include/wx/msw/private.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        private.h
   3 // Purpose:     Private declarations: as this header is only included by
   4 //              wxWidgets itself, it may contain identifiers which don't start
   5 //              with "wx".
   6 // Author:      Julian Smart
   7 // Modified by:
   8 // Created:     01/02/97
   9 // RCS-ID:      $Id$
  10 // Copyright:   (c) Julian Smart
  11 // Licence:     wxWindows licence
  12 /////////////////////////////////////////////////////////////////////////////
  13
  14 #ifndef _WX_PRIVATE_H_
  15 #define _WX_PRIVATE_H_
  16
  17 #include "wx/msw/wrapwin.h"
  18
  19 #ifdef __WXMICROWIN__
  20     // Extra prototypes and symbols not defined by MicroWindows
  21     #include "wx/msw/microwin.h"
  22 #endif
  23
  24 // Include fixes for MSLU:
  25 #include "wx/msw/mslu.h"
  26
  27 #include "wx/log.h"
  28
  29 class WXDLLEXPORT wxFont;
  30 class WXDLLEXPORT wxWindow;
  31
  32 // ---------------------------------------------------------------------------
  33 // private constants
  34 // ---------------------------------------------------------------------------
  35
  36 // 260 was taken from windef.h
  37 #ifndef MAX_PATH
  38     #define MAX_PATH  260
  39 #endif
  40
  41 // ---------------------------------------------------------------------------
  42 // standard icons from the resources
  43 // ---------------------------------------------------------------------------
  44
  45 #if wxUSE_GUI
  46
  47 WXDLLEXPORT_DATA(extern HICON) wxSTD_FRAME_ICON;
  48 WXDLLEXPORT_DATA(extern HICON) wxSTD_MDIPARENTFRAME_ICON;
  49 WXDLLEXPORT_DATA(extern HICON) wxSTD_MDICHILDFRAME_ICON;
  50 WXDLLEXPORT_DATA(extern HICON) wxDEFAULT_FRAME_ICON;
  51 WXDLLEXPORT_DATA(extern HICON) wxDEFAULT_MDIPARENTFRAME_ICON;
  52 WXDLLEXPORT_DATA(extern HICON) wxDEFAULT_MDICHILDFRAME_ICON;
  53 WXDLLEXPORT_DATA(extern HFONT) wxSTATUS_LINE_FONT;
  54
  55 #endif // wxUSE_GUI
  56
  57 // ---------------------------------------------------------------------------
  58 // define things missing from some compilers' headers
  59 // ---------------------------------------------------------------------------
  60
  61 #if defined(__WXWINCE__) || (defined(__GNUWIN32__) && !wxUSE_NORLANDER_HEADERS)
  62 #ifndef ZeroMemory
  63     inline void ZeroMemory(void *buf, size_t len) { memset(buf, 0, len); }
  64 #endif
  65 #endif // old mingw32
  66
  67 // this defines a CASTWNDPROC macro which casts a pointer to the type of a
  68 // window proc
  69 #if defined(STRICT) || defined(__GNUC__)
  70     typedef WNDPROC WndProcCast;
  71 #else
  72     typedef FARPROC WndProcCast;
  73 #endif
  74
  75
  76 #define CASTWNDPROC (WndProcCast)
  77
  78
  79
  80 // ---------------------------------------------------------------------------
  81 // some stuff for old Windows versions (FIXME: what does it do here??)
