samples/display/display.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        display.cpp
   3 // Purpose:     wxWidgets sample showing the features of wxDisplay class
   4 // Author:      Vadim Zeitlin
   5 // Modified by: Ryan Norton & Brian Victor
   6 // Created:     23.02.03
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Vadim Zeitlin <vadim@wxwidgets.org>
   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 explicitly
  28 #ifndef WX_PRECOMP
  29     #include "wx/wx.h"
  30 #endif
  31
  32 #if !wxUSE_DISPLAY
  33     #error "To compile this sample you must build the library with wxUSE_DISPLAY set to 1"
  34 #endif
  35
  36 #include "wx/notebook.h"
  37
  38 #include "wx/display.h"
  39
  40
  41 // the application icon (under Windows and OS/2 it is in resources)
  42 #if defined(__WXGTK__) || defined(__WXMOTIF__) || defined(__WXMAC__) || defined(__WXMGL__) || defined(__WXX11__)
  43     #include "../sample.xpm"
  44 #endif
  45
  46 // ----------------------------------------------------------------------------
  47 // private classes
  48 // ----------------------------------------------------------------------------
  49
  50 // Define a new application type, each program should derive a class from wxApp
  51 class MyApp : public wxApp
  52 {
  53 public:
  54     // override base class virtuals
  55     // ----------------------------
  56
  57     // this one is called on application startup and is a good place for the app
  58     // initialization (doing it here and not in the ctor allows to have an error
  59     // return: if OnInit() returns false, the application terminates)
  60     virtual bool OnInit();
  61 };
  62
  63 // Define a new frame type: this is going to be our main frame
  64 class MyFrame : public wxFrame
  65 {
  66 public:
  67     // ctor(s)
  68     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size,
  69             long style = wxDEFAULT_FRAME_STYLE);
  70
  71     // event handlers (these functions should _not_ be virtual)
  72     void OnQuit(wxCommandEvent& event);
  73     void OnFromPoint(wxCommandEvent& event);
  74     void OnFullScreen(wxCommandEvent& event);
  75     void OnAbout(wxCommandEvent& event);
  76
  77     void OnChangeMode(wxCommandEvent& event);
  78     void OnResetMode(wxCommandEvent& event);
  79
  80     void OnLeftClick(wxMouseEvent& event);
  81
  82     void OnDisplayChanged(wxDisplayChangedEvent& event);
  83
  84 private:
  85     // convert video mode to textual description
  86     wxString VideoModeToText(const wxVideoMode& mode);
  87
  88     // GUI controls
  89     wxNotebook *m_notebook;
  90
  91     // any class wishing to process wxWidgets events must use this macro
  92     DECLARE_EVENT_TABLE()
  93 };
  94
  95 // Client data class for the choice control containing the video modes
  96 class MyVideoModeClientData : public wxClientData
  97 {
  98 public:
  99     MyVideoModeClientData(const wxVideoMode& m) : mode(m) { }
 100
 101     const wxVideoMode mode;
 102 };
 103
 104 // ----------------------------------------------------------------------------
 105 // constants
 106 // ----------------------------------------------------------------------------
 107
 108 // IDs for the controls and the menu commands
 109 enum
 110 {
 111     // menu items
 112     Display_Quit = 1,
 113
 114     Display_FromPoint,
 115     Display_FullScreen,
 116
 117     // controls
 118     Display_ChangeMode = 1000,
 119     Display_ResetMode,
 120     Display_CurrentMode,
 121
 122
 123     // it is important for the id corresponding to the "About" command to have
 124     // this standard value as otherwise it won't be handled properly under Mac
 125     // (where it is special and put into the "Apple" menu)
 126     Display_About = wxID_ABOUT
 127 };
 128
 129 // ----------------------------------------------------------------------------
 130 // event tables and other macros for wxWidgets
 131 // ----------------------------------------------------------------------------
 132
 133 // the event tables connect the wxWidgets events with the functions (event
 134 // handlers) which process them. It can be also done at run-time, but for the
 135 // simple menu events like this the static method is much simpler.
