samples/printing/printing.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        samples/printing.cpp
   3 // Purpose:     Printing demo for wxWidgets
   4 // Author:      Julian Smart
   5 // Modified by: Francesco Montorsi
   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     #include "wx/log.h"
  22 #endif
  23
  24 #if !wxUSE_PRINTING_ARCHITECTURE
  25     #error "You must set wxUSE_PRINTING_ARCHITECTURE to 1 in setup.h, and recompile the library."
  26 #endif
  27
  28 // Set this to 1 if you want to test PostScript printing under MSW.
  29 // However, you'll also need to edit src/msw/makefile.nt.
  30 #define wxTEST_POSTSCRIPT_IN_MSW 0
  31
  32 #include <ctype.h>
  33 #include "wx/metafile.h"
  34 #include "wx/print.h"
  35 #include "wx/printdlg.h"
  36 #include "wx/image.h"
  37 #include "wx/accel.h"
  38
  39 #if wxTEST_POSTSCRIPT_IN_MSW
  40     #include "wx/generic/printps.h"
  41     #include "wx/generic/prntdlgg.h"
  42 #endif
  43
  44 #if wxUSE_GRAPHICS_CONTEXT
  45     #include "wx/graphics.h"
  46 #endif
  47
  48 #ifdef __WXMAC__
  49     #include "wx/osx/printdlg.h"
  50 #endif
  51
  52 #include "printing.h"
  53
  54 #ifndef __WXMSW__
  55     #include "mondrian.xpm"
  56 #endif
  57
  58 // Global print data, to remember settings during the session
  59 wxPrintData *g_printData = NULL;
  60
  61 // Global page setup data
  62 wxPageSetupDialogData* g_pageSetupData = NULL;
  63
  64
  65
  66 // ----------------------------------------------------------------------------
  67 // MyApp
  68 // ----------------------------------------------------------------------------
  69
  70 IMPLEMENT_APP(MyApp)
  71
  72 bool MyApp::OnInit(void)
  73 {
  74     if ( !wxApp::OnInit() )
  75         return false;
  76
  77     wxInitAllImageHandlers();
  78
  79
  80     // init global objects
  81     // -------------------
  82
  83     g_printData = new wxPrintData;
  84
  85     // You could set an initial paper size here
  86 #if 0
  87     g_printData->SetPaperId(wxPAPER_LETTER); // for Americans
  88     g_printData->SetPaperId(wxPAPER_A4);    // for everyone else
  89 #endif
  90
  91     g_pageSetupData = new wxPageSetupDialogData;
  92
  93     // copy over initial paper size from print record
  94     (*g_pageSetupData) = *g_printData;
  95
  96     // Set some initial page margins in mm.
  97     g_pageSetupData->SetMarginTopLeft(wxPoint(15, 15));
  98     g_pageSetupData->SetMarginBottomRight(wxPoint(15, 15));
  99
 100
 101     // init local GUI objects
 102     // ----------------------
 103
 104 #if 0
 105     wxImage image( wxT("test.jpg") );
 106     image.SetAlpha();
 107     int i,j;
 108     for (i = 0; i < image.GetWidth(); i++)
 109        for (j = 0; j < image.GetHeight(); j++)
 110           image.SetAlpha( i, j, 50 );
 111     m_bitmap = image;
 112 #endif
 113     m_angle = 30;
 114     m_testFont.Create(10, wxFONTFAMILY_SWISS, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL);
 115
 116
 117     // Create the main frame window
 118     // ----------------------------
 119
 120     MyFrame* frame = new MyFrame((wxFrame *) NULL, wxT("wxWidgets Printing Demo"),
 121                                  wxPoint(0, 0), wxSize(400, 400));
 122
 123     frame->Centre(wxBOTH);
 124     frame->Show();
 125
 126     SetTopWindow(frame);
 127
 128     return true;
 129 }
 130
 131 int MyApp::OnExit()
 132 {
 133     delete g_printData;
 134     delete g_pageSetupData;
 135
 136     return wxApp::OnExit();
 137 }
 138
 139 void MyApp::Draw(wxDC&dc)
 140 {
 141     // This routine just draws a bunch of random stuff on the screen so that we
 142     // can check that different types of object are being drawn consistently
 143     // between the screen image, the print preview image (at various zoom
 144     // levels), and the printed page.
