src/common/prntbase.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        prntbase.cpp
   3 // Purpose:     Printing framework base class implementation
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:       wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "prntbase.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #include "wx/defs.h"
  24
  25 #if wxUSE_PRINTING_ARCHITECTURE
  26
  27 #ifndef WX_PRECOMP
  28 #include "wx/utils.h"
  29 #include "wx/dc.h"
  30 #include "wx/app.h"
  31 #include "wx/msgdlg.h"
  32 #include "wx/layout.h"
  33 #include "wx/choice.h"
  34 #include "wx/button.h"
  35 #include "wx/settings.h"
  36 #include "wx/dcmemory.h"
  37 #include "wx/stattext.h"
  38 #include "wx/intl.h"
  39 #endif
  40
  41 #include "wx/prntbase.h"
  42 #include "wx/dcprint.h"
  43 #include "wx/printdlg.h"
  44 #include "wx/module.h"
  45
  46 #include <stdlib.h>
  47 #include <string.h>
  48
  49 #ifdef __WXMSW__
  50     #include "wx/msw/private.h"
  51     #include <commdlg.h>
  52
  53     #ifndef __WIN32__
  54         #include <print.h>
  55     #endif
  56 #endif // __WXMSW__
  57
  58 IMPLEMENT_CLASS(wxPrinterBase, wxObject)
  59 IMPLEMENT_ABSTRACT_CLASS(wxPrintout, wxObject)
  60 IMPLEMENT_CLASS(wxPreviewCanvas, wxWindow)
  61 IMPLEMENT_CLASS(wxPreviewControlBar, wxWindow)
  62 IMPLEMENT_CLASS(wxPreviewFrame, wxFrame)
  63 IMPLEMENT_CLASS(wxPrintPreviewBase, wxObject)
  64
  65 BEGIN_EVENT_TABLE(wxPrintAbortDialog, wxDialog)
  66     EVT_BUTTON(wxID_CANCEL, wxPrintAbortDialog::OnCancel)
  67 END_EVENT_TABLE()
  68
  69 BEGIN_EVENT_TABLE(wxPreviewCanvas, wxScrolledWindow)
  70     EVT_PAINT(wxPreviewCanvas::OnPaint)
  71     EVT_SYS_COLOUR_CHANGED(wxPreviewCanvas::OnSysColourChanged)
  72 END_EVENT_TABLE()
  73
  74 /*
  75 * Printer
  76 */
  77
  78 wxPrinterBase::wxPrinterBase(wxPrintDialogData *data)
  79 {
  80     m_currentPrintout = (wxPrintout *) NULL;
  81     sm_abortWindow = (wxWindow *) NULL;
  82     sm_abortIt = FALSE;
  83     if (data)
  84         m_printDialogData = (*data);
  85 }
  86
  87 wxWindow *wxPrinterBase::sm_abortWindow = (wxWindow *) NULL;
  88 bool wxPrinterBase::sm_abortIt = FALSE;
  89
  90 wxPrinterBase::~wxPrinterBase()
  91 {
  92 }
  93
  94 void wxPrintAbortDialog::OnCancel(wxCommandEvent& WXUNUSED(event))
  95 {
  96     wxPrinterBase::sm_abortIt = TRUE;
  97     wxPrinterBase::sm_abortWindow->Show(FALSE);
  98     wxPrinterBase::sm_abortWindow->Close(TRUE);
  99     wxPrinterBase::sm_abortWindow = (wxWindow *) NULL;
 100 }
 101
 102 wxWindow *wxPrinterBase::CreateAbortWindow(wxWindow *parent, wxPrintout *WXUNUSED(printout))
 103 {
 104     wxPrintAbortDialog *dialog = new wxPrintAbortDialog(parent, _("Printing"), wxPoint(0, 0), wxSize(400, 400), wxDEFAULT_DIALOG_STYLE);
 105     (void) new wxStaticText(dialog, -1, _("Please wait..."), wxPoint(5, 5));
 106
 107     wxButton *button = new wxButton(dialog, wxID_CANCEL, _("Cancel"), wxPoint(5, 30));
 108
 109     dialog->Fit();
 110     button->Centre(wxHORIZONTAL);
 111
 112     dialog->Centre();
 113     return dialog;
 114 }
 115
 116 void wxPrinterBase::ReportError(wxWindow *parent, wxPrintout *WXUNUSED(printout), char *message)
 117 {
 118     wxMessageBox(message, _("Printing Error"), wxOK, parent);
 119 }
 120
 121 /*
 122 * Printout class
