src/msw/mdi.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/mdi.cpp
   3 // Purpose:     MDI classes for wxMSW
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin on 2008-11-04 to use the base classes
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Julian Smart
   9 //              (c) 2008-2009 Vadim Zeitlin
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 // ===========================================================================
  14 // declarations
  15 // ===========================================================================
  16
  17 // ---------------------------------------------------------------------------
  18 // headers
  19 // ---------------------------------------------------------------------------
  20
  21 // For compilers that support precompilation, includes "wx.h".
  22 #include "wx/wxprec.h"
  23
  24 #ifdef __BORLANDC__
  25     #pragma hdrstop
  26 #endif
  27
  28 #if wxUSE_MDI && !defined(__WXUNIVERSAL__)
  29
  30 #include "wx/mdi.h"
  31
  32 #ifndef WX_PRECOMP
  33     #include "wx/frame.h"
  34     #include "wx/menu.h"
  35     #include "wx/app.h"
  36     #include "wx/utils.h"
  37     #include "wx/dialog.h"
  38     #include "wx/statusbr.h"
  39     #include "wx/settings.h"
  40     #include "wx/intl.h"
  41     #include "wx/log.h"
  42     #include "wx/toolbar.h"
  43 #endif
  44
  45 #include "wx/stockitem.h"
  46 #include "wx/msw/private.h"
  47
  48 #include <string.h>
  49
  50 // ---------------------------------------------------------------------------
  51 // global variables
  52 // ---------------------------------------------------------------------------
  53
  54 extern wxMenu *wxCurrentPopupMenu;
  55
  56 extern void wxRemoveHandleAssociation(wxWindow *win);
  57
  58 namespace
  59 {
  60
  61 // ---------------------------------------------------------------------------
  62 // constants
  63 // ---------------------------------------------------------------------------
  64
  65 // First ID for the MDI child menu item in the "Window" menu.
  66 const int wxFIRST_MDI_CHILD = 4100;
  67
  68 // There can be no more than 9 children in the "Window" menu as beginning with
  69 // the tenth one they're not shown and "More windows..." menu item is used
  70 // instead.
  71 const int wxLAST_MDI_CHILD = wxFIRST_MDI_CHILD + 8;
  72
  73 // The ID of the "More windows..." menu item is the next one after the last
  74 // child.
  75 const int wxID_MDI_MORE_WINDOWS = wxLAST_MDI_CHILD + 1;
  76
  77 // The MDI "Window" menu label
  78 const char *WINDOW_MENU_LABEL = gettext_noop("&Window");
  79
  80 // ---------------------------------------------------------------------------
  81 // private functions
  82 // ---------------------------------------------------------------------------
  83
  84 // set the MDI menus (by sending the WM_MDISETMENU message) and update the menu
  85 // of the parent of win (which is supposed to be the MDI client window)
  86 void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow);
  87
  88 // insert the window menu (subMenu) into menu just before "Help" submenu or at
  89 // the very end if not found
  90 void MDIInsertWindowMenu(wxWindow *win, WXHMENU hMenu, HMENU subMenu);
  91
  92 // Remove the window menu
  93 void MDIRemoveWindowMenu(wxWindow *win, WXHMENU hMenu);
  94
  95 // unpack the parameters of WM_MDIACTIVATE message
  96 void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
  97                        WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact);
  98
  99 // return the HMENU of the MDI menu
 100 //
 101 // this function works correctly even when we don't have a window menu and just
 102 // returns 0 then
 103 inline HMENU GetMDIWindowMenu(wxMDIParentFrame *frame)
 104 {
 105     wxMenu *menu = frame->GetWindowMenu();
 106     return menu ? GetHmenuOf(menu) : 0;
 107 }
 108
 109 } // anonymous namespace
 110
 111 // ===========================================================================
 112 // implementation
 113 // ===========================================================================
 114
 115 // ---------------------------------------------------------------------------
 116 // wxWin macros
 117 // ---------------------------------------------------------------------------
 118
 119 IMPLEMENT_DYNAMIC_CLASS(wxMDIParentFrame, wxFrame)
 120 IMPLEMENT_DYNAMIC_CLASS(wxMDIChildFrame, wxFrame)
 121 IMPLEMENT_DYNAMIC_CLASS(wxMDIClientWindow, wxWindow)
 122
 123 BEGIN_EVENT_TABLE(wxMDIParentFrame, wxFrame)
 124     EVT_SIZE(wxMDIParentFrame::OnSize)
 125     EVT_ICONIZE(wxMDIParentFrame::OnIconized)
 126     EVT_SYS_COLOUR_CHANGED(wxMDIParentFrame::OnSysColourChanged)
 127
 128 #if wxUSE_MENUS
 129     EVT_MENU_RANGE(wxFIRST_MDI_CHILD, wxLAST_MDI_CHILD,
 130                    wxMDIParentFrame::OnMDIChild)
 131     EVT_MENU_RANGE(wxID_MDI_WINDOW_FIRST, wxID_MDI_WINDOW_LAST,
 132                    wxMDIParentFrame::OnMDICommand)
 133 #endif // wxUSE_MENUS
 134 END_EVENT_TABLE()
 135
 136 BEGIN_EVENT_TABLE(wxMDIChildFrame, wxFrame)
 137     EVT_IDLE(wxMDIChildFrame::OnIdle)
 138 END_EVENT_TABLE()
 139
 140 BEGIN_EVENT_TABLE(wxMDIClientWindow, wxWindow)
 141     EVT_SCROLL(wxMDIClientWindow::OnScroll)
 142 END_EVENT_TABLE()
 143
 144 // ===========================================================================
 145 // wxMDIParentFrame: the frame which contains the client window which manages
 146 // the children
 147 // ===========================================================================
 148
 149 void wxMDIParentFrame::Init()
 150 {
 151 #if wxUSE_MENUS && wxUSE_ACCEL
 152   // the default menu doesn't have any accelerators (even if we have it)
 153   m_accelWindowMenu = NULL;
 154 #endif // wxUSE_MENUS && wxUSE_ACCEL
 155 }
 156
 157 bool wxMDIParentFrame::Create(wxWindow *parent,
