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     if (m_pMyMenuBar)
  78     {
  79         delete m_pMyMenuBar;
  80         m_pMyMenuBar = NULL;
  81     }
  82
  83     RemoveWindowMenu(GetMenuBar());
  84 #endif // wxUSE_MENUS
  85 }
  86
  87 bool wxGenericMDIParentFrame::Create(wxWindow *parent,
  88                               wxWindowID id,
  89                               const wxString& title,
  90                               const wxPoint& pos,
  91                               const wxSize& size,
  92                               long style,
  93                               const wxString& name)
  94 {
  95     // this style can be used to prevent a window from having the standard MDI
  96     // "Window" menu
  97     if ( !(style & wxFRAME_NO_WINDOW_MENU) )
  98     {
  99 #if wxUSE_MENUS
 100         m_windowMenu = new wxMenu;
 101
 102         m_windowMenu->Append(wxWINDOWCLOSE,    _("Cl&ose"));
 103         m_windowMenu->Append(wxWINDOWCLOSEALL, _("Close All"));
 104         m_windowMenu->AppendSeparator();
 105         m_windowMenu->Append(wxWINDOWNEXT,     _("&Next"));
 106         m_windowMenu->Append(wxWINDOWPREV,     _("&Previous"));
 107 #endif // wxUSE_MENUS
 108     }
 109
 110     // the scrolling styles don't make sense neither for us nor for our client
 111     // window (to which they're supposed to apply)
 112     style &= ~(wxHSCROLL | wxVSCROLL);
 113
 114     if ( !wxFrame::Create( parent, id, title, pos, size, style, name ) )
 115         return false;
 116
 117     wxGenericMDIClientWindow * const client = OnCreateGenericClient();
 118     if ( !client->CreateGenericClient(this) )
 119         return false;
 120
 121     m_clientWindow = client;
 122
 123     return true;
 124 }
 125
 126 wxGenericMDIClientWindow *wxGenericMDIParentFrame::OnCreateGenericClient()
 127 {
 128     return new wxGenericMDIClientWindow;
 129 }
 130
 131 bool wxGenericMDIParentFrame::CloseAll()
 132 {
 133     wxGenericMDIClientWindow * const client = GetGenericClientWindow();
 134     if ( !client )
 135         return true; // none of the windows left
 136
 137     wxBookCtrlBase * const book = client->GetBookCtrl();
 138     while ( book->GetPageCount() )
 139     {
 140         wxGenericMDIChildFrame * const child = client->GetChild(0);
 141         if ( !child->Close() )
 142         {
 143             // it refused to close, don't close the remaining ones neither
 144             return false;
 145         }
 146     }
 147
 148     return true;
 149 }
 150
 151 #if wxUSE_MENUS
 152 void wxGenericMDIParentFrame::SetWindowMenu(wxMenu* pMenu)
 153 {
 154     // Replace the window menu from the currently loaded menu bar.
 155     wxMenuBar *pMenuBar = GetMenuBar();
 156
 157     if (m_windowMenu)
 158     {
 159         RemoveWindowMenu(pMenuBar);
 160
 161         wxDELETE(m_windowMenu);
 162     }
 163
 164     if (pMenu)
 165     {
 166         m_windowMenu = pMenu;
 167
 168         AddWindowMenu(pMenuBar);
 169     }
 170 }
 171
 172 void wxGenericMDIParentFrame::SetMenuBar(wxMenuBar *pMenuBar)
 173 {
 174     // Remove the Window menu from the old menu bar
 175     RemoveWindowMenu(GetMenuBar());
 176     // Add the Window menu to the new menu bar.
 177     AddWindowMenu(pMenuBar);
 178
 179     wxFrame::SetMenuBar(pMenuBar);
 180 }
 181 #endif // wxUSE_MENUS
 182
 183 void wxGenericMDIParentFrame::WXSetChildMenuBar(wxGenericMDIChildFrame *pChild)
 184 {
 185 #if wxUSE_MENUS
 186     if (pChild  == NULL)
 187     {
 188         // No Child, set Our menu bar back.
