src/common/bookctrl.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/bookctrl.cpp
   3 // Purpose:     wxBookCtrlBase implementation
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     19.08.03
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2003 Vadim Zeitlin <vadim@wxwindows.org>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_BOOKCTRL
  28
  29 #include "wx/imaglist.h"
  30
  31 #include "wx/bookctrl.h"
  32
  33 // ============================================================================
  34 // implementation
  35 // ============================================================================
  36
  37 // ----------------------------------------------------------------------------
  38 // event table
  39 // ----------------------------------------------------------------------------
  40
  41 IMPLEMENT_ABSTRACT_CLASS(wxBookCtrlBase, wxControl)
  42
  43 BEGIN_EVENT_TABLE(wxBookCtrlBase, wxControl)
  44     EVT_SIZE(wxBookCtrlBase::OnSize)
  45 #if wxUSE_HELP
  46     EVT_HELP(wxID_ANY, wxBookCtrlBase::OnHelp)
  47 #endif // wxUSE_HELP
  48 END_EVENT_TABLE()
  49
  50 // ----------------------------------------------------------------------------
  51 // constructors and destructors
  52 // ----------------------------------------------------------------------------
  53
  54 void wxBookCtrlBase::Init()
  55 {
  56     m_bookctrl = NULL;
  57     m_imageList = NULL;
  58     m_ownsImageList = false;
  59     m_fitToCurrentPage = false;
  60
  61 #if defined(__WXWINCE__)
  62     m_internalBorder = 1;
  63 #else
  64     m_internalBorder = 5;
  65 #endif
  66
  67     m_controlMargin = 0;
  68     m_controlSizer = NULL;
  69 }
  70
  71 bool
  72 wxBookCtrlBase::Create(wxWindow *parent,
  73                        wxWindowID id,
  74                        const wxPoint& pos,
  75                        const wxSize& size,
  76                        long style,
  77                        const wxString& name)
  78 {
  79     return wxControl::Create
  80                      (
  81                         parent,
  82                         id,
  83                         pos,
  84                         size,
  85                         style,
  86                         wxDefaultValidator,
  87                         name
  88                      );
  89 }
  90
  91 wxBookCtrlBase::~wxBookCtrlBase()
  92 {
  93     if ( m_ownsImageList )
  94     {
  95         // may be NULL, ok
  96         delete m_imageList;
  97     }
  98 }
  99
 100 // ----------------------------------------------------------------------------
 101 // image list
 102 // ----------------------------------------------------------------------------
 103
 104 void wxBookCtrlBase::SetImageList(wxImageList *imageList)
 105 {
 106     if ( m_ownsImageList )
 107     {
 108         // may be NULL, ok
 109         delete m_imageList;
 110
 111         m_ownsImageList = false;
 112     }
 113
 114     m_imageList = imageList;
 115 }
 116
 117 void wxBookCtrlBase::AssignImageList(wxImageList* imageList)
 118 {
 119     SetImageList(imageList);
 120
 121     m_ownsImageList = true;
 122 }
 123
 124 // ----------------------------------------------------------------------------
 125 // geometry
 126 // ----------------------------------------------------------------------------
 127
 128 void wxBookCtrlBase::DoInvalidateBestSize()
 129 {
 130     // notice that it is not necessary to invalidate our own best size
 131     // explicitly if we have m_bookctrl as it will already invalidate the best
 132     // size of its parent when its own size is invalidated and its parent is
 133     // this control
 134     if ( m_bookctrl )
 135         m_bookctrl->InvalidateBestSize();
 136     else
 137         wxControl::InvalidateBestSize();
 138 }
 139
 140 void wxBookCtrlBase::SetPageSize(const wxSize& size)