  82 // ---------------------------------------------------------------------------
  83
  84 #if !defined(APIENTRY)  // NT defines APIENTRY, 3.x not
  85     #define APIENTRY FAR PASCAL
  86 #endif
  87
  88 #ifdef __WIN32__
  89     #define _EXPORT
  90 #else
  91     #define _EXPORT _export
  92 #endif
  93
  94 #ifndef __WIN32__
  95     typedef signed short int SHORT;
  96 #endif
  97
  98 #if !defined(__WIN32__)  // 3.x uses FARPROC for dialogs
  99 #ifndef STRICT
 100     #define DLGPROC FARPROC
 101 #endif
 102 #endif
 103
 104 #if wxUSE_PENWIN
 105     WXDLLEXPORT void wxRegisterPenWin();
 106     WXDLLEXPORT void wxCleanUpPenWin();
 107     WXDLLEXPORT void wxEnablePenAppHooks (bool hook);
 108 #endif // wxUSE_PENWIN
 109
 110 #if wxUSE_ITSY_BITSY
 111     #define IBS_HORZCAPTION    0x4000L
 112     #define IBS_VERTCAPTION    0x8000L
 113
 114     UINT    WINAPI ibGetCaptionSize( HWND hWnd  ) ;
 115     UINT    WINAPI ibSetCaptionSize( HWND hWnd, UINT nSize ) ;
 116     LRESULT WINAPI ibDefWindowProc( HWND hWnd, UINT uiMsg, WPARAM wParam, LPARAM lParam ) ;
 117     VOID    WINAPI ibAdjustWindowRect( HWND hWnd, LPRECT lprc ) ;
 118 #endif // wxUSE_ITSY_BITSY
 119
 120 #if wxUSE_CTL3D
 121     #include "wx/msw/ctl3d/ctl3d.h"
 122 #endif // wxUSE_CTL3D
 123
 124 /*
 125  * Decide what window classes we're going to use
 126  * for this combination of CTl3D/FAFA settings
 127  */
 128
 129 #define STATIC_CLASS     wxT("STATIC")
 130 #define STATIC_FLAGS     (SS_LEFT|WS_CHILD|WS_VISIBLE)
 131 #define CHECK_CLASS      wxT("BUTTON")
 132 #define CHECK_FLAGS      (BS_AUTOCHECKBOX|WS_TABSTOP|WS_CHILD)
 133 #define CHECK_IS_FAFA    FALSE
 134 #define RADIO_CLASS      wxT("BUTTON")
 135 #define RADIO_FLAGS      (BS_AUTORADIOBUTTON|WS_CHILD|WS_VISIBLE)
 136 #define RADIO_SIZE       20
 137 #define RADIO_IS_FAFA    FALSE
 138 #define PURE_WINDOWS
 139 #define GROUP_CLASS      wxT("BUTTON")
 140 #define GROUP_FLAGS      (BS_GROUPBOX|WS_CHILD|WS_VISIBLE)
 141
 142 /*
 143 #define BITCHECK_FLAGS   (FB_BITMAP|FC_BUTTONDRAW|FC_DEFAULT|WS_VISIBLE)
 144 #define BITRADIO_FLAGS   (FC_BUTTONDRAW|FB_BITMAP|FC_RADIO|WS_CHILD|WS_VISIBLE)
 145 */
 146
 147 // ---------------------------------------------------------------------------
 148 // misc macros
 149 // ---------------------------------------------------------------------------
 150
 151 #define MEANING_CHARACTER '0'
 152 #define DEFAULT_ITEM_WIDTH  100
 153 #define DEFAULT_ITEM_HEIGHT 80
 154
 155 // Scale font to get edit control height
 156 //#define EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)    (3*(cy)/2)
 157 #define EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)    (cy+8)
 158
 159 // Generic subclass proc, for panel item moving/sizing and intercept
 160 // EDIT control VK_RETURN messages
 161 extern LONG APIENTRY _EXPORT
 162   wxSubclassedGenericControlProc(WXHWND hWnd, WXUINT message, WXWPARAM wParam, WXLPARAM lParam);
 163
 164 // ---------------------------------------------------------------------------
 165 // useful macros and functions
 166 // ---------------------------------------------------------------------------
 167
 168 // a wrapper macro for ZeroMemory()
 169 #if defined(__WIN32__) && !defined(__WXMICROWIN__)
 170 #define wxZeroMemory(obj)   ::ZeroMemory(&obj, sizeof(obj))
 171 #else
 172 #define wxZeroMemory(obj)   memset((void*) & obj, 0, sizeof(obj))
 173 #endif
 174
 175 #if wxUSE_GUI
 176
 177 #include <wx/gdicmn.h>
 178 #include <wx/colour.h>
