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 char wxMDIFrameClassName[];
  61 extern char 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(), "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             break;
 342
 343         case WM_CREATE:
 344             m_clientWindow = OnCreateClient();
 345             // Uses own style for client style
 346             if ( !m_clientWindow->CreateClient(this, GetWindowStyleFlag()) )
 347             {
 348                 wxLogMessage(_("Failed to create MDI parent frame."));
 349
 350                 rc = -1;
 351             }
 352
 353             processed = TRUE;
 354             break;
 355
 356         case WM_ERASEBKGND:
 357             processed = TRUE;
 358
 359             // we erase background ourselves
 360             rc = TRUE;
 361             break;
 362
 363         case WM_MENUSELECT:
 364             {
 365                 WXWORD item, flags;
 366                 WXHMENU hmenu;
 367                 UnpackMenuSelect(wParam, lParam, &item, &flags, &hmenu);
 368
 369                 if ( m_parentFrameActive )
 370                 {
 371                     processed = HandleMenuSelect(item, flags, hmenu);
 372                 }
 373                 else if (m_currentChild)
 374                 {
 375                     processed = m_currentChild->
 376                         HandleMenuSelect(item, flags, hmenu);
 377                 }
 378             }
 379             break;
 380     }
 381
 382     if ( !processed )
 383         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 384
 385     return rc;
 386 }
 387
 388 bool wxMDIParentFrame::HandleActivate(int state, bool minimized, WXHWND activate)
 389 {
 390     bool processed = FALSE;
 391
 392     if ( wxWindow::HandleActivate(state, minimized, activate) )
 393     {
 394         // already processed
 395         processed = TRUE;
 396     }
 397
 398     // If this window is an MDI parent, we must also send an OnActivate message
 399     // to the current child.
 400     if ( (m_currentChild != NULL) &&
 401          ((state == WA_ACTIVE) || (state == WA_CLICKACTIVE)) )
 402     {
 403         wxActivateEvent event(wxEVT_ACTIVATE, TRUE, m_currentChild->GetId());
 404         event.SetEventObject( m_currentChild );
 405         if ( m_currentChild->GetEventHandler()->ProcessEvent(event) )
 406             processed = TRUE;
 407     }
 408
 409     return processed;
 410 }
 411
 412 bool wxMDIParentFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 413 {
 414     // In case it's e.g. a toolbar.
 415     if ( hwnd )
 416     {
 417         wxWindow *win = wxFindWinFromHandle(hwnd);
 418         if ( win )
 419             return win->MSWCommand(cmd, id);
 420     }
 421
 422     // is it one of standard MDI commands?
 423     WXWPARAM wParam = 0;
 424     int msg;
 425     switch ( id )
 426     {
 427         case IDM_WINDOWCASCADE:
 428             msg = WM_MDICASCADE;
 429             wParam = MDITILE_SKIPDISABLED;
 430             break;
 431
 432         case IDM_WINDOWTILEHOR:
 433             wParam |= MDITILE_HORIZONTAL;
 434             // fall through
 435
 436         case IDM_WINDOWTILEVERT:
 437             if ( !wParam )
 438                 wParam = MDITILE_VERTICAL;
 439             msg = WM_MDITILE;
 440             wParam |= MDITILE_SKIPDISABLED;
 441             break;
 442
 443         case IDM_WINDOWICONS:
 444             msg = WM_MDIICONARRANGE;
 445             break;
 446
 447         case IDM_WINDOWNEXT:
 448             msg = WM_MDINEXT;
 449             break;
 450
 451         default:
 452             msg = 0;
 453     }
 454
 455     if ( msg )
 456     {
 457         ::SendMessage(GetWinHwnd(GetClientWindow()), msg, wParam, 0);
 458
 459         return TRUE;
 460     }
 461
 462     // FIXME VZ: what does this test do??