 145     dc.SetBackground(*wxWHITE_BRUSH);
 146     // dc.Clear();
 147     dc.SetFont(m_testFont);
 148
 149     // dc.SetBackgroundMode(wxTRANSPARENT);
 150
 151     dc.SetPen(*wxBLACK_PEN);
 152     dc.SetBrush(*wxLIGHT_GREY_BRUSH);
 153
 154     dc.DrawRectangle(0, 0, 230, 350);
 155     dc.DrawLine(0, 0, 229, 349);
 156     dc.DrawLine(229, 0, 0, 349);
 157     dc.SetBrush(*wxTRANSPARENT_BRUSH);
 158
 159     dc.SetBrush(*wxCYAN_BRUSH);
 160     dc.SetPen(*wxRED_PEN);
 161
 162     dc.DrawRoundedRectangle(0, 20, 200, 80, 20);
 163
 164     dc.DrawText( wxT("Rectangle 200 by 80"), 40, 40);
 165
 166     dc.SetPen( wxPen(*wxBLACK,0,wxDOT_DASH) );
 167     dc.DrawEllipse(50, 140, 100, 50);
 168     dc.SetPen(*wxRED_PEN);
 169
 170     dc.DrawText( wxT("Test message: this is in 10 point text"), 10, 180);
 171
 172 #if wxUSE_UNICODE
 173     const char *test = "Hebrew    שלום -- Japanese (日本語)";
 174     wxString tmp = wxConvUTF8.cMB2WC( test );
 175     dc.DrawText( tmp, 10, 200 );
 176 #endif
 177
 178     wxPoint points[5];
 179     points[0].x = 0;
 180     points[0].y = 0;
 181     points[1].x = 20;
 182     points[1].y = 0;
 183     points[2].x = 20;
 184     points[2].y = 20;
 185     points[3].x = 10;
 186     points[3].y = 20;
 187     points[4].x = 10;
 188     points[4].y = -20;
 189     dc.DrawPolygon( 5, points, 20, 250, wxODDEVEN_RULE );
 190     dc.DrawPolygon( 5, points, 50, 250, wxWINDING_RULE );
 191
 192     dc.DrawEllipticArc( 80, 250, 60, 30, 0.0, 270.0 );
 193
 194     points[0].x = 150;
 195     points[0].y = 250;
 196     points[1].x = 180;
 197     points[1].y = 250;
 198     points[2].x = 180;
 199     points[2].y = 220;
 200     points[3].x = 200;
 201     points[3].y = 220;
 202     dc.DrawSpline( 4, points );
 203
 204     dc.DrawArc( 20,10, 10,10, 25,40 );
 205
 206     wxString str;
 207     int i = 0;
 208     str.Printf( wxT("---- Text at angle %d ----"), i );
 209     dc.DrawRotatedText( str, 100, 300, i );
 210
 211     i = m_angle;
 212     str.Printf( wxT("---- Text at angle %d ----"), i );
 213     dc.DrawRotatedText( str, 100, 300, i );
 214
 215     wxIcon my_icon = wxICON(mondrian);
 216
 217     dc.DrawIcon( my_icon, 100, 100);
 218
 219     if (m_bitmap.IsOk())
 220         dc.DrawBitmap( m_bitmap, 10, 10 );
 221
 222 #if wxUSE_GRAPHICS_CONTEXT
 223     wxGraphicsContext *gc = NULL;
 224
 225     wxPrinterDC *printer_dc = wxDynamicCast( &dc, wxPrinterDC );
 226     if (printer_dc)
 227         gc = wxGraphicsContext::Create( *printer_dc );
 228
 229     wxWindowDC *window_dc = wxDynamicCast( &dc, wxWindowDC );
 230     if (window_dc)
 231         gc = wxGraphicsContext::Create( *window_dc );
 232
 233     if (gc)
 234     {
 235         // make a path that contains a circle and some lines, centered at 100,100
 236         gc->SetPen( *wxRED_PEN );
 237
