1 /////////////////////////////////////////////////////////////////////////////
2 // Name: minimal.cpp
3 // Purpose: Minimal wxWidgets sample
4 // Author: Julian Smart
5 // Modified by:
6 // Created: 04/01/98
7 // Copyright: (c) Julian Smart
8 // Licence: wxWindows licence
9 /////////////////////////////////////////////////////////////////////////////
10
11 // ============================================================================
12 // declarations
13 // ============================================================================
14
15 // ----------------------------------------------------------------------------
16 // headers
17 // ----------------------------------------------------------------------------
18
19 // For compilers that support precompilation, includes "wx/wx.h".
20 #include "wx/wxprec.h"
21
22
23 // for all others, include the necessary headers (this file is usually all you
24 // need because it includes almost all "standard" wxWidgets headers)
25 #ifndef WX_PRECOMP
26 #include "wx/wx.h"
27 #endif
28
29 // ----------------------------------------------------------------------------
30 // resources
31 // ----------------------------------------------------------------------------
32
33
34 // ----------------------------------------------------------------------------
35 // private classes
36 // ----------------------------------------------------------------------------
37
38 // Define a new application type, each program should derive a class from wxApp
39 class MyApp : public wxApp
40 {
41 public:
42 // override base class virtuals
43 // ----------------------------
44
45 // this one is called on application startup and is a good place for the app
46 // initialization (doing it here and not in the ctor allows to have an error
47 // return: if OnInit() returns false, the application terminates)
48 virtual bool OnInit();
49 };
50
51 // Define a new frame type: this is going to be our main frame
52 class MyFrame : public wxFrame
53 {
54 public:
55 // ctor(s)
56 MyFrame(const wxString& title);
57
58 // event handlers (these functions should _not_ be virtual)
59 void OnQuit(wxCommandEvent& event);
60 void OnAbout(wxCommandEvent& event);
61
62 private:
63 // any class wishing to process wxWindows events must use this macro
64 wxDECLARE_EVENT_TABLE();
65 };
66
67 // ----------------------------------------------------------------------------
68 // constants
69 // ----------------------------------------------------------------------------
70
71 // IDs for the controls and the menu commands
72 enum
73 {
74 // menu items
75 Minimal_Quit = wxID_EXIT,
76
77 // it is important for the id corresponding to the "About" command to have
78 // this standard value as otherwise it won't be handled properly under Mac
79 // (where it is special and put into the "Apple" menu)
80 Minimal_About = wxID_ABOUT
81 };
82
83 // ----------------------------------------------------------------------------
84 // event tables and other macros for wxWindows
85 // ----------------------------------------------------------------------------
86
87 // the event tables connect the wxWindows events with the functions (event
88 // handlers) which process them. It can be also done at run-time, but for the
89 // simple menu events like this the static method is much simpler.
90 wxBEGIN_EVENT_TABLE(MyFrame, wxFrame)
91 EVT_MENU(Minimal_Quit, MyFrame::OnQuit)
92 EVT_MENU(Minimal_About, MyFrame::OnAbout)
93 wxEND_EVENT_TABLE()
94
95 // Create a new application object: this macro will allow wxWidgets to create
96 // the application object during program execution (it's better than using a
97 // static object for many reasons) and also implements the accessor function
98 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
99 // not wxApp)
100 wxIMPLEMENT_APP(MyApp);
101
102 // ============================================================================
103 // implementation
104 // ============================================================================
105
106 // ----------------------------------------------------------------------------
107 // the application class
108 // ----------------------------------------------------------------------------
109
110 // 'Main program' equivalent: the program execution "starts" here
OnInit()111 bool MyApp::OnInit()
112 {
113 // create the main application window
114 MyFrame *frame = new MyFrame(wxT("Minimal wxWidgets App"));
115
116 // and show it (the frames, unlike simple controls, are not shown when
117 // created initially)
118 frame->Show(true);
119
120 // success: wxApp::OnRun() will be called which will enter the main message
121 // loop and the application will run. If we returned false here, the
122 // application would exit immediately.
123 return true;
124 }
125
126 // ----------------------------------------------------------------------------
127 // main frame
128 // ----------------------------------------------------------------------------
129
130 // frame constructor
MyFrame(const wxString & title)131 MyFrame::MyFrame(const wxString& title)
132 : wxFrame(NULL, wxID_ANY, title)
133 {
134 // set the frame icon
135
136 #if wxUSE_MENUS
137 // create a menu bar
138 wxMenu *menuFile = new wxMenu;
139
140 // the "About" item should be in the help menu
141 wxMenu *helpMenu = new wxMenu;
142 helpMenu->Append(Minimal_About, wxT("&About\tF1"), wxT("Show about dialog"));
143
144 menuFile->Append(Minimal_Quit, wxT("E&xit\tAlt-X"), wxT("Quit this program"));
145
146 // now append the freshly created menu to the menu bar...
147 wxMenuBar *menuBar = new wxMenuBar();
148 menuBar->Append(menuFile, wxT("&File"));
149 menuBar->Append(helpMenu, wxT("&Help"));
150
151 // ... and attach this menu bar to the frame
152 SetMenuBar(menuBar);
153 #endif // wxUSE_MENUS
154
155 #if wxUSE_STATUSBAR
156 // create a status bar just for fun (by default with 1 pane only)
157 CreateStatusBar(2);
158 SetStatusText(wxT("Welcome to wxWidgets!"));
159 #endif // wxUSE_STATUSBAR
160 }
161
162
163 // event handlers
164
OnQuit(wxCommandEvent & WXUNUSED (event))165 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
166 {
167 // true is to force the frame to close
168 Close(true);
169 }
170
OnAbout(wxCommandEvent & WXUNUSED (event))171 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
172 {
173 wxString msg;
174 msg.Printf( wxT("This is the About dialog of the minimal sample.\n")
175 wxT("Welcome to %s"), wxVERSION_STRING);
176
177 wxMessageBox(msg, wxT("About Minimal"), wxOK | wxICON_INFORMATION, this);
178 }
179