include/wx/msw/window.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/msw/window.h
   3 // Purpose:     wxWindowMSW class
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin on 13.05.99: complete refont of message handling,
   6 //              elimination of Default(), ...
   7 // Created:     01/02/97
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) Julian Smart
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 #ifndef _WX_WINDOW_H_
  14 #define _WX_WINDOW_H_
  15
  16 // ---------------------------------------------------------------------------
  17 // constants
  18 // ---------------------------------------------------------------------------
  19
  20 // ---------------------------------------------------------------------------
  21 // wxWindow declaration for MSW
  22 // ---------------------------------------------------------------------------
  23
  24 class WXDLLEXPORT wxWindowMSW : public wxWindowBase
  25 {
  26     friend class wxSpinCtrl;
  27     friend class wxSlider;
  28     friend class wxRadioBox;
  29 #if defined __VISUALC__ && __VISUALC__ <= 1200
  30     friend class wxWindowMSW;
  31 #endif
  32 public:
  33     wxWindowMSW() { Init(); }
  34
  35     wxWindowMSW(wxWindow *parent,
  36                 wxWindowID id,
  37                 const wxPoint& pos = wxDefaultPosition,
  38                 const wxSize& size = wxDefaultSize,
  39                 long style = 0,
  40                 const wxString& name = wxPanelNameStr)
  41     {
  42         Init();
  43         Create(parent, id, pos, size, style, name);
  44     }
  45
  46     virtual ~wxWindowMSW();
  47
  48     bool Create(wxWindow *parent,
  49                 wxWindowID id,
  50                 const wxPoint& pos = wxDefaultPosition,
  51                 const wxSize& size = wxDefaultSize,
  52                 long style = 0,
  53                 const wxString& name = wxPanelNameStr);
  54
  55     // implement base class pure virtuals
  56     virtual void SetLabel(const wxString& label);
  57     virtual wxString GetLabel() const;
  58
  59     virtual void Raise();
  60     virtual void Lower();
  61
  62     virtual bool Show( bool show = true );
  63
  64     virtual void SetFocus();
  65     virtual void SetFocusFromKbd();
  66
  67     virtual bool Reparent(wxWindowBase *newParent);
  68
  69     virtual void WarpPointer(int x, int y);
  70
  71     virtual void Refresh( bool eraseBackground = true,
  72                           const wxRect *rect = (const wxRect *) NULL );
  73     virtual void Update();
  74     virtual void Freeze();
  75     virtual void Thaw();
  76     virtual bool IsFrozen() const { return m_frozenness > 0; }
  77
  78     virtual void SetWindowStyleFlag(long style);
  79     virtual void SetExtraStyle(long exStyle);
  80     virtual bool SetCursor( const wxCursor &cursor );
  81     virtual bool SetFont( const wxFont &font );
  82
  83     virtual int GetCharHeight() const;
  84     virtual int GetCharWidth() const;
  85     virtual void GetTextExtent(const wxString& string,
  86                                int *x, int *y,
  87                                int *descent = (int *) NULL,
  88                                int *externalLeading = (int *) NULL,
  89                                const wxFont *theFont = (const wxFont *) NULL)
  90                                const;
  91
  92     virtual void SetScrollbar( int orient, int pos, int thumbVisible,
  93                                int range, bool refresh = true );
  94     virtual void SetScrollPos( int orient, int pos, bool refresh = true );
  95     virtual int GetScrollPos( int orient ) const;
  96     virtual int GetScrollThumb( int orient ) const;
  97     virtual int GetScrollRange( int orient ) const;
  98     virtual void ScrollWindow( int dx, int dy,
  99                                const wxRect* rect = (wxRect *) NULL );
 100
 101     virtual bool ScrollLines(int lines);
 102     virtual bool ScrollPages(int pages);
 103
 104     virtual void SetLayoutDirection(wxLayoutDirection dir);
 105     virtual wxLayoutDirection GetLayoutDirection() const;
 106     virtual wxCoord AdjustForLayoutDirection(wxCoord x,
 107                                              wxCoord width,
 108                                              wxCoord widthTotal) const;
 109
 110 #if wxUSE_DRAG_AND_DROP
 111     virtual void SetDropTarget( wxDropTarget *dropTarget );
 112 #endif // wxUSE_DRAG_AND_DROP
 113
 114     // Accept files for dragging
 115     virtual void DragAcceptFiles(bool accept);
 116
 117 #ifndef __WXUNIVERSAL__
 118     // Native resource loading (implemented in src/msw/nativdlg.cpp)
 119     // FIXME: should they really be all virtual?