 179
 180 // make conversion from wxColour and COLORREF a bit less painful
 181 inline COLORREF wxColourToRGB(const wxColour& c)
 182 {
 183     return RGB(c.Red(), c.Green(), c.Blue());
 184 }
 185
 186 inline COLORREF wxColourToPalRGB(const wxColour& c)
 187 {
 188     return PALETTERGB(c.Red(), c.Green(), c.Blue());
 189 }
 190
 191 inline wxColour wxRGBToColour(COLORREF rgb)
 192 {
 193     return wxColour(GetRValue(rgb), GetGValue(rgb), GetBValue(rgb));
 194 }
 195
 196 inline void wxRGBToColour(wxColour& c, COLORREF rgb)
 197 {
 198     c.Set(GetRValue(rgb), GetGValue(rgb), GetBValue(rgb));
 199 }
 200
 201 // get the standard colour map for some standard colours - see comment in this
 202 // function to understand why is it needed and when should it be used
 203 //
 204 // it returns a wxCOLORMAP (can't use COLORMAP itself here as comctl32.dll
 205 // might be not included/available) array of size wxSTD_COLOUR_MAX
 206 //
 207 // NB: if you change these colours, update wxBITMAP_STD_COLOURS in the
 208 //     resources as well: it must have the same number of pixels!
 209 enum wxSTD_COLOUR
 210 {
 211     wxSTD_COL_BTNTEXT,
 212     wxSTD_COL_BTNSHADOW,
 213     wxSTD_COL_BTNFACE,
 214     wxSTD_COL_BTNHIGHLIGHT,
 215     wxSTD_COL_MAX
 216 };
 217
 218 struct WXDLLEXPORT wxCOLORMAP
 219 {
 220     COLORREF from, to;
 221 };
 222
 223 // this function is implemented in src/msw/window.cpp
 224 extern wxCOLORMAP *wxGetStdColourMap();
 225
 226 // create a wxRect from Windows RECT
 227 inline wxRect wxRectFromRECT(const RECT& r)
 228 {
 229     return wxRect(r.left, r.top, r.right - r.left, r.bottom - r.top);
 230 }
 231
 232 // copy Windows RECT to our wxRect
 233 inline void wxCopyRECTToRect(const RECT& r, wxRect& rect)
 234 {
 235     rect = wxRectFromRECT(r);
 236 }
 237
 238 // translations between HIMETRIC units (which OLE likes) and pixels (which are
 239 // liked by all the others) - implemented in msw/utilsexc.cpp
 240 extern void HIMETRICToPixel(LONG *x, LONG *y);
 241 extern void PixelToHIMETRIC(LONG *x, LONG *y);
 242
 243 // Windows convention of the mask is opposed to the wxWidgets one, so we need
 244 // to invert the mask each time we pass one/get one to/from Windows
 245 extern HBITMAP wxInvertMask(HBITMAP hbmpMask, int w = 0, int h = 0);
 246
 247 // Creates an icon or cursor depending from a bitmap
 248 //
 249 // The bitmap must be valid and it should have a mask. If it doesn't, a default
 250 // mask is created using light grey as the transparent colour.
 251 extern HICON wxBitmapToHICON(const wxBitmap& bmp);
 252
 253 // Same requirments as above apply and the bitmap must also have the correct
 254 // size.
 255 extern
 256 HCURSOR wxBitmapToHCURSOR(const wxBitmap& bmp, int hotSpotX, int hotSpotY);
 257
 258 // get (x, y) from DWORD - notice that HI/LOWORD can *not* be used because they
 259 // will fail on system with multiple monitors where the coords may be negative
 260 //
 261 // these macros are standard now (Win98) but some older headers don't have them
 262 #ifndef GET_X_LPARAM
 263     #define GET_X_LPARAM(lp) ((int)(short)LOWORD(lp))
 264     #define GET_Y_LPARAM(lp) ((int)(short)HIWORD(lp))
 265 #endif // GET_X_LPARAM
 266
 267 // get the current state of SHIFT/CTRL keys
 268 inline bool wxIsShiftDown()
 269 {
 270 //    return (::GetKeyState(VK_SHIFT) & 0x100) != 0;
 271     // Returns different negative values on WinME and WinNT,
 272     // so simply test for negative value.