 141 {
 142     SetClientSize(CalcSizeFromPage(size));
 143 }
 144
 145 wxSize wxBookCtrlBase::DoGetBestSize() const
 146 {
 147     wxSize bestSize;
 148
 149     // iterate over all pages, get the largest width and height
 150     const size_t nCount = m_pages.size();
 151     for ( size_t nPage = 0; nPage < nCount; nPage++ )
 152     {
 153         const wxWindow * const pPage = m_pages[nPage];
 154         if( pPage )
 155         {
 156             wxSize childBestSize(pPage->GetBestSize());
 157
 158             if ( childBestSize.x > bestSize.x )
 159                 bestSize.x = childBestSize.x;
 160
 161             if ( childBestSize.y > bestSize.y )
 162                 bestSize.y = childBestSize.y;
 163         }
 164     }
 165
 166     if (m_fitToCurrentPage && GetCurrentPage())
 167         bestSize = GetCurrentPage()->GetBestSize();
 168
 169     // convert display area to window area, adding the size necessary for the
 170     // tabs
 171     wxSize best = CalcSizeFromPage(bestSize);
 172     CacheBestSize(best);
 173     return best;
 174 }
 175
 176 wxRect wxBookCtrlBase::GetPageRect() const
 177 {
 178     const wxSize size = GetControllerSize();
 179
 180     wxPoint pt;
 181     wxRect rectPage(pt, GetClientSize());
 182
 183     switch ( GetWindowStyle() & wxBK_ALIGN_MASK )
 184     {
 185         default:
 186             wxFAIL_MSG( wxT("unexpected alignment") );
 187             // fall through
 188
 189         case wxBK_TOP:
 190             rectPage.y = size.y + GetInternalBorder();
 191             // fall through
 192
 193         case wxBK_BOTTOM:
 194             rectPage.height -= size.y + GetInternalBorder();
 195             if (rectPage.height < 0)
 196                 rectPage.height = 0;
 197             break;
 198
 199         case wxBK_LEFT:
 200             rectPage.x = size.x + GetInternalBorder();
 201             // fall through
 202
 203         case wxBK_RIGHT:
 204             rectPage.width -= size.x + GetInternalBorder();
 205             if (rectPage.width < 0)
 206                 rectPage.width = 0;
 207             break;
 208     }
 209
 210     return rectPage;
 211 }
 212
 213 // Lay out controls
 214 void wxBookCtrlBase::DoSize()
 215 {
 216     if ( !m_bookctrl )
 217     {
 218         // we're not fully created yet or OnSize() should be hidden by derived class
 219         return;
 220     }
 221
 222     if (GetSizer())
 223         Layout();
 224     else
 225     {
 226         // resize controller and the page area to fit inside our new size
 227         const wxSize sizeClient( GetClientSize() ),
 228                     sizeBorder( m_bookctrl->GetSize() - m_bookctrl->GetClientSize() ),
 229                     sizeCtrl( GetControllerSize() );
 230
 231         m_bookctrl->SetClientSize( sizeCtrl.x - sizeBorder.x, sizeCtrl.y - sizeBorder.y );
 232         // if this changes the visibility of the scrollbars the best size changes, relayout in this case
 233         wxSize sizeCtrl2 = GetControllerSize();
 234         if ( sizeCtrl != sizeCtrl2 )
 235         {
 236             wxSize sizeBorder2 = m_bookctrl->GetSize() - m_bookctrl->GetClientSize();
 237             m_bookctrl->SetClientSize( sizeCtrl2.x - sizeBorder2.x, sizeCtrl2.y - sizeBorder2.y );
 238         }
 239
 240         const wxSize sizeNew = m_bookctrl->GetSize();
 241         wxPoint posCtrl;
 242         switch ( GetWindowStyle() & wxBK_ALIGN_MASK )
 243         {
 244             default:
 245                 wxFAIL_MSG( wxT("unexpected alignment") );
 246                 // fall through
 247
 248             case wxBK_TOP:
 249             case wxBK_LEFT:
 250                 // posCtrl is already ok
 251                 break;
 252
 253             case wxBK_BOTTOM:
 254                 posCtrl.y = sizeClient.y - sizeNew.y;
 255                 break;
