
 190 // frame constructor
 191 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 192        : wxFrame((wxFrame *)NULL, -1, title, pos, size)
 193 {
 194     // create a menu bar
 195     wxMenu *menuFile = new wxMenu;
 196
 197     menuFile->Append(Font_About, "&About...\tCtrl-A", "Show about dialog");
 198     menuFile->AppendSeparator();
 199     menuFile->Append(Font_Quit, "E&xit\tAlt-X", "Quit this program");
 200
 201     wxMenu *menuFont = new wxMenu;
 202     menuFont->Append(Font_Choose, "&Select font...\tCtrl-S",
 203                      "Select a standard font");
 204     menuFont->Append(Font_Create, "&Create font...\tCtrl-C",
 205                      "Create a custom font");
 206     menuFont->AppendSeparator();
 207     menuFont->Append(Font_EnumFamilies, "Enumerate font &families\tCtrl-F");
 208     menuFont->Append(Font_EnumFixedFamilies,
 209                      "Enumerate f&ixed font families\tCtrl-I");
 210     menuFont->Append(Font_EnumEncodings,
 211                      "Enumerate &encodings\tCtrl-E");
 212
 213     // now append the freshly created menu to the menu bar...
 214     wxMenuBar *menuBar = new wxMenuBar;
 215     menuBar->Append(menuFile, "&File");
 216     menuBar->Append(menuFont, "F&ont");
 217
 218     // ... and attach this menu bar to the frame
 219     SetMenuBar(menuBar);
 220
 221     m_canvas = new MyCanvas(this);
 222
 223     // create a status bar just for fun (by default with 1 pane only)
 224     CreateStatusBar(2);
 225     SetStatusText("Welcome to wxWindows!");
 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)
 264 {
 265     class MyFontEnumerator : public wxFontEnumerator
 266     {
 267     public:
 268         MyFontEnumerator() { m_n = 0; }
 269
 270         const wxString& GetText() const { return m_text; }
 271
 272     protected:
 273         virtual bool OnFontFamily(const wxString& family)
 274         {
 275             wxString text;
 276             text.Printf("Font family %d: %s\n", ++m_n, family.c_str());
 277             m_text += text;
 278
 279             return TRUE;
 280         }
 281
 282     private:
 283         size_t m_n;
 284
 285         wxString m_text;
 286     } fontEnumerator;
 287
 288     fontEnumerator.EnumerateFamilies(fixedWidthOnly);
 289
 290     wxLogMessage("Enumerating %s font families:\n%s",
 291                  fixedWidthOnly ? "fixed width" : "all",
 292                  fontEnumerator.GetText().c_str());
 293 }
 294
 295 void MyFrame::OnCreateFont(wxCommandEvent& WXUNUSED(event))
 296 {
 297     MyFontDialog dialog(this);
 298
 299     (void)dialog.ShowModal();
 300 }
 301
 302 void MyFrame::OnSelectFont(wxCommandEvent& WXUNUSED(event))
 303 {
 304     wxFontData data;
 305     data.SetInitialFont(m_canvas->GetTextFont());
 306     data.SetColour(m_canvas->GetColour());
 307
 308     wxFontDialog dialog(this, &data);
 309     if ( dialog.ShowModal() == wxID_OK )
 310     {
 311         wxFontData retData = dialog.GetFontData();
 312         m_canvas->SetTextFont(retData.GetChosenFont());
 313         m_canvas->SetColour(retData.GetColour());
 314         m_canvas->Refresh();
 315     }
 316 }
 317
 318 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 319 {
 320     // TRUE is to force the frame to close
 321     Close(TRUE);
 322 }
 323
 324 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 325 {
 326     wxMessageBox("wxWindows font demo.", "About Font",
 327                  wxOK | wxICON_INFORMATION, this);
 328 }
 329
 330
 331 // ----------------------------------------------------------------------------
 332 // MyCanvas
 333 // ----------------------------------------------------------------------------
 334
 335 BEGIN_EVENT_TABLE(MyCanvas, wxWindow)
 336     EVT_PAINT(MyCanvas::OnPaint)
 337 END_EVENT_TABLE()
 338
 339 MyCanvas::MyCanvas( wxWindow *parent )
 340         : wxWindow( parent, -1 )
 341 {
 342     m_font = *wxNORMAL_FONT;
 343     m_colour = *wxRED;
 344 }
 345
 346 MyCanvas::~MyCanvas()
 347 {
 348 }
 349
 350 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 351 {
 352     wxPaintDC dc(this);
 353     PrepareDC(dc);
 354
 355     // set background
 356     dc.SetBackground(wxBrush("white", wxSOLID));
 357     dc.Clear();
 358
 359     // output the font name/info
 360     wxString fontInfo;
 361     fontInfo.Printf("Font family is '%s', style '%s', weight '%s'",
 362                     m_font.GetFamilyString().c_str(),
 363                     m_font.GetStyleString().c_str(),
 364                     m_font.GetWeightString().c_str());
 365
 366     dc.DrawText(fontInfo, 5, 5);
 367
 368     // prepare to draw the font
 369     dc.SetFont(m_font);
 370     dc.SetTextForeground(m_colour);
 371
 372     // the size of one cell (char + small margin)
 373     int w = dc.GetCharWidth() + 5,
 374         h = dc.GetCharHeight() + 4;
 375
 376     // the origin for our table
 377     int x = 5,
 378         y = 2*h + 5;
 379
 380     // print all font symbols from 32 to 256 in 7 rows of 32 chars each
 381     for ( int i = 1; i < 8; i++ )
 382     {
 383         for ( int j = 0; j < 32; j++ )
 384         {
 385             dc.DrawText(char(32*i + j), x + w*j, y + h*i);
 386         }
 387     }
 388
 389     // draw the lines between them
 390     dc.SetPen(wxPen(wxColour("blue"), 1, wxSOLID));
 391     int l;
 392
 393     // horizontal
 394     y += h;
 395     for ( l = 0; l < 8; l++ )
 396     {
 397         int yl = y + h*l - 2;
 398         dc.DrawLine(x - 2, yl, x + 32*w - 2, yl);
 399     }
 400
 401     // and vertical
 402     for ( l = 0; l < 33; l++ )
 403     {
 404         int xl = x + w*l - 2;
 405         dc.DrawLine(xl, y, xl, y + 7*h - 2);
 406     }
 407 }
 408
 409 // ----------------------------------------------------------------------------
 410 // MyFontDialog
 411 // ----------------------------------------------------------------------------
 412
 413 MyFontDialog::MyFontDialog(MyFrame *frame)
 414             : wxDialog(frame, -1, wxString("Edit font attributes"))
 415 {
 416     m_canvas = frame->GetCanvas();
 417
 418     // create controls
 419     wxSize sizeBtn = wxButton::GetDefaultSize();
 420
 421     // TODO
 422
 423     // position and size the dialog
 424     SetClientSize(4*sizeBtn.x, 10*sizeBtn.y);
 425     Centre();
 426 }
 427
 428 void MyFontDialog::DoApply()
 429 {
 430     wxFont font; //(size, family, style, weight, underlined, face, encoding);
 431     if ( !font.Ok() )
 432     {
 433         wxLogError("Font creation failed.");
 434     }
 435     else
 436     {
 437         m_canvas->SetTextFont(font);
 438         m_canvas->Refresh();
 439     }
 440 }