samples/printing/printing.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        samples/printing.cpp
   3 // Purpose:     Printing demo for wxWidgets
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     1995
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx/wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16 #pragma hdrstop
  17 #endif
  18
  19 #ifndef WX_PRECOMP
  20 #include "wx/wx.h"
  21 #endif
  22
  23 #if !wxUSE_PRINTING_ARCHITECTURE
  24 #error "You must set wxUSE_PRINTING_ARCHITECTURE to 1 in setup.h, and recompile the library."
  25 #endif
  26
  27 // Set this to 1 if you want to test PostScript printing under MSW.
  28 // However, you'll also need to edit src/msw/makefile.nt.
  29 #define wxTEST_POSTSCRIPT_IN_MSW 0
  30
  31 #include <ctype.h>
  32 #include "wx/metafile.h"
  33 #include "wx/print.h"
  34 #include "wx/printdlg.h"
  35 #include "wx/image.h"
  36 #include "wx/accel.h"
  37
  38 #if wxTEST_POSTSCRIPT_IN_MSW
  39 #include "wx/generic/printps.h"
  40 #include "wx/generic/prntdlgg.h"
  41 #endif
  42
  43 #ifdef __WXMAC__
  44 #include "wx/mac/printdlg.h"
  45 #endif
  46
  47 #include "printing.h"
  48
  49 #ifndef __WXMSW__
  50 #include "mondrian.xpm"
  51 #endif
  52
  53 #if wxUSE_LIBGNOMEPRINT
  54 #include "wx/html/forcelnk.h"
  55 FORCE_LINK(gnome_print)
  56 #endif
  57
  58
  59 // Declare a frame
  60 MyFrame   *frame = (MyFrame *) NULL;
  61 // int orientation = wxPORTRAIT;
  62
  63 // Global print data, to remember settings during the session
  64 wxPrintData *g_printData = (wxPrintData*) NULL ;
  65
  66 // Global page setup data
  67 wxPageSetupDialogData* g_pageSetupData = (wxPageSetupDialogData*) NULL;
  68
  69 // Main proc
  70 IMPLEMENT_APP(MyApp)
  71
  72 // Writes a header on a page. Margin units are in millimetres.
  73 bool WritePageHeader(wxPrintout *printout, wxDC *dc, const wxChar *text, float mmToLogical);
  74
  75 // The `main program' equivalent, creating the windows and returning the
  76 // main frame
  77
  78 bool MyApp::OnInit(void)
  79 {
  80     if ( !wxApp::OnInit() )
  81         return false;
  82
  83     wxInitAllImageHandlers();
  84
  85     m_testFont.Create(10, wxSWISS, wxNORMAL, wxNORMAL);
  86
  87     g_printData = new wxPrintData;
  88     // You could set an initial paper size here
  89 //    g_printData->SetPaperId(wxPAPER_LETTER); // for Americans
  90 //    g_printData->SetPaperId(wxPAPER_A4);    // for everyone else
  91
  92     g_pageSetupData = new wxPageSetupDialogData;
  93     // copy over initial paper size from print record
  94     (*g_pageSetupData) = *g_printData;
  95     // Set some initial page margins in mm.
