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 OnAbout(wxCommandEvent& event);
  70
  71     void OnLeftClick(wxMouseEvent& event);
  72
  73 private:
  74     // any class wishing to process wxWindows events must use this macro
  75     DECLARE_EVENT_TABLE()
  76 };
  77
  78 // ----------------------------------------------------------------------------
  79 // constants
  80 // ----------------------------------------------------------------------------
  81
  82 // IDs for the controls and the menu commands
  83 enum
  84 {
  85     // menu items
  86     Display_Quit = 1,
  87
  88     Display_FromPoint,
  89
  90     // it is important for the id corresponding to the "About" command to have
  91     // this standard value as otherwise it won't be handled properly under Mac
  92     // (where it is special and put into the "Apple" menu)
  93     Display_About = wxID_ABOUT
  94 };
  95
  96 // ----------------------------------------------------------------------------
  97 // event tables and other macros for wxWindows
  98 // ----------------------------------------------------------------------------
  99
 100 // the event tables connect the wxWindows events with the functions (event
 101 // handlers) which process them. It can be also done at run-time, but for the
 102 // simple menu events like this the static method is much simpler.
 103 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 104     EVT_MENU(Display_Quit,  MyFrame::OnQuit)
 105     EVT_MENU(Display_FromPoint,  MyFrame::OnFromPoint)
 106     EVT_MENU(Display_About, MyFrame::OnAbout)
 107
 108     EVT_LEFT_UP(MyFrame::OnLeftClick)
 109 END_EVENT_TABLE()
 110
 111 // Create a new application object: this macro will allow wxWindows to create
 112 // the application object during program execution (it's better than using a
 113 // static object for many reasons) and also declares the accessor function
 114 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 115 // not wxApp)
 116 IMPLEMENT_APP(MyApp)
 117
 118 // ============================================================================
 119 // implementation
 120 // ============================================================================
 121
 122 // ----------------------------------------------------------------------------
 123 // the application class
 124 // ----------------------------------------------------------------------------
 125
 126 // 'Main program' equivalent: the program execution "starts" here
 127 bool MyApp::OnInit()
 128 {
 129     // create the main application window
 130     MyFrame *frame = new MyFrame(_("Display wxWindows Sample"),
 131                                  wxPoint(50, 50), wxSize(450, 340));
 132
 133     // and show it (the frames, unlike simple controls, are not shown when
 134     // created initially)
 135     frame->Show(TRUE);
 136
 137     // success: wxApp::OnRun() will be called which will enter the main message
 138     // loop and the application will run. If we returned FALSE here, the
 139     // application would exit immediately.
 140     return TRUE;
 141 }
 142
 143 // ----------------------------------------------------------------------------
 144 // main frame
 145 // ----------------------------------------------------------------------------
 146
 147 // frame constructor
 148 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size, long style)
 149        : wxFrame(NULL, -1, title, pos, size, style)
 150 {
 151     // set the frame icon
 152     SetIcon(wxICON(mondrian));
 153
 154 #if wxUSE_MENUS
 155     // create a menu bar
 156     wxMenu *menuDisplay = new wxMenu;
 157     menuDisplay->Append(Display_FromPoint, _("&Find from point..."));
 158     menuDisplay->AppendSeparator();
 159     menuDisplay->Append(Display_Quit, _("E&xit\tAlt-X"), _("Quit this program"));
 160
 161     // the "About" item should be in the help menu
 162     wxMenu *helpMenu = new wxMenu;
 163     helpMenu->Append(Display_About, _("&About...\tF1"), _("Show about dialog"));
 164
 165     // now append the freshly created menu to the menu bar...
