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         wxDELETE(sm_abortWindow);
 247     }
 248
 249     delete dc;
 250
 251     return sm_lastError == wxPRINTER_NO_ERROR;
 252 }
 253
 254 wxDC *wxWindowsPrinter::PrintDialog(wxWindow *parent)
 255 {
 256     wxDC *dc = NULL;
 257
 258     wxWindowsPrintDialog dialog(parent, & m_printDialogData);
 259     int ret = dialog.ShowModal();
 260
 261     if (ret == wxID_OK)
 262     {
 263         dc = dialog.GetPrintDC();
 264         m_printDialogData = dialog.GetPrintDialogData();
 265         if (dc == NULL)
 266             sm_lastError = wxPRINTER_ERROR;
 267         else
 268             sm_lastError = wxPRINTER_NO_ERROR;
 269     }
 270     else
 271         sm_lastError = wxPRINTER_CANCELLED;
 272
 273     return dc;
 274 }
 275
 276 bool wxWindowsPrinter::Setup(wxWindow *WXUNUSED(parent))
 277 {
 278 #if 0
 279     // We no longer expose that dialog
 280     wxPrintDialog dialog(parent, & m_printDialogData);
 281     dialog.GetPrintDialogData().SetSetupDialog(true);
 282
 283     int ret = dialog.ShowModal();
 284
 285     if (ret == wxID_OK)
 286     {
 287         m_printDialogData = dialog.GetPrintDialogData();
 288     }
 289
 290     return (ret == wxID_OK);
 291 #else
 292     return false;
 293 #endif
 294 }
 295
 296 /*
 297 * Print preview
 298 */
 299
 300 wxWindowsPrintPreview::wxWindowsPrintPreview(wxPrintout *printout,
 301                                              wxPrintout *printoutForPrinting,
 302                                              wxPrintDialogData *data)
 303                      : wxPrintPreviewBase(printout, printoutForPrinting, data)
 304 {
 305     DetermineScaling();
 306 }
 307
 308 wxWindowsPrintPreview::wxWindowsPrintPreview(wxPrintout *printout,
 309                                              wxPrintout *printoutForPrinting,
 310                                              wxPrintData *data)
 311                      : wxPrintPreviewBase(printout, printoutForPrinting, data)
 312 {
 313     DetermineScaling();
 314 }
 315
 316 wxWindowsPrintPreview::~wxWindowsPrintPreview()
 317 {
 318 }
 319
 320 bool wxWindowsPrintPreview::Print(bool interactive)
 321 {
 322     if (!m_printPrintout)
 323         return false;
 324     wxWindowsPrinter printer(&m_printDialogData);
 325     return printer.Print(m_previewFrame, m_printPrintout, interactive);
 326 }
 327
 328 void wxWindowsPrintPreview::DetermineScaling()
 329 {
 330     ScreenHDC dc;
 331     int logPPIScreenX = ::GetDeviceCaps(dc, LOGPIXELSX);
 332     int logPPIScreenY = ::GetDeviceCaps(dc, LOGPIXELSY);
 333     m_previewPrintout->SetPPIScreen(logPPIScreenX, logPPIScreenY);
 334
 335     // Get a device context for the currently selected printer
 336     wxPrinterDC printerDC(m_printDialogData.GetPrintData());
 337
 338     int printerWidthMM;
 339     int printerHeightMM;
 340     int printerXRes;
 341     int printerYRes;
 342     int logPPIPrinterX;
 343     int logPPIPrinterY;
 344
 345     wxRect paperRect;
 346
 347     if ( printerDC.IsOk() )
 348     {
 349         wxPrinterDCImpl *impl = (wxPrinterDCImpl*) printerDC.GetImpl();
 350         HDC dc = GetHdcOf(*impl);
 351         printerWidthMM = ::GetDeviceCaps(dc, HORZSIZE);
 352         printerHeightMM = ::GetDeviceCaps(dc, VERTSIZE);
 353         printerXRes = ::GetDeviceCaps(dc, HORZRES);
 354         printerYRes = ::GetDeviceCaps(dc, VERTRES);
 355         logPPIPrinterX = ::GetDeviceCaps(dc, LOGPIXELSX);
 356         logPPIPrinterY = ::GetDeviceCaps(dc, LOGPIXELSY);
 357
 358         paperRect = printerDC.GetPaperRect();
 359
 360         if ( logPPIPrinterX == 0 ||
 361                 logPPIPrinterY == 0 ||
 362                     printerWidthMM == 0 ||
 363                         printerHeightMM == 0 )
 364         {
 365             m_isOk = false;
 366         }
 367     }
 368     else
 369     {
 370         // use some defaults
 371         printerWidthMM = 150;
 372         printerHeightMM = 250;
 373         printerXRes = 1500;
 374         printerYRes = 2500;
 375         logPPIPrinterX = 600;
 376         logPPIPrinterY = 600;
 377
 378         paperRect = wxRect(0, 0, printerXRes, printerYRes);
 379         m_isOk = false;
 380     }
 381     m_pageWidth = printerXRes;
 382     m_pageHeight = printerYRes;
 383     m_previewPrintout->SetPageSizePixels(printerXRes, printerYRes);
 384     m_previewPrintout->SetPageSizeMM(printerWidthMM, printerHeightMM);
 385     m_previewPrintout->SetPaperRectPixels(paperRect);
 386     m_previewPrintout->SetPPIPrinter(logPPIPrinterX, logPPIPrinterY);
 387
 388     // At 100%, the page should look about page-size on the screen.
