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     static const char *choices[] =
 370     {
 371         "10%", "15%", "20%", "25%", "30%", "35%", "40%", "45%", "50%", "55%",
 372         "60%", "65%", "70%", "75%", "80%", "85%", "90%", "95%", "100%", "110%",
 373         "120%", "150%", "200%"
 374     };
 375
 376     if (m_buttonFlags & wxPREVIEW_ZOOM)
 377     {
 378         m_zoomControl = new wxChoice(this, wxID_PREVIEW_ZOOM,
 379                                      wxPoint(x, y), wxSize(100, -1));
 380         SetZoomControl(m_printPreview->GetZoom());
 381     }
 382
 383     // Yes, this look stupid, but this is because gcc gives up otherwise.
 384     int n = WXSIZEOF(choices);
 385     for ( int i = 0; i < n; i++ )
 386         m_zoomControl->Append(choices[i]);
 387
 388     //  m_closeButton->SetDefault();
 389 }
 390
 391 void wxPreviewControlBar::SetZoomControl(int zoom)
 392 {
 393     char buf[20];
 394     sprintf(buf, "%d%%", zoom);
 395     if (m_zoomControl)
 396         m_zoomControl->SetStringSelection(buf);
 397 }
 398
 399 int wxPreviewControlBar::GetZoomControl()
 400 {
 401     wxChar buf[20];
 402     if (m_zoomControl && (m_zoomControl->GetStringSelection() != ""))
 403     {
 404         wxStrcpy(buf, m_zoomControl->GetStringSelection());
 405         buf[wxStrlen(buf) - 1] = 0;
 406         return (int)wxAtoi(buf);
 407     }
 408     else return 0;
 409 }
 410
 411
 412 /*
 413 * Preview frame
 414 */
 415
 416 BEGIN_EVENT_TABLE(wxPreviewFrame, wxFrame)
 417 EVT_CLOSE(wxPreviewFrame::OnCloseWindow)
 418 END_EVENT_TABLE()
 419
 420 wxPreviewFrame::wxPreviewFrame(wxPrintPreviewBase *preview, wxFrame *parent, const wxString& title,
 421                                const wxPoint& pos, const wxSize& size, long style, const wxString& name):
 422 wxFrame(parent, -1, title, pos, size, style, name)
 423 {
 424     m_printPreview = preview;
 425     m_controlBar = NULL;
 426     m_previewCanvas = NULL;
 427 }
 428
 429 wxPreviewFrame::~wxPreviewFrame()
 430 {
 431 }
 432
 433 void wxPreviewFrame::OnCloseWindow(wxCloseEvent& event)
 434 {
 435     MakeModal(FALSE);
 436
 437     // Need to delete the printout and the print preview
 438     wxPrintout *printout = m_printPreview->GetPrintout();
 439     if (printout)
 440     {
 441         delete printout;
 442         m_printPreview->SetPrintout(NULL);
 443         m_printPreview->SetCanvas(NULL);
 444         m_printPreview->SetFrame(NULL);
 445     }
 446     delete m_printPreview;
 447
 448     Destroy();
 449 }
 450
 451 void wxPreviewFrame::Initialize()
 452 {
 453     CreateStatusBar();
 454
 455     CreateCanvas();
 456     CreateControlBar();
 457
 458     m_printPreview->SetCanvas(m_previewCanvas);
 459     m_printPreview->SetFrame(this);
 460
 461     // Set layout constraints here
 462
 463     // Control bar constraints
 464     wxLayoutConstraints *c1 = new wxLayoutConstraints;
 465     //  int w, h;
 466     //  m_controlBar->GetSize(&w, &h);
 467     int h;
 468 #if (defined(__WXMSW__) || defined(__WXGTK__))
 469     h = 40;
 470 #else
 471     h = 60;
 472 #endif
 473
 474     c1->left.SameAs       (this, wxLeft);
 475     c1->top.SameAs        (this, wxTop);
 476     c1->right.SameAs      (this, wxRight);
 477     c1->height.Absolute   (h);
 478
 479     m_controlBar->SetConstraints(c1);
 480
 481     // Canvas constraints
 482     wxLayoutConstraints *c2 = new wxLayoutConstraints;
 483
 484     c2->left.SameAs       (this, wxLeft);
 485     c2->top.Below         (m_controlBar);
 486     c2->right.SameAs      (this, wxRight);
 487     c2->bottom.SameAs     (this, wxBottom);
 488
 489     m_previewCanvas->SetConstraints(c2);
 490
 491     SetAutoLayout(TRUE);
 492
 493     MakeModal(TRUE);
 494
 495     Layout();
 496 }
 497
 498 void wxPreviewFrame::CreateCanvas()
 499 {
 500     m_previewCanvas = new wxPreviewCanvas(m_printPreview, this);
 501 }
 502
 503 void wxPreviewFrame::CreateControlBar()
 504 {
 505     long buttons = wxPREVIEW_DEFAULT;
 506     if (m_printPreview->GetPrintoutForPrinting())
