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/bookctrl.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     wxBookCtrl *m_book;
  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_FromPoint = wxID_HIGHEST + 1,
 113     Display_FullScreen,
 114
 115     // controls
 116     Display_ChangeMode,
 117     Display_ResetMode,
 118     Display_CurrentMode,
 119
 120
 121     // it is important for the id corresponding to the "About" command to have
 122     // this standard value as otherwise it won't be handled properly under Mac
 123     // (where it is special and put into the "Apple" menu)
 124     Display_Quit = wxID_EXIT,
 125     Display_About = wxID_ABOUT
 126 };
 127
 128 // ----------------------------------------------------------------------------
 129 // event tables and other macros for wxWidgets
 130 // ----------------------------------------------------------------------------
 131
 132 // the event tables connect the wxWidgets events with the functions (event
 133 // handlers) which process them. It can be also done at run-time, but for the
 134 // simple menu events like this the static method is much simpler.
 135 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 136     EVT_MENU(Display_Quit,  MyFrame::OnQuit)
 137     EVT_MENU(Display_FromPoint,  MyFrame::OnFromPoint)
 138     EVT_MENU(Display_FullScreen, MyFrame::OnFullScreen)
 139     EVT_MENU(Display_About, MyFrame::OnAbout)
 140
 141     EVT_CHOICE(Display_ChangeMode, MyFrame::OnChangeMode)
 142     EVT_BUTTON(Display_ResetMode, MyFrame::OnResetMode)
 143
 144     EVT_LEFT_UP(MyFrame::OnLeftClick)
 145
 146
 147     EVT_DISPLAY_CHANGED(MyFrame::OnDisplayChanged)
 148 END_EVENT_TABLE()
 149
 150 // Create a new application object: this macro will allow wxWidgets to create
 151 // the application object during program execution (it's better than using a
 152 // static object for many reasons) and also declares the accessor function
 153 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 154 // not wxApp)
 155 IMPLEMENT_APP(MyApp)
 156
 157 // ============================================================================
 158 // implementation
 159 // ============================================================================
 160
 161 // ----------------------------------------------------------------------------
 162 // the application class
 163 // ----------------------------------------------------------------------------
 164
 165 // 'Main program' equivalent: the program execution "starts" here
 166 bool MyApp::OnInit()
 167 {
 168 #ifdef __WXMSW__
 169     if ( argc == 2 && !wxStricmp(argv[1],  _T("/dx")) )
 170     {
 171         wxDisplay::UseDirectX(true);
 172     }
 173 #endif // __WXMSW__
 174
 175     // create the main application window
 176     MyFrame *frame = new MyFrame(_("Display wxWidgets Sample"),
 177                                  wxDefaultPosition, wxDefaultSize);
 178
 179     // and show it (the frames, unlike simple controls, are not shown when
 180     // created initially)
 181     frame->Show();
 182
 183     // success: wxApp::OnRun() will be called which will enter the main message
 184     // loop and the application will run. If we returned false here, the
 185     // application would exit immediately.
 186     return true;
 187 }
 188
 189 // ----------------------------------------------------------------------------
 190 // main frame
 191 // ----------------------------------------------------------------------------
 192
 193 // frame constructor
 194 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size, long style)
 195        : wxFrame(NULL, wxID_ANY, title, pos, size, style)
 196 {
 197     // set the frame icon
 198     SetIcon(wxICON(sample));
 199
 200 #if wxUSE_MENUS
 201     // create a menu bar
 202     wxMenu *menuDisplay = new wxMenu;
 203     menuDisplay->Append(Display_FromPoint, _("Find from &point..."));
 204     menuDisplay->AppendSeparator();
 205     menuDisplay->AppendCheckItem(Display_FullScreen, _("Full &screen\tF12"));
 206     menuDisplay->AppendSeparator();
 207     menuDisplay->Append(Display_Quit, _("E&xit\tAlt-X"), _("Quit this program"));
 208
 209     // the "About" item should be in the help menu
 210     wxMenu *helpMenu = new wxMenu;
 211     helpMenu->Append(Display_About, _("&About...\tF1"), _("Show about dialog"));
 212
 213     // now append the freshly created menu to the menu bar...
