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 #ifdef __WXMSW__
  26 #define __GOOD_COMPILER__
  27 #endif
  28
  29 #ifndef WX_PRECOMP
  30 #include "wx/utils.h"
  31 #include "wx/dc.h"
  32 #include "wx/app.h"
  33 #include "wx/msgdlg.h"
  34 #include "wx/layout.h"
  35 #include "wx/choice.h"
  36 #include "wx/button.h"
  37 #include "wx/settings.h"
  38 #include "wx/dcmemory.h"
  39 #include "wx/stattext.h"
  40 #include "wx/intl.h"
  41 #endif
  42
  43 #include "wx/prntbase.h"
  44 #include "wx/dcprint.h"
  45 #include "wx/printdlg.h"
  46
  47 #include <stdlib.h>
  48 #include <string.h>
  49
  50 #ifdef __WXMSW__
  51 #include <windows.h>
  52 #include <commdlg.h>
  53
  54 // Clash with Windows header files
  55 #ifdef StartDoc
  56 #undef StartDoc
  57 #endif
  58
  59 #ifndef __WIN32__
  60 #include <print.h>
  61 #endif
  62
  63 #if !defined(APIENTRY)  // NT defines APIENTRY, 3.x not
  64 #define APIENTRY FAR PASCAL
  65 #endif
  66
  67 #ifdef __WIN32__
  68 #define _EXPORT /**/
  69 #else
  70 #define _EXPORT _export
  71 typedef signed short int SHORT ;
  72 #endif
  73
  74 #if !defined(__WIN32__) // 3.x uses FARPROC for dialogs
  75 #define DLGPROC FARPROC
  76 #endif
  77
  78 LONG APIENTRY _EXPORT wxAbortProc(HDC hPr, int Code);
  79 #endif
  80  // End __WXMSW__
  81
  82 #if !USE_SHARED_LIBRARY
  83 IMPLEMENT_CLASS(wxPrinterBase, wxObject)
  84 IMPLEMENT_ABSTRACT_CLASS(wxPrintout, wxObject)
  85 IMPLEMENT_CLASS(wxPreviewCanvas, wxWindow)
  86 IMPLEMENT_CLASS(wxPreviewControlBar, wxWindow)
  87 IMPLEMENT_CLASS(wxPreviewFrame, wxFrame)
  88 IMPLEMENT_CLASS(wxPrintPreviewBase, wxObject)
  89
  90 BEGIN_EVENT_TABLE(wxPrintAbortDialog, wxDialog)
  91         EVT_BUTTON(wxID_CANCEL, wxPrintAbortDialog::OnCancel)
  92 END_EVENT_TABLE()
  93
  94 BEGIN_EVENT_TABLE(wxPreviewCanvas, wxScrolledWindow)
  95     EVT_PAINT(wxPreviewCanvas::OnPaint)
  96     EVT_SYS_COLOUR_CHANGED(wxPreviewCanvas::OnSysColourChanged)
  97 END_EVENT_TABLE()
  98 #endif
  99
 100 /*
 101  * Printer
 102  */
 103
 104 wxPrinterBase::wxPrinterBase(wxPrintData *data)
 105 {
 106   currentPrintout = (wxPrintout *) NULL;
 107   abortWindow = (wxWindow *) NULL;
 108   abortIt = FALSE;
 109   if (data)
 110     printData = (*data);
 111 }
 112
 113 wxWindow *wxPrinterBase::abortWindow = (wxWindow *) NULL;
 114 bool wxPrinterBase::abortIt = FALSE;
 115
 116 wxPrinterBase::~wxPrinterBase(void)
 117 {
 118 }
 119
 120 void wxPrintAbortDialog::OnCancel(wxCommandEvent& WXUNUSED(event))
 121 {
 122   wxPrinterBase::abortIt = TRUE;
 123   wxPrinterBase::abortWindow->Show(FALSE);
 124   wxPrinterBase::abortWindow->Close(TRUE);
 125   wxPrinterBase::abortWindow = (wxWindow *) NULL;
