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 #include <wx/sizer.h>
  50
  51 #ifdef __WXMSW__
  52     #include "wx/msw/private.h"
  53     #include <commdlg.h>
  54
  55     #ifndef __WIN32__
  56         #include <print.h>
  57     #endif
  58 #endif // __WXMSW__
  59
  60 IMPLEMENT_CLASS(wxPrinterBase, wxObject)
  61 IMPLEMENT_ABSTRACT_CLASS(wxPrintout, wxObject)
  62 IMPLEMENT_CLASS(wxPreviewCanvas, wxWindow)
  63 IMPLEMENT_CLASS(wxPreviewControlBar, wxWindow)
  64 IMPLEMENT_CLASS(wxPreviewFrame, wxFrame)
  65 IMPLEMENT_CLASS(wxPrintPreviewBase, wxObject)
  66
  67 BEGIN_EVENT_TABLE(wxPrintAbortDialog, wxDialog)
  68     EVT_BUTTON(wxID_CANCEL, wxPrintAbortDialog::OnCancel)
  69 END_EVENT_TABLE()
  70
  71 BEGIN_EVENT_TABLE(wxPreviewCanvas, wxScrolledWindow)
  72     EVT_PAINT(wxPreviewCanvas::OnPaint)
  73     EVT_SYS_COLOUR_CHANGED(wxPreviewCanvas::OnSysColourChanged)
  74 END_EVENT_TABLE()
  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     sm_lastError = wxPRINTER_NO_ERROR;
  88 }
  89
  90 wxWindow *wxPrinterBase::sm_abortWindow = (wxWindow *) NULL;
  91 bool wxPrinterBase::sm_abortIt = FALSE;
  92 wxPrinterError wxPrinterBase::sm_lastError = wxPRINTER_NO_ERROR;
  93
  94 wxPrinterBase::~wxPrinterBase()
  95 {
  96 }
  97
  98 void wxPrintAbortDialog::OnCancel(wxCommandEvent& WXUNUSED(event))
  99 {
 100     wxPrinterBase::sm_abortIt = TRUE;
 101     wxPrinterBase::sm_abortWindow->Show(FALSE);
 102     wxPrinterBase::sm_abortWindow->Close(TRUE);
 103     wxPrinterBase::sm_abortWindow = (wxWindow *) NULL;
 104 }
 105
 106 wxWindow *wxPrinterBase::CreateAbortWindow(wxWindow *parent, wxPrintout * printout)
 107 {
 108     wxPrintAbortDialog *dialog = new wxPrintAbortDialog(parent, _("Printing ") , wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE);
 109
 110     wxBoxSizer *button_sizer = new wxBoxSizer( wxVERTICAL );
 111     button_sizer->Add( new wxStaticText(dialog, -1, _("Please wait while printing\n") + printout->GetTitle() ), 0, wxALL, 10 );
 112     button_sizer->Add( new wxButton( dialog, wxID_CANCEL, wxT("Cancel") ), 0, wxALL | wxALIGN_CENTER, 10 );
 113
 114     dialog->SetAutoLayout( TRUE );
 115     dialog->SetSizer( button_sizer );
 116
 117     button_sizer->Fit(dialog);
 118     button_sizer->SetSizeHints (dialog) ;
 119
 120     return dialog;
 121 }
 122
 123 void wxPrinterBase::ReportError(wxWindow *parent, wxPrintout *WXUNUSED(printout), const wxString& 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 ") + m_printoutTitle);
 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::GetColour(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 /*
 206 #ifdef __WXGTK__
 207     if (!GetUpdateRegion().IsEmpty())
 208         dc.SetClippingRegion( GetUpdateRegion() );
 209 #endif
 210 */
 211
 212     if (m_printPreview)
 213     {
 214         m_printPreview->PaintPage(this, dc);
 215     }
 216 }
 217
 218 // Responds to colour changes, and passes event on to children.
