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
  90 protected:
  91     void DoEnumerateFamilies(bool fixedWidthOnly);
  92
  93     MyCanvas *m_canvas;
  94
  95 private:
  96     // any class wishing to process wxWindows events must use this macro
  97     DECLARE_EVENT_TABLE()
  98 };
  99
 100 // A custom font dialog which allows to directly edit wxFont proprieties
 101 class MyFontDialog : public wxDialog
 102 {
 103 public:
 104     MyFontDialog(MyFrame *frame);
 105
 106     // event handlers
 107     void OnApply(wxCommandEvent& WXUNUSED(event)) { DoApply(); }
 108
 109 protected:
 110     void DoApply();
 111
 112     MyCanvas *m_canvas;
 113
 114 private:
 115     //DECLARE_EVENT_TABLE() TODO
 116 };
 117
 118 // ----------------------------------------------------------------------------
 119 // constants
 120 // ----------------------------------------------------------------------------
 121
 122 // IDs for the controls and the menu commands
 123 enum
 124 {
 125     // menu items
 126     Font_Quit = 1,
 127     Font_About,
 128     Font_Choose = 100,
 129     Font_Create,
 130     Font_EnumFamilies,
 131     Font_EnumFixedFamilies,
 132     Font_Max
 133 };
 134
 135 // ----------------------------------------------------------------------------
 136 // event tables and other macros for wxWindows
 137 // ----------------------------------------------------------------------------
 138
 139 // the event tables connect the wxWindows events with the functions (event
 140 // handlers) which process them. It can be also done at run-time, but for the
 141 // simple menu events like this the static method is much simpler.
 142 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 143     EVT_MENU(Font_Quit,  MyFrame::OnQuit)
 144     EVT_MENU(Font_About, MyFrame::OnAbout)
 145     EVT_MENU(Font_Choose, MyFrame::OnSelectFont)
 146     EVT_MENU(Font_Create, MyFrame::OnCreateFont)
 147     EVT_MENU(Font_EnumFamilies, MyFrame::OnEnumerateFamilies)
 148     EVT_MENU(Font_EnumFixedFamilies, MyFrame::OnEnumerateFixedFamilies)
 149 END_EVENT_TABLE()
 150
 151 // Create a new application object: this macro will allow wxWindows to create
 152 // the application object during program execution (it's better than using a
 153 // static object for many reasons) and also declares the accessor function
 154 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 155 // not wxApp)
 156 IMPLEMENT_APP(MyApp)
 157
 158 // ============================================================================
 159 // implementation
 160 // ============================================================================
 161
 162 // ----------------------------------------------------------------------------
 163 // the application class
 164 // ----------------------------------------------------------------------------
 165
 166 // `Main program' equivalent: the program execution "starts" here
 167 bool MyApp::OnInit()
 168 {
 169     // Create the main application window
 170     MyFrame *frame = new MyFrame("Font wxWindows demo",
 171                                  wxPoint(50, 50), wxSize(450, 340));
 172
 173     // Show it and tell the application that it's our main window
 174     frame->Show(TRUE);
 175     SetTopWindow(frame);
 176
 177     // success: wxApp::OnRun() will be called which will enter the main message
 178     // loop and the application will run. If we returned FALSE here, the
 179     // application would exit immediately.
 180     return TRUE;
 181 }
 182
 183 // ----------------------------------------------------------------------------
 184 // main frame
 185 // ----------------------------------------------------------------------------
 186
 187 // frame constructor
 188 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 189        : wxFrame((wxFrame *)NULL, -1, title, pos, size)
 190 {
 191     // create a menu bar
 192     wxMenu *menuFile = new wxMenu;
 193
 194     menuFile->Append(Font_About, "&About...\tCtrl-A", "Show about dialog");
 195     menuFile->AppendSeparator();
 196     menuFile->Append(Font_Quit, "E&xit\tAlt-X", "Quit this program");
 197
 198     wxMenu *menuFont = new wxMenu;
 199     menuFont->Append(Font_Choose, "&Select font...\tCtrl-S",
 200                      "Select a standard font");
 201     menuFont->Append(Font_Create, "&Create font...\tCtrl-C",
 202                      "Create a custom font");
 203     menuFont->AppendSeparator();
 204     menuFont->Append(Font_EnumFamilies, "&Enumerate font families\tCtrl-E");
 205     menuFont->Append(Font_EnumFixedFamilies,
 206                      "&Enumerate fixed font families\tCtrl-F");
 207
 208     // now append the freshly created menu to the menu bar...