 158                               wxWindowID id,
 159                               const wxString& title,
 160                               const wxPoint& pos,
 161                               const wxSize& size,
 162                               long style,
 163                               const wxString& name)
 164 {
 165   // this style can be used to prevent a window from having the standard MDI
 166   // "Window" menu
 167   if ( !(style & wxFRAME_NO_WINDOW_MENU) )
 168   {
 169       // normal case: we have the window menu, so construct it
 170       m_windowMenu = new wxMenu;
 171
 172       m_windowMenu->Append(wxID_MDI_WINDOW_CASCADE, _("&Cascade"));
 173       m_windowMenu->Append(wxID_MDI_WINDOW_TILE_HORZ, _("Tile &Horizontally"));
 174       m_windowMenu->Append(wxID_MDI_WINDOW_TILE_VERT, _("Tile &Vertically"));
 175       m_windowMenu->AppendSeparator();
 176       m_windowMenu->Append(wxID_MDI_WINDOW_ARRANGE_ICONS, _("&Arrange Icons"));
 177       m_windowMenu->Append(wxID_MDI_WINDOW_NEXT, _("&Next"));
 178       m_windowMenu->Append(wxID_MDI_WINDOW_PREV, _("&Previous"));
 179   }
 180
 181   if (!parent)
 182     wxTopLevelWindows.Append(this);
 183
 184   SetName(name);
 185   m_windowStyle = style;
 186
 187   if ( parent )
 188       parent->AddChild(this);
 189
 190   if ( id != wxID_ANY )
 191     m_windowId = id;
 192   else
 193     m_windowId = NewControlId();
 194
 195   WXDWORD exflags;
 196   WXDWORD msflags = MSWGetCreateWindowFlags(&exflags);
 197   msflags &= ~WS_VSCROLL;
 198   msflags &= ~WS_HSCROLL;
 199
 200   if ( !wxWindow::MSWCreate(wxApp::GetRegisteredClassName(wxT("wxMDIFrame")),
 201                             title.t_str(),
 202                             pos, size,
 203                             msflags,
 204                             exflags) )
 205   {
 206       return false;
 207   }
 208
 209   SetOwnBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE));
 210
 211   // unlike (almost?) all other windows, frames are created hidden
 212   m_isShown = false;
 213
 214   return true;
 215 }
 216
 217 wxMDIParentFrame::~wxMDIParentFrame()
 218 {
 219     // see comment in ~wxMDIChildFrame
 220 #if wxUSE_TOOLBAR
 221     m_frameToolBar = NULL;
 222 #endif
 223 #if wxUSE_STATUSBAR
 224     m_frameStatusBar = NULL;
 225 #endif // wxUSE_STATUSBAR
 226
 227 #if wxUSE_MENUS && wxUSE_ACCEL
 228     delete m_accelWindowMenu;
 229 #endif // wxUSE_MENUS && wxUSE_ACCEL
 230
 231     DestroyChildren();
 232
 233     // the MDI frame menubar is not automatically deleted by Windows unlike for
 234     // the normal frames
 235     if ( m_hMenu )
 236         ::DestroyMenu((HMENU)m_hMenu);
 237
 238     if ( m_clientWindow )
 239     {
 240         if ( m_clientWindow->MSWGetOldWndProc() )
 241             m_clientWindow->UnsubclassWin();
 242
 243         m_clientWindow->SetHWND(0);
 244         delete m_clientWindow;
 245     }
 246 }
 247
 248 // ----------------------------------------------------------------------------
 249 // wxMDIParentFrame child management
 250 // ----------------------------------------------------------------------------
 251
 252 wxMDIChildFrame *wxMDIParentFrame::GetActiveChild() const
 253 {
 254     HWND hWnd = (HWND)::SendMessage(GetWinHwnd(GetClientWindow()),
 255                                     WM_MDIGETACTIVE, 0, 0L);
 256     if ( !hWnd )
 257         return NULL;
 258
 259     return static_cast<wxMDIChildFrame *>(wxFindWinFromHandle(hWnd));
 260 }
 261
 262 int wxMDIParentFrame::GetChildFramesCount() const
 263 {
 264     int count = 0;
 265     for ( wxWindowList::const_iterator i = GetChildren().begin();
 266           i != GetChildren().end();
 267           ++i )
 268     {
 269         if ( wxDynamicCast(*i, wxMDIChildFrame) )
 270             count++;
 271     }
 272
 273     return count;
 274 }
 275
 276 #if wxUSE_MENUS
 277
 278 void wxMDIParentFrame::AddMDIChild(wxMDIChildFrame * WXUNUSED(child))
 279 {
 280     switch ( GetChildFramesCount() )
 281     {
 282         case 1:
 283             // first MDI child was just added, we need to insert the window
 284             // menu now if we have it
 285             AddWindowMenu();
 286
 287             // and disable the items which can't be used until we have more
 288             // than one child
 289             UpdateWindowMenu(false);
 290             break;
 291
 292         case 2:
 293             // second MDI child was added, enable the menu items which were
 294             // disabled because they didn't make sense for a single window
 295             UpdateWindowMenu(true);
 296             break;
 297     }
 298 }
 299
 300 void wxMDIParentFrame::RemoveMDIChild(wxMDIChildFrame * WXUNUSED(child))
 301 {
 302     switch ( GetChildFramesCount() )
 303     {
 304         case 1:
 305             // last MDI child is being removed, remove the now unnecessary
 306             // window menu too
 307             RemoveWindowMenu();
 308
 309             // there is no need to call UpdateWindowMenu(true) here so this is
 310             // not quite symmetric to AddMDIChild() above
 311             break;
 312
 313         case 2:
 314             // only one MDI child is going to remain, disable the menu commands
 315             // which don't make sense for a single child window
 316             UpdateWindowMenu(false);
 317             break;
 318     }
 319 }
 320
 321 // ----------------------------------------------------------------------------
 322 // wxMDIParentFrame window menu handling
 323 // ----------------------------------------------------------------------------
 324
 325 void wxMDIParentFrame::AddWindowMenu()
 326 {
 327     if ( m_windowMenu )
 328     {
 329         // For correct handling of the events from this menu we also must
 330         // attach it to the menu bar.
