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:
   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/frame.h"
  35
  36     #include "wx/stattext.h"
  37
  38     #include "wx/layout.h"
  39 #endif
  40
  41 #include "wx/notebook.h"
  42
  43 #include "wx/display.h"
  44
  45 // ----------------------------------------------------------------------------
  46 // private classes
  47 // ----------------------------------------------------------------------------
  48
  49 // Define a new application type, each program should derive a class from wxApp
  50 class MyApp : public wxApp
  51 {
  52 public:
  53     // override base class virtuals
  54     // ----------------------------
  55
  56     // this one is called on application startup and is a good place for the app
  57     // initialization (doing it here and not in the ctor allows to have an error
  58     // return: if OnInit() returns false, the application terminates)
  59     virtual bool OnInit();
  60 };
  61
  62 // Define a new frame type: this is going to be our main frame
  63 class MyFrame : public wxFrame
  64 {
  65 public:
  66     // ctor(s)
  67     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size,
  68             long style = wxDEFAULT_FRAME_STYLE);
  69
  70     // event handlers (these functions should _not_ be virtual)
  71     void OnQuit(wxCommandEvent& event);
  72     void OnFromPoint(wxCommandEvent& event);
  73     void OnFullScreen(wxCommandEvent& event);
  74     void OnAbout(wxCommandEvent& event);
  75
  76     void OnChangeMode(wxCommandEvent& event);
  77     void OnResetMode(wxCommandEvent& event);
  78
  79     void OnLeftClick(wxMouseEvent& event);
  80
  81     void OnDisplayChanged(wxDisplayChangedEvent& event);
  82
  83 private:
  84     // convert video mode to textual description
  85     wxString VideoModeToText(const wxVideoMode& mode);
  86
  87     // GUI controls
  88     wxNotebook *m_notebook;
  89
  90     // any class wishing to process wxWindows events must use this macro
  91     DECLARE_EVENT_TABLE()
  92 };
  93
  94 // Client data class for the choice control containing the video modes
  95 class MyVideoModeClientData : public wxClientData
  96 {
  97 public:
  98     MyVideoModeClientData(const wxVideoMode& m) : mode(m) { }
  99
 100     const wxVideoMode mode;
 101 };
 102
 103 // ----------------------------------------------------------------------------
 104 // constants
 105 // ----------------------------------------------------------------------------
 106
 107 // IDs for the controls and the menu commands
 108 enum
 109 {
 110     // menu items
 111     Display_Quit = 1,
 112
 113     Display_FromPoint,
 114     Display_FullScreen,
 115
 116     // controls
 117     Display_ChangeMode = 1000,
 118     Display_ResetMode,
 119     Display_CurrentMode,
 120
 121
 122     // it is important for the id corresponding to the "About" command to have
 123     // this standard value as otherwise it won't be handled properly under Mac
 124     // (where it is special and put into the "Apple" menu)
 125     Display_About = wxID_ABOUT
 126 };
 127
 128 // ----------------------------------------------------------------------------
 129 // event tables and other macros for wxWindows
 130 // ----------------------------------------------------------------------------
 131
 132 // the event tables connect the wxWindows 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 wxWindows 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 wxWindows Sample"),
 177                                  wxPoint(50, 50), wxSize(450, 340));
 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, -1, title, pos, size, style)
 196 {
 197     // set the frame icon
 198     SetIcon(wxICON(mondrian));
 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     // create status bar
 223     CreateStatusBar();
 224
 225     // create child controls
 226     m_notebook = new wxNotebook(this, -1);
 227     const size_t count = wxDisplay::GetCount();
 228     for ( size_t nDpy = 0; nDpy < count; nDpy++ )
 229     {
 230         wxDisplay display(nDpy);
 231
 232         wxWindow *page = new wxPanel(m_notebook, -1);
 233
 234         // create 2 column flex grid sizer with growable 2nd column
 235         wxFlexGridSizer *sizer = new wxFlexGridSizer(2, 10, 20);
 236         sizer->AddGrowableCol(1);
 237
 238         const wxRect r(display.GetGeometry());
 239         sizer->Add(new wxStaticText(page, -1, _T("Origin: ")));
 240         sizer->Add(new wxStaticText
 241                        (
 242                         page,
 243                         -1,
 244                         wxString::Format(_T("(%d, %d)"),
 245                                          r.x, r.y)
 246                        ));
 247
 248         sizer->Add(new wxStaticText(page, -1, _T("Size: ")));
 249         sizer->Add(new wxStaticText
 250                        (
