src/msw/mdi.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        mdi.cpp
   3 // Purpose:     MDI classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "mdi.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/setup.h"
  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     #if wxUSE_STATUSBAR
  39         #include "wx/statusbr.h"
  40     #endif
  41     #include "wx/settings.h"
  42     #include "wx/intl.h"
  43     #include "wx/log.h"
  44 #endif
  45
  46 #include "wx/mdi.h"
  47 #include "wx/msw/private.h"
  48
  49 #if wxUSE_STATUSBAR && wxUSE_NATIVE_STATUSBAR
  50     #include "wx/msw/statbr95.h"
  51 #endif
  52
  53 #if wxUSE_TOOLBAR
  54     #include "wx/toolbar.h"
  55 #endif // wxUSE_TOOLBAR
  56
  57 #include <string.h>
  58
  59 // ---------------------------------------------------------------------------
  60 // global variables
  61 // ---------------------------------------------------------------------------
  62
  63 extern wxWindowList wxModelessWindows;      // from dialog.cpp
  64 extern wxMenu *wxCurrentPopupMenu;
  65
  66 extern const wxChar *wxMDIFrameClassName;
  67 extern const wxChar *wxMDIChildFrameClassName;
  68 extern wxWindow *wxWndHook;                 // from window.cpp
  69
  70 extern void wxAssociateWinWithHandle(HWND hWnd, wxWindow *win);
  71 extern void wxRemoveHandleAssociation(wxWindow *win);
  72
  73 static HWND invalidHandle = 0;
  74
  75 // ---------------------------------------------------------------------------
  76 // constants
  77 // ---------------------------------------------------------------------------
  78
  79 static const int IDM_WINDOWTILE  = 4001;
  80 static const int IDM_WINDOWTILEHOR  = 4001;
  81 static const int IDM_WINDOWCASCADE = 4002;
  82 static const int IDM_WINDOWICONS = 4003;
  83 static const int IDM_WINDOWNEXT = 4004;
  84 static const int IDM_WINDOWTILEVERT = 4005;
  85
  86 // This range gives a maximum of 500 MDI children. Should be enough :-)
  87 static const int wxFIRST_MDI_CHILD = 4100;
  88 static const int wxLAST_MDI_CHILD = 4600;
  89
  90 // Status border dimensions
  91 static const int wxTHICK_LINE_BORDER = 3;
  92 static const int wxTHICK_LINE_WIDTH  = 1;
  93
  94 // ---------------------------------------------------------------------------
  95 // private functions
  96 // ---------------------------------------------------------------------------
  97
  98 // set the MDI menus (by sending the WM_MDISETMENU message) and update the menu
  99 // of the parent of win (which is supposed to be the MDI client window)
 100 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow);
 101
 102 // insert the window menu (subMenu) into menu just before "Help" submenu or at
 103 // the very end if not found
 104 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu);
 105
 106 // Remove the window menu
 107 static void RemoveWindowMenu(wxWindow *win, WXHMENU menu);
 108
 109 // is this an id of an MDI child?
 110 inline bool IsMdiCommandId(int id)
 111 {
 112     return (id >= wxFIRST_MDI_CHILD) && (id <= wxLAST_MDI_CHILD);
 113 }
 114
 115 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
 116                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact);
 117
 118 // ===========================================================================
 119 // implementation
 120 // ===========================================================================
 121
 122 // ---------------------------------------------------------------------------
 123 // wxWin macros
 124 // ---------------------------------------------------------------------------
 125
 126 IMPLEMENT_DYNAMIC_CLASS(wxMDIParentFrame, wxFrame)
 127 IMPLEMENT_DYNAMIC_CLASS(wxMDIChildFrame, wxFrame)
 128 IMPLEMENT_DYNAMIC_CLASS(wxMDIClientWindow, wxWindow)
 129
 130 BEGIN_EVENT_TABLE(wxMDIParentFrame, wxFrame)
 131     EVT_SIZE(wxMDIParentFrame::OnSize)
 132     EVT_SYS_COLOUR_CHANGED(wxMDIParentFrame::OnSysColourChanged)
 133 END_EVENT_TABLE()
 134
 135 BEGIN_EVENT_TABLE(wxMDIClientWindow, wxWindow)
 136     EVT_SCROLL(wxMDIClientWindow::OnScroll)
 137 END_EVENT_TABLE()
 138
 139 // ===========================================================================
 140 // wxMDIParentFrame: the frame which contains the client window which manages
 141 // the children
 142 // ===========================================================================
 143
 144 wxMDIParentFrame::wxMDIParentFrame()
 145 {
 146     m_clientWindow = NULL;
 147     m_currentChild = NULL;
 148     m_windowMenu = (wxMenu*) NULL;
 149     m_parentFrameActive = TRUE;
 150 }
 151
 152 bool wxMDIParentFrame::Create(wxWindow *parent,
 153                               wxWindowID id,
 154                               const wxString& title,
