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 #ifdef _UNICODE
 128 // In Unicode build MFC normally requires to manually change the entry point to
 129 // wWinMainCRTStartup() but to avoid having to modify the project options to do
 130 // it we provide an adapter for it.
 131 extern "C" int wWinMainCRTStartup();
 132
 133 int WINAPI WinMain(HINSTANCE, HINSTANCE, char *, int)
 134 {
 135     wWinMainCRTStartup();
 136 }
 137 #endif // _UNICODE
 138
 139 CMainWindow::CMainWindow()
 140 {
 141     LoadAccelTable( wxT("MainAccelTable") );
 142     Create( NULL, wxT("Hello Foundation Application"),
 143         WS_OVERLAPPEDWINDOW, rectDefault, NULL, wxT("MainMenu") );
 144 }
 145
 146 void CMainWindow::OnPaint()
 147 {
 148     CString s = wxT("Hello, Windows!");
 149     CPaintDC dc( this );
 150     CRect rect;
 151
 152     GetClientRect( rect );
 153     dc.SetTextAlign( TA_BASELINE | TA_CENTER );
 154     dc.SetTextColor( ::GetSysColor( COLOR_WINDOWTEXT ) );
 155     dc.SetBkMode(TRANSPARENT);
 156     dc.TextOut( ( rect.right / 2 ), ( rect.bottom / 2 ),
 157         s, s.GetLength() );
 158 }
 159
 160 void CMainWindow::OnAbout()
 161 {
 162     CDialog about( wxT("AboutBox"), this );
 163     about.DoModal();
 164 }
 165
 166 void CMainWindow::OnTest()
 167 {
 168     wxMessageBox(wxT("This is a wxWidgets message box.\nWe're about to create a new wxWidgets frame."), wxT("wxWidgets"), wxOK);
 169     wxGetApp().CreateFrame();
 170 }
 171
 172 // CMainWindow message map:
 173 // Associate messages with member functions.
 174 //
 175 // It is implied that the ON_WM_PAINT macro expects a member function
 176 // "void OnPaint()".
 177 //
 178 // It is implied that members connected with the ON_COMMAND macro
 179 // receive no arguments and are void of return type, e.g., "void OnAbout()".
 180 //
 181 BEGIN_MESSAGE_MAP( CMainWindow, CFrameWnd )
 182 //{{AFX_MSG_MAP( CMainWindow )
 183 ON_WM_PAINT()
 184 ON_COMMAND( IDM_ABOUT, OnAbout )
 185 ON_COMMAND( IDM_TEST, OnTest )
 186 //}}AFX_MSG_MAP
 187 END_MESSAGE_MAP()
 188
 189 BOOL CTheApp::InitInstance()
 190 {
 191     if ( !CWinApp::InitInstance() )
 192         return FALSE;
 193
 194     // TODO: cmd line parsing
 195     WXDLLIMPEXP_BASE void wxSetInstance(HINSTANCE hInst);
 196     wxSetInstance(m_hInstance);
 197     wxApp::m_nCmdShow = m_nCmdShow;
 198     int argc = 0;
 199     wxChar **argv = NULL;
 200     wxEntryStart(argc, argv);
 201     if ( !wxTheApp || !wxTheApp->CallOnInit() )
 202         return FALSE;
 203
 204 #if START_WITH_MFC_WINDOW
 205     // Demonstrate creation of an initial MFC main window.
 206     m_pMainWnd = new CMainWindow();
 207     m_pMainWnd->ShowWindow( m_nCmdShow );
 208     m_pMainWnd->UpdateWindow();
 209 #else
 210     // Demonstrate creation of an initial wxWidgets main window.
 211     // Wrap wxWidgets window in a dummy MFC window and
 212     // make the main window.
 213     if (wxTheApp && wxTheApp->GetTopWindow())
 214     {
 215         m_pMainWnd = new CDummyWindow((HWND) wxTheApp->GetTopWindow()->GetHWND());
 216     }
 217 #endif
 218
 219     return TRUE;
 220 }
 221
 222 int CTheApp::ExitInstance()
 223 {
 224 #if !START_WITH_MFC_WINDOW
 225     delete m_pMainWnd;
 226 #endif
 227
 228     if ( wxTheApp )
 229         wxTheApp->OnExit();
 230     wxEntryCleanup();
 231
 232     return CWinApp::ExitInstance();
 233 }
 234
 235 // Override this to provide wxWidgets message loop compatibility
 236 BOOL CTheApp::PreTranslateMessage(MSG *msg)
 237 {
 238     wxEventLoop * const
 239         evtLoop = static_cast<wxEventLoop *>(wxEventLoop::GetActive());
 240     if ( evtLoop && evtLoop->PreProcessMessage(msg) )
 241         return TRUE;
 242
 243     return CWinApp::PreTranslateMessage(msg);
 244 }
 245
 246 BOOL CTheApp::OnIdle(LONG WXUNUSED(lCount))
 247 {
 248     return wxTheApp && wxTheApp->ProcessIdle();
 249 }
 250
 251 /*********************************************************************
 252 * wxWidgets elements
 253 ********************************************************************/
 254
 255 bool MyApp::OnInit()
 256 {
 257     if ( !wxApp::OnInit() )
 258         return false;
 259
 260 #if !START_WITH_MFC_WINDOW
 261     // as we're not inside wxWidgets main loop, the default logic doesn't work
