samples/mfc/mfctest.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        mfctest.cpp
   3 // Purpose:     Sample to demonstrate mixing MFC and wxWidgets code
   4 // Author:      Julian Smart
   5 // Id:          $Id$
   6 // Copyright:   (c) Julian Smart
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // This sample pops up an initial wxWidgets frame, with a menu item
  11 // that allows a new MFC window to be created. Note that CDummyWindow
  12 // is a class that allows a wxWidgets window to be seen as a CWnd
  13 // for the purposes of specifying a valid main window to the
  14 // MFC initialisation.
  15 //
  16 // You can easily modify this code so that an MFC window pops up
  17 // initially as the main frame, and allows wxWidgets frames to be
  18 // created subsequently.
  19 //
  20 // (1) Make MyApp::OnInit not create a main window.
  21 // (2) Make MFC's InitInstance create a main window, and remove
  22 //     creation of CDummyWindow.
  23 //
  24 // This can be accomplished by setting START_WITH_MFC_WINDOW to 1 below.
  25
  26 #define START_WITH_MFC_WINDOW 0
  27
  28 //
  29 // IMPORTANT NOTES:
  30 //
  31 // (1) You may need to set wxUSE_MFC to 1 in include/wx/msw/setup.h but
  32 //     normally this shouldn't be needed any longer, i.e. it works without
  33 //     it for me (VZ)
  34 //
  35 // (2) You should link with MFC DLL, not static libraries: or, to use static
  36 //     run-time libraries, use this command for both building wxWidgets and
  37 //     the sample:
  38 //
  39 //     nmake -f makefile.vc BUILD=debug SHARED=0 DEBUG_RUNTIME_LIBS=0 RUNTIME_LIBS=static all
  40 //
  41 //     Unless the run-time library settings match for wxWidgets and MFC, you
  42 //     will get link errors for symbols such as __mbctype, __argc, and __argv
  43 //
  44 // (3) If you see bogus memory leaks within the MSVC IDE on exit, in this
  45 //     sample or in your own project, you must be using __WXDEBUG__ +
  46 //     WXUSINGDLL + _AFXDLL
  47 //     Unfortunately this confuses the MSVC/MFC leak detector. To do away with
  48 //     these bogus memory leaks, add this to the list of link objects, make it
  49 //     first: mfc[version][u]d.lib
  50 //     -  [version] -> 42 or 70 or 80 etc
  51 //     -  u if using Unicode
  52
  53 #include "stdafx.h"
  54
  55 // For compilers that support precompilation, includes "wx/wx.h".
  56 #include "wx/wxprec.h"
  57
  58 #ifdef __BORLANDC__
  59 #pragma hdrstop
  60 #endif
  61
  62 #ifndef WX_PRECOMP
  63     #include "wx/wx.h"
  64 #endif
  65
  66 #include "wx/evtloop.h"
  67
  68 #include "resource.h"
  69
  70 #include "mfctest.h"
  71
  72 /////////////////////////////////////////////////////////////////////////////
  73
  74 // theApp:
  75 // Just creating this application object runs the whole application.
  76 //
  77 CTheApp theApp;
  78
  79 // wxWidgets elements
  80
  81 // Define a new application type
  82 class MyApp: public wxApp
  83 {
  84 public:
  85     virtual bool OnInit();
  86
  87     // we need to override this as the default behaviour only works when we're
  88     // running wxWidgets main loop, not MFC one
  89     virtual void ExitMainLoop();
  90
  91     wxFrame *CreateFrame();
  92 };
  93
  94 class MyCanvas: public wxScrolledWindow
  95 {
  96 public:
  97     MyCanvas(wxWindow *parent, const wxPoint& pos, const wxSize& size);
  98     void OnPaint(wxPaintEvent& event);
  99     void OnMouseEvent(wxMouseEvent& event);
 100     DECLARE_EVENT_TABLE()
 101 };
 102
 103 class MyChild: public wxFrame
 104 {
 105 public:
 106     MyChild(wxFrame *frame, const wxString& title, const wxPoint& pos, const wxSize& size, const long style);
 107     virtual ~MyChild();
 108
 109     void OnQuit(wxCommandEvent& event);
 110     void OnNew(wxCommandEvent& event);
 111     void OnActivate(wxActivateEvent& event);
 112
 113     MyCanvas *canvas;
 114
 115     DECLARE_EVENT_TABLE()
 116 };
 117
 118 // ID for the menu quit command
 119 #define HELLO_QUIT 1
 120 #define HELLO_NEW  2
 121
 122 DECLARE_APP(MyApp)
 123
 124 // notice use of IMPLEMENT_APP_NO_MAIN() instead of the usual IMPLEMENT_APP!
