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 #ifdef __WXMSW__
 234     wxEnhMetaFileDC *emf_dc = wxDynamicCast( &dc, wxEnhMetaFileDC );
 235     if (emf_dc)
 236         gc = wxGraphicsContext::Create( *emf_dc );
 237 #endif
 238
 239     if (gc)
 240     {
 241         // make a path that contains a circle and some lines, centered at 100,100
 242         gc->SetPen( *wxRED_PEN );
 243
 244         wxGraphicsPath path = gc->CreatePath();
 245         path.AddCircle( 50.0, 50.0, 50.0 );
 246         path.MoveToPoint(0.0, 50.0);
 247         path.AddLineToPoint(100.0, 50.0);
 248         path.MoveToPoint(50.0, 0.0);
 249         path.AddLineToPoint(50.0, 100.0 );
 250         path.CloseSubpath();
 251         path.AddRectangle(25.0, 25.0, 50.0, 50.0);
 252
 253         gc->StrokePath(path);
 254
 255         // draw some text
 256         wxString text("Text by wxGraphicsContext");
 257         gc->SetFont( m_testFont, *wxBLACK );
 258         gc->DrawText(text, 25.0, 60.0);
 259
 260         // draw rectangle around the text
 261         double w, h, d, el;
 262         gc->GetTextExtent(text, &w, &h, &d, &el);
 263         gc->SetPen( *wxBLACK_PEN );
 264         gc->DrawRectangle(25.0, 60.0, w, h);
 265
 266         delete gc;
 267     }
 268 #endif
 269 }
 270
 271
 272 // ----------------------------------------------------------------------------
 273 // MyFrame
 274 // ----------------------------------------------------------------------------
 275
 276 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 277     EVT_MENU(wxID_EXIT, MyFrame::OnExit)
 278     EVT_MENU(wxID_PRINT, MyFrame::OnPrint)
 279     EVT_MENU(wxID_PREVIEW, MyFrame::OnPrintPreview)
 280     EVT_MENU(WXPRINT_PAGE_SETUP, MyFrame::OnPageSetup)
 281     EVT_MENU(wxID_ABOUT, MyFrame::OnPrintAbout)
 282 #if defined(__WXMSW__) &&wxTEST_POSTSCRIPT_IN_MSW
 283     EVT_MENU(WXPRINT_PRINT_PS, MyFrame::OnPrintPS)
 284     EVT_MENU(WXPRINT_PREVIEW_PS, MyFrame::OnPrintPreviewPS)
 285     EVT_MENU(WXPRINT_PAGE_SETUP_PS, MyFrame::OnPageSetupPS)
 286 #endif
 287 #ifdef __WXMAC__
 288     EVT_MENU(WXPRINT_PAGE_MARGINS, MyFrame::OnPageMargins)
 289 #endif
 290     EVT_MENU(WXPRINT_ANGLEUP, MyFrame::OnAngleUp)
 291     EVT_MENU(WXPRINT_ANGLEDOWN, MyFrame::OnAngleDown)
 292 END_EVENT_TABLE()
 293
 294 MyFrame::MyFrame(wxFrame *frame, const wxString&title, const wxPoint&pos, const wxSize&size)
 295         : wxFrame(frame, wxID_ANY, title, pos, size)
 296 {
 297     m_canvas = NULL;
 298
 299 #if wxUSE_STATUSBAR
 300     // Give us a status line
 301     CreateStatusBar(2);
 302     SetStatusText(wxT("Printing demo"));
 303 #endif // wxUSE_STATUSBAR
 304
 305     // Load icon and bitmap
 306     SetIcon( wxICON( mondrian) );
 307
 308     // Make a menubar
 309     wxMenu *file_menu = new wxMenu;
 310
 311     file_menu->Append(wxID_PRINT, wxT("&Print..."),                 wxT("Print"));
 312     file_menu->Append(WXPRINT_PAGE_SETUP, wxT("Page Set&up..."),    wxT("Page setup"));
 313 #ifdef __WXMAC__
 314     file_menu->Append(WXPRINT_PAGE_MARGINS, wxT("Page Margins..."), wxT("Page margins"));