 251                         page,
 252                         -1,
 253                         wxString::Format(_T("(%d, %d)"),
 254                                          r.width, r.height)
 255                        ));
 256
 257
 258         sizer->Add(new wxStaticText(page, -1, _T("Name: ")));
 259         sizer->Add(new wxStaticText(page, -1, display.GetName()));
 260
 261         wxChoice *choiceModes = new wxChoice(page, Display_ChangeMode);
 262         const wxArrayVideoModes modes = display.GetModes();
 263         const size_t count = modes.GetCount();
 264         for ( size_t nMode = 0; nMode < count; nMode++ )
 265         {
 266             const wxVideoMode& mode = modes[nMode];
 267
 268             choiceModes->Append(VideoModeToText(mode),
 269                                 new MyVideoModeClientData(mode));
 270         }
 271
 272         sizer->Add(new wxStaticText(page, -1, _T("&Modes: ")));
 273         sizer->Add(choiceModes, 0, wxEXPAND);
 274
 275         sizer->Add(new wxStaticText(page, -1, _T("Current: ")));
 276         sizer->Add(new wxStaticText(page, Display_CurrentMode,
 277                                     VideoModeToText(display.GetCurrentMode())));
 278
 279         // add it to another sizer to have borders around it and button below
 280         wxSizer *sizerTop = new wxBoxSizer(wxVERTICAL);
 281         sizerTop->Add(sizer, 1, wxALL | wxEXPAND, 10);
 282         sizerTop->Add(new wxButton(page, Display_ResetMode, _T("&Reset mode")),
 283                       0, wxALL | wxCENTRE, 5);
 284         page->SetSizer(sizerTop);
 285
 286         m_notebook->AddPage(page,
 287                             wxString::Format(_T("Display %lu"),
 288                                              (unsigned long)nDpy));
 289     }
 290 }
 291
 292 wxString MyFrame::VideoModeToText(const wxVideoMode& mode)
 293 {
 294     wxString s;
 295     s.Printf(_T("%dx%d"), mode.w, mode.h);
 296
 297     if ( mode.bpp )
 298     {
 299         s += wxString::Format(_T(", %dbpp"), mode.bpp);
 300     }
 301
 302     if ( mode.refresh )
 303     {
 304         s += wxString::Format(_T(", %dHz"), mode.refresh);
 305     }
 306
 307     return s;
 308 }
 309
 310 // event handlers
 311
 312 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 313 {
 314     // TRUE is to force the frame to close
 315     Close(TRUE);
 316 }
 317
 318 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 319 {
 320     wxMessageBox(_T("Demo program for wxDisplay class.\n\n(c) 2003 Vadim Zeitlin"),
 321                  _T("About Display Sample"),
 322                  wxOK | wxICON_INFORMATION,
 323                  this);
 324 }
 325
 326 void MyFrame::OnFromPoint(wxCommandEvent& WXUNUSED(event))
 327 {
 328     SetStatusText(_T("Press the mouse anywhere..."));
 329
 330     CaptureMouse();
 331 }
 332
 333 void MyFrame::OnFullScreen(wxCommandEvent& event)
 334 {
 335     ShowFullScreen(event.IsChecked());
 336 }
 337
 338 void MyFrame::OnChangeMode(wxCommandEvent& event)
 339 {
 340     wxDisplay dpy(m_notebook->GetSelection());
 341
 342     // you wouldn't write this in real code, would you?
 343     if ( !dpy.ChangeMode(((MyVideoModeClientData *)
 344                 wxDynamicCast(event.GetEventObject(), wxChoice)->
 345                     GetClientObject(event.GetInt()))->mode) )
 346     {
 347         wxLogError(_T("Changing video mode failed!"));
 348     }
 349 }
 350
 351 void MyFrame::OnResetMode(wxCommandEvent& WXUNUSED(event))
 352 {
 353     wxDisplay dpy(m_notebook->GetSelection());
 354
 355     dpy.ResetMode();
 356 }
 357
 358 void MyFrame::OnLeftClick(wxMouseEvent& event)
 359 {
 360     if ( HasCapture() )
 361     {
 362         // mouse events are in client coords, wxDisplay works in screen ones
 363         const wxPoint ptScreen = ClientToScreen(event.GetPosition());
 364         int dpy = wxDisplay::GetFromPoint(ptScreen);
 365         if ( dpy == wxNOT_FOUND )
 366         {
 367             wxLogError(_T("Mouse clicked outside of display!?"));
 368         }
 369
 370         wxLogStatus(this, _T("Mouse clicked in display %d (at (%d, %d))"),
 371                     dpy, ptScreen.x, ptScreen.y);
 372
 373         ReleaseMouse();
 374     }
 375 }
 376
 377 void MyFrame::OnDisplayChanged(wxDisplayChangedEvent& event)
 378 {
 379     // update the current mode text
 380     for ( int n = 0; n < m_notebook->GetPageCount(); n++ )
 381     {
 382         wxStaticText *label = wxDynamicCast(m_notebook->GetPage(n)->
 383                                                 FindWindow(Display_CurrentMode),
 384                                             wxStaticText);
 385         if ( label )
 386             label->SetLabel(VideoModeToText(wxDisplay(n).GetCurrentMode()));
 387     }
 388
 389
 390     wxLogStatus(this, _T("Display resolution was changed."));
 391
 392     event.Skip();
 393 }
 394