samples/display/display.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        display.cpp
   3 // Purpose:     wxWindows 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@wxwindows.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".from here
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if !wxUSE_DISPLAY
  28     #error "To compile this sample you must build the library with wxUSE_DISPLAY set to 1"
  29 #endif
  30
  31 // for all others, include the necessary headers explicitly
  32 #ifndef WX_PRECOMP
  33     #include "wx/app.h"
  34     #include "wx/stattext.h"
  35
  36     #include "wx/layout.h"
  37     #include "wx/intl.h"
  38     #include "wx/menu.h"
  39     #include "wx/sizer.h"
  40     #include "wx/choice.h"
  41     #include "wx/msgdlg.h"
  42     #include "wx/log.h"
  43     #include "wx/panel.h"
  44     #include "wx/button.h"
  45 #endif
  46
  47 #include "wx/notebook.h"
  48
  49 #include "wx/display.h"
  50
  51 // the application icon (under Windows and OS/2 it is in resources)
  52 #if defined(__WXGTK__) || defined(__WXMOTIF__) || defined(__WXMAC__) || defined(__WXMGL__) || defined(__WXX11__)
  53     #include "../sample.xpm"
  54 #endif
  55
  56 // ----------------------------------------------------------------------------
  57 // private classes
  58 // ----------------------------------------------------------------------------
  59
  60 // Define a new application type, each program should derive a class from wxApp
  61 class MyApp : public wxApp
  62 {
  63 public:
  64     // override base class virtuals
  65     // ----------------------------
  66
  67     // this one is called on application startup and is a good place for the app
  68     // initialization (doing it here and not in the ctor allows to have an error
  69     // return: if OnInit() returns false, the application terminates)
  70     virtual bool OnInit();
  71 };
  72
  73 // Define a new frame type: this is going to be our main frame
  74 class MyFrame : public wxFrame
  75 {
  76 public:
  77     // ctor(s)
  78     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size,
  79             long style = wxDEFAULT_FRAME_STYLE);
  80
  81     // event handlers (these functions should _not_ be virtual)
  82     void OnQuit(wxCommandEvent& event);
  83     void OnFromPoint(wxCommandEvent& event);
  84     void OnFullScreen(wxCommandEvent& event);
  85     void OnAbout(wxCommandEvent& event);
  86
  87     void OnChangeMode(wxCommandEvent& event);
  88     void OnResetMode(wxCommandEvent& event);
  89
  90     void OnLeftClick(wxMouseEvent& event);
  91
  92     void OnDisplayChanged(wxDisplayChangedEvent& event);
  93
  94 private:
  95     // convert video mode to textual description
  96     wxString VideoModeToText(const wxVideoMode& mode);
  97
  98     // GUI controls
  99     wxNotebook *m_notebook;
 100
 101     // any class wishing to process wxWindows events must use this macro
 102     DECLARE_EVENT_TABLE()
 103 };
 104
 105 // Client data class for the choice control containing the video modes
 106 class MyVideoModeClientData : public wxClientData
 107 {
 108 public:
 109     MyVideoModeClientData(const wxVideoMode& m) : mode(m) { }
 110
 111     const wxVideoMode mode;
 112 };
 113
 114 // ----------------------------------------------------------------------------
 115 // constants
 116 // ----------------------------------------------------------------------------
 117
 118 // IDs for the controls and the menu commands
 119 enum
 120 {
 121     // menu items
 122     Display_Quit = 1,
 123
 124     Display_FromPoint,
 125     Display_FullScreen,
 126
 127     // controls
 128     Display_ChangeMode = 1000,
 129     Display_ResetMode,
 130     Display_CurrentMode,
 131
 132
 133     // it is important for the id corresponding to the "About" command to have
 134     // this standard value as otherwise it won't be handled properly under Mac
 135     // (where it is special and put into the "Apple" menu)
 136     Display_About = wxID_ABOUT
 137 };
 138
 139 // ----------------------------------------------------------------------------
 140 // event tables and other macros for wxWindows
 141 // ----------------------------------------------------------------------------
 142
 143 // the event tables connect the wxWindows events with the functions (event
 144 // handlers) which process them. It can be also done at run-time, but for the
 145 // simple menu events like this the static method is much simpler.
 146 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 147     EVT_MENU(Display_Quit,  MyFrame::OnQuit)
 148     EVT_MENU(Display_FromPoint,  MyFrame::OnFromPoint)
 149     EVT_MENU(Display_FullScreen, MyFrame::OnFullScreen)
 150     EVT_MENU(Display_About, MyFrame::OnAbout)
 151
 152     EVT_CHOICE(Display_ChangeMode, MyFrame::OnChangeMode)
 153     EVT_BUTTON(Display_ResetMode, MyFrame::OnResetMode)
 154
 155     EVT_LEFT_UP(MyFrame::OnLeftClick)
 156
 157
 158     EVT_DISPLAY_CHANGED(MyFrame::OnDisplayChanged)
 159 END_EVENT_TABLE()
 160
 161 // Create a new application object: this macro will allow wxWindows to create
 162 // the application object during program execution (it's better than using a
 163 // static object for many reasons) and also declares the accessor function
 164 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 165 // not wxApp)
 166 IMPLEMENT_APP(MyApp)
 167
 168 // ============================================================================
 169 // implementation
 170 // ============================================================================
 171
 172 // ----------------------------------------------------------------------------
 173 // the application class
 174 // ----------------------------------------------------------------------------
 175
 176 // 'Main program' equivalent: the program execution "starts" here
 177 bool MyApp::OnInit()
 178 {
 179 #ifdef __WXMSW__
 180     if ( argc == 2 && !wxStricmp(argv[1],  _T("/dx")) )
 181     {
 182         wxDisplay::UseDirectX(true);
 183     }
 184 #endif // __WXMSW__
 185
 186     // create the main application window
 187     MyFrame *frame = new MyFrame(_("Display wxWindows Sample"),
 188                                  wxPoint(50, 50), wxSize(450, 340));
 189
 190     // and show it (the frames, unlike simple controls, are not shown when
 191     // created initially)
 192     frame->Show();
 193
 194     // success: wxApp::OnRun() will be called which will enter the main message
 195     // loop and the application will run. If we returned FALSE here, the
 196     // application would exit immediately.