 315 #endif
 316     file_menu->Append(wxID_PREVIEW, wxT("Print Pre&view"),          wxT("Preview"));
 317
 318 #if wxUSE_ACCEL
 319     // Accelerators
 320     wxAcceleratorEntry entries[1];
 321     entries[0].Set(wxACCEL_CTRL, (int) 'V', wxID_PREVIEW);
 322     wxAcceleratorTable accel(1, entries);
 323     SetAcceleratorTable(accel);
 324 #endif
 325
 326 #if defined(__WXMSW__) &&wxTEST_POSTSCRIPT_IN_MSW
 327     file_menu->AppendSeparator();
 328     file_menu->Append(WXPRINT_PRINT_PS, wxT("Print PostScript..."),           wxT("Print (PostScript)"));
 329     file_menu->Append(WXPRINT_PAGE_SETUP_PS, wxT("Page Setup PostScript..."), wxT("Page setup (PostScript)"));
 330     file_menu->Append(WXPRINT_PREVIEW_PS, wxT("Print Preview PostScript"),    wxT("Preview (PostScript)"));
 331 #endif
 332
 333     file_menu->AppendSeparator();
 334     file_menu->Append(WXPRINT_ANGLEUP, wxT("Angle up\tAlt-U"),                wxT("Raise rotated text angle"));
 335     file_menu->Append(WXPRINT_ANGLEDOWN, wxT("Angle down\tAlt-D"),            wxT("Lower rotated text angle"));
 336     file_menu->AppendSeparator();
 337     file_menu->Append(wxID_EXIT, wxT("E&xit"),                                wxT("Exit program"));
 338
 339     wxMenu *help_menu = new wxMenu;
 340     help_menu->Append(wxID_ABOUT, wxT("&About"),                              wxT("About this demo"));
 341
 342     wxMenuBar *menu_bar = new wxMenuBar;
 343
 344     menu_bar->Append(file_menu, wxT("&File"));
 345     menu_bar->Append(help_menu, wxT("&Help"));
 346
 347     // Associate the menu bar with the frame
 348     SetMenuBar(menu_bar);
 349
 350
 351     // create the canvas
 352     // -----------------
 353
 354     m_canvas = new MyCanvas(this, wxPoint(0, 0), wxSize(100, 100),
 355                             wxRETAINED|wxHSCROLL|wxVSCROLL);
 356
 357     // Give it scrollbars: the virtual canvas is 20 * 50 = 1000 pixels in each direction
 358     m_canvas->SetScrollbars(20, 20, 50, 50);
 359 }
 360
 361 void MyFrame::OnExit(wxCommandEvent& WXUNUSED(event))
 362 {
 363     Close(true /*force closing*/);
 364 }
 365
 366 void MyFrame::OnPrint(wxCommandEvent& WXUNUSED(event))
 367 {
 368     wxPrintDialogData printDialogData(* g_printData);
 369
 370     wxPrinter printer(&printDialogData);
 371     MyPrintout printout(this, wxT("My printout"));
 372     if (!printer.Print(this, &printout, true /*prompt*/))
 373     {
 374         if (wxPrinter::GetLastError() == wxPRINTER_ERROR)
 375         {
 376             wxLogError(wxT("There was a problem printing. Perhaps your current printer is not set correctly?"));
 377         }
 378         else
 379         {
 380             wxLogMessage(wxT("You canceled printing"));
 381         }
 382     }
 383     else
 384     {
 385         (*g_printData) = printer.GetPrintDialogData().GetPrintData();
 386     }
 387 }
 388
 389 void MyFrame::OnPrintPreview(wxCommandEvent& WXUNUSED(event))
 390 {
 391     // Pass two printout objects: for preview, and possible printing.