 125 IMPLEMENT_APP_NO_MAIN(MyApp)
 126
 127 CMainWindow::CMainWindow()
 128 {
 129     LoadAccelTable( _T("MainAccelTable") );
 130     Create( NULL, _T("Hello Foundation Application"),
 131         WS_OVERLAPPEDWINDOW, rectDefault, NULL, _T("MainMenu") );
 132 }
 133
 134 void CMainWindow::OnPaint()
 135 {
 136     CString s = _T("Hello, Windows!");
 137     CPaintDC dc( this );
 138     CRect rect;
 139
 140     GetClientRect( rect );
 141     dc.SetTextAlign( TA_BASELINE | TA_CENTER );
 142     dc.SetTextColor( ::GetSysColor( COLOR_WINDOWTEXT ) );
 143     dc.SetBkMode(TRANSPARENT);
 144     dc.TextOut( ( rect.right / 2 ), ( rect.bottom / 2 ),
 145         s, s.GetLength() );
 146 }
 147
 148 void CMainWindow::OnAbout()
 149 {
 150     CDialog about( _T("AboutBox"), this );
 151     about.DoModal();
 152 }
 153
 154 void CMainWindow::OnTest()
 155 {
 156     wxMessageBox(_T("This is a wxWidgets message box.\nWe're about to create a new wxWidgets frame."), _T("wxWidgets"), wxOK);
 157     wxGetApp().CreateFrame();
 158 }
 159
 160 // CMainWindow message map:
 161 // Associate messages with member functions.
 162 //
 163 // It is implied that the ON_WM_PAINT macro expects a member function
 164 // "void OnPaint()".
 165 //
 166 // It is implied that members connected with the ON_COMMAND macro
 167 // receive no arguments and are void of return type, e.g., "void OnAbout()".
 168 //
 169 BEGIN_MESSAGE_MAP( CMainWindow, CFrameWnd )
 170 //{{AFX_MSG_MAP( CMainWindow )
 171 ON_WM_PAINT()
 172 ON_COMMAND( IDM_ABOUT, OnAbout )
 173 ON_COMMAND( IDM_TEST, OnTest )
 174 //}}AFX_MSG_MAP
 175 END_MESSAGE_MAP()
 176
 177 BOOL CTheApp::InitInstance()
 178 {
 179     if ( !CWinApp::InitInstance() )
 180         return FALSE;
 181
 182     // TODO: cmd line parsing
 183     WXDLLIMPEXP_BASE void wxSetInstance(HINSTANCE hInst);
 184     wxSetInstance(m_hInstance);
 185     wxApp::m_nCmdShow = m_nCmdShow;
 186     int argc = 0;
 187     wxChar **argv = NULL;
 188     wxEntryStart(argc, argv);
 189     if ( !wxTheApp || !wxTheApp->CallOnInit() )
 190         return FALSE;
 191
 192 #if START_WITH_MFC_WINDOW
 193     // Demonstrate creation of an initial MFC main window.
 194     m_pMainWnd = new CMainWindow();
 195     m_pMainWnd->ShowWindow( m_nCmdShow );
 196     m_pMainWnd->UpdateWindow();
 197 #else
 198     // Demonstrate creation of an initial wxWidgets main window.
 199     // Wrap wxWidgets window in a dummy MFC window and
 200     // make the main window.
 201     if (wxTheApp && wxTheApp->GetTopWindow())
 202     {
 203         m_pMainWnd = new CDummyWindow((HWND) wxTheApp->GetTopWindow()->GetHWND());
 204     }
 205 #endif
 206
 207     return TRUE;
 208 }
 209
 210 int CTheApp::ExitInstance()
 211 {
 212 #if !START_WITH_MFC_WINDOW
 213     delete m_pMainWnd;
 214 #endif
 215
 216     if ( wxTheApp )
 217         wxTheApp->OnExit();
 218     wxEntryCleanup();
 219
 220     return CWinApp::ExitInstance();
 221 }
 222
 223 // Override this to provide wxWidgets message loop compatibility
 224 BOOL CTheApp::PreTranslateMessage(MSG *msg)
 225 {
 226     wxEventLoop * const
 227         evtLoop = wx_static_cast(wxEventLoop *, wxEventLoop::GetActive());
 228     if ( evtLoop && evtLoop->PreProcessMessage(msg) )
 229         return TRUE;
 230
 231     return CWinApp::PreTranslateMessage(msg);
 232 }
 233
 234 BOOL CTheApp::OnIdle(LONG WXUNUSED(lCount))
 235 {
 236     return wxTheApp && wxTheApp->ProcessIdle();
 237 }
 238
 239 /*********************************************************************
 240 * wxWidgets elements
 241 ********************************************************************/
 242
 243 bool MyApp::OnInit()
 244 {
 245     if ( !wxApp::OnInit() )
 246         return false;
 247
 248 #if !START_WITH_MFC_WINDOW
 249     // as we're not inside wxWidgets main loop, the default logic doesn't work
 250     // in our case and we need to do this explicitly
 251     SetExitOnFrameDelete(true);
 252
 253     (void) CreateFrame();
 254 #endif
 255
 256     return true;
 257 }
 258
 259 void MyApp::ExitMainLoop()
