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.Translate(this, msg) )
 541     {
 542         return TRUE;
 543     }
 544
 545     if ( pMsg->message == WM_KEYDOWN || pMsg->message == WM_SYSKEYDOWN )
 546     {
 547         if ( ::TranslateMDISysAccel(GetWinHwnd(GetClientWindow()), pMsg))
 548             return TRUE;
 549     }
 550
 551     return FALSE;
 552 }
 553
 554 // ===========================================================================
 555 // wxMDIChildFrame
 556 // ===========================================================================
 557
 558 wxMDIChildFrame::wxMDIChildFrame()
 559 {
 560 }
 561
 562 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 563                              wxWindowID id,
 564                              const wxString& title,
 565                              const wxPoint& pos,
 566                              const wxSize& size,
 567                              long style,
 568                              const wxString& name)
 569 {
 570   m_defaultIcon = (WXHICON)(wxSTD_MDICHILDFRAME_ICON ? wxSTD_MDICHILDFRAME_ICON
 571                                                      : wxDEFAULT_MDICHILDFRAME_ICON);
 572
 573   SetName(name);
 574
 575   if ( id > -1 )
 576     m_windowId = id;
 577   else
 578     m_windowId = (int)NewControlId();
 579
 580   if ( parent )
 581   {
 582       parent->AddChild(this);
 583   }
 584
 585   wxWndHook = this;
 586
 587   int x = pos.x;
 588   int y = pos.y;
 589   int width = size.x;
 590   int height = size.y;
 591
 592   MDICREATESTRUCT mcs;
 593
 594   mcs.szClass = wxMDIChildFrameClassName;
 595   mcs.szTitle = title;
 596   mcs.hOwner = wxGetInstance();
 597   if (x > -1)
 598       mcs.x = x;
 599   else
 600       mcs.x = CW_USEDEFAULT;
 601
 602   if (y > -1)
 603       mcs.y = y;
 604   else
 605       mcs.y = CW_USEDEFAULT;
 606
 607   if (width > -1)
 608       mcs.cx = width;
 609   else
 610       mcs.cx = CW_USEDEFAULT;
 611
 612   if (height > -1)
 613       mcs.cy = height;
 614   else
 615       mcs.cy = CW_USEDEFAULT;
 616
 617   DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN;
 618   if (style & wxMINIMIZE_BOX)
 619     msflags |= WS_MINIMIZEBOX;
 620   if (style & wxMAXIMIZE_BOX)
 621     msflags |= WS_MAXIMIZEBOX;
 622   if (style & wxTHICK_FRAME)
 623     msflags |= WS_THICKFRAME;
 624   if (style & wxSYSTEM_MENU)
 625     msflags |= WS_SYSMENU;
 626   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 627     msflags |= WS_MINIMIZE;
 628   if (style & wxMAXIMIZE)
 629     msflags |= WS_MAXIMIZE;
 630   if (style & wxCAPTION)
 631     msflags |= WS_CAPTION;
 632
 633   mcs.style = msflags;
 634
 635   mcs.lParam = 0;
 636
 637   DWORD Return = SendMessage(GetWinHwnd(parent->GetClientWindow()),
 638                              WM_MDICREATE, 0, (LONG)(LPSTR)&mcs);
 639
 640   //handle = (HWND)LOWORD(Return);
 641   // Must be the DWORRD for WIN32. And in 16 bits, HIWORD=0 (says Microsoft)
 642   m_hWnd = (WXHWND)Return;
 643
 644   wxWndHook = NULL;
 645   wxWinHandleList->Append((long)GetHWND(), this);
 646
 647   // VZ: what's this? an act of piracy?
 648   //SetWindowLong(GetHwnd(), 0, (long)this);
 649
 650   wxModelessWindows.Append(this);
 651   return TRUE;
 652 }
 653
 654 wxMDIChildFrame::~wxMDIChildFrame()
 655 {
 656     MSWDestroyWindow();
 657 }
 658
 659 // Set the client size (i.e. leave the calculation of borders etc.
