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
  29 // ----------------------------------------------------------------------------
  30 // private classes
  31 // ----------------------------------------------------------------------------
  32
  33 // Define a new application type, each program should derive a class from wxApp
  34 class MyApp : public wxApp
  35 {
  36 public:
  37     // override base class virtuals
  38     // ----------------------------
  39
  40     // this one is called on application startup and is a good place for the app
  41     // initialization (doing it here and not in the ctor allows to have an error
  42     // return: if OnInit() returns false, the application terminates)
  43     virtual bool OnInit();
  44 };
  45
  46 // MyCanvas is a canvas on which we show the font sample
  47 class MyCanvas: public wxWindow
  48 {
  49 public:
  50     MyCanvas( wxWindow *parent );
  51     ~MyCanvas();
  52
  53     // accessors for the frame
  54     const wxFont& GetTextFont() const { return m_font; }
  55     const wxColour& GetColour() const { return m_colour; }
  56     void SetTextFont(const wxFont& font) { m_font = font; }
  57     void SetColour(const wxColour& colour) { m_colour = colour; }
  58
  59     // event handlers
  60     void OnPaint( wxPaintEvent &event );
  61
  62 private:
  63     wxColour m_colour;
  64     wxFont   m_font;
  65
  66     DECLARE_EVENT_TABLE()
  67 };
  68
  69 // Define a new frame type: this is going to be our main frame
  70 class MyFrame : public wxFrame
  71 {
  72 public:
  73     // ctor(s)
  74     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
  75
  76     // accessors
  77     MyCanvas *GetCanvas() const { return m_canvas; }
  78
  79     // event handlers (these functions should _not_ be virtual)
  80     void OnQuit(wxCommandEvent& event);
  81     void OnAbout(wxCommandEvent& event);
  82     void OnSelectFont(wxCommandEvent& event);
  83     void OnCreateFont(wxCommandEvent& event);
  84
  85 protected:
  86     MyCanvas *m_canvas;
  87
  88 private:
  89     // any class wishing to process wxWindows events must use this macro
  90     DECLARE_EVENT_TABLE()
  91 };
  92
  93 // A custom font dialog which allows to directly edit wxFont proprieties
  94 class MyFontDialog : public wxDialog
  95 {
  96 public:
  97     MyFontDialog(MyFrame *frame);
  98
  99     // event handlers
 100     void OnApply(wxCommandEvent& WXUNUSED(event)) { DoApply(); }
 101
 102 protected:
 103     void DoApply();
 104
 105     MyCanvas *m_canvas;
 106
 107 private:
 108     //DECLARE_EVENT_TABLE() TODO
 109 };
 110
 111 // ----------------------------------------------------------------------------
 112 // constants
 113 // ----------------------------------------------------------------------------
 114
 115 // IDs for the controls and the menu commands
 116 enum
 117 {
 118     // menu items
 119     Font_Quit = 1,
 120     Font_About,
 121     Font_Choose = 100,
 122     Font_Create
 123 };
 124
 125 // ----------------------------------------------------------------------------
 126 // event tables and other macros for wxWindows
 127 // ----------------------------------------------------------------------------
 128
 129 // the event tables connect the wxWindows events with the functions (event
 130 // handlers) which process them. It can be also done at run-time, but for the
 131 // simple menu events like this the static method is much simpler.
 132 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 133     EVT_MENU(Font_Quit,  MyFrame::OnQuit)
 134     EVT_MENU(Font_About, MyFrame::OnAbout)
 135     EVT_MENU(Font_Choose, MyFrame::OnSelectFont)
 136     EVT_MENU(Font_Create, MyFrame::OnCreateFont)
 137 END_EVENT_TABLE()
 138
 139 // Create a new application object: this macro will allow wxWindows to create
 140 // the application object during program execution (it's better than using a
 141 // static object for many reasons) and also declares the accessor function
 142 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 143 // not wxApp)
 144 IMPLEMENT_APP(MyApp)
 145
 146 // ============================================================================
 147 // implementation
 148 // ============================================================================
 149
 150 // ----------------------------------------------------------------------------
 151 // the application class
 152 // ----------------------------------------------------------------------------
 153
 154 // `Main program' equivalent: the program execution "starts" here
 155 bool MyApp::OnInit()
 156 {
 157     // Create the main application window
 158     MyFrame *frame = new MyFrame("Minimal wxWindows App",
 159                                  wxPoint(50, 50), wxSize(450, 340));
 160
 161     // Show it and tell the application that it's our main window
 162     frame->Show(TRUE);
 163     SetTopWindow(frame);
 164
 165     // success: wxApp::OnRun() will be called which will enter the main message
 166     // loop and the application will run. If we returned FALSE here, the
 167     // application would exit immediately.
 168     return TRUE;
 169 }
 170
 171 // ----------------------------------------------------------------------------
 172 // main frame
 173 // ----------------------------------------------------------------------------
 174
 175 // frame constructor
 176 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 177        : wxFrame((wxFrame *)NULL, -1, title, pos, size)
 178 {
 179     // set the frame icon
 180     SetIcon(wxICON(mondrian));
 181
 182     // create a menu bar
 183     wxMenu *menuFile = new wxMenu;
 184
 185     menuFile->Append(Font_About, "&About...\tCtrl-A", "Show about dialog");
 186     menuFile->AppendSeparator();
 187     menuFile->Append(Font_Quit, "E&xit\tAlt-X", "Quit this program");
 188
 189     wxMenu *menuFont = new wxMenu;
 190     menuFont->Append(Font_Choose, "&Select font...\tCtrl-F",
 191                      "Select a standard font");
 192     menuFont->Append(Font_Create, "&Create font...\tCtrl-C",
 193                      "Create a custom font");
 194
 195     // now append the freshly created menu to the menu bar...