 219 void wxPreviewCanvas::OnSysColourChanged(wxSysColourChangedEvent& event)
 220 {
 221     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE));
 222     Refresh();
 223
 224     // Propagate the event to the non-top-level children
 225     wxWindow::OnSysColourChanged(event);
 226 }
 227
 228 /*
 229 * Preview control bar
 230 */
 231
 232 BEGIN_EVENT_TABLE(wxPreviewControlBar, wxPanel)
 233     EVT_BUTTON(wxID_PREVIEW_CLOSE,    wxPreviewControlBar::OnWindowClose)
 234     EVT_BUTTON(wxID_PREVIEW_PRINT,    wxPreviewControlBar::OnPrint)
 235     EVT_BUTTON(wxID_PREVIEW_PREVIOUS, wxPreviewControlBar::OnPreviousButton)
 236     EVT_BUTTON(wxID_PREVIEW_NEXT,     wxPreviewControlBar::OnNextButton)
 237     EVT_BUTTON(wxID_PREVIEW_FIRST,    wxPreviewControlBar::OnFirstButton)
 238     EVT_BUTTON(wxID_PREVIEW_LAST,     wxPreviewControlBar::OnLastButton)
 239     EVT_BUTTON(wxID_PREVIEW_GOTO,     wxPreviewControlBar::OnGotoButton)
 240     EVT_CHAR(wxPreviewControlBar::OnChar)
 241     EVT_CHOICE(wxID_PREVIEW_ZOOM,     wxPreviewControlBar::OnZoom)
 242     EVT_PAINT(wxPreviewControlBar::OnPaint)
 243 END_EVENT_TABLE()
 244
 245 wxPreviewControlBar::wxPreviewControlBar(wxPrintPreviewBase *preview, long buttons,
 246                                          wxWindow *parent, const wxPoint& pos, const wxSize& size,
 247                                          long style, const wxString& name):
 248 wxPanel(parent, -1, pos, size, style, name)
 249 {
 250     m_printPreview = preview;
 251     m_closeButton = (wxButton *) NULL;
 252     m_nextPageButton = (wxButton *) NULL;
 253     m_previousPageButton = (wxButton *) NULL;
 254     m_printButton = (wxButton *) NULL;
 255     m_zoomControl = (wxChoice *) NULL;
 256     m_buttonFlags = buttons;
 257 }
 258
 259 wxPreviewControlBar::~wxPreviewControlBar()
 260 {
 261 }
 262
 263 void wxPreviewControlBar::OnPaint(wxPaintEvent& WXUNUSED(event))
 264 {
 265     wxPaintDC dc(this);
 266
 267     int w, h;
 268     GetSize(&w, &h);
 269     dc.SetPen(*wxBLACK_PEN);
 270     dc.SetBrush(*wxTRANSPARENT_BRUSH);
 271     dc.DrawLine( 0, h-1, w, h-1 );
 272 }
 273
 274 void wxPreviewControlBar::OnWindowClose(wxCommandEvent& WXUNUSED(event))
 275 {
 276     wxPreviewFrame *frame = (wxPreviewFrame *)GetParent();
 277     frame->Close(TRUE);
 278 }
 279
 280 void wxPreviewControlBar::OnPrint(wxCommandEvent& WXUNUSED(event))
 281 {
 282     wxPrintPreviewBase *preview = GetPrintPreview();
 283     preview->Print(TRUE);
 284 }
 285
 286 void wxPreviewControlBar::OnChar(wxKeyEvent &event)
 287 {
 288    switch(event.KeyCode())
 289    {
 290    case WXK_NEXT:
 291       OnNext(); break;
 292    case WXK_PRIOR:
 293       OnPrevious(); break;
 294    case WXK_HOME:
 295       OnFirst(); break;
 296    case WXK_END:
 297       OnLast(); break;
 298    case WXK_TAB:
 299       OnGoto(); break;
 300    default:
 301       event.Skip();
 302    }
 303 }
 304
 305 void wxPreviewControlBar::OnNext(void)
 306 {
 307     wxPrintPreviewBase *preview = GetPrintPreview();
 308     if (preview)
 309     {
 310         int currentPage = preview->GetCurrentPage();
 311         if ((preview->GetMaxPage() > 0) &&
 312             (currentPage < preview->GetMaxPage()) &&
 313             preview->GetPrintout()->HasPage(currentPage + 1))
 314         {
 315             preview->SetCurrentPage(currentPage + 1);
 316         }
 317     }
 318 }
 319
 320 void wxPreviewControlBar::OnPrevious(void)
 321 {
 322     wxPrintPreviewBase *preview = GetPrintPreview();
 323     if (preview)