 660 // to wxWindows)
 661 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 662 {
 663   HWND hWnd = GetHwnd();
 664
 665   RECT rect;
 666   ::GetClientRect(hWnd, &rect);
 667
 668   RECT rect2;
 669   GetWindowRect(hWnd, &rect2);
 670
 671   // Find the difference between the entire window (title bar and all)
 672   // and the client area; add this to the new client size to move the
 673   // window
 674   int actual_width = rect2.right - rect2.left - rect.right + width;
 675   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 676
 677   if (GetStatusBar())
 678   {
 679     int sx, sy;
 680     GetStatusBar()->GetSize(&sx, &sy);
 681     actual_height += sy;
 682   }
 683
 684   POINT point;
 685   point.x = rect2.left;
 686   point.y = rect2.top;
 687
 688   // If there's an MDI parent, must subtract the parent's top left corner
 689   // since MoveWindow moves relative to the parent
 690   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 691   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 692
 693   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)TRUE);
 694
 695   wxSizeEvent event(wxSize(width, height), m_windowId);
 696   event.SetEventObject( this );
 697   GetEventHandler()->ProcessEvent(event);
 698 }
 699
 700 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 701 {
 702   RECT rect;
 703   GetWindowRect(GetHwnd(), &rect);
 704   POINT point;
 705   point.x = rect.left;
 706   point.y = rect.top;
 707
 708   // Since we now have the absolute screen coords,
 709   // if there's a parent we must subtract its top left corner
 710   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 711   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 712
 713   *x = point.x;
 714   *y = point.y;
 715 }
 716
 717 void wxMDIChildFrame::InternalSetMenuBar()
 718 {
 719     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 720
 721     HMENU subMenu = GetSubMenu((HMENU)parent->GetWindowMenu(), 0);
 722
 723     InsertWindowMenu(parent->GetClientWindow(), m_hMenu, subMenu);
 724
 725     parent->m_parentFrameActive = FALSE;
 726 }
 727
 728 // ---------------------------------------------------------------------------
 729 // MDI operations
 730 // ---------------------------------------------------------------------------
 731
 732 void wxMDIChildFrame::Maximize()
 733 {
 734     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 735     if ( parent && parent->GetClientWindow() )
 736         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIMAXIMIZE, (WPARAM) GetHwnd(), 0);
 737 }
 738
 739 void wxMDIChildFrame::Restore()
 740 {
 741     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 742     if ( parent && parent->GetClientWindow() )
 743         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIRESTORE, (WPARAM) GetHwnd(), 0);
 744 }
 745
 746 void wxMDIChildFrame::Activate()
 747 {
 748     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 749     if ( parent && parent->GetClientWindow() )
 750         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIACTIVATE, (WPARAM) GetHwnd(), 0);
 751 }
 752
 753 // ---------------------------------------------------------------------------
 754 // MDI window proc and message handlers
 755 // ---------------------------------------------------------------------------
 756
 757 long wxMDIChildFrame::MSWWindowProc(WXUINT message,
 758                                     WXWPARAM wParam,
 759                                     WXLPARAM lParam)
 760 {
 761     long rc = 0;
 762     bool processed = FALSE;
 763
 764     switch ( message )
 765     {
 766         case WM_COMMAND:
 767             {
 768                 WORD id, cmd;
 769                 WXHWND hwnd;
 770                 UnpackCommand((WXWPARAM)wParam, (WXLPARAM)lParam,
 771                               &id, &hwnd, &cmd);
 772
 773                 processed = HandleCommand(id, cmd, (WXHWND)hwnd);
 774             }
 775             break;
 776
 777         case WM_GETMINMAXINFO:
 778             // let the default window proc calculate the size of MDI children
 779             // frames because it is based on the size of the MDI client window,
 780             // not on the values specified in wxWindow m_min/max variables
 781             return MSWDefWindowProc(message, wParam, lParam);
 782
 783         case WM_MDIACTIVATE:
 784             {
 785                 WXWORD act;
 786                 WXHWND hwndAct, hwndDeact;
 787                 UnpackMDIActivate(wParam, lParam, &act, &hwndAct, &hwndDeact);