  96     g_pageSetupData->SetMarginTopLeft(wxPoint(15, 15));
  97     g_pageSetupData->SetMarginBottomRight(wxPoint(15, 15));
  98
  99     // Create the main frame window
 100     frame = new MyFrame((wxFrame *) NULL, _T("wxWidgets Printing Demo"),
 101         wxPoint(0, 0), wxSize(400, 400));
 102
 103 #if wxUSE_STATUSBAR
 104     // Give it a status line
 105     frame->CreateStatusBar(2);
 106 #endif // wxUSE_STATUSBAR
 107
 108     // Load icon and bitmap
 109     frame->SetIcon( wxICON( mondrian) );
 110
 111     // Make a menubar
 112     wxMenu *file_menu = new wxMenu;
 113
 114     file_menu->Append(WXPRINT_PRINT, _T("&Print..."),              _T("Print"));
 115     file_menu->Append(WXPRINT_PAGE_SETUP, _T("Page Set&up..."),              _T("Page setup"));
 116 #ifdef __WXMAC__
 117     file_menu->Append(WXPRINT_PAGE_MARGINS, _T("Page Margins..."), _T("Page margins"));
 118 #endif
 119     file_menu->Append(WXPRINT_PREVIEW, _T("Print Pre&view"),              _T("Preview"));
 120
 121 #if wxUSE_ACCEL
 122     // Accelerators
 123     wxAcceleratorEntry entries[1];
 124     entries[0].Set(wxACCEL_CTRL, (int) 'V', WXPRINT_PREVIEW);
 125     wxAcceleratorTable accel(1, entries);
 126     frame->SetAcceleratorTable(accel);
 127 #endif
 128
 129 #if defined(__WXMSW__) && wxTEST_POSTSCRIPT_IN_MSW
 130     file_menu->AppendSeparator();
 131     file_menu->Append(WXPRINT_PRINT_PS, _T("Print PostScript..."),              _T("Print (PostScript)"));
 132     file_menu->Append(WXPRINT_PAGE_SETUP_PS, _T("Page Setup PostScript..."),              _T("Page setup (PostScript)"));
 133     file_menu->Append(WXPRINT_PREVIEW_PS, _T("Print Preview PostScript"),              _T("Preview (PostScript)"));
 134 #endif
 135
 136     file_menu->AppendSeparator();
 137     file_menu->Append(WXPRINT_ANGLEUP, _T("Angle up\tAlt-U"),                _T("Raise rotated text angle"));
 138     file_menu->Append(WXPRINT_ANGLEDOWN, _T("Angle down\tAlt-D"),            _T("Lower rotated text angle"));
 139     file_menu->AppendSeparator();
 140     file_menu->Append(WXPRINT_QUIT, _T("E&xit"),                _T("Exit program"));
 141
 142     wxMenu *help_menu = new wxMenu;
 143     help_menu->Append(WXPRINT_ABOUT, _T("&About"),              _T("About this demo"));
 144
 145     wxMenuBar *menu_bar = new wxMenuBar;
 146
 147     menu_bar->Append(file_menu, _T("&File"));
 148     menu_bar->Append(help_menu, _T("&Help"));
 149
 150     // Associate the menu bar with the frame
 151     frame->SetMenuBar(menu_bar);
 152
 153     MyCanvas *canvas = new MyCanvas(frame, wxPoint(0, 0), wxSize(100, 100), wxRETAINED|wxHSCROLL|wxVSCROLL);
 154
 155     // Give it scrollbars: the virtual canvas is 20 * 50 = 1000 pixels in each direction
 156     canvas->SetScrollbars(20, 20, 50, 50);
 157
 158     frame->canvas = canvas;
 159
 160     frame->Centre(wxBOTH);
 161     frame->Show();
 162
 163 #if wxUSE_STATUSBAR
 164     frame->SetStatusText(_T("Printing demo"));
 165 #endif // wxUSE_STATUSBAR
 166
 167     SetTopWindow(frame);
 168
 169     return true;
 170 }
 171
 172 int MyApp::OnExit()
 173 {
 174     delete g_printData;
 175     delete g_pageSetupData;
 176     return 1;
 177 }
 178
 179 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 180 EVT_MENU(WXPRINT_QUIT, MyFrame::OnExit)
 181 EVT_MENU(WXPRINT_PRINT, MyFrame::OnPrint)
 182 EVT_MENU(WXPRINT_PREVIEW, MyFrame::OnPrintPreview)
 183 EVT_MENU(WXPRINT_PAGE_SETUP, MyFrame::OnPageSetup)
 184 EVT_MENU(WXPRINT_ABOUT, MyFrame::OnPrintAbout)