 123 */
 124
 125 wxPrintout::wxPrintout(const wxString& title)
 126 {
 127     m_printoutTitle = title ;
 128     m_printoutDC = (wxDC *) NULL;
 129     m_pageWidthMM = 0;
 130     m_pageHeightMM = 0;
 131     m_pageWidthPixels = 0;
 132     m_pageHeightPixels = 0;
 133     m_PPIScreenX = 0;
 134     m_PPIScreenY = 0;
 135     m_PPIPrinterX = 0;
 136     m_PPIPrinterY = 0;
 137     m_isPreview = FALSE;
 138 }
 139
 140 wxPrintout::~wxPrintout()
 141 {
 142 }
 143
 144 bool wxPrintout::OnBeginDocument(int WXUNUSED(startPage), int WXUNUSED(endPage))
 145 {
 146     return GetDC()->StartDoc(_("Printing"));
 147 }
 148
 149 void wxPrintout::OnEndDocument()
 150 {
 151     GetDC()->EndDoc();
 152 }
 153
 154 void wxPrintout::OnBeginPrinting()
 155 {
 156 }
 157
 158 void wxPrintout::OnEndPrinting()
 159 {
 160 }
 161
 162 bool wxPrintout::HasPage(int page)
 163 {
 164     return (page == 1);
 165 }
 166
 167 void wxPrintout::GetPageInfo(int *minPage, int *maxPage, int *fromPage, int *toPage)
 168 {
 169     *minPage = 1;
 170     *maxPage = 32000;
 171     *fromPage = 1;
 172     *toPage = 1;
 173 }
 174
 175 /*
 176 * Preview canvas
 177 */
 178
 179 wxPreviewCanvas::wxPreviewCanvas(wxPrintPreviewBase *preview, wxWindow *parent,
 180                                  const wxPoint& pos, const wxSize& size, long style, const wxString& name):
 181 wxScrolledWindow(parent, -1, pos, size, style, name)
 182 {
 183     m_printPreview = preview;
 184     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE));
 185
 186     SetScrollbars(15, 18, 100, 100);
 187 }
 188
 189 wxPreviewCanvas::~wxPreviewCanvas()
 190 {
 191 }
 192
 193 void wxPreviewCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))
 194 {
 195     wxPaintDC dc(this);
 196     PrepareDC( dc );
 197
 198     if (m_printPreview)
 199     {
 200         m_printPreview->PaintPage(this, dc);
 201     }
 202 }
 203
 204 // Responds to colour changes, and passes event on to children.
 205 void wxPreviewCanvas::OnSysColourChanged(wxSysColourChangedEvent& event)
 206 {
 207     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE));
 208     Refresh();
 209
 210     // Propagate the event to the non-top-level children
 211     wxWindow::OnSysColourChanged(event);
 212 }
 213
 214 /*
 215 * Preview control bar
 216 */
 217
 218 BEGIN_EVENT_TABLE(wxPreviewControlBar, wxPanel)
 219     EVT_BUTTON(wxID_PREVIEW_CLOSE,    wxPreviewControlBar::OnWindowClose)
 220     EVT_BUTTON(wxID_PREVIEW_PRINT,    wxPreviewControlBar::OnPrint)
 221     EVT_BUTTON(wxID_PREVIEW_PREVIOUS, wxPreviewControlBar::OnPreviousButton)
 222     EVT_BUTTON(wxID_PREVIEW_NEXT,     wxPreviewControlBar::OnNextButton)
 223     EVT_CHAR(wxPreviewControlBar::OnChar)
 224     EVT_CHOICE(wxID_PREVIEW_ZOOM,     wxPreviewControlBar::OnZoom)
 225     EVT_PAINT(wxPreviewControlBar::OnPaint)
 226 END_EVENT_TABLE()
 227
 228 wxPreviewControlBar::wxPreviewControlBar(wxPrintPreviewBase *preview, long buttons,
 229                                          wxWindow *parent, const wxPoint& pos, const wxSize& size,
 230                                          long style, const wxString& name):
 231 wxPanel(parent, -1, pos, size, style, name)
 232 {
 233     m_printPreview = preview;
 234     m_closeButton = (wxButton *) NULL;
 235     m_nextPageButton = (wxButton *) NULL;
