acf53800fc
Allow reusing this functionality from outside the library, it can he useful if an MFC window needs to be embedded into a wx application (or vice versa). Also use a better wxEntryStart() overload as a side effect, this should, in particular, fix the problem with command line arguments processing in mixed MFC/wx applications pointed out in a comment in the sample previously.
138 lines
3.7 KiB
C++
138 lines
3.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/msw/mfc.h
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// Purpose: Helpers for applications using both wxWidgets and MFC
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// Author: Julian Smart, Vadim Zeitlin
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// Created: 2017-12-01 (mostly extracted from samples/mfc)
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// Copyright: (c) 2017 Vadim Zeitlin <vadim@wxwidgets.org>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_MSW_MFC_H_
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#define _WX_MSW_MFC_H_
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#ifndef __AFXWIN_H__
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#error "MFC headers must be included before including this file."
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#endif
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#include "wx/app.h"
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#include "wx/evtloop.h"
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#include "wx/window.h"
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#include "wx/msw/winundef.h"
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// ----------------------------------------------------------------------------
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// MFC window class wrapping a window created by wxWidgets
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// ----------------------------------------------------------------------------
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class wxMFCWnd : public CWnd
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{
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public:
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explicit wxMFCWnd(wxWindow* w)
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{
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Attach(w->GetHWND());
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}
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~wxMFCWnd()
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{
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// Prevent MFC from destroying the wxWindow.
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Detach();
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}
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};
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// ----------------------------------------------------------------------------
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// MFC application class forwarding everything to wxApp
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// ----------------------------------------------------------------------------
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class wxMFCWinApp : public CWinApp
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{
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public:
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BOOL InitInstance() wxOVERRIDE
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{
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if ( !CWinApp::InitInstance() )
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return FALSE;
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if ( !wxEntryStart(m_hInstance) )
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return FALSE;
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if ( !wxTheApp || !wxTheApp->CallOnInit() )
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return FALSE;
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if ( !InitMainWnd() )
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return FALSE;
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return TRUE;
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}
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int ExitInstance() wxOVERRIDE
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{
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delete m_pMainWnd;
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if ( wxTheApp )
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wxTheApp->OnExit();
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wxEntryCleanup();
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return CWinApp::ExitInstance();
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}
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// Override this to provide wxWidgets message loop compatibility
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BOOL PreTranslateMessage(MSG *msg) wxOVERRIDE
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{
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wxEventLoop * const
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evtLoop = static_cast<wxEventLoop *>(wxEventLoop::GetActive());
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if ( evtLoop && evtLoop->PreProcessMessage(msg) )
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return TRUE;
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return CWinApp::PreTranslateMessage(msg);
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}
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BOOL OnIdle(LONG lCount) wxOVERRIDE
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{
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BOOL moreIdle = CWinApp::OnIdle(lCount);
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if ( wxTheApp && wxTheApp->ProcessIdle() )
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moreIdle = TRUE;
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return moreIdle;
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}
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protected:
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// This virtual method can be overridden to create the main window using
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// MFC code. The default implementation relies on wxApp::OnInit() creating
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// a top level window which is then wrapped in an MFC window and used as
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// the main window.
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virtual BOOL InitMainWnd()
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{
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wxWindow* const w = wxTheApp->GetTopWindow();
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if ( !w )
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return FALSE;
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// We need to initialize the main window to let the program continue
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// running.
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m_pMainWnd = new wxMFCWnd(w);
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// And we need to let wxWidgets know that it should exit the
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// application when this window is closed, as OnRun(), which does this
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// by default, won't be called when using MFC main message loop.
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wxTheApp->SetExitOnFrameDelete(true);
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return TRUE;
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}
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};
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// ----------------------------------------------------------------------------
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// wxWidgets application class to be used in MFC applications
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// ----------------------------------------------------------------------------
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class wxAppWithMFC : public wxApp
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{
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public:
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void ExitMainLoop() wxOVERRIDE
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{
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// There is no wxEventLoop to exit, tell MFC to stop pumping messages
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// instead.
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::PostQuitMessage(0);
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}
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};
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#endif // _WX_MSW_MFC_H_
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