 155                               const wxPoint& pos,
 156                               const wxSize& size,
 157                               long style,
 158                               const wxString& name)
 159 {
 160   m_defaultIcon = (WXHICON) (wxSTD_MDIPARENTFRAME_ICON ? wxSTD_MDIPARENTFRAME_ICON : wxDEFAULT_MDIPARENTFRAME_ICON);
 161
 162   m_clientWindow = NULL;
 163   m_currentChild = NULL;
 164
 165   if (style & wxFRAME_NO_WINDOW_MENU)
 166       m_windowMenu = (wxMenu*) NULL;
 167   else
 168   {
 169   // m_windowMenu = (WXHMENU) ::LoadMenu(wxGetInstance(), wxT("wxWindowMenu"));
 170       m_windowMenu = new wxMenu;
 171
 172
 173       m_windowMenu->Append(4002, wxT("&Cascade"));
 174       m_windowMenu->Append(4001, wxT("Tile &Horizontally"));
 175       m_windowMenu->Append(4005, wxT("Tile &Vertically"));
 176       m_windowMenu->AppendSeparator();
 177       m_windowMenu->Append(4003, wxT("&Arrange Icons"));
 178       m_windowMenu->Append(4004, wxT("&Next"));
 179   }
 180
 181   m_parentFrameActive = TRUE;
 182
 183   if (!parent)
 184     wxTopLevelWindows.Append(this);
 185
 186   SetName(name);
 187   m_windowStyle = style;
 188
 189   if (parent) parent->AddChild(this);
 190
 191   if ( id > -1 )
 192     m_windowId = id;
 193   else
 194     m_windowId = (int)NewControlId();
 195
 196   int x = pos.x;
 197   int y = pos.y;
 198   int width = size.x;
 199   int height = size.y;
 200
 201   DWORD msflags = WS_OVERLAPPED;
 202   if (style & wxMINIMIZE_BOX)
 203     msflags |= WS_MINIMIZEBOX;
 204   if (style & wxMAXIMIZE_BOX)
 205     msflags |= WS_MAXIMIZEBOX;
 206   if (style & wxTHICK_FRAME)
 207     msflags |= WS_THICKFRAME;
 208   if (style & wxSYSTEM_MENU)
 209     msflags |= WS_SYSMENU;
 210   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 211     msflags |= WS_MINIMIZE;
 212   if (style & wxMAXIMIZE)
 213     msflags |= WS_MAXIMIZE;
 214   if (style & wxCAPTION)
 215     msflags |= WS_CAPTION;
 216
 217   if (style & wxCLIP_CHILDREN)
 218     msflags |= WS_CLIPCHILDREN;
 219
 220   wxWindow::MSWCreate(m_windowId, parent, wxMDIFrameClassName, this, title, x, y, width, height,
 221          msflags);
 222
 223   wxModelessWindows.Append(this);
 224
 225   return TRUE;
 226 }
 227
 228 wxMDIParentFrame::~wxMDIParentFrame()
 229 {
 230     DestroyChildren();
 231     // already delete by DestroyChildren()
 232     m_frameToolBar = NULL;
 233     m_frameStatusBar = NULL;
 234
 235     // ::DestroyMenu((HMENU)m_windowMenu);
 236     if (m_windowMenu)
 237     {
 238         delete m_windowMenu;
 239         m_windowMenu = (wxMenu*) NULL;
 240     }
 241
 242     if ( m_clientWindow )
 243     {
 244         if ( m_clientWindow->MSWGetOldWndProc() )
 245             m_clientWindow->UnsubclassWin();
 246
 247         m_clientWindow->SetHWND(0);
 248         delete m_clientWindow;
 249     }
 250 }
 251
 252 void wxMDIParentFrame::InternalSetMenuBar()
 253 {
 254 //    HMENU subMenu = GetSubMenu((HMENU) m_windowMenu, 0);
 255
 256     m_parentFrameActive = TRUE;
 257
 258     HMENU subMenu = (HMENU) 0;
 259     if (GetWindowMenu())
 260         subMenu = (HMENU) GetWindowMenu()->GetHMenu();
 261
 262     InsertWindowMenu(GetClientWindow(), m_hMenu, subMenu);
 263 }
 264
 265 void wxMDIParentFrame::SetWindowMenu(wxMenu* menu)
 266 {
 267     if (m_windowMenu)
 268     {
 269         if (GetMenuBar())
 270         {
 271             // Remove old window menu
 272             RemoveWindowMenu(GetClientWindow(), m_hMenu);
 273         }
 274
 275         delete m_windowMenu;
 276         m_windowMenu = (wxMenu*) NULL;
 277     }
 278     if (menu)
 279     {
 280         m_windowMenu = menu;
 281         if (GetMenuBar())
 282             InsertWindowMenu(GetClientWindow(), m_hMenu, (HMENU) m_windowMenu->GetHMenu());
 283     }
 284 }
 285
 286 void wxMDIParentFrame::OnSize(wxSizeEvent& event)
 287 {
 288     if ( GetClientWindow() )
 289     {
 290         int width, height;
 291         GetClientSize(&width, &height);
 292
 293         GetClientWindow()->SetSize(0, 0, width, height);
 294     }
 295 }
 296
 297 // Returns the active MDI child window
 298 wxMDIChildFrame *wxMDIParentFrame::GetActiveChild() const
 299 {
 300     HWND hWnd = (HWND)::SendMessage(GetWinHwnd(GetClientWindow()),
 301                                     WM_MDIGETACTIVE, 0, 0L);
 302     if ( hWnd == 0 )
 303         return NULL;
 304     else
 305         return (wxMDIChildFrame *)wxFindWinFromHandle((WXHWND) hWnd);
 306 }
 307
 308 // Create the client window class (don't Create the window, just return a new
 309 // class)
 310 wxMDIClientWindow *wxMDIParentFrame::OnCreateClient()
 311 {
 312     return new wxMDIClientWindow;
 313 }
 314
 315 // Responds to colour changes, and passes event on to children.