 236     m_previousPageButton = (wxButton *) NULL;
 237     m_printButton = (wxButton *) NULL;
 238     m_zoomControl = (wxChoice *) NULL;
 239     m_buttonFlags = buttons;
 240 }
 241
 242 wxPreviewControlBar::~wxPreviewControlBar()
 243 {
 244 }
 245
 246 void wxPreviewControlBar::OnPaint(wxPaintEvent& WXUNUSED(event))
 247 {
 248     wxPaintDC dc(this);
 249
 250     int w, h;
 251     GetSize(&w, &h);
 252     dc.SetPen(*wxBLACK_PEN);
 253     dc.SetBrush(*wxTRANSPARENT_BRUSH);
 254     dc.DrawLine( 0, h-1, w, h-1 );
 255 }
 256
 257 void wxPreviewControlBar::OnWindowClose(wxCommandEvent& WXUNUSED(event))
 258 {
 259     wxPreviewFrame *frame = (wxPreviewFrame *)GetParent();
 260     frame->Close(TRUE);
 261 }
 262
 263 void wxPreviewControlBar::OnPrint(wxCommandEvent& WXUNUSED(event))
 264 {
 265     wxPrintPreviewBase *preview = GetPrintPreview();
 266     preview->Print(TRUE);
 267 }
 268
 269 void wxPreviewControlBar::OnChar(wxKeyEvent &event)
 270 {
 271    switch(event.KeyCode())
 272    {
 273    case WXK_NEXT:
 274       OnNext(); break;
 275    case WXK_PRIOR:
 276       OnPrevious(); break;
 277    default:
 278       event.Skip();
 279    }
 280 }
 281
 282 void wxPreviewControlBar::OnNext(void)
 283 {
 284     wxPrintPreviewBase *preview = GetPrintPreview();
 285     if (preview)
 286     {
 287         int currentPage = preview->GetCurrentPage();
 288         if ((preview->GetMaxPage() > 0) &&
 289             (currentPage < preview->GetMaxPage()) &&
 290             preview->GetPrintout()->HasPage(currentPage + 1))
 291         {
 292             preview->SetCurrentPage(currentPage + 1);
 293         }
 294     }
 295 }
 296
 297 void wxPreviewControlBar::OnPrevious(void)
 298 {
 299     wxPrintPreviewBase *preview = GetPrintPreview();
 300     if (preview)
 301     {
 302         int currentPage = preview->GetCurrentPage();
 303         if ((preview->GetMinPage() > 0) &&
 304             (currentPage > preview->GetMinPage()) &&
 305             preview->GetPrintout()->HasPage(currentPage - 1))
 306         {
 307             preview->SetCurrentPage(currentPage - 1);
 308         }
 309     }
 310 }
 311
 312 void wxPreviewControlBar::OnZoom(wxCommandEvent& WXUNUSED(event))
 313 {
 314     int zoom = GetZoomControl();
 315     if (GetPrintPreview())
 316         GetPrintPreview()->SetZoom(zoom);
 317 }
 318
 319 void wxPreviewControlBar::CreateButtons()
 320 {
 321     SetSize(0, 0, 400, 40);
 322
 323     /*
 324     #ifdef __WXMSW__
 325     int fontSize = 9;
 326     #else
 327     int fontSize = 10;
 328     #endif
 329
 330       wxFont buttonFont(fontSize, wxSWISS, wxNORMAL, wxBOLD);
 331       SetFont(buttonFont);
 332     */
 333
 334     int buttonWidth = 65;
 335 #ifdef __WXGTK__
 336     int buttonHeight = -1;
 337 #else
 338     int buttonHeight = 24;
 339 #endif
 340
 341     int x = 5;
 342     int y = 5;
 343
 344 #ifdef __WXMOTIF__
 345     int gap = 15;
 346 #else
 347     int gap = 5;
 348 #endif
 349
 350     m_closeButton = new wxButton(this, wxID_PREVIEW_CLOSE, _("Close"),
 351         wxPoint(x, y), wxSize(buttonWidth, buttonHeight));
 352
 353     x += gap + buttonWidth;
 354
 355     if (m_buttonFlags & wxPREVIEW_PRINT)
 356     {
 357         m_printButton =  new wxButton(this, wxID_PREVIEW_PRINT, _("Print..."), wxPoint(x, y),
