src/generic/wizard.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/wizard.cpp
   3 // Purpose:     generic implementation of wxWizard class
   4 // Author:      Vadim Zeitlin
   5 // Modified by: Robert Cavanaugh
   6 //              1) Added capability for wxWizardPage to accept resources
   7 //              2) Added "Help" button handler stub
   8 //              3) Fixed ShowPage() bug on displaying bitmaps
   9 //              Robert Vazan (sizers)
  10 // Created:     15.08.99
  11 // RCS-ID:      $Id$
  12 // Copyright:   (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
  13 // Licence:     wxWindows licence
  14 ///////////////////////////////////////////////////////////////////////////////
  15
  16 // ============================================================================
  17 // declarations
  18 // ============================================================================
  19
  20 // ----------------------------------------------------------------------------
  21 // headers
  22 // ----------------------------------------------------------------------------
  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 #if wxUSE_WIZARDDLG
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/dynarray.h"
  35     #include "wx/intl.h"
  36     #include "wx/statbmp.h"
  37     #include "wx/button.h"
  38     #include "wx/settings.h"
  39     #include "wx/sizer.h"
  40 #endif //WX_PRECOMP
  41
  42 #include "wx/statline.h"
  43
  44 #include "wx/wizard.h"
  45
  46 // ----------------------------------------------------------------------------
  47 // wxWizardSizer
  48 // ----------------------------------------------------------------------------
  49
  50 class wxWizardSizer : public wxSizer
  51 {
  52 public:
  53     wxWizardSizer(wxWizard *owner);
  54
  55     virtual wxSizerItem *Insert(size_t index, wxSizerItem *item);
  56
  57     virtual void RecalcSizes();
  58     virtual wxSize CalcMin();
  59
  60     // get the max size of all wizard pages
  61     wxSize GetMaxChildSize();
  62
  63     // return the border which can be either set using wxWizard::SetBorder() or
  64     // have default value
  65     int GetBorder() const;
  66
  67     // hide the pages which we temporarily "show" when they're added to this
  68     // sizer (see Insert())
  69     void HidePages();
  70
  71 private:
  72     wxSize SiblingSize(wxSizerItem *child);
  73
  74     wxWizard *m_owner;
  75     wxSize m_childSize;
  76 };
  77
  78 // ----------------------------------------------------------------------------
  79 // event tables and such
  80 // ----------------------------------------------------------------------------
  81
  82 DEFINE_EVENT_TYPE(wxEVT_WIZARD_PAGE_CHANGED)
  83 DEFINE_EVENT_TYPE(wxEVT_WIZARD_PAGE_CHANGING)
  84 DEFINE_EVENT_TYPE(wxEVT_WIZARD_CANCEL)
  85 DEFINE_EVENT_TYPE(wxEVT_WIZARD_FINISHED)
  86 DEFINE_EVENT_TYPE(wxEVT_WIZARD_HELP)
  87
  88 BEGIN_EVENT_TABLE(wxWizard, wxDialog)
  89     EVT_BUTTON(wxID_CANCEL, wxWizard::OnCancel)
  90     EVT_BUTTON(wxID_BACKWARD, wxWizard::OnBackOrNext)
  91     EVT_BUTTON(wxID_FORWARD, wxWizard::OnBackOrNext)
  92     EVT_BUTTON(wxID_HELP, wxWizard::OnHelp)
  93
  94     EVT_WIZARD_PAGE_CHANGED(wxID_ANY, wxWizard::OnWizEvent)
  95     EVT_WIZARD_PAGE_CHANGING(wxID_ANY, wxWizard::OnWizEvent)
  96     EVT_WIZARD_CANCEL(wxID_ANY, wxWizard::OnWizEvent)
  97     EVT_WIZARD_FINISHED(wxID_ANY, wxWizard::OnWizEvent)
  98     EVT_WIZARD_HELP(wxID_ANY, wxWizard::OnWizEvent)
  99 END_EVENT_TABLE()
 100
 101 IMPLEMENT_DYNAMIC_CLASS(wxWizard, wxDialog)
 102
