samples/keyboard/keyboard.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        keyboard.cpp
   3 // Purpose:     Keyboard wxWidgets sample
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     07.04.02
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2002 Vadim Zeitlin
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx/wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 // for all others, include the necessary headers (this file is usually all you
  28 // need because it includes almost all "standard" wxWidgets headers)
  29 #ifndef WX_PRECOMP
  30     #include "wx/wx.h"
  31 #endif
  32
  33 // ----------------------------------------------------------------------------
  34 // private classes
  35 // ----------------------------------------------------------------------------
  36
  37 // Define a new application type, each program should derive a class from wxApp
  38 class MyApp : public wxApp
  39 {
  40 public:
  41     // override base class virtuals
  42     // ----------------------------
  43
  44     // this one is called on application startup and is a good place for the app
  45     // initialization (doing it here and not in the ctor allows to have an error
  46     // return: if OnInit() returns false, the application terminates)
  47     virtual bool OnInit();
  48 };
  49
  50 // Define a new frame type: this is going to be our main frame
  51 class MyFrame : public wxFrame
  52 {
  53 public:
  54     // ctor(s)
  55     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size,
  56             long style = wxDEFAULT_FRAME_STYLE);
  57
  58     ~MyFrame() { delete m_logTarget; }
  59
  60     // event handlers (these functions should _not_ be virtual)
  61     void OnQuit(wxCommandEvent& event);
  62     void OnAbout(wxCommandEvent& event);
  63     void OnClear(wxCommandEvent& event);
  64     void OnSkip(wxCommandEvent& event);
  65     void OnShowRaw(wxCommandEvent& event);
  66
  67     void OnSize(wxSizeEvent& event);
  68
  69 private:
  70     wxLog *m_logTarget;
  71
  72     class TextWindow *m_winText;
  73     wxListBox *m_lboxLog;
  74
  75     // any class wishing to process wxWidgets events must use this macro
  76     DECLARE_EVENT_TABLE()
  77 };
  78
  79 // A log target which just redirects the messages to a listbox
  80 class LboxLogger : public wxLog
  81 {
  82 public:
  83     LboxLogger(wxListBox *lbox, wxLog *logOld)
  84     {
  85         m_lbox = lbox;
  86         //m_lbox->Disable(); -- looks ugly under MSW
  87         m_logOld = logOld;
  88     }
  89
  90     virtual ~LboxLogger()
  91     {
  92         wxLog::SetActiveTarget(m_logOld);
  93     }
  94
  95 private:
  96     // implement sink functions
  97     virtual void DoLog(wxLogLevel level, const wxChar *szString, time_t t)
  98     {
  99         // don't put trace messages into listbox or we can get into infinite
 100         // recursion
 101         if ( level == wxLOG_Trace )
 102         {
 103             if ( m_logOld )
 104             {
 105                 // cast is needed to call protected method
 106                 ((LboxLogger *)m_logOld)->DoLog(level, szString, t);
 107             }
 108         }
 109         else
 110         {
 111             wxLog::DoLog(level, szString, t);
 112         }
 113     }
 114
 115     virtual void DoLogString(const wxChar *szString, time_t WXUNUSED(t))
 116     {
 117         wxString msg;
 118         TimeStamp(&msg);
 119         msg += szString;
 120
 121         #ifdef __WXUNIVERSAL__
 122             m_lbox->AppendAndEnsureVisible(msg);
 123         #else // other ports don't have this method yet
 124             m_lbox->Append(msg);
 125             m_lbox->SetFirstItem(m_lbox->GetCount() - 1);
 126         #endif
 127     }
 128
 129     // the control we use
 130     wxListBox *m_lbox;
 131
 132     // the old log target
 133     wxLog *m_logOld;
 134 };
 135
 136 class TextWindow : public wxWindow
 137 {
 138 public:
 139     TextWindow(wxWindow *parent)
 140         : wxWindow(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize,
 141                    wxRAISED_BORDER)
 142     {
 143         m_skip = true;