 463     if (id >= 0xF000)
 464     {
 465         return FALSE; // Get WndProc to call default proc
 466     }
 467
 468     if ( IsMdiCommandId(id) )
 469     {
 470         wxWindowList::Node* node = GetChildren().GetFirst();
 471         while ( node )
 472         {
 473             wxWindow* child = node->GetData();
 474             if ( child->GetHWND() )
 475             {
 476                 long childId = wxGetWindowId(child->GetHWND());
 477                 if (childId == id)
 478                 {
 479                     ::SendMessage( GetWinHwnd(GetClientWindow()),
 480                                    WM_MDIACTIVATE,
 481                                    (WPARAM)child->GetHWND(), 0);
 482                     return TRUE;
 483                 }
 484             }
 485             node = node->GetNext();
 486         }
 487     }
 488     else if ( m_parentFrameActive )
 489     {
 490         return ProcessCommand(id);
 491     }
 492     else if ( m_currentChild )
 493     {
 494         return m_currentChild->HandleCommand(id, cmd, hwnd);
 495     }
 496     else
 497     {
 498         // this shouldn't happen because it means that our messages are being
 499         // lost (they're not sent to the parent frame nor to the children)
 500         wxFAIL_MSG(_T("MDI parent frame is not active, "
 501                       "yet there is no active MDI child?"));
 502     }
 503
 504     return FALSE;
 505 }
 506
 507 long wxMDIParentFrame::MSWDefWindowProc(WXUINT message,
 508                                         WXWPARAM wParam,
 509                                         WXLPARAM lParam)
 510 {
 511     WXHWND clientWnd;
 512     if ( GetClientWindow() )
 513         clientWnd = GetClientWindow()->GetHWND();
 514     else
 515         clientWnd = 0;
 516
 517     return DefFrameProc(GetHwnd(), (HWND)clientWnd, message, wParam, lParam);
 518 }
 519
 520 bool wxMDIParentFrame::MSWTranslateMessage(WXMSG* msg)
 521 {
 522     MSG *pMsg = (MSG *)msg;
 523
 524     if ( m_currentChild && m_currentChild->GetHWND() &&
 525          m_currentChild->MSWTranslateMessage(msg) )
 526     {
 527         return TRUE;
 528     }
 529
 530     if ( m_acceleratorTable.Ok() &&
 531          ::TranslateAccelerator(GetHwnd(),
 532                                 GetTableHaccel(m_acceleratorTable),
 533                                 pMsg) )
 534     {
 535         return TRUE;
 536     }
 537
 538     if ( pMsg->message == WM_KEYDOWN || pMsg->message == WM_SYSKEYDOWN )
 539     {
 540         if ( ::TranslateMDISysAccel(GetWinHwnd(GetClientWindow()), pMsg))
 541             return TRUE;
 542     }
 543
 544     return FALSE;
 545 }
 546
 547 // ===========================================================================
 548 // wxMDIChildFrame
 549 // ===========================================================================
 550
 551 wxMDIChildFrame::wxMDIChildFrame()
 552 {
 553 }
 554
 555 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 556                              wxWindowID id,
 557                              const wxString& title,
 558                              const wxPoint& pos,
 559                              const wxSize& size,
 560                              long style,
 561                              const wxString& name)
 562 {
 563   m_defaultIcon = (WXHICON)(wxSTD_MDICHILDFRAME_ICON ? wxSTD_MDICHILDFRAME_ICON
 564                                                      : wxDEFAULT_MDICHILDFRAME_ICON);
 565
 566   SetName(name);
 567
 568   if ( id > -1 )
 569     m_windowId = id;
 570   else
 571     m_windowId = (int)NewControlId();
 572
 573   if ( parent )
 574   {
 575       parent->AddChild(this);
 576   }
 577
 578   wxWndHook = this;
 579
 580   int x = pos.x;
 581   int y = pos.y;
 582   int width = size.x;
 583   int height = size.y;
 584
 585   MDICREATESTRUCT mcs;
 586
 587   mcs.szClass = wxMDIChildFrameClassName;
 588   mcs.szTitle = title;
 589   mcs.hOwner = wxGetInstance();
 590   if (x > -1)
 591       mcs.x = x;
 592   else
 593       mcs.x = CW_USEDEFAULT;
 594