 392     wxPrintDialogData printDialogData(* g_printData);
 393     wxPrintPreview *preview =
 394         new wxPrintPreview(new MyPrintout(this), new MyPrintout(this), &printDialogData);
 395     if (!preview->IsOk())
 396     {
 397         delete preview;
 398         wxLogError(wxT("There was a problem previewing.\nPerhaps your current printer is not set correctly?"));
 399         return;
 400     }
 401
 402     wxPreviewFrame *frame =
 403         new wxPreviewFrame(preview, this, wxT("Demo Print Preview"), wxPoint(100, 100), wxSize(600, 650));
 404     frame->Centre(wxBOTH);
 405     frame->Initialize();
 406     frame->Show();
 407 }
 408
 409 void MyFrame::OnPageSetup(wxCommandEvent& WXUNUSED(event))
 410 {
 411     (*g_pageSetupData) = *g_printData;
 412
 413     wxPageSetupDialog pageSetupDialog(this, g_pageSetupData);
 414     pageSetupDialog.ShowModal();
 415
 416     (*g_printData) = pageSetupDialog.GetPageSetupDialogData().GetPrintData();
 417     (*g_pageSetupData) = pageSetupDialog.GetPageSetupDialogData();
 418 }
 419
 420 #if defined(__WXMSW__) && wxTEST_POSTSCRIPT_IN_MSW
 421 void MyFrame::OnPrintPS(wxCommandEvent& WXUNUSED(event))
 422 {
 423     wxPostScriptPrinter printer(g_printData);
 424     MyPrintout printout(wxT("My printout"));
 425     printer.Print(this, &printout, true/*prompt*/);
 426
 427     (*g_printData) = printer.GetPrintData();
 428 }
 429
 430 void MyFrame::OnPrintPreviewPS(wxCommandEvent& WXUNUSED(event))
 431 {
 432     // Pass two printout objects: for preview, and possible printing.
 433     wxPrintDialogData printDialogData(* g_printData);
 434     wxPrintPreview *preview = new wxPrintPreview(new MyPrintout, new MyPrintout, &printDialogData);
 435     wxPreviewFrame *frame =
 436         new wxPreviewFrame(preview, this, wxT("Demo Print Preview"), wxPoint(100, 100), wxSize(600, 650));
 437     frame->Centre(wxBOTH);
 438     frame->Initialize();
 439     frame->Show();
 440 }
 441
 442 void MyFrame::OnPageSetupPS(wxCommandEvent& WXUNUSED(event))
 443 {
 444     (*g_pageSetupData) = * g_printData;
 445
 446     wxGenericPageSetupDialog pageSetupDialog(this, g_pageSetupData);
 447     pageSetupDialog.ShowModal();
 448
 449     (*g_printData) = pageSetupDialog.GetPageSetupDialogData().GetPrintData();
 450     (*g_pageSetupData) = pageSetupDialog.GetPageSetupDialogData();
 451 }
 452 #endif
 453
 454 #ifdef __WXMAC__
 455 void MyFrame::OnPageMargins(wxCommandEvent& WXUNUSED(event))
 456 {
 457     (*g_pageSetupData) = *g_printData;
 458
 459     wxMacPageMarginsDialog pageMarginsDialog(this, g_pageSetupData);
 460     pageMarginsDialog.ShowModal();
 461
 462     (*g_printData) = pageMarginsDialog.GetPageSetupDialogData().GetPrintData();
 463     (*g_pageSetupData) = pageMarginsDialog.GetPageSetupDialogData();
 464 }
 465 #endif
 466
 467 void MyFrame::OnPrintAbout(wxCommandEvent& WXUNUSED(event))
 468 {
 469     (void)wxMessageBox(wxT("wxWidgets printing demo\nAuthor: Julian Smart"),
 470                        wxT("About wxWidgets printing demo"), wxOK|wxCENTRE);
 471 }
 472
 473 void MyFrame::OnAngleUp(wxCommandEvent& WXUNUSED(event))
 474 {
 475     wxGetApp().IncrementAngle();
 476     m_canvas->Refresh();
 477 }
 478
 479 void MyFrame::OnAngleDown(wxCommandEvent& WXUNUSED(event))
 480 {
 481     wxGetApp().DecrementAngle();
 482     m_canvas->Refresh();
 483 }
 484
 485
 486 // ----------------------------------------------------------------------------
 487 // MyCanvas
 488 // ----------------------------------------------------------------------------
 489
 490 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 491   //  EVT_PAINT(MyCanvas::OnPaint)
 492 END_EVENT_TABLE()
 493
 494 MyCanvas::MyCanvas(wxFrame *frame, const wxPoint&pos, const wxSize&size, long style)
 495     : wxScrolledWindow(frame, wxID_ANY, pos, size, style)
 496 {
 497     SetBackgroundColour(*wxWHITE);
 498 }
 499
 500 //void MyCanvas::OnPaint(wxPaintEvent& WXUNUSED(evt))
 501 void MyCanvas::OnDraw(wxDC& dc)
 502 {
 503     //wxPaintDC dc(this);
 504     wxGetApp().Draw(dc);
 505 }
 506
 507
 508 // ----------------------------------------------------------------------------
 509 // MyPrintout
 510 // ----------------------------------------------------------------------------
 511
 512 bool MyPrintout::OnPrintPage(int page)
 513 {
 514     wxDC *dc = GetDC();
 515     if (dc)
 516     {
 517         if (page == 1)
 518             DrawPageOne();
 519         else if (page == 2)
 520             DrawPageTwo();
 521
 522         // Draw page numbers at top left corner of printable area, sized so that
 523         // screen size of text matches paper size.