 256
 257             case wxBK_RIGHT:
 258                 posCtrl.x = sizeClient.x - sizeNew.x;
 259                 break;
 260         }
 261
 262         if ( m_bookctrl->GetPosition() != posCtrl )
 263             m_bookctrl->Move(posCtrl);
 264     }
 265
 266     // resize all pages to fit the new control size
 267     const wxRect pageRect = GetPageRect();
 268     const unsigned pagesCount = m_pages.GetCount();
 269     for ( unsigned int i = 0; i < pagesCount; ++i )
 270     {
 271         wxWindow * const page = m_pages[i];
 272         if ( !page )
 273         {
 274             wxASSERT_MSG( AllowNullPage(),
 275                 wxT("Null page in a control that does not allow null pages?") );
 276             continue;
 277         }
 278
 279         page->SetSize(pageRect);
 280     }
 281 }
 282
 283 void wxBookCtrlBase::OnSize(wxSizeEvent& event)
 284 {
 285     event.Skip();
 286
 287     DoSize();
 288 }
 289
 290 wxSize wxBookCtrlBase::GetControllerSize() const
 291 {
 292     if ( !m_bookctrl )
 293         return wxSize(0, 0);
 294
 295     const wxSize sizeClient = GetClientSize(),
 296                  sizeCtrl = m_bookctrl->GetBestSize();
 297
 298     wxSize size;
 299
 300     if ( IsVertical() )
 301     {
 302         size.x = sizeClient.x;
 303         size.y = sizeCtrl.y;
 304     }
 305     else // left/right aligned
 306     {
 307         size.x = sizeCtrl.x;
 308         size.y = sizeClient.y;
 309     }
 310
 311     return size;
 312 }
 313
 314 // ----------------------------------------------------------------------------
 315 // miscellaneous stuff
 316 // ----------------------------------------------------------------------------
 317
 318 #if wxUSE_HELP
 319
 320 void wxBookCtrlBase::OnHelp(wxHelpEvent& event)
 321 {
 322     // determine where does this even originate from to avoid redirecting it
 323     // back to the page which generated it (resulting in an infinite loop)
 324
 325     // notice that we have to check in the hard(er) way instead of just testing
 326     // if the event object == this because the book control can have other
 327     // subcontrols inside it (e.g. wxSpinButton in case of a notebook in wxUniv)
 328     wxWindow *source = wxStaticCast(event.GetEventObject(), wxWindow);
 329     while ( source && source != this && source->GetParent() != this )
 330     {
 331         source = source->GetParent();
 332     }
 333
 334     if ( source && m_pages.Index(source) == wxNOT_FOUND )
 335     {
 336         // this event is for the book control itself, redirect it to the
 337         // corresponding page
 338         wxWindow *page = NULL;
 339
 340         if ( event.GetOrigin() == wxHelpEvent::Origin_HelpButton )
 341         {
 342             // show help for the page under the mouse
 343             const int pagePos = HitTest(ScreenToClient(event.GetPosition()));
 344
 345             if ( pagePos != wxNOT_FOUND)
 346             {
 347                 page = GetPage((size_t)pagePos);
 348             }
 349         }
 350         else // event from keyboard or unknown source
 351         {
 352             // otherwise show the current page help
 353             page = GetCurrentPage();
 354         }
 355
 356         if ( page )
 357         {
 358             // change event object to the page to avoid infinite recursion if
 359             // we get this event ourselves if the page doesn't handle it
 360             event.SetEventObject(page);
 361
 362             if ( page->GetEventHandler()->ProcessEvent(event) )
 363             {
 364                 // don't call event.Skip()
 365                 return;
 366             }
 367         }
 368     }
 369     //else: event coming from one of our pages already
 370
 371     event.Skip();
 372 }
 373
 374 #endif // wxUSE_HELP
 375