 595   if (y > -1)
 596       mcs.y = y;
 597   else
 598       mcs.y = CW_USEDEFAULT;
 599
 600   if (width > -1)
 601       mcs.cx = width;
 602   else
 603       mcs.cx = CW_USEDEFAULT;
 604
 605   if (height > -1)
 606       mcs.cy = height;
 607   else
 608       mcs.cy = CW_USEDEFAULT;
 609
 610   DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN;
 611   if (style & wxMINIMIZE_BOX)
 612     msflags |= WS_MINIMIZEBOX;
 613   if (style & wxMAXIMIZE_BOX)
 614     msflags |= WS_MAXIMIZEBOX;
 615   if (style & wxTHICK_FRAME)
 616     msflags |= WS_THICKFRAME;
 617   if (style & wxSYSTEM_MENU)
 618     msflags |= WS_SYSMENU;
 619   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 620     msflags |= WS_MINIMIZE;
 621   if (style & wxMAXIMIZE)
 622     msflags |= WS_MAXIMIZE;
 623   if (style & wxCAPTION)
 624     msflags |= WS_CAPTION;
 625
 626   mcs.style = msflags;
 627
 628   mcs.lParam = 0;
 629
 630   DWORD Return = SendMessage((HWND) parent->GetClientWindow()->GetHWND(),
 631         WM_MDICREATE, 0, (LONG)(LPSTR)&mcs);
 632
 633   //handle = (HWND)LOWORD(Return);
 634   // Must be the DWORRD for WIN32. And in 16 bits, HIWORD=0 (says Microsoft)
 635   m_hWnd = (WXHWND)Return;
 636
 637   // This gets reassigned so can't be stored
 638 //  m_windowId = GetWindowLong((HWND) m_hWnd, GWL_ID);
 639
 640   wxWndHook = NULL;
 641   wxWinHandleList->Append((long)GetHWND(), this);
 642
 643   SetWindowLong((HWND) GetHWND(), 0, (long)this);
 644
 645   wxModelessWindows.Append(this);
 646   return TRUE;
 647 }
 648
 649 wxMDIChildFrame::~wxMDIChildFrame()
 650 {
 651     MSWDestroyWindow();
 652 }
 653
 654 // Set the client size (i.e. leave the calculation of borders etc.
 655 // to wxWindows)
 656 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 657 {
 658   HWND hWnd = (HWND) GetHWND();
 659
 660   RECT rect;
 661   ::GetClientRect(hWnd, &rect);
 662
 663   RECT rect2;
 664   GetWindowRect(hWnd, &rect2);
 665
 666   // Find the difference between the entire window (title bar and all)
 667   // and the client area; add this to the new client size to move the
 668   // window
 669   int actual_width = rect2.right - rect2.left - rect.right + width;
 670   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 671
 672   if (GetStatusBar())
 673   {
 674     int sx, sy;
 675     GetStatusBar()->GetSize(&sx, &sy);
 676     actual_height += sy;
 677   }
 678
 679   POINT point;
 680   point.x = rect2.left;
 681   point.y = rect2.top;
 682
 683   // If there's an MDI parent, must subtract the parent's top left corner
 684   // since MoveWindow moves relative to the parent
 685   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 686   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 687
 688   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)TRUE);
 689
 690   wxSizeEvent event(wxSize(width, height), m_windowId);
 691   event.SetEventObject( this );
 692   GetEventHandler()->ProcessEvent(event);
 693 }
 694
 695 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 696 {
 697   RECT rect;
 698   GetWindowRect((HWND) GetHWND(), &rect);
 699   POINT point;
 700   point.x = rect.left;
 701   point.y = rect.top;
 702
 703   // Since we now have the absolute screen coords,
 704   // if there's a parent we must subtract its top left corner
 705   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 706   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 707
 708   *x = point.x;
 709   *y = point.y;
 710 }
 711
 712 void wxMDIChildFrame::InternalSetMenuBar()
 713 {
 714     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 715
 716     HMENU subMenu = GetSubMenu((HMENU)parent->GetWindowMenu(), 0);
 717
 718     InsertWindowMenu(parent->GetClientWindow(), m_hMenu, subMenu);
 719
 720     parent->m_parentFrameActive = FALSE;
 721 }
 722
 723 // ---------------------------------------------------------------------------
 724 // MDI operations
 725 // ---------------------------------------------------------------------------
 726
 727 void wxMDIChildFrame::Maximize()
 728 {
