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 #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 #if defined(__WXGTK__) || defined(__WXMOTIF__)
  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     void OnTest(wxCommandEvent& event);
  73
  74     void OnPaint(wxPaintEvent& 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_Test,
  92
  93     // controls start here (the numbers are, of course, arbitrary)
  94     Minimal_Text = 1000,
  95 };
  96
  97 // ----------------------------------------------------------------------------
  98 // event tables and other macros for wxWindows
  99 // ----------------------------------------------------------------------------
 100
 101 // the event tables connect the wxWindows events with the functions (event
 102 // handlers) which process them. It can be also done at run-time, but for the
 103 // simple menu events like this the static method is much simpler.
 104 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 105     EVT_MENU(Minimal_Quit,  MyFrame::OnQuit)
 106     EVT_MENU(Minimal_About, MyFrame::OnAbout)
 107
 108     EVT_MENU(Minimal_Test, MyFrame::OnTest)
 109
 110     EVT_PAINT(MyFrame::OnPaint)
 111 END_EVENT_TABLE()
 112
 113 // Create a new application object: this macro will allow wxWindows to create
 114 // the application object during program execution (it's better than using a
 115 // static object for many reasons) and also declares the accessor function
 116 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 117 // not wxApp)
 118 IMPLEMENT_APP(MyApp)
 119
 120 // ============================================================================
 121 // implementation
 122 // ============================================================================
 123
 124 // ----------------------------------------------------------------------------
 125 // the application class
 126 // ----------------------------------------------------------------------------
 127
 128 // `Main program' equivalent: the program execution "starts" here
 129 bool MyApp::OnInit()
 130 {
 131     // Create the main application window
 132     MyFrame *frame = new MyFrame("Minimal wxWindows App",
 133                                  wxPoint(50, 50), wxSize(450, 340));
 134
 135     // Show it and tell the application that it's our main window
 136     // @@@ what does it do exactly, in fact? is it necessary here?
 137     frame->Show(TRUE);
 138     SetTopWindow(frame);
 139
 140     // success: wxApp::OnRun() will be called which will enter the main message
 141     // loop and the application will run. If we returned FALSE here, the
 142     // application would exit immediately.
 143     return TRUE;
 144 }
 145
 146 // ----------------------------------------------------------------------------
 147 // main frame
 148 // ----------------------------------------------------------------------------
 149
 150 // frame constructor
 151 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 152        : wxFrame((wxFrame *)NULL, -1, title, pos, size)
 153 {
 154     // set the frame icon
 155     SetIcon(wxICON(mondrian));
 156
 157     // create a menu bar
 158 //    wxMenu *menuFile = new wxMenu;
 159     wxMenu *menuFile = new wxMenu(wxMENU_TEAROFF);
 160
 161     menuFile->Append(Minimal_About, "&About...\tCtrl-A", "Show about dialog");
 162     menuFile->Append(Minimal_Test, "&Test...\tCtrl-T", "Test");
 163     menuFile->AppendSeparator();
 164     menuFile->Append(Minimal_Quit, "E&xit\tAlt-X", "Quit this program");
 165
 166     // now append the freshly created menu to the menu bar...
 167     wxMenuBar *menuBar = new wxMenuBar();
 168     menuBar->Append(menuFile, "&File");
 169
 170     // ... and attach this menu bar to the frame
 171     SetMenuBar(menuBar);
 172
 173 #if wxUSE_STATUSBAR
 174     // create a status bar just for fun (by default with 1 pane only)
 175     CreateStatusBar(2);
 176     SetStatusText("Welcome to wxWindows!");
 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     wxString msg;
 192     msg.Printf( _T("This is the about dialog of minimal sample.\n")
 193                 _T("Welcome to %s")
 194 #ifdef wxBETA_NUMBER
 195                _T(" (beta %d)!")
 196 #endif // wxBETA_NUMBER
 197                , wxVERSION_STRING
 198 #ifdef wxBETA_NUMBER
 199                , wxBETA_NUMBER
 200 #endif // wxBETA_NUMBER
 201               );
 202
 203     wxMessageBox(msg, "About Minimal", wxOK | wxICON_INFORMATION, this);
 204 }
 205
 206 struct Foo
 207 {
 208     Foo(int n_) { n = n_; }
 209
 210     int n;
 211 };
 212
 213 WX_DECLARE_LIST(Foo, FooList);
 214
 215 #include <wx/listimpl.cpp>
 216
 217 WX_DEFINE_LIST(FooList);
 218
 219 int FooSort(const Foo **item1, const Foo **item2)
 220 {
 221     return (*item2)->n - (*item1)->n;
 222 }
 223
 224 void ShowList(const FooList& list)
 225 {
 226     wxString msg, str;
 227     msg = "The list elements: (";
 228     for ( FooList::Node *node = list.GetFirst(); node; node = node->GetNext() )
 229     {
 230         if ( !!str )
 231             msg += ", ";
 232         str.Printf("%d", node->GetData()->n);
 233         msg += str;
 234     }
 235
 236     msg += ')';
 237
 238     wxMessageBox(msg, "List contents", wxOK | wxICON_INFORMATION);
 239 }
 240
 241 void MyFrame::OnTest(wxCommandEvent& event)
 242 {
 243     FooList list;
 244     list.Append(new Foo(12));
 245     list.Append(new Foo(3));
 246     list.Append(new Foo(1));
 247     list.Append(new Foo(7));
 248     list.Append(new Foo(4));
 249     ShowList(list);
 250     list.Sort(FooSort);
 251     ShowList(list);
 252 }
 253
 254 void MyFrame::OnPaint(wxPaintEvent& event)
 255 {
 256     wxPaintDC dc(this);
 257
 258     wxMemoryDC dcMem;
 259     wxSize size(GetClientSize());
 260     dcMem.SelectObject(wxBitmap(size.x, size.y, -1));
 261
 262     dcMem.SetBackground(wxBrush(wxColour(0, 0, 255), wxSOLID));
 263     dcMem.SetTextForeground(wxColour(0, 255, 0));
 264     dcMem.SetTextBackground(wxColour(0, 0, 0));
 265     dcMem.SetBackgroundMode(wxSOLID);
 266     dcMem.Clear();
 267     dcMem.DrawText("Hello, wxWindows!", 10, 10);
 268
 269     wxPoint ptOrig(0, 0);
 270     dc.Blit(ptOrig, size, &dcMem, ptOrig);
 271
 272     dcMem.SelectObject(wxNullBitmap);
 273 }