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     #include "wx/statusbr.h"
  39     #include "wx/settings.h"
  40     #include "wx/intl.h"
  41     #include "wx/log.h"
  42 #endif
  43
  44 #include "wx/mdi.h"
  45 #include "wx/msw/private.h"
  46
  47 #if wxUSE_NATIVE_STATUSBAR
  48     #include <wx/msw/statbr95.h>
  49 #endif
  50
  51 #include <string.h>
  52
  53 // ---------------------------------------------------------------------------
  54 // global variables
  55 // ---------------------------------------------------------------------------
  56
  57 extern wxWindowList wxModelessWindows;      // from dialog.cpp
  58 extern wxMenu *wxCurrentPopupMenu;
  59
  60 extern wxChar wxMDIFrameClassName[];
  61 extern wxChar wxMDIChildFrameClassName[];
  62 extern wxWindow *wxWndHook;                 // from window.cpp
  63
  64 extern wxList *wxWinHandleList;
  65
  66 static HWND invalidHandle = 0;
  67
  68 // ---------------------------------------------------------------------------
  69 // constants
  70 // ---------------------------------------------------------------------------
  71
  72 static const int IDM_WINDOWTILE  = 4001;
  73 static const int IDM_WINDOWTILEHOR  = 4001;
  74 static const int IDM_WINDOWCASCADE = 4002;
  75 static const int IDM_WINDOWICONS = 4003;
  76 static const int IDM_WINDOWNEXT = 4004;
  77 static const int IDM_WINDOWTILEVERT = 4005;
  78
  79 // This range gives a maximum of 500 MDI children. Should be enough :-)
  80 static const int wxFIRST_MDI_CHILD = 4100;
  81 static const int wxLAST_MDI_CHILD = 4600;
  82
  83 // Status border dimensions
  84 static const int wxTHICK_LINE_BORDER = 3;
  85 static const int wxTHICK_LINE_WIDTH  = 1;
  86
  87 // ---------------------------------------------------------------------------
  88 // private functions
  89 // ---------------------------------------------------------------------------
  90
  91 // set the MDI menus (by sending the WM_MDISETMENU message) and update the menu
  92 // of the parent of win (which is supposed to be the MDI client window)
  93 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow);
  94
  95 // insert the window menu (subMenu) into menu just before "Help" submenu or at
  96 // the very end if not found
  97 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu);
  98
  99 // is this an id of an MDI child?
 100 inline bool IsMdiCommandId(int id)
 101 {
 102     return (id >= wxFIRST_MDI_CHILD) && (id <= wxLAST_MDI_CHILD);
 103 }
 104
 105 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
 106                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact);
 107
 108 // ===========================================================================
 109 // implementation
 110 // ===========================================================================
 111
 112 // ---------------------------------------------------------------------------
 113 // wxWin macros
 114 // ---------------------------------------------------------------------------
 115
 116 #if !USE_SHARED_LIBRARY
 117     IMPLEMENT_DYNAMIC_CLASS(wxMDIParentFrame, wxFrame)
 118     IMPLEMENT_DYNAMIC_CLASS(wxMDIChildFrame, wxFrame)
 119     IMPLEMENT_DYNAMIC_CLASS(wxMDIClientWindow, wxWindow)
 120 #endif // USE_SHARED_LIBRARY
 121
 122 BEGIN_EVENT_TABLE(wxMDIParentFrame, wxFrame)
 123     EVT_SIZE(wxMDIParentFrame::OnSize)
 124     EVT_SYS_COLOUR_CHANGED(wxMDIParentFrame::OnSysColourChanged)
 125 END_EVENT_TABLE()
 126
 127 BEGIN_EVENT_TABLE(wxMDIClientWindow, wxWindow)
 128     EVT_SCROLL(wxMDIClientWindow::OnScroll)
 129 END_EVENT_TABLE()
 130
 131 // ===========================================================================
 132 // wxMDIParentFrame: the frame which contains the client window which manages
 133 // the children
 134 // ===========================================================================
 135
 136 wxMDIParentFrame::wxMDIParentFrame()
 137 {
 138     m_clientWindow = NULL;
 139     m_currentChild = NULL;
 140     m_windowMenu = 0;
 141     m_parentFrameActive = TRUE;
 142 }
 143
 144 bool wxMDIParentFrame::Create(wxWindow *parent,
 145                               wxWindowID id,
 146                               const wxString& title,
 147                               const wxPoint& pos,
 148                               const wxSize& size,
 149                               long style,
 150                               const wxString& name)
 151 {
 152   m_defaultIcon = (WXHICON) (wxSTD_MDIPARENTFRAME_ICON ? wxSTD_MDIPARENTFRAME_ICON : wxDEFAULT_MDIPARENTFRAME_ICON);
 153
 154   m_clientWindow = NULL;
 155   m_currentChild = NULL;
 156   m_windowMenu = 0;
 157   m_parentFrameActive = TRUE;
 158
 159   if (!parent)
 160     wxTopLevelWindows.Append(this);
 161
 162   SetName(name);
 163   m_windowStyle = style;
 164
 165   if (parent) parent->AddChild(this);
 166
 167   if ( id > -1 )
 168     m_windowId = id;
 169   else
 170     m_windowId = (int)NewControlId();
 171
 172   int x = pos.x;
 173   int y = pos.y;
 174   int width = size.x;
 175   int height = size.y;
 176
 177   m_windowMenu = (WXHMENU) ::LoadMenu(wxGetInstance(), _T("wxWindowMenu"));
 178
 179   DWORD msflags = WS_OVERLAPPED;
 180   if (style & wxMINIMIZE_BOX)
 181     msflags |= WS_MINIMIZEBOX;
 182   if (style & wxMAXIMIZE_BOX)
 183     msflags |= WS_MAXIMIZEBOX;
 184   if (style & wxTHICK_FRAME)
 185     msflags |= WS_THICKFRAME;
 186   if (style & wxSYSTEM_MENU)
 187     msflags |= WS_SYSMENU;
 188   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 189     msflags |= WS_MINIMIZE;
 190   if (style & wxMAXIMIZE)
 191     msflags |= WS_MAXIMIZE;
 192   if (style & wxCAPTION)
 193     msflags |= WS_CAPTION;
 194
 195   // Adding WS_CLIPCHILDREN causes children not to be properly
 196   // drawn when first displaying them.