 389     m_previewScaleX = float(logPPIScreenX) / logPPIPrinterX;
 390     m_previewScaleY = float(logPPIScreenY) / logPPIPrinterY;
 391 }
 392
 393 bool wxWindowsPrintPreview::RenderPageIntoBitmap(wxBitmap& bmp, int pageNum)
 394 {
 395     // The preview, as implemented in wxPrintPreviewBase (and as used prior to
 396     // wx3) is inexact: it uses screen DC, which has much lower resolution and
 397     // has other properties different from printer DC, so the preview is not
 398     // quite right.
 399     //
 400     // To make matters worse, if the application depends heavily on
 401     // GetTextExtent() or does text layout itself, the output in preview and on
 402     // paper can be very different. In particular, wxHtmlEasyPrinting is
 403     // affected and the preview can be easily off by several pages.
 404     //
 405     // To fix this, we render the preview into high-resolution enhanced
 406     // metafile with properties identical to the printer DC. This guarantees
 407     // metrics correctness while still being fast.
 408
 409
 410     // print the preview into a metafile:
 411     wxPrinterDC printerDC(m_printDialogData.GetPrintData());
 412     wxEnhMetaFileDC metaDC(printerDC,
 413                            wxEmptyString,
 414                            printerDC.GetSize().x, printerDC.GetSize().y);
 415
 416     if ( !RenderPageIntoDC(metaDC, pageNum) )
 417         return false;
 418
 419     wxEnhMetaFile *metafile = metaDC.Close();
 420     if ( !metafile )
 421         return false;
 422
 423     // now render the metafile:
 424     wxMemoryDC bmpDC;
 425     bmpDC.SelectObject(bmp);
 426     bmpDC.Clear();
 427
 428     wxRect outRect(0, 0, bmp.GetWidth(), bmp.GetHeight());
 429     metafile->Play(&bmpDC, &outRect);
 430
 431
 432     delete metafile;
 433
 434     // TODO: we should keep the metafile and reuse it when changing zoom level
 435
 436     return true;
 437 }
 438
 439
 440 BOOL CALLBACK wxAbortProc(HDC WXUNUSED(hdc), int WXUNUSED(error))
 441 {
 442     MSG msg;
 443
 444     if (!wxPrinterBase::sm_abortWindow)              /* If the abort dialog isn't up yet */
 445         return(TRUE);
 446
 447     /* Process messages intended for the abort dialog box */
 448
 449     while (!wxPrinterBase::sm_abortIt && ::PeekMessage(&msg, 0, 0, 0, TRUE))
 450         if (!IsDialogMessage((HWND) wxPrinterBase::sm_abortWindow->GetHWND(), &msg)) {
 451             TranslateMessage(&msg);
 452             DispatchMessage(&msg);
 453         }
 454
 455     /* bAbort is TRUE (return is FALSE) if the user has aborted */
 456
 457     return !wxPrinterBase::sm_abortIt;
 458 }
 459
 460 #endif
 461     // wxUSE_PRINTING_ARCHITECTURE