 120     virtual bool LoadNativeDialog(wxWindow* parent, wxWindowID& id);
 121     virtual bool LoadNativeDialog(wxWindow* parent, const wxString& name);
 122     wxWindow* GetWindowChild1(wxWindowID id);
 123     wxWindow* GetWindowChild(wxWindowID id);
 124 #endif // __WXUNIVERSAL__
 125
 126 #if wxUSE_HOTKEY
 127     // install and deinstall a system wide hotkey
 128     virtual bool RegisterHotKey(int hotkeyId, int modifiers, int keycode);
 129     virtual bool UnregisterHotKey(int hotkeyId);
 130 #endif // wxUSE_HOTKEY
 131
 132 #ifdef __POCKETPC__
 133     bool IsContextMenuEnabled() const { return m_contextMenuEnabled; }
 134     void EnableContextMenu(bool enable = true) { m_contextMenuEnabled = enable; }
 135 #endif
 136
 137     // window handle stuff
 138     // -------------------
 139
 140     WXHWND GetHWND() const { return m_hWnd; }
 141     void SetHWND(WXHWND hWnd) { m_hWnd = hWnd; }
 142     virtual WXWidget GetHandle() const { return GetHWND(); }
 143
 144     void AssociateHandle(WXWidget handle);
 145     void DissociateHandle();
 146
 147     // does this window have deferred position and/or size?
 148     bool IsSizeDeferred() const;
 149
 150     // these functions allow to register a global handler for the given Windows
 151     // message: it will be called from MSWWindowProc() of any window which gets
 152     // this event if it's not processed before (i.e. unlike a hook procedure it
 153     // does not override the normal processing)
 154     //
 155     // notice that if you want to process a message for a given window only you
 156     // should override its MSWWindowProc() instead
 157
 158     // type of the handler: it is called with the message parameters (except
 159     // that the window object is passed instead of window handle) and should
 160     // return true if it handled the message or false if it should be passed to
 161     // DefWindowProc()
 162     typedef bool (*MSWMessageHandler)(wxWindowMSW *win,
 163                                       WXUINT nMsg,
 164                                       WXWPARAM wParam,
 165                                       WXLPARAM lParam);
 166
 167     // install a handler, shouldn't be called more than one for the same message
 168     static bool MSWRegisterMessageHandler(int msg, MSWMessageHandler handler);
 169
 170     // unregister a previously registered handler
 171     static void MSWUnregisterMessageHandler(int msg, MSWMessageHandler handler);
 172
 173
 174     // implementation from now on
 175     // ==========================
 176
 177     // event handlers
 178     // --------------
 179
 180     void OnPaint(wxPaintEvent& event);
 181     void OnEraseBackground(wxEraseEvent& event);
 182 #ifdef __WXWINCE__
 183     void OnInitDialog(wxInitDialogEvent& event);
 184 #endif
 185
 186 public:
 187     // Windows subclassing
 188     void SubclassWin(WXHWND hWnd);
 189     void UnsubclassWin();
 190
 191     WXFARPROC MSWGetOldWndProc() const { return m_oldWndProc; }
 192     void MSWSetOldWndProc(WXFARPROC proc) { m_oldWndProc = proc; }
 193
 194     // return true if the window is of a standard (i.e. not wxWidgets') class
 195     //
 196     // to understand why does it work, look at SubclassWin() code and comments
 197     bool IsOfStandardClass() const { return m_oldWndProc != NULL; }
 198
 199     wxWindow *FindItem(long id) const;
 200     wxWindow *FindItemByHWND(WXHWND hWnd, bool controlOnly = false) const;
 201
 202     // MSW only: true if this control is part of the main control
 203     virtual bool ContainsHWND(WXHWND WXUNUSED(hWnd)) const { return false; }
 204
 205 #if wxUSE_TOOLTIPS
 206     // MSW only: true if this window or any of its children have a tooltip
 207     virtual bool HasToolTips() const { return GetToolTip() != NULL; }
 208 #endif // wxUSE_TOOLTIPS
 209
 210     // translate wxWidgets style flags for this control into the Windows style
 211     // and optional extended style for the corresponding native control
 212     //
 213     // this is the function that should be overridden in the derived classes,
 214     // but you will mostly use MSWGetCreateWindowFlags() below