 331         m_windowMenu->Attach(GetMenuBar());
 332
 333         MDIInsertWindowMenu(GetClientWindow(), m_hMenu, GetMDIWindowMenu(this));
 334     }
 335 }
 336
 337 void wxMDIParentFrame::RemoveWindowMenu()
 338 {
 339     if ( m_windowMenu )
 340     {
 341         MDIRemoveWindowMenu(GetClientWindow(), m_hMenu);
 342
 343         m_windowMenu->Detach();
 344     }
 345 }
 346
 347 void wxMDIParentFrame::UpdateWindowMenu(bool enable)
 348 {
 349     if ( m_windowMenu )
 350     {
 351         m_windowMenu->Enable(wxID_MDI_WINDOW_NEXT, enable);
 352         m_windowMenu->Enable(wxID_MDI_WINDOW_PREV, enable);
 353     }
 354 }
 355
 356 #if wxUSE_MENUS_NATIVE
 357
 358 void wxMDIParentFrame::InternalSetMenuBar()
 359 {
 360     if ( GetActiveChild() )
 361     {
 362         AddWindowMenu();
 363     }
 364     else // we don't have any MDI children yet
 365     {
 366         // wait until we do to add the window menu but do set the main menu for
 367         // now (this is done by AddWindowMenu() as a side effect)
 368         MDISetMenu(GetClientWindow(), (HMENU)m_hMenu, NULL);
 369     }
 370 }
 371
 372 #endif // wxUSE_MENUS_NATIVE
 373
 374 void wxMDIParentFrame::SetWindowMenu(wxMenu* menu)
 375 {
 376     if ( menu != m_windowMenu )
 377     {
 378         // notice that Remove/AddWindowMenu() are safe to call even when
 379         // m_windowMenu is NULL
 380         RemoveWindowMenu();
 381
 382         delete m_windowMenu;
 383
 384         m_windowMenu = menu;
 385
 386         AddWindowMenu();
 387     }
 388
 389 #if wxUSE_ACCEL
 390     wxDELETE(m_accelWindowMenu);
 391
 392     if ( menu && menu->HasAccels() )
 393         m_accelWindowMenu = menu->CreateAccelTable();
 394 #endif // wxUSE_ACCEL
 395 }
 396
 397 // ----------------------------------------------------------------------------
 398 // wxMDIParentFrame other menu-related stuff
 399 // ----------------------------------------------------------------------------
 400
 401 void wxMDIParentFrame::DoMenuUpdates(wxMenu* menu)
 402 {
 403     wxMDIChildFrame *child = GetActiveChild();
 404     if ( child )
 405     {
 406         wxEvtHandler* source = child->GetEventHandler();
 407         wxMenuBar* bar = child->GetMenuBar();
 408
 409         if (menu)
 410         {
 411             menu->UpdateUI(source);
 412         }
 413         else
 414         {
 415             if ( bar != NULL )
 416             {
 417                 int nCount = bar->GetMenuCount();
 418                 for (int n = 0; n < nCount; n++)
 419                     bar->GetMenu(n)->UpdateUI(source);
 420             }
 421         }
 422     }
 423     else
 424     {
 425         wxFrameBase::DoMenuUpdates(menu);
 426     }
 427 }
 428
 429 wxMenuItem *wxMDIParentFrame::FindItemInMenuBar(int menuId) const
 430 {
 431     // We must look in the child menu first: if it has an item with the same ID
 432     // as in our own menu bar, the child item should be used to determine
 433     // whether it's currently enabled.
 434     wxMenuItem *item = GetActiveChild()
 435                             ? GetActiveChild()->FindItemInMenuBar(menuId)
 436                             : NULL;
 437     if ( !item )
 438         item = wxFrame::FindItemInMenuBar(menuId);
 439
 440     if ( !item && m_windowMenu )
 441         item = m_windowMenu->FindItem(menuId);
 442
 443     return item;
 444 }
 445
 446 WXHMENU wxMDIParentFrame::MSWGetActiveMenu() const
 447 {
 448     wxMDIChildFrame * const child  = GetActiveChild();
 449     if ( child )
 450     {
 451         const WXHMENU hmenu = child->MSWGetActiveMenu();
 452         if ( hmenu )
 453             return hmenu;
 454     }
 455
 456     return wxFrame::MSWGetActiveMenu();
 457 }
 458
 459 #endif // wxUSE_MENUS
 460
 461 // ----------------------------------------------------------------------------
 462 // wxMDIParentFrame event handling
 463 // ----------------------------------------------------------------------------
 464
 465 void wxMDIParentFrame::UpdateClientSize()
 466 {
 467     if ( GetClientWindow() )
 468     {
 469         int width, height;
 470         GetClientSize(&width, &height);
 471
 472         GetClientWindow()->SetSize(0, 0, width, height);
 473     }
 474 }
 475
 476 void wxMDIParentFrame::OnSize(wxSizeEvent& WXUNUSED(event))
 477 {
 478     UpdateClientSize();
 479
 480     // do not call event.Skip() here, it somehow messes up MDI client window
 481 }
 482
 483 void wxMDIParentFrame::OnIconized(wxIconizeEvent& event)
 484 {
 485     event.Skip();
 486
 487     if ( !event.IsIconized() )
 488         UpdateClientSize();
 489 }
 490
 491 // Responds to colour changes, and passes event on to children.
 492 void wxMDIParentFrame::OnSysColourChanged(wxSysColourChangedEvent& event)
 493 {
 494     if ( m_clientWindow )
 495     {
 496         m_clientWindow->SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE));
 497         m_clientWindow->Refresh();
 498     }
 499
 500     event.Skip();
 501 }
 502
 503 WXHICON wxMDIParentFrame::GetDefaultIcon() const
 504 {
 505     // we don't have any standard icons (any more)
 506     return (WXHICON)0;
 507 }
 508
 509 // ---------------------------------------------------------------------------
 510 // MDI operations
 511 // ---------------------------------------------------------------------------
 512
 513 void wxMDIParentFrame::Cascade()
 514 {
 515     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDICASCADE, 0, 0);
 516 }
 517
 518 void wxMDIParentFrame::Tile(wxOrientation orient)
 519 {
 520     wxASSERT_MSG( orient == wxHORIZONTAL || orient == wxVERTICAL,
 521                   wxT("invalid orientation value") );
 522
 523     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDITILE,
 524                   orient == wxHORIZONTAL ? MDITILE_HORIZONTAL
 525                                          : MDITILE_VERTICAL, 0);
 526 }
 527
 528 void wxMDIParentFrame::ArrangeIcons()
 529 {
 530     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDIICONARRANGE, 0, 0);
 531 }
 532
 533 void wxMDIParentFrame::ActivateNext()
 534 {
 535     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 0);
 536 }
 537
 538 void wxMDIParentFrame::ActivatePrevious()
 539 {
 540     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 1);
 541 }
 542
 543 // ---------------------------------------------------------------------------
 544 // the MDI parent frame window proc
 545 // ---------------------------------------------------------------------------
 546
 547 WXLRESULT wxMDIParentFrame::MSWWindowProc(WXUINT message,
 548                                           WXWPARAM wParam,
 549                                           WXLPARAM lParam)
 550 {
 551     WXLRESULT rc = 0;
 552     bool processed = false;
 553
 554     switch ( message )
 555     {
 556         case WM_ACTIVATE:
 557             {
 558                 WXWORD state, minimized;
 559                 WXHWND hwnd;
 560                 UnpackActivate(wParam, lParam, &state, &minimized, &hwnd);
 561
 562                 processed = HandleActivate(state, minimized != 0, hwnd);
 563             }
 564             break;
 565
 566         case WM_COMMAND:
 567             // system messages such as SC_CLOSE are sent as WM_COMMANDs to the
 568             // parent MDI frame and we must let the DefFrameProc() have them
 569             // for these commands to work (without it, closing the maximized
 570             // MDI children doesn't work, for example)
 571             {
 572                 WXWORD id, cmd;
 573                 WXHWND hwnd;
 574                 UnpackCommand(wParam, lParam, &id, &hwnd, &cmd);
 575
 576                 if ( id == wxID_MDI_MORE_WINDOWS ||
 577                      (cmd == 0 /* menu */ &&
 578                         id >= SC_SIZE /* first system menu command */) )
 579                 {
 580                     MSWDefWindowProc(message, wParam, lParam);
 581                     processed = true;
 582                 }
 583             }
 584             break;
 585
 586         case WM_CREATE:
 587             m_clientWindow = OnCreateClient();
 588             // Uses own style for client style
 589             if ( !m_clientWindow->CreateClient(this, GetWindowStyleFlag()) )
 590             {
 591                 wxLogMessage(_("Failed to create MDI parent frame."));
 592
 593                 rc = -1;
 594             }
 595
 596             processed = true;
 597             break;
 598     }
 599
 600     if ( !processed )
 601         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 602
 603     return rc;
 604 }
 605
 606 bool wxMDIParentFrame::HandleActivate(int state, bool minimized, WXHWND activate)
 607 {
 608     bool processed = false;
 609
 610     if ( wxWindow::HandleActivate(state, minimized, activate) )
 611     {
 612         // already processed
 613         processed = true;
 614     }
 615
 616     // If this window is an MDI parent, we must also send an OnActivate message
 617     // to the current child.
