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 const wxChar *wxMDIFrameClassName;
  67 extern const wxChar *wxMDIChildFrameClassName;
  68 extern wxWindow *wxWndHook;                 // from window.cpp
  69
  70 extern void wxAssociateWinWithHandle(HWND hWnd, wxWindow *win);
  71 extern void wxRemoveHandleAssociation(wxWindow *win);
  72
  73 static HWND invalidHandle = 0;
  74
  75 // ---------------------------------------------------------------------------
  76 // constants
  77 // ---------------------------------------------------------------------------
  78
  79 static const int IDM_WINDOWTILE  = 4001;
  80 static const int IDM_WINDOWTILEHOR  = 4001;
  81 static const int IDM_WINDOWCASCADE = 4002;
  82 static const int IDM_WINDOWICONS = 4003;
  83 static const int IDM_WINDOWNEXT = 4004;
  84 static const int IDM_WINDOWTILEVERT = 4005;
  85
  86 // This range gives a maximum of 500 MDI children. Should be enough :-)
  87 static const int wxFIRST_MDI_CHILD = 4100;
  88 static const int wxLAST_MDI_CHILD = 4600;
  89
  90 // Status border dimensions
  91 static const int wxTHICK_LINE_BORDER = 3;
  92 static const int wxTHICK_LINE_WIDTH  = 1;
  93
  94 // ---------------------------------------------------------------------------
  95 // private functions
  96 // ---------------------------------------------------------------------------
  97
  98 // set the MDI menus (by sending the WM_MDISETMENU message) and update the menu
  99 // of the parent of win (which is supposed to be the MDI client window)
 100 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow);
 101
 102 // insert the window menu (subMenu) into menu just before "Help" submenu or at
 103 // the very end if not found
 104 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu);
 105
 106 // Remove the window menu
 107 static void RemoveWindowMenu(wxWindow *win, WXHMENU menu);
 108
 109 // is this an id of an MDI child?
 110 inline bool IsMdiCommandId(int id)
 111 {
 112     return (id >= wxFIRST_MDI_CHILD) && (id <= wxLAST_MDI_CHILD);
 113 }
 114
 115 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
 116                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact);
 117
 118 // ===========================================================================
 119 // implementation
 120 // ===========================================================================
 121
 122 // ---------------------------------------------------------------------------
 123 // wxWin macros
 124 // ---------------------------------------------------------------------------
 125
 126 IMPLEMENT_DYNAMIC_CLASS(wxMDIParentFrame, wxFrame)
 127 IMPLEMENT_DYNAMIC_CLASS(wxMDIChildFrame, wxFrame)
 128 IMPLEMENT_DYNAMIC_CLASS(wxMDIClientWindow, wxWindow)
 129
 130 BEGIN_EVENT_TABLE(wxMDIParentFrame, wxFrame)
 131     EVT_SIZE(wxMDIParentFrame::OnSize)
 132     EVT_SYS_COLOUR_CHANGED(wxMDIParentFrame::OnSysColourChanged)
 133 END_EVENT_TABLE()
 134
 135 BEGIN_EVENT_TABLE(wxMDIClientWindow, wxWindow)
 136     EVT_SCROLL(wxMDIClientWindow::OnScroll)
 137 END_EVENT_TABLE()
 138
 139 // ===========================================================================
 140 // wxMDIParentFrame: the frame which contains the client window which manages
 141 // the children
 142 // ===========================================================================
 143
 144 wxMDIParentFrame::wxMDIParentFrame()
 145 {
 146     m_clientWindow = NULL;
 147     m_currentChild = NULL;
 148     m_windowMenu = (wxMenu*) NULL;
 149     m_parentFrameActive = TRUE;
 150 }
 151
 152 bool wxMDIParentFrame::Create(wxWindow *parent,
 153                               wxWindowID id,
 154                               const wxString& title,
 155                               const wxPoint& pos,
 156                               const wxSize& size,
 157                               long style,
 158                               const wxString& name)
 159 {
 160   m_defaultIcon = (WXHICON) (wxSTD_MDIPARENTFRAME_ICON ? wxSTD_MDIPARENTFRAME_ICON : wxDEFAULT_MDIPARENTFRAME_ICON);
 161
 162   m_clientWindow = NULL;
 163   m_currentChild = NULL;
 164
 165   if (style & wxFRAME_NO_WINDOW_MENU)
 166       m_windowMenu = (wxMenu*) NULL;
 167   else
 168   {
