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 need to set wxUSE_MFC to 1 in include/wx/msw/setup.h, which switches
  32 // off some debugging features and also removes the windows.h inclusion
  33 // in wxprec.h (MFC headers don't like this to have been included previously).
  34 // Set to 'Use MFC in a shared DLL' or add _AFXDLL to preprocessor settings.
  35 // Then recompile wxWidgets and this sample.
  36 //
  37 // (2) I can't get the sample to link and run using a static MFC library, only the DLL
  38 // version. Perhaps someone else is a wizard at working out the required settings
  39 // in the wxWin library and the sample; then debugging the assert problem may be
  40 // easier.
  41 //
  42 // (3) Compiling wxWidgets in DLL mode currently includes windows.h, so you must only
  43 // try linking wxWidgets statically.
  44
  45 // For compilers that support precompilation, includes "wx/wx.h".
  46 #include "wx/wxprec.h"
  47
  48 #ifdef __BORLANDC__
  49 #pragma hdrstop
  50 #endif
  51
  52 #include "wx/wx.h"
  53
  54 #if defined(_WINDOWS_) || !wxUSE_MFC
  55 #error "Sorry, you need to edit include/wx/msw/setup.h, set wxUSE_MFC to 1, and recompile the library."
  56 #endif
  57
  58 #ifdef new
  59 #undef new
  60 #endif
  61
  62 #include "stdafx.h"
  63
  64 #ifdef DrawText
  65 #undef DrawText
  66 #endif
  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 { public:
  84 bool OnInit(void);
  85 wxFrame *CreateFrame(void);
  86 };
  87
  88 class MyCanvas: public wxScrolledWindow
  89 {
  90 public:
  91     MyCanvas(wxWindow *parent, const wxPoint& pos, const wxSize& size);
  92     void OnPaint(wxPaintEvent& event);
  93     void OnMouseEvent(wxMouseEvent& event);
  94     DECLARE_EVENT_TABLE()
  95 };
  96
  97 class MyChild: public wxFrame
  98 {
  99 public:
 100     MyCanvas *canvas;
 101     MyChild(wxFrame *frame, const wxString& title, const wxPoint& pos, const wxSize& size, const long style);
 102     ~MyChild(void);
 103
 104     void OnQuit(wxCommandEvent& event);
 105     void OnNew(wxCommandEvent& event);
 106     void OnActivate(wxActivateEvent& event);
 107
 108     DECLARE_EVENT_TABLE()
 109 };
 110
 111 // For drawing lines in a canvas
 112 long xpos = -1;
 113 long ypos = -1;
 114
 115 // ID for the menu quit command
 116 #define HELLO_QUIT 1
 117 #define HELLO_NEW  2
 118
 119 DECLARE_APP(MyApp)
 120 IMPLEMENT_APP(MyApp)
 121
 122 /////////////////////////////////////////////////////////////////////////////
 123
 124 // CMainWindow constructor:
 125 // Create the window with the appropriate style, size, menu, etc.
 126 //
 127 CMainWindow::CMainWindow()
 128 {
 129     LoadAccelTable( "MainAccelTable" );
 130     Create( NULL, "Hello Foundation Application",
 131         WS_OVERLAPPEDWINDOW, rectDefault, NULL, "MainMenu" );
 132 }
 133
 134 // OnPaint:
 135 // This routine draws the string "Hello, Windows!" in the center of the
 136 // client area.  It is called whenever Windows sends a WM_PAINT message.
 137 // Note that creating a CPaintDC automatically does a BeginPaint and
 138 // an EndPaint call is done when it is destroyed at the end of this
 139 // function.  CPaintDC's constructor needs the window (this).
 140 //
 141 void CMainWindow::OnPaint()
 142 {
 143     CString s = "Hello, Windows!";
 144     CPaintDC dc( this );
 145     CRect rect;
 146
 147     GetClientRect( rect );
 148     dc.SetTextAlign( TA_BASELINE | TA_CENTER );
 149     dc.SetTextColor( ::GetSysColor( COLOR_WINDOWTEXT ) );
 150     dc.SetBkMode(TRANSPARENT);
 151     dc.TextOut( ( rect.right / 2 ), ( rect.bottom / 2 ),
 152         s, s.GetLength() );
 153 }
 154
 155 // OnAbout:
 156 // This member function is called when a WM_COMMAND message with an
 157 // IDM_ABOUT code is received by the CMainWindow class object.  The
 158 // message map below is responsible for this routing.
 159 //
 160 // We create a ClDialog object using the "AboutBox" resource (see
 161 // hello.rc), and invoke it.