 185 #if defined(__WXMSW__) && wxTEST_POSTSCRIPT_IN_MSW
 186 EVT_MENU(WXPRINT_PRINT_PS, MyFrame::OnPrintPS)
 187 EVT_MENU(WXPRINT_PREVIEW_PS, MyFrame::OnPrintPreviewPS)
 188 EVT_MENU(WXPRINT_PAGE_SETUP_PS, MyFrame::OnPageSetupPS)
 189 #endif
 190 #ifdef __WXMAC__
 191 EVT_MENU(WXPRINT_PAGE_MARGINS, MyFrame::OnPageMargins)
 192 #endif
 193 EVT_MENU(WXPRINT_ANGLEUP, MyFrame::OnAngleUp)
 194 EVT_MENU(WXPRINT_ANGLEDOWN, MyFrame::OnAngleDown)
 195 END_EVENT_TABLE()
 196
 197 // Define my frame constructor
 198 MyFrame::MyFrame(wxFrame *frame, const wxString& title, const wxPoint& pos, const wxSize& size):
 199 wxFrame(frame, wxID_ANY, title, pos, size)
 200 {
 201     canvas = NULL;
 202     m_angle = 30;
 203 #if 0
 204     wxImage image( wxT("test.jpg") );
 205     image.SetAlpha();
 206     int i,j;
 207     for (i = 0; i < image.GetWidth(); i++)
 208        for (j = 0; j < image.GetHeight(); j++)
 209           image.SetAlpha( i, j, 50 );
 210     m_bitmap = image;
 211 #endif
 212 }
 213
 214 void MyFrame::OnExit(wxCommandEvent& WXUNUSED(event))
 215 {
 216     Close(true /*force closing*/);
 217 }
 218
 219 void MyFrame::OnPrint(wxCommandEvent& WXUNUSED(event))
 220 {
 221     wxPrintDialogData printDialogData(* g_printData);
 222
 223     wxPrinter printer(& printDialogData);
 224     MyPrintout printout(_T("My printout"));
 225     if (!printer.Print(this, &printout, true /*prompt*/))
 226     {
 227         if (wxPrinter::GetLastError() == wxPRINTER_ERROR)
 228             wxMessageBox(_T("There was a problem printing.\nPerhaps your current printer is not set correctly?"), _T("Printing"), wxOK);
 229         else
 230             wxMessageBox(_T("You canceled printing"), _T("Printing"), wxOK);
 231     }
 232     else
 233     {
 234         (*g_printData) = printer.GetPrintDialogData().GetPrintData();
 235     }
 236 }
 237
 238 void MyFrame::OnPrintPreview(wxCommandEvent& WXUNUSED(event))
 239 {
 240     // Pass two printout objects: for preview, and possible printing.
 241     wxPrintDialogData printDialogData(* g_printData);
 242     wxPrintPreview *preview = new wxPrintPreview(new MyPrintout, new MyPrintout, & printDialogData);
 243     if (!preview->Ok())
 244     {
 245         delete preview;
 246         wxMessageBox(_T("There was a problem previewing.\nPerhaps your current printer is not set correctly?"), _T("Previewing"), wxOK);
 247         return;
 248     }
 249
 250     wxPreviewFrame *frame = new wxPreviewFrame(preview, this, _T("Demo Print Preview"), wxPoint(100, 100), wxSize(600, 650));
 251     frame->Centre(wxBOTH);
 252     frame->Initialize();
 253     frame->Show();
 254 }
 255
 256 void MyFrame::OnPageSetup(wxCommandEvent& WXUNUSED(event))
 257 {
 258     (*g_pageSetupData) = *g_printData;
 259
 260     wxPageSetupDialog pageSetupDialog(this, g_pageSetupData);
 261     pageSetupDialog.ShowModal();
 262
 263     (*g_printData) = pageSetupDialog.GetPageSetupDialogData().GetPrintData();
 264     (*g_pageSetupData) = pageSetupDialog.GetPageSetupDialogData();
 265 }
 266
 267 #if defined(__WXMSW__) && wxTEST_POSTSCRIPT_IN_MSW
 268 void MyFrame::OnPrintPS(wxCommandEvent& WXUNUSED(event))
 269 {
 270     wxPostScriptPrinter printer(g_printData);
 271     MyPrintout printout(_T("My printout"));
 272     printer.Print(this, &printout, true/*prompt*/);
 273
 274     (*g_printData) = printer.GetPrintData();
 275 }
 276
 277 void MyFrame::OnPrintPreviewPS(wxCommandEvent& WXUNUSED(event))
 278 {
 279     // Pass two printout objects: for preview, and possible printing.
