src/msw/mdi.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        mdi.cpp
   3 // Purpose:     MDI classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "mdi.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/setup.h"
  33     #include "wx/frame.h"
  34     #include "wx/menu.h"
  35     #include "wx/app.h"
  36     #include "wx/utils.h"
  37     #include "wx/dialog.h"
  38     #if wxUSE_STATUSBAR
  39         #include "wx/statusbr.h"
  40     #endif
  41     #include "wx/settings.h"
  42     #include "wx/intl.h"
  43     #include "wx/log.h"
  44 #endif
  45
  46 #include "wx/mdi.h"
  47 #include "wx/msw/private.h"
  48
  49 #if wxUSE_STATUSBAR && wxUSE_NATIVE_STATUSBAR
  50     #include "wx/msw/statbr95.h"
  51 #endif
  52
  53 #if wxUSE_TOOLBAR
  54     #include "wx/toolbar.h"
  55 #endif // wxUSE_TOOLBAR
  56
  57 #include <string.h>
  58
  59 // ---------------------------------------------------------------------------
  60 // global variables
  61 // ---------------------------------------------------------------------------
  62
  63 extern wxWindowList wxModelessWindows;      // from dialog.cpp
  64 extern wxMenu *wxCurrentPopupMenu;
  65
  66 extern wxChar wxMDIFrameClassName[];
  67 extern wxChar wxMDIChildFrameClassName[];
  68 extern wxWindow *wxWndHook;                 // from window.cpp
  69
  70 extern void wxAssociateWinWithHandle(HWND hWnd, wxWindow *win);
  71
  72 static HWND invalidHandle = 0;
  73
  74 // ---------------------------------------------------------------------------
  75 // constants
  76 // ---------------------------------------------------------------------------
  77
  78 static const int IDM_WINDOWTILE  = 4001;
  79 static const int IDM_WINDOWTILEHOR  = 4001;
  80 static const int IDM_WINDOWCASCADE = 4002;
  81 static const int IDM_WINDOWICONS = 4003;
  82 static const int IDM_WINDOWNEXT = 4004;
  83 static const int IDM_WINDOWTILEVERT = 4005;
  84
  85 // This range gives a maximum of 500 MDI children. Should be enough :-)
  86 static const int wxFIRST_MDI_CHILD = 4100;
  87 static const int wxLAST_MDI_CHILD = 4600;
  88
  89 // Status border dimensions
  90 static const int wxTHICK_LINE_BORDER = 3;
  91 static const int wxTHICK_LINE_WIDTH  = 1;
  92
  93 // ---------------------------------------------------------------------------
  94 // private functions
  95 // ---------------------------------------------------------------------------
  96
  97 // set the MDI menus (by sending the WM_MDISETMENU message) and update the menu
  98 // of the parent of win (which is supposed to be the MDI client window)
  99 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow);
 100
 101 // insert the window menu (subMenu) into menu just before "Help" submenu or at
 102 // the very end if not found
 103 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu);
 104
 105 // is this an id of an MDI child?
 106 inline bool IsMdiCommandId(int id)
 107 {
 108     return (id >= wxFIRST_MDI_CHILD) && (id <= wxLAST_MDI_CHILD);
 109 }
 110
 111 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
 112                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact);
 113
 114 // ===========================================================================
 115 // implementation
 116 // ===========================================================================
 117
 118 // ---------------------------------------------------------------------------
 119 // wxWin macros
 120 // ---------------------------------------------------------------------------
 121
 122 #if !USE_SHARED_LIBRARY
 123     IMPLEMENT_DYNAMIC_CLASS(wxMDIParentFrame, wxFrame)
 124     IMPLEMENT_DYNAMIC_CLASS(wxMDIChildFrame, wxFrame)
 125     IMPLEMENT_DYNAMIC_CLASS(wxMDIClientWindow, wxWindow)
 126 #endif // USE_SHARED_LIBRARY
 127
 128 BEGIN_EVENT_TABLE(wxMDIParentFrame, wxFrame)
 129     EVT_SIZE(wxMDIParentFrame::OnSize)
 130     EVT_SYS_COLOUR_CHANGED(wxMDIParentFrame::OnSysColourChanged)
 131 END_EVENT_TABLE()
 132
 133 BEGIN_EVENT_TABLE(wxMDIClientWindow, wxWindow)
 134     EVT_SCROLL(wxMDIClientWindow::OnScroll)