 358             wxSize(buttonWidth, buttonHeight));
 359         x += gap + buttonWidth;
 360     }
 361
 362     if (m_buttonFlags & wxPREVIEW_PREVIOUS)
 363     {
 364         m_previousPageButton = new wxButton(this, wxID_PREVIEW_PREVIOUS, wxT("<<"), wxPoint(x, y),
 365             wxSize(buttonWidth, buttonHeight));
 366         x += gap + buttonWidth;
 367     }
 368
 369     if (m_buttonFlags & wxPREVIEW_NEXT)
 370     {
 371         m_nextPageButton = new wxButton(this, wxID_PREVIEW_NEXT, wxT(">>"),
 372             wxPoint(x, y), wxSize(buttonWidth, buttonHeight));
 373         x += gap + buttonWidth;
 374     }
 375
 376     if (m_buttonFlags & wxPREVIEW_ZOOM)
 377     {
 378         static const char *choices[] =
 379         {
 380             "10%", "15%", "20%", "25%", "30%", "35%", "40%", "45%", "50%", "55%",
 381             "60%", "65%", "70%", "75%", "80%", "85%", "90%", "95%", "100%", "110%",
 382             "120%", "150%", "200%"
 383         };
 384
 385         int n = WXSIZEOF(choices);
 386
 387         wxString* strings = new wxString[n];
 388         int i;
 389         for (i = 0; i < n; i++ )
 390            strings[i] = choices[i];
 391
 392         m_zoomControl = new wxChoice(this, wxID_PREVIEW_ZOOM,
 393                                      wxPoint(x, y),
 394                                      wxSize(100, -1),
 395                                      n,
 396                                      strings
 397                                     );
 398         delete[] strings;
 399
 400         SetZoomControl(m_printPreview->GetZoom());
 401     }
 402
 403     //  m_closeButton->SetDefault();
 404 }
 405
 406 void wxPreviewControlBar::SetZoomControl(int zoom)
 407 {
 408     char buf[20];
 409     sprintf(buf, "%d%%", zoom);
 410 // Someone is calling methods that do no exist in wxChoice!! So I'll just comment out for VA for now
 411     if (m_zoomControl)
 412         m_zoomControl->SetStringSelection(buf);
 413 }
 414
 415 int wxPreviewControlBar::GetZoomControl()
 416 {
 417     wxChar buf[20];
 418     if (m_zoomControl && (m_zoomControl->GetStringSelection() != wxT("")))
 419     {
 420         wxStrcpy(buf, m_zoomControl->GetStringSelection());
 421         buf[wxStrlen(buf) - 1] = 0;
 422         return (int)wxAtoi(buf);
 423     }
 424     else return 0;
 425 }
 426
 427
 428 /*
 429 * Preview frame
 430 */
 431
 432 BEGIN_EVENT_TABLE(wxPreviewFrame, wxFrame)
 433     EVT_CLOSE(wxPreviewFrame::OnCloseWindow)
 434 END_EVENT_TABLE()
 435
 436 wxPreviewFrame::wxPreviewFrame(wxPrintPreviewBase *preview, wxFrame *parent, const wxString& title,
 437                                const wxPoint& pos, const wxSize& size, long style, const wxString& name):
 438 wxFrame(parent, -1, title, pos, size, style, name)
 439 {
 440     m_printPreview = preview;
 441     m_controlBar = NULL;
 442     m_previewCanvas = NULL;
 443 }
 444
 445 wxPreviewFrame::~wxPreviewFrame()
 446 {
 447 }
 448
 449 void wxPreviewFrame::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 450 {
 451     MakeModal(FALSE);
 452
 453     // Need to delete the printout and the print preview
 454     wxPrintout *printout = m_printPreview->GetPrintout();
 455     if (printout)
 456     {
 457         delete printout;
 458         m_printPreview->SetPrintout(NULL);