 189         SetMenuBar(m_pMyMenuBar);
 190
 191         // Make sure we know our menu bar is in use
 192         m_pMyMenuBar = NULL;
 193     }
 194     else
 195     {
 196         if (pChild->GetMenuBar() == NULL)
 197             return;
 198
 199         // Do we need to save the current bar?
 200         if (m_pMyMenuBar == NULL)
 201             m_pMyMenuBar = GetMenuBar();
 202
 203         SetMenuBar(pChild->GetMenuBar());
 204     }
 205 #endif // wxUSE_MENUS
 206 }
 207
 208 wxGenericMDIClientWindow *
 209 wxGenericMDIParentFrame::GetGenericClientWindow() const
 210 {
 211     return static_cast<wxGenericMDIClientWindow *>(m_clientWindow);
 212 }
 213
 214 wxBookCtrlBase *wxGenericMDIParentFrame::GetBookCtrl() const
 215 {
 216     wxGenericMDIClientWindow * const client = GetGenericClientWindow();
 217     return client ? client->GetBookCtrl() : NULL;
 218 }
 219
 220 void wxGenericMDIParentFrame::AdvanceActive(bool forward)
 221 {
 222     wxBookCtrlBase * const book = GetBookCtrl();
 223     if ( book )
 224         book->AdvanceSelection(forward);
 225 }
 226
 227 void wxGenericMDIParentFrame::WXUpdateChildTitle(wxGenericMDIChildFrame *child)
 228 {
 229     wxGenericMDIClientWindow * const client = GetGenericClientWindow();
 230
 231     const int pos = client->FindChild(child);
 232     if ( pos == wxNOT_FOUND )
 233         return;
 234
 235     client->GetBookCtrl()->SetPageText(pos, child->GetTitle());
 236 }
 237
 238 void wxGenericMDIParentFrame::WXActivateChild(wxGenericMDIChildFrame *child)
 239 {
 240     wxGenericMDIClientWindow * const client = GetGenericClientWindow();
 241
 242     const int pos = client->FindChild(child);
 243     if ( pos == wxNOT_FOUND )
 244         return;
 245
 246     client->GetBookCtrl()->SetSelection(pos);
 247 }
 248
 249 void wxGenericMDIParentFrame::WXRemoveChild(wxGenericMDIChildFrame *child)
 250 {
 251     const bool removingActive = WXIsActiveChild(child);
 252     if ( removingActive )
 253     {
 254         SetActiveChild(NULL);
 255         WXSetChildMenuBar(NULL);
 256     }
 257
 258     wxGenericMDIClientWindow * const client = GetGenericClientWindow();
 259     wxCHECK_RET( client, "should have client window" );
 260
 261     wxBookCtrlBase * const book = client->GetBookCtrl();
 262
 263     // Remove page if still there
 264     int pos = client->FindChild(child);
 265     if ( pos != wxNOT_FOUND )
 266     {
 267         if ( book->RemovePage(pos) )
 268             book->Refresh();
 269     }
 270
 271     if ( removingActive )
 272     {
 273         // Set the new selection to a remaining page
 274         const size_t count = book->GetPageCount();
 275         if ( count > (size_t)pos )
 276         {
 277             book->SetSelection(pos);
 278         }
 279         else
 280         {
 281             if ( count > 0 )
 282                 book->SetSelection(count - 1);
 283         }
 284     }
 285 }
 286
 287 bool
 288 wxGenericMDIParentFrame::WXIsActiveChild(wxGenericMDIChildFrame *child) const
 289 {
 290     return static_cast<wxMDIChildFrameBase *>(GetActiveChild()) == child;
 291 }
 292
 293 #if wxUSE_MENUS
 294 void wxGenericMDIParentFrame::RemoveWindowMenu(wxMenuBar *pMenuBar)
 295 {
 296     if (pMenuBar && m_windowMenu)
 297     {
 298         // Remove old window menu
 299         int pos = pMenuBar->FindMenu(_("&Window"));
 300         if (pos != wxNOT_FOUND)
 301         {
 302             wxASSERT(m_windowMenu == pMenuBar->GetMenu(pos)); // DBG:: We're going to delete the wrong menu!!!