 316 void wxMDIParentFrame::OnSysColourChanged(wxSysColourChangedEvent& event)
 317 {
 318     if ( m_clientWindow )
 319     {
 320         m_clientWindow->SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE));
 321         m_clientWindow->Refresh();
 322     }
 323
 324     event.Skip();
 325 }
 326
 327 // ---------------------------------------------------------------------------
 328 // MDI operations
 329 // ---------------------------------------------------------------------------
 330
 331 void wxMDIParentFrame::Cascade()
 332 {
 333     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDICASCADE, 0, 0);
 334 }
 335
 336 // TODO: add a direction argument (hor/vert)
 337 void wxMDIParentFrame::Tile()
 338 {
 339     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDITILE, MDITILE_HORIZONTAL, 0);
 340 }
 341
 342 void wxMDIParentFrame::ArrangeIcons()
 343 {
 344     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDIICONARRANGE, 0, 0);
 345 }
 346
 347 void wxMDIParentFrame::ActivateNext()
 348 {
 349     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 0);
 350 }
 351
 352 void wxMDIParentFrame::ActivatePrevious()
 353 {
 354     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 1);
 355 }
 356
 357 // ---------------------------------------------------------------------------
 358 // the MDI parent frame window proc
 359 // ---------------------------------------------------------------------------
 360
 361 long wxMDIParentFrame::MSWWindowProc(WXUINT message,
 362                                      WXWPARAM wParam,
 363                                      WXLPARAM lParam)
 364 {
 365     long rc = 0;
 366     bool processed = FALSE;
 367
 368     switch ( message )
 369     {
 370         case WM_ACTIVATE:
 371             {
 372                 WXWORD state, minimized;
 373                 WXHWND hwnd;
 374                 UnpackActivate(wParam, lParam, &state, &minimized, &hwnd);
 375
 376                 processed = HandleActivate(state, minimized != 0, hwnd);
 377             }
 378             break;
 379
 380         case WM_COMMAND:
 381             {
 382                 WXWORD id, cmd;
 383                 WXHWND hwnd;
 384                 UnpackCommand(wParam, lParam, &id, &hwnd, &cmd);
 385
 386                 (void)HandleCommand(id, cmd, hwnd);
 387
 388                 // even if the frame didn't process it, there is no need to try it
 389                 // once again (i.e. call wxFrame::HandleCommand()) - we just dud it,
 390                 // so pretend we processed the message anyhow
 391                 processed = TRUE;
 392             }
 393
 394             // always pass this message DefFrameProc(), otherwise MDI menu
 395             // commands (and sys commands - more surprizingly!) won't work
 396             MSWDefWindowProc(message, wParam, lParam);
 397             break;
 398
 399         case WM_CREATE:
 400             m_clientWindow = OnCreateClient();
 401             // Uses own style for client style
 402             if ( !m_clientWindow->CreateClient(this, GetWindowStyleFlag()) )
 403             {
 404                 wxLogMessage(_("Failed to create MDI parent frame."));
 405
 406                 rc = -1;
 407             }
 408
 409             processed = TRUE;
 410             break;
 411
 412         case WM_ERASEBKGND:
 413             processed = TRUE;
 414
 415             // we erase background ourselves
 416             rc = TRUE;
 417             break;
 418
 419         case WM_MENUSELECT:
 420             {
 421                 WXWORD item, flags;
 422                 WXHMENU hmenu;
 423                 UnpackMenuSelect(wParam, lParam, &item, &flags, &hmenu);
 424
 425                 if ( m_parentFrameActive )
 426                 {
 427                     processed = HandleMenuSelect(item, flags, hmenu);
 428                 }
 429                 else if (m_currentChild)
 430                 {
 431                     processed = m_currentChild->
 432                         HandleMenuSelect(item, flags, hmenu);
 433                 }
 434             }
 435             break;
 436
 437         case WM_SIZE:
 438             // as we don't (usually) resize the MDI client to exactly fit the
 439             // client area (we put it below the toolbar, above statusbar &c),
 440             // we should not pass this one to DefFrameProc
 441             break;
 442     }
 443
 444     if ( !processed )
 445         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 446
 447     return rc;
 448 }
 449
 450 bool wxMDIParentFrame::HandleActivate(int state, bool minimized, WXHWND activate)
 451 {
 452     bool processed = FALSE;
 453
 454     if ( wxWindow::HandleActivate(state, minimized, activate) )
 455     {
 456         // already processed
 457         processed = TRUE;
 458     }
 459
 460     // If this window is an MDI parent, we must also send an OnActivate message
 461     // to the current child.
 462     if ( (m_currentChild != NULL) &&
 463          ((state == WA_ACTIVE) || (state == WA_CLICKACTIVE)) )
 464     {
 465         wxActivateEvent event(wxEVT_ACTIVATE, TRUE, m_currentChild->GetId());
 466         event.SetEventObject( m_currentChild );
 467         if ( m_currentChild->GetEventHandler()->ProcessEvent(event) )
 468             processed = TRUE;
 469     }
 470
 471     return processed;
 472 }
 473
 474 bool wxMDIParentFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 475 {
 476     // In case it's e.g. a toolbar.
 477     if ( hwnd )
 478     {
 479         wxWindow *win = wxFindWinFromHandle(hwnd);
 480         if ( win )
 481             return win->MSWCommand(cmd, id);
 482     }
 483
 484     // is it one of standard MDI commands?