 262     // in our case and we need to do this explicitly
 263     SetExitOnFrameDelete(true);
 264
 265     (void) CreateFrame();
 266 #endif
 267
 268     return true;
 269 }
 270
 271 void MyApp::ExitMainLoop()
 272 {
 273     // instead of existing wxWidgets main loop, terminate the MFC one
 274     ::PostQuitMessage(0);
 275 }
 276
 277 wxFrame *MyApp::CreateFrame()
 278 {
 279     MyChild *subframe = new MyChild(NULL, wxT("Canvas Frame"), wxPoint(10, 10), wxSize(300, 300),
 280         wxDEFAULT_FRAME_STYLE);
 281
 282     subframe->SetTitle(wxT("wxWidgets canvas frame"));
 283
 284     // Give it a status line
 285     subframe->CreateStatusBar();
 286
 287     // Make a menubar
 288     wxMenu *file_menu = new wxMenu;
 289
 290     file_menu->Append(HELLO_NEW, wxT("&New MFC Window"));
 291     file_menu->Append(HELLO_QUIT, wxT("&Close"));
 292
 293     wxMenuBar *menu_bar = new wxMenuBar;
 294
 295     menu_bar->Append(file_menu, wxT("&File"));
 296
 297     // Associate the menu bar with the frame
 298     subframe->SetMenuBar(menu_bar);
 299
 300     int width, height;
 301     subframe->GetClientSize(&width, &height);
 302
 303     MyCanvas *canvas = new MyCanvas(subframe, wxPoint(0, 0), wxSize(width, height));
 304     canvas->SetCursor(wxCursor(wxCURSOR_PENCIL));
 305     subframe->canvas = canvas;
 306     subframe->Show(true);
 307
 308     // Return the main frame window
 309     return subframe;
 310 }
 311
 312 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 313     EVT_PAINT(MyCanvas::OnPaint)
 314     EVT_MOUSE_EVENTS(MyCanvas::OnMouseEvent)
 315 END_EVENT_TABLE()
 316
 317 // Define a constructor for my canvas
 318 MyCanvas::MyCanvas(wxWindow *parent, const wxPoint& pos, const wxSize& size)
 319         : wxScrolledWindow(parent, -1, pos, size)
 320 {
 321 }
 322
 323 // Define the repainting behaviour
 324 void MyCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))
 325 {
 326     wxPaintDC dc(this);
 327
 328     dc.SetFont(* wxSWISS_FONT);
 329     dc.SetPen(* wxGREEN_PEN);
 330     dc.DrawLine(0, 0, 200, 200);
 331     dc.DrawLine(200, 0, 0, 200);
 332
 333     dc.SetBrush(* wxCYAN_BRUSH);
 334     dc.SetPen(* wxRED_PEN);
 335     dc.DrawRectangle(100, 100, 100, 50);
 336     dc.DrawRoundedRectangle(150, 150, 100, 50, 20);
 337
 338     dc.DrawEllipse(250, 250, 100, 50);
 339     dc.DrawLine(50, 230, 200, 230);
 340     dc.DrawText(wxT("This is a test string"), 50, 230);
 341 }
 342
 343 // This implements a tiny doodling program! Drag the mouse using
 344 // the left button.
 345 void MyCanvas::OnMouseEvent(wxMouseEvent& event)
 346 {
 347     static long s_xpos = -1;
 348     static long s_ypos = -1;
 349
 350     wxClientDC dc(this);
 351     dc.SetPen(* wxBLACK_PEN);
 352     wxPoint pos = event.GetPosition();
 353     if (s_xpos > -1 && s_ypos > -1 && event.Dragging())
 354     {
 355         dc.DrawLine(s_xpos, s_ypos, pos.x, pos.y);
 356     }
 357
 358     s_xpos = pos.x;
 359     s_ypos = pos.y;
 360 }
 361
 362 BEGIN_EVENT_TABLE(MyChild, wxFrame)
 363     EVT_MENU(HELLO_QUIT, MyChild::OnQuit)
 364     EVT_MENU(HELLO_NEW, MyChild::OnNew)
 365     EVT_ACTIVATE(MyChild::OnActivate)
 366 END_EVENT_TABLE()
 367
 368 MyChild::MyChild(wxFrame *frame, const wxString& title, const wxPoint& pos, const wxSize& size, const long style)
 369        : wxFrame(frame, -1, title, pos, size, style)
 370 {
 371     canvas = NULL;
 372 }
 373
 374 MyChild::~MyChild()
 375 {
 376     if ( IsLastBeforeExit() )
 377         PostQuitMessage(0);
 378 }
 379
 380 void MyChild::OnQuit(wxCommandEvent& WXUNUSED(event))
 381 {
 382     Close(true);
 383 }
 384
 385 void MyChild::OnNew(wxCommandEvent& WXUNUSED(event))
 386 {
 387     CMainWindow *mainWin = new CMainWindow();
 388     mainWin->ShowWindow( TRUE );
 389     mainWin->UpdateWindow();
 390 }
 391
 392 void MyChild::OnActivate(wxActivateEvent& event)
 393 {
 394     if (event.GetActive() && canvas)
 395         canvas->SetFocus();
 396 }
 397
 398 // Dummy MFC window for specifying a valid main window to MFC, using
 399 // a wxWidgets HWND.
 400 CDummyWindow::CDummyWindow(HWND hWnd)
 401 {
 402     Attach(hWnd);
 403 }
 404
 405 // Don't let the CWnd destructor delete the HWND
 406 CDummyWindow::~CDummyWindow()
 407 {
 408     Detach();
 409 }
 410