 126 }
 127
 128 wxWindow *wxPrinterBase::CreateAbortWindow(wxWindow *parent, wxPrintout *WXUNUSED(printout))
 129 {
 130   wxPrintAbortDialog *dialog = new wxPrintAbortDialog(parent, _("Printing"), wxPoint(0, 0), wxSize(400, 400));
 131   (void) new wxStaticText(dialog, -1, _("Please wait..."), wxPoint(5, 5));
 132
 133   wxButton *button = new wxButton(dialog, wxID_CANCEL, _("Cancel"), wxPoint(5, 30));
 134
 135   dialog->Fit();
 136   button->Centre(wxHORIZONTAL);
 137
 138   dialog->Centre();
 139   return dialog;
 140 }
 141
 142 void wxPrinterBase::ReportError(wxWindow *parent, wxPrintout *WXUNUSED(printout), char *message)
 143 {
 144   wxMessageBox(message, _("Printing Error"), wxOK, parent);
 145 }
 146
 147 /*
 148  * Printout class
 149  */
 150
 151 wxPrintout::wxPrintout(const char *title)
 152 {
 153   printoutTitle = title ? copystring(title) : (char *) NULL;
 154   printoutDC = (wxDC *) NULL;
 155   pageWidthMM = 0;
 156   pageHeightMM = 0;
 157   pageWidthPixels = 0;
 158   pageHeightPixels = 0;
 159   PPIScreenX = 0;
 160   PPIScreenY = 0;
 161   PPIPrinterX = 0;
 162   PPIPrinterY = 0;
 163   isPreview = FALSE;
 164 }
 165
 166 wxPrintout::~wxPrintout(void)
 167 {
 168   if (printoutTitle)
 169     delete[] printoutTitle;
 170 }
 171
 172 bool wxPrintout::OnBeginDocument(int WXUNUSED(startPage), int WXUNUSED(endPage))
 173 {
 174   return GetDC()->StartDoc(_("Printing"));
 175 }
 176
 177 void wxPrintout::OnEndDocument(void)
 178 {
 179   GetDC()->EndDoc();
 180 }
 181
 182 void wxPrintout::OnBeginPrinting(void)
 183 {
 184 }
 185
 186 void wxPrintout::OnEndPrinting(void)
 187 {
 188 }
 189
 190 bool wxPrintout::HasPage(int page)
 191 {
 192   return (page == 1);
 193 }
 194
 195 void wxPrintout::GetPageInfo(int *minPage, int *maxPage, int *fromPage, int *toPage)
 196 {
 197   *minPage = 1;
 198   *maxPage = 32000;
 199   *fromPage = 1;
 200   *toPage = 1;
 201 }
 202
 203 /*
 204  * Preview canvas
 205  */
 206
 207 wxPreviewCanvas::wxPreviewCanvas(wxPrintPreviewBase *preview, wxWindow *parent,
 208                 const wxPoint& pos, const wxSize& size, long style, const wxString& name):
 209  wxScrolledWindow(parent, -1, pos, size, style, name)
 210 {
 211   printPreview = preview;
 212   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE));
 213
 214   SetScrollbars(40, 40, 100, 100);
 215 }
 216
 217 wxPreviewCanvas::~wxPreviewCanvas(void)
 218 {
 219 }
 220
 221 void wxPreviewCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))
 222 {
 223   wxPaintDC dc(this);
 224
 225   if (printPreview)
 226   {
 227     printPreview->PaintPage(this, dc);
 228   }
 229 }
 230
 231 // Responds to colour changes, and passes event on to children.