 197 //  if (style & wxCLIP_CHILDREN)
 198 //    msflags |= WS_CLIPCHILDREN;
 199
 200   wxWindow::MSWCreate(m_windowId, parent, wxMDIFrameClassName, this, title, x, y, width, height,
 201          msflags);
 202
 203   wxModelessWindows.Append(this);
 204
 205   return TRUE;
 206 }
 207
 208 wxMDIParentFrame::~wxMDIParentFrame()
 209 {
 210     DestroyChildren();
 211
 212     ::DestroyMenu((HMENU)m_windowMenu);
 213     m_windowMenu = 0;
 214
 215     if ( m_clientWindow )
 216     {
 217         if ( m_clientWindow->MSWGetOldWndProc() )
 218             m_clientWindow->UnsubclassWin();
 219
 220         m_clientWindow->SetHWND(0);
 221         delete m_clientWindow;
 222     }
 223 }
 224
 225 void wxMDIParentFrame::InternalSetMenuBar()
 226 {
 227     HMENU subMenu = GetSubMenu((HMENU) m_windowMenu, 0);
 228
 229     m_parentFrameActive = TRUE;
 230
 231     InsertWindowMenu(GetClientWindow(), m_hMenu, subMenu);
 232 }
 233
 234 void wxMDIParentFrame::OnSize(wxSizeEvent& event)
 235 {
 236     if ( GetClientWindow() )
 237     {
 238         int width, height;
 239         GetClientSize(&width, &height);
 240
 241         GetClientWindow()->SetSize(0, 0, width, height);
 242     }
 243 }
 244
 245 // Returns the active MDI child window
 246 wxMDIChildFrame *wxMDIParentFrame::GetActiveChild() const
 247 {
 248     HWND hWnd = (HWND)::SendMessage(GetWinHwnd(GetClientWindow()),
 249                                     WM_MDIGETACTIVE, 0, 0L);
 250     if ( hWnd == 0 )
 251         return NULL;
 252     else
 253         return (wxMDIChildFrame *)wxFindWinFromHandle((WXHWND) hWnd);
 254 }
 255
 256 // Create the client window class (don't Create the window, just return a new
 257 // class)
 258 wxMDIClientWindow *wxMDIParentFrame::OnCreateClient()
 259 {
 260     return new wxMDIClientWindow;
 261 }
 262
 263 // Responds to colour changes, and passes event on to children.