 273     return ::GetKeyState(VK_SHIFT) < 0;
 274 }
 275
 276 inline bool wxIsCtrlDown()
 277 {
 278 //    return (::GetKeyState(VK_CONTROL) & 0x100) != 0;
 279     // Returns different negative values on WinME and WinNT,
 280     // so simply test for negative value.
 281     return ::GetKeyState(VK_CONTROL) < 0;
 282 }
 283
 284 // wrapper around GetWindowRect() and GetClientRect() APIs doing error checking
 285 // for Win32
 286 inline RECT wxGetWindowRect(HWND hwnd)
 287 {
 288     RECT rect;
 289
 290     if ( !::GetWindowRect(hwnd, &rect) )
 291     {
 292         wxLogLastError(_T("GetWindowRect"));
 293     }
 294
 295     return rect;
 296 }
 297
 298 inline RECT wxGetClientRect(HWND hwnd)
 299 {
 300     RECT rect;
 301
 302     if ( !::GetClientRect(hwnd, &rect) )
 303     {
 304         wxLogLastError(_T("GetClientRect"));
 305     }
 306
 307     return rect;
 308 }
 309
 310 // ---------------------------------------------------------------------------
 311 // small helper classes
 312 // ---------------------------------------------------------------------------
 313
 314 // a template to make initializing Windows styructs less painful: it zeroes all
 315 // the struct fields and also sets cbSize member to the correct value (and so
 316 // can be only used with structures which have this member...)
 317 template <class T>
 318 struct WinStruct : public T
 319 {
 320     WinStruct()
 321     {
 322         ::ZeroMemory(this, sizeof(T));
 323
 324         // explicit qualification is required here for this to be valid C++
 325         this->cbSize = sizeof(T);
 326     }
 327 };
 328
 329
 330 // create an instance of this class and use it as the HDC for screen, will
 331 // automatically release the DC going out of scope
 332 class ScreenHDC
 333 {
 334 public:
 335     ScreenHDC() { m_hdc = ::GetDC(NULL);    }
 336    ~ScreenHDC() { ::ReleaseDC(NULL, m_hdc); }
 337
 338     operator HDC() const { return m_hdc; }
 339
 340 private:
 341     HDC m_hdc;
 342
 343     DECLARE_NO_COPY_CLASS(ScreenHDC)
 344 };
 345
 346 // the same as ScreenHDC but for window DCs
 347 class WindowHDC
 348 {
 349 public:
 350     WindowHDC(HWND hwnd) { m_hdc = ::GetDC(m_hwnd = hwnd); }
 351    ~WindowHDC() { ::ReleaseDC(m_hwnd, m_hdc); }
 352
 353     operator HDC() const { return m_hdc; }
 354
 355 private:
 356    HWND m_hwnd;
 357    HDC m_hdc;
 358
 359    DECLARE_NO_COPY_CLASS(WindowHDC)
 360 };
 361
 362 // the same as ScreenHDC but for memory DCs: creates the HDC compatible with
 363 // the given one (screen by default) in ctor and destroys it in dtor
 364 class MemoryHDC
 365 {
 366 public:
 367     MemoryHDC(HDC hdc = 0) { m_hdc = ::CreateCompatibleDC(hdc); }
 368    ~MemoryHDC() { ::DeleteDC(m_hdc); }
 369
 370     operator HDC() const { return m_hdc; }
 371
 372 private:
 373     HDC m_hdc;
 374
 375     DECLARE_NO_COPY_CLASS(MemoryHDC)
 376 };
 377
 378 // a class which selects a GDI object into a DC in its ctor and deselects in
 379 // dtor
 380 class SelectInHDC
 381 {
 382 public:
 383     SelectInHDC(HDC hdc, HGDIOBJ hgdiobj) : m_hdc(hdc)
 384         { m_hgdiobj = ::SelectObject(hdc, hgdiobj); }
 385
 386    ~SelectInHDC() { ::SelectObject(m_hdc, m_hgdiobj); }
 387
