src/msw/toplevel.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/toplevel.cpp
   3 // Purpose:     implements wxTopLevelWindow for MSW
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     24.09.01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2001 SciTech Software, Inc. (www.scitechsoft.com)
   9 // License:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #include "wx/toplevel.h"
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/app.h"
  31     #include "wx/dialog.h"
  32     #include "wx/string.h"
  33     #include "wx/log.h"
  34     #include "wx/intl.h"
  35     #include "wx/frame.h"
  36     #include "wx/containr.h"        // wxSetFocusToChild()
  37     #include "wx/module.h"
  38 #endif //WX_PRECOMP
  39
  40 #include "wx/dynlib.h"
  41
  42 #include "wx/msw/private.h"
  43 #if defined(__WXWINCE__) && !defined(__HANDHELDPC__)
  44     #include <ole2.h>
  45     #include <shellapi.h>
  46     // Standard SDK doesn't have aygshell.dll: see include/wx/msw/wince/libraries.h
  47     #if _WIN32_WCE < 400 || !defined(__WINCE_STANDARDSDK__)
  48         #include <aygshell.h>
  49     #endif
  50 #endif
  51
  52 #include "wx/msw/winundef.h"
  53 #include "wx/msw/missing.h"
  54
  55 #include "wx/display.h"
  56
  57 #ifndef ICON_BIG
  58     #define ICON_BIG 1
  59 #endif
  60
  61 #ifndef ICON_SMALL
  62     #define ICON_SMALL 0
  63 #endif
  64
  65 // ----------------------------------------------------------------------------
  66 // stubs for missing functions under MicroWindows
  67 // ----------------------------------------------------------------------------
  68
  69 #ifdef __WXMICROWIN__
  70
  71 // static inline bool IsIconic(HWND WXUNUSED(hwnd)) { return false; }
  72 static inline bool IsZoomed(HWND WXUNUSED(hwnd)) { return false; }
  73
  74 #endif // __WXMICROWIN__
  75
  76 // NB: wxDlgProc must be defined here and not in dialog.cpp because the latter
  77 //     is not included by wxUniv build which does need wxDlgProc
  78 LONG APIENTRY _EXPORT
  79 wxDlgProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam);
  80
  81 // ----------------------------------------------------------------------------
  82 // globals
  83 // ----------------------------------------------------------------------------
  84
  85 // the name of the default wxWidgets class
  86 #ifdef __WXWINCE__
  87 extern       wxChar *wxCanvasClassName;
  88 #else
  89 extern const wxChar *wxCanvasClassName;
  90 #endif
  91
  92 // ----------------------------------------------------------------------------
  93 // wxTLWHiddenParentModule: used to manage the hidden parent window (we need a
  94 // module to ensure that the window is always deleted)
  95 // ----------------------------------------------------------------------------
  96
  97 class wxTLWHiddenParentModule : public wxModule
  98 {
  99 public:
 100     // module init/finalize
 101     virtual bool OnInit();
 102     virtual void OnExit();
 103
 104     // get the hidden window (creates on demand)
 105     static HWND GetHWND();
 106
 107 private:
 108     // the HWND of the hidden parent
 109     static HWND ms_hwnd;
 110
 111     // the class used to create it
 112     static const wxChar *ms_className;
 113
 114     DECLARE_DYNAMIC_CLASS(wxTLWHiddenParentModule)
 115 };
 116
 117 IMPLEMENT_DYNAMIC_CLASS(wxTLWHiddenParentModule, wxModule)
 118
 119 // ============================================================================
 120 // wxTopLevelWindowMSW implementation
 121 // ============================================================================
 122
 123 BEGIN_EVENT_TABLE(wxTopLevelWindowMSW, wxTopLevelWindowBase)
 124     EVT_ACTIVATE(wxTopLevelWindowMSW::OnActivate)
 125 END_EVENT_TABLE()
 126
 127 // ----------------------------------------------------------------------------
 128 // wxTopLevelWindowMSW creation
 129 // ----------------------------------------------------------------------------
 130
 131 void wxTopLevelWindowMSW::Init()
 132 {
 133     m_iconized =
 134     m_maximizeOnShow = false;
 135
 136     // Data to save/restore when calling ShowFullScreen
 137     m_fsStyle = 0;
 138     m_fsOldWindowStyle = 0;
 139     m_fsIsMaximized = false;
 140     m_fsIsShowing = false;
 141
 142     m_winLastFocused = (wxWindow *)NULL;
 143
 144 #if defined(__SMARTPHONE__) && defined(__WXWINCE__)
 145     m_MenuBarHWND = 0;
 146 #endif
 147
 148 #if defined(__SMARTPHONE__) || defined(__POCKETPC__)
 149     SHACTIVATEINFO* info = new SHACTIVATEINFO;
 150     wxZeroMemory(*info);
 151     info->cbSize = sizeof(SHACTIVATEINFO);
 152
 153     m_activateInfo = (void*) info;
 154 #endif
 155 }
 156
 157 WXDWORD wxTopLevelWindowMSW::MSWGetStyle(long style, WXDWORD *exflags) const
 158 {
 159     // let the base class deal with the common styles but fix the ones which
 160     // don't make sense for us (we also deal with the borders ourselves)
 161     WXDWORD msflags = wxWindow::MSWGetStyle
 162                       (
 163                         (style & ~wxBORDER_MASK) | wxBORDER_NONE, exflags
 164                       ) & ~WS_CHILD & ~WS_VISIBLE;
 165
 166     // For some reason, WS_VISIBLE needs to be defined on creation for
 167     // SmartPhone 2003. The title can fail to be displayed otherwise.
 168 #if defined(__SMARTPHONE__) || (defined(__WXWINCE__) && _WIN32_WCE < 400)
 169     msflags |= WS_VISIBLE;
 170     ((wxTopLevelWindowMSW*)this)->wxWindowBase::Show(true);
 171 #endif
 172
 173     // first select the kind of window being created
 174     //
 175     // note that if we don't set WS_POPUP, Windows assumes WS_OVERLAPPED and
 176     // creates a window with both caption and border, hence we need to use
 177     // WS_POPUP in a few cases just to avoid having caption/border which we
 178     // don't want
 179
 180     // border and caption styles
 181     if ( ( style & wxRESIZE_BORDER ) && !IsAlwaysMaximized())
 182         msflags |= WS_THICKFRAME;
 183     else if ( exflags && ((style & wxBORDER_DOUBLE) || (style & wxBORDER_RAISED)) )
 184         *exflags |= WS_EX_DLGMODALFRAME;
 185     else if ( !(style & wxBORDER_NONE) )
 186         msflags |= WS_BORDER;
 187 #ifndef __POCKETPC__
 188     else
 189         msflags |= WS_POPUP;
 190 #endif
 191
 192     // normally we consider that all windows without a caption must be popups,
 193     // but CE is an exception: there windows normally do not have the caption
 194     // but shouldn't be made popups as popups can't have menus and don't look
 195     // like normal windows anyhow
 196
 197     // TODO: Smartphone appears to like wxCAPTION, but we should check that
 198     // we need it.
