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::OnPreviousButton)
 224     EVT_BUTTON(wxID_PREVIEW_NEXT,     wxPreviewControlBar::OnNextButton)
 225     EVT_CHAR(wxPreviewControlBar::OnChar)
 226     EVT_CHOICE(wxID_PREVIEW_ZOOM,     wxPreviewControlBar::OnZoom)
 227     EVT_PAINT(wxPreviewControlBar::OnPaint)
 228 END_EVENT_TABLE()
 229
 230 wxPreviewControlBar::wxPreviewControlBar(wxPrintPreviewBase *preview, long buttons,
 231                                          wxWindow *parent, const wxPoint& pos, const wxSize& size,
 232                                          long style, const wxString& name):
 233 wxPanel(parent, -1, pos, size, style, name)
 234 {
 235     m_printPreview = preview;
 236     m_closeButton = (wxButton *) NULL;
 237     m_nextPageButton = (wxButton *) NULL;
 238     m_previousPageButton = (wxButton *) NULL;
 239     m_printButton = (wxButton *) NULL;
 240     m_zoomControl = (wxChoice *) NULL;
 241     m_buttonFlags = buttons;
 242 }
 243
 244 wxPreviewControlBar::~wxPreviewControlBar()
 245 {
 246 }
 247
 248 void wxPreviewControlBar::OnPaint(wxPaintEvent& WXUNUSED(event))
 249 {
 250     wxPaintDC dc(this);
 251
 252     int w, h;
 253     GetSize(&w, &h);
 254     dc.SetPen(*wxBLACK_PEN);
 255     dc.SetBrush(*wxTRANSPARENT_BRUSH);
 256     dc.DrawLine( 0, h-1, w, h-1 );
 257 }
 258
 259 void wxPreviewControlBar::OnWindowClose(wxCommandEvent& WXUNUSED(event))
 260 {
 261     wxPreviewFrame *frame = (wxPreviewFrame *)GetParent();
 262     frame->Close(TRUE);
 263 }
 264
 265 void wxPreviewControlBar::OnPrint(wxCommandEvent& WXUNUSED(event))
 266 {
 267     wxPrintPreviewBase *preview = GetPrintPreview();
 268     preview->Print(TRUE);
 269 }
 270
 271 void wxPreviewControlBar::OnChar(wxKeyEvent &event)
 272 {
 273    switch(event.KeyCode())
 274    {
 275    case WXK_NEXT:
 276       OnNext(); break;
 277    case WXK_PRIOR:
 278       OnPrevious(); break;
 279    default:
 280       event.Skip();
 281    }
 282 }
 283
 284 void wxPreviewControlBar::OnNext(void)
 285 {
 286     wxPrintPreviewBase *preview = GetPrintPreview();
 287     if (preview)
 288     {
 289         int currentPage = preview->GetCurrentPage();
 290         if ((preview->GetMaxPage() > 0) &&
 291             (currentPage < preview->GetMaxPage()) &&
 292             preview->GetPrintout()->HasPage(currentPage + 1))
 293         {
 294             preview->SetCurrentPage(currentPage + 1);
 295         }
 296     }
 297 }
 298
 299 void wxPreviewControlBar::OnPrevious(void)
 300 {
 301     wxPrintPreviewBase *preview = GetPrintPreview();
 302     if (preview)
 303     {
 304         int currentPage = preview->GetCurrentPage();
 305         if ((preview->GetMinPage() > 0) &&
 306             (currentPage > preview->GetMinPage()) &&
 307             preview->GetPrintout()->HasPage(currentPage - 1))
 308         {
 309             preview->SetCurrentPage(currentPage - 1);
 310         }
 311     }
 312 }
 313
 314 void wxPreviewControlBar::OnZoom(wxCommandEvent& WXUNUSED(event))
 315 {
 316     int zoom = GetZoomControl();
 317     if (GetPrintPreview())
 318         GetPrintPreview()->SetZoom(zoom);
 319 }
 320
 321 void wxPreviewControlBar::CreateButtons()
 322 {
 323     SetSize(0, 0, 400, 40);
 324
 325     /*
 326     #ifdef __WXMSW__
 327     int fontSize = 9;
 328     #else
 329     int fontSize = 10;
 330     #endif
 331
 332       wxFont buttonFont(fontSize, wxSWISS, wxNORMAL, wxBOLD);
 333       SetFont(buttonFont);
 334     */
 335
 336     int buttonWidth = 65;
 337 #ifdef __WXGTK__
