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
   9 // Licence:     wxWindows licence
  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 #include "wx/textdlg.h"
  40 #include "wx/sizer.h"
  41 #endif // !WX_PRECOMP
  42
  43 #include "wx/prntbase.h"
  44 #include "wx/dcprint.h"
  45 #include "wx/printdlg.h"
  46 #include "wx/module.h"
  47
  48 #include <stdlib.h>
  49 #include <string.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.GetKeyCode())
 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( wxT("%d...%d"),
 374                 preview->GetMinPage(), preview->GetMaxPage());
 375             strPage.Printf( wxT("%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     wxBoxSizer *item0 = new wxBoxSizer( wxHORIZONTAL );
 401
 402     int smallButtonWidth = 45;
 403
 404     m_closeButton = new wxButton( this, wxID_PREVIEW_CLOSE, _("&Close"), wxDefaultPosition, wxDefaultSize, 0 );
 405     item0->Add( m_closeButton, 0, wxALIGN_CENTRE|wxALL, 5 );
 406
 407     if (m_buttonFlags & wxPREVIEW_PRINT)
 408     {
 409         m_printButton = new wxButton( this, wxID_PREVIEW_PRINT, _("&Print..."), wxDefaultPosition, wxDefaultSize, 0 );
 410         item0->Add( m_printButton, 0, wxALIGN_CENTRE|wxALL, 5 );
 411     }
 412
 413     if (m_buttonFlags & wxPREVIEW_FIRST)
 414     {
 415         m_firstPageButton = new wxButton( this, wxID_PREVIEW_FIRST, _("|<<"), wxDefaultPosition, wxSize(smallButtonWidth,-1), 0 );
 416         item0->Add( m_firstPageButton, 0, wxALIGN_CENTRE|wxALL, 5 );
 417     }
 418
 419     if (m_buttonFlags & wxPREVIEW_PREVIOUS)
 420     {
 421         m_previousPageButton = new wxButton( this, wxID_PREVIEW_PREVIOUS, _("<<"), wxDefaultPosition, wxSize(smallButtonWidth,-1), 0 );
 422         item0->Add( m_previousPageButton, 0, wxALIGN_CENTRE|wxRIGHT|wxTOP|wxBOTTOM, 5 );
 423     }
 424
 425     if (m_buttonFlags & wxPREVIEW_NEXT)
 426     {
 427         m_nextPageButton = new wxButton( this, wxID_PREVIEW_NEXT, _(">>"), wxDefaultPosition, wxSize(smallButtonWidth,-1), 0 );
 428         item0->Add( m_nextPageButton, 0, wxALIGN_CENTRE|wxRIGHT|wxTOP|wxBOTTOM, 5 );
 429     }
 430
 431     if (m_buttonFlags & wxPREVIEW_LAST)
 432     {
 433         m_lastPageButton = new wxButton( this, wxID_PREVIEW_LAST, _(">>|"), wxDefaultPosition, wxSize(smallButtonWidth,-1), 0 );
 434         item0->Add( m_lastPageButton, 0, wxALIGN_CENTRE|wxRIGHT|wxTOP|wxBOTTOM, 5 );
 435     }
 436
 437     if (m_buttonFlags & wxPREVIEW_GOTO)
 438     {
 439         m_gotoPageButton = new wxButton( this, wxID_PREVIEW_GOTO, _("&Goto..."), wxDefaultPosition, wxDefaultSize, 0 );
 440         item0->Add( m_gotoPageButton, 0, wxALIGN_CENTRE|wxALL, 5 );
 441     }
 442
 443     if (m_buttonFlags & wxPREVIEW_ZOOM)
 444     {
 445         wxString choices[] =
 446         {
 447             wxT("10%"), wxT("15%"), wxT("20%"), wxT("25%"), wxT("30%"), wxT("35%"), wxT("40%"), wxT("45%"), wxT("50%"), wxT("55%"),
 448                 wxT("60%"), wxT("65%"), wxT("70%"), wxT("75%"), wxT("80%"), wxT("85%"), wxT("90%"), wxT("95%"), wxT("100%"), wxT("110%"),
 449                 wxT("120%"), wxT("150%"), wxT("200%")
 450         };
 451         int n = WXSIZEOF(choices);
 452
 453         m_zoomControl = new wxChoice( this, wxID_PREVIEW_ZOOM, wxDefaultPosition, wxSize(70,-1), n, choices, 0 );
 454         item0->Add( m_zoomControl, 0, wxALIGN_CENTRE|wxALL, 5 );
 455         SetZoomControl(m_printPreview->GetZoom());
 456     }
 457
 458     SetSizer(item0);
 459     item0->Fit(this);
 460 }
 461
 462 void wxPreviewControlBar::SetZoomControl(int zoom)
 463 {
 464     wxChar buf[20];
 465     wxSprintf( buf, wxT("%d%%"), zoom );
 466
 467     if (m_zoomControl)
 468         m_zoomControl->SetStringSelection(buf);
 469 }
 470
 471 int wxPreviewControlBar::GetZoomControl()
 472 {
 473     wxChar buf[20];