 729     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 730     if ( parent && parent->GetClientWindow() )
 731         ::SendMessage( (HWND) parent->GetClientWindow()->GetHWND(), WM_MDIMAXIMIZE, (WPARAM) (HWND) GetHWND(), 0);
 732 }
 733
 734 void wxMDIChildFrame::Restore()
 735 {
 736     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 737     if ( parent && parent->GetClientWindow() )
 738         ::SendMessage( (HWND) parent->GetClientWindow()->GetHWND(), WM_MDIRESTORE, (WPARAM) (HWND) GetHWND(), 0);
 739 }
 740
 741 void wxMDIChildFrame::Activate()
 742 {
 743     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 744     if ( parent && parent->GetClientWindow() )
 745         ::SendMessage( (HWND) parent->GetClientWindow()->GetHWND(), WM_MDIACTIVATE, (WPARAM) (HWND) GetHWND(), 0);
 746 }
 747
 748 // ---------------------------------------------------------------------------
 749 // MDI window proc and message handlers
 750 // ---------------------------------------------------------------------------
 751
 752 long wxMDIChildFrame::MSWWindowProc(WXUINT message,
 753                                     WXWPARAM wParam,
 754                                     WXLPARAM lParam)
 755 {
 756     long rc = 0;
 757     bool processed = FALSE;
 758
 759     switch ( message )
 760     {
 761         case WM_COMMAND:
 762             {
 763                 WORD id, cmd;
 764                 WXHWND hwnd;
 765                 UnpackCommand((WXWPARAM)wParam, (WXLPARAM)lParam,
 766                               &id, &hwnd, &cmd);
 767
 768                 processed = HandleCommand(id, cmd, (WXHWND)hwnd);
 769             }
 770             break;
 771
 772         case WM_SIZE:
 773             processed = HandleSize(LOWORD(lParam), HIWORD(lParam), wParam);
 774             break;
 775
 776         case WM_GETMINMAXINFO:
 777             // let the default window proc calculate the size of MDI children
 778             // frames because it is based on the size of the MDI client window,
 779             // not on the values specified in wxWindow m_min/max variables
 780             return MSWDefWindowProc(message, wParam, lParam);
 781
 782         case WM_MDIACTIVATE:
 783             {
 784                 WXWORD act;
 785                 WXHWND hwndAct, hwndDeact;
 786                 UnpackMDIActivate(wParam, lParam, &act, &hwndAct, &hwndDeact);
 787
 788                 processed = HandleMDIActivate(act, hwndAct, hwndDeact);
 789             }
 790             break;
 791
 792         case WM_WINDOWPOSCHANGING:
 793             processed = HandleWindowPosChanging((LPWINDOWPOS)lParam);
 794             break;
 795     }
 796
 797     if ( !processed )
 798         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 799
 800     return rc;
 801 }
 802
 803 bool wxMDIChildFrame::HandleSize(int x, int y, WXUINT id)
 804 {
 805     HWND hwnd = GetHwnd();
 806
 807     if ( !hwnd || hwnd == invalidHandle )
 808     {
 809         return FALSE;
 810     }
 811
 812     switch (id)
 813     {
 814         case SIZEFULLSCREEN:
 815         case SIZENORMAL:
 816             m_iconized = FALSE;
 817             break;
 818
 819         case SIZEICONIC:
 820             m_iconized = TRUE;
 821             break;
 822     }
 823
 824     if ( !m_iconized )
 825     {
 826         // forward WM_SIZE to status bar control
 827 #if wxUSE_NATIVE_STATUSBAR
 828         if (m_frameStatusBar && m_frameStatusBar->IsKindOf(CLASSINFO(wxStatusBar95)))
 829         {
 830             wxSizeEvent event(wxSize(x, y), m_frameStatusBar->GetId());
 831             event.SetEventObject( m_frameStatusBar );
 832
 833             ((wxStatusBar95 *)m_frameStatusBar)->OnSize(event);
 834         }
 835 #endif // wxUSE_NATIVE_STATUSBAR
 836
 837         PositionStatusBar();
 838         PositionToolBar();
 839
 840         return wxWindow::HandleSize(x, y, id);
 841     }
 842     else
 843     {
 844         return FALSE;
 845     }
 846 }
 847
 848 bool wxMDIChildFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 849 {
 850     // In case it's e.g. a toolbar.