 232 void wxPreviewCanvas::OnSysColourChanged(wxSysColourChangedEvent& event)
 233 {
 234   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE));
 235   Refresh();
 236
 237   // Propagate the event to the non-top-level children
 238   wxWindow::OnSysColourChanged(event);
 239 }
 240
 241 /*
 242  * Preview control bar
 243  */
 244
 245 BEGIN_EVENT_TABLE(wxPreviewControlBar, wxPanel)
 246         EVT_BUTTON(wxID_PREVIEW_CLOSE,          wxPreviewControlBar::OnClose)
 247         EVT_BUTTON(wxID_PREVIEW_PRINT,          wxPreviewControlBar::OnPrint)
 248         EVT_BUTTON(wxID_PREVIEW_PREVIOUS,       wxPreviewControlBar::OnPrevious)
 249         EVT_BUTTON(wxID_PREVIEW_NEXT,           wxPreviewControlBar::OnNext)
 250         EVT_CHOICE(wxID_PREVIEW_ZOOM,           wxPreviewControlBar::OnZoom)
 251     EVT_PAINT(wxPreviewControlBar::OnPaint)
 252 END_EVENT_TABLE()
 253
 254 wxPreviewControlBar::wxPreviewControlBar(wxPrintPreviewBase *preview, long buttons,
 255     wxWindow *parent, const wxPoint& pos, const wxSize& size,
 256     long style, const wxString& name):
 257   wxPanel(parent, -1, pos, size, style, name)
 258 {
 259   printPreview = preview;
 260   closeButton = (wxButton *) NULL;
 261   nextPageButton = (wxButton *) NULL;
 262   previousPageButton = (wxButton *) NULL;
 263   printButton = (wxButton *) NULL;
 264   zoomControl = (wxChoice *) NULL;
 265   buttonFlags = buttons;
 266 }
 267
 268 wxFont *wxPreviewControlBar::buttonFont = (wxFont *) NULL;
 269
 270 wxPreviewControlBar::~wxPreviewControlBar(void)
 271 {
 272 }
 273
 274 void wxPreviewControlBar::OnPaint(wxPaintEvent& WXUNUSED(event))
 275 {
 276   wxPaintDC dc(this);
 277
 278   int w, h;
 279   GetSize(&w, &h);
 280   dc.SetPen(*wxBLACK_PEN);
 281   dc.SetBrush(*wxTRANSPARENT_BRUSH);
 282   dc.DrawLine( 0, h-1, w, h-1 );
 283 }
 284
 285 void wxPreviewControlBar::OnClose(wxCommandEvent& WXUNUSED(event))
 286 {
 287   wxPreviewFrame *frame = (wxPreviewFrame *)GetParent();
 288   frame->Close(TRUE);
 289 }
 290
 291 void wxPreviewControlBar::OnPrint(wxCommandEvent& WXUNUSED(event))
 292 {
 293   wxPrintPreviewBase *preview = GetPrintPreview();
 294   preview->Print(TRUE);
 295 }
 296
 297 void wxPreviewControlBar::OnNext(wxCommandEvent& WXUNUSED(event))
 298 {
 299   wxPrintPreviewBase *preview = GetPrintPreview();
 300   if (preview)
 301   {
 302     int currentPage = preview->GetCurrentPage();
 303     if ((preview->GetMaxPage() > 0) &&
 304         (currentPage < preview->GetMaxPage()) &&
 305         preview->GetPrintout()->HasPage(currentPage + 1))
 306     {
 307       preview->SetCurrentPage(currentPage + 1);
 308     }
 309   }
 310 }
 311
 312 void wxPreviewControlBar::OnPrevious(wxCommandEvent& WXUNUSED(event))
 313 {
 314   wxPrintPreviewBase *preview = GetPrintPreview();
 315   if (preview)
 316   {
 317     int currentPage = preview->GetCurrentPage();
 318     if ((preview->GetMinPage() > 0) &&
 319         (currentPage > preview->GetMinPage()) &&
 320         preview->GetPrintout()->HasPage(currentPage - 1))
 321     {
 322       preview->SetCurrentPage(currentPage - 1);
 323     }
 324   }
 325 }