 162 //
 163 void CMainWindow::OnAbout()
 164 {
 165     CDialog about( "AboutBox", this );
 166     about.DoModal();
 167 }
 168
 169 void CMainWindow::OnTest()
 170 {
 171     wxMessageBox("This is a wxWidgets message box.\nWe're about to create a new wxWidgets frame.", "wxWidgets", wxOK);
 172     wxGetApp().CreateFrame();
 173 }
 174
 175 // CMainWindow message map:
 176 // Associate messages with member functions.
 177 //
 178 // It is implied that the ON_WM_PAINT macro expects a member function
 179 // "void OnPaint()".
 180 //
 181 // It is implied that members connected with the ON_COMMAND macro
 182 // receive no arguments and are void of return type, e.g., "void OnAbout()".
 183 //
 184 BEGIN_MESSAGE_MAP( CMainWindow, CFrameWnd )
 185 //{{AFX_MSG_MAP( CMainWindow )
 186 ON_WM_PAINT()
 187 ON_COMMAND( IDM_ABOUT, OnAbout )
 188 ON_COMMAND( IDM_TEST, OnTest )
 189 //}}AFX_MSG_MAP
 190 END_MESSAGE_MAP()
 191
 192 /////////////////////////////////////////////////////////////////////////////
 193 // CTheApp
 194
 195 // InitInstance:
 196 // When any CTheApp object is created, this member function is automatically
 197 // called.  Any data may be set up at this point.
 198 //
 199 // Also, the main window of the application should be created and shown here.
 200 // Return TRUE if the initialization is successful.
 201 //
 202 BOOL CTheApp::InitInstance()
 203 {
 204     SetDialogBkColor();     // hook gray dialogs (was default in MFC V1)
 205
 206     wxEntry((WXHINSTANCE) m_hInstance, (WXHINSTANCE) m_hPrevInstance, m_lpCmdLine, m_nCmdShow, FALSE);
 207
 208 #if START_WITH_MFC_WINDOW
 209     // Demonstrate creation of an initial MFC main window.
 210     m_pMainWnd = new CMainWindow();
 211     m_pMainWnd->ShowWindow( m_nCmdShow );
 212     m_pMainWnd->UpdateWindow();
 213 #else
 214     // Demonstrate creation of an initial wxWidgets main window.
 215     // Wrap wxWidgets window in a dummy MFC window and
 216     // make the main window.
 217     if (wxTheApp && wxTheApp->GetTopWindow())
 218     {
 219         m_pMainWnd = new CDummyWindow((HWND) wxTheApp->GetTopWindow()->GetHWND());
 220     }
 221 #endif
 222
 223     return TRUE;
 224 }
 225
 226 int CTheApp::ExitInstance()
 227 {
 228     // OnExit isn't called by CleanUp so must be called explicitly.
 229     wxTheApp->OnExit();
 230     wxApp::CleanUp();
 231
 232     return CWinApp::ExitInstance();
 233 }
 234
 235 // Override this to provide wxWidgets message loop
 236 // compatibility
 237
 238 BOOL CTheApp::PreTranslateMessage(MSG *msg)
 239 {
 240     if (wxTheApp && wxTheApp->ProcessMessage((WXMSG*) msg))
 241         return TRUE;
 242     else
 243         return CWinApp::PreTranslateMessage(msg);
 244 }
 245
 246 BOOL CTheApp::OnIdle(LONG lCount)
 247 {
 248     if (wxTheApp)
 249         return wxTheApp->ProcessIdle();
 250     else
 251         return FALSE;
 252 }
 253
 254 /*********************************************************************
 255 * wxWidgets elements
 256 ********************************************************************/
 257
 258 bool MyApp::OnInit(void)
 259 {
 260 #if !START_WITH_MFC_WINDOW
 261
 262     // Exit app when the top level frame is deleted
 263     SetExitOnFrameDelete(TRUE);
 264
 265     (void) CreateFrame();
 266 #endif
 267
 268     return TRUE;
 269 }
 270
 271 wxFrame *MyApp::CreateFrame(void)
 272 {
 273     MyChild *subframe = new MyChild(NULL, "Canvas Frame", wxPoint(10, 10), wxSize(300, 300),
 274         wxDEFAULT_FRAME_STYLE);
 275
 276     subframe->SetTitle("wxWidgets canvas frame");