 474     if (m_zoomControl && (m_zoomControl->GetStringSelection() != wxT("")))
 475     {
 476         wxStrcpy(buf, m_zoomControl->GetStringSelection());
 477         buf[wxStrlen(buf) - 1] = 0;
 478         return (int)wxAtoi(buf);
 479     }
 480     else return 0;
 481 }
 482
 483
 484 /*
 485 * Preview frame
 486 */
 487
 488 BEGIN_EVENT_TABLE(wxPreviewFrame, wxFrame)
 489     EVT_CLOSE(wxPreviewFrame::OnCloseWindow)
 490 END_EVENT_TABLE()
 491
 492 wxPreviewFrame::wxPreviewFrame(wxPrintPreviewBase *preview, wxFrame *parent, const wxString& title,
 493                                const wxPoint& pos, const wxSize& size, long style, const wxString& name):
 494 wxFrame(parent, -1, title, pos, size, style, name)
 495 {
 496     m_printPreview = preview;
 497     m_controlBar = NULL;
 498     m_previewCanvas = NULL;
 499 }
 500
 501 wxPreviewFrame::~wxPreviewFrame()
 502 {
 503 }
 504
 505 void wxPreviewFrame::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 506 {
 507     MakeModal(FALSE);
 508
 509     // Need to delete the printout and the print preview
 510     wxPrintout *printout = m_printPreview->GetPrintout();
 511     if (printout)
 512     {
 513         delete printout;
 514         m_printPreview->SetPrintout(NULL);
 515         m_printPreview->SetCanvas(NULL);
 516         m_printPreview->SetFrame(NULL);
 517     }
 518     delete m_printPreview;
 519
 520     Destroy();
 521 }
 522
 523 void wxPreviewFrame::Initialize()
 524 {
 525     CreateStatusBar();
 526     CreateCanvas();
 527     CreateControlBar();
 528
 529     m_printPreview->SetCanvas(m_previewCanvas);
 530     m_printPreview->SetFrame(this);
 531
 532     wxBoxSizer *item0 = new wxBoxSizer( wxVERTICAL );
 533
 534     item0->Add( m_controlBar, 0, wxGROW|wxALIGN_CENTER_VERTICAL, 5 );
 535     item0->Add( m_previewCanvas, 1, wxGROW|wxALIGN_CENTER_VERTICAL, 5 );
 536
 537     SetAutoLayout( TRUE );
 538     SetSizer( item0 );
 539
 540     MakeModal(TRUE);
 541
 542     Layout();
 543 }
 544
 545 void wxPreviewFrame::CreateCanvas()
 546 {
 547     m_previewCanvas = new wxPreviewCanvas(m_printPreview, this);
 548 }
 549
 550 void wxPreviewFrame::CreateControlBar()
 551 {
 552     long buttons = wxPREVIEW_DEFAULT;
 553     if (m_printPreview->GetPrintoutForPrinting())
 554         buttons |= wxPREVIEW_PRINT;
 555
 556     m_controlBar = new wxPreviewControlBar(m_printPreview, buttons, this, wxPoint(0, 0), wxSize(400, 40));
 557     m_controlBar->CreateButtons();
 558 }
 559
 560 /*
 561 * Print preview
 562 */
 563
 564 wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout,
 565                                        wxPrintout *printoutForPrinting,
 566                                        wxPrintData *data)
 567 {
 568     if (data)
 569         m_printDialogData = (*data);
 570
 571     Init(printout, printoutForPrinting);
 572 }
 573
 574 wxPrintPreviewBase::wxPrintPreviewBase(wxPrintout *printout,
 575                                        wxPrintout *printoutForPrinting,
 576                                        wxPrintDialogData *data)
 577 {
 578     if (data)
 579         m_printDialogData = (*data);
 580
 581     Init(printout, printoutForPrinting);
 582 }
 583
 584 void wxPrintPreviewBase::Init(wxPrintout *printout,
 585                               wxPrintout *printoutForPrinting)
 586 {
 587     m_isOk = TRUE;
 588     m_previewPrintout = printout;
 589     if (m_previewPrintout)
 590         m_previewPrintout->SetIsPreview(TRUE);
 591
 592     m_printPrintout = printoutForPrinting;
 593
 594     m_previewCanvas = NULL;
 595     m_previewFrame = NULL;
 596     m_previewBitmap = NULL;
 597     m_currentPage = 1;
 598     m_currentZoom = 70;
 599     m_topMargin = 40;
 600     m_leftMargin = 40;
 601     m_pageWidth = 0;
 602     m_pageHeight = 0;
 603     m_printingPrepared = FALSE;
 604
 605     // Too soon! Moved to RenderPage.
