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 will get
  42 //     link errors for symbols such as __mbctype, __argc, and __argv
  43
  44 #include "stdafx.h"
  45
  46 // For compilers that support precompilation, includes "wx/wx.h".
  47 #include "wx/wxprec.h"
  48
  49 #ifdef __BORLANDC__
  50 #pragma hdrstop
  51 #endif
  52
  53 #ifndef WX_PRECOMP
  54     #include "wx/wx.h"
  55 #endif
  56
  57 #include "wx/evtloop.h"
  58
  59 #include "resource.h"
  60
  61 #include "mfctest.h"
  62
  63 /////////////////////////////////////////////////////////////////////////////
  64
  65 // theApp:
  66 // Just creating this application object runs the whole application.
  67 //
  68 CTheApp theApp;
  69
  70 // wxWidgets elements
  71
  72 // Define a new application type
  73 class MyApp: public wxApp
  74 {
  75 public:
  76     virtual bool OnInit();
  77
  78     wxFrame *CreateFrame();
  79 };
  80
  81 class MyCanvas: public wxScrolledWindow
  82 {
  83 public:
  84     MyCanvas(wxWindow *parent, const wxPoint& pos, const wxSize& size);
  85     void OnPaint(wxPaintEvent& event);
  86     void OnMouseEvent(wxMouseEvent& event);
  87     DECLARE_EVENT_TABLE()
  88 };
  89
  90 class MyChild: public wxFrame
  91 {
  92 public:
  93     MyChild(wxFrame *frame, const wxString& title, const wxPoint& pos, const wxSize& size, const long style);
  94     virtual ~MyChild();
  95
  96     void OnQuit(wxCommandEvent& event);
  97     void OnNew(wxCommandEvent& event);
  98     void OnActivate(wxActivateEvent& event);
  99
 100     MyCanvas *canvas;
 101
 102     DECLARE_EVENT_TABLE()
 103 };
 104
 105 // ID for the menu quit command
 106 #define HELLO_QUIT 1
 107 #define HELLO_NEW  2
 108
 109 DECLARE_APP(MyApp)
 110
 111 // notice use of IMPLEMENT_APP_NO_MAIN() instead of the usual IMPLEMENT_APP!
 112 IMPLEMENT_APP_NO_MAIN(MyApp)
 113
 114 CMainWindow::CMainWindow()
 115 {
 116     LoadAccelTable( "MainAccelTable" );
 117     Create( NULL, "Hello Foundation Application",
 118         WS_OVERLAPPEDWINDOW, rectDefault, NULL, "MainMenu" );
 119 }
 120
 121 void CMainWindow::OnPaint()
 122 {
 123     CString s = "Hello, Windows!";
 124     CPaintDC dc( this );
 125     CRect rect;
 126
 127     GetClientRect( rect );
 128     dc.SetTextAlign( TA_BASELINE | TA_CENTER );
 129     dc.SetTextColor( ::GetSysColor( COLOR_WINDOWTEXT ) );
 130     dc.SetBkMode(TRANSPARENT);
 131     dc.TextOut( ( rect.right / 2 ), ( rect.bottom / 2 ),
 132         s, s.GetLength() );
 133 }
 134
 135 void CMainWindow::OnAbout()
 136 {
 137     CDialog about( "AboutBox", this );
 138     about.DoModal();
 139 }
 140
 141 void CMainWindow::OnTest()
 142 {
 143     wxMessageBox("This is a wxWidgets message box.\nWe're about to create a new wxWidgets frame.", "wxWidgets", wxOK);
 144     wxGetApp().CreateFrame();
 145 }
 146
 147 // CMainWindow message map:
 148 // Associate messages with member functions.
 149 //
 150 // It is implied that the ON_WM_PAINT macro expects a member function
 151 // "void OnPaint()".
 152 //
 153 // It is implied that members connected with the ON_COMMAND macro
 154 // receive no arguments and are void of return type, e.g., "void OnAbout()".