 166     wxMenuBar *menuBar = new wxMenuBar();
 167     menuBar->Append(menuDisplay, _("&Display"));
 168     menuBar->Append(helpMenu, _("&Help"));
 169
 170     // ... and attach this menu bar to the frame
 171     SetMenuBar(menuBar);
 172 #endif // wxUSE_MENUS
 173
 174     // create status bar
 175     CreateStatusBar();
 176
 177     // create child controls
 178     wxNotebook *notebook = new wxNotebook(this, -1);
 179     const size_t count = wxDisplay::GetCount();
 180     for ( size_t n = 0; n < count; n++ )
 181     {
 182         wxDisplay display(n);
 183
 184         wxWindow *page = new wxPanel(notebook, -1);
 185
 186         // create 2 column flex grid sizer with growable 2nd column
 187         wxFlexGridSizer *sizer = new wxFlexGridSizer(2, 10, 20);
 188         sizer->AddGrowableCol(1);
 189
 190         const wxRect r(display.GetGeometry());
 191         sizer->Add(new wxStaticText(page, -1, _T("Origin: ")));
 192         sizer->Add(new wxStaticText
 193                        (
 194                         page,
 195                         -1,
 196                         wxString::Format(_T("(%d, %d)"),
 197                                          r.x, r.y)
 198                        ));
 199
 200         sizer->Add(new wxStaticText(page, -1, _T("Size: ")));
 201         sizer->Add(new wxStaticText
 202                        (
 203                         page,
 204                         -1,
 205                         wxString::Format(_T("(%d, %d)"),
 206                                          r.width, r.height)
 207                        ));
 208
 209         sizer->Add(new wxStaticText(page, -1, _T("Depth: ")));
 210         sizer->Add(new wxStaticText
 211                        (
 212                         page,
 213                         -1,
 214                         wxString::Format(_T("%d bpp"), display.GetDepth())
 215                        ));
 216
 217         sizer->Add(new wxStaticText(page, -1, _T("Name: ")));
 218         sizer->Add(new wxStaticText(page, -1, display.GetName()));
 219
 220         sizer->Add(new wxStaticText(page, -1, _T("Colour: ")));
 221         sizer->Add(new wxStaticText(page, -1, display.IsColour() ? _T("Yes")
 222                                                                  : _T("No")));
 223
 224         // add it to another sizer to have borders around it
 225         wxSizer *sizerTop = new wxBoxSizer(wxVERTICAL);
 226         sizerTop->Add(sizer, 1, wxALL | wxEXPAND, 10);
 227         page->SetSizer(sizerTop);
 228
 229         notebook->AddPage(page,
 230                           wxString::Format(_T("Display %lu"), (unsigned long)n));
 231     }
 232 }
 233
 234
 235 // event handlers
 236
 237 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 238 {
 239     // TRUE is to force the frame to close
 240     Close(TRUE);
 241 }
 242
 243 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 244 {
 245     wxMessageBox(_T("Demo program for wxDisplay class.\n\n(c) 2003 Vadim Zeitlin"),
 246                  _T("About Display Sample"),
 247                  wxOK | wxICON_INFORMATION,
 248                  this);
 249 }
 250
 251 void MyFrame::OnFromPoint(wxCommandEvent& WXUNUSED(event))
 252 {
 253     SetStatusText(_T("Press the mouse anywhere..."));
 254
 255     CaptureMouse();
 256 }
 257
 258 void MyFrame::OnLeftClick(wxMouseEvent& event)
 259 {
 260     if ( HasCapture() )
 261     {
 262         // mouse events are in client coords, wxDisplay works in screen ones
 263         const wxPoint ptScreen = ClientToScreen(event.GetPosition());
 264         int dpy = wxDisplay::GetFromPoint(ptScreen);
 265         if ( dpy == wxNOT_FOUND )
 266         {
 267             wxLogError(_T("Mouse clicked outside of display!!"));
 268         }
 269
 270         wxLogStatus(this, _T("Mouse clicked in display %d (at (%d, %d))"),
 271                     dpy, ptScreen.x, ptScreen.y);
 272
 273         ReleaseMouse();
 274     }
 275 }
 276