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);
  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     Minimal_Quit = wxID_EXIT,
  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     Minimal_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(Minimal_Quit,  MyFrame::OnQuit)
 100     EVT_MENU(Minimal_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 implements 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(_T("Minimal wxWindows App"));
 123
 124     // and show it (the frames, unlike simple controls, are not shown when
 125     // created initially)
 126     frame->Show(true);
 127
 128     // success: wxApp::OnRun() will be called which will enter the main message
 129     // loop and the application will run. If we returned false here, the
 130     // application would exit immediately.
 131     return true;
 132 }
 133
 134 // ----------------------------------------------------------------------------
 135 // main frame
 136 // ----------------------------------------------------------------------------
 137
 138 // frame constructor
 139 MyFrame::MyFrame(const wxString& title)
 140        : wxFrame(NULL, wxID_ANY, title)
 141 {
 142     // set the frame icon
 143     SetIcon(wxICON(mondrian));
 144
 145 #if wxUSE_MENUS
 146     // create a menu bar
 147     wxMenu *menuFile = new wxMenu;
 148
 149     // the "About" item should be in the help menu
 150     wxMenu *helpMenu = new wxMenu;
 151     helpMenu->Append(Minimal_About, _T("&About...\tF1"), _T("Show about dialog"));
 152
 153     menuFile->Append(Minimal_Quit, _T("E&xit\tAlt-X"), _T("Quit this program"));
 154
 155     // now append the freshly created menu to the menu bar...
 156     wxMenuBar *menuBar = new wxMenuBar();
 157     menuBar->Append(menuFile, _T("&File"));
 158     menuBar->Append(helpMenu, _T("&Help"));
 159
 160     // ... and attach this menu bar to the frame
 161     SetMenuBar(menuBar);
 162 #endif // wxUSE_MENUS
 163
 164 #if wxUSE_STATUSBAR && !defined(__WXWINCE__)
 165     // create a status bar just for fun (by default with 1 pane only)
 166     CreateStatusBar(2);
 167     SetStatusText(_T("Welcome to wxWindows!"));
 168 #endif // wxUSE_STATUSBAR
 169 }
 170
 171
 172 // event handlers
 173
 174 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 175 {
 176     // true is to force the frame to close
 177     Close(true);
 178 }
 179
 180 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 181 {
 182     wxString msg;
 183     msg.Printf( _T("This is the About dialog of the minimal sample.\n")
 184                 _T("Welcome to %s"), wxVERSION_STRING);
 185
 186     wxMessageBox(msg, _T("About Minimal"), wxOK | wxICON_INFORMATION, this);
 187 }