 199 #if defined(__SMARTPHONE__) || !defined(__WXWINCE__)
 200     if ( style & wxCAPTION )
 201         msflags |= WS_CAPTION;
 202 #ifndef __WXWINCE__
 203     else
 204         msflags |= WS_POPUP;
 205 #endif // !__WXWINCE__
 206 #endif
 207
 208     // next translate the individual flags
 209
 210     // WS_EX_CONTEXTHELP is incompatible with WS_MINIMIZEBOX and WS_MAXIMIZEBOX
 211     // and is ignored if we specify both of them, but chances are that if we
 212     // use wxWS_EX_CONTEXTHELP, we really do want to have the context help
 213     // button while wxMINIMIZE/wxMAXIMIZE are included by default, so the help
 214     // takes precedence
 215     if ( !(GetExtraStyle() & wxWS_EX_CONTEXTHELP) )
 216     {
 217         if ( style & wxMINIMIZE_BOX )
 218             msflags |= WS_MINIMIZEBOX;
 219         if ( style & wxMAXIMIZE_BOX )
 220             msflags |= WS_MAXIMIZEBOX;
 221     }
 222
 223 #ifndef __WXWINCE__
 224     if ( style & wxSYSTEM_MENU )
 225         msflags |= WS_SYSMENU;
 226 #endif
 227
 228     // NB: under CE these 2 styles are not supported currently, we should
 229     //     call Minimize()/Maximize() "manually" if we want to support them
 230     if ( style & wxMINIMIZE )
 231         msflags |= WS_MINIMIZE;
 232
 233     if ( style & wxMAXIMIZE )
 234         msflags |= WS_MAXIMIZE;
 235
 236     // Keep this here because it saves recoding this function in wxTinyFrame
 237     if ( style & (wxTINY_CAPTION_VERT | wxTINY_CAPTION_HORIZ) )
 238         msflags |= WS_CAPTION;
 239
 240     if ( exflags )
 241     {
 242         // there is no taskbar under CE, so omit all this
 243 #if !defined(__WXWINCE__)
 244         if ( !(GetExtraStyle() & wxTOPLEVEL_EX_DIALOG) )
 245         {
 246             if ( style & wxFRAME_TOOL_WINDOW )
 247             {
 248                 // create the palette-like window
 249                 *exflags |= WS_EX_TOOLWINDOW;
 250
 251                 // tool windows shouldn't appear on the taskbar (as documented)
 252                 style |= wxFRAME_NO_TASKBAR;
 253             }
 254
 255             // We have to solve 2 different problems here:
 256             //
 257             // 1. frames with wxFRAME_NO_TASKBAR flag shouldn't appear in the
 258             //    taskbar even if they don't have a parent
 259             //
 260             // 2. frames without this style should appear in the taskbar even
 261             //    if they're owned (Windows only puts non owned windows into
 262             //    the taskbar normally)
 263             //
 264             // The second one is solved here by using WS_EX_APPWINDOW flag, the
 265             // first one is dealt with in our MSWGetParent() method
 266             // implementation
 267             if ( !(style & wxFRAME_NO_TASKBAR) && GetParent() )
 268             {
 269                 // need to force the frame to appear in the taskbar
 270                 *exflags |= WS_EX_APPWINDOW;
 271             }
 272             //else: nothing to do [here]
 273         }
 274
 275         if ( GetExtraStyle() & wxWS_EX_CONTEXTHELP )
 276             *exflags |= WS_EX_CONTEXTHELP;
 277 #endif // !__WXWINCE__
 278
 279         if ( style & wxSTAY_ON_TOP )
 280             *exflags |= WS_EX_TOPMOST;
 281     }
 282
 283     return msflags;
 284 }
 285
 286 WXHWND wxTopLevelWindowMSW::MSWGetParent() const
 287 {
 288     // for the frames without wxFRAME_FLOAT_ON_PARENT style we should use NULL
 289     // parent HWND or it would be always on top of its parent which is not what
 290     // we usually want (in fact, we only want it for frames with the
 291     // wxFRAME_FLOAT_ON_PARENT flag)
 292     HWND hwndParent = NULL;
 293     if ( HasFlag(wxFRAME_FLOAT_ON_PARENT) )
 294     {
 295         const wxWindow *parent = GetParent();
 296
 297         if ( !parent )
 298         {
 299             // this flag doesn't make sense then and will be ignored
 300             wxFAIL_MSG( _T("wxFRAME_FLOAT_ON_PARENT but no parent?") );
 301         }
 302         else
 303         {
 304             hwndParent = GetHwndOf(parent);
 305         }
 306     }
 307     //else: don't float on parent, must not be owned
 308
 309     // now deal with the 2nd taskbar-related problem (see comments above in
 310     // MSWGetStyle())
 311     if ( HasFlag(wxFRAME_NO_TASKBAR) && !hwndParent )
 312     {
 313         // use hidden parent
 314         hwndParent = wxTLWHiddenParentModule::GetHWND();
 315     }
 316
 317     return (WXHWND)hwndParent;
 318 }
 319
 320 #if defined(__SMARTPHONE__) || defined(__POCKETPC__)
 321 bool wxTopLevelWindowMSW::HandleSettingChange(WXWPARAM wParam, WXLPARAM lParam)
 322 {
 323     SHACTIVATEINFO *info = (SHACTIVATEINFO*) m_activateInfo;
 324     if ( info )
 325     {
 326         SHHandleWMSettingChange(GetHwnd(), wParam, lParam, info);
 327     }
 328
 329     return wxWindowMSW::HandleSettingChange(wParam, lParam);