 851     if ( hwnd )
 852     {
 853         wxWindow *win = wxFindWinFromHandle(hwnd);
 854         if (win)
 855             return win->MSWCommand(cmd, id);
 856     }
 857
 858     if (wxCurrentPopupMenu)
 859     {
 860         wxMenu *popupMenu = wxCurrentPopupMenu;
 861         wxCurrentPopupMenu = NULL;
 862         if (popupMenu->MSWCommand(cmd, id))
 863             return TRUE;
 864     }
 865
 866     if (GetMenuBar() && GetMenuBar()->FindItemForId(id))
 867     {
 868         ProcessCommand(id);
 869         return TRUE;
 870     }
 871     else
 872         return FALSE;
 873
 874     return TRUE;
 875 }
 876
 877 bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
 878                                         WXHWND hwndAct,
 879                                         WXHWND hwndDeact)
 880 {
 881     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 882
 883     HMENU menuToSet = 0;
 884
 885     bool activated;
 886
 887     if ( m_hWnd == hwndAct )
 888     {
 889         activated = TRUE;
 890         parent->m_currentChild = this;
 891
 892         HMENU child_menu = (HMENU)GetWinMenu();
 893         if ( child_menu )
 894         {
 895             parent->m_parentFrameActive = FALSE;
 896
 897             menuToSet = child_menu;
 898         }
 899     }
 900     else if ( m_hWnd == hwndDeact )
 901     {
 902         wxASSERT_MSG( parent->m_currentChild == this,
 903                       _T("can't deactivate MDI child which wasn't active!") );
 904
 905         activated = FALSE;
 906         parent->m_currentChild = NULL;
 907
 908         HMENU parent_menu = (HMENU)parent->GetWinMenu();
 909         if ( parent_menu )
 910         {
 911             parent->m_parentFrameActive = TRUE;
 912
 913             menuToSet = parent_menu;
 914         }
 915     }
 916     else
 917     {
 918         // we have nothing to with it
 919         return FALSE;
 920     }
 921
 922     if ( menuToSet )
 923     {
 924         HMENU subMenu = GetSubMenu((HMENU) parent->GetWindowMenu(), 0);
 925
 926         MDISetMenu(parent->GetClientWindow(), menuToSet, subMenu);
 927     }
 928
 929     wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
 930     event.SetEventObject( this );
 931
 932     return GetEventHandler()->ProcessEvent(event);
 933 }
 934
 935 bool wxMDIChildFrame::HandleWindowPosChanging(void *pos)
 936 {
 937     WINDOWPOS *lpPos = (WINDOWPOS *)pos;
 938 #if defined(__WIN95__)
 939     if (!(lpPos->flags & SWP_NOSIZE))
 940     {
 941         RECT rectClient;
 942         DWORD dwExStyle = ::GetWindowLong((HWND) GetHWND(), GWL_EXSTYLE);
 943         DWORD dwStyle = ::GetWindowLong((HWND) GetHWND(), GWL_STYLE);
 944         if (ResetWindowStyle((void *) & rectClient) && (dwStyle & WS_MAXIMIZE))
 945         {
 946             ::AdjustWindowRectEx(&rectClient, dwStyle, FALSE, dwExStyle);
 947             lpPos->x = rectClient.left;
 948             lpPos->y = rectClient.top;
 949             lpPos->cx = rectClient.right - rectClient.left;
 950             lpPos->cy = rectClient.bottom - rectClient.top;
 951         }
 952         wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
 953         if (pFrameWnd && pFrameWnd->GetToolBar())
 954         {
 955             pFrameWnd->GetToolBar()->Refresh();
 956         }
 957     }
 958 #endif // Win95
 959
 960     return FALSE;
 961 }
 962
 963 // ---------------------------------------------------------------------------
 964 // MDI specific message translation/preprocessing
 965 // ---------------------------------------------------------------------------
 966
 967 long wxMDIChildFrame::MSWDefWindowProc(WXUINT message, WXUINT wParam, WXLPARAM lParam)
 968 {
 969     return DefMDIChildProc(GetHwnd(),
 970                            (UINT)message, (WPARAM)wParam, (LPARAM)lParam);
 971 }
 972
 973 bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
 974 {
 975     MSG *pMsg = (MSG *)msg;
 976     if ( m_acceleratorTable.Ok() )
 977     {
 978         return ::TranslateAccelerator(GetWinHwnd(GetParent()),
 979                                       GetTableHaccel(m_acceleratorTable),
 980                                       pMsg) != 0;
 981     }
 982
 983     return FALSE;
 984 }
 985
 986 // ---------------------------------------------------------------------------
 987 // misc
 988 // ---------------------------------------------------------------------------
 989
 990 void wxMDIChildFrame::MSWDestroyWindow()
 991 {
 992     MSWDetachWindowMenu();
 993     invalidHandle = (HWND) GetHWND();
 994
 995     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 996
 997     // Must make sure this handle is invalidated (set to NULL) since all sorts
 998     // of things could happen after the child client is destroyed, but before
 999     // the wxFrame is destroyed.