 524         MapScreenSizeToPage();
 525
 526         dc->DrawText(wxString::Format(wxT("PAGE %d"), page), 0, 0);
 527
 528         return true;
 529     }
 530     else
 531         return false;
 532 }
 533
 534 bool MyPrintout::OnBeginDocument(int startPage, int endPage)
 535 {
 536     if (!wxPrintout::OnBeginDocument(startPage, endPage))
 537         return false;
 538
 539     return true;
 540 }
 541
 542 void MyPrintout::GetPageInfo(int *minPage, int *maxPage, int *selPageFrom, int *selPageTo)
 543 {
 544     *minPage = 1;
 545     *maxPage = 2;
 546     *selPageFrom = 1;
 547     *selPageTo = 2;
 548 }
 549
 550 bool MyPrintout::HasPage(int pageNum)
 551 {
 552     return (pageNum == 1 || pageNum == 2);
 553 }
 554
 555 void MyPrintout::DrawPageOne()
 556 {
 557     // You might use THIS code if you were scaling graphics of known size to fit
 558     // on the page. The commented-out code illustrates different ways of scaling
 559     // the graphics.
 560
 561     // We know the graphic is 230x350. If we didn't know this, we'd need to
 562     // calculate it.
 563     wxCoord maxX = 230;
 564     wxCoord maxY = 350;
 565
 566     // This sets the user scale and origin of the DC so that the image fits
 567     // within the paper rectangle (but the edges could be cut off by printers
 568     // that can't print to the edges of the paper -- which is most of them. Use
 569     // this if your image already has its own margins.
 570 //    FitThisSizeToPaper(wxSize(maxX, maxY));
 571 //    wxRect fitRect = GetLogicalPaperRect();
 572
 573     // This sets the user scale and origin of the DC so that the image fits
 574     // within the page rectangle, which is the printable area on Mac and MSW
 575     // and is the entire page on other platforms.
 576 //    FitThisSizeToPage(wxSize(maxX, maxY));
 577 //    wxRect fitRect = GetLogicalPageRect();
 578
 579     // This sets the user scale and origin of the DC so that the image fits
 580     // within the page margins as specified by g_PageSetupData, which you can
 581     // change (on some platforms, at least) in the Page Setup dialog. Note that
 582     // on Mac, the native Page Setup dialog doesn't let you change the margins
 583     // of a wxPageSetupDialogData object, so you'll have to write your own dialog or
 584     // use the Mac-only wxMacPageMarginsDialog, as we do in this program.
 585     FitThisSizeToPageMargins(wxSize(maxX, maxY), *g_pageSetupData);
 586     wxRect fitRect = GetLogicalPageMarginsRect(*g_pageSetupData);
 587
 588     // This sets the user scale and origin of the DC so that the image appears
 589     // on the paper at the same size that it appears on screen (i.e., 10-point
 590     // type on screen is 10-point on the printed page) and is positioned in the
 591     // top left corner of the page rectangle (just as the screen image appears
 592     // in the top left corner of the window).
