src/generic/wizard.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 // Created:     15.08.99
  10 // RCS-ID:      $Id$
  11 // Copyright:   (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
  12 // Licence:     wxWindows license
  13 ///////////////////////////////////////////////////////////////////////////////
  14
  15 // ============================================================================
  16 // declarations
  17 // ============================================================================
  18
  19 // ----------------------------------------------------------------------------
  20 // headers
  21 // ----------------------------------------------------------------------------
  22
  23 #ifdef __GNUG__
  24     #pragma implementation ".h"
  25 #endif
  26
  27 // For compilers that support precompilation, includes "wx.h".
  28 #include "wx/wxprec.h"
  29
  30 #ifdef __BORLANDC__
  31     #pragma hdrstop
  32 #endif
  33
  34 #if wxUSE_WIZARDDLG
  35
  36 #ifndef WX_PRECOMP
  37     #include "wx/dynarray.h"
  38     #include "wx/intl.h"
  39     #include "wx/statbmp.h"
  40     #include "wx/button.h"
  41 #endif //WX_PRECOMP
  42
  43 #include "wx/statline.h"
  44
  45 #include "wx/wizard.h"
  46
  47 // ----------------------------------------------------------------------------
  48 // simple types
  49 // ----------------------------------------------------------------------------
  50
  51 WX_DEFINE_ARRAY(wxPanel *, wxArrayPages);
  52
  53 // ----------------------------------------------------------------------------
  54 // event tables and such
  55 // ----------------------------------------------------------------------------
  56
  57 DEFINE_EVENT_TYPE(wxEVT_WIZARD_PAGE_CHANGED)
  58 DEFINE_EVENT_TYPE(wxEVT_WIZARD_PAGE_CHANGING)
  59 DEFINE_EVENT_TYPE(wxEVT_WIZARD_CANCEL)
  60 DEFINE_EVENT_TYPE(wxEVT_WIZARD_HELP)
  61
  62 BEGIN_EVENT_TABLE(wxWizard, wxDialog)
  63     EVT_BUTTON(wxID_CANCEL, wxWizard::OnCancel)
  64     EVT_BUTTON(wxID_BACKWARD, wxWizard::OnBackOrNext)
  65     EVT_BUTTON(wxID_FORWARD, wxWizard::OnBackOrNext)
  66     EVT_BUTTON(wxID_HELP, wxWizard::OnHelp)
  67 END_EVENT_TABLE()
  68
  69 IMPLEMENT_DYNAMIC_CLASS(wxWizard, wxDialog)
  70 IMPLEMENT_ABSTRACT_CLASS(wxWizardPage, wxPanel)
  71 IMPLEMENT_DYNAMIC_CLASS(wxWizardPageSimple, wxWizardPage)
  72 IMPLEMENT_DYNAMIC_CLASS(wxWizardEvent, wxNotifyEvent)
  73
  74 // ============================================================================
  75 // implementation
  76 // ============================================================================
  77
  78 // ----------------------------------------------------------------------------
  79 // wxWizardPage
  80 // ----------------------------------------------------------------------------
  81
  82 wxWizardPage::wxWizardPage(wxWizard *parent,
  83                            const wxBitmap& bitmap,
  84                            const wxChar *resource)
  85             : wxPanel(parent)
  86 {
  87     if ( resource != NULL )
  88     {
  89 #if wxUSE_RESOURCES
  90         if ( !LoadFromResource(this, resource) )
  91         {
  92             wxFAIL_MSG(wxT("wxWizardPage LoadFromResource failed!!!!"));
  93         }
  94 #endif // wxUSE_RESOURCES
  95     }
  96
  97     m_bitmap = bitmap;
  98
  99     // initially the page is hidden, it's shown only when it becomes current
 100     Hide();
 101 }
 102
 103 // ----------------------------------------------------------------------------
 104 // wxWizardPageSimple
 105 // ----------------------------------------------------------------------------
 106
 107 wxWizardPage *wxWizardPageSimple::GetPrev() const
 108 {
 109     return m_prev;
 110 }
 111
 112 wxWizardPage *wxWizardPageSimple::GetNext() const
 113 {
 114     return m_next;
 115 }
 116 // ----------------------------------------------------------------------------
 117 // generic wxWizard implementation
 118 // ----------------------------------------------------------------------------
 119
 120 void wxWizard::Init()
 121 {
 122     m_posWizard = wxDefaultPosition;
 123     m_page = (wxWizardPage *)NULL;
 124     m_btnPrev = m_btnNext = NULL;
 125     m_statbmp = NULL;
 126 }
 127
 128 bool wxWizard::Create(wxWindow *parent,
 129                    int id,
 130                    const wxString& title,