 388    // return true if the object was successfully selected
 389    operator bool() const { return m_hgdiobj != 0; }
 390
 391 private:
 392    HDC m_hdc;
 393    HGDIOBJ m_hgdiobj;
 394
 395    DECLARE_NO_COPY_CLASS(SelectInHDC)
 396 };
 397
 398 // a class for temporary bitmaps
 399 class CompatibleBitmap
 400 {
 401 public:
 402     CompatibleBitmap(HDC hdc, int w, int h)
 403     {
 404         m_hbmp = ::CreateCompatibleBitmap(hdc, w, h);
 405     }
 406
 407     ~CompatibleBitmap()
 408     {
 409         if ( m_hbmp )
 410             ::DeleteObject(m_hbmp);
 411     }
 412
 413     operator HBITMAP() const { return m_hbmp; }
 414
 415 private:
 416     HBITMAP m_hbmp;
 417 };
 418
 419 // when working with global pointers (which is unfortunately still necessary
 420 // sometimes, e.g. for clipboard) it is important to unlock them exactly as
 421 // many times as we lock them which just asks for using a "smart lock" class
 422 class GlobalPtr
 423 {
 424 public:
 425     GlobalPtr(HGLOBAL hGlobal) : m_hGlobal(hGlobal)
 426     {
 427         m_ptr = GlobalLock(hGlobal);
 428         if ( !m_ptr )
 429         {
 430             wxLogLastError(_T("GlobalLock"));
 431         }
 432     }
 433
 434     ~GlobalPtr()
 435     {
 436         if ( !GlobalUnlock(m_hGlobal) )
 437         {
 438 #ifdef __WXDEBUG__
 439             // this might happen simply because the block became unlocked
 440             DWORD dwLastError = ::GetLastError();
 441             if ( dwLastError != NO_ERROR )
 442             {
 443                 wxLogApiError(_T("GlobalUnlock"), dwLastError);
 444             }
 445 #endif // __WXDEBUG__
 446         }
 447     }
 448
 449     operator void *() const { return m_ptr; }
 450
 451 private:
 452     HGLOBAL m_hGlobal;
 453     void *m_ptr;
 454
 455     DECLARE_NO_COPY_CLASS(GlobalPtr)
 456 };
 457
 458 // ---------------------------------------------------------------------------
 459 // macros to make casting between WXFOO and FOO a bit easier: the GetFoo()
 460 // returns Foo cast to the Windows type for oruselves, while GetFooOf() takes
 461 // an argument which should be a pointer or reference to the object of the
 462 // corresponding class (this depends on the macro)
 463 // ---------------------------------------------------------------------------
 464
 465 #define GetHwnd()               ((HWND)GetHWND())
 466 #define GetHwndOf(win)          ((HWND)((win)->GetHWND()))
 467 // old name
 468 #define GetWinHwnd              GetHwndOf
 469
 470 #define GetHdc()                ((HDC)GetHDC())
 471 #define GetHdcOf(dc)            ((HDC)(dc).GetHDC())
 472
 473 #define GetHbitmap()            ((HBITMAP)GetHBITMAP())
 474 #define GetHbitmapOf(bmp)       ((HBITMAP)(bmp).GetHBITMAP())
 475
 476 #define GetHicon()              ((HICON)GetHICON())
 477 #define GetHiconOf(icon)        ((HICON)(icon).GetHICON())
 478
 479 #define GetHaccel()             ((HACCEL)GetHACCEL())
 480 #define GetHaccelOf(table)      ((HACCEL)((table).GetHACCEL()))
 481
 482 #define GetHbrush()             ((HPEN)GetResourceHandle())
 483 #define GetHbrushOf(brush)      ((HPEN)(brush).GetResourceHandle())
 484
 485 #define GetHmenu()              ((HMENU)GetHMenu())
 486 #define GetHmenuOf(menu)        ((HMENU)menu->GetHMenu())