 324     {
 325         int currentPage = preview->GetCurrentPage();
 326         if ((preview->GetMinPage() > 0) &&
 327             (currentPage > preview->GetMinPage()) &&
 328             preview->GetPrintout()->HasPage(currentPage - 1))
 329         {
 330             preview->SetCurrentPage(currentPage - 1);
 331         }
 332     }
 333 }
 334
 335 void wxPreviewControlBar::OnFirst(void)
 336 {
 337     wxPrintPreviewBase *preview = GetPrintPreview();
 338     if (preview)
 339     {
 340         int currentPage = preview->GetMinPage();
 341         if (preview->GetPrintout()->HasPage(currentPage))
 342         {
 343             preview->SetCurrentPage(currentPage);
 344         }
 345     }
 346 }
 347
 348 void wxPreviewControlBar::OnLast(void)
 349 {
 350     wxPrintPreviewBase *preview = GetPrintPreview();
 351     if (preview)
 352     {
 353         int currentPage = preview->GetMaxPage();
 354         if (preview->GetPrintout()->HasPage(currentPage))
 355         {
 356             preview->SetCurrentPage(currentPage);
 357         }
 358     }
 359 }
 360
 361 void wxPreviewControlBar::OnGoto(void)
 362 {
 363     wxPrintPreviewBase *preview = GetPrintPreview();
 364     if (preview)
 365     {
 366         long currentPage;
 367
 368         if (preview->GetMinPage() > 0)
 369         {
 370             wxString strPrompt;
 371             wxString strPage;
 372
 373             strPrompt.Printf( _("%d...%d"),
 374                 preview->GetMinPage(), preview->GetMaxPage());
 375             strPage.Printf( _("%d"), preview->GetCurrentPage() );
 376
 377             strPage =
 378                 wxGetTextFromUser( strPrompt, _("Goto Page"), strPage);
 379
 380             if ( strPage.ToLong( &currentPage ) )
 381                 if (preview->GetPrintout()->HasPage(currentPage))
 382                 {
 383                     preview->SetCurrentPage(currentPage);
 384                 }
 385         }
 386     }
 387 }
 388
 389 void wxPreviewControlBar::OnZoom(wxCommandEvent& WXUNUSED(event))
 390 {
 391     int zoom = GetZoomControl();
 392     if (GetPrintPreview())
 393         GetPrintPreview()->SetZoom(zoom);
 394 }
 395
 396 void wxPreviewControlBar::CreateButtons()
 397 {
 398     SetSize(0, 0, 400, 40);
 399
 400     /*
 401     #ifdef __WXMSW__
 402     int fontSize = 9;
 403     #else
 404     int fontSize = 10;
 405     #endif
 406
 407       wxFont buttonFont(fontSize, wxSWISS, wxNORMAL, wxBOLD);
 408       SetFont(buttonFont);
 409     */
 410
 411     int buttonWidth = 60;
 412     int buttonNavigation = 30;
 413 #ifdef __WXGTK__
 414     int buttonHeight = -1;
 415 #else
 416     int buttonHeight = 24;
 417 #endif
 418
 419     int x = 5;
 420     int y = 5;
 421
 422 #ifdef __WXMOTIF__
 423     int gap = 15;
 424 #else
 425     int gap = 5;
 426 #endif
 427
 428     m_closeButton = new wxButton(this, wxID_PREVIEW_CLOSE, _("Close"),
 429         wxPoint(x, y), wxSize(buttonWidth, buttonHeight));
 430
 431     x += gap + buttonWidth;
 432
 433     if (m_buttonFlags & wxPREVIEW_PRINT)
 434     {
 435         m_printButton =  new wxButton(this, wxID_PREVIEW_PRINT, _("Print..."), wxPoint(x, y),
 436             wxSize(buttonWidth, buttonHeight));
 437         x += gap + buttonWidth;
 438     }
 439
 440     if (m_buttonFlags & wxPREVIEW_FIRST)
 441     {
 442         m_firstPageButton = new wxButton(this, wxID_PREVIEW_FIRST, wxT("|<<"), wxPoint(x, y),
 443             wxSize(buttonNavigation, buttonHeight));
 444         x += gap + buttonNavigation;