 103 /*
 104     TODO PROPERTIES :
 105     wxWizard
 106         extstyle
 107         title
 108 */
 109
 110 IMPLEMENT_ABSTRACT_CLASS(wxWizardPage, wxPanel)
 111 IMPLEMENT_DYNAMIC_CLASS(wxWizardPageSimple, wxWizardPage)
 112 IMPLEMENT_DYNAMIC_CLASS(wxWizardEvent, wxNotifyEvent)
 113
 114 // ============================================================================
 115 // implementation
 116 // ============================================================================
 117
 118 // ----------------------------------------------------------------------------
 119 // wxWizardPage
 120 // ----------------------------------------------------------------------------
 121
 122 void wxWizardPage::Init()
 123 {
 124     m_bitmap = wxNullBitmap;
 125 }
 126
 127 wxWizardPage::wxWizardPage(wxWizard *parent,
 128                            const wxBitmap& bitmap)
 129 {
 130     Create(parent, bitmap);
 131 }
 132
 133 bool wxWizardPage::Create(wxWizard *parent,
 134                           const wxBitmap& bitmap)
 135 {
 136     if ( !wxPanel::Create(parent, wxID_ANY) )
 137         return false;
 138
 139     m_bitmap = bitmap;
 140
 141     // initially the page is hidden, it's shown only when it becomes current
 142     Hide();
 143
 144     return true;
 145 }
 146
 147 // ----------------------------------------------------------------------------
 148 // wxWizardPageSimple
 149 // ----------------------------------------------------------------------------
 150
 151 wxWizardPage *wxWizardPageSimple::GetPrev() const
 152 {
 153     return m_prev;
 154 }
 155
 156 wxWizardPage *wxWizardPageSimple::GetNext() const
 157 {
 158     return m_next;
 159 }
 160
 161 // ----------------------------------------------------------------------------
 162 // wxWizardSizer
 163 // ----------------------------------------------------------------------------
 164
 165 wxWizardSizer::wxWizardSizer(wxWizard *owner)
 166              : m_owner(owner),
 167                m_childSize(wxDefaultSize)
 168 {
 169 }
 170
 171 wxSizerItem *wxWizardSizer::Insert(size_t index, wxSizerItem *item)
 172 {
 173     m_owner->m_usingSizer = true;
 174
 175     if ( item->IsWindow() )
 176     {
 177         // we must pretend that the window is shown as otherwise it wouldn't be
 178         // taken into account for the layout -- but avoid really showing it, so
 179         // just set the internal flag instead of calling wxWindow::Show()
 180         item->GetWindow()->wxWindowBase::Show();
 181     }
 182
 183     return wxSizer::Insert(index, item);
 184 }
 185
 186 void wxWizardSizer::HidePages()
 187 {
 188     for ( wxSizerItemList::compatibility_iterator node = GetChildren().GetFirst();
 189           node;
 190           node = node->GetNext() )
 191     {
 192         wxSizerItem * const item = node->GetData();
 193         if ( item->IsWindow() )
 194             item->GetWindow()->wxWindowBase::Show(false);
 195     }
 196 }
 197
 198 void wxWizardSizer::RecalcSizes()
 199 {
 200     // Effect of this function depends on m_owner->m_page and
 201     // it should be called whenever it changes (wxWizard::ShowPage)
 202     if ( m_owner->m_page )
 203     {
 204         m_owner->m_page->SetSize(wxRect(m_position, m_size));
 205     }
 206 }
 207
 208 wxSize wxWizardSizer::CalcMin()
 209 {
 210     return m_owner->GetPageSize();
 211 }
 212
 213 wxSize wxWizardSizer::GetMaxChildSize()
 214 {
 215 #if !defined(__WXDEBUG__)
 216     if ( m_childSize.IsFullySpecified() )
 217         return m_childSize;
 218 #endif
 219
 220     wxSize maxOfMin;
 221