 197     return TRUE;
 198 }
 199
 200 // ----------------------------------------------------------------------------
 201 // main frame
 202 // ----------------------------------------------------------------------------
 203
 204 // frame constructor
 205 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size, long style)
 206        : wxFrame(NULL, -1, title, pos, size, style)
 207 {
 208     // set the frame icon
 209     SetIcon(wxICON(sample));
 210
 211 #if wxUSE_MENUS
 212     // create a menu bar
 213     wxMenu *menuDisplay = new wxMenu;
 214     menuDisplay->Append(Display_FromPoint, _("Find from &point..."));
 215     menuDisplay->AppendSeparator();
 216     menuDisplay->AppendCheckItem(Display_FullScreen, _("Full &screen\tF12"));
 217     menuDisplay->AppendSeparator();
 218     menuDisplay->Append(Display_Quit, _("E&xit\tAlt-X"), _("Quit this program"));
 219
 220     // the "About" item should be in the help menu
 221     wxMenu *helpMenu = new wxMenu;
 222     helpMenu->Append(Display_About, _("&About...\tF1"), _("Show about dialog"));
 223
 224     // now append the freshly created menu to the menu bar...
 225     wxMenuBar *menuBar = new wxMenuBar();
 226     menuBar->Append(menuDisplay, _("&Display"));
 227     menuBar->Append(helpMenu, _("&Help"));
 228
 229     // ... and attach this menu bar to the frame
 230     SetMenuBar(menuBar);
 231 #endif // wxUSE_MENUS
 232
 233     // create status bar
 234     CreateStatusBar();
 235
 236     // create child controls
 237     m_notebook = new wxNotebook(this, -1);
 238     const size_t count = wxDisplay::GetCount();
 239     for ( size_t nDpy = 0; nDpy < count; nDpy++ )
 240     {
 241         wxDisplay display(nDpy);
 242
 243         wxWindow *page = new wxPanel(m_notebook, -1);
 244
 245         // create 2 column flex grid sizer with growable 2nd column
 246         wxFlexGridSizer *sizer = new wxFlexGridSizer(2, 10, 20);
 247         sizer->AddGrowableCol(1);
 248
 249         const wxRect r(display.GetGeometry());
 250         sizer->Add(new wxStaticText(page, -1, _T("Origin: ")));
 251         sizer->Add(new wxStaticText
 252                        (
 253                         page,
 254                         -1,
 255                         wxString::Format(_T("(%d, %d)"),
 256                                          r.x, r.y)
 257                        ));
 258
 259         sizer->Add(new wxStaticText(page, -1, _T("Size: ")));
 260         sizer->Add(new wxStaticText
 261                        (
 262                         page,
 263                         -1,
 264                         wxString::Format(_T("(%d, %d)"),
 265                                          r.width, r.height)
 266                        ));
 267
 268
 269         sizer->Add(new wxStaticText(page, -1, _T("Name: ")));
 270         sizer->Add(new wxStaticText(page, -1, display.GetName()));
 271
 272         wxChoice *choiceModes = new wxChoice(page, Display_ChangeMode);
 273         const wxArrayVideoModes modes = display.GetModes();
 274         const size_t count = modes.GetCount();
 275         for ( size_t nMode = 0; nMode < count; nMode++ )
 276         {
 277             const wxVideoMode& mode = modes[nMode];
 278
 279             choiceModes->Append(VideoModeToText(mode),
 280                                 new MyVideoModeClientData(mode));
 281         }
 282
 283         sizer->Add(new wxStaticText(page, -1, _T("&Modes: ")));
 284         sizer->Add(choiceModes, 0, wxEXPAND);
 285
 286         sizer->Add(new wxStaticText(page, -1, _T("Current: ")));
 287         sizer->Add(new wxStaticText(page, Display_CurrentMode,
 288                                     VideoModeToText(display.GetCurrentMode())));
 289
 290         // add it to another sizer to have borders around it and button below
 291         wxSizer *sizerTop = new wxBoxSizer(wxVERTICAL);
 292         sizerTop->Add(sizer, 1, wxALL | wxEXPAND, 10);
 293         sizerTop->Add(new wxButton(page, Display_ResetMode, _T("&Reset mode")),
 294                       0, wxALL | wxCENTRE, 5);
 295         page->SetSizer(sizerTop);
 296
 297         m_notebook->AddPage(page,
 298                             wxString::Format(_T("Display %lu"),
 299                                              (unsigned long)nDpy));
 300     }
 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 ( int 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