src/generic/mdig.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/mdig.cpp
   3 // Purpose:     Generic MDI (Multiple Document Interface) classes
   4 // Author:      Hans Van Leemputten
   5 // Modified by: 2008-10-31 Vadim Zeitlin: derive from the base classes
   6 // Created:     29/07/2002
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2002 Hans Van Leemputten
   9 //              (c) 2008 Vadim Zeitlin
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 // ===========================================================================
  14 // declarations
  15 // ===========================================================================
  16
  17 // ---------------------------------------------------------------------------
  18 // headers
  19 // ---------------------------------------------------------------------------
  20
  21 // For compilers that support precompilation, includes "wx.h".
  22 #include "wx/wxprec.h"
  23
  24 #ifdef __BORLANDC__
  25     #pragma hdrstop
  26 #endif
  27
  28 #if wxUSE_MDI
  29
  30 #ifndef WX_PRECOMP
  31     #include "wx/menu.h"
  32     #include "wx/intl.h"
  33     #include "wx/log.h"
  34 #endif //WX_PRECOMP
  35
  36 #include "wx/mdi.h"
  37 #include "wx/generic/mdig.h"
  38 #include "wx/notebook.h"
  39 #include "wx/scopeguard.h"
  40
  41 #include "wx/stockitem.h"
  42
  43 enum MDI_MENU_ID
  44 {
  45     wxWINDOWCLOSE = 4001,
  46     wxWINDOWCLOSEALL,
  47     wxWINDOWNEXT,
  48     wxWINDOWPREV
  49 };
  50
  51 //-----------------------------------------------------------------------------
  52 // wxGenericMDIParentFrame
  53 //-----------------------------------------------------------------------------
  54
  55 IMPLEMENT_DYNAMIC_CLASS(wxGenericMDIParentFrame, wxFrame)
  56
  57 BEGIN_EVENT_TABLE(wxGenericMDIParentFrame, wxFrame)
  58     EVT_CLOSE(wxGenericMDIParentFrame::OnClose)
  59 #if wxUSE_MENUS
  60     EVT_MENU(wxID_ANY, wxGenericMDIParentFrame::OnWindowMenu)
  61 #endif
  62 END_EVENT_TABLE()
  63
  64 void wxGenericMDIParentFrame::Init()
  65 {
  66 #if wxUSE_MENUS
  67     m_pMyMenuBar = NULL;
  68 #endif // wxUSE_MENUS
  69 }
  70
  71 wxGenericMDIParentFrame::~wxGenericMDIParentFrame()
  72 {
  73     // Make sure the client window is destructed before the menu bars are!
  74     wxDELETE(m_clientWindow);
  75
  76 #if wxUSE_MENUS
  77     wxDELETE(m_pMyMenuBar);
  78
  79     RemoveWindowMenu(GetMenuBar());
  80 #endif // wxUSE_MENUS
  81 }
  82
  83 bool wxGenericMDIParentFrame::Create(wxWindow *parent,
  84                               wxWindowID id,
  85                               const wxString& title,
  86                               const wxPoint& pos,
  87                               const wxSize& size,
  88                               long style,
  89                               const wxString& name)
  90 {
  91     // this style can be used to prevent a window from having the standard MDI
  92     // "Window" menu
  93     if ( !(style & wxFRAME_NO_WINDOW_MENU) )
  94     {
  95 #if wxUSE_MENUS