 445     }
 446
 447     if (m_buttonFlags & wxPREVIEW_PREVIOUS)
 448     {
 449         m_previousPageButton = new wxButton(this, wxID_PREVIEW_PREVIOUS, wxT("<<"), wxPoint(x, y),
 450             wxSize(buttonNavigation, buttonHeight));
 451         x += gap + buttonNavigation;
 452     }
 453
 454     if (m_buttonFlags & wxPREVIEW_NEXT)
 455     {
 456         m_nextPageButton = new wxButton(this, wxID_PREVIEW_NEXT, wxT(">>"),
 457             wxPoint(x, y), wxSize(buttonNavigation, buttonHeight));
 458         x += gap + buttonNavigation;
 459     }
 460
 461     if (m_buttonFlags & wxPREVIEW_LAST)
 462     {
 463         m_lastPageButton = new wxButton(this, wxID_PREVIEW_LAST, wxT(">>|"), wxPoint(x, y),
 464             wxSize(buttonNavigation, buttonHeight));
 465         x += gap + buttonNavigation;
 466     }
 467
 468     if (m_buttonFlags & wxPREVIEW_GOTO)
 469     {
 470         m_gotoPageButton = new wxButton(this, wxID_PREVIEW_GOTO, wxT("Goto..."), wxPoint(x, y),
 471             wxSize(buttonWidth, buttonHeight));
 472         x += gap + buttonWidth;
 473     }
 474
 475     if (m_buttonFlags & wxPREVIEW_ZOOM)
 476     {
 477         static const char *choices[] =
 478         {
 479             "10%", "15%", "20%", "25%", "30%", "35%", "40%", "45%", "50%", "55%",
 480             "60%", "65%", "70%", "75%", "80%", "85%", "90%", "95%", "100%", "110%",
 481             "120%", "150%", "200%"
 482         };
 483
 484         int n = WXSIZEOF(choices);
 485
 486         wxString* strings = new wxString[n];
 487         int i;
 488         for (i = 0; i < n; i++ )
 489            strings[i] = choices[i];
 490
 491         m_zoomControl = new wxChoice(this, wxID_PREVIEW_ZOOM,
 492                                      wxPoint(x, y),
 493                                      wxSize(100, -1),
 494                                      n,
 495                                      strings
 496                                     );
 497         delete[] strings;
 498
 499         SetZoomControl(m_printPreview->GetZoom());
 500     }
 501
 502     //  m_closeButton->SetDefault();
 503 }
 504
 505 void wxPreviewControlBar::SetZoomControl(int zoom)
 506 {
 507     char buf[20];
 508     sprintf(buf, "%d%%", zoom);
 509 // Someone is calling methods that do no exist in wxChoice!! So I'll just comment out for VA for now
 510     if (m_zoomControl)
 511         m_zoomControl->SetStringSelection(buf);
 512 }
 513
 514 int wxPreviewControlBar::GetZoomControl()
 515 {
 516     wxChar buf[20];
 517     if (m_zoomControl && (m_zoomControl->GetStringSelection() != wxT("")))
 518     {
 519         wxStrcpy(buf, m_zoomControl->GetStringSelection());
 520         buf[wxStrlen(buf) - 1] = 0;
 521         return (int)wxAtoi(buf);
 522     }
 523     else return 0;
 524 }
 525
 526
 527 /*
 528 * Preview frame
 529 */
 530
 531 BEGIN_EVENT_TABLE(wxPreviewFrame, wxFrame)
 532     EVT_CLOSE(wxPreviewFrame::OnCloseWindow)
 533 END_EVENT_TABLE()
 534
 535 wxPreviewFrame::wxPreviewFrame(wxPrintPreviewBase *preview, wxFrame *parent, const wxString& title,
 536                                const wxPoint& pos, const wxSize& size, long style, const wxString& name):
 537 wxFrame(parent, -1, title, pos, size, style, name)
 538 {
 539     m_printPreview = preview;
 540     m_controlBar = NULL;
 541     m_previewCanvas = NULL;
 542 }
 543
 544 wxPreviewFrame::~wxPreviewFrame()
 545 {
 546 }
 547
 548 void wxPreviewFrame::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 549 {
 550     MakeModal(FALSE);