 215     virtual WXDWORD MSWGetStyle(long flags, WXDWORD *exstyle = NULL) const ;
 216
 217     // get the MSW window flags corresponding to wxWidgets ones
 218     //
 219     // the functions returns the flags (WS_XXX) directly and puts the ext
 220     // (WS_EX_XXX) flags into the provided pointer if not NULL
 221     WXDWORD MSWGetCreateWindowFlags(WXDWORD *exflags = NULL) const
 222         { return MSWGetStyle(GetWindowStyle(), exflags); }
 223
 224     // update the real underlying window style flags to correspond to the
 225     // current wxWindow object style (safe to call even if window isn't fully
 226     // created yet)
 227     void MSWUpdateStyle(long flagsOld, long exflagsOld);
 228
 229     // translate wxWidgets coords into Windows ones suitable to be passed to
 230     // ::CreateWindow()
 231     //
 232     // returns true if non default coords are returned, false otherwise
 233     bool MSWGetCreateWindowCoords(const wxPoint& pos,
 234                                   const wxSize& size,
 235                                   int& x, int& y,
 236                                   int& w, int& h) const;
 237
 238     // get the HWND to be used as parent of this window with CreateWindow()
 239     virtual WXHWND MSWGetParent() const;
 240
 241     // creates the window of specified Windows class with given style, extended
 242     // style, title and geometry (default values
 243     //
 244     // returns true if the window has been created, false if creation failed
 245     bool MSWCreate(const wxChar *wclass,
 246                    const wxChar *title = NULL,
 247                    const wxPoint& pos = wxDefaultPosition,
 248                    const wxSize& size = wxDefaultSize,
 249                    WXDWORD style = 0,
 250                    WXDWORD exendedStyle = 0);
 251
 252     virtual bool MSWCommand(WXUINT param, WXWORD id);
 253
 254 #ifndef __WXUNIVERSAL__
 255     // Create an appropriate wxWindow from a HWND
 256     virtual wxWindow* CreateWindowFromHWND(wxWindow* parent, WXHWND hWnd);
 257
 258     // Make sure the window style reflects the HWND style (roughly)
 259     virtual void AdoptAttributesFromHWND();
 260 #endif // __WXUNIVERSAL__
 261
 262     // Setup background and foreground colours correctly
 263     virtual void SetupColours();
 264
 265     // ------------------------------------------------------------------------
 266     // helpers for message handlers: these perform the same function as the
 267     // message crackers from <windowsx.h> - they unpack WPARAM and LPARAM into
 268     // the correct parameters
 269     // ------------------------------------------------------------------------
 270
 271     void UnpackCommand(WXWPARAM wParam, WXLPARAM lParam,
 272                        WXWORD *id, WXHWND *hwnd, WXWORD *cmd);
 273     void UnpackActivate(WXWPARAM wParam, WXLPARAM lParam,
 274                         WXWORD *state, WXWORD *minimized, WXHWND *hwnd);
 275     void UnpackScroll(WXWPARAM wParam, WXLPARAM lParam,
 276                       WXWORD *code, WXWORD *pos, WXHWND *hwnd);
 277     void UnpackCtlColor(WXWPARAM wParam, WXLPARAM lParam,
 278                         WXHDC *hdc, WXHWND *hwnd);
 279     void UnpackMenuSelect(WXWPARAM wParam, WXLPARAM lParam,
 280                           WXWORD *item, WXWORD *flags, WXHMENU *hmenu);
 281
 282     // ------------------------------------------------------------------------
 283     // internal handlers for MSW messages: all handlers return a boolean value:
 284     // true means that the handler processed the event and false that it didn't
 285     // ------------------------------------------------------------------------
 286
 287     // there are several cases where we have virtual functions for Windows
 288     // message processing: this is because these messages often require to be
 289     // processed in a different manner in the derived classes. For all other
 290     // messages, however, we do *not* have corresponding MSWOnXXX() function
 291     // and if the derived class wants to process them, it should override
 292     // MSWWindowProc() directly.