  96         m_windowMenu = new wxMenu;
  97
  98         m_windowMenu->Append(wxWINDOWCLOSE,    _("Cl&ose"));
  99         m_windowMenu->Append(wxWINDOWCLOSEALL, _("Close All"));
 100         m_windowMenu->AppendSeparator();
 101         m_windowMenu->Append(wxWINDOWNEXT,     _("&Next"));
 102         m_windowMenu->Append(wxWINDOWPREV,     _("&Previous"));
 103 #endif // wxUSE_MENUS
 104     }
 105
 106     // the scrolling styles don't make sense neither for us nor for our client
 107     // window (to which they're supposed to apply)
 108     style &= ~(wxHSCROLL | wxVSCROLL);
 109
 110     if ( !wxFrame::Create( parent, id, title, pos, size, style, name ) )
 111         return false;
 112
 113     wxGenericMDIClientWindow * const client = OnCreateGenericClient();
 114     if ( !client->CreateGenericClient(this) )
 115         return false;
 116
 117     m_clientWindow = client;
 118
 119     return true;
 120 }
 121
 122 wxGenericMDIClientWindow *wxGenericMDIParentFrame::OnCreateGenericClient()
 123 {
 124     return new wxGenericMDIClientWindow;
 125 }
 126
 127 bool wxGenericMDIParentFrame::CloseAll()
 128 {
 129     wxGenericMDIClientWindow * const client = GetGenericClientWindow();
 130     if ( !client )
 131         return true; // none of the windows left
 132
 133     wxBookCtrlBase * const book = client->GetBookCtrl();
 134     while ( book->GetPageCount() )
 135     {
 136         wxGenericMDIChildFrame * const child = client->GetChild(0);
 137         if ( !child->Close() )
 138         {
 139             // it refused to close, don't close the remaining ones neither
 140             return false;
 141         }
 142     }
 143
 144     return true;
 145 }
 146
 147 #if wxUSE_MENUS
 148 void wxGenericMDIParentFrame::SetWindowMenu(wxMenu* pMenu)
 149 {
 150     // Replace the window menu from the currently loaded menu bar.
 151     wxMenuBar *pMenuBar = GetMenuBar();
 152
 153     if (m_windowMenu)
 154     {
 155         RemoveWindowMenu(pMenuBar);
 156
 157         wxDELETE(m_windowMenu);
 158     }
 159
 160     if (pMenu)
 161     {
 162         m_windowMenu = pMenu;
 163
 164         AddWindowMenu(pMenuBar);
 165     }
 166 }
 167
 168 void wxGenericMDIParentFrame::SetMenuBar(wxMenuBar *pMenuBar)
 169 {
 170     // Remove the Window menu from the old menu bar
 171     RemoveWindowMenu(GetMenuBar());
 172     // Add the Window menu to the new menu bar.
 173     AddWindowMenu(pMenuBar);
 174
 175     wxFrame::SetMenuBar(pMenuBar);
 176 }
 177 #endif // wxUSE_MENUS
 178
 179 void wxGenericMDIParentFrame::WXSetChildMenuBar(wxGenericMDIChildFrame *pChild)
 180 {
 181 #if wxUSE_MENUS
 182     if (pChild  == NULL)
 183     {
 184         // No Child, set Our menu bar back.
 185         SetMenuBar(m_pMyMenuBar);
 186
 187         // Make sure we know our menu bar is in use
 188         m_pMyMenuBar = NULL;
 189     }
 190     else
 191     {
 192         if (pChild->GetMenuBar() == NULL)
 193             return;
 194
 195         // Do we need to save the current bar?