 507         buttons |= wxPREVIEW_PRINT;
 508
 509     m_controlBar = new wxPreviewControlBar(m_printPreview, buttons, this, wxPoint(0, 0), wxSize(400, 40));
 510     m_controlBar->CreateButtons();
 511 }
 512
 513 /*
 514 * Print preview
 515 */
 516
 517 wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout,
 518                                        wxPrintout *printoutForPrinting,
 519                                        wxPrintData *data)
 520 {
 521     if (data)
 522         m_printDialogData = (*data);
 523
 524     Init(printout, printoutForPrinting);
 525 }
 526
 527 wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout,
 528                                        wxPrintout *printoutForPrinting,
 529                                        wxPrintDialogData *data)
 530 {
 531     if (data)
 532         m_printDialogData = (*data);
 533
 534     Init(printout, printoutForPrinting);
 535 }
 536
 537 void wxPrintPreviewBase::Init(wxPrintout *printout,
 538                               wxPrintout *printoutForPrinting)
 539 {
 540     m_isOk = TRUE;
 541     m_previewPrintout = printout;
 542     if (m_previewPrintout)
 543         m_previewPrintout->SetIsPreview(TRUE);
 544
 545     m_printPrintout = printoutForPrinting;
 546
 547     m_previewCanvas = NULL;
 548     m_previewFrame = NULL;
 549     m_previewBitmap = NULL;
 550     m_currentPage = 1;
 551     m_currentZoom = 30;
 552     m_topMargin = 40;
 553     m_leftMargin = 40;
 554     m_pageWidth = 0;
 555     m_pageHeight = 0;
 556
 557     printout->OnPreparePrinting();
 558
 559     // Get some parameters from the printout, if defined
 560     int selFrom, selTo;
 561     printout->GetPageInfo(&m_minPage, &m_maxPage, &selFrom, &selTo);
 562 }
 563
 564 wxPrintPreviewBase::~wxPrintPreviewBase()
 565 {
 566     if (m_previewPrintout)
 567         delete m_previewPrintout;
 568     if (m_previewBitmap)
 569         delete m_previewBitmap;
 570     if (m_printPrintout)
 571         delete m_printPrintout;
 572 }
 573
 574 bool wxPrintPreviewBase::SetCurrentPage(int pageNum)
 575 {
 576     if (m_currentPage == pageNum)
 577         return TRUE;
 578
 579     m_currentPage = pageNum;
 580     if (m_previewBitmap)
 581     {
 582         delete m_previewBitmap;
 583         m_previewBitmap = NULL;
 584     }
 585
 586     if (m_previewCanvas)
 587     {
 588         RenderPage(pageNum);
 589         m_previewCanvas->Refresh();
 590     }
 591     return TRUE;
 592 }
 593
 594 bool wxPrintPreviewBase::PaintPage(wxWindow *canvas, wxDC& dc)
 595 {
 596     DrawBlankPage(canvas, dc);
 597
 598     if (!m_previewBitmap)
 599         RenderPage(m_currentPage);
 600
 601     if (!m_previewBitmap)
 602         return FALSE;
 603
 604     if (!canvas)
 605         return FALSE;
 606
 607     int canvasWidth, canvasHeight;
 608     canvas->GetSize(&canvasWidth, &canvasHeight);
 609
 610     double zoomScale = ((float)m_currentZoom/(float)100);
 611     double actualWidth = (zoomScale*m_pageWidth*m_previewScale);
 612     //  float actualHeight = (float)(zoomScale*m_pageHeight*m_previewScale);
 613
 614     int x = (int) ((canvasWidth - actualWidth)/2.0);
 615     if (x < m_leftMargin)
 616         x = m_leftMargin;
 617     int y = m_topMargin;
 618
 619     wxMemoryDC temp_dc;
 620     temp_dc.SelectObject(*m_previewBitmap);
 621
 622     dc.Blit(x, y, m_previewBitmap->GetWidth(), m_previewBitmap->GetHeight(), &temp_dc, 0, 0);
 623
 624     temp_dc.SelectObject(wxNullBitmap);
 625
 626     return TRUE;
 627 }
 628
 629 bool wxPrintPreviewBase::RenderPage(int pageNum)
 630 {
 631     int canvasWidth, canvasHeight;
 632
 633     if (!m_previewCanvas)
 634     {
 635         wxMessageBox(_("wxPrintPreviewBase::RenderPage: must use wxPrintPreviewBase::SetCanvas to let me know about the canvas!"),
 636             _("Print Preview Failure"), wxOK);
 637         return FALSE;
 638     }
 639     m_previewCanvas->GetSize(&canvasWidth, &canvasHeight);
 640
 641     double zoomScale = (m_currentZoom/100.0);
 642     int actualWidth = (int)(zoomScale*m_pageWidth*m_previewScale);
