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     if (m_buttonFlags & wxPREVIEW_ZOOM)
 370     {
 371         static const char *choices[] =
 372         {
 373             "10%", "15%", "20%", "25%", "30%", "35%", "40%", "45%", "50%", "55%",
 374             "60%", "65%", "70%", "75%", "80%", "85%", "90%", "95%", "100%", "110%",
 375             "120%", "150%", "200%"
 376         };
 377
 378         m_zoomControl = new wxChoice(this, wxID_PREVIEW_ZOOM,
 379                                      wxPoint(x, y), wxSize(100, -1));
 380
 381         // Yes, this look stupid, but this is because gcc gives up otherwise.
 382         int n = WXSIZEOF(choices);
 383         for ( int i = 0; i < n; i++ )
 384            m_zoomControl->Append(choices[i]);
 385
 386         SetZoomControl(m_printPreview->GetZoom());
 387     }
 388
 389     //  m_closeButton->SetDefault();
 390 }
 391
 392 void wxPreviewControlBar::SetZoomControl(int zoom)
 393 {
 394     char buf[20];
 395     sprintf(buf, "%d%%", zoom);
 396     if (m_zoomControl)
 397         m_zoomControl->SetStringSelection(buf);
 398 }
 399
 400 int wxPreviewControlBar::GetZoomControl()
 401 {
 402     wxChar buf[20];
 403     if (m_zoomControl && (m_zoomControl->GetStringSelection() != _T("")))
 404     {
 405         wxStrcpy(buf, m_zoomControl->GetStringSelection());
 406         buf[wxStrlen(buf) - 1] = 0;
 407         return (int)wxAtoi(buf);
 408     }
 409     else return 0;
 410 }
 411
 412
 413 /*
 414 * Preview frame
 415 */
 416
 417 BEGIN_EVENT_TABLE(wxPreviewFrame, wxFrame)
 418 EVT_CLOSE(wxPreviewFrame::OnCloseWindow)
 419 END_EVENT_TABLE()
 420
 421 wxPreviewFrame::wxPreviewFrame(wxPrintPreviewBase *preview, wxFrame *parent, const wxString& title,
 422                                const wxPoint& pos, const wxSize& size, long style, const wxString& name):
 423 wxFrame(parent, -1, title, pos, size, style, name)
 424 {
 425     m_printPreview = preview;
 426     m_controlBar = NULL;
 427     m_previewCanvas = NULL;
 428 }
 429
 430 wxPreviewFrame::~wxPreviewFrame()
 431 {
 432 }
 433
 434 void wxPreviewFrame::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 435 {
 436     MakeModal(FALSE);
 437
 438     // Need to delete the printout and the print preview
 439     wxPrintout *printout = m_printPreview->GetPrintout();
 440     if (printout)
 441     {
 442         delete printout;
 443         m_printPreview->SetPrintout(NULL);
 444         m_printPreview->SetCanvas(NULL);
 445         m_printPreview->SetFrame(NULL);
 446     }
 447     delete m_printPreview;
 448
 449     Destroy();
 450 }
 451
 452 void wxPreviewFrame::Initialize()
 453 {
 454     CreateStatusBar();
 455
 456     CreateCanvas();
 457     CreateControlBar();
 458
 459     m_printPreview->SetCanvas(m_previewCanvas);
 460     m_printPreview->SetFrame(this);
 461
 462     // Set layout constraints here
 463
 464     // Control bar constraints
 465     wxLayoutConstraints *c1 = new wxLayoutConstraints;
 466     //  int w, h;
 467     //  m_controlBar->GetSize(&w, &h);
 468     int h;
 469 #if (defined(__WXMSW__) || defined(__WXGTK__))
 470     h = 40;
 471 #else
 472     h = 60;
 473 #endif
 474
 475     c1->left.SameAs       (this, wxLeft);
 476     c1->top.SameAs        (this, wxTop);
 477     c1->right.SameAs      (this, wxRight);
 478     c1->height.Absolute   (h);
 479
 480     m_controlBar->SetConstraints(c1);
 481
 482     // Canvas constraints
 483     wxLayoutConstraints *c2 = new wxLayoutConstraints;
 484
 485     c2->left.SameAs       (this, wxLeft);
 486     c2->top.Below         (m_controlBar);
 487     c2->right.SameAs      (this, wxRight);
 488     c2->bottom.SameAs     (this, wxBottom);
 489
 490     m_previewCanvas->SetConstraints(c2);
 491
 492     SetAutoLayout(TRUE);
 493
 494     MakeModal(TRUE);
 495
 496     Layout();
 497 }
 498
 499 void wxPreviewFrame::CreateCanvas()
 500 {
 501     m_previewCanvas = new wxPreviewCanvas(m_printPreview, this);
 502 }
 503
 504 void wxPreviewFrame::CreateControlBar()
 505 {
 506     long buttons = wxPREVIEW_DEFAULT;
