src/msw/printwin.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/printwin.cpp
   3 // Purpose:     wxWindowsPrinter framework
   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 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 // Don't use the Windows printer if we're in wxUniv mode and using
  28 // the PostScript architecture
  29 #if wxUSE_PRINTING_ARCHITECTURE && (!defined(__WXUNIVERSAL__) || !wxUSE_POSTSCRIPT_ARCHITECTURE_IN_MSW)
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/msw/wrapcdlg.h"
  33     #include "wx/window.h"
  34     #include "wx/msw/private.h"
  35     #include "wx/utils.h"
  36     #include "wx/dc.h"
  37     #include "wx/app.h"
  38     #include "wx/msgdlg.h"
  39     #include "wx/intl.h"
  40     #include "wx/log.h"
  41     #include "wx/dcprint.h"
  42     #include "wx/dcmemory.h"
  43     #include "wx/image.h"
  44 #endif
  45
  46 #include "wx/msw/dib.h"
  47 #include "wx/msw/dcmemory.h"
  48 #include "wx/msw/printwin.h"
  49 #include "wx/msw/printdlg.h"
  50 #include "wx/msw/private.h"
  51 #include "wx/msw/dcprint.h"
  52 #if wxUSE_ENH_METAFILE
  53     #include "wx/msw/enhmeta.h"
  54 #endif
  55 #include <stdlib.h>
  56
  57 // ---------------------------------------------------------------------------
  58 // private functions
  59 // ---------------------------------------------------------------------------
  60
  61 BOOL CALLBACK wxAbortProc(HDC hdc, int error);
  62
  63 // ---------------------------------------------------------------------------
  64 // wxWin macros
  65 // ---------------------------------------------------------------------------
  66
  67     IMPLEMENT_DYNAMIC_CLASS(wxWindowsPrinter, wxPrinterBase)
  68     IMPLEMENT_CLASS(wxWindowsPrintPreview, wxPrintPreviewBase)
  69
  70 // ===========================================================================
  71 // implementation
  72 // ===========================================================================
  73
  74 // ---------------------------------------------------------------------------
  75 // Printer
  76 // ---------------------------------------------------------------------------
  77
  78 wxWindowsPrinter::wxWindowsPrinter(wxPrintDialogData *data)
  79                 : wxPrinterBase(data)
  80 {
  81 }
  82
  83 bool wxWindowsPrinter::Print(wxWindow *parent, wxPrintout *printout, bool prompt)
  84 {
  85     sm_abortIt = false;
  86     sm_abortWindow = NULL;
  87
  88     if (!printout)
  89     {
  90         sm_lastError = wxPRINTER_ERROR;
  91         return false;
  92     }
  93
  94     if (m_printDialogData.GetMinPage() < 1)
  95         m_printDialogData.SetMinPage(1);
  96     if (m_printDialogData.GetMaxPage() < 1)
  97         m_printDialogData.SetMaxPage(9999);
  98
  99     // Create a suitable device context
 100     wxPrinterDC *dc wxDUMMY_INITIALIZE(NULL);
 101     if (prompt)
 102     {
 103         dc = wxDynamicCast(PrintDialog(parent), wxPrinterDC);
 104         if (!dc)
 105             return false;
 106     }
 107     else
 108     {
 109         dc = new wxPrinterDC(m_printDialogData.GetPrintData());
 110     }
 111
 112     // May have pressed cancel.
