MFC与wxWidgets比较

MFC and wxWidgets macros

MFC versionwxWidgets versionBEGIN_MESSAGE_MAPBEGIN_EVENT_TABLEEND_MESSAGE_MAPEND_EVENT_TABLEDECLARE_DYNAMICDECLARE_CLASSDECLARE_DYNCREATEDECLARE_DYMAMIC_CLASSIMPLEMENT_DYNAMICIMPLEMENT_CLASSIMPLEMENT_DYNCREATEIMPLEMENT_DYNAMIC_CLASSIsKindOf (RUNTIME_CLASS (CWindow))IsKindOf (CLASSINFO(wxWindow))

MFC and wxWidgets classes

Miscellaneous ClassesMFC versionwxWidgets versionCWinAppwxAppCObjectwxObjectCCmdTargetwxEvtHandlerCCommandLineInfowxCmdLineParserCMenuwxMenu ,wMenuBar ,wxMenuItemCWaitCursorwxBusyCursorCDataExchangewxValidatorWindow ClassesMFC versionwxWidgets versionCFrameWndwxFrameCMDIFrameWndwxMDIParentFrameCMDIChildWndwxMDIChildFrameCSplitterWndwxSplitterWindowCToolBarwxToolBarCStatusBarwxStatusBarCReBarwxCoolBar , but see contrib/src/fl andwxAUI ,wxDockItCPropertyPagewxPanelCPropertySheetwxNotebook ,wxPropertySheetDialogDialog ClassesMFC versionwxWidgets versionCDialogwxDialogCColorDialogwxColourDialogCFileDialogwxFileDialogCFindReplaceDialogwxFindReplaceDialogCFontDialogwxFontDialogCPageSetupDialogwxPageSetupDialogCPrintDialogwxPrintDialogControl ClassesMFC versionwxWidgets versionCAnimateCtrlwxMediaCtrl , wxAnimationCtrlCButtonwxButtonCBitmapButtonwxBitmapButtonCComboBoxwxComboBox ,wxChoiceCDateTimeCtrlwxDatePickerCtrlCEditwxTextCtrlCHotKeyCtrlNone, but see KeybinderCListBox , CDragListBoxwxListBoxCCheckListBoxwxCheckListBoxCListCtrlwxListCtrl ,wxListViewCMonthCalCtrlwxCalendarCtrlCProgressCtrlwxGaugeCReBarCtrlNone, but see contrib/src/fl and wxAUI , wxDockItCRichEditCtrlwxTextCtrlCScrollBarwxScrollBarCSliderCtrlwxSliderCSpinButtonCtrlwxSpinButton ,wxSpinCtrlCStaticwxStaticText ,wxStaticLine ,wxStaticBox , wxStaticBitmapCStatusBarCtrlwxStatusBarCTabCtrlwxTabCtrlCToolBarCtrlwxToolBarCToolTipCtrlwxToolTipCTreeCtrlwxTreeCtrlGraphics ClassesMFC versionwxWidgets versionCBitmapwxBitmap ,wxImage ,wxIcon , wxCursorCBrushwxBrushCPenwxPenCFontwxFontCImageListwxImageList ,wxIconBundleCPalettewxPaletteCRgnwxRegionCClientDCwxClientDCCMetaFileDCwxMetaFileDCCPaintDCwxPaintDCCWindowDCwxWindowDCCDCwxDC ,wxMemoryDCData Structure ClassesMFC versionwxWidgets versionCArray , CObArray , CPtrArraywxArrayCStringArraywxArrayStringCDWordArray , CByteArray , CUIntArraywxArrayIntCList , CPtrList , CObListwxListCStringListwxArrayString ,wxStringListCMapwxHashMapCStringwxStringCPointwxPointCRectwxRectCSizewxSizeCTimewxDateTimeCTimeSpanwxTimeSpan ,wxDateSpanCOleVariantwxVariantInternet ClassesMFC versionwxWidgets versionCSocketwxSocketCFtpConnectionwxFTPCHttpConnectionwxHTTPDocument/View ClassesMFC versionwxWidgets versionCDocumentwxDocumentCViewwxViewCDocTemplate , CSingleDocTemplate , CMultiDocTemplatewxDocTemplateDrag and Drop ClassesMFC versionwxWidgets versionCOleDataSourcewxDataObjectCOleDropSourcewxDropSourceCOleDropTargetwxDropTargetFile ClassesMFC versionwxWidgets versionCFilewxFile ,wxFFile ,wxTextFileCMemFilewxMemoryInputStream ,wxMemoryOutputStreamCSocketFilewxSocketInputStream ,wxSocketOutputStreamCRecentFileListwxFileHistoryMultithreading ClassesMFC versionwxWidgets versionCWinThreadwxThreadCCriticalSectionwxCriticalSectionCMutexwxMutexCSemaphorewxSemaphore

分享到：

 

今天我们来比较 MFC 和 wxWidgets 的最核心的代码，也就是MFC的消息映射和wxWidgets的事件表。

1.MFC 中的消息映射宏

    DECLARE_MESSAGE_MAP()
    BEGIN_MESSAGE_MAP(theClass, baseClass)
    END_MESSAGE_MAP()

展开后代码如下：

#ifdef _AFXDLL
#define DECLARE_MESSAGE_MAP()/
private: /
    static const AFX_MSGMAP_ENTRY _messageEntries[]; /
protected: /
    static AFX_DATA const AFX_MSGMAP messageMap; /
    static const AFX_MSGMAP* PASCAL _GetBaseMessageMap(); /
    virtual const AFX_MSGMAP* GetMessageMap() const; /