 222     for ( wxSizerItemList::compatibility_iterator childNode = m_children.GetFirst();
 223           childNode;
 224           childNode = childNode->GetNext() )
 225     {
 226         wxSizerItem *child = childNode->GetData();
 227         maxOfMin.IncTo(child->CalcMin());
 228         maxOfMin.IncTo(SiblingSize(child));
 229     }
 230
 231 #ifdef __WXDEBUG__
 232     if ( m_childSize.IsFullySpecified() && m_childSize != maxOfMin )
 233     {
 234         wxFAIL_MSG( _T("Size changed in wxWizard::GetPageAreaSizer()")
 235                     _T("after RunWizard().\n")
 236                     _T("Did you forget to call GetSizer()->Fit(this) ")
 237                     _T("for some page?")) ;
 238
 239         return m_childSize;
 240     }
 241 #endif // __WXDEBUG__
 242
 243     if ( m_owner->m_started )
 244     {
 245         m_childSize = maxOfMin;
 246     }
 247
 248     return maxOfMin;
 249 }
 250
 251 int wxWizardSizer::GetBorder() const
 252 {
 253     return m_owner->m_border;
 254 }
 255
 256 wxSize wxWizardSizer::SiblingSize(wxSizerItem *child)
 257 {
 258     wxSize maxSibling;
 259
 260     if ( child->IsWindow() )
 261     {
 262         wxWizardPage *page = wxDynamicCast(child->GetWindow(), wxWizardPage);
 263         if ( page )
 264         {
 265             for ( wxWizardPage *sibling = page->GetNext();
 266                   sibling;
 267                   sibling = sibling->GetNext() )
 268             {
 269                 if ( sibling->GetSizer() )
 270                 {
 271                     maxSibling.IncTo(sibling->GetSizer()->CalcMin());
 272                 }
 273             }
 274         }
 275     }
 276
 277     return maxSibling;
 278 }
 279
 280 // ----------------------------------------------------------------------------
 281 // generic wxWizard implementation
 282 // ----------------------------------------------------------------------------
 283
 284 void wxWizard::Init()
 285 {
 286     m_posWizard = wxDefaultPosition;
 287     m_page = (wxWizardPage *)NULL;
 288     m_btnPrev = m_btnNext = NULL;
 289     m_statbmp = NULL;
 290     m_sizerBmpAndPage = NULL;
 291     m_sizerPage = NULL;
 292     m_border = 5;
 293     m_started = false;
 294     m_wasModal = false;
 295     m_usingSizer = false;
 296 }
 297
 298 bool wxWizard::Create(wxWindow *parent,
 299                       int id,
 300                       const wxString& title,
 301                       const wxBitmap& bitmap,
 302                       const wxPoint& pos,
 303                       long style)
 304 {
 305     bool result = wxDialog::Create(parent,id,title,pos,wxDefaultSize,style);
 306
 307     m_posWizard = pos;
 308     m_bitmap = bitmap ;
 309
 310     DoCreateControls();
 311
 312     return result;
 313 }
 314
 315 void wxWizard::AddBitmapRow(wxBoxSizer *mainColumn)
 316 {
 317     m_sizerBmpAndPage = new wxBoxSizer(wxHORIZONTAL);
 318     mainColumn->Add(
 319         m_sizerBmpAndPage,
 320         1, // Vertically stretchable
 321         wxEXPAND // Horizonal stretching, no border
 322     );
 323     mainColumn->Add(0,5,
 324         0, // No vertical stretching
 325         wxEXPAND // No border, (mostly useless) horizontal stretching
 326     );
 327
 328 #if wxUSE_STATBMP
 329     if ( m_bitmap.Ok() )
 330     {
 331         m_statbmp = new wxStaticBitmap(this, wxID_ANY, m_bitmap);
 332         m_sizerBmpAndPage->Add(
 333             m_statbmp,
 334             0, // No horizontal stretching
 335             wxALL, // Border all around, top alignment
 336             5 // Border width