 135 END_EVENT_TABLE()
 136
 137 // ===========================================================================
 138 // wxMDIParentFrame: the frame which contains the client window which manages
 139 // the children
 140 // ===========================================================================
 141
 142 wxMDIParentFrame::wxMDIParentFrame()
 143 {
 144     m_clientWindow = NULL;
 145     m_currentChild = NULL;
 146     m_windowMenu = 0;
 147     m_parentFrameActive = TRUE;
 148 }
 149
 150 bool wxMDIParentFrame::Create(wxWindow *parent,
 151                               wxWindowID id,
 152                               const wxString& title,
 153                               const wxPoint& pos,
 154                               const wxSize& size,
 155                               long style,
 156                               const wxString& name)
 157 {
 158   m_defaultIcon = (WXHICON) (wxSTD_MDIPARENTFRAME_ICON ? wxSTD_MDIPARENTFRAME_ICON : wxDEFAULT_MDIPARENTFRAME_ICON);
 159
 160   m_clientWindow = NULL;
 161   m_currentChild = NULL;
 162   m_windowMenu = 0;
 163   m_parentFrameActive = TRUE;
 164
 165   if (!parent)
 166     wxTopLevelWindows.Append(this);
 167
 168   SetName(name);
 169   m_windowStyle = style;
 170
 171   if (parent) parent->AddChild(this);
 172
 173   if ( id > -1 )
 174     m_windowId = id;
 175   else
 176     m_windowId = (int)NewControlId();
 177
 178   int x = pos.x;
 179   int y = pos.y;
 180   int width = size.x;
 181   int height = size.y;
 182
 183   m_windowMenu = (WXHMENU) ::LoadMenu(wxGetInstance(), wxT("wxWindowMenu"));
 184
 185   DWORD msflags = WS_OVERLAPPED;
 186   if (style & wxMINIMIZE_BOX)
 187     msflags |= WS_MINIMIZEBOX;
 188   if (style & wxMAXIMIZE_BOX)
 189     msflags |= WS_MAXIMIZEBOX;
 190   if (style & wxTHICK_FRAME)
 191     msflags |= WS_THICKFRAME;
 192   if (style & wxSYSTEM_MENU)
 193     msflags |= WS_SYSMENU;
 194   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 195     msflags |= WS_MINIMIZE;
 196   if (style & wxMAXIMIZE)
 197     msflags |= WS_MAXIMIZE;
 198   if (style & wxCAPTION)
 199     msflags |= WS_CAPTION;
 200
 201   if (style & wxCLIP_CHILDREN)
 202     msflags |= WS_CLIPCHILDREN;
 203
 204   wxWindow::MSWCreate(m_windowId, parent, wxMDIFrameClassName, this, title, x, y, width, height,
 205          msflags);
 206
 207   wxModelessWindows.Append(this);
 208
 209   return TRUE;
 210 }
 211
 212 wxMDIParentFrame::~wxMDIParentFrame()
 213 {
 214     DestroyChildren();
 215     // already delete by DestroyChildren()
 216     m_frameToolBar = NULL;
 217
 218     ::DestroyMenu((HMENU)m_windowMenu);
 219     m_windowMenu = 0;
 220
 221     if ( m_clientWindow )
 222     {
 223         if ( m_clientWindow->MSWGetOldWndProc() )
 224             m_clientWindow->UnsubclassWin();
 225
 226         m_clientWindow->SetHWND(0);
 227         delete m_clientWindow;
 228     }
 229 }
 230
 231 void wxMDIParentFrame::InternalSetMenuBar()
 232 {
 233     HMENU subMenu = GetSubMenu((HMENU) m_windowMenu, 0);
 234
 235     m_parentFrameActive = TRUE;
 236
 237     InsertWindowMenu(GetClientWindow(), m_hMenu, subMenu);
 238 }
 239
 240 void wxMDIParentFrame::OnSize(wxSizeEvent& event)
 241 {
 242     if ( GetClientWindow() )
 243     {
 244         int width, height;
 245         GetClientSize(&width, &height);
 246
 247         GetClientWindow()->SetSize(0, 0, width, height);
 248     }
 249 }
 250
 251 // Returns the active MDI child window
 252 wxMDIChildFrame *wxMDIParentFrame::GetActiveChild() const
 253 {
 254     HWND hWnd = (HWND)::SendMessage(GetWinHwnd(GetClientWindow()),
 255                                     WM_MDIGETACTIVE, 0, 0L);
 256     if ( hWnd == 0 )
 257         return NULL;
 258     else
 259         return (wxMDIChildFrame *)wxFindWinFromHandle((WXHWND) hWnd);
 260 }
 261
 262 // Create the client window class (don't Create the window, just return a new
 263 // class)
 264 wxMDIClientWindow *wxMDIParentFrame::OnCreateClient()
 265 {
 266     return new wxMDIClientWindow;
 267 }
 268
 269 // Responds to colour changes, and passes event on to children.