 338     int buttonHeight = -1;
 339 #else
 340     int buttonHeight = 24;
 341 #endif
 342
 343     int x = 5;
 344     int y = 5;
 345
 346 #ifdef __WXMOTIF__
 347     int gap = 15;
 348 #else
 349     int gap = 5;
 350 #endif
 351
 352     m_closeButton = new wxButton(this, wxID_PREVIEW_CLOSE, _("Close"),
 353         wxPoint(x, y), wxSize(buttonWidth, buttonHeight));
 354
 355     x += gap + buttonWidth;
 356
 357     if (m_buttonFlags & wxPREVIEW_PRINT)
 358     {
 359         m_printButton =  new wxButton(this, wxID_PREVIEW_PRINT, _("Print..."), wxPoint(x, y),
 360             wxSize(buttonWidth, buttonHeight));
 361         x += gap + buttonWidth;
 362     }
 363
 364     if (m_buttonFlags & wxPREVIEW_PREVIOUS)
 365     {
 366         m_previousPageButton = new wxButton(this, wxID_PREVIEW_PREVIOUS, "<<", wxPoint(x, y),
 367             wxSize(buttonWidth, buttonHeight));
 368         x += gap + buttonWidth;
 369     }
 370
 371     if (m_buttonFlags & wxPREVIEW_NEXT)
 372     {
 373         m_nextPageButton = new wxButton(this, wxID_PREVIEW_NEXT, ">>",
 374             wxPoint(x, y), wxSize(buttonWidth, buttonHeight));
 375         x += gap + buttonWidth;
 376     }
 377
 378     if (m_buttonFlags & wxPREVIEW_ZOOM)
 379     {
 380         static const char *choices[] =
 381         {
 382             "10%", "15%", "20%", "25%", "30%", "35%", "40%", "45%", "50%", "55%",
 383             "60%", "65%", "70%", "75%", "80%", "85%", "90%", "95%", "100%", "110%",
 384             "120%", "150%", "200%"
 385         };
 386
 387         m_zoomControl = new wxChoice(this, wxID_PREVIEW_ZOOM,
 388                                      wxPoint(x, y), wxSize(100, -1));
 389
 390         // Yes, this look stupid, but this is because gcc gives up otherwise.
 391         int n = WXSIZEOF(choices);
 392 // Someone is calling methods that do no exist in wxChoice!! So I'll just comment out for VA for now
 393         for ( int i = 0; i < n; i++ )
 394            m_zoomControl->Append(choices[i]);
 395         SetZoomControl(m_printPreview->GetZoom());
 396     }
 397
 398     //  m_closeButton->SetDefault();
 399 }
 400
 401 void wxPreviewControlBar::SetZoomControl(int zoom)
 402 {
 403     char buf[20];
 404     sprintf(buf, "%d%%", zoom);
 405 // Someone is calling methods that do no exist in wxChoice!! So I'll just comment out for VA for now
 406     if (m_zoomControl)
 407         m_zoomControl->SetStringSelection(buf);
 408 }
 409
 410 int wxPreviewControlBar::GetZoomControl()
 411 {
 412     wxChar buf[20];
 413     if (m_zoomControl && (m_zoomControl->GetStringSelection() != wxT("")))
 414     {
 415         wxStrcpy(buf, m_zoomControl->GetStringSelection());
 416         buf[wxStrlen(buf) - 1] = 0;
 417         return (int)wxAtoi(buf);
 418     }
 419     else return 0;
 420 }
 421
 422
 423 /*
 424 * Preview frame
 425 */
 426
 427 BEGIN_EVENT_TABLE(wxPreviewFrame, wxFrame)
 428     EVT_CLOSE(wxPreviewFrame::OnCloseWindow)
 429 END_EVENT_TABLE()
 430
 431 wxPreviewFrame::wxPreviewFrame(wxPrintPreviewBase *preview, wxFrame *parent, const wxString& title,
 432                                const wxPoint& pos, const wxSize& size, long style, const wxString& name):
 433 wxFrame(parent, -1, title, pos, size, style, name)
 434 {
 435     m_printPreview = preview;
 436     m_controlBar = NULL;
 437     m_previewCanvas = NULL;
 438 }
 439
 440 wxPreviewFrame::~wxPreviewFrame()
 441 {
 442 }
 443
 444 void wxPreviewFrame::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 445 {
 446     MakeModal(FALSE);