 593 //    MapScreenSizeToPage();
 594 //    wxRect fitRect = GetLogicalPageRect();
 595
 596     // You could also map the screen image to the entire paper at the same size
 597     // as it appears on screen.
 598 //    MapScreenSizeToPaper();
 599 //    wxRect fitRect = GetLogicalPaperRect();
 600
 601     // You might also wish to do you own scaling in order to draw objects at
 602     // full native device resolution. In this case, you should do the following.
 603     // Note that you can use the GetLogicalXXXRect() commands to obtain the
 604     // appropriate rect to scale to.
 605 //    MapScreenSizeToDevice();
 606 //    wxRect fitRect = GetLogicalPageRect();
 607
 608     // Each of the preceding Fit or Map routines positions the origin so that
 609     // the drawn image is positioned at the top left corner of the reference
 610     // rectangle. You can easily center or right- or bottom-justify the image as
 611     // follows.
 612
 613     // This offsets the image so that it is centered within the reference
 614     // rectangle defined above.
 615     wxCoord xoff = (fitRect.width - maxX) / 2;
 616     wxCoord yoff = (fitRect.height - maxY) / 2;
 617     OffsetLogicalOrigin(xoff, yoff);
 618
 619     // This offsets the image so that it is positioned at the bottom right of
 620     // the reference rectangle defined above.
 621 //    wxCoord xoff = (fitRect.width - maxX);
 622 //    wxCoord yoff = (fitRect.height - maxY);
 623 //    OffsetLogicalOrigin(xoff, yoff);
 624
 625     wxGetApp().Draw(*GetDC());
 626 }
 627
 628 void MyPrintout::DrawPageTwo()
 629 {
 630     // You might use THIS code to set the printer DC to ROUGHLY reflect
 631     // the screen text size. This page also draws lines of actual length
 632     // 5cm on the page.
 633
 634     // Compare this to DrawPageOne(), which uses the really convenient routines
 635     // from wxPrintout to fit the screen image onto the printed page. This page
 636     // illustrates how to do all the scaling calculations yourself, if you're so
 637     // inclined.
 638
 639     wxDC *dc = GetDC();
 640
 641     // Get the logical pixels per inch of screen and printer
 642     int ppiScreenX, ppiScreenY;
 643     GetPPIScreen(&ppiScreenX, &ppiScreenY);
 644     int ppiPrinterX, ppiPrinterY;
 645     GetPPIPrinter(&ppiPrinterX, &ppiPrinterY);
 646
 647     // This scales the DC so that the printout roughly represents the the screen
 648     // scaling. The text point size _should_ be the right size but in fact is
 649     // too small for some reason. This is a detail that will need to be
 650     // addressed at some point but can be fudged for the moment.
 651     float scale = (float)((float)ppiPrinterX/(float)ppiScreenX);
 652
 653     // Now we have to check in case our real page size is reduced (e.g. because
 654     // we're drawing to a print preview memory DC)
 655     int pageWidth, pageHeight;
 656     int w, h;
 657     dc->GetSize(&w, &h);
 658     GetPageSizePixels(&pageWidth, &pageHeight);
 659
 660     // If printer pageWidth == current DC width, then this doesn't change. But w
 661     // might be the preview bitmap width, so scale down.
 662     float overallScale = scale * (float)(w/(float)pageWidth);
 663     dc->SetUserScale(overallScale, overallScale);
 664
 665     // Calculate conversion factor for converting millimetres into logical
 666     // units. There are approx. 25.4 mm to the inch. There are ppi device units
 667     // to the inch. Therefore 1 mm corresponds to ppi/25.4 device units. We also
 668     // divide by the screen-to-printer scaling factor, because we need to
 669     // unscale to pass logical units to DrawLine.