 618     if ( GetActiveChild() &&
 619          ((state == WA_ACTIVE) || (state == WA_CLICKACTIVE)) )
 620     {
 621         wxActivateEvent event(wxEVT_ACTIVATE, true, GetActiveChild()->GetId());
 622         event.SetEventObject( GetActiveChild() );
 623         if ( GetActiveChild()->HandleWindowEvent(event) )
 624             processed = true;
 625     }
 626
 627     return processed;
 628 }
 629
 630 #if wxUSE_MENUS
 631
 632 void wxMDIParentFrame::OnMDIChild(wxCommandEvent& event)
 633 {
 634     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 635     while ( node )
 636     {
 637         wxWindow *child = node->GetData();
 638         if ( child->GetHWND() )
 639         {
 640             int childId = wxGetWindowId(child->GetHWND());
 641             if ( childId == event.GetId() )
 642             {
 643                 wxStaticCast(child, wxMDIChildFrame)->Activate();
 644                 return;
 645             }
 646         }
 647
 648         node = node->GetNext();
 649     }
 650
 651     wxFAIL_MSG( "unknown MDI child selected?" );
 652 }
 653
 654 void wxMDIParentFrame::OnMDICommand(wxCommandEvent& event)
 655 {
 656     WXWPARAM wParam = 0;
 657     WXLPARAM lParam = 0;
 658     int msg;
 659     switch ( event.GetId() )
 660     {
 661         case wxID_MDI_WINDOW_CASCADE:
 662             msg = WM_MDICASCADE;
 663             wParam = MDITILE_SKIPDISABLED;
 664             break;
 665
 666         case wxID_MDI_WINDOW_TILE_HORZ:
 667             wParam |= MDITILE_HORIZONTAL;
 668             // fall through
 669
 670         case wxID_MDI_WINDOW_TILE_VERT:
 671             if ( !wParam )
 672                 wParam = MDITILE_VERTICAL;
 673             msg = WM_MDITILE;
 674             wParam |= MDITILE_SKIPDISABLED;
 675             break;
 676
 677         case wxID_MDI_WINDOW_ARRANGE_ICONS:
 678             msg = WM_MDIICONARRANGE;
 679             break;
 680
 681         case wxID_MDI_WINDOW_NEXT:
 682             msg = WM_MDINEXT;
 683             lParam = 0;         // next child
 684             break;
 685
 686         case wxID_MDI_WINDOW_PREV:
 687             msg = WM_MDINEXT;
 688             lParam = 1;         // previous child
 689             break;
 690
 691         default:
 692             wxFAIL_MSG( "unknown MDI command" );
 693             return;
 694     }
 695
 696     ::SendMessage(GetWinHwnd(GetClientWindow()), msg, wParam, lParam);
 697 }
 698
 699 #endif // wxUSE_MENUS
 700
 701 bool wxMDIParentFrame::TryBefore(wxEvent& event)
 702 {
 703     // menu (and toolbar) events should be sent to the active child frame
 704     // first, if any
 705     if ( event.GetEventType() == wxEVT_MENU )
 706     {
 707         wxMDIChildFrame * const child = GetActiveChild();
 708         if ( child && child->ProcessWindowEventLocally(event) )
 709             return true;
 710     }
 711
 712     return wxMDIParentFrameBase::TryBefore(event);
 713 }
 714
 715 WXLRESULT wxMDIParentFrame::MSWDefWindowProc(WXUINT message,
 716                                         WXWPARAM wParam,
 717                                         WXLPARAM lParam)
 718 {
 719     WXHWND clientWnd;
 720     if ( GetClientWindow() )
 721         clientWnd = GetClientWindow()->GetHWND();
 722     else
 723         clientWnd = 0;
 724
 725     return DefFrameProc(GetHwnd(), (HWND)clientWnd, message, wParam, lParam);
 726 }
 727
 728 bool wxMDIParentFrame::MSWTranslateMessage(WXMSG* msg)
 729 {
 730     MSG *pMsg = (MSG *)msg;
 731
 732     // first let the current child get it
 733     wxMDIChildFrame * const child = GetActiveChild();
 734     if ( child && child->MSWTranslateMessage(msg) )
 735     {
 736         return true;
 737     }
 738
 739     // then try out accelerator table (will also check the accelerators for the
 740     // normal menu items)
 741     if ( wxFrame::MSWTranslateMessage(msg) )
 742     {
 743         return true;
 744     }
 745
 746 #if wxUSE_MENUS && wxUSE_ACCEL
 747     // but it doesn't check for the (custom) accelerators of the window menu
 748     // items as it's not part of the menu bar as it's handled by Windows itself
 749     // so we need to do this explicitly
 750     if ( m_accelWindowMenu && m_accelWindowMenu->Translate(this, msg) )
 751         return true;
 752 #endif // wxUSE_MENUS && wxUSE_ACCEL
 753
 754     // finally, check for MDI specific built-in accelerators
 755     if ( pMsg->message == WM_KEYDOWN || pMsg->message == WM_SYSKEYDOWN )
 756     {
 757         if ( ::TranslateMDISysAccel(GetWinHwnd(GetClientWindow()), pMsg))
 758             return true;
 759     }
 760
 761     return false;
 762 }
 763