 131                    const wxBitmap& bitmap,
 132                    const wxPoint& pos)
 133 {
 134     m_posWizard = pos;
 135     m_bitmap = bitmap ;
 136
 137     // just create the dialog itself here, the controls will be created in
 138     // DoCreateControls() called later when we know our final size
 139     m_page = (wxWizardPage *)NULL;
 140     m_btnPrev = m_btnNext = NULL;
 141     m_statbmp = NULL;
 142
 143     return wxDialog::Create(parent, id, title, pos);
 144 }
 145
 146 void wxWizard::DoCreateControls()
 147 {
 148     // do nothing if the controls were already created
 149     if ( WasCreated() )
 150         return;
 151
 152     // constants defining the dialog layout
 153     // ------------------------------------
 154
 155     // these constants define the position of the upper left corner of the
 156     // bitmap or the page in the wizard
 157     static const int X_MARGIN = 10;
 158     static const int Y_MARGIN = 10;
 159
 160     // margin between the bitmap and the panel
 161     static const int BITMAP_X_MARGIN = 15;
 162
 163     // margin between the bitmap and the static line
 164     static const int BITMAP_Y_MARGIN = 15;
 165
 166     // margin between the static line and the buttons
 167     static const int SEPARATOR_LINE_MARGIN = 15;
 168
 169     // margin between "Next >" and "Cancel" buttons
 170     static const int BUTTON_MARGIN = 10;
 171
 172     // default width and height of the page
 173     static const int DEFAULT_PAGE_WIDTH = 270;
 174     static const int DEFAULT_PAGE_HEIGHT = 290;
 175
 176     // create controls
 177     // ---------------
 178
 179     wxSize sizeBtn = wxButton::GetDefaultSize();
 180
 181     // the global dialog layout is: a row of buttons at the bottom (aligned to
 182     // the right), the static line above them, the bitmap (if any) on the left
 183     // of the upper part of the dialog and the panel in the remaining space
 184     m_x = X_MARGIN;
 185     m_y = Y_MARGIN;
 186
 187     int defaultHeight;
 188     if ( m_bitmap.Ok() )
 189     {
 190         m_statbmp = new wxStaticBitmap(this, -1, m_bitmap, wxPoint(m_x, m_y));
 191
 192         m_x += m_bitmap.GetWidth() + BITMAP_X_MARGIN;
 193
 194         defaultHeight = m_bitmap.GetHeight();
 195     }
 196     else
 197     {
 198         m_statbmp = (wxStaticBitmap *)NULL;
 199
 200         defaultHeight = DEFAULT_PAGE_HEIGHT;
 201     }
 202
 203     // use default size if none given and also make sure that the dialog is
 204     // not less than the default size
 205     m_height = m_sizePage.y == -1 ? defaultHeight : m_sizePage.y;
 206     m_width = m_sizePage.x == -1 ? DEFAULT_PAGE_WIDTH : m_sizePage.x;
 207     if ( m_height < defaultHeight )
 208         m_height = defaultHeight;
 209     if ( m_width < DEFAULT_PAGE_WIDTH )
 210         m_width = DEFAULT_PAGE_WIDTH;
 211
 212     int x = X_MARGIN;
 213     int y = m_y + m_height + BITMAP_Y_MARGIN;
 214
 215 #if wxUSE_STATLINE
 216     (void)new wxStaticLine(this, -1, wxPoint(x, y),
 217                            wxSize(m_x + m_width - x, 2));
 218 #endif // wxUSE_STATLINE
 219
 220     x = m_x + m_width - 3*sizeBtn.x - BUTTON_MARGIN;
 221     y += SEPARATOR_LINE_MARGIN;
 222
 223     if (GetExtraStyle() & wxWIZARD_EX_HELPBUTTON)
 224     {
 225         x -= sizeBtn.x;
 226         x -= BUTTON_MARGIN ;
 227
 228         (void)new wxButton(this, wxID_HELP, _("&Help"), wxPoint(x, y), sizeBtn);
 229         x += sizeBtn.x;
 230         x += BUTTON_MARGIN ;
 231     }
 232
 233     m_btnPrev = new wxButton(this, wxID_BACKWARD, _("< &Back"), wxPoint(x, y), sizeBtn);
 234
 235     x += sizeBtn.x;
 236     m_btnNext = new wxButton(this, wxID_FORWARD, _("&Next >"), wxPoint(x, y), sizeBtn);
 237
 238     x += sizeBtn.x + BUTTON_MARGIN;
 239     (void)new wxButton(this, wxID_CANCEL, _("&Cancel"), wxPoint(x, y), sizeBtn);
 240
 241     // position and size the dialog
 242     // ----------------------------
 243
 244     SetClientSize(m_x + m_width + X_MARGIN,
 245                   m_y + m_height + BITMAP_Y_MARGIN +
 246                     SEPARATOR_LINE_MARGIN + sizeBtn.y + Y_MARGIN);
 247
 248     if ( m_posWizard == wxDefaultPosition )
 249     {
 250         CentreOnScreen();
 251     }
 252 }
 253
 254 void wxWizard::SetPageSize(const wxSize& size)
 255 {
 256     // otherwise it will have no effect now as it's too late...