 169   // m_windowMenu = (WXHMENU) ::LoadMenu(wxGetInstance(), wxT("wxWindowMenu"));
 170       m_windowMenu = new wxMenu;
 171
 172
 173       m_windowMenu->Append(4002, wxT("&Cascade"));
 174       m_windowMenu->Append(4001, wxT("Tile &Horizontally"));
 175       m_windowMenu->Append(4005, wxT("Tile &Vertically"));
 176       m_windowMenu->AppendSeparator();
 177       m_windowMenu->Append(4003, wxT("&Arrange Icons"));
 178       m_windowMenu->Append(4004, wxT("&Next"));
 179   }
 180
 181   m_parentFrameActive = TRUE;
 182
 183   if (!parent)
 184     wxTopLevelWindows.Append(this);
 185
 186   SetName(name);
 187   m_windowStyle = style;
 188
 189   if (parent) parent->AddChild(this);
 190
 191   if ( id > -1 )
 192     m_windowId = id;
 193   else
 194     m_windowId = (int)NewControlId();
 195
 196   int x = pos.x;
 197   int y = pos.y;
 198   int width = size.x;
 199   int height = size.y;
 200
 201   DWORD msflags = WS_OVERLAPPED;
 202   if (style & wxMINIMIZE_BOX)
 203     msflags |= WS_MINIMIZEBOX;
 204   if (style & wxMAXIMIZE_BOX)
 205     msflags |= WS_MAXIMIZEBOX;
 206   if (style & wxTHICK_FRAME)
 207     msflags |= WS_THICKFRAME;
 208   if (style & wxSYSTEM_MENU)
 209     msflags |= WS_SYSMENU;
 210   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 211     msflags |= WS_MINIMIZE;
 212   if (style & wxMAXIMIZE)
 213     msflags |= WS_MAXIMIZE;
 214   if (style & wxCAPTION)
 215     msflags |= WS_CAPTION;
 216
 217   if (style & wxCLIP_CHILDREN)
 218     msflags |= WS_CLIPCHILDREN;
 219
 220   wxWindow::MSWCreate(m_windowId, parent, wxMDIFrameClassName, this, title, x, y, width, height,
 221          msflags);
 222
 223   wxModelessWindows.Append(this);
 224
 225   return TRUE;
 226 }
 227
 228 wxMDIParentFrame::~wxMDIParentFrame()
 229 {
 230     DestroyChildren();
 231     // already delete by DestroyChildren()
 232     m_frameToolBar = NULL;
 233
 234     // ::DestroyMenu((HMENU)m_windowMenu);
 235     if (m_windowMenu)
 236     {
 237         delete m_windowMenu;
 238         m_windowMenu = (wxMenu*) NULL;
 239     }
 240
 241     if ( m_clientWindow )
 242     {
 243         if ( m_clientWindow->MSWGetOldWndProc() )
 244             m_clientWindow->UnsubclassWin();
 245
 246         m_clientWindow->SetHWND(0);
 247         delete m_clientWindow;
 248     }
 249 }
 250
 251 void wxMDIParentFrame::InternalSetMenuBar()
 252 {
 253 //    HMENU subMenu = GetSubMenu((HMENU) m_windowMenu, 0);
 254
 255     m_parentFrameActive = TRUE;
 256
 257     HMENU subMenu = (HMENU) 0;
 258     if (GetWindowMenu())
 259         subMenu = (HMENU) GetWindowMenu()->GetHMenu();
 260
 261     InsertWindowMenu(GetClientWindow(), m_hMenu, subMenu);
 262 }
 263
 264 void wxMDIParentFrame::SetWindowMenu(wxMenu* menu)
 265 {
 266     if (m_windowMenu)
 267     {
 268         if (GetMenuBar())
 269         {
 270             // Remove old window menu
 271             RemoveWindowMenu(GetClientWindow(), m_hMenu);
 272         }
 273
 274         delete m_windowMenu;
 275         m_windowMenu = (wxMenu*) NULL;
 276     }
 277     if (menu)
 278     {
 279         m_windowMenu = menu;
 280         if (GetMenuBar())
 281             InsertWindowMenu(GetClientWindow(), m_hMenu, (HMENU) m_windowMenu->GetHMenu());
 282     }
 283 }
 284
 285 void wxMDIParentFrame::OnSize(wxSizeEvent& event)
 286 {
 287     if ( GetClientWindow() )
 288     {
 289         int width, height;
 290         GetClientSize(&width, &height);
 291
 292         GetClientWindow()->SetSize(0, 0, width, height);
 293     }
 294 }
 295
 296 // Returns the active MDI child window
 297 wxMDIChildFrame *wxMDIParentFrame::GetActiveChild() const
 298 {
 299     HWND hWnd = (HWND)::SendMessage(GetWinHwnd(GetClientWindow()),
 300                                     WM_MDIGETACTIVE, 0, 0L);
 301     if ( hWnd == 0 )
 302         return NULL;
 303     else
 304         return (wxMDIChildFrame *)wxFindWinFromHandle((WXHWND) hWnd);
 305 }
 306
 307 // Create the client window class (don't Create the window, just return a new
 308 // class)
 309 wxMDIClientWindow *wxMDIParentFrame::OnCreateClient()
 310 {
 311     return new wxMDIClientWindow;
 312 }
 313
 314 // Responds to colour changes, and passes event on to children.