 551
 552     // Need to delete the printout and the print preview
 553     wxPrintout *printout = m_printPreview->GetPrintout();
 554     if (printout)
 555     {
 556         delete printout;
 557         m_printPreview->SetPrintout(NULL);
 558         m_printPreview->SetCanvas(NULL);
 559         m_printPreview->SetFrame(NULL);
 560     }
 561     delete m_printPreview;
 562
 563     Destroy();
 564 }
 565
 566 void wxPreviewFrame::Initialize()
 567 {
 568     CreateStatusBar();
 569
 570     CreateCanvas();
 571     CreateControlBar();
 572
 573     m_printPreview->SetCanvas(m_previewCanvas);
 574     m_printPreview->SetFrame(this);
 575
 576     // Set layout constraints here
 577
 578     // Control bar constraints
 579     wxLayoutConstraints *c1 = new wxLayoutConstraints;
 580     //  int w, h;
 581     //  m_controlBar->GetSize(&w, &h);
 582     int h;
 583 #if (defined(__WXMSW__) || defined(__WXGTK__))
 584     h = 40;
 585 #else
 586     h = 60;
 587 #endif
 588
 589     c1->left.SameAs       (this, wxLeft);
 590     c1->top.SameAs        (this, wxTop);
 591     c1->right.SameAs      (this, wxRight);
 592     c1->height.Absolute   (h);
 593
 594     m_controlBar->SetConstraints(c1);
 595
 596     // Canvas constraints
 597     wxLayoutConstraints *c2 = new wxLayoutConstraints;
 598
 599     c2->left.SameAs       (this, wxLeft);
 600     c2->top.Below         (m_controlBar);
 601     c2->right.SameAs      (this, wxRight);
 602     c2->bottom.SameAs     (this, wxBottom);
 603
 604     m_previewCanvas->SetConstraints(c2);
 605
 606     SetAutoLayout(TRUE);
 607
 608     MakeModal(TRUE);
 609
 610     Layout();
 611 }
 612
 613 void wxPreviewFrame::CreateCanvas()
 614 {
 615     m_previewCanvas = new wxPreviewCanvas(m_printPreview, this);
 616 }
 617
 618 void wxPreviewFrame::CreateControlBar()
 619 {
 620     long buttons = wxPREVIEW_DEFAULT;
 621     if (m_printPreview->GetPrintoutForPrinting())
 622         buttons |= wxPREVIEW_PRINT;
 623
 624     m_controlBar = new wxPreviewControlBar(m_printPreview, buttons, this, wxPoint(0, 0), wxSize(400, 40));
 625     m_controlBar->CreateButtons();
 626 }
 627
 628 /*
 629 * Print preview
 630 */
 631
 632 wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout,
 633                                        wxPrintout *printoutForPrinting,
 634                                        wxPrintData *data)
 635 {
 636     if (data)
 637         m_printDialogData = (*data);
 638
 639     Init(printout, printoutForPrinting);
 640 }
 641
 642 wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout,
 643                                        wxPrintout *printoutForPrinting,
 644                                        wxPrintDialogData *data)
 645 {
 646     if (data)
 647         m_printDialogData = (*data);
 648
 649     Init(printout, printoutForPrinting);
 650 }
 651
 652 void wxPrintPreviewBase::Init(wxPrintout *printout,
 653                               wxPrintout *printoutForPrinting)
 654 {
 655     m_isOk = TRUE;
 656     m_previewPrintout = printout;
 657     if (m_previewPrintout)
 658         m_previewPrintout->SetIsPreview(TRUE);
 659
 660     m_printPrintout = printoutForPrinting;
 661
 662     m_previewCanvas = NULL;
 663     m_previewFrame = NULL;
 664     m_previewBitmap = NULL;
 665     m_currentPage = 1;
 666     m_currentZoom = 70;
 667     m_topMargin = 40;
 668     m_leftMargin = 40;
 669     m_pageWidth = 0;
 670     m_pageHeight = 0;
 671     m_printingPrepared = FALSE;
 672
 673     // Too soon! Moved to RenderPage.
