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