 214     wxMenuBar *menuBar = new wxMenuBar();
 215     menuBar->Append(menuDisplay, _("&Display"));
 216     menuBar->Append(helpMenu, _("&Help"));
 217
 218     // ... and attach this menu bar to the frame
 219     SetMenuBar(menuBar);
 220 #endif // wxUSE_MENUS
 221
 222 #if wxUSE_STATUSBAR
 223     // create status bar
 224     CreateStatusBar();
 225 #endif // wxUSE_STATUSBAR
 226
 227     // create child controls
 228
 229     wxPanel *panel = new wxPanel(this, wxID_ANY);
 230
 231     m_book = new wxBookCtrl(panel, wxID_ANY);
 232     const size_t count = wxDisplay::GetCount();
 233     for ( size_t nDpy = 0; nDpy < count; nDpy++ )
 234     {
 235         wxDisplay display(nDpy);
 236
 237         wxWindow *page = new wxPanel(m_book, wxID_ANY);
 238
 239         // create 2 column flex grid sizer with growable 2nd column
 240         wxFlexGridSizer *sizer = new wxFlexGridSizer(2, 10, 20);
 241         sizer->AddGrowableCol(1);
 242
 243         const wxRect r(display.GetGeometry());
 244         sizer->Add(new wxStaticText(page, wxID_ANY, _T("Origin: ")));
 245         sizer->Add(new wxStaticText
 246                        (
 247                         page,
 248                         wxID_ANY,
 249                         wxString::Format(_T("(%d, %d)"),
 250                                          r.x, r.y)
 251                        ));
 252
 253         sizer->Add(new wxStaticText(page, wxID_ANY, _T("Size: ")));
 254         sizer->Add(new wxStaticText
 255                        (
 256                         page,
 257                         wxID_ANY,
 258                         wxString::Format(_T("(%d, %d)"),
 259                                          r.width, r.height)
 260                        ));
 261
 262
 263         sizer->Add(new wxStaticText(page, wxID_ANY, _T("Name: ")));
 264         sizer->Add(new wxStaticText(page, wxID_ANY, display.GetName()));
 265
 266         wxChoice *choiceModes = new wxChoice(page, Display_ChangeMode);
 267         const wxArrayVideoModes modes = display.GetModes();
 268         const size_t count = modes.GetCount();
 269         for ( size_t nMode = 0; nMode < count; nMode++ )
 270         {
 271             const wxVideoMode& mode = modes[nMode];
 272
 273             choiceModes->Append(VideoModeToText(mode),
 274                                 new MyVideoModeClientData(mode));
 275         }
 276
 277         sizer->Add(new wxStaticText(page, wxID_ANY, _T("&Modes: ")));
 278         sizer->Add(choiceModes, 0, wxEXPAND);
 279
 280         sizer->Add(new wxStaticText(page, wxID_ANY, _T("Current: ")));
 281         sizer->Add(new wxStaticText(page, Display_CurrentMode,
 282                                     VideoModeToText(display.GetCurrentMode())));
 283
 284         // add it to another sizer to have borders around it and button below
 285         wxSizer *sizerTop = new wxBoxSizer(wxVERTICAL);
 286         sizerTop->Add(sizer, 1, wxALL | wxEXPAND, 10);
 287
 288         sizerTop->Add(new wxButton(page, Display_ResetMode, _T("&Reset mode")),
 289                       0, wxALL | wxCENTRE, 5);
 290         page->SetSizer(sizerTop);
 291
 292         m_book->AddPage(page,
 293                         wxString::Format(_T("Display %lu"),
 294                                          (unsigned long)nDpy));
 295     }
 296