 674     // printout->OnPreparePrinting();
 675
 676     // Get some parameters from the printout, if defined
 677     int selFrom, selTo;
 678     printout->GetPageInfo(&m_minPage, &m_maxPage, &selFrom, &selTo);
 679 }
 680
 681 wxPrintPreviewBase::~wxPrintPreviewBase()
 682 {
 683     if (m_previewPrintout)
 684         delete m_previewPrintout;
 685     if (m_previewBitmap)
 686         delete m_previewBitmap;
 687     if (m_printPrintout)
 688         delete m_printPrintout;
 689 }
 690
 691 bool wxPrintPreviewBase::SetCurrentPage(int pageNum)
 692 {
 693     if (m_currentPage == pageNum)
 694         return TRUE;
 695
 696     m_currentPage = pageNum;
 697     if (m_previewBitmap)
 698     {
 699         delete m_previewBitmap;
 700         m_previewBitmap = NULL;
 701     }
 702
 703     if (m_previewCanvas)
 704     {
 705         if (!RenderPage(pageNum))
 706             return FALSE;
 707         m_previewCanvas->Refresh();
 708     }
 709     return TRUE;
 710 }
 711
 712 bool wxPrintPreviewBase::PaintPage(wxWindow *canvas, wxDC& dc)
 713 {
 714     DrawBlankPage(canvas, dc);
 715
 716     if (!m_previewBitmap)
 717         if (!RenderPage(m_currentPage))
 718             return FALSE;
 719
 720     if (!m_previewBitmap)
 721         return FALSE;
 722
 723     if (!canvas)
 724         return FALSE;
 725
 726     int canvasWidth, canvasHeight;
 727     canvas->GetSize(&canvasWidth, &canvasHeight);
 728
 729     double zoomScale = ((float)m_currentZoom/(float)100);
 730     double actualWidth = (zoomScale*m_pageWidth*m_previewScale);
 731     //  float actualHeight = (float)(zoomScale*m_pageHeight*m_previewScale);
 732
 733     int x = (int) ((canvasWidth - actualWidth)/2.0);
 734     if (x < m_leftMargin)
 735         x = m_leftMargin;
 736     int y = m_topMargin;
 737
 738     wxMemoryDC temp_dc;
 739     temp_dc.SelectObject(*m_previewBitmap);
 740
 741     dc.Blit(x, y, m_previewBitmap->GetWidth(), m_previewBitmap->GetHeight(), &temp_dc, 0, 0);
 742
 743     temp_dc.SelectObject(wxNullBitmap);
 744
 745     return TRUE;
 746 }
 747
 748 bool wxPrintPreviewBase::RenderPage(int pageNum)
 749 {
 750     wxBusyCursor busy;
 751
 752     int canvasWidth, canvasHeight;
 753
 754     if (!m_previewCanvas)
 755     {
 756         wxFAIL_MSG(_T("wxPrintPreviewBase::RenderPage: must use wxPrintPreviewBase::SetCanvas to let me know about the canvas!"));
 757
 758         return FALSE;
 759     }
 760     m_previewCanvas->GetSize(&canvasWidth, &canvasHeight);
 761
 762     double zoomScale = (m_currentZoom/100.0);
 763     int actualWidth = (int)(zoomScale*m_pageWidth*m_previewScale);
 764     int actualHeight = (int)(zoomScale*m_pageHeight*m_previewScale);
 765
 766     int x = (int)((canvasWidth - actualWidth)/2.0);
 767     if (x < m_leftMargin)
 768         x = m_leftMargin;
 769     //  int y = m_topMargin;
 770
 771
 772     if (!m_previewBitmap)
 773     {
 774         m_previewBitmap = new wxBitmap((int)actualWidth, (int)actualHeight);
 775         if (!m_previewBitmap || !m_previewBitmap->Ok())
 776         {
 777             if (m_previewBitmap) {
 778                 delete m_previewBitmap;
 779                 m_previewBitmap = NULL;
 780             }
 781             wxMessageBox(_("Sorry, not enough memory to create a preview."), _("Print Preview Failure"), wxOK);
 782             return FALSE;
 783         }
 784     }
 785
 786     wxMemoryDC memoryDC;
 787     memoryDC.SelectObject(*m_previewBitmap);
 788
 789     memoryDC.Clear();
 790
 791     m_previewPrintout->SetDC(&memoryDC);
 792     m_previewPrintout->SetPageSizePixels(m_pageWidth, m_pageHeight);
 793
 794     // Need to delay OnPreparePrinting until here, so we have enough information.