 447
 448     // Need to delete the printout and the print preview
 449     wxPrintout *printout = m_printPreview->GetPrintout();
 450     if (printout)
 451     {
 452         delete printout;
 453         m_printPreview->SetPrintout(NULL);
 454         m_printPreview->SetCanvas(NULL);
 455         m_printPreview->SetFrame(NULL);
 456     }
 457     delete m_printPreview;
 458
 459     Destroy();
 460 }
 461
 462 void wxPreviewFrame::Initialize()
 463 {
 464     CreateStatusBar();
 465
 466     CreateCanvas();
 467     CreateControlBar();
 468
 469     m_printPreview->SetCanvas(m_previewCanvas);
 470     m_printPreview->SetFrame(this);
 471
 472     // Set layout constraints here
 473
 474     // Control bar constraints
 475     wxLayoutConstraints *c1 = new wxLayoutConstraints;
 476     //  int w, h;
 477     //  m_controlBar->GetSize(&w, &h);
 478     int h;
 479 #if (defined(__WXMSW__) || defined(__WXGTK__))
 480     h = 40;
 481 #else
 482     h = 60;
 483 #endif
 484
 485     c1->left.SameAs       (this, wxLeft);
 486     c1->top.SameAs        (this, wxTop);
 487     c1->right.SameAs      (this, wxRight);
 488     c1->height.Absolute   (h);
 489
 490     m_controlBar->SetConstraints(c1);
 491
 492     // Canvas constraints
 493     wxLayoutConstraints *c2 = new wxLayoutConstraints;
 494
 495     c2->left.SameAs       (this, wxLeft);
 496     c2->top.Below         (m_controlBar);
 497     c2->right.SameAs      (this, wxRight);
 498     c2->bottom.SameAs     (this, wxBottom);
 499
 500     m_previewCanvas->SetConstraints(c2);
 501
 502     SetAutoLayout(TRUE);
 503
 504     MakeModal(TRUE);
 505
 506     Layout();
 507 }
 508
 509 void wxPreviewFrame::CreateCanvas()
 510 {
 511     m_previewCanvas = new wxPreviewCanvas(m_printPreview, this);
 512 }
 513
 514 void wxPreviewFrame::CreateControlBar()
 515 {
 516     long buttons = wxPREVIEW_DEFAULT;
 517     if (m_printPreview->GetPrintoutForPrinting())
 518         buttons |= wxPREVIEW_PRINT;
 519
 520     m_controlBar = new wxPreviewControlBar(m_printPreview, buttons, this, wxPoint(0, 0), wxSize(400, 40));
 521     m_controlBar->CreateButtons();
 522 }
 523
 524 /*
 525 * Print preview
 526 */
 527
 528 wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout,
 529                                        wxPrintout *printoutForPrinting,
 530                                        wxPrintData *data)
 531 {
 532     if (data)
 533         m_printDialogData = (*data);
 534
 535     Init(printout, printoutForPrinting);
 536 }
 537
 538 wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout,
 539                                        wxPrintout *printoutForPrinting,
 540                                        wxPrintDialogData *data)
 541 {
 542     if (data)
 543         m_printDialogData = (*data);
 544
 545     Init(printout, printoutForPrinting);
 546 }
 547
 548 void wxPrintPreviewBase::Init(wxPrintout *printout,
 549                               wxPrintout *printoutForPrinting)
 550 {
 551     m_isOk = TRUE;
 552     m_previewPrintout = printout;
 553     if (m_previewPrintout)
 554         m_previewPrintout->SetIsPreview(TRUE);
 555
 556     m_printPrintout = printoutForPrinting;
 557
 558     m_previewCanvas = NULL;
 559     m_previewFrame = NULL;
 560     m_previewBitmap = NULL;
 561     m_currentPage = 1;
 562     m_currentZoom = 70;
 563     m_topMargin = 40;
 564     m_leftMargin = 40;
 565     m_pageWidth = 0;
 566     m_pageHeight = 0;
 567     m_printingPrepared = FALSE;
 568
 569     // Too soon! Moved to RenderPage.