 315 void wxMDIParentFrame::OnSysColourChanged(wxSysColourChangedEvent& event)
 316 {
 317     if ( m_clientWindow )
 318     {
 319         m_clientWindow->SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE));
 320         m_clientWindow->Refresh();
 321     }
 322
 323     event.Skip();
 324 }
 325
 326 // ---------------------------------------------------------------------------
 327 // MDI operations
 328 // ---------------------------------------------------------------------------
 329
 330 void wxMDIParentFrame::Cascade()
 331 {
 332     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDICASCADE, 0, 0);
 333 }
 334
 335 // TODO: add a direction argument (hor/vert)
 336 void wxMDIParentFrame::Tile()
 337 {
 338     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDITILE, MDITILE_HORIZONTAL, 0);
 339 }
 340
 341 void wxMDIParentFrame::ArrangeIcons()
 342 {
 343     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDIICONARRANGE, 0, 0);
 344 }
 345
 346 void wxMDIParentFrame::ActivateNext()
 347 {
 348     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 0);
 349 }
 350
 351 void wxMDIParentFrame::ActivatePrevious()
 352 {
 353     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 1);
 354 }
 355
 356 // ---------------------------------------------------------------------------
 357 // the MDI parent frame window proc
 358 // ---------------------------------------------------------------------------
 359
 360 long wxMDIParentFrame::MSWWindowProc(WXUINT message,
 361                                      WXWPARAM wParam,
 362                                      WXLPARAM lParam)
 363 {
 364     long rc = 0;
 365     bool processed = FALSE;
 366
 367     switch ( message )
 368     {
 369         case WM_ACTIVATE:
 370             {
 371                 WXWORD state, minimized;
 372                 WXHWND hwnd;
 373                 UnpackActivate(wParam, lParam, &state, &minimized, &hwnd);
 374
 375                 processed = HandleActivate(state, minimized != 0, hwnd);
 376             }
 377             break;
 378
 379         case WM_COMMAND:
 380             {
 381                 WXWORD id, cmd;
 382                 WXHWND hwnd;
 383                 UnpackCommand(wParam, lParam, &id, &hwnd, &cmd);
 384
 385                 (void)HandleCommand(id, cmd, hwnd);
 386
 387                 // even if the frame didn't process it, there is no need to try it
 388                 // once again (i.e. call wxFrame::HandleCommand()) - we just dud it,
 389                 // so pretend we processed the message anyhow
 390                 processed = TRUE;
 391             }
 392
 393             // always pass this message DefFrameProc(), otherwise MDI menu
 394             // commands (and sys commands - more surprizingly!) won't work
 395             MSWDefWindowProc(message, wParam, lParam);
 396             break;
 397
 398         case WM_CREATE:
 399             m_clientWindow = OnCreateClient();
 400             // Uses own style for client style
 401             if ( !m_clientWindow->CreateClient(this, GetWindowStyleFlag()) )
 402             {
 403                 wxLogMessage(_("Failed to create MDI parent frame."));
 404
 405                 rc = -1;
 406             }
 407
 408             processed = TRUE;
 409             break;
 410
 411         case WM_ERASEBKGND:
 412             processed = TRUE;
 413
 414             // we erase background ourselves
 415             rc = TRUE;
 416             break;
 417
 418         case WM_MENUSELECT:
 419             {
 420                 WXWORD item, flags;
 421                 WXHMENU hmenu;
 422                 UnpackMenuSelect(wParam, lParam, &item, &flags, &hmenu);
 423
 424                 if ( m_parentFrameActive )
 425                 {
 426                     processed = HandleMenuSelect(item, flags, hmenu);
 427                 }
 428                 else if (m_currentChild)
 429                 {
 430                     processed = m_currentChild->
 431                         HandleMenuSelect(item, flags, hmenu);
 432                 }
 433             }
 434             break;
 435
 436         case WM_SIZE:
 437             // as we don't (usually) resize the MDI client to exactly fit the
 438             // client area (we put it below the toolbar, above statusbar &c),
 439             // we should not pass this one to DefFrameProc
 440             break;
 441     }
 442
 443     if ( !processed )
 444         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 445
 446     return rc;
 447 }
 448
 449 bool wxMDIParentFrame::HandleActivate(int state, bool minimized, WXHWND activate)
 450 {
 451     bool processed = FALSE;
 452
 453     if ( wxWindow::HandleActivate(state, minimized, activate) )
 454     {
 455         // already processed
 456         processed = TRUE;
 457     }
 458
 459     // If this window is an MDI parent, we must also send an OnActivate message
 460     // to the current child.
 461     if ( (m_currentChild != NULL) &&
 462          ((state == WA_ACTIVE) || (state == WA_CLICKACTIVE)) )
 463     {
 464         wxActivateEvent event(wxEVT_ACTIVATE, TRUE, m_currentChild->GetId());
 465         event.SetEventObject( m_currentChild );
 466         if ( m_currentChild->GetEventHandler()->ProcessEvent(event) )
 467             processed = TRUE;
 468     }
 469
 470     return processed;
 471 }
 472
 473 bool wxMDIParentFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 474 {
 475     // In case it's e.g. a toolbar.
 476     if ( hwnd )
 477     {
 478         wxWindow *win = wxFindWinFromHandle(hwnd);
 479         if ( win )
 480             return win->MSWCommand(cmd, id);
 481     }
 482
 483     // is it one of standard MDI commands?
 484     WXWPARAM wParam = 0;
 485     int msg;
 486     switch ( id )
 487     {
 488         case IDM_WINDOWCASCADE:
 489             msg = WM_MDICASCADE;
 490             wParam = MDITILE_SKIPDISABLED;
 491             break;
 492
 493         case IDM_WINDOWTILEHOR:
 494             wParam |= MDITILE_HORIZONTAL;
 495             // fall through
 496
 497         case IDM_WINDOWTILEVERT:
 498             if ( !wParam )
 499                 wParam = MDITILE_VERTICAL;
 500             msg = WM_MDITILE;
 501             wParam |= MDITILE_SKIPDISABLED;
 502             break;
 503
 504         case IDM_WINDOWICONS:
 505             msg = WM_MDIICONARRANGE;
 506             break;
 507
 508         case IDM_WINDOWNEXT:
 509             msg = WM_MDINEXT;
 510             break;
 511
 512         default:
 513             msg = 0;
 514     }
 515
 516     if ( msg )
 517     {
 518         ::SendMessage(GetWinHwnd(GetClientWindow()), msg, wParam, 0);
 519
 520         return TRUE;
 521     }
 522
 523     // FIXME VZ: what does this test do??