 337         );
 338         m_sizerBmpAndPage->Add(
 339             5,0,
 340             0, // No horizontal stretching
 341             wxEXPAND // No border, (mostly useless) vertical stretching
 342         );
 343     }
 344 #endif
 345
 346     // Added to m_sizerBmpAndPage later
 347     m_sizerPage = new wxWizardSizer(this);
 348 }
 349
 350 void wxWizard::AddStaticLine(wxBoxSizer *mainColumn)
 351 {
 352 #if wxUSE_STATLINE
 353     mainColumn->Add(
 354         new wxStaticLine(this, wxID_ANY),
 355         0, // Vertically unstretchable
 356         wxEXPAND | wxALL, // Border all around, horizontally stretchable
 357         5 // Border width
 358     );
 359     mainColumn->Add(0,5,
 360         0, // No vertical stretching
 361         wxEXPAND // No border, (mostly useless) horizontal stretching
 362     );
 363 #else
 364     (void)mainColumn;
 365 #endif // wxUSE_STATLINE
 366 }
 367
 368 void wxWizard::AddBackNextPair(wxBoxSizer *buttonRow)
 369 {
 370     wxASSERT_MSG( m_btnNext && m_btnPrev,
 371                   _T("You must create the buttons before calling ")
 372                   _T("wxWizard::AddBackNextPair") );
 373
 374     // margin between Back and Next buttons
 375 #ifdef __WXMAC__
 376     static const int BACKNEXT_MARGIN = 10;
 377 #else
 378     static const int BACKNEXT_MARGIN = 0;
 379 #endif
 380
 381     wxBoxSizer *backNextPair = new wxBoxSizer(wxHORIZONTAL);
 382     buttonRow->Add(
 383         backNextPair,
 384         0, // No horizontal stretching
 385         wxALL, // Border all around
 386         5 // Border width
 387     );
 388
 389     backNextPair->Add(m_btnPrev);
 390     backNextPair->Add(BACKNEXT_MARGIN,0,
 391         0, // No horizontal stretching
 392         wxEXPAND // No border, (mostly useless) vertical stretching
 393     );
 394     backNextPair->Add(m_btnNext);
 395 }
 396
 397 void wxWizard::AddButtonRow(wxBoxSizer *mainColumn)
 398 {
 399     // the order in which the buttons are created determines the TAB order - at least under MSWindows...
 400     // although the 'back' button appears before the 'next' button, a more userfriendly tab order is
 401     // to activate the 'next' button first (create the next button before the back button).
 402     // The reason is: The user will repeatedly enter information in the wizard pages and then wants to
 403     // press 'next'. If a user uses mostly the keyboard, he would have to skip the 'back' button
 404     // everytime. This is annoying. There is a second reason: RETURN acts as TAB. If the 'next'
 405     // button comes first in the TAB order, the user can enter information very fast using the RETURN
 406     // key to TAB to the next entry field and page. This would not be possible, if the 'back' button
 407     // was created before the 'next' button.
 408
 409     bool isPda = (wxSystemSettings::GetScreenType() <= wxSYS_SCREEN_PDA);
 410     int buttonStyle = isPda ? wxBU_EXACTFIT : 0;
 411
 412     wxBoxSizer *buttonRow = new wxBoxSizer(wxHORIZONTAL);
 413 #ifdef __WXMAC__
 414     if (GetExtraStyle() & wxWIZARD_EX_HELPBUTTON)
 415         mainColumn->Add(
 416             buttonRow,
 417             0, // Vertically unstretchable
 418             wxGROW|wxALIGN_CENTRE
 419             );
 420     else
 421 #endif
 422     mainColumn->Add(
 423         buttonRow,
 424         0, // Vertically unstretchable
 425         wxALIGN_RIGHT // Right aligned, no border
 426     );
 427
 428     // Desired TAB order is 'next', 'cancel', 'help', 'back'. This makes the 'back' button the last control on the page.