 485     WXWPARAM wParam = 0;
 486     int msg;
 487     switch ( id )
 488     {
 489         case IDM_WINDOWCASCADE:
 490             msg = WM_MDICASCADE;
 491             wParam = MDITILE_SKIPDISABLED;
 492             break;
 493
 494         case IDM_WINDOWTILEHOR:
 495             wParam |= MDITILE_HORIZONTAL;
 496             // fall through
 497
 498         case IDM_WINDOWTILEVERT:
 499             if ( !wParam )
 500                 wParam = MDITILE_VERTICAL;
 501             msg = WM_MDITILE;
 502             wParam |= MDITILE_SKIPDISABLED;
 503             break;
 504
 505         case IDM_WINDOWICONS:
 506             msg = WM_MDIICONARRANGE;
 507             break;
 508
 509         case IDM_WINDOWNEXT:
 510             msg = WM_MDINEXT;
 511             break;
 512
 513         default:
 514             msg = 0;
 515     }
 516
 517     if ( msg )
 518     {
 519         ::SendMessage(GetWinHwnd(GetClientWindow()), msg, wParam, 0);
 520
 521         return TRUE;
 522     }
 523
 524     // FIXME VZ: what does this test do??
 525     if (id >= 0xF000)
 526     {
 527         return FALSE; // Get WndProc to call default proc
 528     }
 529
 530     if ( IsMdiCommandId(id) )
 531     {
 532         wxWindowList::Node* node = GetChildren().GetFirst();
 533         while ( node )
 534         {
 535             wxWindow* child = node->GetData();
 536             if ( child->GetHWND() )
 537             {
 538                 long childId = wxGetWindowId(child->GetHWND());
 539                 if (childId == (long)id)
 540                 {
 541                     ::SendMessage( GetWinHwnd(GetClientWindow()),
 542                                    WM_MDIACTIVATE,
 543                                    (WPARAM)child->GetHWND(), 0);
 544                     return TRUE;
 545                 }
 546             }
 547             node = node->GetNext();
 548         }
 549     }
 550     else if ( m_parentFrameActive )
 551     {
 552         return ProcessCommand(id);
 553     }
 554     else if ( m_currentChild )
 555     {
 556         return m_currentChild->HandleCommand(id, cmd, hwnd);
 557     }
 558     else
 559     {
 560         // this shouldn't happen because it means that our messages are being
 561         // lost (they're not sent to the parent frame nor to the children)
 562         wxFAIL_MSG(wxT("MDI parent frame is not active, "
 563                       "yet there is no active MDI child?"));
 564     }
 565
 566     return FALSE;
 567 }
 568
 569 long wxMDIParentFrame::MSWDefWindowProc(WXUINT message,
 570                                         WXWPARAM wParam,
 571                                         WXLPARAM lParam)
 572 {
 573     WXHWND clientWnd;
 574     if ( GetClientWindow() )
 575         clientWnd = GetClientWindow()->GetHWND();
 576     else
 577         clientWnd = 0;
 578
 579     return DefFrameProc(GetHwnd(), (HWND)clientWnd, message, wParam, lParam);
 580 }
 581
 582 bool wxMDIParentFrame::MSWTranslateMessage(WXMSG* msg)
 583 {
 584     MSG *pMsg = (MSG *)msg;
 585
 586     if ( m_currentChild && m_currentChild->GetHWND() &&
 587          m_currentChild->MSWTranslateMessage(msg) )
 588     {
 589         return TRUE;
 590     }
 591
 592     if ( m_acceleratorTable.Translate(this, msg) )
 593     {
 594         return TRUE;
 595     }
 596
 597     if ( pMsg->message == WM_KEYDOWN || pMsg->message == WM_SYSKEYDOWN )
 598     {
 599         if ( ::TranslateMDISysAccel(GetWinHwnd(GetClientWindow()), pMsg))
 600             return TRUE;
 601     }
 602
 603     return FALSE;
 604 }
 605
 606 // ===========================================================================
 607 // wxMDIChildFrame
 608 // ===========================================================================
 609
 610 wxMDIChildFrame::wxMDIChildFrame()
 611 {
 612 }
 613
 614 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 615                              wxWindowID id,
 616                              const wxString& title,
 617                              const wxPoint& pos,
 618                              const wxSize& size,
 619                              long style,
 620                              const wxString& name)
 621 {
 622   m_defaultIcon = (WXHICON)(wxSTD_MDICHILDFRAME_ICON ? wxSTD_MDICHILDFRAME_ICON
 623                                                      : wxDEFAULT_MDICHILDFRAME_ICON);
 624
 625   SetName(name);
 626
 627   if ( id > -1 )
 628     m_windowId = id;
 629   else
 630     m_windowId = (int)NewControlId();
 631
 632   if ( parent )
 633   {
 634       parent->AddChild(this);
 635   }
 636
 637   wxWndHook = this;
 638
 639   int x = pos.x;
 640   int y = pos.y;
 641   int width = size.x;
 642   int height = size.y;
 643
 644   MDICREATESTRUCT mcs;
 645
 646   mcs.szClass = wxMDIChildFrameClassName;
 647   mcs.szTitle = title;
 648   mcs.hOwner = wxGetInstance();
 649   if (x > -1)
 650       mcs.x = x;
 651   else
 652       mcs.x = CW_USEDEFAULT;
 653
 654   if (y > -1)
 655       mcs.y = y;
 656   else
 657       mcs.y = CW_USEDEFAULT;
 658
 659   if (width > -1)
 660       mcs.cx = width;
 661   else
 662       mcs.cx = CW_USEDEFAULT;
 663
 664   if (height > -1)
 665       mcs.cy = height;
 666   else
 667       mcs.cy = CW_USEDEFAULT;
 668
 669   DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN;
 670   if (style & wxMINIMIZE_BOX)
 671     msflags |= WS_MINIMIZEBOX;
 672   if (style & wxMAXIMIZE_BOX)
 673     msflags |= WS_MAXIMIZEBOX;
 674   if (style & wxTHICK_FRAME)
 675     msflags |= WS_THICKFRAME;
 676   if (style & wxSYSTEM_MENU)
 677     msflags |= WS_SYSMENU;
 678   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 679     msflags |= WS_MINIMIZE;
 680   if (style & wxMAXIMIZE)
 681     msflags |= WS_MAXIMIZE;
 682   if (style & wxCAPTION)
 683     msflags |= WS_CAPTION;
 684
 685   mcs.style = msflags;
 686
 687   mcs.lParam = 0;
 688
 689   DWORD Return = SendMessage(GetWinHwnd(parent->GetClientWindow()),
 690                              WM_MDICREATE, 0, (LONG)(LPSTR)&mcs);
 691
 692   //handle = (HWND)LOWORD(Return);
 693   // Must be the DWORRD for WIN32. And in 16 bits, HIWORD=0 (says Microsoft)
 694   m_hWnd = (WXHWND)Return;
 695
 696   wxWndHook = NULL;
 697   wxAssociateWinWithHandle((HWND) GetHWND(), this);
 698
 699   // VZ: what's this? an act of piracy?