 524     if (id >= 0xF000)
 525     {
 526         return FALSE; // Get WndProc to call default proc
 527     }
 528
 529     if ( IsMdiCommandId(id) )
 530     {
 531         wxWindowList::Node* node = GetChildren().GetFirst();
 532         while ( node )
 533         {
 534             wxWindow* child = node->GetData();
 535             if ( child->GetHWND() )
 536             {
 537                 long childId = wxGetWindowId(child->GetHWND());
 538                 if (childId == (long)id)
 539                 {
 540                     ::SendMessage( GetWinHwnd(GetClientWindow()),
 541                                    WM_MDIACTIVATE,
 542                                    (WPARAM)child->GetHWND(), 0);
 543                     return TRUE;
 544                 }
 545             }
 546             node = node->GetNext();
 547         }
 548     }
 549     else if ( m_parentFrameActive )
 550     {
 551         return ProcessCommand(id);
 552     }
 553     else if ( m_currentChild )
 554     {
 555         return m_currentChild->HandleCommand(id, cmd, hwnd);
 556     }
 557     else
 558     {
 559         // this shouldn't happen because it means that our messages are being
 560         // lost (they're not sent to the parent frame nor to the children)
 561         wxFAIL_MSG(wxT("MDI parent frame is not active, "
 562                       "yet there is no active MDI child?"));
 563     }
 564
 565     return FALSE;
 566 }
 567
 568 long wxMDIParentFrame::MSWDefWindowProc(WXUINT message,
 569                                         WXWPARAM wParam,
 570                                         WXLPARAM lParam)
 571 {
 572     WXHWND clientWnd;
 573     if ( GetClientWindow() )
 574         clientWnd = GetClientWindow()->GetHWND();
 575     else
 576         clientWnd = 0;
 577
 578     return DefFrameProc(GetHwnd(), (HWND)clientWnd, message, wParam, lParam);
 579 }
 580
 581 bool wxMDIParentFrame::MSWTranslateMessage(WXMSG* msg)
 582 {
 583     MSG *pMsg = (MSG *)msg;
 584
 585     if ( m_currentChild && m_currentChild->GetHWND() &&
 586          m_currentChild->MSWTranslateMessage(msg) )
 587     {
 588         return TRUE;
 589     }
 590
 591     if ( m_acceleratorTable.Translate(this, msg) )
 592     {
 593         return TRUE;
 594     }
 595
 596     if ( pMsg->message == WM_KEYDOWN || pMsg->message == WM_SYSKEYDOWN )
 597     {
 598         if ( ::TranslateMDISysAccel(GetWinHwnd(GetClientWindow()), pMsg))
 599             return TRUE;
 600     }
 601
 602     return FALSE;
 603 }
 604
 605 // ===========================================================================
 606 // wxMDIChildFrame
 607 // ===========================================================================
 608
 609 wxMDIChildFrame::wxMDIChildFrame()
 610 {
 611 }
 612
 613 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 614                              wxWindowID id,
 615                              const wxString& title,
 616                              const wxPoint& pos,
 617                              const wxSize& size,
 618                              long style,
 619                              const wxString& name)
 620 {
 621   m_defaultIcon = (WXHICON)(wxSTD_MDICHILDFRAME_ICON ? wxSTD_MDICHILDFRAME_ICON
 622                                                      : wxDEFAULT_MDICHILDFRAME_ICON);
 623
 624   SetName(name);
 625
 626   if ( id > -1 )
 627     m_windowId = id;
 628   else
 629     m_windowId = (int)NewControlId();
 630
 631   if ( parent )
 632   {
 633       parent->AddChild(this);
 634   }
 635
 636   wxWndHook = this;
 637
 638   int x = pos.x;
 639   int y = pos.y;
 640   int width = size.x;
 641   int height = size.y;
 642
 643   MDICREATESTRUCT mcs;
 644
 645   mcs.szClass = wxMDIChildFrameClassName;
 646   mcs.szTitle = title;
 647   mcs.hOwner = wxGetInstance();
 648   if (x > -1)
 649       mcs.x = x;
 650   else
 651       mcs.x = CW_USEDEFAULT;
 652
 653   if (y > -1)
 654       mcs.y = y;
 655   else
 656       mcs.y = CW_USEDEFAULT;
 657
 658   if (width > -1)
 659       mcs.cx = width;
 660   else
 661       mcs.cx = CW_USEDEFAULT;
 662
 663   if (height > -1)
 664       mcs.cy = height;
 665   else
 666       mcs.cy = CW_USEDEFAULT;
 667
 668   DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN;
 669   if (style & wxMINIMIZE_BOX)
 670     msflags |= WS_MINIMIZEBOX;
 671   if (style & wxMAXIMIZE_BOX)
 672     msflags |= WS_MAXIMIZEBOX;
 673   if (style & wxTHICK_FRAME)
 674     msflags |= WS_THICKFRAME;
 675   if (style & wxSYSTEM_MENU)
 676     msflags |= WS_SYSMENU;
 677   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 678     msflags |= WS_MINIMIZE;
 679   if (style & wxMAXIMIZE)
 680     msflags |= WS_MAXIMIZE;
 681   if (style & wxCAPTION)
 682     msflags |= WS_CAPTION;
 683
 684   mcs.style = msflags;
 685
 686   mcs.lParam = 0;
 687
 688   DWORD Return = SendMessage(GetWinHwnd(parent->GetClientWindow()),
 689                              WM_MDICREATE, 0, (LONG)(LPSTR)&mcs);
 690
 691   //handle = (HWND)LOWORD(Return);
 692   // Must be the DWORRD for WIN32. And in 16 bits, HIWORD=0 (says Microsoft)
 693   m_hWnd = (WXHWND)Return;
 694
 695   wxWndHook = NULL;
 696   wxAssociateWinWithHandle((HWND) GetHWND(), this);
 697
 698   // VZ: what's this? an act of piracy?