 303             pMenuBar->Remove(pos);
 304         }
 305     }
 306 }
 307
 308 void wxGenericMDIParentFrame::AddWindowMenu(wxMenuBar *pMenuBar)
 309 {
 310     if (pMenuBar && m_windowMenu)
 311     {
 312         int pos = pMenuBar->FindMenu(wxGetStockLabel(wxID_HELP,false));
 313         if (pos == wxNOT_FOUND)
 314         {
 315             pMenuBar->Append(m_windowMenu, _("&Window"));
 316         }
 317         else
 318         {
 319             pMenuBar->Insert(pos, m_windowMenu, _("&Window"));
 320         }
 321     }
 322 }
 323
 324 void wxGenericMDIParentFrame::OnWindowMenu(wxCommandEvent &event)
 325 {
 326     switch ( event.GetId() )
 327     {
 328         case wxWINDOWCLOSE:
 329             if ( m_currentChild )
 330                 m_currentChild->Close();
 331             break;
 332
 333         case wxWINDOWCLOSEALL:
 334             CloseAll();
 335             break;
 336
 337         case wxWINDOWNEXT:
 338             ActivateNext();
 339             break;
 340
 341         case wxWINDOWPREV:
 342             ActivatePrevious();
 343             break;
 344
 345         default:
 346             event.Skip();
 347     }
 348 }
 349 #endif // wxUSE_MENUS
 350
 351 void wxGenericMDIParentFrame::OnClose(wxCloseEvent& event)
 352 {
 353     if ( !CloseAll() )
 354         event.Veto();
 355     else
 356         event.Skip();
 357 }
 358
 359 bool wxGenericMDIParentFrame::ProcessEvent(wxEvent& event)
 360 {
 361     if ( m_currentChild )
 362     {
 363         // the menu events should be given to the child as we show its menu bar
 364         // as our own
 365         const wxEventType eventType = event.GetEventType();
 366         if ( eventType == wxEVT_COMMAND_MENU_SELECTED ||
 367              eventType == wxEVT_UPDATE_UI )
 368         {
 369             // set the flag indicating that this event was forwarded to the
 370             // child from the parent and so shouldn't be propagated upwards if
 371             // not processed to avoid infinite loop
 372             m_childHandler = m_currentChild;
 373             wxON_BLOCK_EXIT_NULL(m_childHandler);
 374
 375             if ( m_currentChild->ProcessWindowEvent(event) )
 376                 return true;
 377         }
 378     }
 379
 380     return wxMDIParentFrameBase::ProcessEvent(event);
 381 }
 382
 383 // ----------------------------------------------------------------------------
 384 // wxGenericMDIChildFrame
 385 // ----------------------------------------------------------------------------
 386
 387 IMPLEMENT_DYNAMIC_CLASS(wxGenericMDIChildFrame, wxFrame)
 388
 389 BEGIN_EVENT_TABLE(wxGenericMDIChildFrame, wxFrame)
 390     EVT_MENU_HIGHLIGHT_ALL(wxGenericMDIChildFrame::OnMenuHighlight)
 391
 392     EVT_CLOSE(wxGenericMDIChildFrame::OnClose)
 393 END_EVENT_TABLE()
 394
 395 void wxGenericMDIChildFrame::Init()
 396 {
 397 #if wxUSE_MENUS
 398     m_pMenuBar = NULL;
 399 #endif // wxUSE_MENUS
 400
 401 #if !wxUSE_GENERIC_MDI_AS_NATIVE
 402     m_mdiParentGeneric = NULL;
 403 #endif
 404 }
 405
 406 wxGenericMDIChildFrame::~wxGenericMDIChildFrame()
 407 {
 408     wxGenericMDIParentFrame * const parent = GetGenericMDIParent();
 409
 410     // it could happen that we don't have a valid parent if we hadn't been ever
