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 #include "wx/msw/enhmeta.h"
  53
  54 #include <stdlib.h>
  55
  56 // ---------------------------------------------------------------------------
  57 // private functions
  58 // ---------------------------------------------------------------------------
  59
  60 BOOL CALLBACK wxAbortProc(HDC hdc, int error);
  61
  62 // ---------------------------------------------------------------------------
  63 // wxWin macros
  64 // ---------------------------------------------------------------------------
  65
  66     IMPLEMENT_DYNAMIC_CLASS(wxWindowsPrinter, wxPrinterBase)
  67     IMPLEMENT_CLASS(wxWindowsPrintPreview, wxPrintPreviewBase)
  68
  69 // ===========================================================================
  70 // implementation
  71 // ===========================================================================
  72
  73 // ---------------------------------------------------------------------------
  74 // Printer
  75 // ---------------------------------------------------------------------------
  76
  77 wxWindowsPrinter::wxWindowsPrinter(wxPrintDialogData *data)
  78                 : wxPrinterBase(data)
  79 {
  80 }
  81
  82 bool wxWindowsPrinter::Print(wxWindow *parent, wxPrintout *printout, bool prompt)
  83 {
  84     sm_abortIt = false;
  85     sm_abortWindow = NULL;
  86
  87     if (!printout)
  88     {
  89         sm_lastError = wxPRINTER_ERROR;
  90         return false;
  91     }
  92
  93     if (m_printDialogData.GetMinPage() < 1)
  94         m_printDialogData.SetMinPage(1);
  95     if (m_printDialogData.GetMaxPage() < 1)
  96         m_printDialogData.SetMaxPage(9999);
  97
  98     // Create a suitable device context
  99     wxPrinterDC *dc wxDUMMY_INITIALIZE(NULL);
 100     if (prompt)
 101     {
 102         dc = wxDynamicCast(PrintDialog(parent), wxPrinterDC);
 103         if (!dc)
 104             return false;
 105     }
 106     else
 107     {
 108         dc = new wxPrinterDC(m_printDialogData.GetPrintData());
 109     }
 110
 111     // May have pressed cancel.
 112     if (!dc || !dc->IsOk())
 113     {
 114         if (dc) delete dc;
 115         return false;
 116     }
 117
 118     wxPrinterDCImpl *impl = (wxPrinterDCImpl*) dc->GetImpl();
 119
 120     HDC hdc = ::GetDC(NULL);
 121     int logPPIScreenX = ::GetDeviceCaps(hdc, LOGPIXELSX);
 122     int logPPIScreenY = ::GetDeviceCaps(hdc, LOGPIXELSY);
 123     ::ReleaseDC(NULL, hdc);
 124
 125     int logPPIPrinterX = ::GetDeviceCaps((HDC) impl->GetHDC(), LOGPIXELSX);
 126     int logPPIPrinterY = ::GetDeviceCaps((HDC) impl->GetHDC(), LOGPIXELSY);
 127     if (logPPIPrinterX == 0 || logPPIPrinterY == 0)
 128     {
 129         delete dc;
 130         sm_lastError = wxPRINTER_ERROR;
 131         return false;
 132     }
 133
 134     printout->SetPPIScreen(logPPIScreenX, logPPIScreenY);
 135     printout->SetPPIPrinter(logPPIPrinterX, logPPIPrinterY);
 136
 137     // Set printout parameters
 138     printout->SetDC(dc);
 139
 140     int w, h;
 141     dc->GetSize(&w, &h);
 142     printout->SetPageSizePixels((int)w, (int)h);
 143     printout->SetPaperRectPixels(dc->GetPaperRect());
 144
 145     dc->GetSizeMM(&w, &h);
 146     printout->SetPageSizeMM((int)w, (int)h);
 147
 148     // Create an abort window
 149     wxBusyCursor busyCursor;
 150
 151     printout->OnPreparePrinting();
 152
 153     // Get some parameters from the printout, if defined
 154     int fromPage, toPage;
 155     int minPage, maxPage;
 156     printout->GetPageInfo(&minPage, &maxPage, &fromPage, &toPage);
 157
 158     if (maxPage == 0)
 159     {
 160         sm_lastError = wxPRINTER_ERROR;
 161         return false;
 162     }
 163
 164     // Only set min and max, because from and to have been
 165     // set by the user
 166     m_printDialogData.SetMinPage(minPage);
 167     m_printDialogData.SetMaxPage(maxPage);
 168
 169     wxWindow *win = CreateAbortWindow(parent, printout);
 170     wxYield();
 171
 172     ::SetAbortProc(GetHdcOf(*impl), wxAbortProc);
 173
 174     if (!win)
 175     {
 176         wxLogDebug(wxT("Could not create an abort dialog."));
 177         sm_lastError = wxPRINTER_ERROR;
 178
 179         delete dc;
 180         return false;
 181     }
 182     sm_abortWindow = win;
 183     sm_abortWindow->Show();
 184     wxSafeYield();