 209     wxMenuBar *menuBar = new wxMenuBar;
 210     menuBar->Append(menuFile, "&File");
 211     menuBar->Append(menuFont, "F&ont");
 212
 213     // ... and attach this menu bar to the frame
 214     SetMenuBar(menuBar);
 215
 216     m_canvas = new MyCanvas(this);
 217
 218     // create a status bar just for fun (by default with 1 pane only)
 219     CreateStatusBar(2);
 220     SetStatusText("Welcome to wxWindows!");
 221 }
 222
 223
 224 // event handlers
 225
 226 void MyFrame::DoEnumerateFamilies(bool fixedWidthOnly)
 227 {
 228     class MyFontEnumerator : public wxFontEnumerator
 229     {
 230     public:
 231         MyFontEnumerator() { m_n = 0; }
 232
 233     protected:
 234         virtual bool OnFontFamily(const wxString& family)
 235         {
 236             wxLogMessage("Font family %d: %s\n", ++m_n, family.c_str());
 237
 238             return TRUE;
 239         }
 240
 241     private:
 242         size_t m_n;
 243     } fontEnumerator;
 244
 245     wxLogMessage("Enumerating %s font families:",
 246                  fixedWidthOnly ? "fixed width" : "all");
 247     fontEnumerator.EnumerateFamilies(fixedWidthOnly);
 248 }
 249
 250 void MyFrame::OnCreateFont(wxCommandEvent& WXUNUSED(event))
 251 {
 252     MyFontDialog dialog(this);
 253
 254     (void)dialog.ShowModal();
 255 }
 256
 257 void MyFrame::OnSelectFont(wxCommandEvent& WXUNUSED(event))
 258 {
 259     wxFontData data;
 260     data.SetInitialFont(m_canvas->GetTextFont());
 261     data.SetColour(m_canvas->GetColour());
 262
 263     wxFontDialog dialog(this, &data);
 264     if ( dialog.ShowModal() == wxID_OK )
 265     {
 266         wxFontData retData = dialog.GetFontData();
 267         m_canvas->SetTextFont(retData.GetChosenFont());
 268         m_canvas->SetColour(retData.GetColour());
 269         m_canvas->Refresh();
 270     }
 271 }
 272
 273 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 274 {
 275     // TRUE is to force the frame to close
 276     Close(TRUE);
 277 }
 278
 279 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 280 {
 281     wxMessageBox("wxWindows font demo.", "About Font",
 282                  wxOK | wxICON_INFORMATION, this);
 283 }
 284
 285
 286 // ----------------------------------------------------------------------------
 287 // MyCanvas
 288 // ----------------------------------------------------------------------------
 289
 290 BEGIN_EVENT_TABLE(MyCanvas, wxWindow)
 291     EVT_PAINT(MyCanvas::OnPaint)
 292 END_EVENT_TABLE()
 293
 294 MyCanvas::MyCanvas( wxWindow *parent )
 295         : wxWindow( parent, -1 )
 296 {
 297     m_font = *wxNORMAL_FONT;
 298     m_colour = *wxRED;
 299 }
 300
 301 MyCanvas::~MyCanvas()
 302 {
 303 }
 304
 305 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 306 {
 307     wxPaintDC dc(this);
 308     PrepareDC(dc);
 309
 310     // set background
 311     dc.SetBackground(wxBrush("white", wxSOLID));
 312     dc.Clear();
 313
 314     // output the font name/info
 315     wxString fontInfo;
 316     fontInfo.Printf("Font family is '%s', style '%s', weight '%s'",
 317                     m_font.GetFamilyString().c_str(),
 318                     m_font.GetStyleString().c_str(),
 319                     m_font.GetWeightString().c_str());
 320
 321     dc.DrawText(fontInfo, 5, 5);
 322
 323     // prepare to draw the font
 324     dc.SetFont(m_font);
 325     dc.SetTextForeground(m_colour);
 326
 327     // the size of one cell (char + small margin)
 328     int w = dc.GetCharWidth() + 5,
 329         h = dc.GetCharHeight() + 4;
 330
 331     // the origin for our table
 332     int x = 5,
 333         y = 2*h + 5;
 334
 335     // print all font symbols from 32 to 256 in 7 rows of 32 chars each
 336     for ( int i = 1; i < 8; i++ )
 337     {
 338         for ( int j = 0; j < 32; j++ )
 339         {
 340             dc.DrawText(char(32*i + j), x + w*j, y + h*i);
 341         }
 342     }
 343
 344     // draw the lines between them
 345     dc.SetPen(wxPen(wxColour("blue"), 1, wxSOLID));
 346     int l;
 347
 348     // horizontal
 349     y += h;
 350     for ( l = 0; l < 8; l++ )
 351     {
 352         int yl = y + h*l - 2;
 353         dc.DrawLine(x - 2, yl, x + 32*w - 2, yl);
 354     }
 355
 356     // and vertical
 357     for ( l = 0; l < 33; l++ )
 358     {
 359         int xl = x + w*l - 2;
 360         dc.DrawLine(xl, y, xl, y + 7*h - 2);
 361     }
 362 }
 363
 364 // ----------------------------------------------------------------------------
 365 // MyFontDialog
 366 // ----------------------------------------------------------------------------
 367
 368 MyFontDialog::MyFontDialog(MyFrame *frame)
 369             : wxDialog(frame, -1, wxString("Edit font attributes"))
 370 {
 371     m_canvas = frame->GetCanvas();
 372
 373     // create controls
 374     wxSize sizeBtn = wxButton::GetDefaultSize();
 375
 376     // TODO
 377
 378     // position and size the dialog
 379     SetClientSize(4*sizeBtn.x, 10*sizeBtn.y);
 380     Centre();
 381 }
 382
 383 void MyFontDialog::DoApply()
 384 {
 385     wxFont font; //(size, family, style, weight, underlined, face, encoding);
 386     if ( !font.Ok() )
 387     {
 388         wxLogError("Font creation failed.");
 389     }
 390     else
 391     {
 392         m_canvas->SetTextFont(font);
 393         m_canvas->Refresh();
 394     }
 395 }