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 // for all others, include the necessary headers explicitly
  28 #ifndef WX_PRECOMP
  29     #include "wx/app.h"
  30     #include "wx/frame.h"
  31
  32     #include "wx/stattext.h"
  33
  34     #include "wx/layout.h"
  35 #endif
  36
  37 #include "wx/notebook.h"
  38
  39 #include "wx/display.h"
  40
  41 // ----------------------------------------------------------------------------
  42 // private classes
  43 // ----------------------------------------------------------------------------
  44
  45 // Define a new application type, each program should derive a class from wxApp
  46 class MyApp : public wxApp
  47 {
  48 public:
  49     // override base class virtuals
  50     // ----------------------------
  51
  52     // this one is called on application startup and is a good place for the app
  53     // initialization (doing it here and not in the ctor allows to have an error
  54     // return: if OnInit() returns false, the application terminates)
  55     virtual bool OnInit();
  56 };
  57
  58 // Define a new frame type: this is going to be our main frame
  59 class MyFrame : public wxFrame
  60 {
  61 public:
  62     // ctor(s)
  63     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size,
  64             long style = wxDEFAULT_FRAME_STYLE);
  65
  66     // event handlers (these functions should _not_ be virtual)
  67     void OnQuit(wxCommandEvent& event);
  68     void OnFromPoint(wxCommandEvent& event);
  69     void OnFullScreen(wxCommandEvent& event);
  70     void OnAbout(wxCommandEvent& event);
  71
  72     void OnChangeMode(wxCommandEvent& event);
  73     void OnResetMode(wxCommandEvent& event);
  74
  75     void OnLeftClick(wxMouseEvent& event);
  76
  77     void OnDisplayChanged(wxDisplayChangedEvent& event);
  78
  79 private:
  80     // convert video mode to textual description
  81     wxString VideoModeToText(const wxVideoMode& mode);
  82
  83     // GUI controls
  84     wxNotebook *m_notebook;
  85
  86     // any class wishing to process wxWindows events must use this macro
  87     DECLARE_EVENT_TABLE()
  88 };
  89
  90 // Client data class for the choice control containing the video modes
  91 class MyVideoModeClientData : public wxClientData
  92 {
  93 public:
  94     MyVideoModeClientData(const wxVideoMode& m) : mode(m) { }
  95
  96     const wxVideoMode mode;
  97 };
  98
  99 // ----------------------------------------------------------------------------
 100 // constants
 101 // ----------------------------------------------------------------------------
 102
 103 // IDs for the controls and the menu commands
 104 enum
 105 {
 106     // menu items
 107     Display_Quit = 1,
 108
 109     Display_FromPoint,
 110     Display_FullScreen,
 111
 112     // controls
 113     Display_ChangeMode = 1000,
 114     Display_ResetMode,
 115     Display_CurrentMode,
 116
 117
 118     // it is important for the id corresponding to the "About" command to have
 119     // this standard value as otherwise it won't be handled properly under Mac
 120     // (where it is special and put into the "Apple" menu)
 121     Display_About = wxID_ABOUT
 122 };
 123
 124 // ----------------------------------------------------------------------------
 125 // event tables and other macros for wxWindows
 126 // ----------------------------------------------------------------------------
 127
 128 // the event tables connect the wxWindows events with the functions (event
 129 // handlers) which process them. It can be also done at run-time, but for the
 130 // simple menu events like this the static method is much simpler.
 131 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 132     EVT_MENU(Display_Quit,  MyFrame::OnQuit)
 133     EVT_MENU(Display_FromPoint,  MyFrame::OnFromPoint)
 134     EVT_MENU(Display_FullScreen, MyFrame::OnFullScreen)
 135     EVT_MENU(Display_About, MyFrame::OnAbout)
 136
 137     EVT_CHOICE(Display_ChangeMode, MyFrame::OnChangeMode)
 138     EVT_BUTTON(Display_ResetMode, MyFrame::OnResetMode)
 139
 140     EVT_LEFT_UP(MyFrame::OnLeftClick)
 141
 142
 143     EVT_DISPLAY_CHANGED(MyFrame::OnDisplayChanged)
 144 END_EVENT_TABLE()
 145
 146 // Create a new application object: this macro will allow wxWindows to create
 147 // the application object during program execution (it's better than using a
 148 // static object for many reasons) and also declares the accessor function
 149 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 150 // not wxApp)
 151 IMPLEMENT_APP(MyApp)
 152
 153 // ============================================================================
 154 // implementation
 155 // ============================================================================
 156
 157 // ----------------------------------------------------------------------------
 158 // the application class
 159 // ----------------------------------------------------------------------------
 160
 161 // 'Main program' equivalent: the program execution "starts" here
 162 bool MyApp::OnInit()
 163 {
 164     // create the main application window
 165     MyFrame *frame = new MyFrame(_("Display wxWindows Sample"),
 166                                  wxPoint(50, 50), wxSize(450, 340));
 167
 168     // and show it (the frames, unlike simple controls, are not shown when
 169     // created initially)
 170     frame->Show();
 171
 172     // success: wxApp::OnRun() will be called which will enter the main message
 173     // loop and the application will run. If we returned FALSE here, the
 174     // application would exit immediately.