 700   //SetWindowLong(GetHwnd(), 0, (long)this);
 701
 702   wxModelessWindows.Append(this);
 703   return TRUE;
 704 }
 705
 706 wxMDIChildFrame::~wxMDIChildFrame()
 707 {
 708     DestroyChildren();
 709
 710     // already delete by DestroyChildren()
 711     m_frameToolBar = NULL;
 712     m_frameStatusBar = NULL;
 713
 714     MSWDestroyWindow();
 715 }
 716
 717 // Set the client size (i.e. leave the calculation of borders etc.
 718 // to wxWindows)
 719 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 720 {
 721   HWND hWnd = GetHwnd();
 722
 723   RECT rect;
 724   ::GetClientRect(hWnd, &rect);
 725
 726   RECT rect2;
 727   GetWindowRect(hWnd, &rect2);
 728
 729   // Find the difference between the entire window (title bar and all)
 730   // and the client area; add this to the new client size to move the
 731   // window
 732   int actual_width = rect2.right - rect2.left - rect.right + width;
 733   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 734
 735   if (GetStatusBar() && GetStatusBar()->IsShown())
 736   {
 737     int sx, sy;
 738     GetStatusBar()->GetSize(&sx, &sy);
 739     actual_height += sy;
 740   }
 741
 742   POINT point;
 743   point.x = rect2.left;
 744   point.y = rect2.top;
 745
 746   // If there's an MDI parent, must subtract the parent's top left corner
 747   // since MoveWindow moves relative to the parent
 748   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 749   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 750
 751   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)TRUE);
 752
 753   wxSizeEvent event(wxSize(width, height), m_windowId);
 754   event.SetEventObject( this );
 755   GetEventHandler()->ProcessEvent(event);
 756 }
 757
 758 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 759 {
 760   RECT rect;
 761   GetWindowRect(GetHwnd(), &rect);
 762   POINT point;
 763   point.x = rect.left;
 764   point.y = rect.top;
 765
 766   // Since we now have the absolute screen coords,
 767   // if there's a parent we must subtract its top left corner
 768   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 769   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 770
 771   *x = point.x;
 772   *y = point.y;
 773 }
 774
 775 void wxMDIChildFrame::InternalSetMenuBar()
 776 {
 777     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 778
 779     // HMENU subMenu = GetSubMenu((HMENU)parent->GetWindowMenu(), 0);
 780     HMENU subMenu = (HMENU) 0;
 781     if (parent->GetWindowMenu())
 782         subMenu = (HMENU) parent->GetWindowMenu()->GetHMenu();
 783
 784     InsertWindowMenu(parent->GetClientWindow(), m_hMenu, subMenu);
 785
 786     parent->m_parentFrameActive = FALSE;
 787 }
 788
 789 // ---------------------------------------------------------------------------
 790 // MDI operations
 791 // ---------------------------------------------------------------------------
 792
 793 void wxMDIChildFrame::Maximize(bool maximize)
 794 {
 795     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 796     if ( parent && parent->GetClientWindow() )
 797     {
 798         ::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 799                       maximize ? WM_MDIMAXIMIZE : WM_MDIRESTORE,
 800                       (WPARAM)GetHwnd(), 0);
 801     }
 802 }
 803
 804 void wxMDIChildFrame::Restore()
 805 {
 806     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 807     if ( parent && parent->GetClientWindow() )
 808     {
 809         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIRESTORE,
 810                       (WPARAM) GetHwnd(), 0);
 811     }
 812 }
 813
 814 void wxMDIChildFrame::Activate()
 815 {
 816     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 817     if ( parent && parent->GetClientWindow() )
 818     {
 819         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIACTIVATE,
 820                       (WPARAM) GetHwnd(), 0);
 821     }
 822 }
 823
 824 // ---------------------------------------------------------------------------
 825 // MDI window proc and message handlers
 826 // ---------------------------------------------------------------------------
 827
 828 long wxMDIChildFrame::MSWWindowProc(WXUINT message,
 829                                     WXWPARAM wParam,
 830                                     WXLPARAM lParam)
 831 {
 832     long rc = 0;
 833     bool processed = FALSE;
 834
 835     switch ( message )
 836     {
 837         case WM_COMMAND:
 838             {
 839                 WORD id, cmd;
 840                 WXHWND hwnd;
 841                 UnpackCommand((WXWPARAM)wParam, (WXLPARAM)lParam,
 842                               &id, &hwnd, &cmd);
 843
 844                 processed = HandleCommand(id, cmd, (WXHWND)hwnd);
 845             }
 846             break;
 847
 848         case WM_GETMINMAXINFO:
 849             // let the default window proc calculate the size of MDI children
 850             // frames because it is based on the size of the MDI client window,
 851             // not on the values specified in wxWindow m_min/max variables
 852             return MSWDefWindowProc(message, wParam, lParam);
 853
 854         case WM_MDIACTIVATE:
 855             {
 856                 WXWORD act;
 857                 WXHWND hwndAct, hwndDeact;
 858                 UnpackMDIActivate(wParam, lParam, &act, &hwndAct, &hwndDeact);
 859
 860                 processed = HandleMDIActivate(act, hwndAct, hwndDeact);
 861             }
 862             // fall through
 863
 864         case WM_MOVE:
 865             // must pass WM_MOVE to DefMDIChildProc() to recalculate MDI client