 699   //SetWindowLong(GetHwnd(), 0, (long)this);
 700
 701   wxModelessWindows.Append(this);
 702   return TRUE;
 703 }
 704
 705 wxMDIChildFrame::~wxMDIChildFrame()
 706 {
 707     MSWDestroyWindow();
 708 }
 709
 710 // Set the client size (i.e. leave the calculation of borders etc.
 711 // to wxWindows)
 712 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 713 {
 714   HWND hWnd = GetHwnd();
 715
 716   RECT rect;
 717   ::GetClientRect(hWnd, &rect);
 718
 719   RECT rect2;
 720   GetWindowRect(hWnd, &rect2);
 721
 722   // Find the difference between the entire window (title bar and all)
 723   // and the client area; add this to the new client size to move the
 724   // window
 725   int actual_width = rect2.right - rect2.left - rect.right + width;
 726   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 727
 728   if (GetStatusBar() && GetStatusBar()->IsShown())
 729   {
 730     int sx, sy;
 731     GetStatusBar()->GetSize(&sx, &sy);
 732     actual_height += sy;
 733   }
 734
 735   POINT point;
 736   point.x = rect2.left;
 737   point.y = rect2.top;
 738
 739   // If there's an MDI parent, must subtract the parent's top left corner
 740   // since MoveWindow moves relative to the parent
 741   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 742   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 743
 744   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)TRUE);
 745
 746   wxSizeEvent event(wxSize(width, height), m_windowId);
 747   event.SetEventObject( this );
 748   GetEventHandler()->ProcessEvent(event);
 749 }
 750
 751 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 752 {
 753   RECT rect;
 754   GetWindowRect(GetHwnd(), &rect);
 755   POINT point;
 756   point.x = rect.left;
 757   point.y = rect.top;
 758
 759   // Since we now have the absolute screen coords,
 760   // if there's a parent we must subtract its top left corner
 761   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 762   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 763
 764   *x = point.x;
 765   *y = point.y;
 766 }
 767
 768 void wxMDIChildFrame::InternalSetMenuBar()
 769 {
 770     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 771
 772     // HMENU subMenu = GetSubMenu((HMENU)parent->GetWindowMenu(), 0);
 773     HMENU subMenu = (HMENU) 0;
 774     if (parent->GetWindowMenu())
 775         subMenu = (HMENU) parent->GetWindowMenu()->GetHMenu();
 776
 777     InsertWindowMenu(parent->GetClientWindow(), m_hMenu, subMenu);
 778
 779     parent->m_parentFrameActive = FALSE;
 780 }
 781
 782 // ---------------------------------------------------------------------------
 783 // MDI operations
 784 // ---------------------------------------------------------------------------
 785
 786 void wxMDIChildFrame::Maximize(bool maximize)
 787 {
 788     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 789     if ( parent && parent->GetClientWindow() )
 790     {
 791         ::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 792                       maximize ? WM_MDIMAXIMIZE : WM_MDIRESTORE,
 793                       (WPARAM)GetHwnd(), 0);
 794     }
 795 }
 796
 797 void wxMDIChildFrame::Restore()
 798 {
 799     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 800     if ( parent && parent->GetClientWindow() )
 801     {
 802         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIRESTORE,
 803                       (WPARAM) GetHwnd(), 0);
 804     }
 805 }
 806
 807 void wxMDIChildFrame::Activate()
 808 {
 809     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 810     if ( parent && parent->GetClientWindow() )
 811     {
 812         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIACTIVATE,
 813                       (WPARAM) GetHwnd(), 0);
 814     }
 815 }
 816
 817 // ---------------------------------------------------------------------------
 818 // MDI window proc and message handlers
 819 // ---------------------------------------------------------------------------
 820
 821 long wxMDIChildFrame::MSWWindowProc(WXUINT message,
 822                                     WXWPARAM wParam,
 823                                     WXLPARAM lParam)
 824 {
 825     long rc = 0;
 826     bool processed = FALSE;
 827
 828     switch ( message )
 829     {
 830         case WM_COMMAND:
 831             {
 832                 WORD id, cmd;
 833                 WXHWND hwnd;
 834                 UnpackCommand((WXWPARAM)wParam, (WXLPARAM)lParam,
 835                               &id, &hwnd, &cmd);
 836
 837                 processed = HandleCommand(id, cmd, (WXHWND)hwnd);
 838             }
 839             break;
 840
 841         case WM_GETMINMAXINFO:
 842             // let the default window proc calculate the size of MDI children
 843             // frames because it is based on the size of the MDI client window,
 844             // not on the values specified in wxWindow m_min/max variables
 845             return MSWDefWindowProc(message, wParam, lParam);
 846
 847         case WM_MDIACTIVATE:
 848             {
 849                 WXWORD act;
 850                 WXHWND hwndAct, hwndDeact;
 851                 UnpackMDIActivate(wParam, lParam, &act, &hwndAct, &hwndDeact);
 852
 853                 processed = HandleMDIActivate(act, hwndAct, hwndDeact);
 854             }
 855             // fall through
 856
 857         case WM_MOVE:
 858             // must pass WM_MOVE to DefMDIChildProc() to recalculate MDI client
 859             // scrollbars if necessary
 860
 861             // fall through
 862