 136 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 137     EVT_MENU(Display_Quit,  MyFrame::OnQuit)
 138     EVT_MENU(Display_FromPoint,  MyFrame::OnFromPoint)
 139     EVT_MENU(Display_FullScreen, MyFrame::OnFullScreen)
 140     EVT_MENU(Display_About, MyFrame::OnAbout)
 141
 142     EVT_CHOICE(Display_ChangeMode, MyFrame::OnChangeMode)
 143     EVT_BUTTON(Display_ResetMode, MyFrame::OnResetMode)
 144
 145     EVT_LEFT_UP(MyFrame::OnLeftClick)
 146
 147
 148     EVT_DISPLAY_CHANGED(MyFrame::OnDisplayChanged)
 149 END_EVENT_TABLE()
 150
 151 // Create a new application object: this macro will allow wxWidgets 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 #ifdef __WXMSW__
 170     if ( argc == 2 && !wxStricmp(argv[1],  _T("/dx")) )
 171     {
 172         wxDisplay::UseDirectX(true);
 173     }
 174 #endif // __WXMSW__
 175
 176     // create the main application window
 177     MyFrame *frame = new MyFrame(_("Display wxWidgets Sample"),
 178                                  wxDefaultPosition, wxDefaultSize);
 179
 180     // and show it (the frames, unlike simple controls, are not shown when
 181     // created initially)
 182     frame->Show();
 183
 184     // success: wxApp::OnRun() will be called which will enter the main message
 185     // loop and the application will run. If we returned false here, the
 186     // application would exit immediately.
 187     return true;
 188 }
 189
 190 // ----------------------------------------------------------------------------
 191 // main frame
 192 // ----------------------------------------------------------------------------
 193
 194 // frame constructor
 195 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size, long style)
 196        : wxFrame(NULL, wxID_ANY, title, pos, size, style)
 197 {
 198     // set the frame icon
 199     SetIcon(wxICON(sample));
 200
 201 #if wxUSE_MENUS
 202     // create a menu bar
 203     wxMenu *menuDisplay = new wxMenu;
 204     menuDisplay->Append(Display_FromPoint, _("Find from &point..."));
 205     menuDisplay->AppendSeparator();
 206     menuDisplay->AppendCheckItem(Display_FullScreen, _("Full &screen\tF12"));
 207     menuDisplay->AppendSeparator();
 208     menuDisplay->Append(Display_Quit, _("E&xit\tAlt-X"), _("Quit this program"));
 209
 210     // the "About" item should be in the help menu
 211     wxMenu *helpMenu = new wxMenu;
 212     helpMenu->Append(Display_About, _("&About...\tF1"), _("Show about dialog"));
 213
 214     // now append the freshly created menu to the menu bar...
 215     wxMenuBar *menuBar = new wxMenuBar();
 216     menuBar->Append(menuDisplay, _("&Display"));
 217     menuBar->Append(helpMenu, _("&Help"));
 218
 219     // ... and attach this menu bar to the frame
 220     SetMenuBar(menuBar);
 221 #endif // wxUSE_MENUS
 222
 223     // create status bar
 224     CreateStatusBar();
 225
 226     // create child controls
 227
 228     wxPanel *panel = new wxPanel(this, wxID_ANY);
 229
 230     m_notebook = new wxNotebook(panel, wxID_ANY);
 231     const size_t count = wxDisplay::GetCount();
 232     for ( size_t nDpy = 0; nDpy < count; nDpy++ )
 233     {
 234         wxDisplay display(nDpy);
 235
 236         wxWindow *page = new wxPanel(m_notebook, wxID_ANY);
 237
 238         // create 2 column flex grid sizer with growable 2nd column
 239         wxFlexGridSizer *sizer = new wxFlexGridSizer(2, 10, 20);
 240         sizer->AddGrowableCol(1);
 241
 242         const wxRect r(display.GetGeometry());
 243         sizer->Add(new wxStaticText(page, wxID_ANY, _T("Origin: ")));
 244         sizer->Add(new wxStaticText
 245                        (
 246                         page,
 247                         wxID_ANY,
 248                         wxString::Format(_T("(%d, %d)"),
 249                                          r.x, r.y)
 250                        ));
 251
 252         sizer->Add(new wxStaticText(page, wxID_ANY, _T("Size: ")));
 253         sizer->Add(new wxStaticText
 254                        (
 255                         page,
 256                         wxID_ANY,
 257                         wxString::Format(_T("(%d, %d)"),
 258                                          r.width, r.height)
 259                        ));
 260
 261
 262         sizer->Add(new wxStaticText(page, wxID_ANY, _T("Name: ")));
 263         sizer->Add(new wxStaticText(page, wxID_ANY, display.GetName()));
 264
 265         wxChoice *choiceModes = new wxChoice(page, Display_ChangeMode);
 266         const wxArrayVideoModes modes = display.GetModes();