 196         if (m_pMyMenuBar == NULL)
 197             m_pMyMenuBar = GetMenuBar();
 198
 199         SetMenuBar(pChild->GetMenuBar());
 200     }
 201 #endif // wxUSE_MENUS
 202 }
 203
 204 wxGenericMDIClientWindow *
 205 wxGenericMDIParentFrame::GetGenericClientWindow() const
 206 {
 207     return static_cast<wxGenericMDIClientWindow *>(m_clientWindow);
 208 }
 209
 210 wxBookCtrlBase *wxGenericMDIParentFrame::GetBookCtrl() const
 211 {
 212     wxGenericMDIClientWindow * const client = GetGenericClientWindow();
 213     return client ? client->GetBookCtrl() : NULL;
 214 }
 215
 216 void wxGenericMDIParentFrame::AdvanceActive(bool forward)
 217 {
 218     wxBookCtrlBase * const book = GetBookCtrl();
 219     if ( book )
 220         book->AdvanceSelection(forward);
 221 }
 222
 223 void wxGenericMDIParentFrame::WXUpdateChildTitle(wxGenericMDIChildFrame *child)
 224 {
 225     wxGenericMDIClientWindow * const client = GetGenericClientWindow();
 226
 227     const int pos = client->FindChild(child);
 228     if ( pos == wxNOT_FOUND )
 229         return;
 230
 231     client->GetBookCtrl()->SetPageText(pos, child->GetTitle());
 232 }
 233
 234 void wxGenericMDIParentFrame::WXActivateChild(wxGenericMDIChildFrame *child)
 235 {
 236     wxGenericMDIClientWindow * const client = GetGenericClientWindow();
 237
 238     const int pos = client->FindChild(child);
 239     if ( pos == wxNOT_FOUND )
 240         return;
 241
 242     client->GetBookCtrl()->SetSelection(pos);
 243 }
 244
 245 void wxGenericMDIParentFrame::WXRemoveChild(wxGenericMDIChildFrame *child)
 246 {
 247     const bool removingActive = WXIsActiveChild(child);
 248     if ( removingActive )
 249     {
 250         SetActiveChild(NULL);
 251         WXSetChildMenuBar(NULL);
 252     }
 253
 254     wxGenericMDIClientWindow * const client = GetGenericClientWindow();
 255     wxCHECK_RET( client, "should have client window" );
 256
 257     wxBookCtrlBase * const book = client->GetBookCtrl();
 258
 259     // Remove page if still there
 260     int pos = client->FindChild(child);
 261     if ( pos != wxNOT_FOUND )
 262     {
 263         if ( book->RemovePage(pos) )
 264             book->Refresh();
 265     }
 266
 267     if ( removingActive )
 268     {
 269         // Set the new selection to a remaining page
 270         const size_t count = book->GetPageCount();
 271         if ( count > (size_t)pos )
 272         {
 273             book->SetSelection(pos);
 274         }
 275         else
 276         {
 277             if ( count > 0 )
 278                 book->SetSelection(count - 1);
 279         }
 280     }
 281 }
 282
 283 bool
 284 wxGenericMDIParentFrame::WXIsActiveChild(wxGenericMDIChildFrame *child) const
 285 {
 286     return static_cast<wxMDIChildFrameBase *>(GetActiveChild()) == child;
 287 }
 288
 289 #if wxUSE_MENUS
 290 void wxGenericMDIParentFrame::RemoveWindowMenu(wxMenuBar *pMenuBar)
 291 {
 292     if (pMenuBar && m_windowMenu)
 293     {
 294         // Remove old window menu
 295         int pos = pMenuBar->FindMenu(_("&Window"));
 296         if (pos != wxNOT_FOUND)
 297         {
 298             wxASSERT(m_windowMenu == pMenuBar->GetMenu(pos)); // DBG:: We're going to delete the wrong menu!!!