 429     // Create the buttons in the right order...
 430     wxButton *btnHelp=0;
 431 #ifdef __WXMAC__
 432     if (GetExtraStyle() & wxWIZARD_EX_HELPBUTTON)
 433         btnHelp=new wxButton(this, wxID_HELP, _("&Help"), wxDefaultPosition, wxDefaultSize, buttonStyle);
 434 #endif
 435
 436     m_btnNext = new wxButton(this, wxID_FORWARD, _("&Next >"));
 437     wxButton *btnCancel=new wxButton(this, wxID_CANCEL, _("&Cancel"), wxDefaultPosition, wxDefaultSize, buttonStyle);
 438 #ifndef __WXMAC__
 439     if (GetExtraStyle() & wxWIZARD_EX_HELPBUTTON)
 440         btnHelp=new wxButton(this, wxID_HELP, _("&Help"), wxDefaultPosition, wxDefaultSize, buttonStyle);
 441 #endif
 442     m_btnPrev = new wxButton(this, wxID_BACKWARD, _("< &Back"), wxDefaultPosition, wxDefaultSize, buttonStyle);
 443
 444     if (btnHelp)
 445     {
 446         buttonRow->Add(
 447             btnHelp,
 448             0, // Horizontally unstretchable
 449             wxALL, // Border all around, top aligned
 450             5 // Border width
 451             );
 452 #ifdef __WXMAC__
 453         // Put stretchable space between help button and others
 454         buttonRow->Add(0, 0, 1, wxALIGN_CENTRE, 0);
 455 #endif
 456     }
 457
 458     AddBackNextPair(buttonRow);
 459
 460     buttonRow->Add(
 461         btnCancel,
 462         0, // Horizontally unstretchable
 463         wxALL, // Border all around, top aligned
 464         5 // Border width
 465     );
 466 }
 467
 468 void wxWizard::DoCreateControls()
 469 {
 470     // do nothing if the controls were already created
 471     if ( WasCreated() )
 472         return;
 473
 474     bool isPda = (wxSystemSettings::GetScreenType() <= wxSYS_SCREEN_PDA);
 475
 476     // Horizontal stretching, and if not PDA, border all around
 477     int mainColumnSizerFlags = isPda ? wxEXPAND : wxALL|wxEXPAND ;
 478
 479     // wxWindow::SetSizer will be called at end
 480     wxBoxSizer *windowSizer = new wxBoxSizer(wxVERTICAL);
 481
 482     wxBoxSizer *mainColumn = new wxBoxSizer(wxVERTICAL);
 483     windowSizer->Add(
 484         mainColumn,
 485         1, // Vertical stretching
 486         mainColumnSizerFlags,
 487         5 // Border width
 488     );
 489
 490     AddBitmapRow(mainColumn);
 491
 492     if (!isPda)
 493         AddStaticLine(mainColumn);
 494
 495     AddButtonRow(mainColumn);
 496
 497     SetSizer(windowSizer);
 498 }
 499
 500 void wxWizard::SetPageSize(const wxSize& size)
 501 {
 502     wxCHECK_RET(!m_started, wxT("wxWizard::SetPageSize after RunWizard"));
 503     m_sizePage = size;
 504 }
 505
 506 void wxWizard::FitToPage(const wxWizardPage *page)
 507 {
 508     wxCHECK_RET(!m_started, wxT("wxWizard::FitToPage after RunWizard"));
 509
 510     while ( page )
 511     {
 512         wxSize size = page->GetBestSize();
 513
 514         m_sizePage.IncTo(size);
 515
 516         page = page->GetNext();
 517     }
 518 }
 519
 520 bool wxWizard::ShowPage(wxWizardPage *page, bool goingForward)
 521 {
 522     wxASSERT_MSG( page != m_page, wxT("this is useless") );
 523
 524     wxSizerFlags flags(1);
 525     flags.Border(wxALL, m_border).Expand();
 526
 527     if ( !m_started )
 528     {
 529         if ( m_usingSizer )
 530         {
 531             m_sizerBmpAndPage->Add(m_sizerPage, flags);
 532