 330 }
 331 #endif
 332
 333 WXLRESULT wxTopLevelWindowMSW::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 334 {
 335     WXLRESULT rc = 0;
 336     bool processed = false;
 337
 338 #if defined(__SMARTPHONE__) || defined(__POCKETPC__)
 339     switch ( message )
 340     {
 341         case WM_ACTIVATE:
 342         {
 343             SHACTIVATEINFO* info = (SHACTIVATEINFO*) m_activateInfo;
 344             if (info)
 345             {
 346                 DWORD flags = 0;
 347                 if (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG) flags = SHA_INPUTDIALOG;
 348                 SHHandleWMActivate(GetHwnd(), wParam, lParam, info, flags);
 349             }
 350
 351             // This implicitly sends a wxEVT_ACTIVATE_APP event
 352             if (wxTheApp)
 353                 wxTheApp->SetActive(wParam != 0, FindFocus());
 354
 355             break;
 356         }
 357         case WM_HIBERNATE:
 358         {
 359             if (wxTheApp)
 360             {
 361                 wxActivateEvent event(wxEVT_HIBERNATE, true, wxID_ANY);
 362                 event.SetEventObject(wxTheApp);
 363                 processed = wxTheApp->ProcessEvent(event);
 364             }
 365             break;
 366         }
 367     }
 368 #endif
 369
 370     if ( !processed )
 371         rc = wxTopLevelWindowBase::MSWWindowProc(message, wParam, lParam);
 372
 373     return rc;
 374 }
 375
 376 bool wxTopLevelWindowMSW::CreateDialog(const void *dlgTemplate,
 377                                        const wxString& title,
 378                                        const wxPoint& pos,
 379                                        const wxSize& size)
 380 {
 381 #ifdef __WXMICROWIN__
 382     // no dialogs support under MicroWin yet
 383     return CreateFrame(title, pos, size);
 384 #else // !__WXMICROWIN__
 385     wxWindow *parent = GetParent();
 386
 387     // for the dialogs without wxDIALOG_NO_PARENT style, use the top level
 388     // app window as parent - this avoids creating modal dialogs without
 389     // parent
 390     if ( !parent && !(GetWindowStyleFlag() & wxDIALOG_NO_PARENT) )
 391     {
 392         parent = wxTheApp->GetTopWindow();
 393
 394         if ( parent )
 395         {
 396             // don't use transient windows as parents, this is dangerous as it
 397             // can lead to a crash if the parent is destroyed before the child
 398             //
 399             // also don't use the window which is currently hidden as then the
 400             // dialog would be hidden as well
 401             if ( (parent->GetExtraStyle() & wxWS_EX_TRANSIENT) ||
 402                     !parent->IsShown() )
 403             {
 404                 parent = NULL;
 405             }
 406         }
 407     }
 408
 409     m_hWnd = (WXHWND)::CreateDialogIndirect
 410                        (
 411                         wxGetInstance(),
 412                         (DLGTEMPLATE*)dlgTemplate,
 413                         parent ? GetHwndOf(parent) : NULL,
 414                         (DLGPROC)wxDlgProc
 415                        );
 416
 417     if ( !m_hWnd )
 418     {
 419         wxFAIL_MSG(wxT("Failed to create dialog. Incorrect DLGTEMPLATE?"));
 420
 421         wxLogSysError(wxT("Can't create dialog using memory template"));
 422
 423         return false;
 424     }
 425
 426     WXDWORD exflags;
 427     (void)MSWGetCreateWindowFlags(&exflags);
 428
 429     if ( exflags )
 430     {
 431         ::SetWindowLong(GetHwnd(), GWL_EXSTYLE, exflags);
 432         ::SetWindowPos(GetHwnd(),
 433                        exflags & WS_EX_TOPMOST ? HWND_TOPMOST : 0,
 434                        0, 0, 0, 0,
 435                        SWP_NOSIZE |
 436                        SWP_NOMOVE |
 437                        (exflags & WS_EX_TOPMOST ? 0 : SWP_NOZORDER) |
 438                        SWP_NOACTIVATE);
 439     }
 440
 441 #if !defined(__WXWINCE__)
 442     // For some reason, the system menu is activated when we use the
 443     // WS_EX_CONTEXTHELP style, so let's set a reasonable icon
 444     if ( exflags & WS_EX_CONTEXTHELP )
 445     {
 446         wxFrame *winTop = wxDynamicCast(wxTheApp->GetTopWindow(), wxFrame);
 447         if ( winTop )
 448         {
 449             wxIcon icon = winTop->GetIcon();
 450             if ( icon.Ok() )
 451             {
 452                 ::SendMessage(GetHwnd(), WM_SETICON,
 453                               (WPARAM)TRUE,
 454                               (LPARAM)GetHiconOf(icon));
 455             }
 456         }
 457     }
 458 #endif
 459
 460     // move the dialog to its initial position without forcing repainting
 461     int x, y, w, h;
 462     (void)MSWGetCreateWindowCoords(pos, size, x, y, w, h);
 463
 464     if ( x == (int)CW_USEDEFAULT )
 465     {
 466         // centre it on the screen - what else can we do?
