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