 459         m_printPreview->SetCanvas(NULL);
 460         m_printPreview->SetFrame(NULL);
 461     }
 462     delete m_printPreview;
 463
 464     Destroy();
 465 }
 466
 467 void wxPreviewFrame::Initialize()
 468 {
 469     CreateStatusBar();
 470
 471     CreateCanvas();
 472     CreateControlBar();
 473
 474     m_printPreview->SetCanvas(m_previewCanvas);
 475     m_printPreview->SetFrame(this);
 476
 477     // Set layout constraints here
 478
 479     // Control bar constraints
 480     wxLayoutConstraints *c1 = new wxLayoutConstraints;
 481     //  int w, h;
 482     //  m_controlBar->GetSize(&w, &h);
 483     int h;
 484 #if (defined(__WXMSW__) || defined(__WXGTK__))
 485     h = 40;
 486 #else
 487     h = 60;
 488 #endif
 489
 490     c1->left.SameAs       (this, wxLeft);
 491     c1->top.SameAs        (this, wxTop);
 492     c1->right.SameAs      (this, wxRight);
 493     c1->height.Absolute   (h);
 494
 495     m_controlBar->SetConstraints(c1);
 496
 497     // Canvas constraints
 498     wxLayoutConstraints *c2 = new wxLayoutConstraints;
 499
 500     c2->left.SameAs       (this, wxLeft);
 501     c2->top.Below         (m_controlBar);
 502     c2->right.SameAs      (this, wxRight);
 503     c2->bottom.SameAs     (this, wxBottom);
 504
 505     m_previewCanvas->SetConstraints(c2);
 506
 507     SetAutoLayout(TRUE);
 508
 509     MakeModal(TRUE);
 510
 511     Layout();
 512 }
 513
 514 void wxPreviewFrame::CreateCanvas()
 515 {
 516     m_previewCanvas = new wxPreviewCanvas(m_printPreview, this);
 517 }
 518
 519 void wxPreviewFrame::CreateControlBar()
 520 {
 521     long buttons = wxPREVIEW_DEFAULT;
 522     if (m_printPreview->GetPrintoutForPrinting())
 523         buttons |= wxPREVIEW_PRINT;
 524
 525     m_controlBar = new wxPreviewControlBar(m_printPreview, buttons, this, wxPoint(0, 0), wxSize(400, 40));
 526     m_controlBar->CreateButtons();
 527 }
 528
 529 /*
 530 * Print preview
 531 */
 532
 533 wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout,
 534                                        wxPrintout *printoutForPrinting,
 535                                        wxPrintData *data)
 536 {
 537     if (data)
 538         m_printDialogData = (*data);
 539
 540     Init(printout, printoutForPrinting);
 541 }
 542
 543 wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout,
 544                                        wxPrintout *printoutForPrinting,
 545                                        wxPrintDialogData *data)
 546 {
 547     if (data)
 548         m_printDialogData = (*data);
 549
 550     Init(printout, printoutForPrinting);
 551 }
 552
 553 void wxPrintPreviewBase::Init(wxPrintout *printout,
 554                               wxPrintout *printoutForPrinting)
 555 {
 556     m_isOk = TRUE;
 557     m_previewPrintout = printout;
 558     if (m_previewPrintout)
 559         m_previewPrintout->SetIsPreview(TRUE);
 560
 561     m_printPrintout = printoutForPrinting;
 562
 563     m_previewCanvas = NULL;
 564     m_previewFrame = NULL;
 565     m_previewBitmap = NULL;
 566     m_currentPage = 1;
 567     m_currentZoom = 70;
 568     m_topMargin = 40;
 569     m_leftMargin = 40;
 570     m_pageWidth = 0;
 571     m_pageHeight = 0;
 572     m_printingPrepared = FALSE;
 573
 574     // Too soon! Moved to RenderPage.
