samples/minimal/minimal.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        minimal.cpp
   3 // Purpose:     Minimal wxWindows sample
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19 #ifdef __GNUG__
  20     #pragma implementation "minimal.cpp"
  21     #pragma interface "minimal.cpp"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx/wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 // for all others, include the necessary headers (this file is usually all you
  32 // need because it includes almost all "standard" wxWindows headers
  33 #ifndef WX_PRECOMP
  34     #include "wx/wx.h"
  35 #endif
  36
  37 // ----------------------------------------------------------------------------
  38 // ressources
  39 // ----------------------------------------------------------------------------
  40 // the application icon
  41 #if defined(__WXGTK__) || defined(__WXMOTIF__)
  42     #include "mondrian.xpm"
  43 #endif
  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
  69     // event handlers (these functions should _not_ be virtual)
  70     void OnQuit(wxCommandEvent& event);
  71     void OnAbout(wxCommandEvent& event);
  72
  73     void OnPaint(wxPaintEvent& event);
  74
  75 private:
  76     // any class wishing to process wxWindows events must use this macro
  77     DECLARE_EVENT_TABLE()
  78 };
  79
  80 // ----------------------------------------------------------------------------
  81 // constants
  82 // ----------------------------------------------------------------------------
  83
  84 // IDs for the controls and the menu commands
  85 enum
  86 {
  87     // menu items
  88     Minimal_Quit = 1,
  89     Minimal_About,
  90 };
  91
  92 // ----------------------------------------------------------------------------
  93 // event tables and other macros for wxWindows
  94 // ----------------------------------------------------------------------------
  95
  96 // the event tables connect the wxWindows events with the functions (event
  97 // handlers) which process them. It can be also done at run-time, but for the
  98 // simple menu events like this the static method is much simpler.
  99 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 100     EVT_MENU(Minimal_Quit,  MyFrame::OnQuit)
 101     EVT_MENU(Minimal_About, MyFrame::OnAbout)
 102 END_EVENT_TABLE()
 103
 104 // Create a new application object: this macro will allow wxWindows to create
 105 // the application object during program execution (it's better than using a
 106 // static object for many reasons) and also declares the accessor function
 107 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 108 // not wxApp)
 109 IMPLEMENT_APP(MyApp)
 110
 111 // ============================================================================
 112 // implementation
 113 // ============================================================================
 114
 115 // ----------------------------------------------------------------------------
 116 // the application class
 117 // ----------------------------------------------------------------------------
 118
 119 // `Main program' equivalent: the program execution "starts" here
 120 bool MyApp::OnInit()
 121 {
 122     // Create the main application window
 123     MyFrame *frame = new MyFrame("Minimal wxWindows App",
 124                                  wxPoint(50, 50), wxSize(450, 340));
 125
 126     // Show it and tell the application that it's our main window
 127     // @@@ what does it do exactly, in fact? is it necessary here?
 128     frame->Show(TRUE);
 129     SetTopWindow(frame);
 130
 131     // success: wxApp::OnRun() will be called which will enter the main message
 132     // loop and the application will run. If we returned FALSE here, the
 133     // application would exit immediately.
 134     return TRUE;
 135 }
 136
 137 // ----------------------------------------------------------------------------
 138 // main frame
 139 // ----------------------------------------------------------------------------
 140
 141 // frame constructor
 142 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 143        : wxFrame((wxFrame *)NULL, -1, title, pos, size)
 144 {
 145     // set the frame icon
 146     SetIcon(wxICON(mondrian));
 147
 148     // create a menu bar
 149     wxMenu *menuFile = new wxMenu("", wxMENU_TEAROFF);
 150
 151     menuFile->Append(Minimal_About, "&About...\tCtrl-A", "Show about dialog");
 152     menuFile->AppendSeparator();
 153     menuFile->Append(Minimal_Quit, "E&xit\tAlt-X", "Quit this program");
 154
 155     // now append the freshly created menu to the menu bar...
 156     wxMenuBar *menuBar = new wxMenuBar();
 157     menuBar->Append(menuFile, "&File");
 158
 159     // ... and attach this menu bar to the frame
 160     SetMenuBar(menuBar);
 161
 162 #if wxUSE_STATUSBAR
 163     // create a status bar just for fun (by default with 1 pane only)
 164     CreateStatusBar(2);
 165     SetStatusText("Welcome to wxWindows!");
 166 #endif // wxUSE_STATUSBAR
 167 }
 168
 169
 170 // event handlers
 171
 172 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 173 {
 174     // TRUE is to force the frame to close
 175     Close(TRUE);
 176 }
 177
 178 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 179 {
 180     wxString msg;
 181     msg.Printf( _T("This is the about dialog of minimal sample.\n")
 182                 _T("Welcome to %s")
 183 #ifdef wxBETA_NUMBER
 184                _T(" (beta %d)!")
 185 #endif // wxBETA_NUMBER
 186                , wxVERSION_STRING
 187 #ifdef wxBETA_NUMBER
 188                , wxBETA_NUMBER
 189 #endif // wxBETA_NUMBER
 190               );
 191
 192     wxMessageBox(msg, "About Minimal", wxOK | wxICON_INFORMATION, this);
 193 }
 194