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