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
  20 // For compilers that support precompilation, includes "wx/wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 // for all others, include the necessary headers (this file is usually all you
  28 // need because it includes almost all "standard" wxWindows headers)
  29 #ifndef WX_PRECOMP
  30     #include "wx/wx.h"
  31 #endif
  32
  33 // ----------------------------------------------------------------------------
  34 // resources
  35 // ----------------------------------------------------------------------------
  36
  37 // the application icon (under Windows and OS/2 it is in resources)
  38 #if defined(__WXGTK__) || defined(__WXMOTIF__) || defined(__WXMAC__) || defined(__WXMGL__) || defined(__WXX11__)
  39     #include "mondrian.xpm"
  40 #endif
  41
  42 // ----------------------------------------------------------------------------
  43 // private classes
  44 // ----------------------------------------------------------------------------
  45
  46 // Define a new application type, each program should derive a class from wxApp
  47 class MyApp : public wxApp
  48 {
  49 public:
  50     // override base class virtuals
  51     // ----------------------------
  52
  53     // this one is called on application startup and is a good place for the app
  54     // initialization (doing it here and not in the ctor allows to have an error
  55     // return: if OnInit() returns false, the application terminates)
  56     virtual bool OnInit();
  57 };
  58
  59 // Define a new frame type: this is going to be our main frame
  60 class MyFrame : public wxFrame
  61 {
  62 public:
  63     // ctor(s)
  64     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size,
  65             long style = wxDEFAULT_FRAME_STYLE);
  66
  67     // event handlers (these functions should _not_ be virtual)
  68     void OnQuit(wxCommandEvent& event);
  69     void OnAbout(wxCommandEvent& event);
  70
  71 private:
  72     // any class wishing to process wxWindows events must use this macro
  73     DECLARE_EVENT_TABLE()
  74 };
  75
  76 // ----------------------------------------------------------------------------
  77 // constants
  78 // ----------------------------------------------------------------------------
  79
  80 // IDs for the controls and the menu commands
  81 enum
  82 {
  83     // menu items
  84     Minimal_Quit = 1,
  85
  86     // it is important for the id corresponding to the "About" command to have
  87     // this standard value as otherwise it won't be handled properly under Mac
  88     // (where it is special and put into the "Apple" menu)
  89     Minimal_About = wxID_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(_T("Minimal wxWindows App"),
 124                                  wxPoint(50, 50), wxSize(450, 340));
 125
 126     // and show it (the frames, unlike simple controls, are not shown when
 127     // created initially)
 128     frame->Show(TRUE);
 129
 130     // success: wxApp::OnRun() will be called which will enter the main message
 131     // loop and the application will run. If we returned FALSE here, the
 132     // application would exit immediately.
 133     return TRUE;
 134 }
 135
 136 // ----------------------------------------------------------------------------
 137 // main frame
 138 // ----------------------------------------------------------------------------
 139
 140 // frame constructor
 141 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size, long style)
 142        : wxFrame(NULL, -1, title, pos, size, style)
 143 {
 144     // set the frame icon
 145     SetIcon(wxICON(mondrian));
 146
 147 #if wxUSE_MENUS
 148     // create a menu bar
 149     wxMenu *menuFile = new wxMenu;
 150
 151     // the "About" item should be in the help menu
 152     wxMenu *helpMenu = new wxMenu;
 153     helpMenu->Append(Minimal_About, _T("&About...\tF1"), _T("Show about dialog"));
 154
 155     menuFile->Append(Minimal_Quit, _T("E&xit\tAlt-X"), _T("Quit this program"));
 156
 157     // now append the freshly created menu to the menu bar...
 158     wxMenuBar *menuBar = new wxMenuBar();
 159     menuBar->Append(menuFile, _T("&File"));
 160     menuBar->Append(helpMenu, _T("&Help"));
 161
 162     // ... and attach this menu bar to the frame
 163     SetMenuBar(menuBar);
 164 #endif // wxUSE_MENUS
 165
 166 #if wxUSE_STATUSBAR
 167     // create a status bar just for fun (by default with 1 pane only)
 168     CreateStatusBar(2);
 169     SetStatusText(_T("Welcome to wxWindows!"));
 170 #endif // wxUSE_STATUSBAR
 171 }
 172
 173
 174 // event handlers
 175
 176 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 177 {
 178     // TRUE is to force the frame to close
 179     Close(TRUE);
 180 }
 181
 182 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 183 {
 184     wxString msg;
 185     msg.Printf( _T("This is the About dialog of the minimal sample.\n")
 186                 _T("Welcome to %s"), wxVERSION_STRING);
 187
 188     wxMessageBox(msg, _T("About Minimal"), wxOK | wxICON_INFORMATION, this);
 189 }