 267         const size_t count = modes.GetCount();
 268         for ( size_t nMode = 0; nMode < count; nMode++ )
 269         {
 270             const wxVideoMode& mode = modes[nMode];
 271
 272             choiceModes->Append(VideoModeToText(mode),
 273                                 new MyVideoModeClientData(mode));
 274         }
 275
 276         sizer->Add(new wxStaticText(page, wxID_ANY, _T("&Modes: ")));
 277         sizer->Add(choiceModes, 0, wxEXPAND);
 278
 279         sizer->Add(new wxStaticText(page, wxID_ANY, _T("Current: ")));
 280         sizer->Add(new wxStaticText(page, Display_CurrentMode,
 281                                     VideoModeToText(display.GetCurrentMode())));
 282
 283         // add it to another sizer to have borders around it and button below
 284         wxSizer *sizerTop = new wxBoxSizer(wxVERTICAL);
 285         sizerTop->Add(sizer, 1, wxALL | wxEXPAND, 10);
 286
 287         sizerTop->Add(new wxButton(page, Display_ResetMode, _T("&Reset mode")),
 288                       0, wxALL | wxCENTRE, 5);
 289         page->SetSizer(sizerTop);
 290
 291         m_notebook->AddPage(page,
 292                             wxString::Format(_T("Display %lu"),
 293                                              (unsigned long)nDpy));
 294     }
 295
 296     wxBoxSizer *sizer = new wxBoxSizer(wxHORIZONTAL);
 297     sizer->Add(m_notebook, 1, wxEXPAND);
 298     panel->SetSizer(sizer);
 299     sizer->Fit(this);
 300     sizer->SetSizeHints(this);
 301 }
 302
 303 wxString MyFrame::VideoModeToText(const wxVideoMode& mode)
 304 {
 305     wxString s;
 306     s.Printf(_T("%dx%d"), mode.w, mode.h);
 307
 308     if ( mode.bpp )
 309     {
 310         s += wxString::Format(_T(", %dbpp"), mode.bpp);
 311     }
 312
 313     if ( mode.refresh )
 314     {
 315         s += wxString::Format(_T(", %dHz"), mode.refresh);
 316     }
 317
 318     return s;
 319 }
 320
 321 // event handlers
 322
 323 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 324 {
 325     // true is to force the frame to close
 326     Close(true);
 327 }
 328
 329 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 330 {
 331     wxMessageBox(_T("Demo program for wxDisplay class.\n\n(c) 2003 Vadim Zeitlin"),
 332                  _T("About Display Sample"),
 333                  wxOK | wxICON_INFORMATION,
 334                  this);
 335 }
 336
 337 void MyFrame::OnFromPoint(wxCommandEvent& WXUNUSED(event))
 338 {
 339     SetStatusText(_T("Press the mouse anywhere..."));
 340
 341     CaptureMouse();
 342 }
 343
 344 void MyFrame::OnFullScreen(wxCommandEvent& event)
 345 {
 346     ShowFullScreen(event.IsChecked());
 347 }
 348
 349 void MyFrame::OnChangeMode(wxCommandEvent& event)
 350 {
 351     wxDisplay dpy(m_notebook->GetSelection());
 352
 353     // you wouldn't write this in real code, would you?
 354     if ( !dpy.ChangeMode(((MyVideoModeClientData *)
 355                 wxDynamicCast(event.GetEventObject(), wxChoice)->
 356                     GetClientObject(event.GetInt()))->mode) )
 357     {
 358         wxLogError(_T("Changing video mode failed!"));
 359     }
 360 }
 361
 362 void MyFrame::OnResetMode(wxCommandEvent& WXUNUSED(event))
 363 {
 364     wxDisplay dpy(m_notebook->GetSelection());
 365
 366     dpy.ResetMode();
 367 }
 368
 369 void MyFrame::OnLeftClick(wxMouseEvent& event)
 370 {
 371     if ( HasCapture() )
 372     {
 373         // mouse events are in client coords, wxDisplay works in screen ones
 374         const wxPoint ptScreen = ClientToScreen(event.GetPosition());
 375         int dpy = wxDisplay::GetFromPoint(ptScreen);
 376         if ( dpy == wxNOT_FOUND )
 377         {
 378             wxLogError(_T("Mouse clicked outside of display!?"));
 379         }
 380
 381         wxLogStatus(this, _T("Mouse clicked in display %d (at (%d, %d))"),
 382                     dpy, ptScreen.x, ptScreen.y);
 383
 384         ReleaseMouse();
 385     }
 386 }
 387
 388 void MyFrame::OnDisplayChanged(wxDisplayChangedEvent& event)
 389 {
 390     // update the current mode text
 391     for ( size_t n = 0; n < m_notebook->GetPageCount(); n++ )
 392     {
 393         wxStaticText *label = wxDynamicCast(m_notebook->GetPage(n)->
 394                                                 FindWindow(Display_CurrentMode),
 395                                             wxStaticText);
 396         if ( label )
 397             label->SetLabel(VideoModeToText(wxDisplay(n).GetCurrentMode()));
 398     }
 399
 400
 401     wxLogStatus(this, _T("Display resolution was changed."));
 402
 403     event.Skip();
 404 }
 405