 788
 789                 processed = HandleMDIActivate(act, hwndAct, hwndDeact);
 790             }
 791             // fall through
 792
 793         case WM_MOVE:
 794             // must pass WM_MOVE to DefMDIChildProc() to recalculate MDI client
 795             // scrollbars if necessary
 796
 797             // fall through
 798
 799         case WM_SIZE:
 800             // must pass WM_SIZE to DefMDIChildProc(), otherwise many weird
 801             // things happen
 802             MSWDefWindowProc(message, wParam, lParam);
 803             break;
 804
 805         case WM_SYSCOMMAND:
 806             // DefMDIChildProc handles SC_{NEXT/PREV}WINDOW here, so pass it
 807             // the message (the base class version does not)
 808             return MSWDefWindowProc(message, wParam, lParam);
 809
 810         case WM_WINDOWPOSCHANGING:
 811             processed = HandleWindowPosChanging((LPWINDOWPOS)lParam);
 812             break;
 813     }
 814
 815     if ( !processed )
 816         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 817
 818     return rc;
 819 }
 820
 821 bool wxMDIChildFrame::HandleSize(int x, int y, WXUINT id)
 822 {
 823     HWND hwnd = GetHwnd();
 824
 825     if ( !hwnd || hwnd == invalidHandle )
 826     {
 827         return FALSE;
 828     }
 829
 830     switch (id)
 831     {
 832         case SIZEFULLSCREEN:
 833         case SIZENORMAL:
 834             m_iconized = FALSE;
 835             break;
 836
 837         case SIZEICONIC:
 838             m_iconized = TRUE;
 839             break;
 840     }
 841
 842     if ( !m_iconized )
 843     {
 844         // forward WM_SIZE to status bar control
 845 #if wxUSE_NATIVE_STATUSBAR
 846         if (m_frameStatusBar && m_frameStatusBar->IsKindOf(CLASSINFO(wxStatusBar95)))
 847         {
 848             wxSizeEvent event(wxSize(x, y), m_frameStatusBar->GetId());
 849             event.SetEventObject( m_frameStatusBar );
 850
 851             ((wxStatusBar95 *)m_frameStatusBar)->OnSize(event);
 852         }
 853 #endif // wxUSE_NATIVE_STATUSBAR
 854
 855         PositionStatusBar();
 856         PositionToolBar();
 857
 858         return wxWindow::HandleSize(x, y, id);
 859     }
 860     else
 861     {
 862         return FALSE;
 863     }
 864 }
 865
 866 bool wxMDIChildFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 867 {
 868     // In case it's e.g. a toolbar.
 869     if ( hwnd )
 870     {
 871         wxWindow *win = wxFindWinFromHandle(hwnd);
 872         if (win)
 873             return win->MSWCommand(cmd, id);
 874     }
 875
 876     if (wxCurrentPopupMenu)
 877     {
 878         wxMenu *popupMenu = wxCurrentPopupMenu;
 879         wxCurrentPopupMenu = NULL;
 880         if (popupMenu->MSWCommand(cmd, id))
 881             return TRUE;
 882     }
 883
 884     if (GetMenuBar() && GetMenuBar()->FindItemForId(id))
 885     {
 886         ProcessCommand(id);
 887         return TRUE;
 888     }
 889     else
 890         return FALSE;
 891
 892     return TRUE;
 893 }
 894
 895 bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
 896                                         WXHWND hwndAct,
 897                                         WXHWND hwndDeact)
 898 {
 899     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 900
 901     HMENU menuToSet = 0;
 902
 903     bool activated;
 904
 905     if ( m_hWnd == hwndAct )
 906     {
 907         activated = TRUE;
 908         parent->m_currentChild = this;
 909
 910         HMENU child_menu = (HMENU)GetWinMenu();
 911         if ( child_menu )
 912         {
 913             parent->m_parentFrameActive = FALSE;
 914
 915             menuToSet = child_menu;
 916         }
 917     }
 918     else if ( m_hWnd == hwndDeact )
 919     {
 920         wxASSERT_MSG( parent->m_currentChild == this,
 921                       _T("can't deactivate MDI child which wasn't active!") );
 922
 923         activated = FALSE;
 924         parent->m_currentChild = NULL;
 925
 926         HMENU parent_menu = (HMENU)parent->GetWinMenu();
 927         if ( parent_menu )
 928         {
 929             parent->m_parentFrameActive = TRUE;
 930
 931             menuToSet = parent_menu;
 932         }
 933     }
 934     else
 935     {
 936         // we have nothing to with it
 937         return FALSE;
 938     }
 939
 940     if ( menuToSet )
 941     {
 942         HMENU subMenu = GetSubMenu((HMENU) parent->GetWindowMenu(), 0);
 943