 326
 327 void wxPreviewControlBar::OnZoom(wxCommandEvent& WXUNUSED(event))
 328 {
 329   int zoom = GetZoomControl();
 330   if (GetPrintPreview())
 331     GetPrintPreview()->SetZoom(zoom);
 332 }
 333
 334 void wxPreviewControlBar::CreateButtons(void)
 335 {
 336 #ifdef __GOOD_COMPILER__ // Robert Roebling
 337
 338   SetSize(0, 0, 400, 40);
 339
 340 #ifdef __WXMSW__
 341   int fontSize = 9;
 342 #else
 343   int fontSize = 10;
 344 #endif
 345
 346   if (!buttonFont)
 347     buttonFont = wxTheFontList->FindOrCreateFont(fontSize, wxSWISS, wxNORMAL, wxBOLD);
 348   SetButtonFont(*buttonFont);
 349
 350   int buttonWidth = 65;
 351   int buttonHeight = 24;
 352
 353   int x = 5;
 354   int y = 5;
 355   int gap = 5;
 356
 357   closeButton = new wxButton(this, wxID_PREVIEW_CLOSE, _("Close"),
 358         wxPoint(x, y), wxSize(buttonWidth, buttonHeight));
 359
 360   x += gap + buttonWidth;
 361
 362   if (buttonFlags & wxPREVIEW_PRINT)
 363   {
 364     printButton =  new wxButton(this, wxID_PREVIEW_PRINT, _("Print..."), wxPoint(x, y),
 365                 wxSize(buttonWidth, buttonHeight));
 366         x += gap + buttonWidth;
 367   }
 368
 369   if (buttonFlags & wxPREVIEW_PREVIOUS)
 370   {
 371     previousPageButton = new wxButton(this, wxID_PREVIEW_PREVIOUS, "<<", wxPoint(x, y),
 372                 wxSize(buttonWidth, buttonHeight));
 373         x += gap + buttonWidth;
 374   }
 375
 376   if (buttonFlags & wxPREVIEW_NEXT)
 377   {
 378     nextPageButton = new wxButton(this, wxID_PREVIEW_NEXT, ">>",
 379                 wxPoint(x, y), wxSize(buttonWidth, buttonHeight));
 380         x += gap + buttonWidth;
 381   }
 382
 383   static wxString choices[] = { "10%", "20%", "25%", "30%", "35%", "40%", "45%", "50%", "55%", "60%",
 384     "65%", "70%", "75%", "80%", "85%", "90%", "95%", "100%", "110%", "120%", "150%", "200%" };
 385   int n = 22;
 386   if (buttonFlags & wxPREVIEW_ZOOM)
 387   {
 388     zoomControl = new wxChoice(this, wxID_PREVIEW_ZOOM, wxPoint(x, y),
 389                 wxSize(100, -1), n, (wxString *)choices);
 390     SetZoomControl(printPreview->GetZoom());
 391   }
 392
 393   closeButton->SetDefault();
 394
 395 #endif
 396 }
 397
 398 void wxPreviewControlBar::SetZoomControl(int zoom)
 399 {
 400 #ifdef __GOOD_COMPILER__ // Robert Roebling
 401   char buf[20];
 402   sprintf(buf, "%d%%", zoom);
 403   if (zoomControl)
 404     zoomControl->SetStringSelection(buf);
 405 #endif
 406 }
 407
 408 int wxPreviewControlBar::GetZoomControl(void)
 409 {
 410 #ifdef __GOOD_COMPILER__ // Robert Roebling
 411   char buf[20];
 412   if (zoomControl && zoomControl->GetStringSelection())
 413   {
 414     strcpy(buf, zoomControl->GetStringSelection());
 415     buf[strlen(buf) - 1] = 0;
 416     return (int)atoi(buf);
 417   }
 418   else return 0;
 419 #else
 420   return 0;
 421 #endif
 422 }
 423
 424
 425 /*
 426  * Preview frame
 427  */
 428
 429 wxPreviewFrame::wxPreviewFrame(wxPrintPreviewBase *preview, wxFrame *parent, const wxString& title,
 430     const wxPoint& pos, const wxSize& size, long style, const wxString& name):
 431  wxFrame(parent, -1, title, pos, size, style, name)