 866             // scrollbars if necessary
 867
 868             // fall through
 869
 870         case WM_SIZE:
 871             // must pass WM_SIZE to DefMDIChildProc(), otherwise many weird
 872             // things happen
 873             MSWDefWindowProc(message, wParam, lParam);
 874             break;
 875
 876         case WM_SYSCOMMAND:
 877             // DefMDIChildProc handles SC_{NEXT/PREV}WINDOW here, so pass it
 878             // the message (the base class version does not)
 879             return MSWDefWindowProc(message, wParam, lParam);
 880
 881         case WM_WINDOWPOSCHANGING:
 882             processed = HandleWindowPosChanging((LPWINDOWPOS)lParam);
 883             break;
 884     }
 885
 886     if ( !processed )
 887         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 888
 889     return rc;
 890 }
 891
 892 bool wxMDIChildFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 893 {
 894     // In case it's e.g. a toolbar.
 895     if ( hwnd )
 896     {
 897         wxWindow *win = wxFindWinFromHandle(hwnd);
 898         if (win)
 899             return win->MSWCommand(cmd, id);
 900     }
 901
 902     if (wxCurrentPopupMenu)
 903     {
 904         wxMenu *popupMenu = wxCurrentPopupMenu;
 905         wxCurrentPopupMenu = NULL;
 906         if (popupMenu->MSWCommand(cmd, id))
 907             return TRUE;
 908     }
 909
 910     if (GetMenuBar() && GetMenuBar()->FindItem(id))
 911     {
 912         ProcessCommand(id);
 913         return TRUE;
 914     }
 915     else
 916         return FALSE;
 917
 918     return TRUE;
 919 }
 920
 921 bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
 922                                         WXHWND hwndAct,
 923                                         WXHWND hwndDeact)
 924 {
 925     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 926
 927     HMENU menuToSet = 0;
 928
 929     bool activated;
 930
 931     if ( m_hWnd == hwndAct )
 932     {
 933         activated = TRUE;
 934         parent->m_currentChild = this;
 935
 936         HMENU child_menu = (HMENU)GetWinMenu();
 937         if ( child_menu )
 938         {
 939             parent->m_parentFrameActive = FALSE;
 940
 941             menuToSet = child_menu;
 942         }
 943     }
 944     else if ( m_hWnd == hwndDeact )
 945     {
 946         wxASSERT_MSG( parent->m_currentChild == this,
 947                       wxT("can't deactivate MDI child which wasn't active!") );
 948
 949         activated = FALSE;
 950         parent->m_currentChild = NULL;
 951
 952         HMENU parent_menu = (HMENU)parent->GetWinMenu();
 953         if ( parent_menu )
 954         {
 955             parent->m_parentFrameActive = TRUE;
 956
 957             menuToSet = parent_menu;
 958         }
 959     }
 960     else
 961     {
 962         // we have nothing to do with it
 963         return FALSE;
 964     }
 965
 966     if ( menuToSet )
 967     {
 968         HMENU subMenu = (HMENU) 0;
 969         if (parent->GetWindowMenu())
 970             subMenu = (HMENU) parent->GetWindowMenu()->GetHMenu();
 971
 972         MDISetMenu(parent->GetClientWindow(), menuToSet, subMenu);
 973     }
 974
 975     wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
 976     event.SetEventObject( this );
 977
 978     return GetEventHandler()->ProcessEvent(event);
 979 }
 980
 981 bool wxMDIChildFrame::HandleWindowPosChanging(void *pos)
 982 {
 983     WINDOWPOS *lpPos = (WINDOWPOS *)pos;
 984 #if defined(__WIN95__)
 985     if (!(lpPos->flags & SWP_NOSIZE))
 986     {
 987         RECT rectClient;
 988         DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
 989         DWORD dwStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 990         if (ResetWindowStyle((void *) & rectClient) && (dwStyle & WS_MAXIMIZE))
 991         {
 992             ::AdjustWindowRectEx(&rectClient, dwStyle, FALSE, dwExStyle);
 993             lpPos->x = rectClient.left;
 994             lpPos->y = rectClient.top;
 995             lpPos->cx = rectClient.right - rectClient.left;
 996             lpPos->cy = rectClient.bottom - rectClient.top;
 997         }
 998         wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
 999         if (pFrameWnd && pFrameWnd->GetToolBar() && pFrameWnd->GetToolBar()->IsShown())
1000         {
1001             pFrameWnd->GetToolBar()->Refresh();
1002         }
1003     }
1004 #endif // Win95
1005
1006     return FALSE;
1007 }
1008
1009 // ---------------------------------------------------------------------------
1010 // MDI specific message translation/preprocessing
1011 // ---------------------------------------------------------------------------
1012
1013 long wxMDIChildFrame::MSWDefWindowProc(WXUINT message, WXUINT wParam, WXLPARAM lParam)
1014 {
1015     return DefMDIChildProc(GetHwnd(),
1016                            (UINT)message, (WPARAM)wParam, (LPARAM)lParam);
1017 }
1018
1019 bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
1020 {
1021     return m_acceleratorTable.Translate(GetParent(), msg);
1022 }
1023
1024 // ---------------------------------------------------------------------------
1025 // misc
1026 // ---------------------------------------------------------------------------
1027
1028 void wxMDIChildFrame::MSWDestroyWindow()
1029 {
1030     MSWDetachWindowMenu();
1031     invalidHandle = GetHwnd();
1032
1033     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
1034
1035     // Must make sure this handle is invalidated (set to NULL) since all sorts
1036     // of things could happen after the child client is destroyed, but before
1037     // the wxFrame is destroyed.