 185
 186     printout->OnBeginPrinting();
 187
 188     sm_lastError = wxPRINTER_NO_ERROR;
 189
 190     int minPageNum = minPage, maxPageNum = maxPage;
 191
 192     if ( !m_printDialogData.GetAllPages() )
 193     {
 194         minPageNum = m_printDialogData.GetFromPage();
 195         maxPageNum = m_printDialogData.GetToPage();
 196     }
 197
 198     int copyCount;
 199     for ( copyCount = 1;
 200           copyCount <= m_printDialogData.GetNoCopies();
 201           copyCount++ )
 202     {
 203         if ( !printout->OnBeginDocument(minPageNum, maxPageNum) )
 204         {
 205             wxLogError(_("Could not start printing."));
 206             sm_lastError = wxPRINTER_ERROR;
 207             break;
 208         }
 209         if (sm_abortIt)
 210         {
 211             sm_lastError = wxPRINTER_CANCELLED;
 212             break;
 213         }
 214
 215         int pn;
 216
 217         for ( pn = minPageNum;
 218               pn <= maxPageNum && printout->HasPage(pn);
 219               pn++ )
 220         {
 221             if ( sm_abortIt )
 222             {
 223                 sm_lastError = wxPRINTER_CANCELLED;
 224                 break;
 225             }
 226
 227             dc->StartPage();
 228             bool cont = printout->OnPrintPage(pn);
 229             dc->EndPage();
 230
 231             if ( !cont )
 232             {
 233                 sm_lastError = wxPRINTER_CANCELLED;
 234                 break;
 235             }
 236         }
 237
 238         printout->OnEndDocument();
 239     }
 240
 241     printout->OnEndPrinting();
 242
 243     if (sm_abortWindow)
 244     {
 245         sm_abortWindow->Show(false);
 246         delete sm_abortWindow;
 247         sm_abortWindow = NULL;
 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 bool wxWindowsPrintPreview::RenderPageIntoBitmap(wxBitmap& bmp, int pageNum)
 395 {
 396     // The preview, as implemented in wxPrintPreviewBase (and as used prior to
 397     // wx3) is inexact: it uses screen DC, which has much lower resolution and
 398     // has other properties different from printer DC, so the preview is not
 399     // quite right.
 400     //
 401     // To make matters worse, if the application depends heavily on
 402     // GetTextExtent() or does text layout itself, the output in preview and on
 403     // paper can be very different. In particular, wxHtmlEasyPrinting is
 404     // affected and the preview can be easily off by several pages.
 405     //
 406     // To fix this, we render the preview into high-resolution enhanced
 407     // metafile with properties identical to the printer DC. This guarantees
 408     // metrics correctness while still being fast.
 409
 410
 411     // print the preview into a metafile:
 412     wxPrinterDC printerDC(m_printDialogData.GetPrintData());
 413     wxEnhMetaFileDC metaDC(printerDC,
 414                            wxEmptyString,
 415                            printerDC.GetSize().x, printerDC.GetSize().y);
 416
 417     if ( !RenderPageIntoDC(metaDC, pageNum) )
 418         return false;
 419
 420     wxEnhMetaFile *metafile = metaDC.Close();
 421     if ( !metafile )
 422         return false;
 423
 424     // now render the metafile:
 425     wxMemoryDC bmpDC;
 426     bmpDC.SelectObject(bmp);
 427     bmpDC.Clear();
 428
 429     wxRect outRect(0, 0, bmp.GetWidth(), bmp.GetHeight());
 430     metafile->Play(&bmpDC, &outRect);
 431
 432
 433     delete metafile;
 434
 435     // TODO: we should keep the metafile and reuse it when changing zoom level
 436
 437     return true;
 438 }
 439
 440
 441 BOOL CALLBACK wxAbortProc(HDC WXUNUSED(hdc), int WXUNUSED(error))
 442 {
 443     MSG msg;
 444
 445     if (!wxPrinterBase::sm_abortWindow)              /* If the abort dialog isn't up yet */
 446         return(TRUE);
 447
 448     /* Process messages intended for the abort dialog box */
 449
 450     while (!wxPrinterBase::sm_abortIt && ::PeekMessage(&msg, 0, 0, 0, TRUE))
 451         if (!IsDialogMessage((HWND) wxPrinterBase::sm_abortWindow->GetHWND(), &msg)) {
 452             TranslateMessage(&msg);
 453             DispatchMessage(&msg);
 454         }
 455
 456     /* bAbort is TRUE (return is FALSE) if the user has aborted */
 457
 458     return !wxPrinterBase::sm_abortIt;
 459 }
 460
 461 #endif
 462     // wxUSE_PRINTING_ARCHITECTURE