 944         MDISetMenu(parent->GetClientWindow(), menuToSet, subMenu);
 945     }
 946
 947     wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
 948     event.SetEventObject( this );
 949
 950     return GetEventHandler()->ProcessEvent(event);
 951 }
 952
 953 bool wxMDIChildFrame::HandleWindowPosChanging(void *pos)
 954 {
 955     WINDOWPOS *lpPos = (WINDOWPOS *)pos;
 956 #if defined(__WIN95__)
 957     if (!(lpPos->flags & SWP_NOSIZE))
 958     {
 959         RECT rectClient;
 960         DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
 961         DWORD dwStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 962         if (ResetWindowStyle((void *) & rectClient) && (dwStyle & WS_MAXIMIZE))
 963         {
 964             ::AdjustWindowRectEx(&rectClient, dwStyle, FALSE, dwExStyle);
 965             lpPos->x = rectClient.left;
 966             lpPos->y = rectClient.top;
 967             lpPos->cx = rectClient.right - rectClient.left;
 968             lpPos->cy = rectClient.bottom - rectClient.top;
 969         }
 970         wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
 971         if (pFrameWnd && pFrameWnd->GetToolBar())
 972         {
 973             pFrameWnd->GetToolBar()->Refresh();
 974         }
 975     }
 976 #endif // Win95
 977
 978     return FALSE;
 979 }
 980
 981 // ---------------------------------------------------------------------------
 982 // MDI specific message translation/preprocessing
 983 // ---------------------------------------------------------------------------
 984
 985 long wxMDIChildFrame::MSWDefWindowProc(WXUINT message, WXUINT wParam, WXLPARAM lParam)
 986 {
 987     return DefMDIChildProc(GetHwnd(),
 988                            (UINT)message, (WPARAM)wParam, (LPARAM)lParam);
 989 }
 990
 991 bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
 992 {
 993     return m_acceleratorTable.Translate(GetParent(), msg);
 994 }
 995
 996 // ---------------------------------------------------------------------------
 997 // misc
 998 // ---------------------------------------------------------------------------
 999
1000 void wxMDIChildFrame::MSWDestroyWindow()
1001 {
1002     MSWDetachWindowMenu();
1003     invalidHandle = GetHwnd();
1004
1005     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
1006
1007     // Must make sure this handle is invalidated (set to NULL) since all sorts
1008     // of things could happen after the child client is destroyed, but before
1009     // the wxFrame is destroyed.
1010
1011     HWND oldHandle = (HWND)GetHWND();
1012     SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIDESTROY,
1013                 (WPARAM)oldHandle, 0);
1014     invalidHandle = 0;
1015
1016     if (m_hMenu)
1017     {
1018         ::DestroyMenu((HMENU) m_hMenu);
1019         m_hMenu = 0;
1020     }
1021     m_hWnd = 0;
1022 }
1023
1024 // Change the client window's extended style so we don't get a client edge
1025 // style when a child is maximised (a double border looks silly.)
1026 bool wxMDIChildFrame::ResetWindowStyle(void *vrect)
1027 {
1028 #if defined(__WIN95__)
1029     RECT *rect = (RECT *)vrect;
1030     wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
1031     wxMDIChildFrame* pChild = pFrameWnd->GetActiveChild();
1032     if (!pChild || (pChild == this))
1033     {
1034         DWORD dwStyle = ::GetWindowLong(GetWinHwnd(pFrameWnd->GetClientWindow()), GWL_EXSTYLE);
1035         DWORD dwThisStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1036         DWORD dwNewStyle = dwStyle;
1037         if (pChild != NULL && (dwThisStyle & WS_MAXIMIZE))
1038             dwNewStyle &= ~(WS_EX_CLIENTEDGE);
1039         else
1040             dwNewStyle |= WS_EX_CLIENTEDGE;
1041
1042         if (dwStyle != dwNewStyle)
1043         {
1044             HWND hwnd = GetWinHwnd(pFrameWnd->GetClientWindow());
1045             ::RedrawWindow(hwnd, NULL, NULL, RDW_INVALIDATE | RDW_ALLCHILDREN);
1046             ::SetWindowLong(hwnd, GWL_EXSTYLE, dwNewStyle);
1047             ::SetWindowPos(hwnd, NULL, 0, 0, 0, 0,
1048                            SWP_FRAMECHANGED | SWP_NOACTIVATE |
1049                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
1050                            SWP_NOCOPYBITS);
1051             if (rect)
1052                 ::GetClientRect(hwnd, rect);
1053
1054             return TRUE;
1055         }
1056     }
1057 #endif // Win95
1058
1059     return FALSE;
1060 }
1061
1062 // ===========================================================================