 863         case WM_SIZE:
 864             // must pass WM_SIZE to DefMDIChildProc(), otherwise many weird
 865             // things happen
 866             MSWDefWindowProc(message, wParam, lParam);
 867             break;
 868
 869         case WM_SYSCOMMAND:
 870             // DefMDIChildProc handles SC_{NEXT/PREV}WINDOW here, so pass it
 871             // the message (the base class version does not)
 872             return MSWDefWindowProc(message, wParam, lParam);
 873
 874         case WM_WINDOWPOSCHANGING:
 875             processed = HandleWindowPosChanging((LPWINDOWPOS)lParam);
 876             break;
 877     }
 878
 879     if ( !processed )
 880         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 881
 882     return rc;
 883 }
 884
 885 bool wxMDIChildFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 886 {
 887     // In case it's e.g. a toolbar.
 888     if ( hwnd )
 889     {
 890         wxWindow *win = wxFindWinFromHandle(hwnd);
 891         if (win)
 892             return win->MSWCommand(cmd, id);
 893     }
 894
 895     if (wxCurrentPopupMenu)
 896     {
 897         wxMenu *popupMenu = wxCurrentPopupMenu;
 898         wxCurrentPopupMenu = NULL;
 899         if (popupMenu->MSWCommand(cmd, id))
 900             return TRUE;
 901     }
 902
 903     if (GetMenuBar() && GetMenuBar()->FindItem(id))
 904     {
 905         ProcessCommand(id);
 906         return TRUE;
 907     }
 908     else
 909         return FALSE;
 910
 911     return TRUE;
 912 }
 913
 914 bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
 915                                         WXHWND hwndAct,
 916                                         WXHWND hwndDeact)
 917 {
 918     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 919
 920     HMENU menuToSet = 0;
 921
 922     bool activated;
 923
 924     if ( m_hWnd == hwndAct )
 925     {
 926         activated = TRUE;
 927         parent->m_currentChild = this;
 928
 929         HMENU child_menu = (HMENU)GetWinMenu();
 930         if ( child_menu )
 931         {
 932             parent->m_parentFrameActive = FALSE;
 933
 934             menuToSet = child_menu;
 935         }
 936     }
 937     else if ( m_hWnd == hwndDeact )
 938     {
 939         wxASSERT_MSG( parent->m_currentChild == this,
 940                       wxT("can't deactivate MDI child which wasn't active!") );
 941
 942         activated = FALSE;
 943         parent->m_currentChild = NULL;
 944
 945         HMENU parent_menu = (HMENU)parent->GetWinMenu();
 946         if ( parent_menu )
 947         {
 948             parent->m_parentFrameActive = TRUE;
 949
 950             menuToSet = parent_menu;
 951         }
 952     }
 953     else
 954     {
 955         // we have nothing to do with it
 956         return FALSE;
 957     }
 958
 959     if ( menuToSet )
 960     {
 961         HMENU subMenu = (HMENU) 0;
 962         if (parent->GetWindowMenu())
 963             subMenu = (HMENU) parent->GetWindowMenu()->GetHMenu();
 964
 965         MDISetMenu(parent->GetClientWindow(), menuToSet, subMenu);
 966     }
 967
 968     wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
 969     event.SetEventObject( this );
 970
 971     return GetEventHandler()->ProcessEvent(event);
 972 }
 973
 974 bool wxMDIChildFrame::HandleWindowPosChanging(void *pos)
 975 {
 976     WINDOWPOS *lpPos = (WINDOWPOS *)pos;
 977 #if defined(__WIN95__)
 978     if (!(lpPos->flags & SWP_NOSIZE))
 979     {
 980         RECT rectClient;
 981         DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
 982         DWORD dwStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 983         if (ResetWindowStyle((void *) & rectClient) && (dwStyle & WS_MAXIMIZE))
 984         {
 985             ::AdjustWindowRectEx(&rectClient, dwStyle, FALSE, dwExStyle);
 986             lpPos->x = rectClient.left;
 987             lpPos->y = rectClient.top;
 988             lpPos->cx = rectClient.right - rectClient.left;
 989             lpPos->cy = rectClient.bottom - rectClient.top;
 990         }
 991         wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
 992         if (pFrameWnd && pFrameWnd->GetToolBar() && pFrameWnd->GetToolBar()->IsShown())
 993         {
 994             pFrameWnd->GetToolBar()->Refresh();
 995         }
 996     }
 997 #endif // Win95
 998
 999     return FALSE;
1000 }
1001
1002 // ---------------------------------------------------------------------------
1003 // MDI specific message translation/preprocessing
1004 // ---------------------------------------------------------------------------
1005
1006 long wxMDIChildFrame::MSWDefWindowProc(WXUINT message, WXUINT wParam, WXLPARAM lParam)
1007 {
1008     return DefMDIChildProc(GetHwnd(),
1009                            (UINT)message, (WPARAM)wParam, (LPARAM)lParam);
1010 }
1011
1012 bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
1013 {
1014     return m_acceleratorTable.Translate(GetParent(), msg);
1015 }
1016
1017 // ---------------------------------------------------------------------------
1018 // misc
1019 // ---------------------------------------------------------------------------
1020
1021 void wxMDIChildFrame::MSWDestroyWindow()
1022 {
1023     MSWDetachWindowMenu();
1024     invalidHandle = GetHwnd();
1025
1026     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
1027
1028     // Must make sure this handle is invalidated (set to NULL) since all sorts
1029     // of things could happen after the child client is destroyed, but before
1030     // the wxFrame is destroyed.