 795     if (!m_printingPrepared)
 796     {
 797         m_previewPrintout->OnPreparePrinting();
 798         m_printingPrepared = TRUE;
 799     }
 800
 801     m_previewPrintout->OnBeginPrinting();
 802
 803     if (!m_previewPrintout->OnBeginDocument(m_printDialogData.GetFromPage(), m_printDialogData.GetToPage()))
 804     {
 805         wxMessageBox(_("Could not start document preview."), _("Print Preview Failure"), wxOK);
 806
 807         memoryDC.SelectObject(wxNullBitmap);
 808
 809         delete m_previewBitmap;
 810         m_previewBitmap = NULL;
 811         return FALSE;
 812     }
 813
 814     m_previewPrintout->OnPrintPage(pageNum);
 815     m_previewPrintout->OnEndDocument();
 816     m_previewPrintout->OnEndPrinting();
 817
 818     m_previewPrintout->SetDC(NULL);
 819
 820     memoryDC.SelectObject(wxNullBitmap);
 821
 822     wxChar buf[200];
 823     if (m_maxPage != 0)
 824         wxSprintf(buf, _("Page %d of %d"), pageNum, m_maxPage);
 825     else
 826         wxSprintf(buf, _("Page %d"), pageNum);
 827
 828     if (m_previewFrame)
 829         m_previewFrame->SetStatusText(buf);
 830
 831     return TRUE;
 832 }
 833
 834
 835 bool wxPrintPreviewBase::DrawBlankPage(wxWindow *canvas, wxDC& dc)
 836 {
 837     int canvasWidth, canvasHeight;
 838     canvas->GetSize(&canvasWidth, &canvasHeight);
 839
 840     float zoomScale = (float)((float)m_currentZoom/(float)100);
 841     float actualWidth = zoomScale*m_pageWidth*m_previewScale;
 842     float actualHeight = zoomScale*m_pageHeight*m_previewScale;
 843
 844     float x = (float)((canvasWidth - actualWidth)/2.0);
 845     if (x < m_leftMargin)
 846         x = (float)m_leftMargin;
 847     float y = (float)m_topMargin;
 848
 849     // Draw shadow, allowing for 1-pixel border AROUND the actual page
 850     int shadowOffset = 4;
 851     dc.SetPen(*wxBLACK_PEN);
 852     dc.SetBrush(*wxBLACK_BRUSH);
 853     /*
 854     dc.DrawRectangle((int)(x-1 + shadowOffset), (int)(y-1 + shadowOffset), (int)(actualWidth+2), (int)(actualHeight+2));
 855     */
 856     dc.DrawRectangle((int)(x + shadowOffset), (int)(y + actualHeight+1), (int)(actualWidth), shadowOffset);
 857     dc.DrawRectangle((int)(x + actualWidth), (int)(y + shadowOffset), shadowOffset, (int)(actualHeight));
 858
 859     // Draw blank page allowing for 1-pixel border AROUND the actual page
 860     dc.SetPen(*wxBLACK_PEN);
 861     dc.SetBrush(*wxWHITE_BRUSH);
 862
 863     /*
 864     wxRegion update_region = canvas->GetUpdateRegion();
 865     wxRect r = update_region.GetBox();
 866
 867       printf( "x: %d y: %d w: %d h: %d.\n", (int)r.x, (int)r.y, (int)r.width, (int)r.height );
 868     */
 869
 870     dc.DrawRectangle((int)(x-2), (int)(y-1), (int)(actualWidth+3), (int)(actualHeight+2));
 871
 872     return TRUE;
 873 }
 874
 875 void wxPrintPreviewBase::SetZoom(int percent)
 876 {
 877     if (m_currentZoom == percent)
 878         return;
 879
 880     m_currentZoom = percent;
 881     if (m_previewBitmap)
 882     {
 883         delete m_previewBitmap;
 884         m_previewBitmap = NULL;
 885     }
 886
 887     if (m_previewCanvas)
 888     {
 889         RenderPage(m_currentPage);
 890         ((wxScrolledWindow *) m_previewCanvas)->Scroll(0, 0);
 891         m_previewCanvas->Clear();
 892         m_previewCanvas->Refresh();
 893     }
 894 }
 895
 896 #endif // wxUSE_PRINTING_ARCHITECTURE