 270 void wxMDIParentFrame::OnSysColourChanged(wxSysColourChangedEvent& event)
 271 {
 272     if ( m_clientWindow )
 273     {
 274         m_clientWindow->SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE));
 275         m_clientWindow->Refresh();
 276     }
 277
 278     event.Skip();
 279 }
 280
 281 // ---------------------------------------------------------------------------
 282 // MDI operations
 283 // ---------------------------------------------------------------------------
 284
 285 void wxMDIParentFrame::Cascade()
 286 {
 287     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDICASCADE, 0, 0);
 288 }
 289
 290 // TODO: add a direction argument (hor/vert)
 291 void wxMDIParentFrame::Tile()
 292 {
 293     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDITILE, MDITILE_HORIZONTAL, 0);
 294 }
 295
 296 void wxMDIParentFrame::ArrangeIcons()
 297 {
 298     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDIICONARRANGE, 0, 0);
 299 }
 300
 301 void wxMDIParentFrame::ActivateNext()
 302 {
 303     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 0);
 304 }
 305
 306 void wxMDIParentFrame::ActivatePrevious()
 307 {
 308     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 1);
 309 }
 310
 311 // ---------------------------------------------------------------------------
 312 // the MDI parent frame window proc
 313 // ---------------------------------------------------------------------------
 314
 315 long wxMDIParentFrame::MSWWindowProc(WXUINT message,
 316                                      WXWPARAM wParam,
 317                                      WXLPARAM lParam)
 318 {
 319     long rc = 0;
 320     bool processed = FALSE;
 321
 322     switch ( message )
 323     {
 324         case WM_ACTIVATE:
 325             {
 326                 WXWORD state, minimized;
 327                 WXHWND hwnd;
 328                 UnpackActivate(wParam, lParam, &state, &minimized, &hwnd);
 329
 330                 processed = HandleActivate(state, minimized != 0, hwnd);
 331             }
 332             break;
 333
 334         case WM_COMMAND:
 335             {
 336                 WXWORD id, cmd;
 337                 WXHWND hwnd;
 338                 UnpackCommand(wParam, lParam, &id, &hwnd, &cmd);
 339
 340                 (void)HandleCommand(id, cmd, hwnd);
 341
 342                 // even if the frame didn't process it, there is no need to try it
 343                 // once again (i.e. call wxFrame::HandleCommand()) - we just dud it,
 344                 // so pretend we processed the message anyhow
 345                 processed = TRUE;
 346             }
 347
 348             // always pass this message DefFrameProc(), otherwise MDI menu
 349             // commands (and sys commands - more surprizingly!) won't work
 350             MSWDefWindowProc(message, wParam, lParam);
 351             break;
 352
 353         case WM_CREATE:
 354             m_clientWindow = OnCreateClient();
 355             // Uses own style for client style
 356             if ( !m_clientWindow->CreateClient(this, GetWindowStyleFlag()) )
 357             {
 358                 wxLogMessage(_("Failed to create MDI parent frame."));
 359
 360                 rc = -1;
 361             }
 362
 363             processed = TRUE;
 364             break;
 365
 366         case WM_ERASEBKGND:
 367             processed = TRUE;
 368
 369             // we erase background ourselves
 370             rc = TRUE;
 371             break;
 372
 373         case WM_MENUSELECT:
 374             {
 375                 WXWORD item, flags;
 376                 WXHMENU hmenu;
 377                 UnpackMenuSelect(wParam, lParam, &item, &flags, &hmenu);
 378
 379                 if ( m_parentFrameActive )
 380                 {
 381                     processed = HandleMenuSelect(item, flags, hmenu);
 382                 }
 383                 else if (m_currentChild)
 384                 {
 385                     processed = m_currentChild->
 386                         HandleMenuSelect(item, flags, hmenu);
 387                 }
 388             }
 389             break;
 390
 391         case WM_SIZE:
 392             // as we don't (usually) resize the MDI client to exactly fit the
 393             // client area (we put it below the toolbar, above statusbar &c),
 394             // we should not pass this one to DefFrameProc
 395             break;
 396     }
 397
 398     if ( !processed )
 399         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 400
 401     return rc;
 402 }
 403
 404 bool wxMDIParentFrame::HandleActivate(int state, bool minimized, WXHWND activate)
 405 {
 406     bool processed = FALSE;
 407
 408     if ( wxWindow::HandleActivate(state, minimized, activate) )
 409     {
 410         // already processed
 411         processed = TRUE;
 412     }
 413
 414     // If this window is an MDI parent, we must also send an OnActivate message
 415     // to the current child.
 416     if ( (m_currentChild != NULL) &&
 417          ((state == WA_ACTIVE) || (state == WA_CLICKACTIVE)) )
 418     {
 419         wxActivateEvent event(wxEVT_ACTIVATE, TRUE, m_currentChild->GetId());
 420         event.SetEventObject( m_currentChild );
 421         if ( m_currentChild->GetEventHandler()->ProcessEvent(event) )
 422             processed = TRUE;
 423     }
 424
 425     return processed;
 426 }
 427
 428 bool wxMDIParentFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 429 {
 430     // In case it's e.g. a toolbar.
 431     if ( hwnd )
 432     {
 433         wxWindow *win = wxFindWinFromHandle(hwnd);
 434         if ( win )
 435             return win->MSWCommand(cmd, id);
 436     }
 437
 438     // is it one of standard MDI commands?