 432 {
 433 #ifdef __GOOD_COMPILER__ // Robert Roebling
 434
 435   printPreview = preview;
 436   controlBar = NULL;
 437   previewCanvas = NULL;
 438 #endif
 439 }
 440
 441 wxPreviewFrame::~wxPreviewFrame(void)
 442 {
 443 }
 444
 445 bool wxPreviewFrame::OnClose(void)
 446 {
 447 #ifdef __GOOD_COMPILER__ // Robert Roebling
 448
 449   MakeModal(FALSE);
 450
 451   // Need to delete the printout and the print preview
 452   wxPrintout *printout = printPreview->GetPrintout();
 453   if (printout)
 454   {
 455     delete printout;
 456     printPreview->SetPrintout(NULL);
 457     printPreview->SetCanvas(NULL);
 458     printPreview->SetFrame(NULL);
 459   }
 460   delete printPreview;
 461   return TRUE;
 462 #else
 463   return FALSE;
 464 #endif
 465 }
 466
 467 void wxPreviewFrame::Initialize(void)
 468 {
 469
 470 #ifdef __GOOD_COMPILER__ // Robert Roebling
 471
 472   CreateStatusBar();
 473
 474   CreateCanvas();
 475   CreateControlBar();
 476
 477   printPreview->SetCanvas(previewCanvas);
 478   printPreview->SetFrame(this);
 479
 480   // Set layout constraints here
 481
 482   // Control bar constraints
 483   wxLayoutConstraints *c1 = new wxLayoutConstraints;
 484 //  int w, h;
 485 //  controlBar->GetSize(&w, &h);
 486   int h;
 487 #ifdef __WXMSW__
 488   h = 40;
 489 #else
 490   h = 60;
 491 #endif
 492
 493   c1->left.SameAs       (this, wxLeft);
 494   c1->top.SameAs        (this, wxTop);
 495   c1->right.SameAs      (this, wxRight);
 496   c1->height.Absolute   (h);
 497
 498   controlBar->SetConstraints(c1);
 499
 500   // Canvas constraints
 501   wxLayoutConstraints *c2 = new wxLayoutConstraints;
 502
 503   c2->left.SameAs       (this, wxLeft);
 504   c2->top.Below         (controlBar);
 505   c2->right.SameAs      (this, wxRight);
 506   c2->bottom.SameAs     (this, wxBottom);
 507
 508   previewCanvas->SetConstraints(c2);
 509
 510   SetAutoLayout(TRUE);
 511
 512   MakeModal(TRUE);
 513
 514   Layout();
 515
 516 #endif
 517 }
 518
 519 void wxPreviewFrame::CreateCanvas(void)
 520 {
 521 #ifdef __GOOD_COMPILER__ // Robert Roebling
 522
 523   previewCanvas = new wxPreviewCanvas(printPreview, this);
 524
 525 #endif
 526 }
 527
 528 void wxPreviewFrame::CreateControlBar(void)
 529 {
 530 #ifdef __GOOD_COMPILER__ // Robert Roebling
 531
 532   long buttons = wxPREVIEW_DEFAULT;
 533   if (printPreview->GetPrintoutForPrinting())
 534     buttons |= wxPREVIEW_PRINT;
 535
 536   controlBar = new wxPreviewControlBar(printPreview, buttons, this, wxPoint(0, 0), wxSize(400, 40));
 537   controlBar->CreateButtons();
 538 #endif
 539 }
 540
 541 /*
 542  * Print preview
 543  */
 544
 545 wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout, wxPrintout *printoutForPrinting, wxPrintData *data)
 546 {
 547
 548 #ifdef __GOOD_COMPILER__ // Robert Roebling
 549
 550   isOk = TRUE;
 551   previewPrintout = printout;
 552   if (previewPrintout)
 553     previewPrintout->SetIsPreview(TRUE);
 554
 555   printPrintout = printoutForPrinting;
 556   if (data)
 557     printData = (*data);
 558
 559   previewCanvas = NULL;
 560   previewFrame = NULL;