 238         wxGraphicsPath path = gc->CreatePath();
 239         path.AddCircle( 50.0, 50.0, 50.0 );
 240         path.MoveToPoint(0.0, 50.0);
 241         path.AddLineToPoint(100.0, 50.0);
 242         path.MoveToPoint(50.0, 0.0);
 243         path.AddLineToPoint(50.0, 100.0 );
 244         path.CloseSubpath();
 245         path.AddRectangle(25.0, 25.0, 50.0, 50.0);
 246
 247         gc->StrokePath(path);
 248
 249         // draw some text
 250         wxString text("This text is drawn by wxGraphicsContext");
 251         gc->SetFont( m_testFont, *wxBLUE );
 252         gc->DrawText(text, 50.0, 50.0);
 253
 254         // draw rectangle around the text
 255         double w, h, d, el;
 256         gc->GetTextExtent(text, &w, &h, &d, &el);
 257         gc->SetPen( *wxBLUE_PEN );
 258         gc->DrawRectangle(50.0, 50.0, w, h);
 259
 260         delete gc;
 261     }
 262 #endif
 263 }
 264
 265
 266 // ----------------------------------------------------------------------------
 267 // MyFrame
 268 // ----------------------------------------------------------------------------
 269
 270 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 271     EVT_MENU(wxID_EXIT, MyFrame::OnExit)
 272     EVT_MENU(wxID_PRINT, MyFrame::OnPrint)
 273     EVT_MENU(wxID_PREVIEW, MyFrame::OnPrintPreview)
 274     EVT_MENU(WXPRINT_PAGE_SETUP, MyFrame::OnPageSetup)
 275     EVT_MENU(wxID_ABOUT, MyFrame::OnPrintAbout)
 276 #if defined(__WXMSW__) &&wxTEST_POSTSCRIPT_IN_MSW
 277     EVT_MENU(WXPRINT_PRINT_PS, MyFrame::OnPrintPS)
 278     EVT_MENU(WXPRINT_PREVIEW_PS, MyFrame::OnPrintPreviewPS)
 279     EVT_MENU(WXPRINT_PAGE_SETUP_PS, MyFrame::OnPageSetupPS)
 280 #endif
 281 #ifdef __WXMAC__
 282     EVT_MENU(WXPRINT_PAGE_MARGINS, MyFrame::OnPageMargins)
 283 #endif
 284     EVT_MENU(WXPRINT_ANGLEUP, MyFrame::OnAngleUp)
 285     EVT_MENU(WXPRINT_ANGLEDOWN, MyFrame::OnAngleDown)
 286 END_EVENT_TABLE()
 287
 288 MyFrame::MyFrame(wxFrame *frame, const wxString&title, const wxPoint&pos, const wxSize&size)
 289         : wxFrame(frame, wxID_ANY, title, pos, size)
 290 {
 291     m_canvas = NULL;
 292
 293 #if wxUSE_STATUSBAR
 294     // Give us a status line
 295     CreateStatusBar(2);
 296     SetStatusText(wxT("Printing demo"));
 297 #endif // wxUSE_STATUSBAR
 298
 299     // Load icon and bitmap
 300     SetIcon( wxICON( mondrian) );
 301
 302     // Make a menubar
 303     wxMenu *file_menu = new wxMenu;
 304
 305     file_menu->Append(wxID_PRINT, wxT("&Print..."),                 wxT("Print"));
 306     file_menu->Append(WXPRINT_PAGE_SETUP, wxT("Page Set&up..."),    wxT("Page setup"));
 307 #ifdef __WXMAC__
 308     file_menu->Append(WXPRINT_PAGE_MARGINS, wxT("Page Margins..."), wxT("Page margins"));
 309 #endif
 310     file_menu->Append(wxID_PREVIEW, wxT("Print Pre&view"),          wxT("Preview"));
 311
 312 #if wxUSE_ACCEL
 313     // Accelerators