 257     wxASSERT_MSG( !WasCreated(), _T("should be called before RunWizard()!") );
 258
 259     m_sizePage = size;
 260 }
 261
 262 bool wxWizard::ShowPage(wxWizardPage *page, bool goingForward)
 263 {
 264     wxASSERT_MSG( page != m_page, wxT("this is useless") );
 265
 266     // we'll use this to decide whether we have to change the label of this
 267     // button or not (initially the label is "Next")
 268     bool btnLabelWasNext = TRUE;
 269
 270     // Modified 10-20-2001 Robert Cavanaugh.
 271     // Fixed bug for displaying a new bitmap
 272     // in each *consecutive* page
 273
 274     // flag to indicate if this page uses a new bitmap
 275     bool bmpIsDefault = TRUE;
 276
 277     // use these labels to determine if we need to change the bitmap
 278     // for this page
 279     wxBitmap   PreviousBitmap = wxNullBitmap;
 280     wxBitmap   ThisBitmap = wxNullBitmap;
 281
 282     // check for previous page
 283     if ( m_page )
 284     {
 285         // send the event to the old page
 286         wxWizardEvent event(wxEVT_WIZARD_PAGE_CHANGING, GetId(), goingForward);
 287         if ( m_page->GetEventHandler()->ProcessEvent(event) &&
 288              !event.IsAllowed() )
 289         {
 290             // vetoed by the page
 291             return FALSE;
 292         }
 293
 294         m_page->Hide();
 295
 296         btnLabelWasNext = m_page->GetNext() != (wxWizardPage *)NULL;
 297
 298         // Get the bitmap of the previous page (if it exists)
 299         if(m_page->GetBitmap().Ok())
 300     {
 301             PreviousBitmap = m_page->GetBitmap();
 302         }
 303     }
 304
 305     // set the new page
 306     m_page = page;
 307
 308     // is this the end?
 309     if ( !m_page )
 310     {
 311         // terminate successfully
 312         EndModal(wxID_OK);
 313         return TRUE;
 314     }
 315
 316     // send the change event to the new page now
 317     wxWizardEvent event(wxEVT_WIZARD_PAGE_CHANGED, GetId(), goingForward);
 318     (void)m_page->GetEventHandler()->ProcessEvent(event);
 319
 320     // position and show the new page
 321     (void)m_page->TransferDataToWindow();
 322     m_page->SetSize(m_x, m_y, m_width, m_height);
 323     m_page->Show();
 324
 325     // check if bitmap needs to be updated
 326     // update default flag as well
 327     if(m_page->GetBitmap().Ok())
 328     {
 329         ThisBitmap = m_page->GetBitmap();
 330         bmpIsDefault = FALSE;
 331     }
 332
 333     // change the bitmap if:
 334     // 1) a default bitmap was selected in constructor
 335     // 2) this page was constructed with a bitmap
 336     // 3) this bitmap is not the previous bitmap
 337     if( m_statbmp && (ThisBitmap != PreviousBitmap) )
 338     {
 339         wxBitmap bmp;
 340         if ( bmpIsDefault )
 341             bmp = m_bitmap;
 342         else
 343             bmp = m_page->GetBitmap();
 344         m_statbmp->SetBitmap(bmp);
 345     }
 346
 347     // and update the buttons state
 348     m_btnPrev->Enable(m_page->GetPrev() != (wxWizardPage *)NULL);
 349
 350     bool hasNext = m_page->GetNext() != (wxWizardPage *)NULL;
 351     if ( btnLabelWasNext != hasNext )
 352     {
 353         // need to update
 354         if (btnLabelWasNext)
 355             m_btnNext->SetLabel(_("&Finish"));
 356         else
 357             m_btnNext->SetLabel(_("&Next >"));
 358     }
 359     // nothing to do: the label was already correct
 360
 361     return TRUE;
 362 }
 363
 364 bool wxWizard::RunWizard(wxWizardPage *firstPage)
 365 {
 366     wxCHECK_MSG( firstPage, FALSE, wxT("can't run empty wizard") );
 367
 368     DoCreateControls();
 369
 370     // can't return FALSE here because there is no old page
 371     (void)ShowPage(firstPage, TRUE /* forward */);
 372
 373     return ShowModal() == wxID_OK;
 374 }
 375