 144         m_showRaw = false;
 145
 146         SetBackgroundColour(*wxBLUE);
 147     }
 148
 149     void SetSkip(bool skip) { m_skip = skip; }
 150     void SetShowRaw(bool show) { m_showRaw = show; }
 151
 152 protected:
 153     void OnKeyDown(wxKeyEvent& event) { LogEvent(_T("Key down"), event); }
 154     void OnKeyUp(wxKeyEvent& event) { LogEvent(_T("Key up"), event); }
 155     void OnChar(wxKeyEvent& event) { LogEvent(_T("Char"), event); }
 156
 157     void OnPaint(wxPaintEvent& WXUNUSED(event))
 158     {
 159         wxPaintDC dc(this);
 160         dc.SetTextForeground(*wxWHITE);
 161         dc.DrawLabel(_T("Press keys here"), GetClientRect(), wxALIGN_CENTER);
 162     }
 163
 164 private:
 165     static inline wxChar GetChar(bool on, wxChar c) { return on ? c : _T('-'); }
 166
 167     void LogEvent(const wxChar *name, wxKeyEvent& event);
 168
 169     bool m_skip;
 170     bool m_showRaw;
 171
 172     DECLARE_EVENT_TABLE()
 173 };
 174
 175 BEGIN_EVENT_TABLE(TextWindow, wxWindow)
 176     EVT_KEY_DOWN(TextWindow::OnKeyDown)
 177     EVT_KEY_UP(TextWindow::OnKeyUp)
 178     EVT_CHAR(TextWindow::OnChar)
 179
 180     EVT_PAINT(TextWindow::OnPaint)
 181 END_EVENT_TABLE()
 182
 183 // ----------------------------------------------------------------------------
 184 // constants
 185 // ----------------------------------------------------------------------------
 186
 187 // IDs for the controls and the menu commands
 188 enum
 189 {
 190     // menu items
 191     Keyboard_Quit = 1,
 192
 193     Keyboard_Clear,
 194     Keyboard_Skip,
 195     Keyboard_ShowRaw,
 196
 197     // it is important for the id corresponding to the "About" command to have
 198     // this standard value as otherwise it won't be handled properly under Mac
 199     // (where it is special and put into the "Apple" menu)
 200     Keyboard_About = wxID_ABOUT
 201 };
 202
 203 // ----------------------------------------------------------------------------
 204 // event tables and other macros for wxWidgets
 205 // ----------------------------------------------------------------------------
 206
 207 // the event tables connect the wxWidgets events with the functions (event
 208 // handlers) which process them. It can be also done at run-time, but for the
 209 // simple menu events like this the static method is much simpler.
 210 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 211     EVT_MENU(Keyboard_Quit,  MyFrame::OnQuit)
 212     EVT_MENU(Keyboard_About, MyFrame::OnAbout)
 213
 214     EVT_MENU(Keyboard_Clear, MyFrame::OnClear)
 215     EVT_MENU(Keyboard_Skip, MyFrame::OnSkip)
 216     EVT_MENU(Keyboard_ShowRaw, MyFrame::OnShowRaw)
 217
 218     EVT_SIZE(MyFrame::OnSize)
 219 END_EVENT_TABLE()
 220
 221 // Create a new application object: this macro will allow wxWidgets to create
 222 // the application object during program execution (it's better than using a
 223 // static object for many reasons) and also declares the accessor function
 224 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 225 // not wxApp)
 226 IMPLEMENT_APP(MyApp)
 227
 228 // ============================================================================
 229 // implementation
 230 // ============================================================================
 231
 232 // ----------------------------------------------------------------------------
 233 // the application class
 234 // ----------------------------------------------------------------------------
 235
 236 // 'Main program' equivalent: the program execution "starts" here
 237 bool MyApp::OnInit()
 238 {
 239     // create the main application window
 240     MyFrame *frame = new MyFrame(_T("Keyboard wxWidgets App"),
 241                                  wxPoint(50, 50), wxSize(450, 340));
 242
 243     // and show it (the frames, unlike simple controls, are not shown when
 244     // created initially)
 245     frame->Show(true);
 246
 247     // success: wxApp::OnRun() will be called which will enter the main message
 248     // loop and the application will run. If we returned false here, the
 249     // application would exit immediately.