 277
 278     // Give it a status line
 279     subframe->CreateStatusBar();
 280
 281     // Make a menubar
 282     wxMenu *file_menu = new wxMenu;
 283
 284     file_menu->Append(HELLO_NEW, "&New MFC Window");
 285     file_menu->Append(HELLO_QUIT, "&Close");
 286
 287     wxMenuBar *menu_bar = new wxMenuBar;
 288
 289     menu_bar->Append(file_menu, "&File");
 290
 291     // Associate the menu bar with the frame
 292     subframe->SetMenuBar(menu_bar);
 293
 294     int width, height;
 295     subframe->GetClientSize(&width, &height);
 296
 297     MyCanvas *canvas = new MyCanvas(subframe, wxPoint(0, 0), wxSize(width, height));
 298     canvas->SetCursor(wxCursor(wxCURSOR_PENCIL));
 299     subframe->canvas = canvas;
 300     subframe->Show(TRUE);
 301
 302     // Return the main frame window
 303     return subframe;
 304 }
 305
 306 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 307     EVT_PAINT(MyCanvas::OnPaint)
 308     EVT_MOUSE_EVENTS(MyCanvas::OnMouseEvent)
 309 END_EVENT_TABLE()
 310
 311 // Define a constructor for my canvas
 312 MyCanvas::MyCanvas(wxWindow *parent, const wxPoint& pos, const wxSize& size):
 313 wxScrolledWindow(parent, -1, pos, size)
 314 {
 315 }
 316
 317 // Define the repainting behaviour
 318 void MyCanvas::OnPaint(wxPaintEvent& event)
 319 {
 320     wxPaintDC dc(this);
 321
 322     dc.SetFont(* wxSWISS_FONT);
 323     dc.SetPen(* wxGREEN_PEN);
 324     dc.DrawLine(0, 0, 200, 200);
 325     dc.DrawLine(200, 0, 0, 200);
 326
 327     dc.SetBrush(* wxCYAN_BRUSH);
 328     dc.SetPen(* wxRED_PEN);
 329     dc.DrawRectangle(100, 100, 100, 50);
 330     dc.DrawRoundedRectangle(150, 150, 100, 50, 20);
 331
 332     dc.DrawEllipse(250, 250, 100, 50);
 333     dc.DrawSpline(50, 200, 50, 100, 200, 10);
 334     dc.DrawLine(50, 230, 200, 230);
 335     dc.DrawText("This is a test string", 50, 230);
 336 }
 337
 338 // This implements a tiny doodling program! Drag the mouse using
 339 // the left button.
 340 void MyCanvas::OnMouseEvent(wxMouseEvent& event)
 341 {
 342     wxClientDC dc(this);
 343     dc.SetPen(* wxBLACK_PEN);
 344     wxPoint pos = event.GetPosition();
 345     if (xpos > -1 && ypos > -1 && event.Dragging())
 346     {
 347         dc.DrawLine(xpos, ypos, pos.x, pos.y);
 348     }
 349     xpos = pos.x;
 350     ypos = pos.y;
 351 }
 352
 353 BEGIN_EVENT_TABLE(MyChild, wxFrame)
 354     EVT_MENU(HELLO_QUIT, MyChild::OnQuit)
 355     EVT_MENU(HELLO_NEW, MyChild::OnNew)
 356     EVT_ACTIVATE(MyChild::OnActivate)
 357 END_EVENT_TABLE()
 358
 359 MyChild::MyChild(wxFrame *frame, const wxString& title, const wxPoint& pos, const wxSize& size, const long style):
 360 wxFrame(frame, -1, title, pos, size, style)
 361 {
 362     canvas = NULL;
 363 }
 364
 365 MyChild::~MyChild(void)
 366 {
 367 }
 368
 369 void MyChild::OnQuit(wxCommandEvent& event)
 370 {
 371     Close(TRUE);
 372 }
 373
 374 void MyChild::OnNew(wxCommandEvent& event)
 375 {
 376     CMainWindow *mainWin = new CMainWindow();
 377     mainWin->ShowWindow( TRUE );
 378     mainWin->UpdateWindow();
 379 }
 380
 381 void MyChild::OnActivate(wxActivateEvent& event)
 382 {
 383     if (event.GetActive() && canvas)
 384         canvas->SetFocus();
 385 }
 386
 387 // Dummy MFC window for specifying a valid main window to MFC, using
 388 // a wxWidgets HWND.
 389 CDummyWindow::CDummyWindow(HWND hWnd):CWnd()
 390 {
 391     Attach(hWnd);
 392 }
 393
 394 // Don't let the CWnd destructor delete the HWND
 395 CDummyWindow::~CDummyWindow(void)
 396 {
 397     Detach();
 398 }
 399