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