 293
 294     // scroll event (both horizontal and vertical)
 295     virtual bool MSWOnScroll(int orientation, WXWORD nSBCode,
 296                              WXWORD pos, WXHWND control);
 297
 298     // child control notifications
 299     virtual bool MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result);
 300
 301     // owner-drawn controls need to process these messages
 302     virtual bool MSWOnDrawItem(int id, WXDRAWITEMSTRUCT *item);
 303     virtual bool MSWOnMeasureItem(int id, WXMEASUREITEMSTRUCT *item);
 304
 305     // the rest are not virtual
 306     bool HandleCreate(WXLPCREATESTRUCT cs, bool *mayCreate);
 307     bool HandleInitDialog(WXHWND hWndFocus);
 308     bool HandleDestroy();
 309
 310     bool HandlePaint();
 311     bool HandlePrintClient(WXHDC hDC);
 312     bool HandleEraseBkgnd(WXHDC hDC);
 313
 314     bool HandleMinimize();
 315     bool HandleMaximize();
 316     bool HandleSize(int x, int y, WXUINT flag);
 317     bool HandleSizing(wxRect& rect);
 318     bool HandleGetMinMaxInfo(void *mmInfo);
 319     bool HandleEnterSizeMove();
 320     bool HandleExitSizeMove();
 321
 322     bool HandleShow(bool show, int status);
 323     bool HandleActivate(int flag, bool minimized, WXHWND activate);
 324
 325     bool HandleCommand(WXWORD id, WXWORD cmd, WXHWND control);
 326
 327     bool HandleCtlColor(WXHBRUSH *hBrush, WXHDC hdc, WXHWND hWnd);
 328
 329     bool HandlePaletteChanged(WXHWND hWndPalChange);
 330     bool HandleQueryNewPalette();
 331     bool HandleSysColorChange();
 332     bool HandleDisplayChange();
 333     bool HandleCaptureChanged(WXHWND gainedCapture);
 334     virtual bool HandleSettingChange(WXWPARAM wParam, WXLPARAM lParam);
 335
 336     bool HandleQueryEndSession(long logOff, bool *mayEnd);
 337     bool HandleEndSession(bool endSession, long logOff);
 338
 339     bool HandleSetFocus(WXHWND wnd);
 340     bool HandleKillFocus(WXHWND wnd);
 341
 342     bool HandleDropFiles(WXWPARAM wParam);
 343
 344     bool HandleMouseEvent(WXUINT msg, int x, int y, WXUINT flags);
 345     bool HandleMouseMove(int x, int y, WXUINT flags);
 346     bool HandleMouseWheel(WXWPARAM wParam, WXLPARAM lParam);
 347
 348     bool HandleChar(WXWPARAM wParam, WXLPARAM lParam, bool isASCII = false);
 349     bool HandleKeyDown(WXWPARAM wParam, WXLPARAM lParam);
 350     bool HandleKeyUp(WXWPARAM wParam, WXLPARAM lParam);
 351 #if wxUSE_ACCEL
 352     bool HandleHotKey(WXWPARAM wParam, WXLPARAM lParam);
 353 #endif
 354 #ifdef __WIN32__
 355     int HandleMenuChar(int chAccel, WXLPARAM lParam);
 356 #endif
 357     // Create and process a clipboard event specified by type.
 358     bool HandleClipboardEvent( WXUINT nMsg );
 359
 360     bool HandleQueryDragIcon(WXHICON *hIcon);
 361
 362     bool HandleSetCursor(WXHWND hWnd, short nHitTest, int mouseMsg);
 363
 364     bool HandlePower(WXWPARAM wParam, WXLPARAM lParam, bool *vetoed);
 365
 366
 367     // Window procedure
 368     virtual WXLRESULT MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam);
 369
 370     // Calls an appropriate default window procedure
 371     virtual WXLRESULT MSWDefWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam);
 372
 373     // message processing helpers
 374
 375     // return false if the message shouldn't be translated/preprocessed but
 376     // dispatched normally
 377     virtual bool MSWShouldPreProcessMessage(WXMSG* pMsg);
 378
 379     // return true if the message was preprocessed and shouldn't be dispatched
 380     virtual bool MSWProcessMessage(WXMSG* pMsg);
 381
 382     // return true if the message was translated and shouldn't be dispatched
 383     virtual bool MSWTranslateMessage(WXMSG* pMsg);
 384
 385     // called when the window is about to be destroyed
 386     virtual void MSWDestroyWindow();
 387
 388
 389     // this function should return the brush to paint the children controls
 390     // background or 0 if this window doesn't impose any particular background
 391     // on its children
 392     //
 393     // the base class version returns a solid brush if we have a non default
 394     // background colour or 0 otherwise
 395     virtual WXHBRUSH MSWGetBgBrushForChild(WXHDC hDC, WXHWND hWnd);
 396
 397     // return the background brush to use for painting the given window by
 398     // quering the parent windows via their MSWGetBgBrushForChild() recursively
 399     //
 400     // hWndToPaint is normally NULL meaning this window itself, but it can also
 401     // be a child of this window which is used by the static box and could be
 402     // potentially useful for other transparent controls
 403     WXHBRUSH MSWGetBgBrush(WXHDC hDC, WXHWND hWndToPaint = NULL);
 404
 405     // gives the parent the possibility to draw its children background, e.g.