 280     wxPrintDialogData printDialogData(* g_printData);
 281     wxPrintPreview *preview = new wxPrintPreview(new MyPrintout, new MyPrintout, & printDialogData);
 282     wxPreviewFrame *frame = new wxPreviewFrame(preview, this, _T("Demo Print Preview"), wxPoint(100, 100), wxSize(600, 650));
 283     frame->Centre(wxBOTH);
 284     frame->Initialize();
 285     frame->Show();
 286 }
 287
 288 void MyFrame::OnPageSetupPS(wxCommandEvent& WXUNUSED(event))
 289 {
 290     (*g_pageSetupData) = * g_printData;
 291
 292     wxGenericPageSetupDialog pageSetupDialog(this, g_pageSetupData);
 293     pageSetupDialog.ShowModal();
 294
 295     (*g_printData) = pageSetupDialog.GetPageSetupDialogData().GetPrintData();
 296     (*g_pageSetupData) = pageSetupDialog.GetPageSetupDialogData();
 297 }
 298 #endif
 299
 300
 301 #ifdef __WXMAC__
 302 void MyFrame::OnPageMargins(wxCommandEvent& WXUNUSED(event))
 303 {
 304     (*g_pageSetupData) = *g_printData;
 305
 306     wxMacPageMarginsDialog pageMarginsDialog(this, g_pageSetupData);
 307     pageMarginsDialog.ShowModal();
 308
 309     (*g_printData) = pageMarginsDialog.GetPageSetupDialogData().GetPrintData();
 310     (*g_pageSetupData) = pageMarginsDialog.GetPageSetupDialogData();
 311 }
 312 #endif
 313
 314
 315 void MyFrame::OnPrintAbout(wxCommandEvent& WXUNUSED(event))
 316 {
 317     (void)wxMessageBox(_T("wxWidgets printing demo\nAuthor: Julian Smart"),
 318         _T("About wxWidgets printing demo"), wxOK|wxCENTRE);
 319 }
 320
 321 void MyFrame::OnAngleUp(wxCommandEvent& WXUNUSED(event))
 322 {
 323     m_angle += 5;
 324     canvas->Refresh();
 325 }
 326
 327 void MyFrame::OnAngleDown(wxCommandEvent& WXUNUSED(event))
 328 {
 329     m_angle -= 5;
 330     canvas->Refresh();
 331 }
 332
 333 void MyFrame::Draw(wxDC& dc)
 334 {
 335     // This routine just draws a bunch of random stuff on the screen so that we
 336     // can check that different types of object are being drawn consistently
 337     // between the screen image, the print preview image (at various zoom
 338     // levels), and the printed page.