 250     return true;
 251 }
 252
 253 // ----------------------------------------------------------------------------
 254 // main frame
 255 // ----------------------------------------------------------------------------
 256
 257 // frame constructor
 258 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size, long style)
 259        : wxFrame(NULL, wxID_ANY, title, pos, size, style),
 260          m_winText(NULL)
 261 {
 262 #if wxUSE_MENUS
 263     // create a menu bar
 264     wxMenu *menuFile = new wxMenu;
 265     menuFile->Append(Keyboard_Clear, _T("&Clear log\tCtrl-L"));
 266     menuFile->AppendSeparator();
 267     menuFile->Append(Keyboard_Quit, _T("E&xit\tAlt-X"), _T("Quit this program"));
 268
 269     wxMenu *menuKeys = new wxMenu;
 270     menuKeys->AppendCheckItem(Keyboard_ShowRaw, _T("Show &raw keys\tCtrl-R"));
 271     menuKeys->AppendSeparator();
 272     menuKeys->AppendCheckItem(Keyboard_Skip, _T("&Skip key down\tCtrl-S"));
 273
 274     // the "About" item should be in the help menu
 275     wxMenu *menuHelp = new wxMenu;
 276     menuHelp->Append(Keyboard_About, _T("&About...\tF1"), _T("Show about dialog"));
 277
 278     // now append the freshly created menu to the menu bar...
 279     wxMenuBar *menuBar = new wxMenuBar();
 280     menuBar->Append(menuFile, _T("&File"));
 281     menuBar->Append(menuKeys, _T("&Keys"));
 282     menuBar->Append(menuHelp, _T("&Help"));
 283
 284     // ... and attach this menu bar to the frame
 285     SetMenuBar(menuBar);
 286
 287     menuBar->Check(Keyboard_Skip, true);
 288
 289 #ifndef wxHAS_RAW_KEY_CODES
 290     menuBar->Enable(Keyboard_ShowRaw, false);
 291 #endif // !wxHAS_RAW_KEY_CODES
 292 #endif // wxUSE_MENUS
 293
 294     m_winText = new TextWindow(this);
 295     m_lboxLog = new wxListBox(this, wxID_ANY);
 296
 297     m_logTarget = new LboxLogger(m_lboxLog, wxLog::GetActiveTarget());
 298     wxLog::SetActiveTarget(m_logTarget);
 299
 300 #if wxUSE_STATUSBAR
 301     // create a status bar just for fun (by default with 1 pane only)
 302     CreateStatusBar(2);
 303     SetStatusText(_T("Welcome to wxWidgets!"));
 304 #endif // wxUSE_STATUSBAR
 305 }
 306
 307 // event handlers
 308
 309 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 310 {
 311     // true is to force the frame to close
 312     Close(true);
 313 }
 314
 315 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 316 {
 317     wxString msg = _T("Demonstrates keyboard event processing in wxWidgets\n")
 318                    _T("© 2002 Vadim Zeitlin");
 319
 320     wxMessageBox(msg, _T("About wxKeyboard"), wxOK | wxICON_INFORMATION, this);
 321 }
 322
 323 void MyFrame::OnClear(wxCommandEvent& WXUNUSED(event))
 324 {
 325     m_lboxLog->Clear();
 326 }
 327
 328 void MyFrame::OnSkip(wxCommandEvent& event)
 329 {
 330     m_winText->SetSkip(event.IsChecked());
 331 }
 332
 333 void MyFrame::OnShowRaw(wxCommandEvent& event)
 334 {
 335     m_winText->SetShowRaw(event.IsChecked());
 336 }
 337
 338 void MyFrame::OnSize(wxSizeEvent& WXUNUSED(event))
 339 {
 340     if ( m_winText )
 341     {
 342         wxSize size = GetClientSize();
 343         m_winText->SetSize(0, 0, size.x, 50);
 344         m_lboxLog->SetSize(0, 51, size.x, size.y - 50);
 345     }
 346 }
 347
 348 // ----------------------------------------------------------------------------
 349 // TextWindow
 350 // ----------------------------------------------------------------------------
 351
 352 void TextWindow::LogEvent(const wxChar *name, wxKeyEvent& event)
 353 {
 354     wxString key;
 355     long keycode = event.GetKeyCode();
 356     switch ( keycode )
 357     {