 406     // this is used by wxNotebook to do it using DrawThemeBackground()
 407     //
 408     // return true if background was drawn, false otherwise
 409     virtual bool MSWPrintChild(WXHDC WXUNUSED(hDC), wxWindow * WXUNUSED(child))
 410     {
 411         return false;
 412     }
 413
 414     // some controls (e.g. wxListBox) need to set the return value themselves
 415     //
 416     // return true to let parent handle it if we don't, false otherwise
 417     virtual bool MSWShouldPropagatePrintChild()
 418     {
 419         return true;
 420     }
 421
 422
 423     // Responds to colour changes: passes event on to children.
 424     void OnSysColourChanged(wxSysColourChangedEvent& event);
 425
 426     // initialize various fields of wxMouseEvent (common part of MSWOnMouseXXX)
 427     void InitMouseEvent(wxMouseEvent& event, int x, int y, WXUINT flags);
 428
 429     // check if mouse is in the window
 430     bool IsMouseInWindow() const;
 431
 432     // check if a native double-buffering applies for this window
 433     virtual bool IsDoubleBuffered() const;
 434
 435     // synthesize a wxEVT_LEAVE_WINDOW event and set m_mouseInWindow to false
 436     void GenerateMouseLeave();
 437
 438     // virtual function for implementing internal idle
 439     // behaviour
 440     virtual void OnInternalIdle();
 441
 442 protected:
 443     // this allows you to implement standard control borders without
 444     // repeating the code in different classes that are not derived from
 445     // wxControl
 446     virtual wxBorder GetDefaultBorderForControl() const;
 447
 448     // choose the default border for this window
 449     virtual wxBorder GetDefaultBorder() const;
 450
 451 #if wxUSE_MENUS_NATIVE
 452     virtual bool DoPopupMenu( wxMenu *menu, int x, int y );
 453 #endif // wxUSE_MENUS_NATIVE
 454
 455     // the window handle
 456     WXHWND                m_hWnd;
 457
 458     // the old window proc (we subclass all windows)
 459     WXFARPROC             m_oldWndProc;
 460
 461     // additional (MSW specific) flags
 462     bool                  m_mouseInWindow:1;
 463     bool                  m_lastKeydownProcessed:1;
 464
 465     // the size of one page for scrolling
 466     int                   m_xThumbSize;
 467     int                   m_yThumbSize;
 468
 469     // implement the base class pure virtuals
 470     virtual void DoClientToScreen( int *x, int *y ) const;
 471     virtual void DoScreenToClient( int *x, int *y ) const;
 472     virtual void DoGetPosition( int *x, int *y ) const;
 473     virtual void DoGetSize( int *width, int *height ) const;
 474     virtual void DoGetClientSize( int *width, int *height ) const;
 475     virtual void DoSetSize(int x, int y,
 476                            int width, int height,
 477                            int sizeFlags = wxSIZE_AUTO);
 478     virtual void DoSetClientSize(int width, int height);
 479
 480     virtual void DoCaptureMouse();
 481     virtual void DoReleaseMouse();
 482
 483     virtual void DoEnable(bool enable);
 484
 485     // this simply moves/resizes the given HWND which is supposed to be our
 486     // sibling (this is useful for controls which are composite at MSW level
 487     // and for which DoMoveWindow() is not enough)
 488     //
 489     // returns true if the window move was deferred, false if it was moved
 490     // immediately (no error return)
 491     bool DoMoveSibling(WXHWND hwnd, int x, int y, int width, int height);
 492
 493     // move the window to the specified location and resize it: this is called
 494     // from both DoSetSize() and DoSetClientSize() and would usually just call
 495     // ::MoveWindow() except for composite controls which will want to arrange
 496     // themselves inside the given rectangle
 497     virtual void DoMoveWindow(int x, int y, int width, int height);
 498
 499 #if wxUSE_TOOLTIPS
 500     virtual void DoSetToolTip( wxToolTip *tip );