1031
1032     HWND oldHandle = (HWND)GetHWND();
1033     SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIDESTROY,
1034                 (WPARAM)oldHandle, 0);
1035
1036     if (parent->GetActiveChild() == (wxMDIChildFrame*) NULL)
1037         ResetWindowStyle((void*) NULL);
1038
1039     invalidHandle = 0;
1040
1041     if (m_hMenu)
1042     {
1043         ::DestroyMenu((HMENU) m_hMenu);
1044         m_hMenu = 0;
1045     }
1046     wxRemoveHandleAssociation(this);
1047     m_hWnd = 0;
1048 }
1049
1050 // Change the client window's extended style so we don't get a client edge
1051 // style when a child is maximised (a double border looks silly.)
1052 bool wxMDIChildFrame::ResetWindowStyle(void *vrect)
1053 {
1054 #if defined(__WIN95__)
1055     RECT *rect = (RECT *)vrect;
1056     wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
1057     wxMDIChildFrame* pChild = pFrameWnd->GetActiveChild();
1058     if (!pChild || (pChild == this))
1059     {
1060         DWORD dwStyle = ::GetWindowLong(GetWinHwnd(pFrameWnd->GetClientWindow()), GWL_EXSTYLE);
1061         DWORD dwThisStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1062         DWORD dwNewStyle = dwStyle;
1063         if (pChild != NULL && (dwThisStyle & WS_MAXIMIZE))
1064             dwNewStyle &= ~(WS_EX_CLIENTEDGE);
1065         else
1066             dwNewStyle |= WS_EX_CLIENTEDGE;
1067
1068         if (dwStyle != dwNewStyle)
1069         {
1070             HWND hwnd = GetWinHwnd(pFrameWnd->GetClientWindow());
1071             ::RedrawWindow(hwnd, NULL, NULL, RDW_INVALIDATE | RDW_ALLCHILDREN);
1072             ::SetWindowLong(hwnd, GWL_EXSTYLE, dwNewStyle);
1073             ::SetWindowPos(hwnd, NULL, 0, 0, 0, 0,
1074                            SWP_FRAMECHANGED | SWP_NOACTIVATE |
1075                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
1076                            SWP_NOCOPYBITS);
1077             if (rect)
1078                 ::GetClientRect(hwnd, rect);
1079
1080             return TRUE;
1081         }
1082     }
1083 #endif // Win95
1084
1085     return FALSE;
1086 }
1087
1088 // ===========================================================================
1089 // wxMDIClientWindow: the window of predefined (by Windows) class which
1090 // contains the child frames
1091 // ===========================================================================
1092
1093 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
1094 {
1095     m_backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE);
1096
1097     CLIENTCREATESTRUCT ccs;
1098     m_windowStyle = style;
1099     m_parent = parent;
1100
1101     ccs.hWindowMenu = (HMENU) 0;
1102     if (parent->GetWindowMenu())
1103         ccs.hWindowMenu = (HMENU) parent->GetWindowMenu()->GetHMenu();
1104     ccs.idFirstChild = wxFIRST_MDI_CHILD;
1105
1106     DWORD msStyle = WS_VISIBLE | WS_CHILD | WS_CLIPCHILDREN;
1107     if ( style & wxHSCROLL )
1108         msStyle |= WS_HSCROLL;
1109     if ( style & wxVSCROLL )
1110         msStyle |= WS_VSCROLL;
1111
1112 #if defined(__WIN95__)
1113     DWORD exStyle = WS_EX_CLIENTEDGE;
1114 #else
1115     DWORD exStyle = 0;
1116 #endif
1117
1118     wxWndHook = this;
1119     m_hWnd = (WXHWND)::CreateWindowEx
1120                        (
1121                         exStyle,
1122                         wxT("MDICLIENT"),
1123                         NULL,
1124                         msStyle,
1125                         0, 0, 0, 0,
1126                         GetWinHwnd(parent),
1127                         NULL,
1128                         wxGetInstance(),
1129                         (LPSTR)(LPCLIENTCREATESTRUCT)&ccs);
1130     if ( !m_hWnd )
1131     {
1132         wxLogLastError("CreateWindowEx(MDI client)");
1133
1134         return FALSE;
1135     }
1136
1137     SubclassWin(m_hWnd);
1138     wxWndHook = NULL;
1139
1140     return TRUE;
1141 }
1142
1143 // Explicitly call default scroll behaviour
1144 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
1145 {
1146     // Note: for client windows, the scroll position is not set in
1147     // WM_HSCROLL, WM_VSCROLL, so we can't easily determine what
1148     // scroll position we're at.