 764 // ===========================================================================
 765 // wxMDIChildFrame
 766 // ===========================================================================
 767
 768 void wxMDIChildFrame::Init()
 769 {
 770     m_needsResize = true;
 771     m_needsInitialShow = true;
 772 }
 773
 774 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 775                              wxWindowID id,
 776                              const wxString& title,
 777                              const wxPoint& pos,
 778                              const wxSize& size,
 779                              long style,
 780                              const wxString& name)
 781 {
 782     m_mdiParent = parent;
 783
 784   SetName(name);
 785
 786   if ( id != wxID_ANY )
 787     m_windowId = id;
 788   else
 789     m_windowId = NewControlId();
 790
 791   if ( parent )
 792   {
 793       parent->AddChild(this);
 794   }
 795
 796   int x = pos.x;
 797   int y = pos.y;
 798   int width = size.x;
 799   int height = size.y;
 800
 801   MDICREATESTRUCT mcs;
 802
 803   wxString className =
 804       wxApp::GetRegisteredClassName(wxT("wxMDIChildFrame"), COLOR_WINDOW);
 805   if ( !(style & wxFULL_REPAINT_ON_RESIZE) )
 806       className += wxApp::GetNoRedrawClassSuffix();
 807
 808   mcs.szClass = className.t_str();
 809   mcs.szTitle = title.t_str();
 810   mcs.hOwner = wxGetInstance();
 811   if (x != wxDefaultCoord)
 812       mcs.x = x;
 813   else
 814       mcs.x = CW_USEDEFAULT;
 815
 816   if (y != wxDefaultCoord)
 817       mcs.y = y;
 818   else
 819       mcs.y = CW_USEDEFAULT;
 820
 821   if (width != wxDefaultCoord)
 822       mcs.cx = width;
 823   else
 824       mcs.cx = CW_USEDEFAULT;
 825
 826   if (height != wxDefaultCoord)
 827       mcs.cy = height;
 828   else
 829       mcs.cy = CW_USEDEFAULT;
 830
 831   DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN;
 832   if (style & wxMINIMIZE_BOX)
 833     msflags |= WS_MINIMIZEBOX;
 834   if (style & wxMAXIMIZE_BOX)
 835     msflags |= WS_MAXIMIZEBOX;
 836   if (style & wxRESIZE_BORDER)
 837     msflags |= WS_THICKFRAME;
 838   if (style & wxSYSTEM_MENU)
 839     msflags |= WS_SYSMENU;
 840   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 841     msflags |= WS_MINIMIZE;
 842   if (style & wxMAXIMIZE)
 843     msflags |= WS_MAXIMIZE;
 844   if (style & wxCAPTION)
 845     msflags |= WS_CAPTION;
 846
 847   mcs.style = msflags;
 848
 849   mcs.lParam = 0;
 850
 851   wxWindowCreationHook hook(this);
 852
 853   m_hWnd = (WXHWND)::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 854                                  WM_MDICREATE, 0, (LPARAM)&mcs);
 855
 856   if ( !m_hWnd )
 857   {
 858       wxLogLastError(wxT("WM_MDICREATE"));
 859       return false;
 860   }
 861
 862   SubclassWin(m_hWnd);
 863
 864   parent->AddMDIChild(this);
 865
 866   return true;
 867 }
 868
 869 wxMDIChildFrame::~wxMDIChildFrame()
 870 {
 871     // if we hadn't been created, there is nothing to destroy
 872     if ( !m_hWnd )
 873         return;
 874
 875     GetMDIParent()->RemoveMDIChild(this);
 876
 877     // will be destroyed by DestroyChildren() but reset them before calling it
 878     // to avoid using dangling pointers if a callback comes in the meanwhile
 879 #if wxUSE_TOOLBAR
 880     m_frameToolBar = NULL;
 881 #endif
 882 #if wxUSE_STATUSBAR
 883     m_frameStatusBar = NULL;
 884 #endif // wxUSE_STATUSBAR
 885
 886     DestroyChildren();
 887
 888     MDIRemoveWindowMenu(NULL, m_hMenu);
 889
 890     MSWDestroyWindow();
 891 }
 892
 893 bool wxMDIChildFrame::Show(bool show)
 894 {
 895     m_needsInitialShow = false;
 896
 897     if (!wxFrame::Show(show))
 898         return false;
 899
 900     // KH: Without this call, new MDI children do not become active.
 901     // This was added here after the same BringWindowToTop call was
 902     // removed from wxTopLevelWindow::Show (November 2005)
 903     if ( show )
 904         ::BringWindowToTop(GetHwnd());
 905
 906     // we need to refresh the MDI frame window menu to include (or exclude if
 907     // we've been hidden) this frame
 908     wxMDIParentFrame * const parent = GetMDIParent();
 909     MDISetMenu(parent->GetClientWindow(), NULL, NULL);
 910
 911     return true;
 912 }
 913
 914 void
 915 wxMDIChildFrame::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 916 {
 917     // we need to disable client area origin adjustments used for the child
 918     // windows for the frame itself
 919     wxMDIChildFrameBase::DoSetSize(x, y, width, height, sizeFlags);
 920 }
 921
 922 // Set the client size (i.e. leave the calculation of borders etc.