 411     // really created -- but in this case there is nothing else to do neither
 412     if ( parent )
 413         parent->WXRemoveChild(this);
 414
 415 #if wxUSE_MENUS
 416     delete m_pMenuBar;
 417 #endif // wxUSE_MENUS
 418 }
 419
 420 bool wxGenericMDIChildFrame::Create(wxGenericMDIParentFrame *parent,
 421                                     wxWindowID id,
 422                                     const wxString& title,
 423                                     const wxPoint& WXUNUSED(pos),
 424                                     const wxSize& size,
 425                                     long WXUNUSED(style),
 426                                     const wxString& name)
 427 {
 428     // unfortunately we can't use the base class m_mdiParent field unless
 429     // wxGenericMDIParentFrame is wxMDIParentFrame
 430 #if wxUSE_GENERIC_MDI_AS_NATIVE
 431     m_mdiParent = parent;
 432 #else // generic != native
 433     // leave m_mdiParent NULL, we don't have it
 434     m_mdiParentGeneric = parent;
 435 #endif
 436
 437     wxBookCtrlBase * const book = parent->GetBookCtrl();
 438
 439     wxASSERT_MSG( book, "Missing MDI client window." );
 440
 441     // note that we ignore the styles, none of the usual TLW styles apply to
 442     // this (child) window
 443     if ( !wxWindow::Create(book, id, wxDefaultPosition, size, 0, name) )
 444         return false;
 445
 446     m_title = title;
 447     book->AddPage(this, title, true);
 448
 449     return true;
 450 }
 451
 452 #if wxUSE_MENUS
 453 void wxGenericMDIChildFrame::SetMenuBar( wxMenuBar *menu_bar )
 454 {
 455     wxMenuBar *pOldMenuBar = m_pMenuBar;
 456     m_pMenuBar = menu_bar;
 457
 458     if (m_pMenuBar)
 459     {
 460         wxGenericMDIParentFrame *parent = GetGenericMDIParent();
 461
 462         if ( parent )
 463         {
 464             m_pMenuBar->SetParent(parent);
 465
 466             if ( parent->WXIsActiveChild(this) )
 467             {
 468                 // Replace current menu bars
 469                 if (pOldMenuBar)
 470                     parent->WXSetChildMenuBar(NULL);
 471                 parent->WXSetChildMenuBar(this);
 472             }
 473         }
 474     }
 475 }
 476
 477 wxMenuBar *wxGenericMDIChildFrame::GetMenuBar() const
 478 {
 479     return m_pMenuBar;
 480 }
 481 #endif // wxUSE_MENUS
 482
 483 void wxGenericMDIChildFrame::SetTitle(const wxString& title)
 484 {
 485     m_title = title;
 486
 487     wxGenericMDIParentFrame * const parent = GetGenericMDIParent();
 488     if ( parent )
 489         parent->WXUpdateChildTitle(this);
 490     //else: it's ok, we might be not created yet
 491 }
 492
 493 void wxGenericMDIChildFrame::Activate()
 494 {
 495     wxGenericMDIParentFrame * const parent = GetGenericMDIParent();
 496
 497     wxCHECK_RET( parent, "can't activate MDI child without parent" );
 498     parent->WXActivateChild(this);
 499 }
 500
 501 void wxGenericMDIChildFrame::OnMenuHighlight(wxMenuEvent& event)
 502 {
 503     wxGenericMDIParentFrame * const parent = GetGenericMDIParent();
 504     if ( parent)
 505     {
 506         // we don't have any help text for this item,
 507         // but may be the MDI frame does?