 575     // printout->OnPreparePrinting();
 576
 577     // Get some parameters from the printout, if defined
 578     int selFrom, selTo;
 579     printout->GetPageInfo(&m_minPage, &m_maxPage, &selFrom, &selTo);
 580 }
 581
 582 wxPrintPreviewBase::~wxPrintPreviewBase()
 583 {
 584     if (m_previewPrintout)
 585         delete m_previewPrintout;
 586     if (m_previewBitmap)
 587         delete m_previewBitmap;
 588     if (m_printPrintout)
 589         delete m_printPrintout;
 590 }
 591
 592 bool wxPrintPreviewBase::SetCurrentPage(int pageNum)
 593 {
 594     if (m_currentPage == pageNum)
 595         return TRUE;
 596
 597     m_currentPage = pageNum;
 598     if (m_previewBitmap)
 599     {
 600         delete m_previewBitmap;
 601         m_previewBitmap = NULL;
 602     }
 603
 604     if (m_previewCanvas)
 605     {
 606         RenderPage(pageNum);
 607         m_previewCanvas->Refresh();
 608     }
 609     return TRUE;
 610 }
 611
 612 bool wxPrintPreviewBase::PaintPage(wxWindow *canvas, wxDC& dc)
 613 {
 614     DrawBlankPage(canvas, dc);
 615
 616     if (!m_previewBitmap)
 617         RenderPage(m_currentPage);
 618
 619     if (!m_previewBitmap)
 620         return FALSE;
 621
 622     if (!canvas)
 623         return FALSE;
 624
 625     int canvasWidth, canvasHeight;
 626     canvas->GetSize(&canvasWidth, &canvasHeight);
 627
 628     double zoomScale = ((float)m_currentZoom/(float)100);
 629     double actualWidth = (zoomScale*m_pageWidth*m_previewScale);
 630     //  float actualHeight = (float)(zoomScale*m_pageHeight*m_previewScale);
 631
 632     int x = (int) ((canvasWidth - actualWidth)/2.0);
 633     if (x < m_leftMargin)
 634         x = m_leftMargin;
 635     int y = m_topMargin;
 636
 637     wxMemoryDC temp_dc;
 638     temp_dc.SelectObject(*m_previewBitmap);
 639
 640     dc.Blit(x, y, m_previewBitmap->GetWidth(), m_previewBitmap->GetHeight(), &temp_dc, 0, 0);
 641
 642     temp_dc.SelectObject(wxNullBitmap);
 643
 644     return TRUE;
 645 }
 646
 647 bool wxPrintPreviewBase::RenderPage(int pageNum)
 648 {
 649     int canvasWidth, canvasHeight;
 650
 651     if (!m_previewCanvas)
 652     {
 653         wxMessageBox(_("wxPrintPreviewBase::RenderPage: must use wxPrintPreviewBase::SetCanvas to let me know about the canvas!"),
 654             _("Print Preview Failure"), wxOK);
 655         return FALSE;
 656     }
 657     m_previewCanvas->GetSize(&canvasWidth, &canvasHeight);
 658
 659     double zoomScale = (m_currentZoom/100.0);
 660     int actualWidth = (int)(zoomScale*m_pageWidth*m_previewScale);
 661     int actualHeight = (int)(zoomScale*m_pageHeight*m_previewScale);
 662
 663     int x = (int)((canvasWidth - actualWidth)/2.0);
 664     if (x < m_leftMargin)
 665         x = m_leftMargin;
 666     //  int y = m_topMargin;
 667
 668
 669     if (!m_previewBitmap)
 670     {
 671         m_previewBitmap = new wxBitmap((int)actualWidth, (int)actualHeight);
 672         if (!m_previewBitmap || !m_previewBitmap->Ok())
 673         {
 674             if (m_previewBitmap)
 675                 delete m_previewBitmap;
 676             wxMessageBox(_("Sorry, not enough memory to create a preview."), _("Print Preview Failure"), wxOK);
 677             return FALSE;
 678         }
 679     }
 680
 681     wxMemoryDC memoryDC;
 682     memoryDC.SelectObject(*m_previewBitmap);
 683
 684     memoryDC.Clear();
 685
 686     m_previewPrintout->SetDC(&memoryDC);
 687     m_previewPrintout->SetPageSizePixels(m_pageWidth, m_pageHeight);
 688
 689     // Need to delay OnPreparePrinting until here, so we have enough information.