 264 void wxMDIParentFrame::OnSysColourChanged(wxSysColourChangedEvent& event)
 265 {
 266     if ( m_clientWindow )
 267     {
 268         m_clientWindow->SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE));
 269         m_clientWindow->Refresh();
 270     }
 271
 272     event.Skip();
 273 }
 274
 275 // ---------------------------------------------------------------------------
 276 // MDI operations
 277 // ---------------------------------------------------------------------------
 278
 279 void wxMDIParentFrame::Cascade()
 280 {
 281     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDICASCADE, 0, 0);
 282 }
 283
 284 // TODO: add a direction argument (hor/vert)
 285 void wxMDIParentFrame::Tile()
 286 {
 287     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDITILE, MDITILE_HORIZONTAL, 0);
 288 }
 289
 290 void wxMDIParentFrame::ArrangeIcons()
 291 {
 292     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDIICONARRANGE, 0, 0);
 293 }
 294
 295 void wxMDIParentFrame::ActivateNext()
 296 {
 297     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 0);
 298 }
 299
 300 void wxMDIParentFrame::ActivatePrevious()
 301 {
 302     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 1);
 303 }
 304
 305 // ---------------------------------------------------------------------------
 306 // the MDI parent frame window proc
 307 // ---------------------------------------------------------------------------
 308
 309 long wxMDIParentFrame::MSWWindowProc(WXUINT message,
 310                                      WXWPARAM wParam,
 311                                      WXLPARAM lParam)
 312 {
 313     long rc = 0;
 314     bool processed = FALSE;
 315
 316     switch ( message )
 317     {
 318         case WM_ACTIVATE:
 319             {
 320                 WXWORD state, minimized;
 321                 WXHWND hwnd;
 322                 UnpackActivate(wParam, lParam, &state, &minimized, &hwnd);
 323
 324                 processed = HandleActivate(state, minimized != 0, hwnd);
 325             }
 326             break;
 327
 328         case WM_COMMAND:
 329             {
 330                 WXWORD id, cmd;
 331                 WXHWND hwnd;
 332                 UnpackCommand(wParam, lParam, &id, &hwnd, &cmd);
 333
 334                 (void)HandleCommand(id, cmd, hwnd);
 335
 336                 // even if the frame didn't process it, there is no need to try it
 337                 // once again (i.e. call wxFrame::HandleCommand()) - we just dud it,
 338                 // so pretend we processed the message anyhow
 339                 processed = TRUE;
 340             }
 341
 342             // always pass this message DefFrameProc(), otherwise MDI menu
 343             // commands (and sys commands - more surprizingly!) won't work
 344             MSWDefWindowProc(message, wParam, lParam);
 345             break;
 346
 347         case WM_CREATE:
 348             m_clientWindow = OnCreateClient();
 349             // Uses own style for client style
 350             if ( !m_clientWindow->CreateClient(this, GetWindowStyleFlag()) )
 351             {
 352                 wxLogMessage(_("Failed to create MDI parent frame."));
 353
 354                 rc = -1;
 355             }
 356
 357             processed = TRUE;
 358             break;
 359
 360         case WM_ERASEBKGND:
 361             processed = TRUE;
 362
 363             // we erase background ourselves
 364             rc = TRUE;
 365             break;
 366
 367         case WM_MENUSELECT:
 368             {
 369                 WXWORD item, flags;
 370                 WXHMENU hmenu;
 371                 UnpackMenuSelect(wParam, lParam, &item, &flags, &hmenu);
 372
 373                 if ( m_parentFrameActive )
 374                 {
 375                     processed = HandleMenuSelect(item, flags, hmenu);
 376                 }
 377                 else if (m_currentChild)
 378                 {
 379                     processed = m_currentChild->
 380                         HandleMenuSelect(item, flags, hmenu);
 381                 }
 382             }
 383             break;
 384
 385         case WM_SIZE:
 386             // we will leave this message to the base class version, but we
 387             // must pass it to DefFrameProc() too
 388             MSWDefWindowProc(message, wParam, lParam);
 389             break;
 390     }
 391
 392     if ( !processed )
 393         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 394
 395     return rc;
 396 }
 397
 398 bool wxMDIParentFrame::HandleActivate(int state, bool minimized, WXHWND activate)
 399 {
 400     bool processed = FALSE;
 401
 402     if ( wxWindow::HandleActivate(state, minimized, activate) )
 403     {
 404         // already processed
 405         processed = TRUE;
 406     }
 407
 408     // If this window is an MDI parent, we must also send an OnActivate message
 409     // to the current child.
 410     if ( (m_currentChild != NULL) &&
 411          ((state == WA_ACTIVE) || (state == WA_CLICKACTIVE)) )
 412     {
 413         wxActivateEvent event(wxEVT_ACTIVATE, TRUE, m_currentChild->GetId());
 414         event.SetEventObject( m_currentChild );
 415         if ( m_currentChild->GetEventHandler()->ProcessEvent(event) )
 416             processed = TRUE;
 417     }
 418
 419     return processed;
 420 }
 421
 422 bool wxMDIParentFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 423 {
 424     // In case it's e.g. a toolbar.
 425     if ( hwnd )
 426     {
 427         wxWindow *win = wxFindWinFromHandle(hwnd);
 428         if ( win )
 429             return win->MSWCommand(cmd, id);
 430     }
 431
 432     // is it one of standard MDI commands?
 433     WXWPARAM wParam = 0;
 434     int msg;
 435     switch ( id )
 436     {
 437         case IDM_WINDOWCASCADE:
 438             msg = WM_MDICASCADE;
 439             wParam = MDITILE_SKIPDISABLED;
 440             break;
 441
 442         case IDM_WINDOWTILEHOR:
 443             wParam |= MDITILE_HORIZONTAL;
 444             // fall through
 445
 446         case IDM_WINDOWTILEVERT:
 447             if ( !wParam )
 448                 wParam = MDITILE_VERTICAL;
 449             msg = WM_MDITILE;
 450             wParam |= MDITILE_SKIPDISABLED;
 451             break;
 452
 453         case IDM_WINDOWICONS:
 454             msg = WM_MDIICONARRANGE;
 455             break;
 456
 457         case IDM_WINDOWNEXT:
 458             msg = WM_MDINEXT;
 459             break;
 460
 461         default:
 462             msg = 0;
 463     }
 464
 465     if ( msg )
 466     {
 467         ::SendMessage(GetWinHwnd(GetClientWindow()), msg, wParam, 0);
 468
 469         return TRUE;
 470     }
 471
 472     // FIXME VZ: what does this test do??