 339     dc.SetBackground(*wxWHITE_BRUSH);
 340     dc.Clear();
 341     dc.SetFont(wxGetApp().m_testFont);
 342
 343     dc.SetBackgroundMode(wxTRANSPARENT);
 344
 345     dc.SetPen(*wxBLACK_PEN);
 346     dc.SetBrush(*wxLIGHT_GREY_BRUSH);
 347     dc.DrawRectangle(0, 0, 230, 350);
 348     dc.DrawLine(0, 0, 229, 349);
 349     dc.DrawLine(229, 0, 0, 349);
 350     dc.SetBrush(*wxTRANSPARENT_BRUSH);
 351
 352     dc.SetBrush(*wxCYAN_BRUSH);
 353     dc.SetPen(*wxRED_PEN);
 354
 355     dc.DrawRoundedRectangle(0, 20, 200, 80, 20);
 356
 357     dc.DrawText( wxT("Rectangle 200 by 80"), 40, 40);
 358
 359     dc.SetPen( wxPen(*wxBLACK,0,wxDOT_DASH) );
 360     dc.DrawEllipse(50, 140, 100, 50);
 361     dc.SetPen(*wxRED_PEN);
 362
 363     dc.DrawText( wxT("Test message: this is in 10 point text"), 10, 180);
 364
 365 #if wxUSE_UNICODE
 366     char *test = "Hebrew    שלום -- Japanese (日本語)";
 367     wxString tmp = wxConvUTF8.cMB2WC( test );
 368     dc.DrawText( tmp, 10, 200 );
 369 #endif
 370
 371     wxPoint points[5];
 372     points[0].x = 0;
 373     points[0].y = 0;
 374     points[1].x = 20;
 375     points[1].y = 0;
 376     points[2].x = 20;
 377     points[2].y = 20;
 378     points[3].x = 10;
 379     points[3].y = 20;
 380     points[4].x = 10;
 381     points[4].y = -20;
 382     dc.DrawPolygon( 5, points, 20, 250, wxODDEVEN_RULE );
 383     dc.DrawPolygon( 5, points, 50, 250, wxWINDING_RULE );
 384
 385     dc.DrawEllipticArc( 80, 250, 60, 30, 0.0, 270.0 );
 386
 387     points[0].x = 150;
 388     points[0].y = 250;
 389     points[1].x = 180;
 390     points[1].y = 250;
 391     points[2].x = 180;
 392     points[2].y = 220;
 393     points[3].x = 200;
 394     points[3].y = 220;
 395     dc.DrawSpline( 4, points );
 396
 397     dc.DrawArc( 20,10, 10,10, 25,40 );
 398
 399     wxString str;
 400     int i = 0;
 401     str.Printf( wxT("---- Text at angle %d ----"), i );
 402     dc.DrawRotatedText( str, 100, 300, i );
 403
 404     i = m_angle;
 405     str.Printf( wxT("---- Text at angle %d ----"), i );
 406     dc.DrawRotatedText( str, 100, 300, i );
 407
 408     wxIcon my_icon = wxICON(mondrian) ;
 409
 410     dc.DrawIcon( my_icon, 100, 100);
 411
 412     if (m_bitmap.Ok())
 413         dc.DrawBitmap( m_bitmap, 10, 10 );
 414 }
 415
 416 void MyFrame::OnSize(wxSizeEvent& event )
 417 {
 418     wxFrame::OnSize(event);
 419 }
 420
 421 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 422 EVT_MOUSE_EVENTS(MyCanvas::OnEvent)
 423 END_EVENT_TABLE()
 424
 425 MyCanvas::MyCanvas(wxFrame *frame, const wxPoint& pos, const wxSize& size, long style):
 426     wxScrolledWindow(frame, wxID_ANY, pos, size, style)
 427 {
 428     SetBackgroundColour(* wxWHITE);
 429 }
 430
 431 void MyCanvas::OnDraw(wxDC& dc)
 432 {
 433     frame->Draw(dc);
 434 }
 435
 436 void MyCanvas::OnEvent(wxMouseEvent& WXUNUSED(event))
 437 {
 438 }
 439
 440 bool MyPrintout::OnPrintPage(int page)
 441 {
 442     wxDC *dc = GetDC();
 443     if (dc)
 444     {
 445         if (page == 1)
 446             DrawPageOne();
 447         else if (page == 2)
 448             DrawPageTwo();
 449
 450         // Draw page numbers at top left corner of printable area, sized so that
 451         // screen size of text matches paper size.