 358         case WXK_BACK: key = _T("BACK"); break;
 359         case WXK_TAB: key = _T("TAB"); break;
 360         case WXK_RETURN: key = _T("RETURN"); break;
 361         case WXK_ESCAPE: key = _T("ESCAPE"); break;
 362         case WXK_SPACE: key = _T("SPACE"); break;
 363         case WXK_DELETE: key = _T("DELETE"); break;
 364         case WXK_START: key = _T("START"); break;
 365         case WXK_LBUTTON: key = _T("LBUTTON"); break;
 366         case WXK_RBUTTON: key = _T("RBUTTON"); break;
 367         case WXK_CANCEL: key = _T("CANCEL"); break;
 368         case WXK_MBUTTON: key = _T("MBUTTON"); break;
 369         case WXK_CLEAR: key = _T("CLEAR"); break;
 370         case WXK_SHIFT: key = _T("SHIFT"); break;
 371         case WXK_ALT: key = _T("ALT"); break;
 372         case WXK_CONTROL: key = _T("CONTROL"); break;
 373         case WXK_MENU: key = _T("MENU"); break;
 374         case WXK_PAUSE: key = _T("PAUSE"); break;
 375         case WXK_CAPITAL: key = _T("CAPITAL"); break;
 376         case WXK_PRIOR: key = _T("PRIOR"); break;
 377         case WXK_NEXT: key = _T("NEXT"); break;
 378         case WXK_END: key = _T("END"); break;
 379         case WXK_HOME: key = _T("HOME"); break;
 380         case WXK_LEFT: key = _T("LEFT"); break;
 381         case WXK_UP: key = _T("UP"); break;
 382         case WXK_RIGHT: key = _T("RIGHT"); break;
 383         case WXK_DOWN: key = _T("DOWN"); break;
 384         case WXK_SELECT: key = _T("SELECT"); break;
 385         case WXK_PRINT: key = _T("PRINT"); break;
 386         case WXK_EXECUTE: key = _T("EXECUTE"); break;
 387         case WXK_SNAPSHOT: key = _T("SNAPSHOT"); break;
 388         case WXK_INSERT: key = _T("INSERT"); break;
 389         case WXK_HELP: key = _T("HELP"); break;
 390         case WXK_NUMPAD0: key = _T("NUMPAD0"); break;
 391         case WXK_NUMPAD1: key = _T("NUMPAD1"); break;
 392         case WXK_NUMPAD2: key = _T("NUMPAD2"); break;
 393         case WXK_NUMPAD3: key = _T("NUMPAD3"); break;
 394         case WXK_NUMPAD4: key = _T("NUMPAD4"); break;
 395         case WXK_NUMPAD5: key = _T("NUMPAD5"); break;
 396         case WXK_NUMPAD6: key = _T("NUMPAD6"); break;
 397         case WXK_NUMPAD7: key = _T("NUMPAD7"); break;
 398         case WXK_NUMPAD8: key = _T("NUMPAD8"); break;
 399         case WXK_NUMPAD9: key = _T("NUMPAD9"); break;
 400         case WXK_MULTIPLY: key = _T("MULTIPLY"); break;
 401         case WXK_ADD: key = _T("ADD"); break;
 402         case WXK_SEPARATOR: key = _T("SEPARATOR"); break;
 403         case WXK_SUBTRACT: key = _T("SUBTRACT"); break;
 404         case WXK_DECIMAL: key = _T("DECIMAL"); break;
 405         case WXK_DIVIDE: key = _T("DIVIDE"); break;
 406         case WXK_F1: key = _T("F1"); break;
 407         case WXK_F2: key = _T("F2"); break;
 408         case WXK_F3: key = _T("F3"); break;
 409         case WXK_F4: key = _T("F4"); break;
 410         case WXK_F5: key = _T("F5"); break;
 411         case WXK_F6: key = _T("F6"); break;
 412         case WXK_F7: key = _T("F7"); break;
 413         case WXK_F8: key = _T("F8"); break;
 414         case WXK_F9: key = _T("F9"); break;
 415         case WXK_F10: key = _T("F10"); break;
 416         case WXK_F11: key = _T("F11"); break;
 417         case WXK_F12: key = _T("F12"); break;
 418         case WXK_F13: key = _T("F13"); break;
 419         case WXK_F14: key = _T("F14"); break;
 420         case WXK_F15: key = _T("F15"); break;
 421         case WXK_F16: key = _T("F16"); break;
 422         case WXK_F17: key = _T("F17"); break;
 423         case WXK_F18: key = _T("F18"); break;
 424         case WXK_F19: key = _T("F19"); break;
