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