 467         wxSize sizeDpy = wxGetDisplaySize();
 468
 469         x = (sizeDpy.x - w) / 2;
 470         y = (sizeDpy.y - h) / 2;
 471     }
 472
 473 #if !defined(__WXWINCE__) || defined(__WINCE_STANDARDSDK__)
 474     if ( !::MoveWindow(GetHwnd(), x, y, w, h, FALSE) )
 475     {
 476         wxLogLastError(wxT("MoveWindow"));
 477     }
 478 #endif
 479
 480     if ( !title.empty() )
 481     {
 482         ::SetWindowText(GetHwnd(), title);
 483     }
 484
 485     SubclassWin(m_hWnd);
 486
 487 #ifdef __SMARTPHONE__
 488     // Work around title non-display glitch
 489     Show(false);
 490 #endif
 491
 492     return true;
 493 #endif // __WXMICROWIN__/!__WXMICROWIN__
 494 }
 495
 496 bool wxTopLevelWindowMSW::CreateFrame(const wxString& title,
 497                                       const wxPoint& pos,
 498                                       const wxSize& size)
 499 {
 500     WXDWORD exflags;
 501     WXDWORD flags = MSWGetCreateWindowFlags(&exflags);
 502
 503     const wxSize sz = IsAlwaysMaximized() ? wxDefaultSize : size;
 504
 505 #ifndef __WXWINCE__
 506     if ( wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft )
 507         exflags |= WS_EX_LAYOUTRTL;
 508 #endif
 509
 510     return MSWCreate(wxCanvasClassName, title, pos, sz, flags, exflags);
 511 }
 512
 513 bool wxTopLevelWindowMSW::Create(wxWindow *parent,
 514                                  wxWindowID id,
 515                                  const wxString& title,
 516                                  const wxPoint& pos,
 517                                  const wxSize& size,
 518                                  long style,
 519                                  const wxString& name)
 520 {
 521     bool ret wxDUMMY_INITIALIZE(false);
 522
 523     // init our fields
 524     Init();
 525
 526     wxSize sizeReal = size;
 527     if ( !sizeReal.IsFullySpecified() )
 528     {
 529         sizeReal.SetDefaults(GetDefaultSize());
 530     }
 531
 532     m_windowStyle = style;
 533
 534     SetName(name);
 535
 536     m_windowId = id == wxID_ANY ? NewControlId() : id;
 537
 538     wxTopLevelWindows.Append(this);
 539
 540     if ( parent )
 541         parent->AddChild(this);
 542
 543     if ( GetExtraStyle() & wxTOPLEVEL_EX_DIALOG )
 544     {
 545         // we have different dialog templates to allows creation of dialogs
 546         // with & without captions under MSWindows, resizeable or not (but a
 547         // resizeable dialog always has caption - otherwise it would look too
 548         // strange)
 549
 550         // we need 3 additional WORDs for dialog menu, class and title (as we
 551         // don't use DS_SETFONT we don't need the fourth WORD for the font)
 552         static const int dlgsize = sizeof(DLGTEMPLATE) + (sizeof(WORD) * 3);
 553         DLGTEMPLATE *dlgTemplate = (DLGTEMPLATE *)malloc(dlgsize);
 554         memset(dlgTemplate, 0, dlgsize);
 555
 556         // these values are arbitrary, they won't be used normally anyhow
 557         dlgTemplate->x  = 34;
 558         dlgTemplate->y  = 22;
 559         dlgTemplate->cx = 144;
 560         dlgTemplate->cy = 75;
 561
 562         // reuse the code in MSWGetStyle() but correct the results slightly for
 563         // the dialog
 564         dlgTemplate->style = MSWGetStyle(style, NULL);
 565
 566         // all dialogs are popups
 567         dlgTemplate->style |= WS_POPUP;
 568
 569 #ifndef __WXWINCE__
 570         if ( wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft )
 571         {
 572             dlgTemplate->dwExtendedStyle |= WS_EX_LAYOUTRTL;
 573         }
 574
 575         // force 3D-look if necessary, it looks impossibly ugly otherwise
 576         if ( style & (wxRESIZE_BORDER | wxCAPTION) )
 577             dlgTemplate->style |= DS_MODALFRAME;
 578 #endif
 579
 580         ret = CreateDialog(dlgTemplate, title, pos, sizeReal);
 581         free(dlgTemplate);
 582     }
 583     else // !dialog
 584     {
 585         ret = CreateFrame(title, pos, sizeReal);
 586     }
 587
 588 #ifndef __WXWINCE__
 589     if ( ret && !(GetWindowStyleFlag() & wxCLOSE_BOX) )
 590     {
 591         EnableCloseButton(false);
 592     }
 593 #endif
 594
 595     // for standard dialogs the dialog manager generates WM_CHANGEUISTATE
 596     // itself but for custom windows we have to do it ourselves in order to
 597     // make the keyboard indicators (such as underlines for accelerators and
 598     // focus rectangles) work under Win2k+
 599     if ( ret )
 600     {
 601         MSWUpdateUIState(UIS_INITIALIZE);
 602     }
 603
 604     // Note: if we include PocketPC in this test, dialogs can fail to show up,
 605     // for example the text entry dialog in the dialogs sample. Problem with Maximise()?
 606 #if defined(__WXWINCE__) && (defined(__SMARTPHONE__) || defined(__WINCE_STANDARDSDK__))
 607     if ( ( style & wxMAXIMIZE ) || IsAlwaysMaximized() )
 608     {
 609         this->Maximize();
 610     }
 611 #endif
 612
 613 #if defined(__SMARTPHONE__) && defined(__WXWINCE__)
 614     SetRightMenu(); // to nothing for initialization
 615 #endif
 616
 617     return ret;
 618 }
 619
 620 wxTopLevelWindowMSW::~wxTopLevelWindowMSW()
 621 {
 622 #if defined(__SMARTPHONE__) || defined(__POCKETPC__)
 623     SHACTIVATEINFO* info = (SHACTIVATEINFO*) m_activateInfo;
 624     delete info;
 625     m_activateInfo = NULL;
 626 #endif
 627
 628     // after destroying an owned window, Windows activates the next top level
 629     // window in Z order but it may be different from our owner (to reproduce
 630     // this simply Alt-TAB to another application and back before closing the
 631     // owned frame) whereas we always want to yield activation to our parent
 632     if ( HasFlag(wxFRAME_FLOAT_ON_PARENT) )
 633     {
 634         wxWindow *parent = GetParent();
 635         if ( parent )
 636         {
 637             ::BringWindowToTop(GetHwndOf(parent));
 638         }
 639     }
 640 }
 641
 642 // ----------------------------------------------------------------------------
 643 // wxTopLevelWindowMSW showing
 644 // ----------------------------------------------------------------------------
 645
 646 void wxTopLevelWindowMSW::DoShowWindow(int nShowCmd)
 647 {
 648     ::ShowWindow(GetHwnd(), nShowCmd);
 649
 650     m_iconized = nShowCmd == SW_MINIMIZE;
 651 }
 652
 653 bool wxTopLevelWindowMSW::Show(bool show)
 654 {
 655     // don't use wxWindow version as we want to call DoShowWindow() ourselves
 656     if ( !wxWindowBase::Show(show) )
 657         return false;
 658
 659     int nShowCmd;
 660     if ( show )
 661     {
 662         if ( m_maximizeOnShow )
 663         {