 314     wxAcceleratorEntry entries[1];
 315     entries[0].Set(wxACCEL_CTRL, (int) 'V', wxID_PREVIEW);
 316     wxAcceleratorTable accel(1, entries);
 317     SetAcceleratorTable(accel);
 318 #endif
 319
 320 #if defined(__WXMSW__) &&wxTEST_POSTSCRIPT_IN_MSW
 321     file_menu->AppendSeparator();
 322     file_menu->Append(WXPRINT_PRINT_PS, wxT("Print PostScript..."),           wxT("Print (PostScript)"));
 323     file_menu->Append(WXPRINT_PAGE_SETUP_PS, wxT("Page Setup PostScript..."), wxT("Page setup (PostScript)"));
 324     file_menu->Append(WXPRINT_PREVIEW_PS, wxT("Print Preview PostScript"),    wxT("Preview (PostScript)"));
 325 #endif
 326
 327     file_menu->AppendSeparator();
 328     file_menu->Append(WXPRINT_ANGLEUP, wxT("Angle up\tAlt-U"),                wxT("Raise rotated text angle"));
 329     file_menu->Append(WXPRINT_ANGLEDOWN, wxT("Angle down\tAlt-D"),            wxT("Lower rotated text angle"));
 330     file_menu->AppendSeparator();
 331     file_menu->Append(wxID_EXIT, wxT("E&xit"),                                wxT("Exit program"));
 332
 333     wxMenu *help_menu = new wxMenu;
 334     help_menu->Append(wxID_ABOUT, wxT("&About"),                              wxT("About this demo"));
 335
 336     wxMenuBar *menu_bar = new wxMenuBar;
 337
 338     menu_bar->Append(file_menu, wxT("&File"));
 339     menu_bar->Append(help_menu, wxT("&Help"));
 340
 341     // Associate the menu bar with the frame
 342     SetMenuBar(menu_bar);
 343
 344
 345     // create the canvas
 346     // -----------------
 347
 348     m_canvas = new MyCanvas(this, wxPoint(0, 0), wxSize(100, 100),
 349                             wxRETAINED|wxHSCROLL|wxVSCROLL);
 350
 351     // Give it scrollbars: the virtual canvas is 20 * 50 = 1000 pixels in each direction
 352     m_canvas->SetScrollbars(20, 20, 50, 50);
 353 }
 354
 355 void MyFrame::OnExit(wxCommandEvent& WXUNUSED(event))
 356 {
 357     Close(true /*force closing*/);
 358 }
 359
 360 void MyFrame::OnPrint(wxCommandEvent& WXUNUSED(event))
 361 {
 362     wxPrintDialogData printDialogData(* g_printData);
 363
 364     wxPrinter printer(&printDialogData);
 365     MyPrintout printout(this, wxT("My printout"));
 366     if (!printer.Print(this, &printout, true /*prompt*/))
 367     {
 368         if (wxPrinter::GetLastError() == wxPRINTER_ERROR)
 369         {
 370             wxLogError(wxT("There was a problem printing. Perhaps your current printer is not set correctly?"));
 371         }
 372         else
 373         {
 374             wxLogMessage(wxT("You canceled printing"));
 375         }
 376     }
 377     else
 378     {
 379         (*g_printData) = printer.GetPrintDialogData().GetPrintData();
 380     }
 381 }
 382
 383 void MyFrame::OnPrintPreview(wxCommandEvent& WXUNUSED(event))
 384 {
 385     // Pass two printout objects: for preview, and possible printing.