 923 // to wxWidgets)
 924 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 925 {
 926   HWND hWnd = GetHwnd();
 927
 928   RECT rect;
 929   ::GetClientRect(hWnd, &rect);
 930
 931   RECT rect2;
 932   GetWindowRect(hWnd, &rect2);
 933
 934   // Find the difference between the entire window (title bar and all)
 935   // and the client area; add this to the new client size to move the
 936   // window
 937   int actual_width = rect2.right - rect2.left - rect.right + width;
 938   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 939
 940 #if wxUSE_STATUSBAR
 941   if (GetStatusBar() && GetStatusBar()->IsShown())
 942   {
 943     int sx, sy;
 944     GetStatusBar()->GetSize(&sx, &sy);
 945     actual_height += sy;
 946   }
 947 #endif // wxUSE_STATUSBAR
 948
 949   POINT point;
 950   point.x = rect2.left;
 951   point.y = rect2.top;
 952
 953   // If there's an MDI parent, must subtract the parent's top left corner
 954   // since MoveWindow moves relative to the parent
 955   wxMDIParentFrame * const mdiParent = GetMDIParent();
 956   ::ScreenToClient(GetHwndOf(mdiParent->GetClientWindow()), &point);
 957
 958   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)true);
 959
 960   wxSize size(width, height);
 961   wxSizeEvent event(size, m_windowId);
 962   event.SetEventObject( this );
 963   HandleWindowEvent(event);
 964 }
 965
 966 // Unlike other wxTopLevelWindowBase, the mdi child's "GetPosition" is not the
 967 //  same as its GetScreenPosition
 968 void wxMDIChildFrame::DoGetScreenPosition(int *x, int *y) const
 969 {
 970   HWND hWnd = GetHwnd();
 971
 972   RECT rect;
 973   ::GetWindowRect(hWnd, &rect);
 974   if (x)
 975      *x = rect.left;
 976   if (y)
 977      *y = rect.top;
 978 }
 979
 980
 981 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 982 {
 983   RECT rect;
 984   GetWindowRect(GetHwnd(), &rect);
 985   POINT point;
 986   point.x = rect.left;
 987   point.y = rect.top;
 988
 989   // Since we now have the absolute screen coords,
 990   // if there's a parent we must subtract its top left corner
 991   wxMDIParentFrame * const mdiParent = GetMDIParent();
 992   ::ScreenToClient(GetHwndOf(mdiParent->GetClientWindow()), &point);
 993
 994   if (x)
 995       *x = point.x;
 996   if (y)
 997       *y = point.y;
 998 }
 999
1000 void wxMDIChildFrame::InternalSetMenuBar()
1001 {
1002     wxMDIParentFrame * const parent = GetMDIParent();
1003
1004     MDIInsertWindowMenu(parent->GetClientWindow(),
1005                      m_hMenu, GetMDIWindowMenu(parent));
1006 }
1007
1008 void wxMDIChildFrame::DetachMenuBar()
1009 {
1010     MDIRemoveWindowMenu(NULL, m_hMenu);
1011     wxFrame::DetachMenuBar();
1012 }
1013
1014 WXHICON wxMDIChildFrame::GetDefaultIcon() const
1015 {
1016     // we don't have any standard icons (any more)
1017     return (WXHICON)0;
1018 }
1019
1020 // ---------------------------------------------------------------------------
1021 // MDI operations
1022 // ---------------------------------------------------------------------------
1023
1024 void wxMDIChildFrame::Maximize(bool maximize)
1025 {
1026     wxMDIParentFrame * const parent = GetMDIParent();
1027     if ( parent && parent->GetClientWindow() )
1028     {
1029         ::SendMessage(GetWinHwnd(parent->GetClientWindow()),
1030                       maximize ? WM_MDIMAXIMIZE : WM_MDIRESTORE,
1031                       (WPARAM)GetHwnd(), 0);
1032     }
1033 }
1034
1035 void wxMDIChildFrame::Restore()
1036 {
1037     wxMDIParentFrame * const parent = GetMDIParent();
1038     if ( parent && parent->GetClientWindow() )
1039     {
1040         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIRESTORE,
1041                       (WPARAM) GetHwnd(), 0);
1042     }
1043 }
1044
1045 void wxMDIChildFrame::Activate()
1046 {
1047     wxMDIParentFrame * const parent = GetMDIParent();
1048     if ( parent && parent->GetClientWindow() )
1049     {
1050         // Activating an iconized MDI frame doesn't do anything, so restore it
1051         // first to really present it to the user.
1052         if ( IsIconized() )
1053             Restore();
1054
1055         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIACTIVATE,
1056                       (WPARAM) GetHwnd(), 0);
1057     }
1058 }
1059
1060 // ---------------------------------------------------------------------------
1061 // MDI window proc and message handlers
1062 // ---------------------------------------------------------------------------
1063
1064 WXLRESULT wxMDIChildFrame::MSWWindowProc(WXUINT message,
1065                                          WXWPARAM wParam,
1066                                          WXLPARAM lParam)
1067 {
1068     WXLRESULT rc = 0;
1069     bool processed = false;
1070
1071     switch ( message )
1072     {
1073         case WM_GETMINMAXINFO:
1074             processed = HandleGetMinMaxInfo((MINMAXINFO *)lParam);
1075             break;
1076
1077         case WM_MDIACTIVATE:
1078             {
1079                 WXWORD act;
1080                 WXHWND hwndAct, hwndDeact;
1081                 UnpackMDIActivate(wParam, lParam, &act, &hwndAct, &hwndDeact);
1082
1083                 processed = HandleMDIActivate(act, hwndAct, hwndDeact);
1084             }
1085             // fall through
1086
1087         case WM_MOVE:
1088             // must pass WM_MOVE to DefMDIChildProc() to recalculate MDI client
1089             // scrollbars if necessary
1090
1091             // fall through
1092
1093         case WM_SIZE:
1094             // must pass WM_SIZE to DefMDIChildProc(), otherwise many weird
1095             // things happen
1096             MSWDefWindowProc(message, wParam, lParam);
1097             break;
1098
1099         case WM_WINDOWPOSCHANGING:
1100             processed = HandleWindowPosChanging((LPWINDOWPOS)lParam);
1101             break;
1102     }
1103
1104     if ( !processed )
1105         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
1106
1107     return rc;
1108 }
1109
1110 bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
1111                                         WXHWND hwndAct,
1112                                         WXHWND hwndDeact)
1113 {
1114     wxMDIParentFrame * const parent = GetMDIParent();
1115
1116     WXHMENU hMenuToSet = 0;
1117
1118     bool activated;
1119
1120     if ( m_hWnd == hwndAct )
1121     {
1122         activated = true;
1123         parent->SetActiveChild(this);
1124
1125         WXHMENU hMenuChild = m_hMenu;
1126         if ( hMenuChild )
1127             hMenuToSet = hMenuChild;
1128     }
1129     else if ( m_hWnd == hwndDeact )
1130     {
1131         wxASSERT_MSG( parent->GetActiveChild() == this,
1132                       wxT("can't deactivate MDI child which wasn't active!") );
1133
1134         activated = false;
1135         parent->SetActiveChild(NULL);
1136
1137         WXHMENU hMenuParent = parent->m_hMenu;
1138
1139         // activate the parent menu only when there is no other child
1140         // that has been activated
1141         if ( hMenuParent && !hwndAct )
1142             hMenuToSet = hMenuParent;
1143     }
1144     else
1145     {
1146         // we have nothing to do with it
1147         return false;
1148     }
1149
1150     if ( hMenuToSet )
1151     {
1152         MDISetMenu(parent->GetClientWindow(),
1153                    (HMENU)hMenuToSet, GetMDIWindowMenu(parent));
1154     }
1155
1156     wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
1157     event.SetEventObject( this );
1158
1159     ResetWindowStyle(NULL);