 664             // show and maximize
 665             nShowCmd = SW_MAXIMIZE;
 666
 667             // This is necessary, or no window appears
 668 #if defined( __WINCE_STANDARDSDK__) || defined(__SMARTPHONE__)
 669             DoShowWindow(SW_SHOW);
 670 #endif
 671
 672             m_maximizeOnShow = false;
 673         }
 674         else // just show
 675         {
 676            if ( GetWindowStyle() & wxFRAME_TOOL_WINDOW )
 677                nShowCmd = SW_SHOWNA;
 678            else
 679                nShowCmd = SW_SHOW;
 680         }
 681     }
 682     else // hide
 683     {
 684         nShowCmd = SW_HIDE;
 685     }
 686
 687     DoShowWindow(nShowCmd);
 688
 689 #if defined(__WXWINCE__) && (_WIN32_WCE >= 400 && !defined(__POCKETPC__) && !defined(__SMARTPHONE__))
 690     // Addornments have to be added when the frame is the correct size
 691     wxFrame* frame = wxDynamicCast(this, wxFrame);
 692     if (frame && frame->GetMenuBar())
 693         frame->GetMenuBar()->AddAdornments(GetWindowStyleFlag());
 694 #endif
 695
 696     // we only set pending size if we're maximized before being shown, now that
 697     // we're shown we don't need it any more (it is reset in size event handler
 698     // for child windows but we have to do it ourselves for this parent window)
 699     m_pendingSize = wxDefaultSize;
 700
 701     return true;
 702 }
 703
 704 // ----------------------------------------------------------------------------
 705 // wxTopLevelWindowMSW maximize/minimize
 706 // ----------------------------------------------------------------------------
 707
 708 void wxTopLevelWindowMSW::Maximize(bool maximize)
 709 {
 710     if ( IsShown() )
 711     {
 712         // just maximize it directly
 713         DoShowWindow(maximize ? SW_MAXIMIZE : SW_RESTORE);
 714     }
 715     else // hidden
 716     {
 717         // we can't maximize the hidden frame because it shows it as well,
 718         // so just remember that we should do it later in this case
 719         m_maximizeOnShow = maximize;
 720
 721         // after calling Maximize() the client code expects to get the frame
 722         // "real" size and doesn't want to know that, because of implementation
 723         // details, the frame isn't really maximized yet but will be only once
 724         // it's shown, so return our size as it will be then in this case
 725         if ( maximize )
 726         {
 727             // we must only change pending size here, and not call SetSize()
 728             // because otherwise Windows would think that this (full screen)
 729             // size is the natural size for the frame and so would use it when
 730             // the user clicks on "restore" title bar button instead of the
 731             // correct initial frame size
 732             //
 733             // NB: unfortunately we don't know which display we're on yet so we
 734             //     have to use the default one
 735             m_pendingSize = wxGetClientDisplayRect().GetSize();
 736         }
 737         //else: can't do anything in this case, we don't have the old size
 738     }
 739 }
 740
 741 bool wxTopLevelWindowMSW::IsMaximized() const
 742 {
 743     return IsAlwaysMaximized() ||
 744 #if !defined(__SMARTPHONE__) && !defined(__POCKETPC__)
 745            (::IsZoomed(GetHwnd()) != 0) ||
 746 #endif
 747            m_maximizeOnShow;
 748 }
 749
 750 void wxTopLevelWindowMSW::Iconize(bool iconize)
 751 {
 752     DoShowWindow(iconize ? SW_MINIMIZE : SW_RESTORE);
 753 }
 754
 755 bool wxTopLevelWindowMSW::IsIconized() const
 756 {
 757 #ifdef __WXWINCE__
 758     return false;
 759 #else
 760     // don't use m_iconized, it may be briefly out of sync with the real state
 761     // as it's only modified when we receive a WM_SIZE and we could be called
 762     // from an event handler from one of the messages we receive before it,
 763     // such as WM_MOVE
 764     return ::IsIconic(GetHwnd()) != 0;
 765 #endif
 766 }
 767
 768 void wxTopLevelWindowMSW::Restore()
 769 {
 770     DoShowWindow(SW_RESTORE);
 771 }
 772
 773 void wxTopLevelWindowMSW::SetLayoutDirection(wxLayoutDirection dir)
 774 {
 775     if ( dir == wxLayout_Default )
 776         dir = wxTheApp->GetLayoutDirection();
 777
 778     if ( dir != wxLayout_Default )
 779         wxTopLevelWindowBase::SetLayoutDirection(dir);
 780 }
 781
 782 // ----------------------------------------------------------------------------
 783 // wxTopLevelWindowMSW geometry
 784 // ----------------------------------------------------------------------------
 785
 786 #ifndef __WXWINCE__
 787
 788 void wxTopLevelWindowMSW::DoGetPosition(int *x, int *y) const
 789 {
 790     if ( IsIconized() )
 791     {
 792         WINDOWPLACEMENT wp;
 793         wp.length = sizeof(WINDOWPLACEMENT);
 794         if ( ::GetWindowPlacement(GetHwnd(), &wp) )
 795         {
 796             RECT& rc = wp.rcNormalPosition;
 797
 798             // the position returned by GetWindowPlacement() is in workspace
 799             // coordinates except for windows with WS_EX_TOOLWINDOW style
 800             if ( !HasFlag(wxFRAME_TOOL_WINDOW) )
 801             {
 802                 // we must use the correct display for the translation as the
 803                 // task bar might be shown on one display but not the other one
 804                 int n = wxDisplay::GetFromWindow(this);
 805                 wxDisplay dpy(n == wxNOT_FOUND ? 0 : n);
 806                 const wxPoint ptOfs = dpy.GetClientArea().GetPosition() -
 807                                       dpy.GetGeometry().GetPosition();
 808
 809                 rc.left += ptOfs.x;
 810                 rc.top += ptOfs.y;
 811             }
 812
 813             if ( x )
 814                 *x = rc.left;
 815             if ( y )
 816                 *y = rc.top;
 817
 818             return;
 819         }
 820
 821         wxLogLastError(_T("GetWindowPlacement"));
 822     }
 823     //else: normal case
 824
 825     wxTopLevelWindowBase::DoGetPosition(x, y);
 826 }
 827
 828 void wxTopLevelWindowMSW::DoGetSize(int *width, int *height) const
 829 {
 830     if ( IsIconized() )
 831     {
 832         WINDOWPLACEMENT wp;
 833         wp.length = sizeof(WINDOWPLACEMENT);
 834         if ( ::GetWindowPlacement(GetHwnd(), &wp) )
 835         {
 836             const RECT& rc = wp.rcNormalPosition;
 837
 838             if ( width )
 839                 *width = rc.right - rc.left;
 840             if ( height )
 841                 *height = rc.bottom - rc.top;
 842
 843             return;
 844         }
 845
 846         wxLogLastError(_T("GetWindowPlacement"));
 847     }