 425         case WXK_F20: key = _T("F20"); break;
 426         case WXK_F21: key = _T("F21"); break;
 427         case WXK_F22: key = _T("F22"); break;
 428         case WXK_F23: key = _T("F23"); break;
 429         case WXK_F24: key = _T("F24"); break;
 430         case WXK_NUMLOCK: key = _T("NUMLOCK"); break;
 431         case WXK_SCROLL: key = _T("SCROLL"); break;
 432         case WXK_PAGEUP: key = _T("PAGEUP"); break;
 433         case WXK_PAGEDOWN: key = _T("PAGEDOWN"); break;
 434         case WXK_NUMPAD_SPACE: key = _T("NUMPAD_SPACE"); break;
 435         case WXK_NUMPAD_TAB: key = _T("NUMPAD_TAB"); break;
 436         case WXK_NUMPAD_ENTER: key = _T("NUMPAD_ENTER"); break;
 437         case WXK_NUMPAD_F1: key = _T("NUMPAD_F1"); break;
 438         case WXK_NUMPAD_F2: key = _T("NUMPAD_F2"); break;
 439         case WXK_NUMPAD_F3: key = _T("NUMPAD_F3"); break;
 440         case WXK_NUMPAD_F4: key = _T("NUMPAD_F4"); break;
 441         case WXK_NUMPAD_HOME: key = _T("NUMPAD_HOME"); break;
 442         case WXK_NUMPAD_LEFT: key = _T("NUMPAD_LEFT"); break;
 443         case WXK_NUMPAD_UP: key = _T("NUMPAD_UP"); break;
 444         case WXK_NUMPAD_RIGHT: key = _T("NUMPAD_RIGHT"); break;
 445         case WXK_NUMPAD_DOWN: key = _T("NUMPAD_DOWN"); break;
 446         case WXK_NUMPAD_PRIOR: key = _T("NUMPAD_PRIOR"); break;
 447         case WXK_NUMPAD_PAGEUP: key = _T("NUMPAD_PAGEUP"); break;
 448         case WXK_NUMPAD_PAGEDOWN: key = _T("NUMPAD_PAGEDOWN"); break;
 449         case WXK_NUMPAD_END: key = _T("NUMPAD_END"); break;
 450         case WXK_NUMPAD_BEGIN: key = _T("NUMPAD_BEGIN"); break;
 451         case WXK_NUMPAD_INSERT: key = _T("NUMPAD_INSERT"); break;
 452         case WXK_NUMPAD_DELETE: key = _T("NUMPAD_DELETE"); break;
 453         case WXK_NUMPAD_EQUAL: key = _T("NUMPAD_EQUAL"); break;
 454         case WXK_NUMPAD_MULTIPLY: key = _T("NUMPAD_MULTIPLY"); break;
 455         case WXK_NUMPAD_ADD: key = _T("NUMPAD_ADD"); break;
 456         case WXK_NUMPAD_SEPARATOR: key = _T("NUMPAD_SEPARATOR"); break;
 457         case WXK_NUMPAD_SUBTRACT: key = _T("NUMPAD_SUBTRACT"); break;
 458         case WXK_NUMPAD_DECIMAL: key = _T("NUMPAD_DECIMAL"); break;
 459         case WXK_NUMPAD_DIVIDE: key = _T("NUMPAD_DIVIDE"); break;
 460
 461         default:
 462         {
 463             if ( keycode < 256 )
 464             {
 465                 if ( keycode == 0 )
 466                     key.Printf(_T("NUL"));
 467                 else if ( keycode < 27 )
 468                     key.Printf(_T("Ctrl-%c"),
 469                                 (unsigned char)(_T('A') + keycode - 1));
 470                 else
 471                     key.Printf(_T("'%c'"), (unsigned char)keycode);
 472             }
 473             else
 474             {
 475                 key.Printf(_T("unknown (%ld)"), keycode);
 476             }
 477         }
 478     }
 479
 480     wxString msg;
 481     msg.Printf(_T("%s event: %s (flags = %c%c%c%c)"),
 482                name,
 483                key.c_str(),
 484                GetChar(event.ControlDown(), _T('C')),
 485                GetChar(event.AltDown(), _T('A')),
 486                GetChar(event.ShiftDown(), _T('S')),
 487                GetChar(event.MetaDown(), _T('M')));
 488
 489     if ( m_showRaw )
 490     {
 491         msg += wxString::Format(_T(" (raw key code/flags: %lu and 0x%lx)"),
 492                                 (unsigned long)event.GetRawKeyCode(),
 493                                 (unsigned long)event.GetRawKeyFlags());
 494     }
 495
 496     wxLogMessage(msg);
 497
 498     if ( m_skip )
 499     {
 500         event.Skip();
 501     }
 502 }