 260 {
 261     // instead of existing wxWidgets main loop, terminate the MFC one
 262     ::PostQuitMessage(0);
 263 }
 264
 265 wxFrame *MyApp::CreateFrame()
 266 {
 267     MyChild *subframe = new MyChild(NULL, _T("Canvas Frame"), wxPoint(10, 10), wxSize(300, 300),
 268         wxDEFAULT_FRAME_STYLE);
 269
 270     subframe->SetTitle(_T("wxWidgets canvas frame"));
 271
 272     // Give it a status line
 273     subframe->CreateStatusBar();
 274
 275     // Make a menubar
 276     wxMenu *file_menu = new wxMenu;
 277
 278     file_menu->Append(HELLO_NEW, _T("&New MFC Window"));
 279     file_menu->Append(HELLO_QUIT, _T("&Close"));
 280
 281     wxMenuBar *menu_bar = new wxMenuBar;
 282
 283     menu_bar->Append(file_menu, _T("&File"));
 284
 285     // Associate the menu bar with the frame
 286     subframe->SetMenuBar(menu_bar);
 287
 288     int width, height;
 289     subframe->GetClientSize(&width, &height);
 290
 291     MyCanvas *canvas = new MyCanvas(subframe, wxPoint(0, 0), wxSize(width, height));
 292     canvas->SetCursor(wxCursor(wxCURSOR_PENCIL));
 293     subframe->canvas = canvas;
 294     subframe->Show(true);
 295
 296     // Return the main frame window
 297     return subframe;
 298 }
 299
 300 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 301     EVT_PAINT(MyCanvas::OnPaint)
 302     EVT_MOUSE_EVENTS(MyCanvas::OnMouseEvent)
 303 END_EVENT_TABLE()
 304
 305 // Define a constructor for my canvas
 306 MyCanvas::MyCanvas(wxWindow *parent, const wxPoint& pos, const wxSize& size)
 307         : wxScrolledWindow(parent, -1, pos, size)
 308 {
 309 }
 310
 311 // Define the repainting behaviour
 312 void MyCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))
 313 {
 314     wxPaintDC dc(this);
 315
 316     dc.SetFont(* wxSWISS_FONT);
 317     dc.SetPen(* wxGREEN_PEN);
 318     dc.DrawLine(0, 0, 200, 200);
 319     dc.DrawLine(200, 0, 0, 200);
 320
 321     dc.SetBrush(* wxCYAN_BRUSH);
 322     dc.SetPen(* wxRED_PEN);
 323     dc.DrawRectangle(100, 100, 100, 50);
 324     dc.DrawRoundedRectangle(150, 150, 100, 50, 20);
 325
 326     dc.DrawEllipse(250, 250, 100, 50);
 327     dc.DrawLine(50, 230, 200, 230);
 328     dc.DrawText(_T("This is a test string"), 50, 230);
 329 }
 330
 331 // This implements a tiny doodling program! Drag the mouse using
 332 // the left button.
 333 void MyCanvas::OnMouseEvent(wxMouseEvent& event)
 334 {
 335     static long s_xpos = -1;
 336     static long s_ypos = -1;
 337
 338     wxClientDC dc(this);
 339     dc.SetPen(* wxBLACK_PEN);
 340     wxPoint pos = event.GetPosition();
 341     if (s_xpos > -1 && s_ypos > -1 && event.Dragging())
 342     {
 343         dc.DrawLine(s_xpos, s_ypos, pos.x, pos.y);
 344     }
 345
 346     s_xpos = pos.x;
 347     s_ypos = pos.y;
 348 }
 349
 350 BEGIN_EVENT_TABLE(MyChild, wxFrame)
 351     EVT_MENU(HELLO_QUIT, MyChild::OnQuit)
 352     EVT_MENU(HELLO_NEW, MyChild::OnNew)
 353     EVT_ACTIVATE(MyChild::OnActivate)
 354 END_EVENT_TABLE()
 355
 356 MyChild::MyChild(wxFrame *frame, const wxString& title, const wxPoint& pos, const wxSize& size, const long style)
 357        : wxFrame(frame, -1, title, pos, size, style)
 358 {
 359     canvas = NULL;
 360 }
 361
 362 MyChild::~MyChild()
 363 {
 364     if ( IsLastBeforeExit() )
 365         PostQuitMessage(0);
 366 }
 367
 368 void MyChild::OnQuit(wxCommandEvent& WXUNUSED(event))
 369 {
 370     Close(true);
 371 }
 372
 373 void MyChild::OnNew(wxCommandEvent& WXUNUSED(event))
 374 {
 375     CMainWindow *mainWin = new CMainWindow();
 376     mainWin->ShowWindow( TRUE );
 377     mainWin->UpdateWindow();
 378 }
 379
 380 void MyChild::OnActivate(wxActivateEvent& event)
 381 {
 382     if (event.GetActive() && canvas)
 383         canvas->SetFocus();
 384 }
 385
 386 // Dummy MFC window for specifying a valid main window to MFC, using
 387 // a wxWidgets HWND.
 388 CDummyWindow::CDummyWindow(HWND hWnd)
 389 {
 390     Attach(hWnd);
 391 }
 392
 393 // Don't let the CWnd destructor delete the HWND
 394 CDummyWindow::~CDummyWindow()
 395 {
 396     Detach();
 397 }
 398