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