 113     if (!dc || !dc->IsOk())
 114     {
 115         if (dc) delete dc;
 116         return false;
 117     }
 118
 119     wxPrinterDCImpl *impl = (wxPrinterDCImpl*) dc->GetImpl();
 120
 121     HDC hdc = ::GetDC(NULL);
 122     int logPPIScreenX = ::GetDeviceCaps(hdc, LOGPIXELSX);
 123     int logPPIScreenY = ::GetDeviceCaps(hdc, LOGPIXELSY);
 124     ::ReleaseDC(NULL, hdc);
 125
 126     int logPPIPrinterX = ::GetDeviceCaps((HDC) impl->GetHDC(), LOGPIXELSX);
 127     int logPPIPrinterY = ::GetDeviceCaps((HDC) impl->GetHDC(), LOGPIXELSY);
 128     if (logPPIPrinterX == 0 || logPPIPrinterY == 0)
 129     {
 130         delete dc;
 131         sm_lastError = wxPRINTER_ERROR;
 132         return false;
 133     }
 134
 135     printout->SetPPIScreen(logPPIScreenX, logPPIScreenY);
 136     printout->SetPPIPrinter(logPPIPrinterX, logPPIPrinterY);
 137
 138     // Set printout parameters
 139     printout->SetDC(dc);
 140
 141     int w, h;
 142     dc->GetSize(&w, &h);
 143     printout->SetPageSizePixels((int)w, (int)h);
 144     printout->SetPaperRectPixels(dc->GetPaperRect());
 145
 146     dc->GetSizeMM(&w, &h);
 147     printout->SetPageSizeMM((int)w, (int)h);
 148
 149     // Create an abort window
 150     wxBusyCursor busyCursor;
 151
 152     printout->OnPreparePrinting();
 153
 154     // Get some parameters from the printout, if defined
 155     int fromPage, toPage;
 156     int minPage, maxPage;
 157     printout->GetPageInfo(&minPage, &maxPage, &fromPage, &toPage);
 158
 159     if (maxPage == 0)
 160     {
 161         sm_lastError = wxPRINTER_ERROR;
 162         return false;
 163     }
 164
 165     // Only set min and max, because from and to have been
 166     // set by the user
 167     m_printDialogData.SetMinPage(minPage);
 168     m_printDialogData.SetMaxPage(maxPage);
 169
 170     wxWindow *win = CreateAbortWindow(parent, printout);
 171     wxYield();
 172
 173     ::SetAbortProc(GetHdcOf(*impl), wxAbortProc);
 174
 175     if (!win)
 176     {
 177         wxLogDebug(wxT("Could not create an abort dialog."));
 178         sm_lastError = wxPRINTER_ERROR;
 179
 180         delete dc;
 181         return false;
 182     }
 183     sm_abortWindow = win;
 184     sm_abortWindow->Show();
 185     wxSafeYield();
 186
 187     printout->OnBeginPrinting();
 188
 189     sm_lastError = wxPRINTER_NO_ERROR;
 190
 191     int minPageNum = minPage, maxPageNum = maxPage;
 192
 193     if ( !m_printDialogData.GetAllPages() )
 194     {
 195         minPageNum = m_printDialogData.GetFromPage();
 196         maxPageNum = m_printDialogData.GetToPage();
 197     }
 198
 199     int copyCount;
 200     for ( copyCount = 1;
 201           copyCount <= m_printDialogData.GetNoCopies();
 202           copyCount++ )
 203     {
 204         if ( !printout->OnBeginDocument(minPageNum, maxPageNum) )
 205         {
 206             wxLogError(_("Could not start printing."));
 207             sm_lastError = wxPRINTER_ERROR;
 208             break;
 209         }
 210         if (sm_abortIt)
 211         {
 212             sm_lastError = wxPRINTER_CANCELLED;
 213             break;
 214         }
 215
 216         int pn;
 217
 218         for ( pn = minPageNum;
 219               pn <= maxPageNum && printout->HasPage(pn);
 220               pn++ )
 221         {
 222             if ( sm_abortIt )
 223             {
 224                 sm_lastError = wxPRINTER_CANCELLED;
 225                 break;
 226             }
 227
 228             dc->StartPage();
 229             bool cont = printout->OnPrintPage(pn);
 230             dc->EndPage();
 231
 232             if ( !cont )
 233             {
 234                 sm_lastError = wxPRINTER_CANCELLED;
 235                 break;
 236             }
 237         }
 238
 239         printout->OnEndDocument();
 240     }
 241
 242     printout->OnEndPrinting();
 243
 244     if (sm_abortWindow)
 245     {
 246         sm_abortWindow->Show(false);
 247         wxDELETE(sm_abortWindow);
 248     }
 249
 250     delete dc;
 251
 252     return sm_lastError == wxPRINTER_NO_ERROR;
 253 }
 254
 255 wxDC *wxWindowsPrinter::PrintDialog(wxWindow *parent)
 256 {
 257     wxDC *dc = NULL;
 258
 259     wxWindowsPrintDialog dialog(parent, & m_printDialogData);
 260     int ret = dialog.ShowModal();