1149     // This makes it hard to paint patterns or bitmaps in the background,
1150     // and have the client area scrollable as well.
1151
1152     if ( event.GetOrientation() == wxHORIZONTAL )
1153         m_scrollX = event.GetPosition(); // Always returns zero!
1154     else
1155         m_scrollY = event.GetPosition(); // Always returns zero!
1156
1157     event.Skip();
1158 }
1159
1160 void wxMDIClientWindow::DoSetSize(int x, int y, int width, int height, int sizeFlags)
1161 {
1162     // Try to fix a problem whereby if you show an MDI child frame, then reposition the
1163     // client area, you can end up with a non-refreshed portion in the client window
1164     // (see OGL studio sample). So check if the position is changed and if so,
1165     // redraw the MDI child frames.
1166
1167     wxPoint oldPos = GetPosition();
1168
1169     wxWindow::DoSetSize(x, y, width, height, sizeFlags);
1170
1171     wxPoint newPos = GetPosition();
1172
1173     if ((newPos.x != oldPos.x) || (newPos.y != oldPos.y))
1174     {
1175         if (GetParent())
1176         {
1177             wxNode* node = GetParent()->GetChildren().First();
1178             while (node)
1179             {
1180                 wxWindow* child = (wxWindow*) node->Data();
1181                 if (child->IsKindOf(CLASSINFO(wxMDIChildFrame)))
1182                 {
1183                     HWND hWnd = (HWND) child->GetHWND();
1184                    ::RedrawWindow(hWnd, NULL, NULL, RDW_FRAME|RDW_ALLCHILDREN|RDW_INVALIDATE );
1185                 }
1186                 node = node->Next();
1187             }
1188         }
1189     }
1190 }
1191
1192 // ---------------------------------------------------------------------------
1193 // non member functions
1194 // ---------------------------------------------------------------------------
1195
1196 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow)
1197 {
1198     ::SendMessage(GetWinHwnd(win), WM_MDISETMENU,
1199 #ifdef __WIN32__
1200                   (WPARAM)hmenuFrame, (LPARAM)hmenuWindow);
1201 #else
1202                   0, MAKELPARAM(hmenuFrame, hmenuWindow));
1203 #endif
1204
1205     // update menu bar of the parent window
1206     wxWindow *parent = win->GetParent();
1207     wxCHECK_RET( parent, wxT("MDI client without parent frame? weird...") );
1208
1209     ::DrawMenuBar(GetWinHwnd(parent));
1210 }
1211
1212 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu)
1213 {
1214     // Try to insert Window menu in front of Help, otherwise append it.
1215     HMENU hmenu = (HMENU)menu;
1216
1217     if (subMenu)
1218     {
1219     int N = GetMenuItemCount(hmenu);
1220     bool success = FALSE;
1221     for ( int i = 0; i < N; i++ )
1222     {
1223         wxChar buf[256];
1224         int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1225         if ( chars == 0 )
1226         {
1227             wxLogLastError(wxT("GetMenuString"));
1228
1229             continue;
1230         }
1231
1232         if ( wxStripMenuCodes(wxString(buf)).IsSameAs(wxT("Help")) )
1233         {
1234             success = TRUE;
1235             ::InsertMenu(hmenu, i, MF_BYPOSITION | MF_POPUP | MF_STRING,
1236                          (UINT)subMenu, wxT("&Window"));
1237             break;
1238         }
1239     }
1240
1241     if ( !success )
1242     {
1243         ::AppendMenu(hmenu, MF_POPUP, (UINT)subMenu, wxT("&Window"));
1244     }
1245     }
1246
1247     MDISetMenu(win, hmenu, subMenu);
1248 }
1249
1250 static void RemoveWindowMenu(wxWindow *win, WXHMENU menu)
1251 {
1252     // Try to insert Window menu in front of Help, otherwise append it.
1253     HMENU hmenu = (HMENU)menu;
1254     int N = GetMenuItemCount(hmenu);
1255     bool success = FALSE;
1256     for ( int i = 0; i < N; i++ )
1257     {
1258         wxChar buf[256];
1259         int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1260         if ( chars == 0 )
1261         {
1262             wxLogLastError(wxT("GetMenuString"));
1263
1264             continue;
1265         }
1266
1267         if ( wxStripMenuCodes(wxString(buf)).IsSameAs(wxT("Window")) )
1268         {
1269             success = TRUE;
1270             ::RemoveMenu(hmenu, i, MF_BYPOSITION);
1271             break;
1272         }
1273     }
1274
1275     // Does passing 0 for the window menu really work with WM_MDISETMENU?
1276     MDISetMenu(win, hmenu, 0);
1277 }
1278
1279 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
1280                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact)
1281 {
1282 #ifdef __WIN32__
1283     *activate = TRUE;
1284     *hwndAct = (WXHWND)lParam;
1285     *hwndDeact = (WXHWND)wParam;
1286 #else // Win16
1287     *activate = (WXWORD)wParam;
1288     *hwndAct = (WXHWND)LOWORD(lParam);
1289     *hwndDeact = (WXHWND)HIWORD(lParam);
1290 #endif // Win32/Win16
1291 }