1000
1001     HWND oldHandle = (HWND)GetHWND();
1002 #ifdef __WIN32__
1003     SendMessage((HWND) parent->GetClientWindow()->GetHWND(), WM_MDIDESTROY, (WPARAM)oldHandle, (LPARAM)0);
1004 #else
1005     SendMessage((HWND) parent->GetClientWindow()->GetHWND(), WM_MDIDESTROY, (HWND)oldHandle, 0);
1006 #endif
1007     invalidHandle = 0;
1008
1009     if (m_hMenu)
1010     {
1011         ::DestroyMenu((HMENU) m_hMenu);
1012         m_hMenu = 0;
1013     }
1014     m_hWnd = 0;
1015 }
1016
1017 // Change the client window's extended style so we don't get a client edge
1018 // style when a child is maximised (a double border looks silly.)
1019 bool wxMDIChildFrame::ResetWindowStyle(void *vrect)
1020 {
1021 #if defined(__WIN95__)
1022     RECT *rect = (RECT *)vrect;
1023     wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
1024     wxMDIChildFrame* pChild = pFrameWnd->GetActiveChild();
1025     if (!pChild || (pChild == this))
1026     {
1027         DWORD dwStyle = ::GetWindowLong((HWND) pFrameWnd->GetClientWindow()->GetHWND(), GWL_EXSTYLE);
1028         DWORD dwThisStyle = ::GetWindowLong((HWND) GetHWND(), GWL_STYLE);
1029         DWORD dwNewStyle = dwStyle;
1030         if (pChild != NULL && (dwThisStyle & WS_MAXIMIZE))
1031             dwNewStyle &= ~(WS_EX_CLIENTEDGE);
1032         else
1033             dwNewStyle |= WS_EX_CLIENTEDGE;
1034
1035         if (dwStyle != dwNewStyle)
1036         {
1037             HWND hwnd = GetWinHwnd(pFrameWnd->GetClientWindow());
1038             ::RedrawWindow(hwnd, NULL, NULL, RDW_INVALIDATE | RDW_ALLCHILDREN);
1039             ::SetWindowLong(hwnd, GWL_EXSTYLE, dwNewStyle);
1040             ::SetWindowPos(hwnd, NULL, 0, 0, 0, 0,
1041                            SWP_FRAMECHANGED | SWP_NOACTIVATE |
1042                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
1043                            SWP_NOCOPYBITS);
1044             if (rect)
1045                 ::GetClientRect(hwnd, rect);
1046
1047             return TRUE;
1048         }
1049     }
1050 #endif // Win95
1051
1052     return FALSE;
1053 }
1054
1055 // ===========================================================================
1056 // wxMDIClientWindow: the window of predefined (by Windows) class which
1057 // contains the child frames
1058 // ===========================================================================
1059
1060 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
1061 {
1062     m_backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE);
1063
1064     CLIENTCREATESTRUCT ccs;
1065     m_windowStyle = style;
1066     m_parent = parent;
1067
1068     ccs.hWindowMenu = (HMENU)parent->GetWindowMenu();
1069     ccs.idFirstChild = wxFIRST_MDI_CHILD;
1070
1071     DWORD msStyle = WS_VISIBLE | WS_CHILD | WS_CLIPCHILDREN;
1072     if ( style & wxHSCROLL )
1073         msStyle |= WS_HSCROLL;
1074     if ( style & wxVSCROLL )
1075         msStyle |= WS_VSCROLL;
1076
1077 #if defined(__WIN95__)
1078     DWORD exStyle = WS_EX_CLIENTEDGE;
1079 #else
1080     DWORD exStyle = 0;
1081 #endif
1082
1083     wxWndHook = this;
1084     m_hWnd = (WXHWND)::CreateWindowEx
1085                        (
1086                         exStyle,
1087                         "MDICLIENT",
1088                         NULL,
1089                         msStyle,
1090                         0, 0, 0, 0,
