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