 507     if (m_printPreview->GetPrintoutForPrinting())
 508         buttons |= wxPREVIEW_PRINT;
 509
 510     m_controlBar = new wxPreviewControlBar(m_printPreview, buttons, this, wxPoint(0, 0), wxSize(400, 40));
 511     m_controlBar->CreateButtons();
 512 }
 513
 514 /*
 515 * Print preview
 516 */
 517
 518 wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout,
 519                                        wxPrintout *printoutForPrinting,
 520                                        wxPrintData *data)
 521 {
 522     if (data)
 523         m_printDialogData = (*data);
 524
 525     Init(printout, printoutForPrinting);
 526 }
 527
 528 wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout,
 529                                        wxPrintout *printoutForPrinting,
 530                                        wxPrintDialogData *data)
 531 {
 532     if (data)
 533         m_printDialogData = (*data);
 534
 535     Init(printout, printoutForPrinting);
 536 }
 537
 538 void wxPrintPreviewBase::Init(wxPrintout *printout,
 539                               wxPrintout *printoutForPrinting)
 540 {
 541     m_isOk = TRUE;
 542     m_previewPrintout = printout;
 543     if (m_previewPrintout)
 544         m_previewPrintout->SetIsPreview(TRUE);
 545
 546     m_printPrintout = printoutForPrinting;
 547
 548     m_previewCanvas = NULL;
 549     m_previewFrame = NULL;
 550     m_previewBitmap = NULL;
 551     m_currentPage = 1;
 552     m_currentZoom = 70;
 553     m_topMargin = 40;
 554     m_leftMargin = 40;
 555     m_pageWidth = 0;
 556     m_pageHeight = 0;
 557
 558     printout->OnPreparePrinting();
 559
 560     // Get some parameters from the printout, if defined
 561     int selFrom, selTo;
 562     printout->GetPageInfo(&m_minPage, &m_maxPage, &selFrom, &selTo);
 563 }
 564
 565 wxPrintPreviewBase::~wxPrintPreviewBase()
 566 {
 567     if (m_previewPrintout)
 568         delete m_previewPrintout;
 569     if (m_previewBitmap)
 570         delete m_previewBitmap;
 571     if (m_printPrintout)
 572         delete m_printPrintout;
 573 }
 574
 575 bool wxPrintPreviewBase::SetCurrentPage(int pageNum)
 576 {
 577     if (m_currentPage == pageNum)
 578         return TRUE;
 579
 580     m_currentPage = pageNum;
 581     if (m_previewBitmap)
 582     {
 583         delete m_previewBitmap;
 584         m_previewBitmap = NULL;
 585     }
 586
 587     if (m_previewCanvas)
 588     {
 589         RenderPage(pageNum);
 590         m_previewCanvas->Refresh();
 591     }
 592     return TRUE;
 593 }
 594
 595 bool wxPrintPreviewBase::PaintPage(wxWindow *canvas, wxDC& dc)
 596 {
 597     DrawBlankPage(canvas, dc);
 598
 599     if (!m_previewBitmap)
 600         RenderPage(m_currentPage);
 601
 602     if (!m_previewBitmap)
 603         return FALSE;
 604
 605     if (!canvas)
 606         return FALSE;
 607
 608     int canvasWidth, canvasHeight;
 609     canvas->GetSize(&canvasWidth, &canvasHeight);
 610
 611     double zoomScale = ((float)m_currentZoom/(float)100);
 612     double actualWidth = (zoomScale*m_pageWidth*m_previewScale);
 613     //  float actualHeight = (float)(zoomScale*m_pageHeight*m_previewScale);
 614
 615     int x = (int) ((canvasWidth - actualWidth)/2.0);
 616     if (x < m_leftMargin)
 617         x = m_leftMargin;
 618     int y = m_topMargin;
 619
 620     wxMemoryDC temp_dc;
 621     temp_dc.SelectObject(*m_previewBitmap);
 622
 623     dc.Blit(x, y, m_previewBitmap->GetWidth(), m_previewBitmap->GetHeight(), &temp_dc, 0, 0);
 624
 625     temp_dc.SelectObject(wxNullBitmap);
 626
 627     return TRUE;
 628 }
 629
 630 bool wxPrintPreviewBase::RenderPage(int pageNum)
 631 {
 632     int canvasWidth, canvasHeight;
 633
 634     if (!m_previewCanvas)
 635     {
 636         wxMessageBox(_("wxPrintPreviewBase::RenderPage: must use wxPrintPreviewBase::SetCanvas to let me know about the canvas!"),
 637             _("Print Preview Failure"), wxOK);
 638         return FALSE;
 639     }
 640     m_previewCanvas->GetSize(&canvasWidth, &canvasHeight);
 641
 642     double zoomScale = (m_currentZoom/100.0);