 501
 502     // process TTN_NEEDTEXT message properly (i.e. fixing the bugs in
 503     // comctl32.dll in our code -- see the function body for more info)
 504     bool HandleTooltipNotify(WXUINT code,
 505                              WXLPARAM lParam,
 506                              const wxString& ttip);
 507 #endif // wxUSE_TOOLTIPS
 508
 509     // the helper functions used by HandleChar/KeyXXX methods
 510     wxKeyEvent CreateKeyEvent(wxEventType evType, int id,
 511                               WXLPARAM lParam = 0, WXWPARAM wParam = 0) const;
 512
 513
 514     // default OnEraseBackground() implementation, return true if we did erase
 515     // the background, false otherwise (i.e. the system should erase it)
 516     bool DoEraseBackground(WXHDC hDC);
 517
 518     // generate WM_CHANGEUISTATE if it's needed for the OS we're running under
 519     //
 520     // action should be one of the UIS_XXX constants
 521     // state should be one or more of the UISF_XXX constants
 522     // if action == UIS_INITIALIZE then it doesn't seem to matter what we use
 523     // for state as the system will decide for us what needs to be set
 524     void MSWUpdateUIState(int action, int state = 0);
 525
 526 private:
 527     // common part of all ctors
 528     void Init();
 529
 530     // the (non-virtual) handlers for the events
 531     bool HandleMove(int x, int y);
 532     bool HandleMoving(wxRect& rect);
 533     bool HandleJoystickEvent(WXUINT msg, int x, int y, WXUINT flags);
 534     bool HandleNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result);
 535
 536
 537     // number of calls to Freeze() minus number of calls to Thaw()
 538     unsigned int m_frozenness;
 539
 540     // current defer window position operation handle (may be NULL)
 541     WXHANDLE m_hDWP;
 542
 543 protected:
 544     // When deferred positioning is done these hold the pending changes, and
 545     // are used for the default values if another size/pos changes is done on
 546     // this window before the group of deferred changes is completed.
 547     wxPoint     m_pendingPosition;
 548     wxSize      m_pendingSize;
 549
 550 private:
 551 #ifdef __POCKETPC__
 552     bool        m_contextMenuEnabled;
 553 #endif
 554
 555     DECLARE_DYNAMIC_CLASS(wxWindowMSW)
 556     DECLARE_NO_COPY_CLASS(wxWindowMSW)
 557     DECLARE_EVENT_TABLE()
 558 };
 559
 560 // ----------------------------------------------------------------------------
 561 // inline functions
 562 // ----------------------------------------------------------------------------
 563
 564 // ---------------------------------------------------------------------------
 565 // global functions
 566 // ---------------------------------------------------------------------------
 567
 568 // kbd code translation
 569 WXDLLEXPORT int wxCharCodeMSWToWX(int keySym, WXLPARAM lParam = 0);
 570 WXDLLEXPORT WXWORD wxCharCodeWXToMSW(int id, bool *IsVirtual = NULL);
 571
 572 // window creation helper class: before creating a new HWND, instantiate an
 573 // object of this class on stack - this allows to process the messages sent to
 574 // the window even before CreateWindow() returns
 575 class wxWindowCreationHook
 576 {
 577 public:
 578     wxWindowCreationHook(wxWindowMSW *winBeingCreated);
 579     ~wxWindowCreationHook();
 580 };
 581
 582 // ----------------------------------------------------------------------------
 583 // global objects
 584 // ----------------------------------------------------------------------------
 585
 586 // notice that this hash must be defined after wxWindow declaration as it
 587 // needs to "see" its dtor and not just forward declaration
 588 #include "wx/hash.h"
 589
 590 // pseudo-template HWND <-> wxWindow hash table
 591 WX_DECLARE_HASH(wxWindowMSW, wxWindowList, wxWinHashTable);
 592
 593 extern wxWinHashTable *wxWinHandleHash;
 594
 595 #endif // _WX_WINDOW_H_