#else
#define DECLARE_MESSAGE_MAP() /
private: /
    static const AFX_MSGMAP_ENTRY _messageEntries[]; /
protected: /
    static AFX_DATA const AFX_MSGMAP messageMap; /
    virtual const AFX_MSGMAP* GetMessageMap() const; /

#endif

#ifdef _AFXDLL
# define BEGIN_MESSAGE_MAP(theClass, baseClass)/
    const AFX_MSGMAP* PASCAL theClass::_GetBaseMessageMap() /
        { return &baseClass::messageMap; } /
    const AFX_MSGMAP* theClass::GetMessageMap() const /
        { return &theClass::messageMap; } /
    AFX_COMDAT AFX_DATADEF const AFX_MSGMAP theClass::messageMap = /
    { &theClass::_GetBaseMessageMap, &theClass::_messageEntries[0] }; /
    AFX_COMDAT const AFX_MSGMAP_ENTRY theClass::_messageEntries[] = /
    { /

#else
# define BEGIN_MESSAGE_MAP(theClass, baseClass)/
    const AFX_MSGMAP* theClass::GetMessageMap() const /
        { return &theClass::messageMap; } /
    AFX_COMDAT AFX_DATADEF const AFX_MSGMAP theClass::messageMap = /
    { &baseClass::messageMap, &theClass::_messageEntries[0] }; /
    AFX_COMDAT const AFX_MSGMAP_ENTRY theClass::_messageEntries[] = /
    { /

#endif

# define END_MESSAGE_MAP() /
        {0, 0, 0, 0, AfxSig_end, (AFX_PMSG)0 } /
    }; /


其中 AFX_MSGMAP 和 AFX_MSGMAP_ENTRY 的声明如下：

struct AFX_MSGMAP
{
#ifdef _AFXDLL // use shared dll
    const AFX_MSGMAP* (PASCAL* pfnGetBaseMap)();
#else
    const AFX_MSGMAP* pBaseMap;
#endif
    const AFX_MSGMAP_ENTRY* lpEntries;
};

struct AFX_MSGMAP_ENTRY
{
    UINT nMessage;   // windows message
    UINT nCode;      // control code or WM_NOTIFY code
    UINT nID;        // control ID (or 0 for windows messages)
    UINT nLastID;    // used for entries specifying a range of control id's
    UINT nSig;       // signature type (action) or pointer to message #
    AFX_PMSG pfn;    // routine to call (or special value)
};

2.wxWidgets 中的事件表宏

   DECLARE_EVENT_TABLE()
   BEGIN_EVENT_TABLE(theClass, baseClass)
   END_EVENT_TABLE()

展开后代码如下：

#define DECLARE_EVENT_TABLE() /
    private: /
        static const wxEventTableEntry sm_eventTableEntries[]; /
    protected: /
        static const wxEventTable        sm_eventTable; /
        virtual const wxEventTable*      GetEventTable() const; /
        static wxEventHashTable          sm_eventHashTable; /
        virtual wxEventHashTable&        GetEventHashTable() const;

#define BEGIN_EVENT_TABLE(theClass, baseClass)/
    const wxEventTable theClass::sm_eventTable = /
        { &baseClass::sm_eventTable, &theClass::sm_eventTableEntries[0] }; /
    const wxEventTable *theClass::GetEventTable() const /
        { return &theClass::sm_eventTable; } /
    wxEventHashTable theClass::sm_eventHashTable(theClass::sm_eventTable); /
    wxEventHashTable &theClass::GetEventHashTable() const /
        { return theClass::sm_eventHashTable; } /
    const wxEventTableEntry theClass::sm_eventTableEntries[] = { /

#define END_EVENT_TABLE() DECLARE_EVENT_TABLE_ENTRY( wxEVT_NULL, 0, 0, 0, 0 ) };

struct WXDLLIMPEXP_BASE wxEventTable
{
    const wxEventTable *baseTable;    // base event table (next in chain)
    const wxEventTableEntry *entries; // bottom of entry array
};

class WXDLLIMPEXP_BASE wxEventHashTable
{
private:
    // Internal data structs
    struct EventTypeTable
    {
        wxEventType                   eventType;
        wxEventTableEntryPointerArray eventEntryTable;
    };
    typedef EventTypeTable* EventTypeTablePointer;

public:
    // Constructor, needs the event table it needs to hash later on.
    // Note: hashing of the event table is not done in the constructor as it
    //       can be that the event table is not yet full initialize, the hash
    //       will gets initialized when handling the first event look-up request.
    wxEventHashTable(const wxEventTable &table);
    // Destructor.
    ~wxEventHashTable();

    // Handle the given event, in other words search the event table hash
    // and call self->ProcessEvent() if a match was found.
    bool HandleEvent(wxEvent &event, wxEvtHandler *self);

    // Clear table
    void Clear();

    // Clear all tables
    static void ClearAll();
    // Rebuild all tables
    static void ReconstructAll();

protected:
    // Init the hash table with the entries of the static event table.
    void InitHashTable();
    // Helper funtion of InitHashTable() to insert 1 entry into the hash table.
    void AddEntry(const wxEventTableEntry &entry);
    // Allocate and init with null pointers the base hash table.
    void AllocEventTypeTable(size_t size);
    // Grow the hash table in size and transfer all items currently
    // in the table to the correct location in the new table.
    void GrowEventTypeTable();

protected:
    const wxEventTable    &m_table;
    bool                   m_rebuildHash;

    size_t                 m_size;
    EventTypeTablePointer *m_eventTypeTable;

    static wxEventHashTable* sm_first;
    wxEventHashTable* m_previous;
    wxEventHashTable* m_next;

    DECLARE_NO_COPY_CLASS(wxEventHashTable)
};