 643     int actualHeight = (int)(zoomScale*m_pageHeight*m_previewScale);
 644
 645     int x = (int)((canvasWidth - actualWidth)/2.0);
 646     if (x < m_leftMargin)
 647         x = m_leftMargin;
 648     //  int y = m_topMargin;
 649
 650
 651     if (!m_previewBitmap)
 652     {
 653         m_previewBitmap = new wxBitmap((int)actualWidth, (int)actualHeight);
 654         if (!m_previewBitmap || !m_previewBitmap->Ok())
 655         {
 656             if (m_previewBitmap)
 657                 delete m_previewBitmap;
 658             wxMessageBox(_("Sorry, not enough memory to create a preview."), _("Print Preview Failure"), wxOK);
 659             return FALSE;
 660         }
 661     }
 662
 663     wxMemoryDC memoryDC;
 664     memoryDC.SelectObject(*m_previewBitmap);
 665
 666     memoryDC.Clear();
 667
 668     m_previewPrintout->SetDC(&memoryDC);
 669     m_previewPrintout->SetPageSizePixels(m_pageWidth, m_pageHeight);
 670
 671     m_previewPrintout->OnBeginPrinting();
 672
 673     if (!m_previewPrintout->OnBeginDocument(m_printDialogData.GetFromPage(), m_printDialogData.GetToPage()))
 674     {
 675         wxMessageBox(_("Could not start document preview."), _("Print Preview Failure"), wxOK);
 676
 677         memoryDC.SelectObject(wxNullBitmap);
 678
 679         delete m_previewBitmap;
 680         return FALSE;
 681     }
 682
 683     m_previewPrintout->OnPrintPage(pageNum);
 684     m_previewPrintout->OnEndDocument();
 685     m_previewPrintout->OnEndPrinting();
 686
 687     m_previewPrintout->SetDC(NULL);
 688
 689     memoryDC.SelectObject(wxNullBitmap);
 690
 691     wxChar buf[200];
 692     if (m_maxPage != 0)
 693         wxSprintf(buf, _("Page %d of %d"), pageNum, m_maxPage);
 694     else
 695         wxSprintf(buf, _("Page %d"), pageNum);
 696
 697     if (m_previewFrame)
 698         m_previewFrame->SetStatusText(buf);
 699
 700     return TRUE;
 701 }
 702
 703
 704 bool wxPrintPreviewBase::DrawBlankPage(wxWindow *canvas, wxDC& dc)
 705 {
 706     int canvasWidth, canvasHeight;
 707     canvas->GetSize(&canvasWidth, &canvasHeight);
 708
 709     float zoomScale = (float)((float)m_currentZoom/(float)100);
 710     float actualWidth = zoomScale*m_pageWidth*m_previewScale;
 711     float actualHeight = zoomScale*m_pageHeight*m_previewScale;
 712
 713     float x = (float)((canvasWidth - actualWidth)/2.0);
 714     if (x < m_leftMargin)
 715         x = (float)m_leftMargin;
 716     float y = (float)m_topMargin;
 717
 718     // Draw shadow, allowing for 1-pixel border AROUND the actual page
 719     int shadowOffset = 4;
 720     dc.SetPen(*wxBLACK_PEN);
 721     dc.SetBrush(*wxBLACK_BRUSH);
 722     /*
 723     dc.DrawRectangle((int)(x-1 + shadowOffset), (int)(y-1 + shadowOffset), (int)(actualWidth+2), (int)(actualHeight+2));
 724     */
 725     dc.DrawRectangle((int)(x + shadowOffset), (int)(y + actualHeight+1), (int)(actualWidth), shadowOffset);
 726     dc.DrawRectangle((int)(x + actualWidth), (int)(y + shadowOffset), shadowOffset, (int)(actualHeight));
 727
 728     // Draw blank page allowing for 1-pixel border AROUND the actual page
 729     dc.SetPen(*wxBLACK_PEN);
 730     dc.SetBrush(*wxWHITE_BRUSH);
 731
 732     /*
 733     wxRegion update_region = canvas->GetUpdateRegion();
 734     wxRect r = update_region.GetBox();
 735
 736       printf( "x: %d y: %d w: %d h: %d.\n", (int)r.x, (int)r.y, (int)r.width, (int)r.height );
 737     */
 738
 739     dc.DrawRectangle((int)(x-2), (int)(y-1), (int)(actualWidth+3), (int)(actualHeight+2));
 740
 741     return TRUE;
 742 }
 743
 744 void wxPrintPreviewBase::SetZoom(int percent)
 745 {
 746     if (m_currentZoom == percent)
 747         return;
 748
 749     m_currentZoom = percent;
 750     if (m_previewBitmap)
 751     {
 752         delete m_previewBitmap;
 753         m_previewBitmap = NULL;
 754     }
 755     RenderPage(m_currentPage);
 756
 757     if (m_previewCanvas)
 758     {
 759         m_previewCanvas->Clear();
 760         m_previewCanvas->Refresh();
 761     }
 762 }
 763