 848     //else: normal case
 849
 850     wxTopLevelWindowBase::DoGetSize(width, height);
 851 }
 852
 853 #endif // __WXWINCE__
 854
 855 // ----------------------------------------------------------------------------
 856 // wxTopLevelWindowMSW fullscreen
 857 // ----------------------------------------------------------------------------
 858
 859 bool wxTopLevelWindowMSW::ShowFullScreen(bool show, long style)
 860 {
 861     if ( show == IsFullScreen() )
 862     {
 863         // nothing to do
 864         return true;
 865     }
 866
 867     m_fsIsShowing = show;
 868
 869     if ( show )
 870     {
 871         m_fsStyle = style;
 872
 873         // zap the frame borders
 874
 875         // save the 'normal' window style
 876         m_fsOldWindowStyle = GetWindowLong(GetHwnd(), GWL_STYLE);
 877
 878         // save the old position, width & height, maximize state
 879         m_fsOldSize = GetRect();
 880         m_fsIsMaximized = IsMaximized();
 881
 882         // decide which window style flags to turn off
 883         LONG newStyle = m_fsOldWindowStyle;
 884         LONG offFlags = 0;
 885
 886         if (style & wxFULLSCREEN_NOBORDER)
 887         {
 888             offFlags |= WS_BORDER;
 889 #ifndef __WXWINCE__
 890             offFlags |= WS_THICKFRAME;
 891 #endif
 892         }
 893         if (style & wxFULLSCREEN_NOCAPTION)
 894             offFlags |= WS_CAPTION | WS_SYSMENU;
 895
 896         newStyle &= ~offFlags;
 897
 898         // change our window style to be compatible with full-screen mode
 899         ::SetWindowLong(GetHwnd(), GWL_STYLE, newStyle);
 900
 901         wxRect rect;
 902 #if wxUSE_DISPLAY
 903         // resize to the size of the display containing us
 904         int dpy = wxDisplay::GetFromWindow(this);
 905         if ( dpy != wxNOT_FOUND )
 906         {
 907             rect = wxDisplay(dpy).GetGeometry();
 908         }
 909         else // fall back to the main desktop
 910 #endif // wxUSE_DISPLAY
 911         {
 912             // resize to the size of the desktop
 913             wxCopyRECTToRect(wxGetWindowRect(::GetDesktopWindow()), rect);
 914 #ifdef __WXWINCE__
 915             // FIXME: size of the bottom menu (toolbar)
 916             // should be taken in account
 917             rect.height += rect.y;
 918             rect.y       = 0;
 919 #endif
 920         }
 921
 922         SetSize(rect);
 923
 924         // now flush the window style cache and actually go full-screen
 925         long flags = SWP_FRAMECHANGED;
 926
 927         // showing the frame full screen should also show it if it's still
 928         // hidden
 929         if ( !IsShown() )
 930         {
 931             // don't call wxWindow version to avoid flicker from calling
 932             // ::ShowWindow() -- we're going to show the window at the correct
 933             // location directly below -- but do call the wxWindowBase version
 934             // to sync the internal m_isShown flag
 935             wxWindowBase::Show();
 936
 937             flags |= SWP_SHOWWINDOW;
 938         }
 939
 940         SetWindowPos(GetHwnd(), HWND_TOP,
 941                      rect.x, rect.y, rect.width, rect.height,
 942                      flags);
 943
 944 #if !defined(__HANDHELDPC__) && (defined(__WXWINCE__) && (_WIN32_WCE < 400))
 945         ::SHFullScreen(GetHwnd(), SHFS_HIDETASKBAR | SHFS_HIDESIPBUTTON);
 946 #endif
 947
 948         // finally send an event allowing the window to relayout itself &c
 949         wxSizeEvent event(rect.GetSize(), GetId());
 950         GetEventHandler()->ProcessEvent(event);
 951     }
 952     else // stop showing full screen
 953     {
 954 #if !defined(__HANDHELDPC__) && (defined(__WXWINCE__) && (_WIN32_WCE < 400))
 955         ::SHFullScreen(GetHwnd(), SHFS_SHOWTASKBAR | SHFS_SHOWSIPBUTTON);
 956 #endif
 957         Maximize(m_fsIsMaximized);
 958         SetWindowLong(GetHwnd(),GWL_STYLE, m_fsOldWindowStyle);
 959         SetWindowPos(GetHwnd(),HWND_TOP,m_fsOldSize.x, m_fsOldSize.y,
 960             m_fsOldSize.width, m_fsOldSize.height, SWP_FRAMECHANGED);
 961     }
 962
 963     return true;
 964 }
 965
 966 // ----------------------------------------------------------------------------
 967 // wxTopLevelWindowMSW misc
 968 // ----------------------------------------------------------------------------
 969
 970 void wxTopLevelWindowMSW::SetTitle( const wxString& title)
 971 {
 972     SetLabel(title);
 973 }
 974
 975 wxString wxTopLevelWindowMSW::GetTitle() const
 976 {
 977     return GetLabel();
 978 }
 979
 980 void wxTopLevelWindowMSW::SetIcons(const wxIconBundle& icons)
 981 {
 982     wxTopLevelWindowBase::SetIcons(icons);
 983
 984 #if !defined(__WXMICROWIN__)
 985     const wxIcon& sml = icons.GetIconOfExactSize(16);
 986     if( sml.Ok() )
 987     {
 988         ::SendMessage( GetHwndOf( this ), WM_SETICON, ICON_SMALL,
 989                        (LPARAM)GetHiconOf(sml) );
 990     }
 991
 992     const wxIcon& big = icons.GetIconOfExactSize(32);
 993     if( big.Ok() )
 994     {
 995         ::SendMessage( GetHwndOf( this ), WM_SETICON, ICON_BIG,
 996                        (LPARAM)GetHiconOf(big) );
 997     }
 998 #endif // !__WXMICROWIN__
 999 }
1000
1001 bool wxTopLevelWindowMSW::EnableCloseButton(bool enable)
1002 {
1003 #if !defined(__WXMICROWIN__)
1004     // get system (a.k.a. window) menu
1005     HMENU hmenu = GetSystemMenu(GetHwnd(), FALSE /* get it */);
1006     if ( !hmenu )
1007     {
1008         // no system menu at all -- ok if we want to remove the close button
1009         // anyhow, but bad if we want to show it
1010         return !enable;
1011     }
1012
1013     // enabling/disabling the close item from it also automatically
1014     // disables/enables the close title bar button
1015     if ( ::EnableMenuItem(hmenu, SC_CLOSE,
1016                           MF_BYCOMMAND |
1017                           (enable ? MF_ENABLED : MF_GRAYED)) == -1 )
1018     {
1019         wxLogLastError(_T("EnableMenuItem(SC_CLOSE)"));
1020
1021         return false;
1022     }
1023 #ifndef __WXWINCE__
1024     // update appearance immediately
1025     if ( !::DrawMenuBar(GetHwnd()) )
1026     {
1027         wxLogLastError(_T("DrawMenuBar"));
1028     }
1029 #endif
1030 #endif // !__WXMICROWIN__
1031
1032     return true;
1033 }
1034
1035 #ifndef __WXWINCE__
1036
1037 bool wxTopLevelWindowMSW::SetShape(const wxRegion& region)
1038 {
1039     wxCHECK_MSG( HasFlag(wxFRAME_SHAPED), false,
1040                  _T("Shaped windows must be created with the wxFRAME_SHAPED style."));
1041
1042     // The empty region signifies that the shape should be removed from the
1043     // window.