 473     if (id >= 0xF000)
 474     {
 475         return FALSE; // Get WndProc to call default proc
 476     }
 477
 478     if ( IsMdiCommandId(id) )
 479     {
 480         wxWindowList::Node* node = GetChildren().GetFirst();
 481         while ( node )
 482         {
 483             wxWindow* child = node->GetData();
 484             if ( child->GetHWND() )
 485             {
 486                 long childId = wxGetWindowId(child->GetHWND());
 487                 if (childId == id)
 488                 {
 489                     ::SendMessage( GetWinHwnd(GetClientWindow()),
 490                                    WM_MDIACTIVATE,
 491                                    (WPARAM)child->GetHWND(), 0);
 492                     return TRUE;
 493                 }
 494             }
 495             node = node->GetNext();
 496         }
 497     }
 498     else if ( m_parentFrameActive )
 499     {
 500         return ProcessCommand(id);
 501     }
 502     else if ( m_currentChild )
 503     {
 504         return m_currentChild->HandleCommand(id, cmd, hwnd);
 505     }
 506     else
 507     {
 508         // this shouldn't happen because it means that our messages are being
 509         // lost (they're not sent to the parent frame nor to the children)
 510         wxFAIL_MSG(_T("MDI parent frame is not active, "
 511                       "yet there is no active MDI child?"));
 512     }
 513
 514     return FALSE;
 515 }
 516
 517 long wxMDIParentFrame::MSWDefWindowProc(WXUINT message,
 518                                         WXWPARAM wParam,
 519                                         WXLPARAM lParam)
 520 {
 521     WXHWND clientWnd;
 522     if ( GetClientWindow() )
 523         clientWnd = GetClientWindow()->GetHWND();
 524     else
 525         clientWnd = 0;
 526
 527     return DefFrameProc(GetHwnd(), (HWND)clientWnd, message, wParam, lParam);
 528 }
 529
 530 bool wxMDIParentFrame::MSWTranslateMessage(WXMSG* msg)
 531 {
 532     MSG *pMsg = (MSG *)msg;
 533
 534     if ( m_currentChild && m_currentChild->GetHWND() &&
 535          m_currentChild->MSWTranslateMessage(msg) )
 536     {
 537         return TRUE;
 538     }
 539
 540     if ( m_acceleratorTable.Ok() &&
 541          ::TranslateAccelerator(GetHwnd(),
 542                                 GetTableHaccel(m_acceleratorTable),
 543                                 pMsg) )
 544     {
 545         return TRUE;
 546     }
 547
 548     if ( pMsg->message == WM_KEYDOWN || pMsg->message == WM_SYSKEYDOWN )
 549     {
 550         if ( ::TranslateMDISysAccel(GetWinHwnd(GetClientWindow()), pMsg))
 551             return TRUE;
 552     }
 553
 554     return FALSE;
 555 }
 556
 557 // ===========================================================================
 558 // wxMDIChildFrame
 559 // ===========================================================================
 560
 561 wxMDIChildFrame::wxMDIChildFrame()
 562 {
 563 }
 564
 565 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 566                              wxWindowID id,
 567                              const wxString& title,
 568                              const wxPoint& pos,
 569                              const wxSize& size,
 570                              long style,
 571                              const wxString& name)
 572 {
 573   m_defaultIcon = (WXHICON)(wxSTD_MDICHILDFRAME_ICON ? wxSTD_MDICHILDFRAME_ICON
 574                                                      : wxDEFAULT_MDICHILDFRAME_ICON);
 575
 576   SetName(name);
 577
 578   if ( id > -1 )
 579     m_windowId = id;
 580   else
 581     m_windowId = (int)NewControlId();
 582
 583   if ( parent )
 584   {
 585       parent->AddChild(this);
 586   }
 587
 588   wxWndHook = this;
 589
 590   int x = pos.x;
 591   int y = pos.y;
 592   int width = size.x;
 593   int height = size.y;
 594
 595   MDICREATESTRUCT mcs;
 596
 597   mcs.szClass = wxMDIChildFrameClassName;
 598   mcs.szTitle = title;
 599   mcs.hOwner = wxGetInstance();
 600   if (x > -1)
 601       mcs.x = x;
 602   else
 603       mcs.x = CW_USEDEFAULT;
 604
 605   if (y > -1)
 606       mcs.y = y;
 607   else
 608       mcs.y = CW_USEDEFAULT;
 609
 610   if (width > -1)
 611       mcs.cx = width;
 612   else
 613       mcs.cx = CW_USEDEFAULT;
 614
 615   if (height > -1)
 616       mcs.cy = height;
 617   else
 618       mcs.cy = CW_USEDEFAULT;
 619
 620   DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN;
 621   if (style & wxMINIMIZE_BOX)
 622     msflags |= WS_MINIMIZEBOX;
 623   if (style & wxMAXIMIZE_BOX)
 624     msflags |= WS_MAXIMIZEBOX;
 625   if (style & wxTHICK_FRAME)
 626     msflags |= WS_THICKFRAME;
 627   if (style & wxSYSTEM_MENU)
 628     msflags |= WS_SYSMENU;
 629   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 630     msflags |= WS_MINIMIZE;
 631   if (style & wxMAXIMIZE)
 632     msflags |= WS_MAXIMIZE;
 633   if (style & wxCAPTION)
 634     msflags |= WS_CAPTION;
 635
 636   mcs.style = msflags;
 637
 638   mcs.lParam = 0;
 639
 640   DWORD Return = SendMessage(GetWinHwnd(parent->GetClientWindow()),
 641                              WM_MDICREATE, 0, (LONG)(LPSTR)&mcs);
 642
 643   //handle = (HWND)LOWORD(Return);
 644   // Must be the DWORRD for WIN32. And in 16 bits, HIWORD=0 (says Microsoft)
 645   m_hWnd = (WXHWND)Return;
 646
 647   wxWndHook = NULL;
 648   wxWinHandleList->Append((long)GetHWND(), this);
 649
 650   // VZ: what's this? an act of piracy?