 439     WXWPARAM wParam = 0;
 440     int msg;
 441     switch ( id )
 442     {
 443         case IDM_WINDOWCASCADE:
 444             msg = WM_MDICASCADE;
 445             wParam = MDITILE_SKIPDISABLED;
 446             break;
 447
 448         case IDM_WINDOWTILEHOR:
 449             wParam |= MDITILE_HORIZONTAL;
 450             // fall through
 451
 452         case IDM_WINDOWTILEVERT:
 453             if ( !wParam )
 454                 wParam = MDITILE_VERTICAL;
 455             msg = WM_MDITILE;
 456             wParam |= MDITILE_SKIPDISABLED;
 457             break;
 458
 459         case IDM_WINDOWICONS:
 460             msg = WM_MDIICONARRANGE;
 461             break;
 462
 463         case IDM_WINDOWNEXT:
 464             msg = WM_MDINEXT;
 465             break;
 466
 467         default:
 468             msg = 0;
 469     }
 470
 471     if ( msg )
 472     {
 473         ::SendMessage(GetWinHwnd(GetClientWindow()), msg, wParam, 0);
 474
 475         return TRUE;
 476     }
 477
 478     // FIXME VZ: what does this test do??
 479     if (id >= 0xF000)
 480     {
 481         return FALSE; // Get WndProc to call default proc
 482     }
 483
 484     if ( IsMdiCommandId(id) )
 485     {
 486         wxWindowList::Node* node = GetChildren().GetFirst();
 487         while ( node )
 488         {
 489             wxWindow* child = node->GetData();
 490             if ( child->GetHWND() )
 491             {
 492                 long childId = wxGetWindowId(child->GetHWND());
 493                 if (childId == (long)id)
 494                 {
 495                     ::SendMessage( GetWinHwnd(GetClientWindow()),
 496                                    WM_MDIACTIVATE,
 497                                    (WPARAM)child->GetHWND(), 0);
 498                     return TRUE;
 499                 }
 500             }
 501             node = node->GetNext();
 502         }
 503     }
 504     else if ( m_parentFrameActive )
 505     {
 506         return ProcessCommand(id);
 507     }
 508     else if ( m_currentChild )
 509     {
 510         return m_currentChild->HandleCommand(id, cmd, hwnd);
 511     }
 512     else
 513     {
 514         // this shouldn't happen because it means that our messages are being
 515         // lost (they're not sent to the parent frame nor to the children)
 516         wxFAIL_MSG(wxT("MDI parent frame is not active, "
 517                       "yet there is no active MDI child?"));
 518     }
 519
 520     return FALSE;
 521 }
 522
 523 long wxMDIParentFrame::MSWDefWindowProc(WXUINT message,
 524                                         WXWPARAM wParam,
 525                                         WXLPARAM lParam)
 526 {
 527     WXHWND clientWnd;
 528     if ( GetClientWindow() )
 529         clientWnd = GetClientWindow()->GetHWND();
 530     else
 531         clientWnd = 0;
 532
 533     return DefFrameProc(GetHwnd(), (HWND)clientWnd, message, wParam, lParam);
 534 }
 535
 536 bool wxMDIParentFrame::MSWTranslateMessage(WXMSG* msg)
 537 {
 538     MSG *pMsg = (MSG *)msg;
 539
 540     if ( m_currentChild && m_currentChild->GetHWND() &&
 541          m_currentChild->MSWTranslateMessage(msg) )
 542     {
 543         return TRUE;
 544     }
 545
 546     if ( m_acceleratorTable.Translate(this, msg) )
 547     {
 548         return TRUE;
 549     }
 550
 551     if ( pMsg->message == WM_KEYDOWN || pMsg->message == WM_SYSKEYDOWN )
 552     {
 553         if ( ::TranslateMDISysAccel(GetWinHwnd(GetClientWindow()), pMsg))
 554             return TRUE;
 555     }
 556
 557     return FALSE;
 558 }
 559
 560 // ===========================================================================
 561 // wxMDIChildFrame
 562 // ===========================================================================
 563
 564 wxMDIChildFrame::wxMDIChildFrame()
 565 {
 566 }
 567
 568 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 569                              wxWindowID id,
 570                              const wxString& title,
 571                              const wxPoint& pos,
 572                              const wxSize& size,
 573                              long style,
 574                              const wxString& name)
 575 {
 576   m_defaultIcon = (WXHICON)(wxSTD_MDICHILDFRAME_ICON ? wxSTD_MDICHILDFRAME_ICON
 577                                                      : wxDEFAULT_MDICHILDFRAME_ICON);
 578
 579   SetName(name);
 580
 581   if ( id > -1 )
 582     m_windowId = id;
 583   else
 584     m_windowId = (int)NewControlId();
 585
 586   if ( parent )
 587   {
 588       parent->AddChild(this);
 589   }
 590
 591   wxWndHook = this;
 592
 593   int x = pos.x;
 594   int y = pos.y;
 595   int width = size.x;
 596   int height = size.y;
 597
 598   MDICREATESTRUCT mcs;
 599
 600   mcs.szClass = wxMDIChildFrameClassName;
 601   mcs.szTitle = title;
 602   mcs.hOwner = wxGetInstance();
 603   if (x > -1)
 604       mcs.x = x;
 605   else
 606       mcs.x = CW_USEDEFAULT;
 607
 608   if (y > -1)
 609       mcs.y = y;
 610   else
 611       mcs.y = CW_USEDEFAULT;
 612
 613   if (width > -1)
 614       mcs.cx = width;
 615   else
 616       mcs.cx = CW_USEDEFAULT;
 617
 618   if (height > -1)
 619       mcs.cy = height;
 620   else
 621       mcs.cy = CW_USEDEFAULT;
 622
 623   DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN;
 624   if (style & wxMINIMIZE_BOX)
 625     msflags |= WS_MINIMIZEBOX;
 626   if (style & wxMAXIMIZE_BOX)
 627     msflags |= WS_MAXIMIZEBOX;
 628   if (style & wxTHICK_FRAME)
 629     msflags |= WS_THICKFRAME;
 630   if (style & wxSYSTEM_MENU)
 631     msflags |= WS_SYSMENU;
 632   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 633     msflags |= WS_MINIMIZE;
 634   if (style & wxMAXIMIZE)
 635     msflags |= WS_MAXIMIZE;
 636   if (style & wxCAPTION)
 637     msflags |= WS_CAPTION;
 638
 639   mcs.style = msflags;
 640
 641   mcs.lParam = 0;
 642
 643   DWORD Return = SendMessage(GetWinHwnd(parent->GetClientWindow()),
 644                              WM_MDICREATE, 0, (LONG)(LPSTR)&mcs);
 645
 646   //handle = (HWND)LOWORD(Return);
 647   // Must be the DWORRD for WIN32. And in 16 bits, HIWORD=0 (says Microsoft)
 648   m_hWnd = (WXHWND)Return;
 649
 650   wxWndHook = NULL;
 651   wxAssociateWinWithHandle((HWND) GetHWND(), this);
 652
 653   // VZ: what's this? an act of piracy?