 533             // now that our layout is computed correctly, hide the pages
 534             // artificially shown in wxWizardSizer::Insert() back again
 535             m_sizerPage->HidePages();
 536         }
 537     }
 538
 539
 540     // we'll use this to decide whether we have to change the label of this
 541     // button or not (initially the label is "Next")
 542     bool btnLabelWasNext = true;
 543
 544     // remember the old bitmap (if any) to compare with the new one later
 545     wxBitmap bmpPrev;
 546
 547     // check for previous page
 548     if ( m_page )
 549     {
 550         // send the event to the old page
 551         wxWizardEvent event(wxEVT_WIZARD_PAGE_CHANGING, GetId(),
 552                             goingForward, m_page);
 553         if ( m_page->GetEventHandler()->ProcessEvent(event) &&
 554              !event.IsAllowed() )
 555         {
 556             // vetoed by the page
 557             return false;
 558         }
 559
 560         m_page->Hide();
 561
 562         btnLabelWasNext = HasNextPage(m_page);
 563
 564         bmpPrev = m_page->GetBitmap();
 565
 566         if ( !m_usingSizer )
 567             m_sizerBmpAndPage->Detach(m_page);
 568     }
 569
 570     // set the new page
 571     m_page = page;
 572
 573     // is this the end?
 574     if ( !m_page )
 575     {
 576         // terminate successfully
 577         if ( IsModal() )
 578         {
 579             EndModal(wxID_OK);
 580         }
 581         else
 582         {
 583             SetReturnCode(wxID_OK);
 584             Hide();
 585         }
 586
 587         // and notify the user code (this is especially useful for modeless
 588         // wizards)
 589         wxWizardEvent event(wxEVT_WIZARD_FINISHED, GetId(), false, 0);
 590         (void)GetEventHandler()->ProcessEvent(event);
 591
 592         return true;
 593     }
 594
 595     // position and show the new page
 596     (void)m_page->TransferDataToWindow();
 597
 598     if ( m_usingSizer )
 599     {
 600         // wxWizardSizer::RecalcSizes wants to be called when m_page changes
 601         m_sizerPage->RecalcSizes();
 602     }
 603     else // pages are not managed by the sizer
 604     {
 605         m_sizerBmpAndPage->Add(m_page, flags);
 606         m_sizerBmpAndPage->SetItemMinSize(m_page, GetPageSize());
 607     }
 608
 609 #if wxUSE_STATBMP
 610     // update the bitmap if:it changed
 611     if ( m_statbmp )
 612     {
 613         wxBitmap bmp = m_page->GetBitmap();
 614         if ( !bmp.Ok() )
 615             bmp = m_bitmap;
 616
 617         if ( !bmpPrev.Ok() )
 618             bmpPrev = m_bitmap;
 619
 620         if ( !bmp.IsSameAs(bmpPrev) )
 621             m_statbmp->SetBitmap(bmp);
 622     }
 623 #endif // wxUSE_STATBMP
 624
 625
 626     // and update the buttons state
 627     m_btnPrev->Enable(HasPrevPage(m_page));
 628
 629     bool hasNext = HasNextPage(m_page);
 630     if ( btnLabelWasNext != hasNext )
 631     {
 632         if ( hasNext )
 633             m_btnNext->SetLabel(_("&Next >"));
 634         else
 635             m_btnNext->SetLabel(_("&Finish"));
 636     }
 637     // nothing to do: the label was already correct
 638
 639     m_btnNext->SetDefault();
 640
 641
 642     // send the change event to the new page now