 651   //SetWindowLong(GetHwnd(), 0, (long)this);
 652
 653   wxModelessWindows.Append(this);
 654   return TRUE;
 655 }
 656
 657 wxMDIChildFrame::~wxMDIChildFrame()
 658 {
 659     MSWDestroyWindow();
 660 }
 661
 662 // Set the client size (i.e. leave the calculation of borders etc.
 663 // to wxWindows)
 664 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 665 {
 666   HWND hWnd = GetHwnd();
 667
 668   RECT rect;
 669   ::GetClientRect(hWnd, &rect);
 670
 671   RECT rect2;
 672   GetWindowRect(hWnd, &rect2);
 673
 674   // Find the difference between the entire window (title bar and all)
 675   // and the client area; add this to the new client size to move the
 676   // window
 677   int actual_width = rect2.right - rect2.left - rect.right + width;
 678   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 679
 680   if (GetStatusBar())
 681   {
 682     int sx, sy;
 683     GetStatusBar()->GetSize(&sx, &sy);
 684     actual_height += sy;
 685   }
 686
 687   POINT point;
 688   point.x = rect2.left;
 689   point.y = rect2.top;
 690
 691   // If there's an MDI parent, must subtract the parent's top left corner
 692   // since MoveWindow moves relative to the parent
 693   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 694   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 695
 696   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)TRUE);
 697
 698   wxSizeEvent event(wxSize(width, height), m_windowId);
 699   event.SetEventObject( this );
 700   GetEventHandler()->ProcessEvent(event);
 701 }
 702
 703 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 704 {
 705   RECT rect;
 706   GetWindowRect(GetHwnd(), &rect);
 707   POINT point;
 708   point.x = rect.left;
 709   point.y = rect.top;
 710
 711   // Since we now have the absolute screen coords,
 712   // if there's a parent we must subtract its top left corner
 713   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 714   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 715
 716   *x = point.x;
 717   *y = point.y;
 718 }
 719
 720 void wxMDIChildFrame::InternalSetMenuBar()
 721 {
 722     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 723
 724     HMENU subMenu = GetSubMenu((HMENU)parent->GetWindowMenu(), 0);
 725
 726     InsertWindowMenu(parent->GetClientWindow(), m_hMenu, subMenu);
 727
 728     parent->m_parentFrameActive = FALSE;
 729 }
 730
 731 // ---------------------------------------------------------------------------
 732 // MDI operations
 733 // ---------------------------------------------------------------------------
 734
 735 void wxMDIChildFrame::Maximize()
 736 {
 737     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 738     if ( parent && parent->GetClientWindow() )
 739         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIMAXIMIZE, (WPARAM) GetHwnd(), 0);
 740 }
 741
 742 void wxMDIChildFrame::Restore()
 743 {
 744     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 745     if ( parent && parent->GetClientWindow() )
 746         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIRESTORE, (WPARAM) GetHwnd(), 0);
 747 }
 748
 749 void wxMDIChildFrame::Activate()
 750 {
 751     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 752     if ( parent && parent->GetClientWindow() )
 753         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIACTIVATE, (WPARAM) GetHwnd(), 0);
 754 }
 755
 756 // ---------------------------------------------------------------------------
 757 // MDI window proc and message handlers
 758 // ---------------------------------------------------------------------------
 759
 760 long wxMDIChildFrame::MSWWindowProc(WXUINT message,
 761                                     WXWPARAM wParam,
 762                                     WXLPARAM lParam)
 763 {
 764     long rc = 0;
 765     bool processed = FALSE;
 766
 767     switch ( message )
 768     {
 769         case WM_COMMAND:
 770             {
 771                 WORD id, cmd;
 772                 WXHWND hwnd;
 773                 UnpackCommand((WXWPARAM)wParam, (WXLPARAM)lParam,
 774                               &id, &hwnd, &cmd);
 775
 776                 processed = HandleCommand(id, cmd, (WXHWND)hwnd);