 561   previewBitmap = NULL;
 562   currentPage = 1;
 563   currentZoom = 30;
 564   topMargin = 40;
 565   leftMargin = 40;
 566   pageWidth = 0;
 567   pageHeight = 0;
 568
 569   printout->OnPreparePrinting();
 570
 571   // Get some parameters from the printout, if defined
 572   int selFrom, selTo;
 573   printout->GetPageInfo(&minPage, &maxPage, &selFrom, &selTo);
 574
 575 #endif
 576 }
 577
 578 wxPrintPreviewBase::~wxPrintPreviewBase(void)
 579 {
 580 #ifdef __GOOD_COMPILER__ // Robert Roebling
 581
 582   if (previewPrintout)
 583     delete previewPrintout;
 584   if (previewBitmap)
 585     delete previewBitmap;
 586   if (printPrintout)
 587     delete printPrintout;
 588
 589 #endif
 590 }
 591
 592 bool wxPrintPreviewBase::SetCurrentPage(int pageNum)
 593 {
 594 #ifdef __GOOD_COMPILER__ // Robert Roebling
 595   if (currentPage == pageNum)
 596     return TRUE;
 597
 598   currentPage = pageNum;
 599   if (previewBitmap)
 600   {
 601     delete previewBitmap;
 602     previewBitmap = NULL;
 603   }
 604
 605   if (previewCanvas)
 606   {
 607     RenderPage(pageNum);
 608     previewCanvas->Refresh();
 609   }
 610
 611 #endif
 612   return TRUE;
 613 }
 614
 615 bool wxPrintPreviewBase::PaintPage(wxWindow *canvas, wxDC& dc)
 616 {
 617
 618 #ifdef __GOOD_COMPILER__  // Robert Roebling
 619
 620   DrawBlankPage(canvas, dc);
 621
 622   if (!previewBitmap)
 623     RenderPage(currentPage);
 624
 625   if (!previewBitmap)
 626     return FALSE;
 627
 628   if (!canvas)
 629     return FALSE;
 630
 631   int canvasWidth, canvasHeight;
 632   canvas->GetSize(&canvasWidth, &canvasHeight);
 633
 634   float zoomScale = (float)((float)currentZoom/(float)100);
 635   float actualWidth = (float)(zoomScale*pageWidth*previewScale);
 636 //  float actualHeight = (float)(zoomScale*pageHeight*previewScale);
 637
 638   float x = (float)((canvasWidth - actualWidth)/2.0);
 639   if (x < leftMargin)
 640     x = (float)leftMargin;
 641   float y = (float)topMargin;
 642
 643   wxMemoryDC temp_dc;
 644   temp_dc.SelectObject(*previewBitmap);
 645
 646   dc.Blit((float)x, (float)y, (float)previewBitmap->GetWidth(), (float)previewBitmap->GetHeight(), &temp_dc, (float)0, (float)0);
 647
 648   temp_dc.SelectObject(wxNullBitmap);
 649
 650 #endif
 651
 652   return TRUE;
 653 }
 654
 655 bool wxPrintPreviewBase::RenderPage(int pageNum)
 656 {
 657   int canvasWidth, canvasHeight;
 658
 659 #ifdef __GOOD_COMPILER__  // Robert Roebling
 660
 661   if (!previewCanvas)
 662   {
 663     wxMessageBox(_("wxPrintPreviewBase::RenderPage: must use wxPrintPreviewBase::SetCanvas to let me know about the canvas!"),
 664       _("Print Preview Failure"), wxOK);
 665     return FALSE;
 666   }
 667   previewCanvas->GetSize(&canvasWidth, &canvasHeight);
 668
 669   float zoomScale = (float)((float)currentZoom/(float)100);
 670   float actualWidth = (float)(zoomScale*pageWidth*previewScale);
 671   float actualHeight = (float)(zoomScale*pageHeight*previewScale);
 672
 673   float x = (float)((canvasWidth - actualWidth)/2.0);
 674   if (x < leftMargin)
 675     x = (float)leftMargin;
 676 //  float y = topMargin;