 376 wxWizardPage *wxWizard::GetCurrentPage() const
 377 {
 378     return m_page;
 379 }
 380
 381 wxSize wxWizard::GetPageSize() const
 382 {
 383     // make sure that the controls are created because otherwise m_width and
 384     // m_height would be both still -1
 385     wxConstCast(this, wxWizard)->DoCreateControls();
 386
 387     return wxSize(m_width, m_height);
 388 }
 389
 390 void wxWizard::OnCancel(wxCommandEvent& WXUNUSED(event))
 391 {
 392     // this function probably can never be called when we don't have an active
 393     // page, but a small extra check won't hurt
 394     wxWindow *win = m_page ? (wxWindow *)m_page : (wxWindow *)this;
 395
 396     wxWizardEvent event(wxEVT_WIZARD_CANCEL, GetId());
 397     if ( !win->GetEventHandler()->ProcessEvent(event) || event.IsAllowed() )
 398     {
 399         // no objections - close the dialog
 400         EndModal(wxID_CANCEL);
 401     }
 402     //else: request to Cancel ignored
 403 }
 404
 405 void wxWizard::OnBackOrNext(wxCommandEvent& event)
 406 {
 407     wxASSERT_MSG( (event.GetEventObject() == m_btnNext) ||
 408                   (event.GetEventObject() == m_btnPrev),
 409                   wxT("unknown button") );
 410
 411     // ask the current page first: notice that we do it before calling
 412     // GetNext/Prev() because the data transfered from the controls of the page
 413     // may change the value returned by these methods
 414     if ( m_page && !m_page->TransferDataFromWindow() )
 415     {
 416         // the page data is incorrect, don't do anything
 417         return;
 418     }
 419
 420     bool forward = event.GetEventObject() == m_btnNext;
 421
 422     wxWizardPage *page;
 423     if ( forward )
 424     {
 425         page = m_page->GetNext();
 426     }
 427     else // back
 428     {
 429         page = m_page->GetPrev();
 430
 431         wxASSERT_MSG( page, wxT("\"<Back\" button should have been disabled") );
 432     }
 433
 434     // just pass to the new page (or may be not - but we don't care here)
 435     (void)ShowPage(page, forward);
 436 }
 437
 438 void wxWizard::OnHelp(wxCommandEvent& WXUNUSED(event))
 439 {
 440     // this function probably can never be called when we don't have an active
 441     // page, but a small extra check won't hurt
 442     if(m_page != NULL)
 443     {
 444         // Create and send the help event to the specific page handler
 445         // event data contains the active page so that context-sensitive
 446         // help is possible
 447         wxWizardEvent eventHelp(wxEVT_WIZARD_HELP, GetId(), TRUE, m_page);
 448         (void)m_page->GetEventHandler()->ProcessEvent(eventHelp);
 449     }
 450 }
 451
 452
 453 // ----------------------------------------------------------------------------
 454 // our public interface
 455 // ----------------------------------------------------------------------------
 456
 457 /* static */
 458 wxWizard *wxWizardBase::Create(wxWindow *parent,
 459                                int id,
 460                                const wxString& title,
 461                                const wxBitmap& bitmap,
 462                                const wxPoint& pos,
 463                                const wxSize& WXUNUSED(size))
 464 {
 465     return new wxWizard(parent, id, title, bitmap, pos);
 466 }
 467
 468 // ----------------------------------------------------------------------------
 469 // wxWizardEvent
 470 // ----------------------------------------------------------------------------
 471
 472 wxWizardEvent::wxWizardEvent(wxEventType type, int id, bool direction, wxWizardPage* page)
 473              : wxNotifyEvent(type, id)
 474 {
 475     // Modified 10-20-2001 Robert Cavanaugh
 476     // add the active page to the event data
 477     m_direction = direction;
 478     m_page = page;
 479 }
 480
 481 #endif // wxUSE_WIZARDDLG