1160
1161     return HandleWindowEvent(event);
1162 }
1163
1164 bool wxMDIChildFrame::HandleWindowPosChanging(void *pos)
1165 {
1166     WINDOWPOS *lpPos = (WINDOWPOS *)pos;
1167
1168     if (!(lpPos->flags & SWP_NOSIZE))
1169     {
1170         RECT rectClient;
1171         DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
1172         DWORD dwStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1173         if (ResetWindowStyle((void *) & rectClient) && (dwStyle & WS_MAXIMIZE))
1174         {
1175             ::AdjustWindowRectEx(&rectClient, dwStyle, false, dwExStyle);
1176             lpPos->x = rectClient.left;
1177             lpPos->y = rectClient.top;
1178             lpPos->cx = rectClient.right - rectClient.left;
1179             lpPos->cy = rectClient.bottom - rectClient.top;
1180         }
1181     }
1182
1183     return false;
1184 }
1185
1186 bool wxMDIChildFrame::HandleGetMinMaxInfo(void *mmInfo)
1187 {
1188     MINMAXINFO *info = (MINMAXINFO *)mmInfo;
1189
1190     // let the default window proc calculate the size of MDI children
1191     // frames because it is based on the size of the MDI client window,
1192     // not on the values specified in wxWindow m_max variables
1193     bool processed = MSWDefWindowProc(WM_GETMINMAXINFO, 0, (LPARAM)mmInfo) != 0;
1194
1195     int minWidth = GetMinWidth(),
1196         minHeight = GetMinHeight();
1197
1198     // but allow GetSizeHints() to set the min size
1199     if ( minWidth != wxDefaultCoord )
1200     {
1201         info->ptMinTrackSize.x = minWidth;
1202
1203         processed = true;
1204     }
1205
1206     if ( minHeight != wxDefaultCoord )
1207     {
1208         info->ptMinTrackSize.y = minHeight;
1209
1210         processed = true;
1211     }
1212
1213     return processed;
1214 }
1215
1216 // ---------------------------------------------------------------------------
1217 // MDI specific message translation/preprocessing
1218 // ---------------------------------------------------------------------------
1219
1220 WXLRESULT wxMDIChildFrame::MSWDefWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
1221 {
1222     return DefMDIChildProc(GetHwnd(),
1223                            (UINT)message, (WPARAM)wParam, (LPARAM)lParam);
1224 }
1225
1226 bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
1227 {
1228     // we must pass the parent frame to ::TranslateAccelerator(), otherwise it
1229     // doesn't do its job correctly for MDI child menus
1230     return MSWDoTranslateMessage(GetMDIParent(), msg);
1231 }
1232
1233 // ---------------------------------------------------------------------------
1234 // misc
1235 // ---------------------------------------------------------------------------
1236
1237 void wxMDIChildFrame::MSWDestroyWindow()
1238 {
1239     wxMDIParentFrame * const parent = GetMDIParent();
1240
1241     // Must make sure this handle is invalidated (set to NULL) since all sorts
1242     // of things could happen after the child client is destroyed, but before
1243     // the wxFrame is destroyed.
1244
1245     HWND oldHandle = (HWND)GetHWND();
1246     SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIDESTROY,
1247                 (WPARAM)oldHandle, 0);
1248
1249     if (parent->GetActiveChild() == NULL)
1250         ResetWindowStyle(NULL);
1251
1252     if (m_hMenu)
1253     {
1254         ::DestroyMenu((HMENU) m_hMenu);
1255         m_hMenu = 0;
1256     }
1257     wxRemoveHandleAssociation(this);
1258     m_hWnd = 0;
1259 }
1260
1261 // Change the client window's extended style so we don't get a client edge
1262 // style when a child is maximised (a double border looks silly.)
1263 bool wxMDIChildFrame::ResetWindowStyle(void *vrect)
1264 {
1265     RECT *rect = (RECT *)vrect;
1266     wxMDIParentFrame * const pFrameWnd = GetMDIParent();
1267     wxMDIChildFrame* pChild = pFrameWnd->GetActiveChild();
1268
1269     if (!pChild || (pChild == this))
1270     {
1271         HWND hwndClient = GetWinHwnd(pFrameWnd->GetClientWindow());
1272         DWORD dwStyle = ::GetWindowLong(hwndClient, GWL_EXSTYLE);
1273
1274         // we want to test whether there is a maximized child, so just set
1275         // dwThisStyle to 0 if there is no child at all
1276         DWORD dwThisStyle = pChild
1277             ? ::GetWindowLong(GetWinHwnd(pChild), GWL_STYLE) : 0;
1278         DWORD dwNewStyle = dwStyle;
1279         if ( dwThisStyle & WS_MAXIMIZE )
1280             dwNewStyle &= ~(WS_EX_CLIENTEDGE);
1281         else
1282             dwNewStyle |= WS_EX_CLIENTEDGE;
1283
1284         if (dwStyle != dwNewStyle)
1285         {
1286             // force update of everything
1287             ::RedrawWindow(hwndClient, NULL, NULL,
1288                            RDW_INVALIDATE | RDW_ALLCHILDREN);
1289             ::SetWindowLong(hwndClient, GWL_EXSTYLE, dwNewStyle);
1290             ::SetWindowPos(hwndClient, NULL, 0, 0, 0, 0,
1291                            SWP_FRAMECHANGED | SWP_NOACTIVATE |
1292                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
1293                            SWP_NOCOPYBITS);
1294             if (rect)
1295                 ::GetClientRect(hwndClient, rect);
1296
1297             return true;
1298         }
1299     }
1300
1301     return false;
1302 }
1303
1304 // ===========================================================================
1305 // wxMDIClientWindow: the window of predefined (by Windows) class which
1306 // contains the child frames
1307 // ===========================================================================
1308
1309 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
1310 {
1311     m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE);
1312
1313     CLIENTCREATESTRUCT ccs;
1314     m_windowStyle = style;
1315     m_parent = parent;
1316
1317     ccs.hWindowMenu = GetMDIWindowMenu(parent);
1318     ccs.idFirstChild = wxFIRST_MDI_CHILD;
1319
1320     DWORD msStyle = MDIS_ALLCHILDSTYLES | WS_VISIBLE | WS_CHILD |
1321                     WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
1322
1323     if ( style & wxHSCROLL )
1324         msStyle |= WS_HSCROLL;
1325     if ( style & wxVSCROLL )
1326         msStyle |= WS_VSCROLL;
1327
1328     DWORD exStyle = WS_EX_CLIENTEDGE;
1329
1330     wxWindowCreationHook hook(this);
1331     m_hWnd = (WXHWND)::CreateWindowEx
1332                        (
1333                         exStyle,
1334                         wxT("MDICLIENT"),
1335                         NULL,
1336                         msStyle,
1337                         0, 0, 0, 0,
1338                         GetWinHwnd(parent),
1339                         NULL,
1340                         wxGetInstance(),
1341                         (LPSTR)(LPCLIENTCREATESTRUCT)&ccs);
1342     if ( !m_hWnd )
1343     {
1344         wxLogLastError(wxT("CreateWindowEx(MDI client)"));
1345
1346         return false;
1347     }
1348
1349     SubclassWin(m_hWnd);
1350
1351     return true;
1352 }
1353
1354 // Explicitly call default scroll behaviour
1355 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
1356 {
1357     // Note: for client windows, the scroll position is not set in
1358     // WM_HSCROLL, WM_VSCROLL, so we can't easily determine what
1359     // scroll position we're at.
1360     // This makes it hard to paint patterns or bitmaps in the background,
1361     // and have the client area scrollable as well.
1362
1363     if ( event.GetOrientation() == wxHORIZONTAL )
1364         m_scrollX = event.GetPosition(); // Always returns zero!