 386     wxPrintDialogData printDialogData(* g_printData);
 387     wxPrintPreview *preview =
 388         new wxPrintPreview(new MyPrintout(this), new MyPrintout(this), &printDialogData);
 389     if (!preview->IsOk())
 390     {
 391         delete preview;
 392         wxLogError(wxT("There was a problem previewing.\nPerhaps your current printer is not set correctly?"));
 393         return;
 394     }
 395
 396     wxPreviewFrame *frame =
 397         new wxPreviewFrame(preview, this, wxT("Demo Print Preview"), wxPoint(100, 100), wxSize(600, 650));
 398     frame->Centre(wxBOTH);
 399     frame->Initialize();
 400     frame->Show();
 401 }
 402
 403 void MyFrame::OnPageSetup(wxCommandEvent& WXUNUSED(event))
 404 {
 405     (*g_pageSetupData) = *g_printData;
 406
 407     wxPageSetupDialog pageSetupDialog(this, g_pageSetupData);
 408     pageSetupDialog.ShowModal();
 409
 410     (*g_printData) = pageSetupDialog.GetPageSetupDialogData().GetPrintData();
 411     (*g_pageSetupData) = pageSetupDialog.GetPageSetupDialogData();
 412 }
 413
 414 #if defined(__WXMSW__) && wxTEST_POSTSCRIPT_IN_MSW
 415 void MyFrame::OnPrintPS(wxCommandEvent& WXUNUSED(event))
 416 {
 417     wxPostScriptPrinter printer(g_printData);
 418     MyPrintout printout(wxT("My printout"));
 419     printer.Print(this, &printout, true/*prompt*/);
 420
 421     (*g_printData) = printer.GetPrintData();
 422 }
 423
 424 void MyFrame::OnPrintPreviewPS(wxCommandEvent& WXUNUSED(event))
 425 {
 426     // Pass two printout objects: for preview, and possible printing.
 427     wxPrintDialogData printDialogData(* g_printData);
 428     wxPrintPreview *preview = new wxPrintPreview(new MyPrintout, new MyPrintout, &printDialogData);
 429     wxPreviewFrame *frame =
 430         new wxPreviewFrame(preview, this, wxT("Demo Print Preview"), wxPoint(100, 100), wxSize(600, 650));
 431     frame->Centre(wxBOTH);
 432     frame->Initialize();
 433     frame->Show();
 434 }
 435
 436 void MyFrame::OnPageSetupPS(wxCommandEvent& WXUNUSED(event))
 437 {
 438     (*g_pageSetupData) = * g_printData;
 439
 440     wxGenericPageSetupDialog pageSetupDialog(this, g_pageSetupData);
 441     pageSetupDialog.ShowModal();
 442
 443     (*g_printData) = pageSetupDialog.GetPageSetupDialogData().GetPrintData();
 444     (*g_pageSetupData) = pageSetupDialog.GetPageSetupDialogData();
 445 }
 446 #endif
 447
 448 #ifdef __WXMAC__
 449 void MyFrame::OnPageMargins(wxCommandEvent& WXUNUSED(event))
 450 {
 451     (*g_pageSetupData) = *g_printData;
 452
 453     wxMacPageMarginsDialog pageMarginsDialog(this, g_pageSetupData);
 454     pageMarginsDialog.ShowModal();
 455
 456     (*g_printData) = pageMarginsDialog.GetPageSetupDialogData().GetPrintData();
 457     (*g_pageSetupData) = pageMarginsDialog.GetPageSetupDialogData();
 458 }
 459 #endif
 460
 461 void MyFrame::OnPrintAbout(wxCommandEvent& WXUNUSED(event))
 462 {
 463     (void)wxMessageBox(wxT("wxWidgets printing demo\nAuthor: Julian Smart"),
 464                        wxT("About wxWidgets printing demo"), wxOK|wxCENTRE);
 465 }
 466
 467 void MyFrame::OnAngleUp(wxCommandEvent& WXUNUSED(event))
 468 {
 469     wxGetApp().IncrementAngle();
 470     m_canvas->Refresh();
 471 }
 472
 473 void MyFrame::OnAngleDown(wxCommandEvent& WXUNUSED(event))
 474 {
 475     wxGetApp().DecrementAngle();
 476     m_canvas->Refresh();
 477 }
 478
 479
 480 // ----------------------------------------------------------------------------
 481 // MyCanvas
 482 // ----------------------------------------------------------------------------
 483
 484 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 485   //  EVT_PAINT(MyCanvas::OnPaint)
 486 END_EVENT_TABLE()
 487
 488 MyCanvas::MyCanvas(wxFrame *frame, const wxPoint&pos, const wxSize&size, long style)
 489     : wxScrolledWindow(frame, wxID_ANY, pos, size, style)
 490 {
 491     SetBackgroundColour(*wxWHITE);
 492 }
 493
 494 //void MyCanvas::OnPaint(wxPaintEvent& WXUNUSED(evt))
 495 void MyCanvas::OnDraw(wxDC& dc)
 496 {
 497     //wxPaintDC dc(this);
 498     wxGetApp().Draw(dc);
 499 }
 500
 501
 502 // ----------------------------------------------------------------------------
 503 // MyPrintout
 504 // ----------------------------------------------------------------------------
 505
 506 bool MyPrintout::OnPrintPage(int page)
 507 {
 508     wxDC *dc = GetDC();
 509     if (dc)
 510     {
 511         if (page == 1)
 512             DrawPageOne();
 513         else if (page == 2)
 514             DrawPageTwo();
 515
 516         // Draw page numbers at top left corner of printable area, sized so that
 517         // screen size of text matches paper size.