 654   //SetWindowLong(GetHwnd(), 0, (long)this);
 655
 656   wxModelessWindows.Append(this);
 657   return TRUE;
 658 }
 659
 660 wxMDIChildFrame::~wxMDIChildFrame()
 661 {
 662     MSWDestroyWindow();
 663 }
 664
 665 // Set the client size (i.e. leave the calculation of borders etc.
 666 // to wxWindows)
 667 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 668 {
 669   HWND hWnd = GetHwnd();
 670
 671   RECT rect;
 672   ::GetClientRect(hWnd, &rect);
 673
 674   RECT rect2;
 675   GetWindowRect(hWnd, &rect2);
 676
 677   // Find the difference between the entire window (title bar and all)
 678   // and the client area; add this to the new client size to move the
 679   // window
 680   int actual_width = rect2.right - rect2.left - rect.right + width;
 681   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 682
 683   if (GetStatusBar())
 684   {
 685     int sx, sy;
 686     GetStatusBar()->GetSize(&sx, &sy);
 687     actual_height += sy;
 688   }
 689
 690   POINT point;
 691   point.x = rect2.left;
 692   point.y = rect2.top;
 693
 694   // If there's an MDI parent, must subtract the parent's top left corner
 695   // since MoveWindow moves relative to the parent
 696   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 697   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 698
 699   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)TRUE);
 700
 701   wxSizeEvent event(wxSize(width, height), m_windowId);
 702   event.SetEventObject( this );
 703   GetEventHandler()->ProcessEvent(event);
 704 }
 705
 706 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 707 {
 708   RECT rect;
 709   GetWindowRect(GetHwnd(), &rect);
 710   POINT point;
 711   point.x = rect.left;
 712   point.y = rect.top;
 713
 714   // Since we now have the absolute screen coords,
 715   // if there's a parent we must subtract its top left corner
 716   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 717   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 718
 719   *x = point.x;
 720   *y = point.y;
 721 }
 722
 723 void wxMDIChildFrame::InternalSetMenuBar()
 724 {
 725     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 726
 727     HMENU subMenu = GetSubMenu((HMENU)parent->GetWindowMenu(), 0);
 728
 729     InsertWindowMenu(parent->GetClientWindow(), m_hMenu, subMenu);
 730
 731     parent->m_parentFrameActive = FALSE;
 732 }
 733
 734 // ---------------------------------------------------------------------------
 735 // MDI operations
 736 // ---------------------------------------------------------------------------
 737
 738 void wxMDIChildFrame::Maximize(bool maximize)
 739 {
 740     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 741     if ( parent && parent->GetClientWindow() )
 742     {
 743         ::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 744                       maximize ? WM_MDIMAXIMIZE : WM_MDIRESTORE,
 745                       (WPARAM)GetHwnd(), 0);
 746     }
 747 }
 748
 749 void wxMDIChildFrame::Restore()
 750 {
 751     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 752     if ( parent && parent->GetClientWindow() )
 753     {
 754         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIRESTORE,
 755                       (WPARAM) GetHwnd(), 0);
 756     }
 757 }
 758
 759 void wxMDIChildFrame::Activate()
 760 {
 761     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 762     if ( parent && parent->GetClientWindow() )
 763     {
 764         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIACTIVATE,
 765                       (WPARAM) GetHwnd(), 0);
 766     }
 767 }
 768
 769 // ---------------------------------------------------------------------------
 770 // MDI window proc and message handlers