 777             }
 778             break;
 779
 780         case WM_GETMINMAXINFO:
 781             // let the default window proc calculate the size of MDI children
 782             // frames because it is based on the size of the MDI client window,
 783             // not on the values specified in wxWindow m_min/max variables
 784             return MSWDefWindowProc(message, wParam, lParam);
 785
 786         case WM_MDIACTIVATE:
 787             {
 788                 WXWORD act;
 789                 WXHWND hwndAct, hwndDeact;
 790                 UnpackMDIActivate(wParam, lParam, &act, &hwndAct, &hwndDeact);
 791
 792                 processed = HandleMDIActivate(act, hwndAct, hwndDeact);
 793             }
 794             // fall through
 795
 796         case WM_MOVE:
 797             // must pass WM_MOVE to DefMDIChildProc() to recalculate MDI client
 798             // scrollbars if necessary
 799
 800             // fall through
 801
 802         case WM_SIZE:
 803             // must pass WM_SIZE to DefMDIChildProc(), otherwise many weird
 804             // things happen
 805             MSWDefWindowProc(message, wParam, lParam);
 806             break;
 807
 808         case WM_SYSCOMMAND:
 809             // DefMDIChildProc handles SC_{NEXT/PREV}WINDOW here, so pass it
 810             // the message (the base class version does not)
 811             return MSWDefWindowProc(message, wParam, lParam);
 812
 813         case WM_WINDOWPOSCHANGING:
 814             processed = HandleWindowPosChanging((LPWINDOWPOS)lParam);
 815             break;
 816     }
 817
 818     if ( !processed )
 819         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 820
 821     return rc;
 822 }
 823
 824 bool wxMDIChildFrame::HandleSize(int x, int y, WXUINT id)
 825 {
 826     HWND hwnd = GetHwnd();
 827
 828     if ( !hwnd || hwnd == invalidHandle )
 829     {
 830         return FALSE;
 831     }
 832
 833     switch (id)
 834     {
 835         case SIZEFULLSCREEN:
 836         case SIZENORMAL:
 837             m_iconized = FALSE;
 838             break;
 839
 840         case SIZEICONIC:
 841             m_iconized = TRUE;
 842             break;
 843     }
 844
 845     if ( !m_iconized )
 846     {
 847         // forward WM_SIZE to status bar control
 848 #if wxUSE_NATIVE_STATUSBAR
 849         if (m_frameStatusBar && m_frameStatusBar->IsKindOf(CLASSINFO(wxStatusBar95)))
 850         {
 851             wxSizeEvent event(wxSize(x, y), m_frameStatusBar->GetId());
 852             event.SetEventObject( m_frameStatusBar );
 853
 854             ((wxStatusBar95 *)m_frameStatusBar)->OnSize(event);
 855         }
 856 #endif // wxUSE_NATIVE_STATUSBAR
 857
 858         PositionStatusBar();
 859         PositionToolBar();
 860
 861         return wxWindow::HandleSize(x, y, id);
 862     }
 863     else
 864     {
 865         return FALSE;
 866     }
 867 }
 868
 869 bool wxMDIChildFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 870 {
 871     // In case it's e.g. a toolbar.
 872     if ( hwnd )
 873     {
 874         wxWindow *win = wxFindWinFromHandle(hwnd);
 875         if (win)
 876             return win->MSWCommand(cmd, id);
 877     }
 878
 879     if (wxCurrentPopupMenu)
 880     {
 881         wxMenu *popupMenu = wxCurrentPopupMenu;
 882         wxCurrentPopupMenu = NULL;
 883         if (popupMenu->MSWCommand(cmd, id))
 884             return TRUE;
 885     }
 886
 887     if (GetMenuBar() && GetMenuBar()->FindItemForId(id))
 888     {
 889         ProcessCommand(id);
 890         return TRUE;
 891     }
 892     else
 893         return FALSE;
 894
 895     return TRUE;
 896 }
 897
 898 bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
 899                                         WXHWND hwndAct,
 900                                         WXHWND hwndDeact)
 901 {
 902     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 903
 904     HMENU menuToSet = 0;
 905
 906     bool activated;
 907
 908     if ( m_hWnd == hwndAct )
 909     {
 910         activated = TRUE;
 911         parent->m_currentChild = this;
 912
 913         HMENU child_menu = (HMENU)GetWinMenu();