 570     // printout->OnPreparePrinting();
 571
 572     // Get some parameters from the printout, if defined
 573     int selFrom, selTo;
 574     printout->GetPageInfo(&m_minPage, &m_maxPage, &selFrom, &selTo);
 575 }
 576
 577 wxPrintPreviewBase::~wxPrintPreviewBase()
 578 {
 579     if (m_previewPrintout)
 580         delete m_previewPrintout;
 581     if (m_previewBitmap)
 582         delete m_previewBitmap;
 583     if (m_printPrintout)
 584         delete m_printPrintout;
 585 }
 586
 587 bool wxPrintPreviewBase::SetCurrentPage(int pageNum)
 588 {
 589     if (m_currentPage == pageNum)
 590         return TRUE;
 591
 592     m_currentPage = pageNum;
 593     if (m_previewBitmap)
 594     {
 595         delete m_previewBitmap;
 596         m_previewBitmap = NULL;
 597     }
 598
 599     if (m_previewCanvas)
 600     {
 601         RenderPage(pageNum);
 602         m_previewCanvas->Refresh();
 603     }
 604     return TRUE;
 605 }
 606
 607 bool wxPrintPreviewBase::PaintPage(wxWindow *canvas, wxDC& dc)
 608 {
 609     DrawBlankPage(canvas, dc);
 610
 611     if (!m_previewBitmap)
 612         RenderPage(m_currentPage);
 613
 614     if (!m_previewBitmap)
 615         return FALSE;
 616
 617     if (!canvas)
 618         return FALSE;
 619
 620     int canvasWidth, canvasHeight;
 621     canvas->GetSize(&canvasWidth, &canvasHeight);
 622
 623     double zoomScale = ((float)m_currentZoom/(float)100);
 624     double actualWidth = (zoomScale*m_pageWidth*m_previewScale);
 625     //  float actualHeight = (float)(zoomScale*m_pageHeight*m_previewScale);
 626
 627     int x = (int) ((canvasWidth - actualWidth)/2.0);
 628     if (x < m_leftMargin)
 629         x = m_leftMargin;
 630     int y = m_topMargin;
 631
 632     wxMemoryDC temp_dc;
 633     temp_dc.SelectObject(*m_previewBitmap);
 634
 635     dc.Blit(x, y, m_previewBitmap->GetWidth(), m_previewBitmap->GetHeight(), &temp_dc, 0, 0);
 636
 637     temp_dc.SelectObject(wxNullBitmap);
 638
 639     return TRUE;
 640 }
 641
 642 bool wxPrintPreviewBase::RenderPage(int pageNum)
 643 {
 644     int canvasWidth, canvasHeight;
 645
 646     if (!m_previewCanvas)
 647     {
 648         wxMessageBox(_("wxPrintPreviewBase::RenderPage: must use wxPrintPreviewBase::SetCanvas to let me know about the canvas!"),
 649             _("Print Preview Failure"), wxOK);
 650         return FALSE;
 651     }
 652     m_previewCanvas->GetSize(&canvasWidth, &canvasHeight);
 653
 654     double zoomScale = (m_currentZoom/100.0);
 655     int actualWidth = (int)(zoomScale*m_pageWidth*m_previewScale);
 656     int actualHeight = (int)(zoomScale*m_pageHeight*m_previewScale);
 657
 658     int x = (int)((canvasWidth - actualWidth)/2.0);
 659     if (x < m_leftMargin)
 660         x = m_leftMargin;
 661     //  int y = m_topMargin;
 662
 663
 664     if (!m_previewBitmap)
 665     {
 666         m_previewBitmap = new wxBitmap((int)actualWidth, (int)actualHeight);
 667         if (!m_previewBitmap || !m_previewBitmap->Ok())
 668         {
 669             if (m_previewBitmap)
 670                 delete m_previewBitmap;
 671             wxMessageBox(_("Sorry, not enough memory to create a preview."), _("Print Preview Failure"), wxOK);
 672             return FALSE;
 673         }
 674     }
 675
 676     wxMemoryDC memoryDC;
 677     memoryDC.SelectObject(*m_previewBitmap);
 678
 679     memoryDC.Clear();
 680
 681     m_previewPrintout->SetDC(&memoryDC);
 682     m_previewPrintout->SetPageSizePixels(m_pageWidth, m_pageHeight);
 683
 684     // Need to delay OnPreparePrinting until here, so we have enough information.