 452         MapScreenSizeToPage();
 453         wxChar buf[200];
 454         wxSprintf(buf, wxT("PAGE %d"), page);
 455         dc->DrawText(buf, 0, 0);
 456
 457         return true;
 458     }
 459     else
 460         return false;
 461 }
 462
 463 bool MyPrintout::OnBeginDocument(int startPage, int endPage)
 464 {
 465     if (!wxPrintout::OnBeginDocument(startPage, endPage))
 466         return false;
 467
 468     return true;
 469 }
 470
 471 void MyPrintout::GetPageInfo(int *minPage, int *maxPage, int *selPageFrom, int *selPageTo)
 472 {
 473     *minPage = 1;
 474     *maxPage = 2;
 475     *selPageFrom = 1;
 476     *selPageTo = 2;
 477 }
 478
 479 bool MyPrintout::HasPage(int pageNum)
 480 {
 481     return (pageNum == 1 || pageNum == 2);
 482 }
 483
 484 void MyPrintout::DrawPageOne()
 485 {
 486     // You might use THIS code if you were scaling graphics of known size to fit
 487     // on the page. The commented-out code illustrates different ways of scaling
 488     // the graphics.
 489
 490     // We know the graphic is 230x350. If we didn't know this, we'd need to
 491     // calculate it.
 492     wxCoord maxX = 230;
 493     wxCoord maxY = 350;
 494
 495     // This sets the user scale and origin of the DC so that the image fits
 496     // within the paper rectangle (but the edges could be cut off by printers
 497     // that can't print to the edges of the paper -- which is most of them. Use
 498     // this if your image already has its own margins.
 499 //    FitThisSizeToPaper(wxSize(maxX, maxY));
 500 //    wxRect fitRect = GetLogicalPaperRect();
 501
 502     // This sets the user scale and origin of the DC so that the image fits
 503     // within the page rectangle, which is the printable area on Mac and MSW
 504     // and is the entire page on other platforms.
 505 //    FitThisSizeToPage(wxSize(maxX, maxY));
 506 //    wxRect fitRect = GetLogicalPageRect();
 507
 508     // This sets the user scale and origin of the DC so that the image fits
 509     // within the page margins as specified by g_PageSetupData, which you can
 510     // change (on some platforms, at least) in the Page Setup dialog. Note that
 511     // on Mac, the native Page Setup dialog doesn't let you change the margins
 512     // of a wxPageSetupDialogData object, so you'll have to write your own dialog or
 513     // use the Mac-only wxMacPageMarginsDialog, as we do in this program.
 514     FitThisSizeToPageMargins(wxSize(maxX, maxY), *g_pageSetupData);
 515     wxRect fitRect = GetLogicalPageMarginsRect(*g_pageSetupData);
 516
 517     // This sets the user scale and origin of the DC so that the image appears
 518     // on the paper at the same size that it appears on screen (i.e., 10-point
 519     // type on screen is 10-point on the printed page) and is positioned in the
 520     // top left corner of the page rectangle (just as the screen image appears
 521     // in the top left corner of the window).
 522 //    MapScreenSizeToPage();
 523 //    wxRect fitRect = GetLogicalPageRect();
 524
 525     // You could also map the screen image to the entire paper at the same size
 526     // as it appears on screen.
 527 //    MapScreenSizeToPaper();
 528 //    wxRect fitRect = GetLogicalPaperRect();
 529
 530     // You might also wish to do you own scaling in order to draw objects at
 531     // full native device resolution. In this case, you should do the following.
 532     // Note that you can use the GetLogicalXXXRect() commands to obtain the
 533     // appropriate rect to scale to.