1091                         GetWinHwnd(parent),
1092                         NULL,
1093                         wxGetInstance(),
1094                         (LPSTR)(LPCLIENTCREATESTRUCT)&ccs);
1095     if ( !m_hWnd )
1096     {
1097         wxLogLastError("CreateWindowEx(MDI client)");
1098
1099         return FALSE;
1100     }
1101
1102     SubclassWin(m_hWnd);
1103     wxWndHook = NULL;
1104
1105     return TRUE;
1106 }
1107
1108 // Explicitly call default scroll behaviour
1109 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
1110 {
1111     // Note: for client windows, the scroll position is not set in
1112     // WM_HSCROLL, WM_VSCROLL, so we can't easily determine what
1113     // scroll position we're at.
1114     // This makes it hard to paint patterns or bitmaps in the background,
1115     // and have the client area scrollable as well.
1116
1117     if ( event.GetOrientation() == wxHORIZONTAL )
1118         m_scrollX = event.GetPosition(); // Always returns zero!
1119     else
1120         m_scrollY = event.GetPosition(); // Always returns zero!
1121
1122     event.Skip();
1123 }
1124
1125 // ---------------------------------------------------------------------------
1126 // non member functions
1127 // ---------------------------------------------------------------------------
1128
1129 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow)
1130 {
1131     ::SendMessage(GetWinHwnd(win), WM_MDISETMENU,
1132 #ifdef __WIN32__
1133                   (WPARAM)hmenuFrame, (LPARAM)hmenuWindow);
1134 #else
1135                   0, MAKELPARAM(hmenuFrame, hmenuWindow));
1136 #endif
1137
1138     // update menu bar of the parent window
1139     wxWindow *parent = win->GetParent();
1140     wxCHECK_RET( parent, "MDI client without parent frame? weird..." );
1141
1142     ::DrawMenuBar(GetWinHwnd(parent));
1143 }
1144
1145 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu)
1146 {
1147     // Try to insert Window menu in front of Help, otherwise append it.
1148     HMENU hmenu = (HMENU)menu;
1149     int N = GetMenuItemCount(hmenu);
1150     bool success = FALSE;
1151     for ( int i = 0; i < N; i++ )
1152     {
1153         char buf[256];
1154         int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1155         if ( chars == 0 )
1156         {
1157             wxLogLastError("GetMenuString");
1158
1159             continue;
1160         }
1161
1162         if ( wxStripMenuCodes(wxString(buf)).IsSameAs(_("Help")) )
1163         {
1164             success = TRUE;
1165             ::InsertMenu(hmenu, i, MF_BYPOSITION | MF_POPUP | MF_STRING,
1166                          (UINT)subMenu, "&Window");
1167             break;
1168         }
1169     }
1170
1171     if ( !success )
1172     {
1173         ::AppendMenu(hmenu, MF_POPUP, (UINT)subMenu, _("&Window"));
1174     }
1175
1176     MDISetMenu(win, hmenu, subMenu);
1177 }
1178
1179 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
1180                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact)
1181 {
1182 #ifdef __WIN32__
1183     *activate = TRUE;
1184     *hwndAct = (WXHWND)lParam;
1185     *hwndDeact = (WXHWND)wParam;
1186 #else // Win16
1187     *activate = (WXWORD)wParam;
1188     *hwndAct = (WXHWND)LOWORD(lParam);
1189     *hwndDeact = (WXHWND)HIWORD(lParam);
1190 #endif // Win32/Win16
1191 }