 299             pMenuBar->Remove(pos);
 300         }
 301     }
 302 }
 303
 304 void wxGenericMDIParentFrame::AddWindowMenu(wxMenuBar *pMenuBar)
 305 {
 306     if (pMenuBar && m_windowMenu)
 307     {
 308         int pos = pMenuBar->FindMenu(wxGetStockLabel(wxID_HELP,false));
 309         if (pos == wxNOT_FOUND)
 310         {
 311             pMenuBar->Append(m_windowMenu, _("&Window"));
 312         }
 313         else
 314         {
 315             pMenuBar->Insert(pos, m_windowMenu, _("&Window"));
 316         }
 317     }
 318 }
 319
 320 void wxGenericMDIParentFrame::OnWindowMenu(wxCommandEvent &event)
 321 {
 322     switch ( event.GetId() )
 323     {
 324         case wxWINDOWCLOSE:
 325             if ( m_currentChild )
 326                 m_currentChild->Close();
 327             break;
 328
 329         case wxWINDOWCLOSEALL:
 330             CloseAll();
 331             break;
 332
 333         case wxWINDOWNEXT:
 334             ActivateNext();
 335             break;
 336
 337         case wxWINDOWPREV:
 338             ActivatePrevious();
 339             break;
 340
 341         default:
 342             event.Skip();
 343     }
 344 }
 345 #endif // wxUSE_MENUS
 346
 347 void wxGenericMDIParentFrame::OnClose(wxCloseEvent& event)
 348 {
 349     if ( !CloseAll() )
 350         event.Veto();
 351     else
 352         event.Skip();
 353 }
 354
 355 bool wxGenericMDIParentFrame::ProcessEvent(wxEvent& event)
 356 {
 357     if ( m_currentChild )
 358     {
 359         // the menu events should be given to the child as we show its menu bar
 360         // as our own
 361         const wxEventType eventType = event.GetEventType();
 362         if ( eventType == wxEVT_COMMAND_MENU_SELECTED ||
 363              eventType == wxEVT_UPDATE_UI )
 364         {
 365             // set the flag indicating that this event was forwarded to the
 366             // child from the parent and so shouldn't be propagated upwards if
 367             // not processed to avoid infinite loop
 368             m_childHandler = m_currentChild;
 369             wxON_BLOCK_EXIT_NULL(m_childHandler);
 370
 371             if ( m_currentChild->ProcessWindowEvent(event) )
 372                 return true;
 373         }
 374     }
 375
 376     return wxMDIParentFrameBase::ProcessEvent(event);
 377 }
 378
 379 // ----------------------------------------------------------------------------
 380 // wxGenericMDIChildFrame
 381 // ----------------------------------------------------------------------------
 382
 383 IMPLEMENT_DYNAMIC_CLASS(wxGenericMDIChildFrame, wxFrame)
 384
 385 BEGIN_EVENT_TABLE(wxGenericMDIChildFrame, wxFrame)
 386     EVT_MENU_HIGHLIGHT_ALL(wxGenericMDIChildFrame::OnMenuHighlight)
 387
 388     EVT_CLOSE(wxGenericMDIChildFrame::OnClose)
 389 END_EVENT_TABLE()
 390
 391 void wxGenericMDIChildFrame::Init()
 392 {
 393 #if wxUSE_MENUS
 394     m_pMenuBar = NULL;
 395 #endif // wxUSE_MENUS
 396
 397 #if !wxUSE_GENERIC_MDI_AS_NATIVE
 398     m_mdiParentGeneric = NULL;
 399 #endif
 400 }
 401
 402 wxGenericMDIChildFrame::~wxGenericMDIChildFrame()
 403 {
 404     wxGenericMDIParentFrame * const parent = GetGenericMDIParent();
 405
 406     // it could happen that we don't have a valid parent if we hadn't been ever
 407     // really created -- but in this case there is nothing else to do neither
 408     if ( parent )
 409         parent->WXRemoveChild(this);
 410
 411 #if wxUSE_MENUS
 412     delete m_pMenuBar;
 413 #endif // wxUSE_MENUS
 414 }
 415
 416 bool wxGenericMDIChildFrame::Create(wxGenericMDIParentFrame *parent,
 417                                     wxWindowID id,
 418                                     const wxString& title,
 419                                     const wxPoint& WXUNUSED(pos),