 771 // ---------------------------------------------------------------------------
 772
 773 long wxMDIChildFrame::MSWWindowProc(WXUINT message,
 774                                     WXWPARAM wParam,
 775                                     WXLPARAM lParam)
 776 {
 777     long rc = 0;
 778     bool processed = FALSE;
 779
 780     switch ( message )
 781     {
 782         case WM_COMMAND:
 783             {
 784                 WORD id, cmd;
 785                 WXHWND hwnd;
 786                 UnpackCommand((WXWPARAM)wParam, (WXLPARAM)lParam,
 787                               &id, &hwnd, &cmd);
 788
 789                 processed = HandleCommand(id, cmd, (WXHWND)hwnd);
 790             }
 791             break;
 792
 793         case WM_GETMINMAXINFO:
 794             // let the default window proc calculate the size of MDI children
 795             // frames because it is based on the size of the MDI client window,
 796             // not on the values specified in wxWindow m_min/max variables
 797             return MSWDefWindowProc(message, wParam, lParam);
 798
 799         case WM_MDIACTIVATE:
 800             {
 801                 WXWORD act;
 802                 WXHWND hwndAct, hwndDeact;
 803                 UnpackMDIActivate(wParam, lParam, &act, &hwndAct, &hwndDeact);
 804
 805                 processed = HandleMDIActivate(act, hwndAct, hwndDeact);
 806             }
 807             // fall through
 808
 809         case WM_MOVE:
 810             // must pass WM_MOVE to DefMDIChildProc() to recalculate MDI client
 811             // scrollbars if necessary
 812
 813             // fall through
 814
 815         case WM_SIZE:
 816             // must pass WM_SIZE to DefMDIChildProc(), otherwise many weird
 817             // things happen
 818             MSWDefWindowProc(message, wParam, lParam);
 819             break;
 820
 821         case WM_SYSCOMMAND:
 822             // DefMDIChildProc handles SC_{NEXT/PREV}WINDOW here, so pass it
 823             // the message (the base class version does not)
 824             return MSWDefWindowProc(message, wParam, lParam);
 825
 826         case WM_WINDOWPOSCHANGING:
 827             processed = HandleWindowPosChanging((LPWINDOWPOS)lParam);
 828             break;
 829     }
 830
 831     if ( !processed )
 832         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 833
 834     return rc;
 835 }
 836
 837 bool wxMDIChildFrame::HandleSize(int x, int y, WXUINT id)
 838 {
 839     HWND hwnd = GetHwnd();
 840
 841     if ( !hwnd || hwnd == invalidHandle )
 842     {
 843         return FALSE;
 844     }
 845
 846     switch (id)
 847     {
 848         case SIZEFULLSCREEN:
 849         case SIZENORMAL:
 850             m_iconized = FALSE;
 851             break;
 852
 853         case SIZEICONIC:
 854             m_iconized = TRUE;
 855             break;
 856     }
 857
 858     if ( !m_iconized )
 859     {
 860         // forward WM_SIZE to status bar control
 861 #if wxUSE_NATIVE_STATUSBAR
 862         if (m_frameStatusBar && m_frameStatusBar->IsKindOf(CLASSINFO(wxStatusBar95)))
 863         {
 864             wxSizeEvent event(wxSize(x, y), m_frameStatusBar->GetId());
 865             event.SetEventObject( m_frameStatusBar );
 866
 867             ((wxStatusBar95 *)m_frameStatusBar)->OnSize(event);
 868         }
 869 #endif // wxUSE_NATIVE_STATUSBAR
 870
 871         PositionStatusBar();
 872         PositionToolBar();
 873
 874         return wxWindow::HandleSize(x, y, id);
 875     }
 876     else
 877     {
 878         return FALSE;
 879     }
 880 }
 881
 882 bool wxMDIChildFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 883 {
 884     // In case it's e.g. a toolbar.