1063 // wxMDIClientWindow: the window of predefined (by Windows) class which
1064 // contains the child frames
1065 // ===========================================================================
1066
1067 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
1068 {
1069     m_backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE);
1070
1071     CLIENTCREATESTRUCT ccs;
1072     m_windowStyle = style;
1073     m_parent = parent;
1074
1075     ccs.hWindowMenu = (HMENU)parent->GetWindowMenu();
1076     ccs.idFirstChild = wxFIRST_MDI_CHILD;
1077
1078     DWORD msStyle = WS_VISIBLE | WS_CHILD | WS_CLIPCHILDREN;
1079     if ( style & wxHSCROLL )
1080         msStyle |= WS_HSCROLL;
1081     if ( style & wxVSCROLL )
1082         msStyle |= WS_VSCROLL;
1083
1084 #if defined(__WIN95__)
1085     DWORD exStyle = WS_EX_CLIENTEDGE;
1086 #else
1087     DWORD exStyle = 0;
1088 #endif
1089
1090     wxWndHook = this;
1091     m_hWnd = (WXHWND)::CreateWindowEx
1092                        (
1093                         exStyle,
1094                         _T("MDICLIENT"),
1095                         NULL,
1096                         msStyle,
1097                         0, 0, 0, 0,
1098                         GetWinHwnd(parent),
1099                         NULL,
1100                         wxGetInstance(),
1101                         (LPSTR)(LPCLIENTCREATESTRUCT)&ccs);
1102     if ( !m_hWnd )
1103     {
1104         wxLogLastError("CreateWindowEx(MDI client)");
1105
1106         return FALSE;
1107     }
1108
1109     SubclassWin(m_hWnd);
1110     wxWndHook = NULL;
1111
1112     return TRUE;
1113 }
1114
1115 // Explicitly call default scroll behaviour
1116 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
1117 {
1118     // Note: for client windows, the scroll position is not set in
1119     // WM_HSCROLL, WM_VSCROLL, so we can't easily determine what
1120     // scroll position we're at.
1121     // This makes it hard to paint patterns or bitmaps in the background,
1122     // and have the client area scrollable as well.
1123
1124     if ( event.GetOrientation() == wxHORIZONTAL )
1125         m_scrollX = event.GetPosition(); // Always returns zero!
1126     else
1127         m_scrollY = event.GetPosition(); // Always returns zero!
1128
1129     event.Skip();
1130 }
1131
1132 // ---------------------------------------------------------------------------
1133 // non member functions
1134 // ---------------------------------------------------------------------------
1135
1136 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow)
1137 {
1138     ::SendMessage(GetWinHwnd(win), WM_MDISETMENU,
1139 #ifdef __WIN32__
1140                   (WPARAM)hmenuFrame, (LPARAM)hmenuWindow);
1141 #else
1142                   0, MAKELPARAM(hmenuFrame, hmenuWindow));
1143 #endif
1144
1145     // update menu bar of the parent window
1146     wxWindow *parent = win->GetParent();
1147     wxCHECK_RET( parent, _T("MDI client without parent frame? weird...") );
1148
1149     ::DrawMenuBar(GetWinHwnd(parent));
1150 }
1151
1152 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu)
1153 {
1154     // Try to insert Window menu in front of Help, otherwise append it.
1155     HMENU hmenu = (HMENU)menu;
1156     int N = GetMenuItemCount(hmenu);
1157     bool success = FALSE;
1158     for ( int i = 0; i < N; i++ )
1159     {
1160         wxChar buf[256];
1161         int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1162         if ( chars == 0 )
1163         {
1164             wxLogLastError(_T("GetMenuString"));
1165
1166             continue;
1167         }
1168
1169         if ( wxStripMenuCodes(wxString(buf)).IsSameAs(_T("Help")) )
1170         {
1171             success = TRUE;
1172             ::InsertMenu(hmenu, i, MF_BYPOSITION | MF_POPUP | MF_STRING,
1173                          (UINT)subMenu, _T("&Window"));
1174             break;
1175         }
1176     }
1177
1178     if ( !success )
1179     {
1180         ::AppendMenu(hmenu, MF_POPUP, (UINT)subMenu, _T("&Window"));
1181     }
1182
1183     MDISetMenu(win, hmenu, subMenu);
1184 }
1185
1186 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
1187                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact)
1188 {
1189 #ifdef __WIN32__
1190     *activate = TRUE;
1191     *hwndAct = (WXHWND)lParam;
1192     *hwndDeact = (WXHWND)wParam;
1193 #else // Win16
1194     *activate = (WXWORD)wParam;
1195     *hwndAct = (WXHWND)LOWORD(lParam);
1196     *hwndDeact = (WXHWND)HIWORD(lParam);
1197 #endif // Win32/Win16
1198 }