 518         MapScreenSizeToPage();
 519
 520         dc->DrawText(wxString::Format(wxT("PAGE %d"), page), 0, 0);
 521
 522         return true;
 523     }
 524     else
 525         return false;
 526 }
 527
 528 bool MyPrintout::OnBeginDocument(int startPage, int endPage)
 529 {
 530     if (!wxPrintout::OnBeginDocument(startPage, endPage))
 531         return false;
 532
 533     return true;
 534 }
 535
 536 void MyPrintout::GetPageInfo(int *minPage, int *maxPage, int *selPageFrom, int *selPageTo)
 537 {
 538     *minPage = 1;
 539     *maxPage = 2;
 540     *selPageFrom = 1;
 541     *selPageTo = 2;
 542 }
 543
 544 bool MyPrintout::HasPage(int pageNum)
 545 {
 546     return (pageNum == 1 || pageNum == 2);
 547 }
 548
 549 void MyPrintout::DrawPageOne()
 550 {
 551     // You might use THIS code if you were scaling graphics of known size to fit
 552     // on the page. The commented-out code illustrates different ways of scaling
 553     // the graphics.
 554
 555     // We know the graphic is 230x350. If we didn't know this, we'd need to
 556     // calculate it.
 557     wxCoord maxX = 230;
 558     wxCoord maxY = 350;
 559
 560     // This sets the user scale and origin of the DC so that the image fits
 561     // within the paper rectangle (but the edges could be cut off by printers
 562     // that can't print to the edges of the paper -- which is most of them. Use
 563     // this if your image already has its own margins.
 564 //    FitThisSizeToPaper(wxSize(maxX, maxY));
 565 //    wxRect fitRect = GetLogicalPaperRect();
 566
 567     // This sets the user scale and origin of the DC so that the image fits
 568     // within the page rectangle, which is the printable area on Mac and MSW
 569     // and is the entire page on other platforms.
 570 //    FitThisSizeToPage(wxSize(maxX, maxY));
 571 //    wxRect fitRect = GetLogicalPageRect();
 572
 573     // This sets the user scale and origin of the DC so that the image fits
 574     // within the page margins as specified by g_PageSetupData, which you can
 575     // change (on some platforms, at least) in the Page Setup dialog. Note that
 576     // on Mac, the native Page Setup dialog doesn't let you change the margins
 577     // of a wxPageSetupDialogData object, so you'll have to write your own dialog or
 578     // use the Mac-only wxMacPageMarginsDialog, as we do in this program.
 579     FitThisSizeToPageMargins(wxSize(maxX, maxY), *g_pageSetupData);
 580     wxRect fitRect = GetLogicalPageMarginsRect(*g_pageSetupData);
 581
 582     // This sets the user scale and origin of the DC so that the image appears
 583     // on the paper at the same size that it appears on screen (i.e., 10-point
 584     // type on screen is 10-point on the printed page) and is positioned in the
 585     // top left corner of the page rectangle (just as the screen image appears
 586     // in the top left corner of the window).
 587 //    MapScreenSizeToPage();
 588 //    wxRect fitRect = GetLogicalPageRect();
 589
 590     // You could also map the screen image to the entire paper at the same size
 591     // as it appears on screen.