 690     if (!m_printingPrepared)
 691     {
 692         m_previewPrintout->OnPreparePrinting();
 693         m_printingPrepared = TRUE;
 694     }
 695
 696     m_previewPrintout->OnBeginPrinting();
 697
 698     if (!m_previewPrintout->OnBeginDocument(m_printDialogData.GetFromPage(), m_printDialogData.GetToPage()))
 699     {
 700         wxMessageBox(_("Could not start document preview."), _("Print Preview Failure"), wxOK);
 701
 702         memoryDC.SelectObject(wxNullBitmap);
 703
 704         delete m_previewBitmap;
 705         return FALSE;
 706     }
 707
 708     m_previewPrintout->OnPrintPage(pageNum);
 709     m_previewPrintout->OnEndDocument();
 710     m_previewPrintout->OnEndPrinting();
 711
 712     m_previewPrintout->SetDC(NULL);
 713
 714     memoryDC.SelectObject(wxNullBitmap);
 715
 716     wxChar buf[200];
 717     if (m_maxPage != 0)
 718         wxSprintf(buf, _("Page %d of %d"), pageNum, m_maxPage);
 719     else
 720         wxSprintf(buf, _("Page %d"), pageNum);
 721
 722     if (m_previewFrame)
 723         m_previewFrame->SetStatusText(buf);
 724
 725     return TRUE;
 726 }
 727
 728
 729 bool wxPrintPreviewBase::DrawBlankPage(wxWindow *canvas, wxDC& dc)
 730 {
 731     int canvasWidth, canvasHeight;
 732     canvas->GetSize(&canvasWidth, &canvasHeight);
 733
 734     float zoomScale = (float)((float)m_currentZoom/(float)100);
 735     float actualWidth = zoomScale*m_pageWidth*m_previewScale;
 736     float actualHeight = zoomScale*m_pageHeight*m_previewScale;
 737
 738     float x = (float)((canvasWidth - actualWidth)/2.0);
 739     if (x < m_leftMargin)
 740         x = (float)m_leftMargin;
 741     float y = (float)m_topMargin;
 742
 743     // Draw shadow, allowing for 1-pixel border AROUND the actual page
 744     int shadowOffset = 4;
 745     dc.SetPen(*wxBLACK_PEN);
 746     dc.SetBrush(*wxBLACK_BRUSH);
 747     /*
 748     dc.DrawRectangle((int)(x-1 + shadowOffset), (int)(y-1 + shadowOffset), (int)(actualWidth+2), (int)(actualHeight+2));
 749     */
 750     dc.DrawRectangle((int)(x + shadowOffset), (int)(y + actualHeight+1), (int)(actualWidth), shadowOffset);
 751     dc.DrawRectangle((int)(x + actualWidth), (int)(y + shadowOffset), shadowOffset, (int)(actualHeight));
 752
 753     // Draw blank page allowing for 1-pixel border AROUND the actual page
 754     dc.SetPen(*wxBLACK_PEN);
 755     dc.SetBrush(*wxWHITE_BRUSH);
 756
 757     /*
 758     wxRegion update_region = canvas->GetUpdateRegion();
 759     wxRect r = update_region.GetBox();
 760
 761       printf( "x: %d y: %d w: %d h: %d.\n", (int)r.x, (int)r.y, (int)r.width, (int)r.height );
 762     */
 763
 764     dc.DrawRectangle((int)(x-2), (int)(y-1), (int)(actualWidth+3), (int)(actualHeight+2));
 765
 766     return TRUE;
 767 }
 768
 769 void wxPrintPreviewBase::SetZoom(int percent)
 770 {
 771     if (m_currentZoom == percent)
 772         return;
 773
 774     m_currentZoom = percent;
 775     if (m_previewBitmap)
 776     {
 777         delete m_previewBitmap;
 778         m_previewBitmap = NULL;
 779     }
 780
 781     if (m_previewCanvas)
 782     {
 783         RenderPage(m_currentPage);
 784         ((wxScrolledWindow *) m_previewCanvas)->Scroll(0, 0);
 785         m_previewCanvas->Clear();
 786         m_previewCanvas->Refresh();
 787     }
 788 }
 789
 790 #endif // wxUSE_PRINTING_ARCHITECTURE