 685     if (!m_printingPrepared)
 686     {
 687         m_previewPrintout->OnPreparePrinting();
 688         m_printingPrepared = TRUE;
 689     }
 690
 691     m_previewPrintout->OnBeginPrinting();
 692
 693     if (!m_previewPrintout->OnBeginDocument(m_printDialogData.GetFromPage(), m_printDialogData.GetToPage()))
 694     {
 695         wxMessageBox(_("Could not start document preview."), _("Print Preview Failure"), wxOK);
 696
 697         memoryDC.SelectObject(wxNullBitmap);
 698
 699         delete m_previewBitmap;
 700         return FALSE;
 701     }
 702
 703     m_previewPrintout->OnPrintPage(pageNum);
 704     m_previewPrintout->OnEndDocument();
 705     m_previewPrintout->OnEndPrinting();
 706
 707     m_previewPrintout->SetDC(NULL);
 708
 709     memoryDC.SelectObject(wxNullBitmap);
 710
 711     wxChar buf[200];
 712     if (m_maxPage != 0)
 713         wxSprintf(buf, _("Page %d of %d"), pageNum, m_maxPage);
 714     else
 715         wxSprintf(buf, _("Page %d"), pageNum);
 716
 717     if (m_previewFrame)
 718         m_previewFrame->SetStatusText(buf);
 719
 720     return TRUE;
 721 }
 722
 723
 724 bool wxPrintPreviewBase::DrawBlankPage(wxWindow *canvas, wxDC& dc)
 725 {
 726     int canvasWidth, canvasHeight;
 727     canvas->GetSize(&canvasWidth, &canvasHeight);
 728
 729     float zoomScale = (float)((float)m_currentZoom/(float)100);
 730     float actualWidth = zoomScale*m_pageWidth*m_previewScale;
 731     float actualHeight = zoomScale*m_pageHeight*m_previewScale;
 732
 733     float x = (float)((canvasWidth - actualWidth)/2.0);
 734     if (x < m_leftMargin)
 735         x = (float)m_leftMargin;
 736     float y = (float)m_topMargin;
 737
 738     // Draw shadow, allowing for 1-pixel border AROUND the actual page
 739     int shadowOffset = 4;
 740     dc.SetPen(*wxBLACK_PEN);
 741     dc.SetBrush(*wxBLACK_BRUSH);
 742     /*
 743     dc.DrawRectangle((int)(x-1 + shadowOffset), (int)(y-1 + shadowOffset), (int)(actualWidth+2), (int)(actualHeight+2));
 744     */
 745     dc.DrawRectangle((int)(x + shadowOffset), (int)(y + actualHeight+1), (int)(actualWidth), shadowOffset);
 746     dc.DrawRectangle((int)(x + actualWidth), (int)(y + shadowOffset), shadowOffset, (int)(actualHeight));
 747
 748     // Draw blank page allowing for 1-pixel border AROUND the actual page
 749     dc.SetPen(*wxBLACK_PEN);
 750     dc.SetBrush(*wxWHITE_BRUSH);
 751
 752     /*
 753     wxRegion update_region = canvas->GetUpdateRegion();
 754     wxRect r = update_region.GetBox();
 755
 756       printf( "x: %d y: %d w: %d h: %d.\n", (int)r.x, (int)r.y, (int)r.width, (int)r.height );
 757     */
 758
 759     dc.DrawRectangle((int)(x-2), (int)(y-1), (int)(actualWidth+3), (int)(actualHeight+2));
 760
 761     return TRUE;
 762 }
 763
 764 void wxPrintPreviewBase::SetZoom(int percent)
 765 {
 766     if (m_currentZoom == percent)
 767         return;
 768
 769     m_currentZoom = percent;
 770     if (m_previewBitmap)
 771     {
 772         delete m_previewBitmap;
 773         m_previewBitmap = NULL;
 774     }
 775
 776
 777     if (m_previewCanvas)
 778     {
 779         RenderPage(m_currentPage);
 780         m_previewCanvas->Clear();
 781         m_previewCanvas->Refresh();
 782     }
 783 }
 784
 785 #endif // wxUSE_PRINTING_ARCHITECTURE