 420                                     const wxSize& size,
 421                                     long WXUNUSED(style),
 422                                     const wxString& name)
 423 {
 424     // unfortunately we can't use the base class m_mdiParent field unless
 425     // wxGenericMDIParentFrame is wxMDIParentFrame
 426 #if wxUSE_GENERIC_MDI_AS_NATIVE
 427     m_mdiParent = parent;
 428 #else // generic != native
 429     // leave m_mdiParent NULL, we don't have it
 430     m_mdiParentGeneric = parent;
 431 #endif
 432
 433     wxBookCtrlBase * const book = parent->GetBookCtrl();
 434
 435     wxASSERT_MSG( book, "Missing MDI client window." );
 436
 437     // note that we ignore the styles, none of the usual TLW styles apply to
 438     // this (child) window
 439     if ( !wxWindow::Create(book, id, wxDefaultPosition, size, 0, name) )
 440         return false;
 441
 442     m_title = title;
 443     book->AddPage(this, title, true);
 444
 445     return true;
 446 }
 447
 448 #if wxUSE_MENUS
 449 void wxGenericMDIChildFrame::SetMenuBar( wxMenuBar *menu_bar )
 450 {
 451     wxMenuBar *pOldMenuBar = m_pMenuBar;
 452     m_pMenuBar = menu_bar;
 453
 454     if (m_pMenuBar)
 455     {
 456         wxGenericMDIParentFrame *parent = GetGenericMDIParent();
 457
 458         if ( parent )
 459         {
 460             m_pMenuBar->SetParent(parent);
 461
 462             if ( parent->WXIsActiveChild(this) )
 463             {
 464                 // Replace current menu bars
 465                 if (pOldMenuBar)
 466                     parent->WXSetChildMenuBar(NULL);
 467                 parent->WXSetChildMenuBar(this);
 468             }
 469         }
 470     }
 471 }
 472
 473 wxMenuBar *wxGenericMDIChildFrame::GetMenuBar() const
 474 {
 475     return m_pMenuBar;
 476 }
 477 #endif // wxUSE_MENUS
 478
 479 void wxGenericMDIChildFrame::SetTitle(const wxString& title)
 480 {
 481     m_title = title;
 482
 483     wxGenericMDIParentFrame * const parent = GetGenericMDIParent();
 484     if ( parent )
 485         parent->WXUpdateChildTitle(this);
 486     //else: it's ok, we might be not created yet
 487 }
 488
 489 void wxGenericMDIChildFrame::Activate()
 490 {
 491     wxGenericMDIParentFrame * const parent = GetGenericMDIParent();
 492
 493     wxCHECK_RET( parent, "can't activate MDI child without parent" );
 494     parent->WXActivateChild(this);
 495 }
 496
 497 void wxGenericMDIChildFrame::OnMenuHighlight(wxMenuEvent& event)
 498 {
 499     wxGenericMDIParentFrame * const parent = GetGenericMDIParent();
 500     if ( parent)
 501     {
 502         // we don't have any help text for this item,
 503         // but may be the MDI frame does?
 504         parent->OnMenuHighlight(event);
 505     }
 506 }
 507
 508 void wxGenericMDIChildFrame::OnClose(wxCloseEvent& WXUNUSED(event))
 509 {
 510     // we're not a TLW so don't delay the destruction of this window
 511     delete this;
 512 }
 513
 514 bool wxGenericMDIChildFrame::TryAfter(wxEvent& event)
 515 {
 516     // we shouldn't propagate the event to the parent if we received it from it
 517     // in the first place
 518     wxGenericMDIParentFrame * const parent = GetGenericMDIParent();
 519     if ( parent && parent->WXIsInsideChildHandler(this) )
 520         return false;
 521
 522     return wxTDIChildFrame::TryAfter(event);
 523 }
 524
 525 // ----------------------------------------------------------------------------
 526 // wxGenericMDIClientWindow
 527 // ----------------------------------------------------------------------------
 528
 529 IMPLEMENT_DYNAMIC_CLASS(wxGenericMDIClientWindow, wxWindow)
 530
 531 bool
 532 wxGenericMDIClientWindow::CreateGenericClient(wxWindow *parent)
 533 {
 534     if ( !wxWindow::Create(parent, wxID_ANY) )