 534 //    MapScreenSizeToDevice();
 535 //    wxRect fitRect = GetLogicalPageRect();
 536
 537     // Each of the preceding Fit or Map routines positions the origin so that
 538     // the drawn image is positioned at the top left corner of the reference
 539     // rectangle. You can easily center or right- or bottom-justify the image as
 540     // follows.
 541
 542     // This offsets the image so that it is centered within the reference
 543     // rectangle defined above.
 544     wxCoord xoff = (fitRect.width - maxX) / 2;
 545     wxCoord yoff = (fitRect.height - maxY) / 2;
 546     OffsetLogicalOrigin(xoff, yoff);
 547
 548     // This offsets the image so that it is positioned at the bottom right of
 549     // the reference rectangle defined above.
 550 //    wxCoord xoff = (fitRect.width - maxX);
 551 //    wxCoord yoff = (fitRect.height - maxY);
 552 //    OffsetLogicalOrigin(xoff, yoff);
 553
 554     frame->Draw(*GetDC());
 555 }
 556
 557 void MyPrintout::DrawPageTwo()
 558 {
 559     // You might use THIS code to set the printer DC to ROUGHLY reflect
 560     // the screen text size. This page also draws lines of actual length
 561     // 5cm on the page.
 562
 563     // Compare this to DrawPageOne(), which uses the really convenient routines
 564     // from wxPrintout to fit the screen image onto the printed page. This page
 565     // illustrates how to do all the scaling calculations yourself, if you're so
 566     // inclined.
 567
 568     wxDC *dc = GetDC();
 569
 570     // Get the logical pixels per inch of screen and printer
 571     int ppiScreenX, ppiScreenY;
 572     GetPPIScreen(&ppiScreenX, &ppiScreenY);
 573     int ppiPrinterX, ppiPrinterY;
 574     GetPPIPrinter(&ppiPrinterX, &ppiPrinterY);
 575
 576     // This scales the DC so that the printout roughly represents the the screen
 577     // scaling. The text point size _should_ be the right size but in fact is
 578     // too small for some reason. This is a detail that will need to be
 579     // addressed at some point but can be fudged for the moment.
 580     float scale = (float)((float)ppiPrinterX/(float)ppiScreenX);
 581
 582     // Now we have to check in case our real page size is reduced (e.g. because
 583     // we're drawing to a print preview memory DC)
 584     int pageWidth, pageHeight;
 585     int w, h;
 586     dc->GetSize(&w, &h);
 587     GetPageSizePixels(&pageWidth, &pageHeight);
 588
 589     // If printer pageWidth == current DC width, then this doesn't change. But w
 590     // might be the preview bitmap width, so scale down.
 591     float overallScale = scale * (float)(w/(float)pageWidth);
 592     dc->SetUserScale(overallScale, overallScale);
 593
 594     // Calculate conversion factor for converting millimetres into logical
 595     // units. There are approx. 25.4 mm to the inch. There are ppi device units
 596     // to the inch. Therefore 1 mm corresponds to ppi/25.4 device units. We also
 597     // divide by the screen-to-printer scaling factor, because we need to
 598     // unscale to pass logical units to DrawLine.