 914         if ( child_menu )
 915         {
 916             parent->m_parentFrameActive = FALSE;
 917
 918             menuToSet = child_menu;
 919         }
 920     }
 921     else if ( m_hWnd == hwndDeact )
 922     {
 923         wxASSERT_MSG( parent->m_currentChild == this,
 924                       _T("can't deactivate MDI child which wasn't active!") );
 925
 926         activated = FALSE;
 927         parent->m_currentChild = NULL;
 928
 929         HMENU parent_menu = (HMENU)parent->GetWinMenu();
 930         if ( parent_menu )
 931         {
 932             parent->m_parentFrameActive = TRUE;
 933
 934             menuToSet = parent_menu;
 935         }
 936     }
 937     else
 938     {
 939         // we have nothing to with it
 940         return FALSE;
 941     }
 942
 943     if ( menuToSet )
 944     {
 945         HMENU subMenu = GetSubMenu((HMENU) parent->GetWindowMenu(), 0);
 946
 947         MDISetMenu(parent->GetClientWindow(), menuToSet, subMenu);
 948     }
 949
 950     wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
 951     event.SetEventObject( this );
 952
 953     return GetEventHandler()->ProcessEvent(event);
 954 }
 955
 956 bool wxMDIChildFrame::HandleWindowPosChanging(void *pos)
 957 {
 958     WINDOWPOS *lpPos = (WINDOWPOS *)pos;
 959 #if defined(__WIN95__)
 960     if (!(lpPos->flags & SWP_NOSIZE))
 961     {
 962         RECT rectClient;
 963         DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
 964         DWORD dwStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 965         if (ResetWindowStyle((void *) & rectClient) && (dwStyle & WS_MAXIMIZE))
 966         {
 967             ::AdjustWindowRectEx(&rectClient, dwStyle, FALSE, dwExStyle);
 968             lpPos->x = rectClient.left;
 969             lpPos->y = rectClient.top;
 970             lpPos->cx = rectClient.right - rectClient.left;
 971             lpPos->cy = rectClient.bottom - rectClient.top;
 972         }
 973         wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
 974         if (pFrameWnd && pFrameWnd->GetToolBar())
 975         {
 976             pFrameWnd->GetToolBar()->Refresh();
 977         }
 978     }
 979 #endif // Win95
 980
 981     return FALSE;
 982 }
 983
 984 // ---------------------------------------------------------------------------
 985 // MDI specific message translation/preprocessing
 986 // ---------------------------------------------------------------------------
 987
 988 long wxMDIChildFrame::MSWDefWindowProc(WXUINT message, WXUINT wParam, WXLPARAM lParam)
 989 {
 990     return DefMDIChildProc(GetHwnd(),
 991                            (UINT)message, (WPARAM)wParam, (LPARAM)lParam);
 992 }
 993
 994 bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
 995 {
 996     MSG *pMsg = (MSG *)msg;
 997     if ( m_acceleratorTable.Ok() )
 998     {
 999         return ::TranslateAccelerator(GetWinHwnd(GetParent()),
1000                                       GetTableHaccel(m_acceleratorTable),
1001                                       pMsg) != 0;
1002     }
1003
1004     return FALSE;
1005 }
1006
1007 // ---------------------------------------------------------------------------
1008 // misc
1009 // ---------------------------------------------------------------------------
1010
1011 void wxMDIChildFrame::MSWDestroyWindow()
1012 {
1013     MSWDetachWindowMenu();
1014     invalidHandle = GetHwnd();
1015
1016     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
1017
1018     // Must make sure this handle is invalidated (set to NULL) since all sorts
1019     // of things could happen after the child client is destroyed, but before
1020     // the wxFrame is destroyed.
1021
1022     HWND oldHandle = (HWND)GetHWND();
1023     SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIDESTROY,
1024                 (WPARAM)oldHandle, 0);
1025     invalidHandle = 0;
1026
1027     if (m_hMenu)
1028     {
1029         ::DestroyMenu((HMENU) m_hMenu);
1030         m_hMenu = 0;
1031     }
1032     m_hWnd = 0;
1033 }
1034
1035 // Change the client window's extended style so we don't get a client edge
1036 // style when a child is maximised (a double border looks silly.)