1038
1039     HWND oldHandle = (HWND)GetHWND();
1040     SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIDESTROY,
1041                 (WPARAM)oldHandle, 0);
1042
1043     if (parent->GetActiveChild() == (wxMDIChildFrame*) NULL)
1044         ResetWindowStyle((void*) NULL);
1045
1046     invalidHandle = 0;
1047
1048     if (m_hMenu)
1049     {
1050         ::DestroyMenu((HMENU) m_hMenu);
1051         m_hMenu = 0;
1052     }
1053     wxRemoveHandleAssociation(this);
1054     m_hWnd = 0;
1055 }
1056
1057 // Change the client window's extended style so we don't get a client edge
1058 // style when a child is maximised (a double border looks silly.)
1059 bool wxMDIChildFrame::ResetWindowStyle(void *vrect)
1060 {
1061 #if defined(__WIN95__)
1062     RECT *rect = (RECT *)vrect;
1063     wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
1064     wxMDIChildFrame* pChild = pFrameWnd->GetActiveChild();
1065     if (!pChild || (pChild == this))
1066     {
1067         DWORD dwStyle = ::GetWindowLong(GetWinHwnd(pFrameWnd->GetClientWindow()), GWL_EXSTYLE);
1068         DWORD dwThisStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1069         DWORD dwNewStyle = dwStyle;
1070         if (pChild != NULL && (dwThisStyle & WS_MAXIMIZE))
1071             dwNewStyle &= ~(WS_EX_CLIENTEDGE);
1072         else
1073             dwNewStyle |= WS_EX_CLIENTEDGE;
1074
1075         if (dwStyle != dwNewStyle)
1076         {
1077             HWND hwnd = GetWinHwnd(pFrameWnd->GetClientWindow());
1078             ::RedrawWindow(hwnd, NULL, NULL, RDW_INVALIDATE | RDW_ALLCHILDREN);
1079             ::SetWindowLong(hwnd, GWL_EXSTYLE, dwNewStyle);
1080             ::SetWindowPos(hwnd, NULL, 0, 0, 0, 0,
1081                            SWP_FRAMECHANGED | SWP_NOACTIVATE |
1082                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
1083                            SWP_NOCOPYBITS);
1084             if (rect)
1085                 ::GetClientRect(hwnd, rect);
1086
1087             return TRUE;
1088         }
1089     }
1090 #endif // Win95
1091
1092     return FALSE;
1093 }
1094
1095 // ===========================================================================
1096 // wxMDIClientWindow: the window of predefined (by Windows) class which
1097 // contains the child frames
1098 // ===========================================================================
1099
1100 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
1101 {
1102     m_backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE);
1103
1104     CLIENTCREATESTRUCT ccs;
1105     m_windowStyle = style;
1106     m_parent = parent;
1107
1108     ccs.hWindowMenu = (HMENU) 0;
1109     if (parent->GetWindowMenu())
1110         ccs.hWindowMenu = (HMENU) parent->GetWindowMenu()->GetHMenu();
1111     ccs.idFirstChild = wxFIRST_MDI_CHILD;
1112
1113     DWORD msStyle = WS_VISIBLE | WS_CHILD | WS_CLIPCHILDREN;
1114     if ( style & wxHSCROLL )
1115         msStyle |= WS_HSCROLL;
1116     if ( style & wxVSCROLL )
1117         msStyle |= WS_VSCROLL;
1118
1119 #if defined(__WIN95__)
1120     DWORD exStyle = WS_EX_CLIENTEDGE;
1121 #else
1122     DWORD exStyle = 0;
1123 #endif
1124
1125     wxWndHook = this;
1126     m_hWnd = (WXHWND)::CreateWindowEx
1127                        (
1128                         exStyle,
1129                         wxT("MDICLIENT"),
1130                         NULL,
1131                         msStyle,
1132                         0, 0, 0, 0,
1133                         GetWinHwnd(parent),
1134                         NULL,
1135                         wxGetInstance(),
1136                         (LPSTR)(LPCLIENTCREATESTRUCT)&ccs);
1137     if ( !m_hWnd )
1138     {
1139         wxLogLastError("CreateWindowEx(MDI client)");
1140
1141         return FALSE;
1142     }
1143
1144     SubclassWin(m_hWnd);
1145     wxWndHook = NULL;
1146
1147     return TRUE;
1148 }
1149
1150 // Explicitly call default scroll behaviour
1151 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
1152 {
1153     // Note: for client windows, the scroll position is not set in
1154     // WM_HSCROLL, WM_VSCROLL, so we can't easily determine what
1155     // scroll position we're at.