 599
 600     // Draw 50 mm by 50 mm L shape
 601     float logUnitsFactor = (float)(ppiPrinterX/(scale*25.4));
 602     float logUnits = (float)(50*logUnitsFactor);
 603     dc->SetPen(* wxBLACK_PEN);
 604     dc->DrawLine(50, 250, (long)(50.0 + logUnits), 250);
 605     dc->DrawLine(50, 250, 50, (long)(250.0 + logUnits));
 606
 607     dc->SetBackgroundMode(wxTRANSPARENT);
 608     dc->SetBrush(*wxTRANSPARENT_BRUSH);
 609
 610     { // GetTextExtent demo:
 611         wxString words[7] = {_T("This "), _T("is "), _T("GetTextExtent "), _T("testing "), _T("string. "), _T("Enjoy "), _T("it!")};
 612         long w, h;
 613         long x = 200, y= 250;
 614         wxFont fnt(15, wxSWISS, wxNORMAL, wxNORMAL);
 615
 616         dc->SetFont(fnt);
 617
 618         for (int i = 0; i < 7; i++)
 619         {
 620             wxString word = words[i];
 621             word.Remove( word.Len()-1, 1 );
 622             dc->GetTextExtent(word, &w, &h);
 623             dc->DrawRectangle(x, y, w, h);
 624             dc->GetTextExtent(words[i], &w, &h);
 625             dc->DrawText(words[i], x, y);
 626             x += w;
 627         }
 628
 629     }
 630
 631     dc->SetFont(wxGetApp().m_testFont);
 632
 633     dc->DrawText(_T("Some test text"), 200, 300 );
 634
 635     // TESTING
 636
 637     int leftMargin = 20;
 638     int rightMargin = 20;
 639     int topMargin = 20;
 640     int bottomMargin = 20;
 641
 642     int pageWidthMM, pageHeightMM;
 643     GetPageSizeMM(&pageWidthMM, &pageHeightMM);
 644
 645     float leftMarginLogical = (float)(logUnitsFactor*leftMargin);
 646     float topMarginLogical = (float)(logUnitsFactor*topMargin);
 647     float bottomMarginLogical = (float)(logUnitsFactor*(pageHeightMM - bottomMargin));
 648     float rightMarginLogical = (float)(logUnitsFactor*(pageWidthMM - rightMargin));
 649
 650     dc->SetPen(* wxRED_PEN);
 651     dc->DrawLine( (long)leftMarginLogical, (long)topMarginLogical,
 652         (long)rightMarginLogical, (long)topMarginLogical);
 653     dc->DrawLine( (long)leftMarginLogical, (long)bottomMarginLogical,
 654         (long)rightMarginLogical,  (long)bottomMarginLogical);
 655
 656     WritePageHeader(this, dc, _T("A header"), logUnitsFactor);
 657 }
 658
 659 // Writes a header on a page. Margin units are in millimetres.
 660 bool WritePageHeader(wxPrintout *printout, wxDC *dc, const wxChar *text, float mmToLogical)
 661 {
 662 /*
 663 static wxFont *headerFont = (wxFont *) NULL;
 664 if (!headerFont)
 665 {
 666 headerFont = wxTheFontList->FindOrCreateFont(16, wxSWISS, wxNORMAL, wxBOLD);
 667 }
 668 dc->SetFont(headerFont);
 669     */
 670
 671     int pageWidthMM, pageHeightMM;
 672
 673     printout->GetPageSizeMM(&pageWidthMM, &pageHeightMM);
 674     wxUnusedVar(pageHeightMM);
 675
 676     int leftMargin = 10;
 677     int topMargin = 10;
 678     int rightMargin = 10;
 679
 680     float leftMarginLogical = (float)(mmToLogical*leftMargin);
 681     float topMarginLogical = (float)(mmToLogical*topMargin);
 682     float rightMarginLogical = (float)(mmToLogical*(pageWidthMM - rightMargin));
 683
 684     long xExtent, yExtent;
 685     dc->GetTextExtent(text, &xExtent, &yExtent);
 686     float xPos = (float)(((((pageWidthMM - leftMargin - rightMargin)/2.0)+leftMargin)*mmToLogical) - (xExtent/2.0));
 687     dc->DrawText(text, (long)xPos, (long)topMarginLogical);
 688
 689     dc->SetPen(* wxBLACK_PEN);
 690     dc->DrawLine( (long)leftMarginLogical, (long)(topMarginLogical+yExtent),
 691         (long)rightMarginLogical, (long)topMarginLogical+yExtent );
 692
 693     return true;
 694 }