 677
 678
 679   if (!previewBitmap)
 680   {
 681     previewBitmap = new wxBitmap((int)actualWidth, (int)actualHeight);
 682     if (!previewBitmap || !previewBitmap->Ok())
 683     {
 684       if (previewBitmap)
 685         delete previewBitmap;
 686       wxMessageBox(_("Sorry, not enough memory to create a preview."), _("Print Preview Failure"), wxOK);
 687       return FALSE;
 688     }
 689   }
 690
 691   wxMemoryDC memoryDC;
 692   memoryDC.SelectObject(*previewBitmap);
 693
 694   memoryDC.Clear();
 695
 696   previewPrintout->SetDC(&memoryDC);
 697   previewPrintout->SetPageSizePixels(pageWidth, pageHeight);
 698
 699   previewPrintout->OnBeginPrinting();
 700
 701
 702   if (!previewPrintout->OnBeginDocument(printData.GetFromPage(), printData.GetToPage()))
 703   {
 704     wxMessageBox(_("Could not start document preview."), _("Print Preview Failure"), wxOK);
 705
 706     memoryDC.SelectObject(wxNullBitmap);
 707
 708     delete previewBitmap;
 709     return FALSE;
 710   }
 711
 712   previewPrintout->OnPrintPage(pageNum);
 713   previewPrintout->OnEndDocument();
 714   previewPrintout->OnEndPrinting();
 715
 716   previewPrintout->SetDC(NULL);
 717
 718   memoryDC.SelectObject(wxNullBitmap);
 719 #endif
 720
 721   char buf[200];
 722   if (maxPage != 0)
 723     sprintf(buf, _("Page %d of %d"), pageNum, maxPage);
 724   else
 725     sprintf(buf, _("Page %d"), pageNum);
 726
 727   if (previewFrame)
 728     previewFrame->SetStatusText(buf);
 729
 730   return TRUE;
 731 }
 732
 733
 734 bool wxPrintPreviewBase::DrawBlankPage(wxWindow *canvas, wxDC& dc)
 735 {
 736
 737 #ifdef __GOOD_COMPILER__ // Robert Roebling
 738
 739   int canvasWidth, canvasHeight;
 740   canvas->GetSize(&canvasWidth, &canvasHeight);
 741
 742   float zoomScale = (float)((float)currentZoom/(float)100);
 743   float actualWidth = zoomScale*pageWidth*previewScale;
 744   float actualHeight = zoomScale*pageHeight*previewScale;
 745
 746   float x = (float)((canvasWidth - actualWidth)/2.0);
 747   if (x < leftMargin)
 748     x = (float)leftMargin;
 749   float y = (float)topMargin;
 750
 751   // Draw shadow, allowing for 1-pixel border AROUND the actual page
 752   int shadowOffset = 4;
 753   dc.SetPen(*wxBLACK_PEN);
 754   dc.SetBrush(*wxBLACK_BRUSH);
 755   dc.DrawRectangle(x-1 + shadowOffset, y-1 + shadowOffset, actualWidth+2, actualHeight+2);
 756
 757   // Draw blank page allowing for 1-pixel border AROUND the actual page
 758   dc.SetPen(*wxBLACK_PEN);
 759   dc.SetBrush(*wxWHITE_BRUSH);
 760
 761
 762   dc.DrawRectangle(x-1, y-1, actualWidth+2, actualHeight+2);
 763
 764 #endif
 765
 766   return TRUE;
 767 }
 768
 769 void wxPrintPreviewBase::SetZoom(int percent)
 770 {
 771 #ifdef __GOOD_COMPILER__ // Robert Roebling
 772   if (currentZoom == percent)
 773     return;
 774
 775   currentZoom = percent;
 776   if (previewBitmap)
 777   {
 778     delete previewBitmap;
 779     previewBitmap = NULL;
 780   }
 781   RenderPage(currentPage);
 782
 783   if (previewCanvas)
 784   {
 785     previewCanvas->Clear();
 786     previewCanvas->Refresh();
 787   }
 788 #endif
 789
 790 }