 606     // printout->OnPreparePrinting();
 607
 608     // Get some parameters from the printout, if defined
 609     int selFrom, selTo;
 610     printout->GetPageInfo(&m_minPage, &m_maxPage, &selFrom, &selTo);
 611 }
 612
 613 wxPrintPreviewBase::~wxPrintPreviewBase()
 614 {
 615     if (m_previewPrintout)
 616         delete m_previewPrintout;
 617     if (m_previewBitmap)
 618         delete m_previewBitmap;
 619     if (m_printPrintout)
 620         delete m_printPrintout;
 621 }
 622
 623 bool wxPrintPreviewBase::SetCurrentPage(int pageNum)
 624 {
 625     if (m_currentPage == pageNum)
 626         return TRUE;
 627
 628     m_currentPage = pageNum;
 629     if (m_previewBitmap)
 630     {
 631         delete m_previewBitmap;
 632         m_previewBitmap = NULL;
 633     }
 634
 635     if (m_previewCanvas)
 636     {
 637         if (!RenderPage(pageNum))
 638             return FALSE;
 639         m_previewCanvas->Refresh();
 640     }
 641     return TRUE;
 642 }
 643
 644 bool wxPrintPreviewBase::PaintPage(wxWindow *canvas, wxDC& dc)
 645 {
 646     DrawBlankPage(canvas, dc);
 647
 648     if (!m_previewBitmap)
 649         if (!RenderPage(m_currentPage))
 650             return FALSE;
 651
 652     if (!m_previewBitmap)
 653         return FALSE;
 654
 655     if (!canvas)
 656         return FALSE;
 657
 658     int canvasWidth, canvasHeight;
 659     canvas->GetSize(&canvasWidth, &canvasHeight);
 660
 661     double zoomScale = ((float)m_currentZoom/(float)100);
 662     double actualWidth = (zoomScale*m_pageWidth*m_previewScale);
 663     //  float actualHeight = (float)(zoomScale*m_pageHeight*m_previewScale);
 664
 665     int x = (int) ((canvasWidth - actualWidth)/2.0);
 666     if (x < m_leftMargin)
 667         x = m_leftMargin;
 668     int y = m_topMargin;
 669
 670     wxMemoryDC temp_dc;
 671     temp_dc.SelectObject(*m_previewBitmap);
 672
 673     dc.Blit(x, y, m_previewBitmap->GetWidth(), m_previewBitmap->GetHeight(), &temp_dc, 0, 0);
 674
 675     temp_dc.SelectObject(wxNullBitmap);
 676
 677     return TRUE;
 678 }
 679
 680 bool wxPrintPreviewBase::RenderPage(int pageNum)
 681 {
 682     wxBusyCursor busy;
 683
 684     int canvasWidth, canvasHeight;
 685
 686     if (!m_previewCanvas)
 687     {
 688         wxFAIL_MSG(_T("wxPrintPreviewBase::RenderPage: must use wxPrintPreviewBase::SetCanvas to let me know about the canvas!"));
 689
 690         return FALSE;
 691     }
 692     m_previewCanvas->GetSize(&canvasWidth, &canvasHeight);
 693
 694     double zoomScale = (m_currentZoom/100.0);
 695     int actualWidth = (int)(zoomScale*m_pageWidth*m_previewScale);
 696     int actualHeight = (int)(zoomScale*m_pageHeight*m_previewScale);
 697
 698     int x = (int)((canvasWidth - actualWidth)/2.0);
 699     if (x < m_leftMargin)
 700         x = m_leftMargin;
 701     //  int y = m_topMargin;
 702
 703
 704     if (!m_previewBitmap)
 705     {
 706         m_previewBitmap = new wxBitmap((int)actualWidth, (int)actualHeight);
 707         if (!m_previewBitmap || !m_previewBitmap->Ok())
 708         {
 709             if (m_previewBitmap) {
 710                 delete m_previewBitmap;
 711                 m_previewBitmap = NULL;
 712             }
 713             wxMessageBox(_("Sorry, not enough memory to create a preview."), _("Print Preview Failure"), wxOK);
 714             return FALSE;
 715         }
 716     }
 717
 718     wxMemoryDC memoryDC;
 719     memoryDC.SelectObject(*m_previewBitmap);
 720
 721     memoryDC.Clear();
 722
 723     m_previewPrintout->SetDC(&memoryDC);
 724     m_previewPrintout->SetPageSizePixels(m_pageWidth, m_pageHeight);
 725
 726     // Need to delay OnPreparePrinting until here, so we have enough information.