 885     if ( hwnd )
 886     {
 887         wxWindow *win = wxFindWinFromHandle(hwnd);
 888         if (win)
 889             return win->MSWCommand(cmd, id);
 890     }
 891
 892     if (wxCurrentPopupMenu)
 893     {
 894         wxMenu *popupMenu = wxCurrentPopupMenu;
 895         wxCurrentPopupMenu = NULL;
 896         if (popupMenu->MSWCommand(cmd, id))
 897             return TRUE;
 898     }
 899
 900     if (GetMenuBar() && GetMenuBar()->FindItem(id))
 901     {
 902         ProcessCommand(id);
 903         return TRUE;
 904     }
 905     else
 906         return FALSE;
 907
 908     return TRUE;
 909 }
 910
 911 bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
 912                                         WXHWND hwndAct,
 913                                         WXHWND hwndDeact)
 914 {
 915     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 916
 917     HMENU menuToSet = 0;
 918
 919     bool activated;
 920
 921     if ( m_hWnd == hwndAct )
 922     {
 923         activated = TRUE;
 924         parent->m_currentChild = this;
 925
 926         HMENU child_menu = (HMENU)GetWinMenu();
 927         if ( child_menu )
 928         {
 929             parent->m_parentFrameActive = FALSE;
 930
 931             menuToSet = child_menu;
 932         }
 933     }
 934     else if ( m_hWnd == hwndDeact )
 935     {
 936         wxASSERT_MSG( parent->m_currentChild == this,
 937                       wxT("can't deactivate MDI child which wasn't active!") );
 938
 939         activated = FALSE;
 940         parent->m_currentChild = NULL;
 941
 942         HMENU parent_menu = (HMENU)parent->GetWinMenu();
 943         if ( parent_menu )
 944         {
 945             parent->m_parentFrameActive = TRUE;
 946
 947             menuToSet = parent_menu;
 948         }
 949     }
 950     else
 951     {
 952         // we have nothing to with it
 953         return FALSE;
 954     }
 955
 956     if ( menuToSet )
 957     {
 958         HMENU subMenu = GetSubMenu((HMENU) parent->GetWindowMenu(), 0);
 959
 960         MDISetMenu(parent->GetClientWindow(), menuToSet, subMenu);
 961     }
 962
 963     wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
 964     event.SetEventObject( this );
 965
 966     return GetEventHandler()->ProcessEvent(event);
 967 }
 968
 969 bool wxMDIChildFrame::HandleWindowPosChanging(void *pos)
 970 {
 971     WINDOWPOS *lpPos = (WINDOWPOS *)pos;
 972 #if defined(__WIN95__)
 973     if (!(lpPos->flags & SWP_NOSIZE))
 974     {
 975         RECT rectClient;
 976         DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
 977         DWORD dwStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 978         if (ResetWindowStyle((void *) & rectClient) && (dwStyle & WS_MAXIMIZE))
 979         {
 980             ::AdjustWindowRectEx(&rectClient, dwStyle, FALSE, dwExStyle);
 981             lpPos->x = rectClient.left;
 982             lpPos->y = rectClient.top;
 983             lpPos->cx = rectClient.right - rectClient.left;
 984             lpPos->cy = rectClient.bottom - rectClient.top;
 985         }
 986         wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
 987         if (pFrameWnd && pFrameWnd->GetToolBar())
 988         {
 989             pFrameWnd->GetToolBar()->Refresh();
 990         }
 991     }
 992 #endif // Win95
 993
 994     return FALSE;
 995 }
 996
 997 // ---------------------------------------------------------------------------
 998 // MDI specific message translation/preprocessing
 999 // ---------------------------------------------------------------------------
1000
1001 long wxMDIChildFrame::MSWDefWindowProc(WXUINT message, WXUINT wParam, WXLPARAM lParam)
1002 {
1003     return DefMDIChildProc(GetHwnd(),
1004                            (UINT)message, (WPARAM)wParam, (LPARAM)lParam);
1005 }
1006
1007 bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
1008 {
1009     return m_acceleratorTable.Translate(GetParent(), msg);
1010 }
1011
1012 // ---------------------------------------------------------------------------
1013 // misc
1014 // ---------------------------------------------------------------------------
1015
1016 void wxMDIChildFrame::MSWDestroyWindow()
1017 {
1018     MSWDetachWindowMenu();
1019     invalidHandle = GetHwnd();
1020
1021     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
1022
1023     // Must make sure this handle is invalidated (set to NULL) since all sorts
1024     // of things could happen after the child client is destroyed, but before
1025     // the wxFrame is destroyed.
1026
1027     HWND oldHandle = (HWND)GetHWND();
1028     SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIDESTROY,
1029                 (WPARAM)oldHandle, 0);
1030     invalidHandle = 0;
1031
1032     if (m_hMenu)
1033     {
1034         ::DestroyMenu((HMENU) m_hMenu);
1035         m_hMenu = 0;
1036     }
1037     m_hWnd = 0;
1038 }
1039
1040 // Change the client window's extended style so we don't get a client edge
1041 // style when a child is maximised (a double border looks silly.)