 376 // ----------------------------------------------------------------------------
 377 // pages management
 378 // ----------------------------------------------------------------------------
 379
 380 bool
 381 wxBookCtrlBase::InsertPage(size_t nPage,
 382                            wxWindow *page,
 383                            const wxString& WXUNUSED(text),
 384                            bool WXUNUSED(bSelect),
 385                            int WXUNUSED(imageId))
 386 {
 387     wxCHECK_MSG( page || AllowNullPage(), false,
 388                  wxT("NULL page in wxBookCtrlBase::InsertPage()") );
 389     wxCHECK_MSG( nPage <= m_pages.size(), false,
 390                  wxT("invalid page index in wxBookCtrlBase::InsertPage()") );
 391
 392     m_pages.Insert(page, nPage);
 393     if ( page )
 394         page->SetSize(GetPageRect());
 395
 396     DoInvalidateBestSize();
 397
 398     return true;
 399 }
 400
 401 bool wxBookCtrlBase::DeletePage(size_t nPage)
 402 {
 403     wxWindow *page = DoRemovePage(nPage);
 404     if ( !(page || AllowNullPage()) )
 405         return false;
 406
 407     // delete NULL is harmless
 408     delete page;
 409
 410     return true;
 411 }
 412
 413 wxWindow *wxBookCtrlBase::DoRemovePage(size_t nPage)
 414 {
 415     wxCHECK_MSG( nPage < m_pages.size(), NULL,
 416                  wxT("invalid page index in wxBookCtrlBase::DoRemovePage()") );
 417
 418     wxWindow *pageRemoved = m_pages[nPage];
 419     m_pages.RemoveAt(nPage);
 420     DoInvalidateBestSize();
 421
 422     return pageRemoved;
 423 }
 424
 425 int wxBookCtrlBase::GetNextPage(bool forward) const
 426 {
 427     int nPage;
 428
 429     int nMax = GetPageCount();
 430     if ( nMax-- ) // decrement it to get the last valid index
 431     {
 432         int nSel = GetSelection();
 433
 434         // change selection wrapping if it becomes invalid
 435         nPage = forward ? nSel == nMax ? 0
 436                                        : nSel + 1
 437                         : nSel == 0 ? nMax
 438                                     : nSel - 1;
 439     }
 440     else // notebook is empty, no next page
 441     {
 442         nPage = wxNOT_FOUND;
 443     }
 444
 445     return nPage;
 446 }
 447
 448 int wxBookCtrlBase::DoSetSelection(size_t n, int flags)
 449 {
 450     wxCHECK_MSG( n < GetPageCount(), wxNOT_FOUND,
 451                  wxT("invalid page index in wxBookCtrlBase::DoSetSelection()") );
 452
 453     const int oldSel = GetSelection();
 454
 455     if ( n != (size_t)oldSel )
 456     {
 457         wxBookCtrlEvent *event = CreatePageChangingEvent();
 458         bool allowed = false;
 459
 460         if ( flags & SetSelection_SendEvent )
 461         {
 462             event->SetSelection(n);
 463             event->SetOldSelection(oldSel);
 464             event->SetEventObject(this);
 465
 466             allowed = !GetEventHandler()->ProcessEvent(*event) || event->IsAllowed();
 467         }
 468
 469         if ( !(flags & SetSelection_SendEvent) || allowed)
 470         {
 471             if ( oldSel != wxNOT_FOUND )
 472                 m_pages[oldSel]->Hide();
 473
 474             wxWindow *page = m_pages[n];
 475             page->SetSize(GetPageRect());
 476             page->Show();
 477
 478             // change selection now to ignore the selection change event
 479             UpdateSelectedPage(n);
 480
 481             if ( flags & SetSelection_SendEvent )
 482             {
 483                 // program allows the page change
 484                 MakeChangedEvent(*event);
 485                 (void)GetEventHandler()->ProcessEvent(*event);
 486             }
 487         }
 488
 489         delete event;
 490     }
 491
 492     return oldSel;
 493 }
 494
 495 IMPLEMENT_DYNAMIC_CLASS(wxBookCtrlEvent, wxNotifyEvent)
 496
 497 #endif // wxUSE_BOOKCTRL