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 and Markus Holzem
   9 // Licence:     wxWindows license
  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 #ifdef __WXGTK__
  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 OnPopupMenu(wxCommandEvent& event);
  74     void OnRightDown(wxMouseEvent& event);
  75
  76 private:
  77     // any class wishing to process wxWindows events must use this macro
  78     DECLARE_EVENT_TABLE()
  79 };
  80
  81 // ----------------------------------------------------------------------------
  82 // constants
  83 // ----------------------------------------------------------------------------
  84
  85 // IDs for the controls and the menu commands
  86 enum
  87 {
  88     // menu items
  89     Minimal_Quit = 1,
  90     Minimal_About,
  91     Minimal_Test1,
  92     Minimal_Test2,
  93
  94     // controls start here (the numbers are, of course, arbitrary)
  95     Minimal_Text = 1000,
  96 };
  97
  98 // ----------------------------------------------------------------------------
  99 // event tables and other macros for wxWindows
 100 // ----------------------------------------------------------------------------
 101
 102 // the event tables connect the wxWindows events with the functions (event
 103 // handlers) which process them. It can be also done at run-time, but for the
 104 // simple menu events like this the static method is much simpler.
 105 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 106     EVT_MENU(Minimal_Quit,  MyFrame::OnQuit)
 107     EVT_MENU(Minimal_About, MyFrame::OnAbout)
 108
 109     EVT_MENU_RANGE(Minimal_Test1, Minimal_Test2, MyFrame::OnPopupMenu)
 110
 111     EVT_RIGHT_DOWN(MyFrame::OnRightDown)
 112 END_EVENT_TABLE()
 113
 114 // Create a new application object: this macro will allow wxWindows to create
 115 // the application object during program execution (it's better than using a
 116 // static object for many reasons) and also declares the accessor function
 117 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 118 // not wxApp)
 119 IMPLEMENT_APP(MyApp)
 120
 121 // ============================================================================
 122 // implementation
 123 // ============================================================================
 124
 125 // ----------------------------------------------------------------------------
 126 // the application class
 127 // ----------------------------------------------------------------------------
 128
 129 // `Main program' equivalent: the program execution "starts" here
 130 bool MyApp::OnInit()
 131 {
 132     // Create the main application window
 133     MyFrame *frame = new MyFrame("Minimal wxWindows App",
 134                                  wxPoint(50, 50), wxSize(450, 340));
 135
 136     // Show it and tell the application that it's our main window
 137     // @@@ what does it do exactly, in fact? is it necessary here?
 138     frame->Show(TRUE);
 139     SetTopWindow(frame);
 140
 141     // success: wxApp::OnRun() will be called which will enter the main message
 142     // loop and the application will run. If we returned FALSE here, the
 143     // application would exit immediately.
 144     return TRUE;
 145 }
 146
 147 // ----------------------------------------------------------------------------
 148 // main frame
 149 // ----------------------------------------------------------------------------
 150
 151 // frame constructor
 152 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 153        : wxFrame((wxFrame *)NULL, -1, title, pos, size)
 154 {
 155     // set the frame icon
 156     SetIcon(wxICON(mondrian));
 157
 158     // create a menu bar
 159     wxMenu *menuFile = new wxMenu;
 160
 161     menuFile->Append(Minimal_About, "&About...");
 162     menuFile->AppendSeparator();
 163     menuFile->Append(Minimal_Quit, "E&xit");
 164
 165     // now append the freshly created menu to the menu bar...
 166     wxMenuBar *menuBar = new wxMenuBar;
 167     menuBar->Append(menuFile, "&File");
 168
 169     // ... and attach this menu bar to the frame
 170     SetMenuBar(menuBar);
 171
 172     // create a status bar just for fun (by default with 1 pane only)
 173     CreateStatusBar(2);
 174     SetStatusText("Welcome to wxWindows!");
 175 }
 176
 177
 178 // event handlers
 179
 180 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 181 {
 182     // TRUE is to force the frame to close
 183     Close(TRUE);
 184 }
 185
 186 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 187 {
 188     wxMessageBox("This is a minimal sample\nA second line in the message box",
 189                  "About Minimal", wxOK | wxICON_INFORMATION, this);
 190 }
 191
 192 void MyFrame::OnPopupMenu(wxCommandEvent& event)
 193 {
 194   wxString str;
 195   str.Printf("Test%d clicked.", event.GetId() == Minimal_Test1 ? 1 : 2);
 196   SetStatusText(str, 1);
 197 }
 198
 199 void MyFrame::OnRightDown(wxMouseEvent& event)
 200 {
 201   class MyMenu : public wxMenu
 202   {
 203   public:
 204     MyMenu()
 205     {
 206       Append(Minimal_Test1, "Test&1");
 207       AppendSeparator();
 208       Append(Minimal_Test2, "Test&2");
 209     }
 210
 211     ~MyMenu() { printf("menu destroyed"); }
 212   } *menu = new MyMenu;
 213
 214   PopupMenu(menu, event.GetX(), event.GetY());
 215 }