1156     // This makes it hard to paint patterns or bitmaps in the background,
1157     // and have the client area scrollable as well.
1158
1159     if ( event.GetOrientation() == wxHORIZONTAL )
1160         m_scrollX = event.GetPosition(); // Always returns zero!
1161     else
1162         m_scrollY = event.GetPosition(); // Always returns zero!
1163
1164     event.Skip();
1165 }
1166
1167 void wxMDIClientWindow::DoSetSize(int x, int y, int width, int height, int sizeFlags)
1168 {
1169     // Try to fix a problem whereby if you show an MDI child frame, then reposition the
1170     // client area, you can end up with a non-refreshed portion in the client window
1171     // (see OGL studio sample). So check if the position is changed and if so,
1172     // redraw the MDI child frames.
1173
1174     wxPoint oldPos = GetPosition();
1175
1176     wxWindow::DoSetSize(x, y, width, height, sizeFlags);
1177
1178     wxPoint newPos = GetPosition();
1179
1180     if ((newPos.x != oldPos.x) || (newPos.y != oldPos.y))
1181     {
1182         if (GetParent())
1183         {
1184             wxNode* node = GetParent()->GetChildren().First();
1185             while (node)
1186             {
1187                 wxWindow* child = (wxWindow*) node->Data();
1188                 if (child->IsKindOf(CLASSINFO(wxMDIChildFrame)))
1189                 {
1190                     HWND hWnd = (HWND) child->GetHWND();
1191                    ::RedrawWindow(hWnd, NULL, NULL, RDW_FRAME|RDW_ALLCHILDREN|RDW_INVALIDATE );
1192                 }
1193                 node = node->Next();
1194             }
1195         }
1196     }
1197 }
1198
1199 // ---------------------------------------------------------------------------
1200 // non member functions
1201 // ---------------------------------------------------------------------------
1202
1203 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow)
1204 {
1205     ::SendMessage(GetWinHwnd(win), WM_MDISETMENU,
1206 #ifdef __WIN32__
1207                   (WPARAM)hmenuFrame, (LPARAM)hmenuWindow);
1208 #else
1209                   0, MAKELPARAM(hmenuFrame, hmenuWindow));
1210 #endif
1211
1212     // update menu bar of the parent window
1213     wxWindow *parent = win->GetParent();
1214     wxCHECK_RET( parent, wxT("MDI client without parent frame? weird...") );
1215
1216     ::DrawMenuBar(GetWinHwnd(parent));
1217 }
1218
1219 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu)
1220 {
1221     // Try to insert Window menu in front of Help, otherwise append it.
1222     HMENU hmenu = (HMENU)menu;
1223
1224     if (subMenu)
1225     {
1226     int N = GetMenuItemCount(hmenu);
1227     bool success = FALSE;
1228     for ( int i = 0; i < N; i++ )
1229     {
1230         wxChar buf[256];
1231         int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1232         if ( chars == 0 )
1233         {
1234             wxLogLastError(wxT("GetMenuString"));
1235
1236             continue;
1237         }
1238
1239         if ( wxStripMenuCodes(wxString(buf)).IsSameAs(wxT("Help")) )
1240         {
1241             success = TRUE;
1242             ::InsertMenu(hmenu, i, MF_BYPOSITION | MF_POPUP | MF_STRING,
1243                          (UINT)subMenu, wxT("&Window"));
1244             break;
1245         }
1246     }
1247
1248     if ( !success )
1249     {
1250         ::AppendMenu(hmenu, MF_POPUP, (UINT)subMenu, wxT("&Window"));
1251     }
1252     }
1253
1254     MDISetMenu(win, hmenu, subMenu);
1255 }
1256
1257 static void RemoveWindowMenu(wxWindow *win, WXHMENU menu)
1258 {
1259     // Try to insert Window menu in front of Help, otherwise append it.
1260     HMENU hmenu = (HMENU)menu;
1261     int N = GetMenuItemCount(hmenu);
1262     bool success = FALSE;
1263     for ( int i = 0; i < N; i++ )
1264     {
1265         wxChar buf[256];
1266         int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1267         if ( chars == 0 )
1268         {
1269             wxLogLastError(wxT("GetMenuString"));
1270
1271             continue;
1272         }
1273
1274         if ( wxStripMenuCodes(wxString(buf)).IsSameAs(wxT("Window")) )
1275         {
1276             success = TRUE;
1277             ::RemoveMenu(hmenu, i, MF_BYPOSITION);
1278             break;
1279         }
1280     }
1281
1282     // Does passing 0 for the window menu really work with WM_MDISETMENU?
1283     MDISetMenu(win, hmenu, 0);
1284 }
1285
1286 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
1287                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact)
1288 {
1289 #ifdef __WIN32__
1290     *activate = TRUE;
1291     *hwndAct = (WXHWND)lParam;
1292     *hwndDeact = (WXHWND)wParam;
1293 #else // Win16
1294     *activate = (WXWORD)wParam;
1295     *hwndAct = (WXHWND)LOWORD(lParam);
1296     *hwndDeact = (WXHWND)HIWORD(lParam);
1297 #endif // Win32/Win16
1298 }