 155 //
 156 BEGIN_MESSAGE_MAP( CMainWindow, CFrameWnd )
 157 //{{AFX_MSG_MAP( CMainWindow )
 158 ON_WM_PAINT()
 159 ON_COMMAND( IDM_ABOUT, OnAbout )
 160 ON_COMMAND( IDM_TEST, OnTest )
 161 //}}AFX_MSG_MAP
 162 END_MESSAGE_MAP()
 163
 164 BOOL CTheApp::InitInstance()
 165 {
 166     if ( !CWinApp::InitInstance() )
 167         return FALSE;
 168
 169     // TODO: cmd line parsing
 170     WXDLLIMPEXP_BASE void wxSetInstance(HINSTANCE hInst);
 171     wxSetInstance(m_hInstance);
 172     wxApp::m_nCmdShow = m_nCmdShow;
 173     int argc = 0;
 174     char **argv = NULL;
 175     wxEntryStart(argc, argv);
 176     if ( !wxTheApp || !wxTheApp->CallOnInit() )
 177         return FALSE;
 178
 179 #if START_WITH_MFC_WINDOW
 180     // Demonstrate creation of an initial MFC main window.
 181     m_pMainWnd = new CMainWindow();
 182     m_pMainWnd->ShowWindow( m_nCmdShow );
 183     m_pMainWnd->UpdateWindow();
 184 #else
 185     // Demonstrate creation of an initial wxWidgets main window.
 186     // Wrap wxWidgets window in a dummy MFC window and
 187     // make the main window.
 188     if (wxTheApp && wxTheApp->GetTopWindow())
 189     {
 190         m_pMainWnd = new CDummyWindow((HWND) wxTheApp->GetTopWindow()->GetHWND());
 191     }
 192 #endif
 193
 194     return TRUE;
 195 }
 196
 197 int CTheApp::ExitInstance()
 198 {
 199 #if !START_WITH_MFC_WINDOW
 200     delete m_pMainWnd;
 201 #endif
 202
 203     if ( wxTheApp )
 204         wxTheApp->OnExit();
 205     wxEntryCleanup();
 206
 207     return CWinApp::ExitInstance();
 208 }
 209
 210 // Override this to provide wxWidgets message loop compatibility
 211 BOOL CTheApp::PreTranslateMessage(MSG *msg)
 212 {
 213     wxEventLoop *evtLoop = wxEventLoop::GetActive();
 214     if ( evtLoop && evtLoop->PreProcessMessage(msg) )
 215         return TRUE;
 216
 217     return CWinApp::PreTranslateMessage(msg);
 218 }
 219
 220 BOOL CTheApp::OnIdle(LONG WXUNUSED(lCount))
 221 {
 222     return wxTheApp && wxTheApp->ProcessIdle();
 223 }
 224
 225 /*********************************************************************
 226 * wxWidgets elements
 227 ********************************************************************/
 228
 229 bool MyApp::OnInit()
 230 {
 231 #if !START_WITH_MFC_WINDOW
 232
 233     // Exit app when the top level frame is deleted
 234     SetExitOnFrameDelete(TRUE);
 235
 236     (void) CreateFrame();
 237 #endif
 238
 239     return TRUE;
 240 }
 241
 242 wxFrame *MyApp::CreateFrame()
 243 {
 244     MyChild *subframe = new MyChild(NULL, "Canvas Frame", wxPoint(10, 10), wxSize(300, 300),
 245         wxDEFAULT_FRAME_STYLE);
 246
 247     subframe->SetTitle("wxWidgets canvas frame");
 248
 249     // Give it a status line
 250     subframe->CreateStatusBar();
 251
 252     // Make a menubar
 253     wxMenu *file_menu = new wxMenu;
 254
 255     file_menu->Append(HELLO_NEW, "&New MFC Window");
 256     file_menu->Append(HELLO_QUIT, "&Close");
 257
 258     wxMenuBar *menu_bar = new wxMenuBar;
 259
 260     menu_bar->Append(file_menu, "&File");
 261
 262     // Associate the menu bar with the frame
 263     subframe->SetMenuBar(menu_bar);
 264
 265     int width, height;