 508         parent->OnMenuHighlight(event);
 509     }
 510 }
 511
 512 void wxGenericMDIChildFrame::OnClose(wxCloseEvent& WXUNUSED(event))
 513 {
 514     // we're not a TLW so don't delay the destruction of this window
 515     delete this;
 516 }
 517
 518 bool wxGenericMDIChildFrame::TryAfter(wxEvent& event)
 519 {
 520     // we shouldn't propagate the event to the parent if we received it from it
 521     // in the first place
 522     wxGenericMDIParentFrame * const parent = GetGenericMDIParent();
 523     if ( parent && parent->WXIsInsideChildHandler(this) )
 524         return false;
 525
 526     return wxTDIChildFrame::TryAfter(event);
 527 }
 528
 529 // ----------------------------------------------------------------------------
 530 // wxGenericMDIClientWindow
 531 // ----------------------------------------------------------------------------
 532
 533 IMPLEMENT_DYNAMIC_CLASS(wxGenericMDIClientWindow, wxWindow)
 534
 535 bool
 536 wxGenericMDIClientWindow::CreateGenericClient(wxWindow *parent)
 537 {
 538     if ( !wxWindow::Create(parent, wxID_ANY) )
 539         return false;
 540
 541     m_notebook = new wxNotebook(this, wxID_ANY);
 542     m_notebook->Connect
 543                 (
 544                     wxEVT_COMMAND_NOTEBOOK_PAGE_CHANGED,
 545                     wxNotebookEventHandler(
 546                         wxGenericMDIClientWindow::OnPageChanged),
 547                     NULL,
 548                     this
 549                 );
 550
 551     // now that we have a notebook to resize, hook up OnSize() too
 552     Connect(wxEVT_SIZE, wxSizeEventHandler(wxGenericMDIClientWindow::OnSize));
 553
 554     return true;
 555 }
 556
 557 wxBookCtrlBase *wxGenericMDIClientWindow::GetBookCtrl() const
 558 {
 559     return m_notebook;
 560 }
 561
 562 wxGenericMDIChildFrame *wxGenericMDIClientWindow::GetChild(size_t pos) const
 563 {
 564     return static_cast<wxGenericMDIChildFrame *>(GetBookCtrl()->GetPage(pos));
 565 }
 566
 567 int wxGenericMDIClientWindow::FindChild(wxGenericMDIChildFrame *child) const
 568 {
 569     wxBookCtrlBase * const book = GetBookCtrl();
 570     const size_t count = book->GetPageCount();
 571     for ( size_t pos = 0; pos < count; pos++ )
 572     {
 573         if ( book->GetPage(pos) == child )
 574             return pos;
 575     }
 576
 577     return wxNOT_FOUND;
 578 }
 579
 580 void wxGenericMDIClientWindow::PageChanged(int oldSelection, int newSelection)
 581 {
 582     // Don't do anything if nothing changed
 583     if (oldSelection == newSelection)
 584         return;
 585
 586     // Again check if we really need to do this...
 587     if (newSelection != -1)
 588     {
 589         wxGenericMDIChildFrame * const child = GetChild(newSelection);
 590
 591         if ( child->GetGenericMDIParent()->WXIsActiveChild(child) )
 592             return;
 593     }
 594
 595     // Notify old active child that it has been deactivated
 596     if (oldSelection != -1)
 597     {
 598         wxGenericMDIChildFrame * const oldChild = GetChild(oldSelection);
 599         if (oldChild)
 600         {
 601             wxActivateEvent event(wxEVT_ACTIVATE, false, oldChild->GetId());
 602             event.SetEventObject( oldChild );
 603             oldChild->GetEventHandler()->ProcessEvent(event);
 604         }
 605     }
 606
 607     // Notify new active child that it has been activated
 608     if (newSelection != -1)
 609     {
 610         wxGenericMDIChildFrame * const activeChild = GetChild(newSelection);
 611         if ( activeChild )
 612         {
 613             wxActivateEvent event(wxEVT_ACTIVATE, true, activeChild->GetId());
 614             event.SetEventObject( activeChild );
 615             activeChild->GetEventHandler()->ProcessEvent(event);
 616
 617             wxGenericMDIParentFrame * const
 618                 parent = activeChild->GetGenericMDIParent();
 619
 620             if ( parent )
 621             {
 622                 // this is a dirty hack as activeChild is not really a
 623                 // wxMDIChildFrame at all but we still want to store it in the
 624                 // base class m_currentChild field and this will work as long
 625                 // as we only use as wxMDIChildFrameBase pointer (which it is)
 626                 parent->SetActiveChild(
 627                     reinterpret_cast<wxMDIChildFrame *>(activeChild));
 628                 parent->WXSetChildMenuBar(activeChild);
 629             }
 630         }
 631     }
 632 }
 633
 634 void wxGenericMDIClientWindow::OnPageChanged(wxBookCtrlEvent& event)
 635 {
 636     PageChanged(event.GetOldSelection(), event.GetSelection());
 637
 638     event.Skip();
 639 }
 640
 641 void wxGenericMDIClientWindow::OnSize(wxSizeEvent& WXUNUSED(event))
 642 {
 643     m_notebook->SetSize(GetClientSize());
 644 }
 645
 646 #endif // wxUSE_MDI
 647