1044     if ( region.IsEmpty() )
1045     {
1046         if (::SetWindowRgn(GetHwnd(), NULL, TRUE) == 0)
1047         {
1048             wxLogLastError(_T("SetWindowRgn"));
1049             return false;
1050         }
1051         return true;
1052     }
1053
1054     // Windows takes ownership of the region, so
1055     // we'll have to make a copy of the region to give to it.
1056     DWORD noBytes = ::GetRegionData(GetHrgnOf(region), 0, NULL);
1057     RGNDATA *rgnData = (RGNDATA*) new char[noBytes];
1058     ::GetRegionData(GetHrgnOf(region), noBytes, rgnData);
1059     HRGN hrgn = ::ExtCreateRegion(NULL, noBytes, rgnData);
1060     delete[] (char*) rgnData;
1061
1062     // SetWindowRgn expects the region to be in coordinants
1063     // relative to the window, not the client area.  Figure
1064     // out the offset, if any.
1065     RECT rect;
1066     DWORD dwStyle =   ::GetWindowLong(GetHwnd(), GWL_STYLE);
1067     DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
1068     ::GetClientRect(GetHwnd(), &rect);
1069     ::AdjustWindowRectEx(&rect, dwStyle, FALSE, dwExStyle);
1070     ::OffsetRgn(hrgn, -rect.left, -rect.top);
1071
1072     // Now call the shape API with the new region.
1073     if (::SetWindowRgn(GetHwnd(), hrgn, TRUE) == 0)
1074     {
1075         wxLogLastError(_T("SetWindowRgn"));
1076         return false;
1077     }
1078     return true;
1079 }
1080
1081 #endif // !__WXWINCE__
1082
1083 void wxTopLevelWindowMSW::RequestUserAttention(int flags)
1084 {
1085     // check if we can use FlashWindowEx(): unfortunately a simple test for
1086     // FLASHW_STOP doesn't work because MSVC6 headers do #define it but don't
1087     // provide FlashWindowEx() declaration, so try to detect whether we have
1088     // real headers for WINVER 0x0500 by checking for existence of a symbol not
1089     // declated in MSVC6 header
1090 #if defined(FLASHW_STOP) && defined(VK_XBUTTON1)
1091     // available in the headers, check if it is supported by the system
1092     typedef BOOL (WINAPI *FlashWindowEx_t)(FLASHWINFO *pfwi);
1093     FlashWindowEx_t s_pfnFlashWindowEx = NULL;
1094     if ( !s_pfnFlashWindowEx )
1095     {
1096         wxDynamicLibrary dllUser32(_T("user32.dll"));
1097         s_pfnFlashWindowEx = (FlashWindowEx_t)
1098                                 dllUser32.GetSymbol(_T("FlashWindowEx"));
1099
1100         // we can safely unload user32.dll here, it's going to remain loaded as
1101         // long as the program is running anyhow
1102     }
1103
1104     if ( s_pfnFlashWindowEx )
1105     {
1106         WinStruct<FLASHWINFO> fwi;
1107         fwi.hwnd = GetHwnd();
1108         fwi.dwFlags = FLASHW_ALL;
1109         if ( flags & wxUSER_ATTENTION_INFO )
1110         {
1111             // just flash a few times
1112             fwi.uCount = 3;
1113         }
1114         else // wxUSER_ATTENTION_ERROR
1115         {
1116             // flash until the user notices it
1117             fwi.dwFlags |= FLASHW_TIMERNOFG;
1118         }
1119
1120         s_pfnFlashWindowEx(&fwi);
1121     }
1122     else // FlashWindowEx() not available
1123 #endif // FlashWindowEx() defined
1124     {
1125         wxUnusedVar(flags);
1126 #ifndef __WXWINCE__
1127         ::FlashWindow(GetHwnd(), TRUE);
1128 #endif // __WXWINCE__
1129     }
1130 }
1131
1132 // ---------------------------------------------------------------------------
1133
1134 bool wxTopLevelWindowMSW::SetTransparent(wxByte alpha)
1135 {
1136     typedef DWORD (WINAPI *PSETLAYEREDWINDOWATTR)(HWND, DWORD, BYTE, DWORD);
1137     static PSETLAYEREDWINDOWATTR pSetLayeredWindowAttributes = NULL;
1138
1139     if ( pSetLayeredWindowAttributes == NULL )
1140     {
1141         wxDynamicLibrary dllUser32(_T("user32.dll"));
1142         pSetLayeredWindowAttributes = (PSETLAYEREDWINDOWATTR)
1143             dllUser32.GetSymbol(wxT("SetLayeredWindowAttributes"));
1144     }
1145     if ( pSetLayeredWindowAttributes == NULL )
1146         return false;
1147
1148     LONG exstyle = GetWindowLong(GetHwnd(), GWL_EXSTYLE);
1149
1150     // if setting alpha to fully opaque then turn off the layered style
1151     if (alpha == 255)
1152     {
1153         SetWindowLong(GetHwnd(), GWL_EXSTYLE, exstyle & ~WS_EX_LAYERED);
1154         Refresh();
1155         return true;
1156     }
1157
1158     // Otherwise, set the layered style if needed and set the alpha value
1159     if ((exstyle & WS_EX_LAYERED) == 0 )
1160         SetWindowLong(GetHwnd(), GWL_EXSTYLE, exstyle | WS_EX_LAYERED);
1161
1162     return pSetLayeredWindowAttributes(GetHwnd(), 0, (BYTE)alpha, LWA_ALPHA) != 0;
1163 }
1164
1165 bool wxTopLevelWindowMSW::CanSetTransparent()
1166 {
1167     // The API is available on win2k and above
1168
1169     static int os_type = -1;
1170     static int ver_major = -1;
1171
1172     if (os_type == -1)
1173         os_type = ::wxGetOsVersion(&ver_major);
1174
1175     return (os_type == wxOS_WINDOWS_NT && ver_major >= 5);
1176 }
1177
1178 // ----------------------------------------------------------------------------
1179 // wxTopLevelWindow event handling
1180 // ----------------------------------------------------------------------------
1181
1182 // Default activation behaviour - set the focus for the first child
1183 // subwindow found.