1037 bool wxMDIChildFrame::ResetWindowStyle(void *vrect)
1038 {
1039 #if defined(__WIN95__)
1040     RECT *rect = (RECT *)vrect;
1041     wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
1042     wxMDIChildFrame* pChild = pFrameWnd->GetActiveChild();
1043     if (!pChild || (pChild == this))
1044     {
1045         DWORD dwStyle = ::GetWindowLong(GetWinHwnd(pFrameWnd->GetClientWindow()), GWL_EXSTYLE);
1046         DWORD dwThisStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1047         DWORD dwNewStyle = dwStyle;
1048         if (pChild != NULL && (dwThisStyle & WS_MAXIMIZE))
1049             dwNewStyle &= ~(WS_EX_CLIENTEDGE);
1050         else
1051             dwNewStyle |= WS_EX_CLIENTEDGE;
1052
1053         if (dwStyle != dwNewStyle)
1054         {
1055             HWND hwnd = GetWinHwnd(pFrameWnd->GetClientWindow());
1056             ::RedrawWindow(hwnd, NULL, NULL, RDW_INVALIDATE | RDW_ALLCHILDREN);
1057             ::SetWindowLong(hwnd, GWL_EXSTYLE, dwNewStyle);
1058             ::SetWindowPos(hwnd, NULL, 0, 0, 0, 0,
1059                            SWP_FRAMECHANGED | SWP_NOACTIVATE |
1060                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
1061                            SWP_NOCOPYBITS);
1062             if (rect)
1063                 ::GetClientRect(hwnd, rect);
1064
1065             return TRUE;
1066         }
1067     }
1068 #endif // Win95
1069
1070     return FALSE;
1071 }
1072
1073 // ===========================================================================
1074 // wxMDIClientWindow: the window of predefined (by Windows) class which
1075 // contains the child frames
1076 // ===========================================================================
1077
1078 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
1079 {
1080     m_backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE);
1081
1082     CLIENTCREATESTRUCT ccs;
1083     m_windowStyle = style;
1084     m_parent = parent;
1085
1086     ccs.hWindowMenu = (HMENU)parent->GetWindowMenu();
1087     ccs.idFirstChild = wxFIRST_MDI_CHILD;
1088
1089     DWORD msStyle = WS_VISIBLE | WS_CHILD | WS_CLIPCHILDREN;
1090     if ( style & wxHSCROLL )
1091         msStyle |= WS_HSCROLL;
1092     if ( style & wxVSCROLL )
1093         msStyle |= WS_VSCROLL;
1094
1095 #if defined(__WIN95__)
1096     DWORD exStyle = WS_EX_CLIENTEDGE;
1097 #else
1098     DWORD exStyle = 0;
1099 #endif
1100
1101     wxWndHook = this;
1102     m_hWnd = (WXHWND)::CreateWindowEx
1103                        (
1104                         exStyle,
1105                         _T("MDICLIENT"),
1106                         NULL,
1107                         msStyle,
1108                         0, 0, 0, 0,
1109                         GetWinHwnd(parent),
1110                         NULL,
1111                         wxGetInstance(),
1112                         (LPSTR)(LPCLIENTCREATESTRUCT)&ccs);
1113     if ( !m_hWnd )
1114     {
1115         wxLogLastError("CreateWindowEx(MDI client)");
1116
1117         return FALSE;
1118     }
1119
1120     SubclassWin(m_hWnd);
1121     wxWndHook = NULL;
1122
1123     return TRUE;
1124 }
1125
1126 // Explicitly call default scroll behaviour
1127 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
1128 {
1129     // Note: for client windows, the scroll position is not set in
1130     // WM_HSCROLL, WM_VSCROLL, so we can't easily determine what
1131     // scroll position we're at.
1132     // This makes it hard to paint patterns or bitmaps in the background,
1133     // and have the client area scrollable as well.
1134
1135     if ( event.GetOrientation() == wxHORIZONTAL )
1136         m_scrollX = event.GetPosition(); // Always returns zero!
1137     else
1138         m_scrollY = event.GetPosition(); // Always returns zero!
1139
1140     event.Skip();
1141 }
1142
1143 // ---------------------------------------------------------------------------
1144 // non member functions
1145 // ---------------------------------------------------------------------------
1146
1147 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow)
1148 {
1149     ::SendMessage(GetWinHwnd(win), WM_MDISETMENU,
1150 #ifdef __WIN32__
1151                   (WPARAM)hmenuFrame, (LPARAM)hmenuWindow);
1152 #else
1153                   0, MAKELPARAM(hmenuFrame, hmenuWindow));
1154 #endif
1155
1156     // update menu bar of the parent window
1157     wxWindow *parent = win->GetParent();
1158     wxCHECK_RET( parent, _T("MDI client without parent frame? weird...") );
1159
1160     ::DrawMenuBar(GetWinHwnd(parent));
1161 }
1162
1163 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu)
1164 {
1165     // Try to insert Window menu in front of Help, otherwise append it.
1166     HMENU hmenu = (HMENU)menu;
1167     int N = GetMenuItemCount(hmenu);
1168     bool success = FALSE;
1169     for ( int i = 0; i < N; i++ )
1170     {
1171         wxChar buf[256];
1172         int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1173         if ( chars == 0 )
1174         {
1175             wxLogLastError(_T("GetMenuString"));
1176
1177             continue;
1178         }
1179
1180         if ( wxStripMenuCodes(wxString(buf)).IsSameAs(_T("Help")) )
1181         {
1182             success = TRUE;
1183             ::InsertMenu(hmenu, i, MF_BYPOSITION | MF_POPUP | MF_STRING,
1184                          (UINT)subMenu, _T("&Window"));
1185             break;
1186         }
1187     }
1188
1189     if ( !success )
1190     {
1191         ::AppendMenu(hmenu, MF_POPUP, (UINT)subMenu, _T("&Window"));
1192     }
1193
1194     MDISetMenu(win, hmenu, subMenu);
1195 }
1196
1197 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
1198                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact)
1199 {
1200 #ifdef __WIN32__
1201     *activate = TRUE;
1202     *hwndAct = (WXHWND)lParam;
1203     *hwndDeact = (WXHWND)wParam;
1204 #else // Win16
1205     *activate = (WXWORD)wParam;
1206     *hwndAct = (WXHWND)LOWORD(lParam);
1207     *hwndDeact = (WXHWND)HIWORD(lParam);
1208 #endif // Win32/Win16
1209 }