1365     else
1366         m_scrollY = event.GetPosition(); // Always returns zero!
1367
1368     event.Skip();
1369 }
1370
1371 void wxMDIClientWindow::DoSetSize(int x, int y, int width, int height, int sizeFlags)
1372 {
1373     // Try to fix a problem whereby if you show an MDI child frame, then reposition the
1374     // client area, you can end up with a non-refreshed portion in the client window
1375     // (see OGL studio sample). So check if the position is changed and if so,
1376     // redraw the MDI child frames.
1377
1378     const wxPoint oldPos = GetPosition();
1379
1380     wxWindow::DoSetSize(x, y, width, height, sizeFlags | wxSIZE_FORCE);
1381
1382     const wxPoint newPos = GetPosition();
1383
1384     if ((newPos.x != oldPos.x) || (newPos.y != oldPos.y))
1385     {
1386         if (GetParent())
1387         {
1388             wxWindowList::compatibility_iterator node = GetParent()->GetChildren().GetFirst();
1389             while (node)
1390             {
1391                 wxWindow *child = node->GetData();
1392                 if (wxDynamicCast(child, wxMDIChildFrame))
1393                 {
1394                    ::RedrawWindow(GetHwndOf(child),
1395                                   NULL,
1396                                   NULL,
1397                                   RDW_FRAME |
1398                                   RDW_ALLCHILDREN |
1399                                   RDW_INVALIDATE);
1400                 }
1401                 node = node->GetNext();
1402             }
1403         }
1404     }
1405 }
1406
1407 void wxMDIChildFrame::OnIdle(wxIdleEvent& event)
1408 {
1409     // wxMSW prior to 2.5.3 created MDI child frames as visible, which resulted
1410     // in flicker e.g. when the frame contained controls with non-trivial
1411     // layout. Since 2.5.3, the frame is created hidden as all other top level
1412     // windows. In order to maintain backward compatibility, the frame is shown
1413     // in OnIdle, unless Show(false) was called by the programmer before.
1414     if ( m_needsInitialShow )
1415     {
1416         Show(true);
1417     }
1418
1419     // MDI child frames get their WM_SIZE when they're constructed but at this
1420     // moment they don't have any children yet so all child windows will be
1421     // positioned incorrectly when they are added later - to fix this, we
1422     // generate an artificial size event here
1423     if ( m_needsResize )
1424     {
1425         m_needsResize = false; // avoid any possibility of recursion
1426
1427         SendSizeEvent();
1428     }
1429
1430     event.Skip();
1431 }
1432
1433 // ---------------------------------------------------------------------------
1434 // private helper functions
1435 // ---------------------------------------------------------------------------
1436
1437 namespace
1438 {
1439
1440 void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow)
1441 {
1442     if ( hmenuFrame || hmenuWindow )
1443     {
1444         if ( !::SendMessage(GetWinHwnd(win),
1445                             WM_MDISETMENU,
1446                             (WPARAM)hmenuFrame,
1447                             (LPARAM)hmenuWindow) )
1448         {
1449             DWORD err = ::GetLastError();
1450             if ( err )
1451             {
1452                 wxLogApiError(wxT("SendMessage(WM_MDISETMENU)"), err);
1453             }
1454         }
1455     }
1456
1457     // update menu bar of the parent window
1458     wxWindow *parent = win->GetParent();
1459     wxCHECK_RET( parent, wxT("MDI client without parent frame? weird...") );
1460
1461     ::SendMessage(GetWinHwnd(win), WM_MDIREFRESHMENU, 0, 0L);
1462
1463     ::DrawMenuBar(GetWinHwnd(parent));
1464 }
1465
1466 void MDIInsertWindowMenu(wxWindow *win, WXHMENU hMenu, HMENU menuWin)
1467 {
1468     HMENU hmenu = (HMENU)hMenu;
1469
1470     if ( menuWin )
1471     {
1472         // Try to insert Window menu in front of Help, otherwise append it.
1473         int N = GetMenuItemCount(hmenu);
1474         bool inserted = false;
1475         for ( int i = 0; i < N; i++ )
1476         {
1477             wxChar buf[256];
1478             if ( !::GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION) )
1479             {
1480                 wxLogLastError(wxT("GetMenuString"));
1481
1482                 continue;
1483             }
1484
1485             const wxString label = wxStripMenuCodes(buf);
1486             if ( label == wxGetStockLabel(wxID_HELP, wxSTOCK_NOFLAGS) )
1487             {
1488                 inserted = true;
1489                 ::InsertMenu(hmenu, i, MF_BYPOSITION | MF_POPUP | MF_STRING,
1490                              (UINT_PTR)menuWin,
1491                              wxString(wxGetTranslation(WINDOW_MENU_LABEL)).t_str());
1492                 break;
1493             }
1494         }
1495
1496         if ( !inserted )
1497         {
1498             ::AppendMenu(hmenu, MF_POPUP,
1499                          (UINT_PTR)menuWin,
1500                          wxString(wxGetTranslation(WINDOW_MENU_LABEL)).t_str());
1501         }
1502     }
1503
1504     MDISetMenu(win, hmenu, menuWin);
1505 }
1506
1507 void MDIRemoveWindowMenu(wxWindow *win, WXHMENU hMenu)
1508 {
1509     HMENU hmenu = (HMENU)hMenu;
1510
1511     if ( hmenu )
1512     {
1513         wxChar buf[1024];
1514
1515         int N = ::GetMenuItemCount(hmenu);
1516         for ( int i = 0; i < N; i++ )
1517         {
1518             if ( !::GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION) )
1519             {
1520                 // Ignore successful read of menu string with length 0 which
1521                 // occurs, for example, for a maximized MDI child system menu
1522                 if ( ::GetLastError() != 0 )
1523                 {
1524                     wxLogLastError(wxT("GetMenuString"));
1525                 }
1526
1527                 continue;
1528             }
1529
1530             if ( wxStrcmp(buf, wxGetTranslation(WINDOW_MENU_LABEL)) == 0 )
1531             {
1532                 if ( !::RemoveMenu(hmenu, i, MF_BYPOSITION) )
1533                 {
1534                     wxLogLastError(wxT("RemoveMenu"));
1535                 }
1536
1537                 break;
1538             }
1539         }
1540     }
1541
1542     if ( win )
1543     {
1544         // we don't change the windows menu, but we update the main one
1545         MDISetMenu(win, hmenu, NULL);
1546     }
1547 }
1548
1549 void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
1550                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact)
1551 {
1552     *activate = true;
1553     *hwndAct = (WXHWND)lParam;
1554     *hwndDeact = (WXHWND)wParam;
1555 }
1556
1557 } // anonymous namespace
1558
1559 #endif // wxUSE_MDI && !defined(__WXUNIVERSAL__)