1184 void wxTopLevelWindowMSW::OnActivate(wxActivateEvent& event)
1185 {
1186     if ( event.GetActive() )
1187     {
1188         // restore focus to the child which was last focused unless we already
1189         // have it
1190         wxLogTrace(_T("focus"), _T("wxTLW %08x activated."), (int) m_hWnd);
1191
1192         wxWindow *winFocus = FindFocus();
1193         if ( !winFocus || wxGetTopLevelParent(winFocus) != this )
1194         {
1195             wxWindow *parent = m_winLastFocused ? m_winLastFocused->GetParent()
1196                                                 : NULL;
1197             if ( !parent )
1198             {
1199                 parent = this;
1200             }
1201
1202             wxSetFocusToChild(parent, &m_winLastFocused);
1203         }
1204     }
1205     else // deactivating
1206     {
1207         // remember the last focused child if it is our child
1208         m_winLastFocused = FindFocus();
1209
1210         if ( m_winLastFocused )
1211         {
1212             // let it know that it doesn't have focus any more
1213             m_winLastFocused->HandleKillFocus((WXHWND)NULL);
1214
1215             // and don't remember it if it's a child from some other frame
1216             if ( wxGetTopLevelParent(m_winLastFocused) != this )
1217             {
1218                 m_winLastFocused = NULL;
1219             }
1220         }
1221
1222         wxLogTrace(_T("focus"),
1223                    _T("wxTLW %08x deactivated, last focused: %08x."),
1224                    (int) m_hWnd,
1225                    (int) (m_winLastFocused ? GetHwndOf(m_winLastFocused)
1226                                            : NULL));
1227
1228         event.Skip();
1229     }
1230 }
1231
1232 // the DialogProc for all wxWidgets dialogs
1233 LONG APIENTRY _EXPORT
1234 wxDlgProc(HWND hDlg,
1235           UINT message,
1236           WPARAM WXUNUSED(wParam),
1237           LPARAM WXUNUSED(lParam))
1238 {
1239     switch ( message )
1240     {
1241         case WM_INITDIALOG:
1242         {
1243             // under CE, add a "Ok" button in the dialog title bar and make it full
1244             // screen
1245             //
1246             // TODO: find the window for this HWND, and take into account
1247             // wxMAXIMIZE and wxCLOSE_BOX. For now, assume both are present.
1248             //
1249             // Standard SDK doesn't have aygshell.dll: see
1250             // include/wx/msw/wince/libraries.h
1251 #if defined(__WXWINCE__) && !defined(__WINCE_STANDARDSDK__) && !defined(__HANDHELDPC__)
1252             SHINITDLGINFO shidi;
1253             shidi.dwMask = SHIDIM_FLAGS;
1254             shidi.dwFlags = SHIDIF_SIZEDLG // take account of the SIP or menubar
1255 #ifndef __SMARTPHONE__
1256                             | SHIDIF_DONEBUTTON
1257 #endif
1258                         ;
1259             shidi.hDlg = hDlg;
1260             SHInitDialog( &shidi );
1261 #else // no SHInitDialog()
1262             wxUnusedVar(hDlg);
1263 #endif
1264             // for WM_INITDIALOG, returning TRUE tells system to set focus to
1265             // the first control in the dialog box, but as we set the focus
1266             // ourselves, we return FALSE for it as well
1267             return FALSE;
1268         }
1269     }
1270
1271     // for almost all messages, returning FALSE means that we didn't process
1272     // the message
1273     return FALSE;
1274 }
1275
1276 // ============================================================================
1277 // wxTLWHiddenParentModule implementation
1278 // ============================================================================
1279
1280 HWND wxTLWHiddenParentModule::ms_hwnd = NULL;
1281
1282 const wxChar *wxTLWHiddenParentModule::ms_className = NULL;
1283
1284 bool wxTLWHiddenParentModule::OnInit()
1285 {
1286     ms_hwnd = NULL;
1287     ms_className = NULL;
1288
1289     return true;
1290 }
1291
1292 void wxTLWHiddenParentModule::OnExit()
1293 {
1294     if ( ms_hwnd )
1295     {
1296         if ( !::DestroyWindow(ms_hwnd) )
1297         {
1298             wxLogLastError(_T("DestroyWindow(hidden TLW parent)"));
1299         }
1300
1301         ms_hwnd = NULL;
1302     }
1303
1304     if ( ms_className )
1305     {
1306         if ( !::UnregisterClass(ms_className, wxGetInstance()) )
1307         {
1308             wxLogLastError(_T("UnregisterClass(\"wxTLWHiddenParent\")"));
1309         }
1310
1311         ms_className = NULL;
1312     }
1313 }
1314
1315 /* static */
1316 HWND wxTLWHiddenParentModule::GetHWND()
1317 {
1318     if ( !ms_hwnd )
1319     {
1320         if ( !ms_className )
1321         {
1322             static const wxChar *HIDDEN_PARENT_CLASS = _T("wxTLWHiddenParent");
1323
1324             WNDCLASS wndclass;
1325             wxZeroMemory(wndclass);
1326
1327             wndclass.lpfnWndProc   = DefWindowProc;
1328             wndclass.hInstance     = wxGetInstance();
1329             wndclass.lpszClassName = HIDDEN_PARENT_CLASS;
1330
1331             if ( !::RegisterClass(&wndclass) )
1332             {
1333                 wxLogLastError(_T("RegisterClass(\"wxTLWHiddenParent\")"));
1334             }
1335             else
1336             {
1337                 ms_className = HIDDEN_PARENT_CLASS;
1338             }
1339         }
1340
1341         ms_hwnd = ::CreateWindow(ms_className, wxEmptyString, 0, 0, 0, 0, 0, NULL,
1342                                  (HMENU)NULL, wxGetInstance(), NULL);
1343         if ( !ms_hwnd )
1344         {
1345             wxLogLastError(_T("CreateWindow(hidden TLW parent)"));
1346         }
1347     }
1348
1349     return ms_hwnd;
1350 }