 727     if (!m_printingPrepared)
 728     {
 729         m_previewPrintout->OnPreparePrinting();
 730         m_printingPrepared = TRUE;
 731     }
 732
 733     m_previewPrintout->OnBeginPrinting();
 734
 735     if (!m_previewPrintout->OnBeginDocument(m_printDialogData.GetFromPage(), m_printDialogData.GetToPage()))
 736     {
 737         wxMessageBox(_("Could not start document preview."), _("Print Preview Failure"), wxOK);
 738
 739         memoryDC.SelectObject(wxNullBitmap);
 740
 741         delete m_previewBitmap;
 742         m_previewBitmap = NULL;
 743         return FALSE;
 744     }
 745
 746     m_previewPrintout->OnPrintPage(pageNum);
 747     m_previewPrintout->OnEndDocument();
 748     m_previewPrintout->OnEndPrinting();
 749
 750     m_previewPrintout->SetDC(NULL);
 751
 752     memoryDC.SelectObject(wxNullBitmap);
 753
 754     wxChar buf[200];
 755     if (m_maxPage != 0)
 756         wxSprintf(buf, _("Page %d of %d"), pageNum, m_maxPage);
 757     else
 758         wxSprintf(buf, _("Page %d"), pageNum);
 759
 760     if (m_previewFrame)
 761         m_previewFrame->SetStatusText(buf);
 762
 763     return TRUE;
 764 }
 765
 766
 767 bool wxPrintPreviewBase::DrawBlankPage(wxWindow *canvas, wxDC& dc)
 768 {
 769     int canvasWidth, canvasHeight;
 770     canvas->GetSize(&canvasWidth, &canvasHeight);
 771
 772     float zoomScale = (float)((float)m_currentZoom/(float)100);
 773     float actualWidth = zoomScale*m_pageWidth*m_previewScale;
 774     float actualHeight = zoomScale*m_pageHeight*m_previewScale;
 775
 776     float x = (float)((canvasWidth - actualWidth)/2.0);
 777     if (x < m_leftMargin)
 778         x = (float)m_leftMargin;
 779     float y = (float)m_topMargin;
 780
 781     // Draw shadow, allowing for 1-pixel border AROUND the actual page
 782     int shadowOffset = 4;
 783     dc.SetPen(*wxBLACK_PEN);
 784     dc.SetBrush(*wxBLACK_BRUSH);
 785     /*
 786     dc.DrawRectangle((int)(x-1 + shadowOffset), (int)(y-1 + shadowOffset), (int)(actualWidth+2), (int)(actualHeight+2));
 787     */
 788     dc.DrawRectangle((int)(x + shadowOffset), (int)(y + actualHeight+1), (int)(actualWidth), shadowOffset);
 789     dc.DrawRectangle((int)(x + actualWidth), (int)(y + shadowOffset), shadowOffset, (int)(actualHeight));
 790
 791     // Draw blank page allowing for 1-pixel border AROUND the actual page
 792     dc.SetPen(*wxBLACK_PEN);
 793     dc.SetBrush(*wxWHITE_BRUSH);
 794
 795     /*
 796     wxRegion update_region = canvas->GetUpdateRegion();
 797     wxRect r = update_region.GetBox();
 798
 799       printf( "x: %d y: %d w: %d h: %d.\n", (int)r.x, (int)r.y, (int)r.width, (int)r.height );
 800     */
 801
 802     dc.DrawRectangle((int)(x-2), (int)(y-1), (int)(actualWidth+3), (int)(actualHeight+2));
 803
 804     return TRUE;
 805 }
 806
 807 void wxPrintPreviewBase::SetZoom(int percent)
 808 {
 809     if (m_currentZoom == percent)
 810         return;
 811
 812     m_currentZoom = percent;
 813     if (m_previewBitmap)
 814     {
 815         delete m_previewBitmap;
 816         m_previewBitmap = NULL;
 817     }
 818
 819     if (m_previewCanvas)
 820     {
 821         RenderPage(m_currentPage);
 822         ((wxScrolledWindow *) m_previewCanvas)->Scroll(0, 0);
 823         m_previewCanvas->Clear();
 824         m_previewCanvas->Refresh();
 825     }
 826 }
 827
 828 #endif // wxUSE_PRINTING_ARCHITECTURE