 592 //    MapScreenSizeToPaper();
 593 //    wxRect fitRect = GetLogicalPaperRect();
 594
 595     // You might also wish to do you own scaling in order to draw objects at
 596     // full native device resolution. In this case, you should do the following.
 597     // Note that you can use the GetLogicalXXXRect() commands to obtain the
 598     // appropriate rect to scale to.
 599 //    MapScreenSizeToDevice();
 600 //    wxRect fitRect = GetLogicalPageRect();
 601
 602     // Each of the preceding Fit or Map routines positions the origin so that
 603     // the drawn image is positioned at the top left corner of the reference
 604     // rectangle. You can easily center or right- or bottom-justify the image as
 605     // follows.
 606
 607     // This offsets the image so that it is centered within the reference
 608     // rectangle defined above.
 609     wxCoord xoff = (fitRect.width - maxX) / 2;
 610     wxCoord yoff = (fitRect.height - maxY) / 2;
 611     OffsetLogicalOrigin(xoff, yoff);
 612
 613     // This offsets the image so that it is positioned at the bottom right of
 614     // the reference rectangle defined above.
 615 //    wxCoord xoff = (fitRect.width - maxX);
 616 //    wxCoord yoff = (fitRect.height - maxY);
 617 //    OffsetLogicalOrigin(xoff, yoff);
 618
 619     wxGetApp().Draw(*GetDC());
 620 }
 621
 622 void MyPrintout::DrawPageTwo()
 623 {
 624     // You might use THIS code to set the printer DC to ROUGHLY reflect
 625     // the screen text size. This page also draws lines of actual length
 626     // 5cm on the page.
 627
 628     // Compare this to DrawPageOne(), which uses the really convenient routines
 629     // from wxPrintout to fit the screen image onto the printed page. This page
 630     // illustrates how to do all the scaling calculations yourself, if you're so
 631     // inclined.
 632
 633     wxDC *dc = GetDC();
 634
 635     // Get the logical pixels per inch of screen and printer
 636     int ppiScreenX, ppiScreenY;
 637     GetPPIScreen(&ppiScreenX, &ppiScreenY);
 638     int ppiPrinterX, ppiPrinterY;
 639     GetPPIPrinter(&ppiPrinterX, &ppiPrinterY);
 640
 641     // This scales the DC so that the printout roughly represents the the screen
 642     // scaling. The text point size _should_ be the right size but in fact is
 643     // too small for some reason. This is a detail that will need to be
 644     // addressed at some point but can be fudged for the moment.
 645     float scale = (float)((float)ppiPrinterX/(float)ppiScreenX);
 646
 647     // Now we have to check in case our real page size is reduced (e.g. because
 648     // we're drawing to a print preview memory DC)
 649     int pageWidth, pageHeight;
 650     int w, h;
 651     dc->GetSize(&w, &h);
 652     GetPageSizePixels(&pageWidth, &pageHeight);
 653
 654     // If printer pageWidth == current DC width, then this doesn't change. But w
 655     // might be the preview bitmap width, so scale down.
 656     float overallScale = scale * (float)(w/(float)pageWidth);
 657     dc->SetUserScale(overallScale, overallScale);
 658
 659     // Calculate conversion factor for converting millimetres into logical
 660     // units. There are approx. 25.4 mm to the inch. There are ppi device units
 661     // to the inch. Therefore 1 mm corresponds to ppi/25.4 device units. We also
 662     // divide by the screen-to-printer scaling factor, because we need to
 663     // unscale to pass logical units to DrawLine.