 297     wxBoxSizer *sizer = new wxBoxSizer(wxHORIZONTAL);
 298     sizer->Add(m_book, 1, wxEXPAND);
 299     panel->SetSizer(sizer);
 300     sizer->Fit(this);
 301     sizer->SetSizeHints(this);
 302 }
 303
 304 wxString MyFrame::VideoModeToText(const wxVideoMode& mode)
 305 {
 306     wxString s;
 307     s.Printf(_T("%dx%d"), mode.w, mode.h);
 308
 309     if ( mode.bpp )
 310     {
 311         s += wxString::Format(_T(", %dbpp"), mode.bpp);
 312     }
 313
 314     if ( mode.refresh )
 315     {
 316         s += wxString::Format(_T(", %dHz"), mode.refresh);
 317     }
 318
 319     return s;
 320 }
 321
 322 // event handlers
 323
 324 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 325 {
 326     // true is to force the frame to close
 327     Close(true);
 328 }
 329
 330 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 331 {
 332     wxMessageBox(_T("Demo program for wxDisplay class.\n\n(c) 2003 Vadim Zeitlin"),
 333                  _T("About Display Sample"),
 334                  wxOK | wxICON_INFORMATION,
 335                  this);
 336 }
 337
 338 void MyFrame::OnFromPoint(wxCommandEvent& WXUNUSED(event))
 339 {
 340 #if wxUSE_STATUSBAR
 341     SetStatusText(_T("Press the mouse anywhere..."));
 342 #endif // wxUSE_STATUSBAR
 343
 344     CaptureMouse();
 345 }
 346
 347 void MyFrame::OnFullScreen(wxCommandEvent& event)
 348 {
 349     ShowFullScreen(event.IsChecked());
 350 }
 351
 352 void MyFrame::OnChangeMode(wxCommandEvent& event)
 353 {
 354     wxDisplay dpy(m_book->GetSelection());
 355
 356     // you wouldn't write this in real code, would you?
 357     if ( !dpy.ChangeMode(((MyVideoModeClientData *)
 358                 wxDynamicCast(event.GetEventObject(), wxChoice)->
 359                     GetClientObject(event.GetInt()))->mode) )
 360     {
 361         wxLogError(_T("Changing video mode failed!"));
 362     }
 363 }
 364
 365 void MyFrame::OnResetMode(wxCommandEvent& WXUNUSED(event))
 366 {
 367     wxDisplay dpy(m_book->GetSelection());
 368
 369     dpy.ResetMode();
 370 }
 371
 372 void MyFrame::OnLeftClick(wxMouseEvent& event)
 373 {
 374     if ( HasCapture() )
 375     {
 376         // mouse events are in client coords, wxDisplay works in screen ones
 377         const wxPoint ptScreen = ClientToScreen(event.GetPosition());
 378         int dpy = wxDisplay::GetFromPoint(ptScreen);
 379         if ( dpy == wxNOT_FOUND )
 380         {
 381             wxLogError(_T("Mouse clicked outside of display!?"));
 382         }
 383
 384         wxLogStatus(this, _T("Mouse clicked in display %d (at (%d, %d))"),
 385                     dpy, ptScreen.x, ptScreen.y);
 386
 387         ReleaseMouse();
 388     }
 389 }
 390
 391 void MyFrame::OnDisplayChanged(wxDisplayChangedEvent& event)
 392 {
 393     // update the current mode text
 394     for ( size_t n = 0; n < m_book->GetPageCount(); n++ )
 395     {
 396         wxStaticText *label = wxDynamicCast(m_book->GetPage(n)->
 397                                                 FindWindow(Display_CurrentMode),
 398                                             wxStaticText);
 399         if ( label )
 400             label->SetLabel(VideoModeToText(wxDisplay(n).GetCurrentMode()));
 401     }
 402
 403
 404     wxLogStatus(this, _T("Display resolution was changed."));
 405
 406     event.Skip();
 407 }