 196     wxMenuBar *menuBar = new wxMenuBar;
 197     menuBar->Append(menuFile, "&File");
 198     menuBar->Append(menuFont, "F&ont");
 199
 200     // ... and attach this menu bar to the frame
 201     SetMenuBar(menuBar);
 202
 203     m_canvas = new MyCanvas(this);
 204
 205     // create a status bar just for fun (by default with 1 pane only)
 206     CreateStatusBar(2);
 207     SetStatusText("Welcome to wxWindows!");
 208 }
 209
 210
 211 // event handlers
 212
 213 void MyFrame::OnCreateFont(wxCommandEvent& WXUNUSED(event))
 214 {
 215     MyFontDialog dialog(this);
 216
 217     (void)dialog.ShowModal();
 218 }
 219
 220 void MyFrame::OnSelectFont(wxCommandEvent& WXUNUSED(event))
 221 {
 222     wxFontData data;
 223     data.SetInitialFont(m_canvas->GetTextFont());
 224     data.SetColour(m_canvas->GetColour());
 225
 226     wxFontDialog dialog(this, &data);
 227     if ( dialog.ShowModal() == wxID_OK )
 228     {
 229         wxFontData retData = dialog.GetFontData();
 230         m_canvas->SetTextFont(retData.GetChosenFont());
 231         m_canvas->SetColour(retData.GetColour());
 232         m_canvas->Refresh();
 233     }
 234 }
 235
 236 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 237 {
 238     // TRUE is to force the frame to close
 239     Close(TRUE);
 240 }
 241
 242 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 243 {
 244     wxMessageBox("wxWindows font demo.", "About Font",
 245                  wxOK | wxICON_INFORMATION, this);
 246 }
 247
 248
 249 // ----------------------------------------------------------------------------
 250 // MyCanvas
 251 // ----------------------------------------------------------------------------
 252
 253 BEGIN_EVENT_TABLE(MyCanvas, wxWindow)
 254     EVT_PAINT(MyCanvas::OnPaint)
 255 END_EVENT_TABLE()
 256
 257 MyCanvas::MyCanvas( wxWindow *parent )
 258         : wxWindow( parent, -1 )
 259 {
 260     m_font = *wxNORMAL_FONT;
 261     m_colour = *wxRED;
 262 }
 263
 264 MyCanvas::~MyCanvas()
 265 {
 266 }
 267
 268 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 269 {
 270     wxPaintDC dc(this);
 271     PrepareDC(dc);
 272
 273     // set background
 274     dc.SetBackground(wxBrush("white", wxSOLID));
 275     dc.Clear();
 276
 277     // output the font name/info
 278     wxString fontInfo;
 279     fontInfo.Printf("Font family is '%s', style '%s', weight '%s'",
 280                     m_font.GetFamilyString().c_str(),
 281                     m_font.GetStyleString().c_str(),
 282                     m_font.GetWeightString().c_str());
 283
 284     dc.DrawText(fontInfo, 5, 5);
 285
 286     // prepare to draw the font
 287     dc.SetFont(m_font);
 288     dc.SetTextForeground(m_colour);
 289
 290     // the size of one cell (char + small margin)
 291     int w = dc.GetCharWidth() + 5,
 292         h = dc.GetCharHeight() + 4;
 293
 294     // the origin for our table
 295     int x = 5,
 296         y = 2*h + 5;
 297
 298     // print all font symbols from 32 to 256 in 7 rows of 32 chars each
 299     for ( int i = 1; i < 8; i++ )
 300     {
 301         for ( int j = 0; j < 32; j++ )
 302         {
 303             dc.DrawText(char(32*i + j), x + w*j, y + h*i);
 304         }
 305     }
 306
 307     // draw the lines between them
 308     dc.SetPen(wxPen(wxColour("blue"), 1, wxSOLID));
 309     int l;
 310
 311     // horizontal
 312     y += h;
 313     for ( l = 0; l < 8; l++ )
 314     {
 315         int yl = y + h*l - 2;
 316         dc.DrawLine(x - 2, yl, x + 32*w - 2, yl);
 317     }
 318
 319     // and vertical
 320     for ( l = 0; l < 33; l++ )
 321     {
 322         int xl = x + w*l - 2;
 323         dc.DrawLine(xl, y, xl, y + 7*h - 2);
 324     }
 325 }
 326
 327 // ----------------------------------------------------------------------------
 328 // MyFontDialog
 329 // ----------------------------------------------------------------------------
 330
 331 MyFontDialog::MyFontDialog(MyFrame *frame)
 332             : wxDialog(frame, -1, wxString("Edit font attributes"))
 333 {
 334     m_canvas = frame->GetCanvas();
 335
 336     // create controls
 337     wxSize sizeBtn = wxButton::GetDefaultSize();
 338
 339     // TODO
 340
 341     // position and size the dialog
 342     SetClientSize(4*sizeBtn.x, 10*sizeBtn.y);
 343     Centre();
 344 }
 345
 346 void MyFontDialog::DoApply()
 347 {
 348     wxFont font; //(size, family, style, weight, underlined, face, encoding);
 349     if ( !font.Ok() )
 350     {
 351         wxLogError("Font creation failed.");
 352     }
 353     else
 354     {
 355         m_canvas->SetTextFont(font);
 356         m_canvas->Refresh();
 357     }
 358 }