 664
 665     // Draw 50 mm by 50 mm L shape
 666     float logUnitsFactor = (float)(ppiPrinterX/(scale*25.4));
 667     float logUnits = (float)(50*logUnitsFactor);
 668     dc->SetPen(* wxBLACK_PEN);
 669     dc->DrawLine(50, 250, (long)(50.0 + logUnits), 250);
 670     dc->DrawLine(50, 250, 50, (long)(250.0 + logUnits));
 671
 672     dc->SetBackgroundMode(wxTRANSPARENT);
 673     dc->SetBrush(*wxTRANSPARENT_BRUSH);
 674
 675     { // GetTextExtent demo:
 676         wxString words[7] = { wxT("This "), wxT("is "), wxT("GetTextExtent "),
 677                              wxT("testing "), wxT("string. "), wxT("Enjoy "), wxT("it!") };
 678         wxCoord w, h;
 679         long x = 200, y= 250;
 680         wxFont fnt(15, wxSWISS, wxNORMAL, wxNORMAL);
 681
 682         dc->SetFont(fnt);
 683
 684         for (int i = 0; i < 7; i++)
 685         {
 686             wxString word = words[i];
 687             word.Remove( word.Len()-1, 1 );
 688             dc->GetTextExtent(word, &w, &h);
 689             dc->DrawRectangle(x, y, w, h);
 690             dc->GetTextExtent(words[i], &w, &h);
 691             dc->DrawText(words[i], x, y);
 692             x += w;
 693         }
 694
 695     }
 696
 697     dc->SetFont(wxGetApp().GetTestFont());
 698
 699     dc->DrawText(wxT("Some test text"), 200, 300 );
 700
 701     // TESTING
 702
 703     int leftMargin = 20;
 704     int rightMargin = 20;
 705     int topMargin = 20;
 706     int bottomMargin = 20;
 707
 708     int pageWidthMM, pageHeightMM;
 709     GetPageSizeMM(&pageWidthMM, &pageHeightMM);
 710
 711     float leftMarginLogical = (float)(logUnitsFactor*leftMargin);
 712     float topMarginLogical = (float)(logUnitsFactor*topMargin);
 713     float bottomMarginLogical = (float)(logUnitsFactor*(pageHeightMM - bottomMargin));
 714     float rightMarginLogical = (float)(logUnitsFactor*(pageWidthMM - rightMargin));
 715
 716     dc->SetPen(* wxRED_PEN);
 717     dc->DrawLine( (long)leftMarginLogical, (long)topMarginLogical,
 718         (long)rightMarginLogical, (long)topMarginLogical);
 719     dc->DrawLine( (long)leftMarginLogical, (long)bottomMarginLogical,
 720         (long)rightMarginLogical,  (long)bottomMarginLogical);
 721
 722     WritePageHeader(this, dc, wxT("A header"), logUnitsFactor);
 723 }
 724
 725 // Writes a header on a page. Margin units are in millimetres.
 726 bool MyPrintout::WritePageHeader(wxPrintout *printout, wxDC *dc, const wxString&text, float mmToLogical)
 727 {
 728 #if 0
 729     static wxFont *headerFont = (wxFont *) NULL;
 730     if (!headerFont)
 731     {
 732         headerFont = wxTheFontList->FindOrCreateFont(16, wxSWISS, wxNORMAL, wxBOLD);
 733     }
 734     dc->SetFont(headerFont);
 735 #endif
 736
 737     int pageWidthMM, pageHeightMM;
 738
 739     printout->GetPageSizeMM(&pageWidthMM, &pageHeightMM);
 740     wxUnusedVar(pageHeightMM);
 741
 742     int leftMargin = 10;
 743     int topMargin = 10;
 744     int rightMargin = 10;
 745
 746     float leftMarginLogical = (float)(mmToLogical*leftMargin);
 747     float topMarginLogical = (float)(mmToLogical*topMargin);
 748     float rightMarginLogical = (float)(mmToLogical*(pageWidthMM - rightMargin));
 749
 750     wxCoord xExtent, yExtent;
 751     dc->GetTextExtent(text, &xExtent, &yExtent);
 752
 753     float xPos = (float)(((((pageWidthMM - leftMargin - rightMargin)/2.0)+leftMargin)*mmToLogical) - (xExtent/2.0));
 754     dc->DrawText(text, (long)xPos, (long)topMarginLogical);
 755
 756     dc->SetPen(* wxBLACK_PEN);
 757     dc->DrawLine( (long)leftMarginLogical, (long)(topMarginLogical+yExtent),
 758                   (long)rightMarginLogical, (long)topMarginLogical+yExtent );
 759
 760     return true;
 761 }