 266     subframe->GetClientSize(&width, &height);
 267
 268     MyCanvas *canvas = new MyCanvas(subframe, wxPoint(0, 0), wxSize(width, height));
 269     canvas->SetCursor(wxCursor(wxCURSOR_PENCIL));
 270     subframe->canvas = canvas;
 271     subframe->Show(TRUE);
 272
 273     // Return the main frame window
 274     return subframe;
 275 }
 276
 277 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 278     EVT_PAINT(MyCanvas::OnPaint)
 279     EVT_MOUSE_EVENTS(MyCanvas::OnMouseEvent)
 280 END_EVENT_TABLE()
 281
 282 // Define a constructor for my canvas
 283 MyCanvas::MyCanvas(wxWindow *parent, const wxPoint& pos, const wxSize& size)
 284         : wxScrolledWindow(parent, -1, pos, size)
 285 {
 286 }
 287
 288 // Define the repainting behaviour
 289 void MyCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))
 290 {
 291     wxPaintDC dc(this);
 292
 293     dc.SetFont(* wxSWISS_FONT);
 294     dc.SetPen(* wxGREEN_PEN);
 295     dc.DrawLine(0, 0, 200, 200);
 296     dc.DrawLine(200, 0, 0, 200);
 297
 298     dc.SetBrush(* wxCYAN_BRUSH);
 299     dc.SetPen(* wxRED_PEN);
 300     dc.DrawRectangle(100, 100, 100, 50);
 301     dc.DrawRoundedRectangle(150, 150, 100, 50, 20);
 302
 303     dc.DrawEllipse(250, 250, 100, 50);
 304     dc.DrawLine(50, 230, 200, 230);
 305     dc.DrawText("This is a test string", 50, 230);
 306 }
 307
 308 // This implements a tiny doodling program! Drag the mouse using
 309 // the left button.
 310 void MyCanvas::OnMouseEvent(wxMouseEvent& event)
 311 {
 312     static long s_xpos = -1;
 313     static long s_ypos = -1;
 314
 315     wxClientDC dc(this);
 316     dc.SetPen(* wxBLACK_PEN);
 317     wxPoint pos = event.GetPosition();
 318     if (s_xpos > -1 && s_ypos > -1 && event.Dragging())
 319     {
 320         dc.DrawLine(s_xpos, s_ypos, pos.x, pos.y);
 321     }
 322
 323     s_xpos = pos.x;
 324     s_ypos = pos.y;
 325 }
 326
 327 BEGIN_EVENT_TABLE(MyChild, wxFrame)
 328     EVT_MENU(HELLO_QUIT, MyChild::OnQuit)
 329     EVT_MENU(HELLO_NEW, MyChild::OnNew)
 330     EVT_ACTIVATE(MyChild::OnActivate)
 331 END_EVENT_TABLE()
 332
 333 MyChild::MyChild(wxFrame *frame, const wxString& title, const wxPoint& pos, const wxSize& size, const long style)
 334        : wxFrame(frame, -1, title, pos, size, style)
 335 {
 336     canvas = NULL;
 337 }
 338
 339 MyChild::~MyChild()
 340 {
 341     if ( IsLastBeforeExit() )
 342         PostQuitMessage(0);
 343 }
 344
 345 void MyChild::OnQuit(wxCommandEvent& WXUNUSED(event))
 346 {
 347     Close(TRUE);
 348 }
 349
 350 void MyChild::OnNew(wxCommandEvent& WXUNUSED(event))
 351 {
 352     CMainWindow *mainWin = new CMainWindow();
 353     mainWin->ShowWindow( TRUE );
 354     mainWin->UpdateWindow();
 355 }
 356
 357 void MyChild::OnActivate(wxActivateEvent& event)
 358 {
 359     if (event.GetActive() && canvas)
 360         canvas->SetFocus();
 361 }
 362
 363 // Dummy MFC window for specifying a valid main window to MFC, using
 364 // a wxWidgets HWND.
 365 CDummyWindow::CDummyWindow(HWND hWnd)
 366 {
 367     Attach(hWnd);
 368 }
 369
 370 // Don't let the CWnd destructor delete the HWND
 371 CDummyWindow::~CDummyWindow()
 372 {
 373     Detach();
 374 }
 375