 175     return TRUE;
 176 }
 177
 178 // ----------------------------------------------------------------------------
 179 // main frame
 180 // ----------------------------------------------------------------------------
 181
 182 // frame constructor
 183 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size, long style)
 184        : wxFrame(NULL, -1, title, pos, size, style)
 185 {
 186     // set the frame icon
 187     SetIcon(wxICON(mondrian));
 188
 189 #if wxUSE_MENUS
 190     // create a menu bar
 191     wxMenu *menuDisplay = new wxMenu;
 192     menuDisplay->Append(Display_FromPoint, _("Find from &point..."));
 193     menuDisplay->AppendSeparator();
 194     menuDisplay->AppendCheckItem(Display_FullScreen, _("Full &screen\tF12"));
 195     menuDisplay->AppendSeparator();
 196     menuDisplay->Append(Display_Quit, _("E&xit\tAlt-X"), _("Quit this program"));
 197
 198     // the "About" item should be in the help menu
 199     wxMenu *helpMenu = new wxMenu;
 200     helpMenu->Append(Display_About, _("&About...\tF1"), _("Show about dialog"));
 201
 202     // now append the freshly created menu to the menu bar...
 203     wxMenuBar *menuBar = new wxMenuBar();
 204     menuBar->Append(menuDisplay, _("&Display"));
 205     menuBar->Append(helpMenu, _("&Help"));
 206
 207     // ... and attach this menu bar to the frame
 208     SetMenuBar(menuBar);
 209 #endif // wxUSE_MENUS
 210
 211     // create status bar
 212     CreateStatusBar();
 213
 214     // create child controls
 215     m_notebook = new wxNotebook(this, -1);
 216     const size_t count = wxDisplay::GetCount();
 217     for ( size_t nDpy = 0; nDpy < count; nDpy++ )
 218     {
 219         wxDisplay display(nDpy);
 220
 221         wxWindow *page = new wxPanel(m_notebook, -1);
 222
 223         // create 2 column flex grid sizer with growable 2nd column
 224         wxFlexGridSizer *sizer = new wxFlexGridSizer(2, 10, 20);
 225         sizer->AddGrowableCol(1);
 226
 227         const wxRect r(display.GetGeometry());
 228         sizer->Add(new wxStaticText(page, -1, _T("Origin: ")));
 229         sizer->Add(new wxStaticText
 230                        (
 231                         page,
 232                         -1,
 233                         wxString::Format(_T("(%d, %d)"),
 234                                          r.x, r.y)
 235                        ));
 236
 237         sizer->Add(new wxStaticText(page, -1, _T("Size: ")));
 238         sizer->Add(new wxStaticText
 239                        (
 240                         page,
 241                         -1,
 242                         wxString::Format(_T("(%d, %d)"),
 243                                          r.width, r.height)
 244                        ));
 245
 246
 247         sizer->Add(new wxStaticText(page, -1, _T("Name: ")));
 248         sizer->Add(new wxStaticText(page, -1, display.GetName()));
 249
 250         wxChoice *choiceModes = new wxChoice(page, Display_ChangeMode);
 251         const wxArrayVideoModes modes = display.GetModes();
 252         const size_t count = modes.GetCount();
 253         for ( size_t nMode = 0; nMode < count; nMode++ )
 254         {
 255             const wxVideoMode& mode = modes[nMode];
 256
 257             choiceModes->Append(VideoModeToText(mode),
 258                                 new MyVideoModeClientData(mode));
 259         }
 260
 261         sizer->Add(new wxStaticText(page, -1, _T("&Modes: ")));
 262         sizer->Add(choiceModes, 0, wxEXPAND);
 263
 264         sizer->Add(new wxStaticText(page, -1, _T("Current: ")));
 265         sizer->Add(new wxStaticText(page, Display_CurrentMode,
 266                                     VideoModeToText(display.GetCurrentMode())));
 267
 268         // add it to another sizer to have borders around it and button below