 261
 262     if (ret == wxID_OK)
 263     {
 264         dc = dialog.GetPrintDC();
 265         m_printDialogData = dialog.GetPrintDialogData();
 266         if (dc == NULL)
 267             sm_lastError = wxPRINTER_ERROR;
 268         else
 269             sm_lastError = wxPRINTER_NO_ERROR;
 270     }
 271     else
 272         sm_lastError = wxPRINTER_CANCELLED;
 273
 274     return dc;
 275 }
 276
 277 bool wxWindowsPrinter::Setup(wxWindow *WXUNUSED(parent))
 278 {
 279 #if 0
 280     // We no longer expose that dialog
 281     wxPrintDialog dialog(parent, & m_printDialogData);
 282     dialog.GetPrintDialogData().SetSetupDialog(true);
 283
 284     int ret = dialog.ShowModal();
 285
 286     if (ret == wxID_OK)
 287     {
 288         m_printDialogData = dialog.GetPrintDialogData();
 289     }
 290
 291     return (ret == wxID_OK);
 292 #else
 293     return false;
 294 #endif
 295 }
 296
 297 /*
 298 * Print preview
 299 */
 300
 301 wxWindowsPrintPreview::wxWindowsPrintPreview(wxPrintout *printout,
 302                                              wxPrintout *printoutForPrinting,
 303                                              wxPrintDialogData *data)
 304                      : wxPrintPreviewBase(printout, printoutForPrinting, data)
 305 {
 306     DetermineScaling();
 307 }
 308
 309 wxWindowsPrintPreview::wxWindowsPrintPreview(wxPrintout *printout,
 310                                              wxPrintout *printoutForPrinting,
 311                                              wxPrintData *data)
 312                      : wxPrintPreviewBase(printout, printoutForPrinting, data)
 313 {
 314     DetermineScaling();
 315 }
 316
 317 wxWindowsPrintPreview::~wxWindowsPrintPreview()
 318 {
 319 }
 320
 321 bool wxWindowsPrintPreview::Print(bool interactive)
 322 {
 323     if (!m_printPrintout)
 324         return false;
 325     wxWindowsPrinter printer(&m_printDialogData);
 326     return printer.Print(m_previewFrame, m_printPrintout, interactive);
 327 }
 328
 329 void wxWindowsPrintPreview::DetermineScaling()
 330 {
 331     ScreenHDC dc;
 332     int logPPIScreenX = ::GetDeviceCaps(dc, LOGPIXELSX);
 333     int logPPIScreenY = ::GetDeviceCaps(dc, LOGPIXELSY);
 334     m_previewPrintout->SetPPIScreen(logPPIScreenX, logPPIScreenY);
 335
 336     // Get a device context for the currently selected printer
 337     wxPrinterDC printerDC(m_printDialogData.GetPrintData());
 338
 339     int printerWidthMM;
 340     int printerHeightMM;
 341     int printerXRes;
 342     int printerYRes;
 343     int logPPIPrinterX;
 344     int logPPIPrinterY;
 345
 346     wxRect paperRect;
 347
 348     if ( printerDC.IsOk() )
 349     {
 350         wxPrinterDCImpl *impl = (wxPrinterDCImpl*) printerDC.GetImpl();
 351         HDC dc = GetHdcOf(*impl);
 352         printerWidthMM = ::GetDeviceCaps(dc, HORZSIZE);
 353         printerHeightMM = ::GetDeviceCaps(dc, VERTSIZE);
 354         printerXRes = ::GetDeviceCaps(dc, HORZRES);
 355         printerYRes = ::GetDeviceCaps(dc, VERTRES);
 356         logPPIPrinterX = ::GetDeviceCaps(dc, LOGPIXELSX);
 357         logPPIPrinterY = ::GetDeviceCaps(dc, LOGPIXELSY);
 358
 359         paperRect = printerDC.GetPaperRect();
 360
 361         if ( logPPIPrinterX == 0 ||
 362                 logPPIPrinterY == 0 ||
 363                     printerWidthMM == 0 ||
 364                         printerHeightMM == 0 )
 365         {
 366             m_isOk = false;
 367         }
 368     }
 369     else
 370     {
 371         // use some defaults
 372         printerWidthMM = 150;
 373         printerHeightMM = 250;
 374         printerXRes = 1500;
 375         printerYRes = 2500;
 376         logPPIPrinterX = 600;
 377         logPPIPrinterY = 600;
 378
 379         paperRect = wxRect(0, 0, printerXRes, printerYRes);
 380         m_isOk = false;
 381     }
 382     m_pageWidth = printerXRes;
 383     m_pageHeight = printerYRes;
 384     m_previewPrintout->SetPageSizePixels(printerXRes, printerYRes);
 385     m_previewPrintout->SetPageSizeMM(printerWidthMM, printerHeightMM);
 386     m_previewPrintout->SetPaperRectPixels(paperRect);
 387     m_previewPrintout->SetPPIPrinter(logPPIPrinterX, logPPIPrinterY);
 388
 389     // At 100%, the page should look about page-size on the screen.