 535         return false;
 536
 537     m_notebook = new wxNotebook(this, wxID_ANY);
 538     m_notebook->Connect
 539                 (
 540                     wxEVT_COMMAND_NOTEBOOK_PAGE_CHANGED,
 541                     wxNotebookEventHandler(
 542                         wxGenericMDIClientWindow::OnPageChanged),
 543                     NULL,
 544                     this
 545                 );
 546
 547     // now that we have a notebook to resize, hook up OnSize() too
 548     Connect(wxEVT_SIZE, wxSizeEventHandler(wxGenericMDIClientWindow::OnSize));
 549
 550     return true;
 551 }
 552
 553 wxBookCtrlBase *wxGenericMDIClientWindow::GetBookCtrl() const
 554 {
 555     return m_notebook;
 556 }
 557
 558 wxGenericMDIChildFrame *wxGenericMDIClientWindow::GetChild(size_t pos) const
 559 {
 560     return static_cast<wxGenericMDIChildFrame *>(GetBookCtrl()->GetPage(pos));
 561 }
 562
 563 int wxGenericMDIClientWindow::FindChild(wxGenericMDIChildFrame *child) const
 564 {
 565     wxBookCtrlBase * const book = GetBookCtrl();
 566     const size_t count = book->GetPageCount();
 567     for ( size_t pos = 0; pos < count; pos++ )
 568     {
 569         if ( book->GetPage(pos) == child )
 570             return pos;
 571     }
 572
 573     return wxNOT_FOUND;
 574 }
 575
 576 void wxGenericMDIClientWindow::PageChanged(int oldSelection, int newSelection)
 577 {
 578     // Don't do anything if nothing changed
 579     if (oldSelection == newSelection)
 580         return;
 581
 582     // Again check if we really need to do this...
 583     if (newSelection != -1)
 584     {
 585         wxGenericMDIChildFrame * const child = GetChild(newSelection);
 586
 587         if ( child->GetGenericMDIParent()->WXIsActiveChild(child) )
 588             return;
 589     }
 590
 591     // Notify old active child that it has been deactivated
 592     if (oldSelection != -1)
 593     {
 594         wxGenericMDIChildFrame * const oldChild = GetChild(oldSelection);
 595         if (oldChild)
 596         {
 597             wxActivateEvent event(wxEVT_ACTIVATE, false, oldChild->GetId());
 598             event.SetEventObject( oldChild );
 599             oldChild->GetEventHandler()->ProcessEvent(event);
 600         }
 601     }
 602
 603     // Notify new active child that it has been activated
 604     if (newSelection != -1)
 605     {
 606         wxGenericMDIChildFrame * const activeChild = GetChild(newSelection);
 607         if ( activeChild )
 608         {
 609             wxActivateEvent event(wxEVT_ACTIVATE, true, activeChild->GetId());
 610             event.SetEventObject( activeChild );
 611             activeChild->GetEventHandler()->ProcessEvent(event);
 612
 613             wxGenericMDIParentFrame * const
 614                 parent = activeChild->GetGenericMDIParent();
 615
 616             if ( parent )
 617             {
 618                 // this is a dirty hack as activeChild is not really a
 619                 // wxMDIChildFrame at all but we still want to store it in the
 620                 // base class m_currentChild field and this will work as long
 621                 // as we only use as wxMDIChildFrameBase pointer (which it is)
 622                 parent->SetActiveChild(
 623                     reinterpret_cast<wxMDIChildFrame *>(activeChild));
 624                 parent->WXSetChildMenuBar(activeChild);
 625             }
 626         }
 627     }
 628 }
 629
 630 void wxGenericMDIClientWindow::OnPageChanged(wxBookCtrlEvent& event)
 631 {
 632     PageChanged(event.GetOldSelection(), event.GetSelection());
 633
 634     event.Skip();
 635 }
 636
 637 void wxGenericMDIClientWindow::OnSize(wxSizeEvent& WXUNUSED(event))
 638 {
 639     m_notebook->SetSize(GetClientSize());
 640 }
 641
 642 #endif // wxUSE_MDI
 643