 670
 671     // Draw 50 mm by 50 mm L shape
 672     float logUnitsFactor = (float)(ppiPrinterX/(scale*25.4));
 673     float logUnits = (float)(50*logUnitsFactor);
 674     dc->SetPen(* wxBLACK_PEN);
 675     dc->DrawLine(50, 250, (long)(50.0 + logUnits), 250);
 676     dc->DrawLine(50, 250, 50, (long)(250.0 + logUnits));
 677
 678     dc->SetBackgroundMode(wxTRANSPARENT);
 679     dc->SetBrush(*wxTRANSPARENT_BRUSH);
 680
 681     { // GetTextExtent demo:
 682         wxString words[7] = { wxT("This "), wxT("is "), wxT("GetTextExtent "),
 683                              wxT("testing "), wxT("string. "), wxT("Enjoy "), wxT("it!") };
 684         wxCoord w, h;
 685         long x = 200, y= 250;
 686         wxFont fnt(15, wxSWISS, wxNORMAL, wxNORMAL);
 687
 688         dc->SetFont(fnt);
 689
 690         for (int i = 0; i < 7; i++)
 691         {
 692             wxString word = words[i];
 693             word.Remove( word.Len()-1, 1 );
 694             dc->GetTextExtent(word, &w, &h);
 695             dc->DrawRectangle(x, y, w, h);
 696             dc->GetTextExtent(words[i], &w, &h);
 697             dc->DrawText(words[i], x, y);
 698             x += w;
 699         }
 700
 701     }
 702
 703     dc->SetFont(wxGetApp().GetTestFont());
 704
 705     dc->DrawText(wxT("Some test text"), 200, 300 );
 706
 707     // TESTING
 708
 709     int leftMargin = 20;
 710     int rightMargin = 20;
 711     int topMargin = 20;
 712     int bottomMargin = 20;
 713
 714     int pageWidthMM, pageHeightMM;
 715     GetPageSizeMM(&pageWidthMM, &pageHeightMM);
 716
 717     float leftMarginLogical = (float)(logUnitsFactor*leftMargin);
 718     float topMarginLogical = (float)(logUnitsFactor*topMargin);
 719     float bottomMarginLogical = (float)(logUnitsFactor*(pageHeightMM - bottomMargin));
 720     float rightMarginLogical = (float)(logUnitsFactor*(pageWidthMM - rightMargin));
 721
 722     dc->SetPen(* wxRED_PEN);
 723     dc->DrawLine( (long)leftMarginLogical, (long)topMarginLogical,
 724         (long)rightMarginLogical, (long)topMarginLogical);
 725     dc->DrawLine( (long)leftMarginLogical, (long)bottomMarginLogical,
 726         (long)rightMarginLogical,  (long)bottomMarginLogical);
 727
 728     WritePageHeader(this, dc, wxT("A header"), logUnitsFactor);
 729 }
 730
 731 // Writes a header on a page. Margin units are in millimetres.
 732 bool MyPrintout::WritePageHeader(wxPrintout *printout, wxDC *dc, const wxString&text, float mmToLogical)
 733 {
 734 #if 0
 735     static wxFont *headerFont = (wxFont *) NULL;
 736     if (!headerFont)
 737     {
 738         headerFont = wxTheFontList->FindOrCreateFont(16, wxSWISS, wxNORMAL, wxBOLD);
 739     }
 740     dc->SetFont(headerFont);
 741 #endif
 742
 743     int pageWidthMM, pageHeightMM;
 744
 745     printout->GetPageSizeMM(&pageWidthMM, &pageHeightMM);
 746     wxUnusedVar(pageHeightMM);
 747
 748     int leftMargin = 10;
 749     int topMargin = 10;
 750     int rightMargin = 10;
 751
 752     float leftMarginLogical = (float)(mmToLogical*leftMargin);
 753     float topMarginLogical = (float)(mmToLogical*topMargin);
 754     float rightMarginLogical = (float)(mmToLogical*(pageWidthMM - rightMargin));
 755
 756     wxCoord xExtent, yExtent;
 757     dc->GetTextExtent(text, &xExtent, &yExtent);
 758
 759     float xPos = (float)(((((pageWidthMM - leftMargin - rightMargin)/2.0)+leftMargin)*mmToLogical) - (xExtent/2.0));
 760     dc->DrawText(text, (long)xPos, (long)topMarginLogical);
 761
 762     dc->SetPen(* wxBLACK_PEN);
 763     dc->DrawLine( (long)leftMarginLogical, (long)(topMarginLogical+yExtent),
 764                   (long)rightMarginLogical, (long)topMarginLogical+yExtent );
 765
 766     return true;
 767 }