 390     m_previewScaleX = float(logPPIScreenX) / logPPIPrinterX;
 391     m_previewScaleY = float(logPPIScreenY) / logPPIPrinterY;
 392 }
 393
 394 #if wxUSE_ENH_METAFILE
 395 bool wxWindowsPrintPreview::RenderPageIntoBitmap(wxBitmap& bmp, int pageNum)
 396 {
 397     // The preview, as implemented in wxPrintPreviewBase (and as used prior to
 398     // wx3) is inexact: it uses screen DC, which has much lower resolution and
 399     // has other properties different from printer DC, so the preview is not
 400     // quite right.
 401     //
 402     // To make matters worse, if the application depends heavily on
 403     // GetTextExtent() or does text layout itself, the output in preview and on
 404     // paper can be very different. In particular, wxHtmlEasyPrinting is
 405     // affected and the preview can be easily off by several pages.
 406     //
 407     // To fix this, we render the preview into high-resolution enhanced
 408     // metafile with properties identical to the printer DC. This guarantees
 409     // metrics correctness while still being fast.
 410
 411
 412     // print the preview into a metafile:
 413     wxPrinterDC printerDC(m_printDialogData.GetPrintData());
 414     wxEnhMetaFileDC metaDC(printerDC,
 415                            wxEmptyString,
 416                            printerDC.GetSize().x, printerDC.GetSize().y);
 417
 418     if ( !RenderPageIntoDC(metaDC, pageNum) )
 419         return false;
 420
 421     wxEnhMetaFile *metafile = metaDC.Close();
 422     if ( !metafile )
 423         return false;
 424
 425     // now render the metafile:
 426     wxMemoryDC bmpDC;
 427     bmpDC.SelectObject(bmp);
 428     bmpDC.Clear();
 429
 430     wxRect outRect(0, 0, bmp.GetWidth(), bmp.GetHeight());
 431     metafile->Play(&bmpDC, &outRect);
 432
 433
 434     delete metafile;
 435
 436     // TODO: we should keep the metafile and reuse it when changing zoom level
 437
 438     return true;
 439 }
 440 #endif // wxUSE_ENH_METAFILE
 441
 442 BOOL CALLBACK wxAbortProc(HDC WXUNUSED(hdc), int WXUNUSED(error))
 443 {
 444     MSG msg;
 445
 446     if (!wxPrinterBase::sm_abortWindow)              /* If the abort dialog isn't up yet */
 447         return(TRUE);
 448
 449     /* Process messages intended for the abort dialog box */
 450
 451     while (!wxPrinterBase::sm_abortIt && ::PeekMessage(&msg, 0, 0, 0, TRUE))
 452         if (!IsDialogMessage((HWND) wxPrinterBase::sm_abortWindow->GetHWND(), &msg)) {
 453             TranslateMessage(&msg);
 454             DispatchMessage(&msg);
 455         }
 456
 457     /* bAbort is TRUE (return is FALSE) if the user has aborted */
 458
 459     return !wxPrinterBase::sm_abortIt;
 460 }
 461
 462 #endif
 463     // wxUSE_PRINTING_ARCHITECTURE