 487
 488 #define GetHcursor()            ((HCURSOR)GetHCURSOR())
 489 #define GetHcursorOf(cursor)    ((HCURSOR)(cursor).GetHCURSOR())
 490
 491 #define GetHfont()              ((HFONT)GetHFONT())
 492 #define GetHfontOf(font)        ((HFONT)(font).GetHFONT())
 493
 494 #define GetHpalette()           ((HPALETTE)GetHPALETTE())
 495 #define GetHpaletteOf(pal)      ((HPALETTE)(pal).GetHPALETTE())
 496
 497 #define GetHpen()               ((HPEN)GetResourceHandle())
 498 #define GetHpenOf(pen)          ((HPEN)(pen).GetResourceHandle())
 499
 500 #define GetHrgn()               ((HRGN)GetHRGN())
 501 #define GetHrgnOf(rgn)          ((HRGN)(rgn).GetHRGN())
 502
 503 #endif // wxUSE_GUI
 504
 505 // ---------------------------------------------------------------------------
 506 // global data
 507 // ---------------------------------------------------------------------------
 508
 509 WXDLLIMPEXP_DATA_BASE(extern HINSTANCE) wxhInstance;
 510
 511 // ---------------------------------------------------------------------------
 512 // global functions
 513 // ---------------------------------------------------------------------------
 514
 515 extern "C"
 516 {
 517     WXDLLIMPEXP_BASE HINSTANCE wxGetInstance();
 518 }
 519
 520 WXDLLIMPEXP_BASE void wxSetInstance(HINSTANCE hInst);
 521
 522 // return the full name of the program file
 523 inline wxString wxGetFullModuleName()
 524 {
 525     wxString fullname;
 526     if ( !::GetModuleFileName
 527             (
 528                 (HMODULE)wxGetInstance(),
 529                 wxStringBuffer(fullname, MAX_PATH),
 530                 MAX_PATH
 531             ) )
 532     {
 533         wxLogLastError(_T("GetModuleFileName"));
 534     }
 535
 536     return fullname;
 537 }
 538
 539 #if wxUSE_GUI
 540
 541 // cursor stuff
 542 extern HCURSOR wxGetCurrentBusyCursor();    // from msw/utils.cpp
 543 extern const wxCursor *wxGetGlobalCursor(); // from msw/cursor.cpp
 544
 545 WXDLLEXPORT void wxGetCharSize(WXHWND wnd, int *x, int *y, const wxFont& the_font);
 546 WXDLLEXPORT void wxFillLogFont(LOGFONT *logFont, const wxFont *font);
 547 WXDLLEXPORT wxFont wxCreateFontFromLogFont(const LOGFONT *logFont);
 548 WXDLLEXPORT wxFontEncoding wxGetFontEncFromCharSet(int charset);
 549
 550 WXDLLEXPORT void wxSliderEvent(WXHWND control, WXWORD wParam, WXWORD pos);
 551 WXDLLEXPORT void wxScrollBarEvent(WXHWND hbar, WXWORD wParam, WXWORD pos);
 552
 553 // Find maximum size of window/rectangle
 554 WXDLLEXPORT extern void wxFindMaxSize(WXHWND hwnd, RECT *rect);
 555
 556 // Safely get the window text (i.e. without using fixed size buffer)
 557 WXDLLEXPORT extern wxString wxGetWindowText(WXHWND hWnd);
 558
 559 // get the window class name
 560 WXDLLEXPORT extern wxString wxGetWindowClass(WXHWND hWnd);
 561
 562 // get the window id (should be unsigned, hence this is not wxWindowID which
 563 // is, for mainly historical reasons, signed)
 564 WXDLLEXPORT extern WXWORD wxGetWindowId(WXHWND hWnd);
 565
 566 // check if hWnd's WNDPROC is wndProc. Return true if yes, false if they are
 567 // different
 568 WXDLLEXPORT extern bool wxCheckWindowWndProc(WXHWND hWnd, WXFARPROC wndProc);
 569
 570 // Does this window style specify any border?