 643     wxWizardEvent event(wxEVT_WIZARD_PAGE_CHANGED, GetId(), goingForward, m_page);
 644     (void)m_page->GetEventHandler()->ProcessEvent(event);
 645
 646     // and finally show it
 647     m_page->Show();
 648     m_page->SetFocus();
 649
 650     if ( !m_usingSizer )
 651         m_sizerBmpAndPage->Layout();
 652
 653     if ( !m_started )
 654     {
 655         m_started = true;
 656
 657         if ( wxSystemSettings::GetScreenType() > wxSYS_SCREEN_PDA )
 658         {
 659             GetSizer()->SetSizeHints(this);
 660             if ( m_posWizard == wxDefaultPosition )
 661                 CentreOnScreen();
 662         }
 663     }
 664
 665     return true;
 666 }
 667
 668 bool wxWizard::RunWizard(wxWizardPage *firstPage)
 669 {
 670     wxCHECK_MSG( firstPage, false, wxT("can't run empty wizard") );
 671
 672     // can't return false here because there is no old page
 673     (void)ShowPage(firstPage, true /* forward */);
 674
 675     m_wasModal = true;
 676
 677     return ShowModal() == wxID_OK;
 678 }
 679
 680 wxWizardPage *wxWizard::GetCurrentPage() const
 681 {
 682     return m_page;
 683 }
 684
 685 wxSize wxWizard::GetPageSize() const
 686 {
 687     // default width and height of the page
 688     int DEFAULT_PAGE_WIDTH,
 689         DEFAULT_PAGE_HEIGHT;
 690     if ( wxSystemSettings::GetScreenType() <= wxSYS_SCREEN_PDA )
 691     {
 692         // Make the default page size small enough to fit on screen
 693         DEFAULT_PAGE_WIDTH = wxSystemSettings::GetMetric(wxSYS_SCREEN_X) / 2;
 694         DEFAULT_PAGE_HEIGHT = wxSystemSettings::GetMetric(wxSYS_SCREEN_Y) / 2;
 695     }
 696     else // !PDA
 697     {
 698         DEFAULT_PAGE_WIDTH =
 699         DEFAULT_PAGE_HEIGHT = 270;
 700     }
 701
 702     // start with default minimal size
 703     wxSize pageSize(DEFAULT_PAGE_WIDTH, DEFAULT_PAGE_HEIGHT);
 704
 705     // make the page at least as big as specified by user
 706     pageSize.IncTo(m_sizePage);
 707
 708     if ( m_statbmp )
 709     {
 710         // make the page at least as tall as the bitmap
 711         pageSize.IncTo(wxSize(0, m_bitmap.GetHeight()));
 712     }
 713
 714     if ( m_usingSizer )
 715     {
 716         // make it big enough to contain all pages added to the sizer
 717         pageSize.IncTo(m_sizerPage->GetMaxChildSize());
 718     }
 719
 720     return pageSize;
 721 }
 722
 723 wxSizer *wxWizard::GetPageAreaSizer() const
 724 {
 725     return m_sizerPage;
 726 }
 727
 728 void wxWizard::SetBorder(int border)
 729 {
 730     wxCHECK_RET(!m_started, wxT("wxWizard::SetBorder after RunWizard"));
 731
 732     m_border = border;
 733 }
 734
 735 void wxWizard::OnCancel(wxCommandEvent& WXUNUSED(eventUnused))
 736 {
 737     // this function probably can never be called when we don't have an active
 738     // page, but a small extra check won't hurt
 739     wxWindow *win = m_page ? (wxWindow *)m_page : (wxWindow *)this;
 740
 741     wxWizardEvent event(wxEVT_WIZARD_CANCEL, GetId(), false, m_page);
 742     if ( !win->GetEventHandler()->ProcessEvent(event) || event.IsAllowed() )
 743     {
 744         // no objections - close the dialog
 745         if(IsModal())
 746         {
 747             EndModal(wxID_CANCEL);
 748         }
 749         else
 750         {
 751             SetReturnCode(wxID_CANCEL);
 752             Hide();