1042 bool wxMDIChildFrame::ResetWindowStyle(void *vrect)
1043 {
1044 #if defined(__WIN95__)
1045     RECT *rect = (RECT *)vrect;
1046     wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
1047     wxMDIChildFrame* pChild = pFrameWnd->GetActiveChild();
1048     if (!pChild || (pChild == this))
1049     {
1050         DWORD dwStyle = ::GetWindowLong(GetWinHwnd(pFrameWnd->GetClientWindow()), GWL_EXSTYLE);
1051         DWORD dwThisStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1052         DWORD dwNewStyle = dwStyle;
1053         if (pChild != NULL && (dwThisStyle & WS_MAXIMIZE))
1054             dwNewStyle &= ~(WS_EX_CLIENTEDGE);
1055         else
1056             dwNewStyle |= WS_EX_CLIENTEDGE;
1057
1058         if (dwStyle != dwNewStyle)
1059         {
1060             HWND hwnd = GetWinHwnd(pFrameWnd->GetClientWindow());
1061             ::RedrawWindow(hwnd, NULL, NULL, RDW_INVALIDATE | RDW_ALLCHILDREN);
1062             ::SetWindowLong(hwnd, GWL_EXSTYLE, dwNewStyle);
1063             ::SetWindowPos(hwnd, NULL, 0, 0, 0, 0,
1064                            SWP_FRAMECHANGED | SWP_NOACTIVATE |
1065                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
1066                            SWP_NOCOPYBITS);
1067             if (rect)
1068                 ::GetClientRect(hwnd, rect);
1069
1070             return TRUE;
1071         }
1072     }
1073 #endif // Win95
1074
1075     return FALSE;
1076 }
1077
1078 // ===========================================================================
1079 // wxMDIClientWindow: the window of predefined (by Windows) class which
1080 // contains the child frames
1081 // ===========================================================================
1082
1083 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
1084 {
1085     m_backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE);
1086
1087     CLIENTCREATESTRUCT ccs;
1088     m_windowStyle = style;
1089     m_parent = parent;
1090
1091     ccs.hWindowMenu = (HMENU)parent->GetWindowMenu();
1092     ccs.idFirstChild = wxFIRST_MDI_CHILD;
1093
1094     DWORD msStyle = WS_VISIBLE | WS_CHILD | WS_CLIPCHILDREN;
1095     if ( style & wxHSCROLL )
1096         msStyle |= WS_HSCROLL;
1097     if ( style & wxVSCROLL )
1098         msStyle |= WS_VSCROLL;
1099
1100 #if defined(__WIN95__)
1101     DWORD exStyle = WS_EX_CLIENTEDGE;
1102 #else
1103     DWORD exStyle = 0;
1104 #endif
1105
1106     wxWndHook = this;
1107     m_hWnd = (WXHWND)::CreateWindowEx
1108                        (
1109                         exStyle,
1110                         wxT("MDICLIENT"),
1111                         NULL,
1112                         msStyle,
1113                         0, 0, 0, 0,
1114                         GetWinHwnd(parent),
1115                         NULL,
1116                         wxGetInstance(),
1117                         (LPSTR)(LPCLIENTCREATESTRUCT)&ccs);
1118     if ( !m_hWnd )
1119     {
1120         wxLogLastError("CreateWindowEx(MDI client)");
1121
1122         return FALSE;
1123     }
1124
1125     SubclassWin(m_hWnd);
1126     wxWndHook = NULL;
1127
1128     return TRUE;
1129 }
1130
1131 // Explicitly call default scroll behaviour
1132 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
1133 {
1134     // Note: for client windows, the scroll position is not set in
1135     // WM_HSCROLL, WM_VSCROLL, so we can't easily determine what
1136     // scroll position we're at.
1137     // This makes it hard to paint patterns or bitmaps in the background,
1138     // and have the client area scrollable as well.
1139
1140     if ( event.GetOrientation() == wxHORIZONTAL )
1141         m_scrollX = event.GetPosition(); // Always returns zero!
1142     else
1143         m_scrollY = event.GetPosition(); // Always returns zero!
1144
1145     event.Skip();
1146 }
1147
1148 // ---------------------------------------------------------------------------
1149 // non member functions
1150 // ---------------------------------------------------------------------------
1151
1152 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow)
1153 {
1154     ::SendMessage(GetWinHwnd(win), WM_MDISETMENU,
1155 #ifdef __WIN32__
1156                   (WPARAM)hmenuFrame, (LPARAM)hmenuWindow);
1157 #else
1158                   0, MAKELPARAM(hmenuFrame, hmenuWindow));
1159 #endif
1160
1161     // update menu bar of the parent window
1162     wxWindow *parent = win->GetParent();
1163     wxCHECK_RET( parent, wxT("MDI client without parent frame? weird...") );
1164
1165     ::DrawMenuBar(GetWinHwnd(parent));
1166 }
1167
1168 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu)
1169 {
1170     // Try to insert Window menu in front of Help, otherwise append it.
1171     HMENU hmenu = (HMENU)menu;
1172     int N = GetMenuItemCount(hmenu);
1173     bool success = FALSE;
1174     for ( int i = 0; i < N; i++ )
1175     {
1176         wxChar buf[256];
1177         int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1178         if ( chars == 0 )
1179         {
1180             wxLogLastError(wxT("GetMenuString"));
1181
1182             continue;
1183         }
1184
1185         if ( wxStripMenuCodes(wxString(buf)).IsSameAs(wxT("Help")) )
1186         {
1187             success = TRUE;
1188             ::InsertMenu(hmenu, i, MF_BYPOSITION | MF_POPUP | MF_STRING,
1189                          (UINT)subMenu, wxT("&Window"));
1190             break;
1191         }
1192     }
1193
1194     if ( !success )
1195     {
1196         ::AppendMenu(hmenu, MF_POPUP, (UINT)subMenu, wxT("&Window"));
1197     }
1198
1199     MDISetMenu(win, hmenu, subMenu);
1200 }
1201
1202 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
1203                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact)
1204 {
1205 #ifdef __WIN32__
1206     *activate = TRUE;
1207     *hwndAct = (WXHWND)lParam;
1208     *hwndDeact = (WXHWND)wParam;
1209 #else // Win16
1210     *activate = (WXWORD)wParam;
1211     *hwndAct = (WXHWND)LOWORD(lParam);
1212     *hwndDeact = (WXHWND)HIWORD(lParam);
1213 #endif // Win32/Win16
1214 }