 269         wxSizer *sizerTop = new wxBoxSizer(wxVERTICAL);
 270         sizerTop->Add(sizer, 1, wxALL | wxEXPAND, 10);
 271         sizerTop->Add(new wxButton(page, Display_ResetMode, _T("&Reset mode")),
 272                       0, wxALL | wxCENTRE, 5);
 273         page->SetSizer(sizerTop);
 274
 275         m_notebook->AddPage(page,
 276                             wxString::Format(_T("Display %lu"),
 277                                              (unsigned long)nDpy));
 278     }
 279 }
 280
 281 wxString MyFrame::VideoModeToText(const wxVideoMode& mode)
 282 {
 283     wxString s;
 284     s.Printf(_T("%dx%d"), mode.w, mode.h);
 285
 286     if ( mode.bpp )
 287     {
 288         s += wxString::Format(_T(", %dbpp"), mode.bpp);
 289     }
 290
 291     if ( mode.refresh )
 292     {
 293         s += wxString::Format(_T(", %dHz"), mode.refresh);
 294     }
 295
 296     return s;
 297 }
 298
 299 // event handlers
 300
 301 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 302 {
 303     // TRUE is to force the frame to close
 304     Close(TRUE);
 305 }
 306
 307 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 308 {
 309     wxDisplay dpy(1);
 310     if ( !dpy.ChangeMode(wxVideoMode(800, 600)) )
 311     {
 312         wxLogError("Failed!");
 313         return;
 314     }
 315
 316     wxMessageBox(_T("Demo program for wxDisplay class.\n\n(c) 2003 Vadim Zeitlin"),
 317                  _T("About Display Sample"),
 318                  wxOK | wxICON_INFORMATION,
 319                  this);
 320 }
 321
 322 void MyFrame::OnFromPoint(wxCommandEvent& WXUNUSED(event))
 323 {
 324     SetStatusText(_T("Press the mouse anywhere..."));
 325
 326     CaptureMouse();
 327 }
 328
 329 void MyFrame::OnFullScreen(wxCommandEvent& event)
 330 {
 331     ShowFullScreen(event.IsChecked());
 332 }
 333
 334 void MyFrame::OnChangeMode(wxCommandEvent& event)
 335 {
 336     wxDisplay dpy(m_notebook->GetSelection());
 337
 338     // you wouldn't write this in real code, would you?
 339     if ( !dpy.ChangeMode(((MyVideoModeClientData *)
 340                 wxDynamicCast(event.GetEventObject(), wxChoice)->
 341                     GetClientObject(event.GetInt()))->mode) )
 342     {
 343         wxLogError(_T("Changing video mode failed!"));
 344     }
 345 }
 346
 347 void MyFrame::OnResetMode(wxCommandEvent& WXUNUSED(event))
 348 {
 349     wxDisplay dpy(m_notebook->GetSelection());
 350
 351     dpy.ResetMode();
 352 }
 353
 354 void MyFrame::OnLeftClick(wxMouseEvent& event)
 355 {
 356     if ( HasCapture() )
 357     {
 358         // mouse events are in client coords, wxDisplay works in screen ones
 359         const wxPoint ptScreen = ClientToScreen(event.GetPosition());
 360         int dpy = wxDisplay::GetFromPoint(ptScreen);
 361         if ( dpy == wxNOT_FOUND )
 362         {
 363             wxLogError(_T("Mouse clicked outside of display!?"));
 364         }
 365
 366         wxLogStatus(this, _T("Mouse clicked in display %d (at (%d, %d))"),
 367                     dpy, ptScreen.x, ptScreen.y);
 368
 369         ReleaseMouse();
 370     }
 371 }
 372
 373 void MyFrame::OnDisplayChanged(wxDisplayChangedEvent& event)
 374 {
 375     // update the current mode text
 376     for ( int n = 0; n < m_notebook->GetPageCount(); n++ )
 377     {
 378         wxStaticText *label = wxDynamicCast(m_notebook->GetPage(n)->
 379                                                 FindWindow(Display_CurrentMode),
 380                                             wxStaticText);
 381         if ( label )
 382             label->SetLabel(VideoModeToText(wxDisplay(n).GetCurrentMode()));
 383     }
 384
 385
 386     wxLogStatus(this, _T("Display resolution was changed."));
 387
 388     event.Skip();
 389 }
 390