 643     int actualWidth = (int)(zoomScale*m_pageWidth*m_previewScale);
 644     int actualHeight = (int)(zoomScale*m_pageHeight*m_previewScale);
 645
 646     int x = (int)((canvasWidth - actualWidth)/2.0);
 647     if (x < m_leftMargin)
 648         x = m_leftMargin;
 649     //  int y = m_topMargin;
 650
 651
 652     if (!m_previewBitmap)
 653     {
 654         m_previewBitmap = new wxBitmap((int)actualWidth, (int)actualHeight);
 655         if (!m_previewBitmap || !m_previewBitmap->Ok())
 656         {
 657             if (m_previewBitmap)
 658                 delete m_previewBitmap;
 659             wxMessageBox(_("Sorry, not enough memory to create a preview."), _("Print Preview Failure"), wxOK);
 660             return FALSE;
 661         }
 662     }
 663
 664     wxMemoryDC memoryDC;
 665     memoryDC.SelectObject(*m_previewBitmap);
 666
 667     memoryDC.Clear();
 668
 669     m_previewPrintout->SetDC(&memoryDC);
 670     m_previewPrintout->SetPageSizePixels(m_pageWidth, m_pageHeight);
 671
 672     m_previewPrintout->OnBeginPrinting();
 673
 674     if (!m_previewPrintout->OnBeginDocument(m_printDialogData.GetFromPage(), m_printDialogData.GetToPage()))
 675     {
 676         wxMessageBox(_("Could not start document preview."), _("Print Preview Failure"), wxOK);
 677
 678         memoryDC.SelectObject(wxNullBitmap);
 679
 680         delete m_previewBitmap;
 681         return FALSE;
 682     }
 683
 684     m_previewPrintout->OnPrintPage(pageNum);
 685     m_previewPrintout->OnEndDocument();
 686     m_previewPrintout->OnEndPrinting();
 687
 688     m_previewPrintout->SetDC(NULL);
 689
 690     memoryDC.SelectObject(wxNullBitmap);
 691
 692     wxChar buf[200];
 693     if (m_maxPage != 0)
 694         wxSprintf(buf, _("Page %d of %d"), pageNum, m_maxPage);
 695     else
 696         wxSprintf(buf, _("Page %d"), pageNum);
 697
 698     if (m_previewFrame)
 699         m_previewFrame->SetStatusText(buf);
 700
 701     return TRUE;
 702 }
 703
 704
 705 bool wxPrintPreviewBase::DrawBlankPage(wxWindow *canvas, wxDC& dc)
 706 {
 707     int canvasWidth, canvasHeight;
 708     canvas->GetSize(&canvasWidth, &canvasHeight);
 709
 710     float zoomScale = (float)((float)m_currentZoom/(float)100);
 711     float actualWidth = zoomScale*m_pageWidth*m_previewScale;
 712     float actualHeight = zoomScale*m_pageHeight*m_previewScale;
 713
 714     float x = (float)((canvasWidth - actualWidth)/2.0);
 715     if (x < m_leftMargin)
 716         x = (float)m_leftMargin;
 717     float y = (float)m_topMargin;
 718
 719     // Draw shadow, allowing for 1-pixel border AROUND the actual page
 720     int shadowOffset = 4;
 721     dc.SetPen(*wxBLACK_PEN);
 722     dc.SetBrush(*wxBLACK_BRUSH);
 723     /*
 724     dc.DrawRectangle((int)(x-1 + shadowOffset), (int)(y-1 + shadowOffset), (int)(actualWidth+2), (int)(actualHeight+2));
 725     */
 726     dc.DrawRectangle((int)(x + shadowOffset), (int)(y + actualHeight+1), (int)(actualWidth), shadowOffset);
 727     dc.DrawRectangle((int)(x + actualWidth), (int)(y + shadowOffset), shadowOffset, (int)(actualHeight));
 728
 729     // Draw blank page allowing for 1-pixel border AROUND the actual page
 730     dc.SetPen(*wxBLACK_PEN);
 731     dc.SetBrush(*wxWHITE_BRUSH);
 732
 733     /*
 734     wxRegion update_region = canvas->GetUpdateRegion();
 735     wxRect r = update_region.GetBox();
 736
 737       printf( "x: %d y: %d w: %d h: %d.\n", (int)r.x, (int)r.y, (int)r.width, (int)r.height );
 738     */
 739
 740     dc.DrawRectangle((int)(x-2), (int)(y-1), (int)(actualWidth+3), (int)(actualHeight+2));
 741
 742     return TRUE;
 743 }
 744
 745 void wxPrintPreviewBase::SetZoom(int percent)
 746 {
 747     if (m_currentZoom == percent)
 748         return;
 749
 750     m_currentZoom = percent;
 751     if (m_previewBitmap)
 752     {
 753         delete m_previewBitmap;
 754         m_previewBitmap = NULL;
 755     }
 756
 757
 758     if (m_previewCanvas)
 759     {
 760         RenderPage(m_currentPage);
 761         m_previewCanvas->Clear();
 762         m_previewCanvas->Refresh();
 763     }
 764 }
 765