samples/minimal/minimal.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        minimal.cpp
   3 // Purpose:     Minimal wxWidgets 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" wxWidgets 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 and even
  38 // though we could still include the XPM here it would be unused)
  39 #if !defined(__WXMSW__) && !defined(__WXPM__)
  40     #include "../sample.xpm"
  41 #endif
  42
  43 //###include "dmalloc.h"
  44 // ----------------------------------------------------------------------------
  45 // private classes
  46 // ----------------------------------------------------------------------------
  47
  48 // Define a new application type, each program should derive a class from wxApp
  49 class MyApp : public wxApp
  50 {
  51 public:
  52     // override base class virtuals
  53     // ----------------------------
  54
  55     // this one is called on application startup and is a good place for the app
  56     // initialization (doing it here and not in the ctor allows to have an error
  57     // return: if OnInit() returns false, the application terminates)
  58     virtual bool OnInit();
  59 };
  60
  61 // Define a new frame type: this is going to be our main frame
  62 class MyFrame : public wxFrame
  63 {
  64 public:
  65     // ctor(s)
  66     MyFrame(const wxString& title);
  67
  68     // event handlers (these functions should _not_ be virtual)
  69     void OnQuit(wxCommandEvent& event);
  70     void OnAbout(wxCommandEvent& event);
  71
  72 private:
  73     // any class wishing to process wxWidgets events must use this macro
  74     DECLARE_EVENT_TABLE()
  75 };
  76
  77 // ----------------------------------------------------------------------------
  78 // constants
  79 // ----------------------------------------------------------------------------
  80
  81 // IDs for the controls and the menu commands
  82 enum
  83 {
  84     // menu items
  85     Minimal_Quit = wxID_EXIT,
  86
  87     // it is important for the id corresponding to the "About" command to have
  88     // this standard value as otherwise it won't be handled properly under Mac
  89     // (where it is special and put into the "Apple" menu)
  90     Minimal_About = wxID_ABOUT
  91 };
  92
  93 // ----------------------------------------------------------------------------
  94 // event tables and other macros for wxWidgets
  95 // ----------------------------------------------------------------------------
  96
  97 // the event tables connect the wxWidgets events with the functions (event
  98 // handlers) which process them. It can be also done at run-time, but for the
  99 // simple menu events like this the static method is much simpler.
 100 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 101     EVT_MENU(Minimal_Quit,  MyFrame::OnQuit)
 102     EVT_MENU(Minimal_About, MyFrame::OnAbout)
 103 END_EVENT_TABLE()
 104
 105 // Create a new application object: this macro will allow wxWidgets to create
 106 // the application object during program execution (it's better than using a
 107 // static object for many reasons) and also implements the accessor function
 108 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 109 // not wxApp)
 110 IMPLEMENT_APP(MyApp)
 111
 112 // ============================================================================
 113 // implementation
 114 // ============================================================================
 115
 116 // ----------------------------------------------------------------------------
 117 // the application class
 118 // ----------------------------------------------------------------------------
 119
 120 // 'Main program' equivalent: the program execution "starts" here
 121 bool MyApp::OnInit()
 122 {
 123     // call the base class initialization method, currently it only parses a
 124     // few common command-line options but it could be do more in the future
 125     if ( !wxApp::OnInit() )
 126         return false;
 127
 128     // create the main application window
 129     MyFrame *frame = new MyFrame(_T("Minimal wxWidgets App"));
 130
 131     // and show it (the frames, unlike simple controls, are not shown when
 132     // created initially)
 133     frame->Show(true);
 134
 135     // success: wxApp::OnRun() will be called which will enter the main message
 136     // loop and the application will run. If we returned false here, the
 137     // application would exit immediately.
 138     return true;
 139 }
 140
 141 // ----------------------------------------------------------------------------
 142 // main frame
 143 // ----------------------------------------------------------------------------
 144
 145 // frame constructor
 146 MyFrame::MyFrame(const wxString& title)
 147        : wxFrame(NULL, wxID_ANY, title)
 148 {
 149     // set the frame icon
 150     SetIcon(wxICON(sample));
 151
 152 //   char * c = new char [100] ;
 153 //   strcpy (c, "hello");
 154 #if wxUSE_MENUS
 155     // create a menu bar
 156     wxMenu *fileMenu = new wxMenu;
 157
 158     // the "About" item should be in the help menu
 159     wxMenu *helpMenu = new wxMenu;
 160     helpMenu->Append(Minimal_About, "hello", _T("Show about dialog"));
 161
 162     fileMenu->Append(Minimal_Quit, _T("E&xit\tAlt-X"), _T("Quit this program"));
 163
 164     // now append the freshly created menu to the menu bar...
 165     wxMenuBar *menuBar = new wxMenuBar();
 166     menuBar->Append(fileMenu, _T("&File"));
 167     menuBar->Append(helpMenu, _T("&Help"));
 168
 169     // ... and attach this menu bar to the frame
 170     SetMenuBar(menuBar);
 171 #endif // wxUSE_MENUS
 172
 173 #if wxUSE_STATUSBAR
 174     // create a status bar just for fun (by default with 1 pane only)
 175     CreateStatusBar(2);
 176     SetStatusText(_T("Welcome to wxWidgets!"));
 177 #endif // wxUSE_STATUSBAR
 178 }
 179
 180
 181 // event handlers
 182
 183 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 184 {
 185     // true is to force the frame to close
 186     Close(true);
 187 }
 188
 189 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 190 {
 191     wxMessageBox(wxString::Format(
 192                     _T("Welcome to %s!\n")
 193                     _T("\n")
 194                     _T("This is the minimal wxWidgets sample\n")
 195                     _T("running under %s."),
 196                     wxVERSION_STRING,
 197                     wxGetOsDescription().c_str()
 198                  ),
 199                  _T("About wxWidgets minimal sample"),
 200                  wxOK | wxICON_INFORMATION,
 201                  this);
 202 }