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 OnAbout(wxCommandEvent& event);
  69
  70 private:
  71     // any class wishing to process wxWindows events must use this macro
  72     DECLARE_EVENT_TABLE()
  73 };
  74
  75 // ----------------------------------------------------------------------------
  76 // constants
  77 // ----------------------------------------------------------------------------
  78
  79 // IDs for the controls and the menu commands
  80 enum
  81 {
  82     // menu items
  83     Display_Quit = 1,
  84
  85     // it is important for the id corresponding to the "About" command to have
  86     // this standard value as otherwise it won't be handled properly under Mac
  87     // (where it is special and put into the "Apple" menu)
  88     Display_About = wxID_ABOUT
  89 };
  90
  91 // ----------------------------------------------------------------------------
  92 // event tables and other macros for wxWindows
  93 // ----------------------------------------------------------------------------
  94
  95 // the event tables connect the wxWindows events with the functions (event
  96 // handlers) which process them. It can be also done at run-time, but for the
  97 // simple menu events like this the static method is much simpler.
  98 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  99     EVT_MENU(Display_Quit,  MyFrame::OnQuit)
 100     EVT_MENU(Display_About, MyFrame::OnAbout)
 101 END_EVENT_TABLE()
 102
 103 // Create a new application object: this macro will allow wxWindows to create
 104 // the application object during program execution (it's better than using a
 105 // static object for many reasons) and also declares the accessor function
 106 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 107 // not wxApp)
 108 IMPLEMENT_APP(MyApp)
 109
 110 // ============================================================================
 111 // implementation
 112 // ============================================================================
 113
 114 // ----------------------------------------------------------------------------
 115 // the application class
 116 // ----------------------------------------------------------------------------
 117
 118 // 'Main program' equivalent: the program execution "starts" here
 119 bool MyApp::OnInit()
 120 {
 121     // create the main application window
 122     MyFrame *frame = new MyFrame(_("Display wxWindows Sample"),
 123                                  wxPoint(50, 50), wxSize(450, 340));
 124
 125     // and show it (the frames, unlike simple controls, are not shown when
 126     // created initially)
 127     frame->Show(TRUE);
 128
 129     // success: wxApp::OnRun() will be called which will enter the main message
 130     // loop and the application will run. If we returned FALSE here, the
 131     // application would exit immediately.
 132     return TRUE;
 133 }
 134
 135 // ----------------------------------------------------------------------------
 136 // main frame
 137 // ----------------------------------------------------------------------------
 138
 139 // frame constructor
 140 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size, long style)
 141        : wxFrame(NULL, -1, title, pos, size, style)
 142 {
 143     // set the frame icon
 144     SetIcon(wxICON(mondrian));
 145
 146 #if wxUSE_MENUS
 147     // create a menu bar
 148     wxMenu *menuFile = new wxMenu;
 149
 150     // the "About" item should be in the help menu
 151     wxMenu *helpMenu = new wxMenu;
 152     helpMenu->Append(Display_About, _("&About...\tF1"), _("Show about dialog"));
 153
 154     menuFile->Append(Display_Quit, _("E&xit\tAlt-X"), _("Quit this program"));
 155
 156     // now append the freshly created menu to the menu bar...
 157     wxMenuBar *menuBar = new wxMenuBar();
 158     menuBar->Append(menuFile, _("&File"));
 159     menuBar->Append(helpMenu, _("&Help"));
 160
 161     // ... and attach this menu bar to the frame
 162     SetMenuBar(menuBar);
 163 #endif // wxUSE_MENUS
 164
 165     // create child controls
 166     wxNotebook *notebook = new wxNotebook(this, -1);
 167     const size_t count = wxDisplay::GetCount();
 168     for ( size_t n = 0; n < count; n++ )
 169     {
 170         wxDisplay display(n);
 171
 172         wxWindow *page = new wxPanel(notebook, -1);
 173
 174         // create 2 column flex grid sizer with growable 2nd column
 175         wxFlexGridSizer *sizer = new wxFlexGridSizer(2, 10, 20);
 176         sizer->AddGrowableCol(1);
 177
 178         const wxRect r(display.GetGeometry());
 179         sizer->Add(new wxStaticText(page, -1, _T("Geometry: ")));
 180         sizer->Add(new wxStaticText
 181                        (
 182                         page,
 183                         -1,
 184                         wxString::Format(_T("(%d, %d)-(%d, %d)"),
 185                                          r.x, r.y,
 186                                          r.x + r.width, r.y + r.height)
 187                        ));
 188
 189         sizer->Add(new wxStaticText(page, -1, _T("Depth: ")));
 190         sizer->Add(new wxStaticText
 191                        (
 192                         page,
 193                         -1,
 194                         wxString::Format(_T("%d bpp"), display.GetDepth())
 195                        ));
 196
 197         sizer->Add(new wxStaticText(page, -1, _T("Colour: ")));
 198         sizer->Add(new wxStaticText(page, -1, display.IsColour() ? _T("Yes")
 199                                                                  : _T("No")));
 200
 201         // add it to another sizer to have borders around it
 202         wxSizer *sizerTop = new wxBoxSizer(wxVERTICAL);
 203         sizerTop->Add(sizer, 1, wxALL | wxEXPAND, 10);
 204         page->SetSizer(sizerTop);
 205
 206         notebook->AddPage(page,
 207                           wxString::Format(_T("Display %lu"), (unsigned long)n));
 208     }
 209 }
 210
 211
 212 // event handlers
 213
 214 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 215 {
 216     // TRUE is to force the frame to close
 217     Close(TRUE);
 218 }
 219
 220 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 221 {
 222     wxMessageBox(_T("Demo program for wxDisplay class.\n\n(c) 2003 Vadim Zeitlin"),
 223                  _T("About Display Sample"),
 224                  wxOK | wxICON_INFORMATION,
 225                  this);
 226 }