 753         }
 754     }
 755     //else: request to Cancel ignored
 756 }
 757
 758 void wxWizard::OnBackOrNext(wxCommandEvent& event)
 759 {
 760     wxASSERT_MSG( (event.GetEventObject() == m_btnNext) ||
 761                   (event.GetEventObject() == m_btnPrev),
 762                   wxT("unknown button") );
 763
 764     wxCHECK_RET( m_page, _T("should have a valid current page") );
 765
 766     // ask the current page first: notice that we do it before calling
 767     // GetNext/Prev() because the data transfered from the controls of the page
 768     // may change the value returned by these methods
 769     if ( !m_page->Validate() || !m_page->TransferDataFromWindow() )
 770     {
 771         // the page data is incorrect, don't do anything
 772         return;
 773     }
 774
 775     bool forward = event.GetEventObject() == m_btnNext;
 776
 777     wxWizardPage *page;
 778     if ( forward )
 779     {
 780         page = m_page->GetNext();
 781     }
 782     else // back
 783     {
 784         page = m_page->GetPrev();
 785
 786         wxASSERT_MSG( page, wxT("\"<Back\" button should have been disabled") );
 787     }
 788
 789     // just pass to the new page (or maybe not - but we don't care here)
 790     (void)ShowPage(page, forward);
 791 }
 792
 793 void wxWizard::OnHelp(wxCommandEvent& WXUNUSED(event))
 794 {
 795     // this function probably can never be called when we don't have an active
 796     // page, but a small extra check won't hurt
 797     if(m_page != NULL)
 798     {
 799         // Create and send the help event to the specific page handler
 800         // event data contains the active page so that context-sensitive
 801         // help is possible
 802         wxWizardEvent eventHelp(wxEVT_WIZARD_HELP, GetId(), true, m_page);
 803         (void)m_page->GetEventHandler()->ProcessEvent(eventHelp);
 804     }
 805 }
 806
 807 void wxWizard::OnWizEvent(wxWizardEvent& event)
 808 {
 809     // the dialogs have wxWS_EX_BLOCK_EVENTS style on by default but we want to
 810     // propagate wxEVT_WIZARD_XXX to the parent (if any), so do it manually
 811     if ( !(GetExtraStyle() & wxWS_EX_BLOCK_EVENTS) )
 812     {
 813         // the event will be propagated anyhow
 814         event.Skip();
 815     }
 816     else
 817     {
 818         wxWindow *parent = GetParent();
 819
 820         if ( !parent || !parent->GetEventHandler()->ProcessEvent(event) )
 821         {
 822             event.Skip();
 823         }
 824     }
 825
 826     if ( ( !m_wasModal ) &&
 827          event.IsAllowed() &&
 828          ( event.GetEventType() == wxEVT_WIZARD_FINISHED ||
 829            event.GetEventType() == wxEVT_WIZARD_CANCEL
 830          )
 831        )
 832     {
 833         Destroy();
 834     }
 835 }
 836
 837 // ----------------------------------------------------------------------------
 838 // wxWizardEvent
 839 // ----------------------------------------------------------------------------
 840
 841 wxWizardEvent::wxWizardEvent(wxEventType type, int id, bool direction, wxWizardPage* page)
 842              : wxNotifyEvent(type, id)
 843 {
 844     // Modified 10-20-2001 Robert Cavanaugh
 845     // add the active page to the event data
 846     m_direction = direction;
 847     m_page = page;
 848 }
 849
 850 #endif // wxUSE_WIZARDDLG