 571 inline bool wxStyleHasBorder(long style)
 572 {
 573     return (style & (wxSIMPLE_BORDER | wxRAISED_BORDER |
 574                      wxSUNKEN_BORDER | wxDOUBLE_BORDER)) != 0;
 575 }
 576
 577 // ----------------------------------------------------------------------------
 578 // functions mapping HWND to wxWindow
 579 // ----------------------------------------------------------------------------
 580
 581 // this function simply checks whether the given hWnd corresponds to a wxWindow
 582 // and returns either that window if it does or NULL otherwise
 583 WXDLLEXPORT extern wxWindow* wxFindWinFromHandle(WXHWND hWnd);
 584
 585 // find the window for HWND which is part of some wxWindow, i.e. unlike
 586 // wxFindWinFromHandle() above it will also work for "sub controls" of a
 587 // wxWindow.
 588 //
 589 // returns the wxWindow corresponding to the given HWND or NULL.
 590 WXDLLEXPORT extern wxWindow *wxGetWindowFromHWND(WXHWND hwnd);
 591
 592 // Get the size of an icon
 593 WXDLLEXPORT extern wxSize wxGetHiconSize(HICON hicon);
 594
 595 // Lines are drawn differently for WinCE and regular WIN32
 596 WXDLLEXPORT void wxDrawLine(HDC hdc, int x1, int y1, int x2, int y2);
 597
 598 // ----------------------------------------------------------------------------
 599 // 32/64 bit helpers
 600 // ----------------------------------------------------------------------------
 601
 602 #ifdef __WIN64__
 603
 604 inline void *wxGetWindowProc(HWND hwnd)
 605 {
 606     return (void *)::GetWindowLongPtr(hwnd, GWLP_WNDPROC);
 607 }
 608
 609 inline void *wxGetWindowUserData(HWND hwnd)
 610 {
 611     return (void *)::GetWindowLongPtr(hwnd, GWLP_USERDATA);
 612 }
 613
 614 inline WNDPROC wxSetWindowProc(HWND hwnd, WNDPROC func)
 615 {
 616     return (WNDPROC)::SetWindowLongPtr(hwnd, GWLP_WNDPROC, (LONG_PTR)func);
 617 }
 618
 619 inline void *wxSetWindowUserData(HWND hwnd, void *data)
 620 {
 621     return (void *)::SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)data);
 622 }
 623
 624 #else // __WIN32__
 625
 626 #ifdef __VISUALC__
 627     // strangely enough, VC++ 7.1 gives warnings about 32 -> 64 bit conversions
 628     // in the functions below, even in spite of the explicit casts
 629     #pragma warning(disable:4311)
 630     #pragma warning(disable:4312)
 631 #endif
 632
 633 inline void *wxGetWindowProc(HWND hwnd)
 634 {
 635     return (void *)::GetWindowLong(hwnd, GWL_WNDPROC);
 636 }
 637
 638 inline void *wxGetWindowUserData(HWND hwnd)
 639 {
 640     return (void *)::GetWindowLong(hwnd, GWL_USERDATA);
 641 }
 642
 643 inline WNDPROC wxSetWindowProc(HWND hwnd, WNDPROC func)
 644 {
 645     return (WNDPROC)::SetWindowLong(hwnd, GWL_WNDPROC, (LONG)func);
 646 }
 647
 648 inline void *wxSetWindowUserData(HWND hwnd, void *data)
 649 {
 650     return (void *)::SetWindowLong(hwnd, GWL_USERDATA, (LONG)data);
 651 }
 652
 653 #ifdef __VISUALC__
 654     #pragma warning(default:4311)
 655     #pragma warning(default:4312)
 656 #endif
 657
 658 #endif // __WIN64__/__WIN32__
 659
 660 #endif // wxUSE_GUI
 661
 662 #endif
 663     // _WX_PRIVATE_H_