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 #include <ctype.h>
  29 #include "wx/metafile.h"
  30 #include "wx/print.h"
  31 #include "wx/printdlg.h"
  32 #include "wx/image.h"
  33 #include "wx/accel.h"
  34
  35 #if wxUSE_POSTSCRIPT
  36     #include "wx/generic/printps.h"
  37     #include "wx/generic/prntdlgg.h"
  38 #endif
  39
  40 #if wxUSE_GRAPHICS_CONTEXT
  41     #include "wx/graphics.h"
  42 #endif
  43
  44 #ifdef __WXMAC__
  45     #include "wx/osx/printdlg.h"
  46 #endif
  47
  48 #include "printing.h"
  49
  50 #ifndef wxHAS_IMAGES_IN_RESOURCES
  51     #include "../sample.xpm"
  52 #endif
  53
  54 // Global print data, to remember settings during the session
  55 wxPrintData *g_printData = NULL;
  56
  57 // Global page setup data
  58 wxPageSetupDialogData* g_pageSetupData = NULL;
  59
  60
  61
  62 // ----------------------------------------------------------------------------
  63 // MyApp
  64 // ----------------------------------------------------------------------------
  65
  66 IMPLEMENT_APP(MyApp)
  67
  68 bool MyApp::OnInit(void)
  69 {
  70     if ( !wxApp::OnInit() )
  71         return false;
  72
  73     wxInitAllImageHandlers();
  74
  75
  76     // init global objects
  77     // -------------------
  78
  79     g_printData = new wxPrintData;
  80
  81     // You could set an initial paper size here
  82 #if 0
  83     g_printData->SetPaperId(wxPAPER_LETTER); // for Americans
  84     g_printData->SetPaperId(wxPAPER_A4);    // for everyone else
  85 #endif
  86
  87     g_pageSetupData = new wxPageSetupDialogData;
  88
  89     // copy over initial paper size from print record
  90     (*g_pageSetupData) = *g_printData;
  91
  92     // Set some initial page margins in mm.
  93     g_pageSetupData->SetMarginTopLeft(wxPoint(15, 15));
  94     g_pageSetupData->SetMarginBottomRight(wxPoint(15, 15));
  95
  96
  97     // init local GUI objects
  98     // ----------------------
  99
 100 #if 0
 101     wxImage image( wxT("test.jpg") );
 102     image.SetAlpha();
 103     int i,j;
 104     for (i = 0; i < image.GetWidth(); i++)
 105        for (j = 0; j < image.GetHeight(); j++)
 106           image.SetAlpha( i, j, 50 );
 107     m_bitmap = image;
 108 #endif
 109     m_angle = 30;
 110     m_testFont.Create(10, wxFONTFAMILY_SWISS, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL);
 111
 112
 113     // Create the main frame window
 114     // ----------------------------
 115
 116     MyFrame* frame = new MyFrame((wxFrame *) NULL, wxT("wxWidgets Printing Demo"),
 117                                  wxPoint(0, 0), wxSize(400, 400));
 118
 119     frame->Centre(wxBOTH);
 120     frame->Show();
 121
 122     return true;
 123 }
 124
 125 int MyApp::OnExit()
 126 {
 127     delete g_printData;
 128     delete g_pageSetupData;
 129
 130     return wxApp::OnExit();
 131 }
 132
 133 void MyApp::Draw(wxDC&dc)
 134 {
 135     // This routine just draws a bunch of random stuff on the screen so that we
 136     // can check that different types of object are being drawn consistently
 137     // between the screen image, the print preview image (at various zoom
 138     // levels), and the printed page.
 139     dc.SetBackground(*wxWHITE_BRUSH);
 140     // dc.Clear();
 141     dc.SetFont(m_testFont);
 142
 143     // dc.SetBackgroundMode(wxTRANSPARENT);
 144
 145     dc.SetPen(*wxBLACK_PEN);
 146     dc.SetBrush(*wxLIGHT_GREY_BRUSH);
 147
 148     dc.DrawRectangle(0, 0, 230, 350);
 149     dc.DrawLine(0, 0, 229, 349);
 150     dc.DrawLine(229, 0, 0, 349);
 151     dc.SetBrush(*wxTRANSPARENT_BRUSH);
 152
 153     dc.SetBrush(*wxCYAN_BRUSH);
 154     dc.SetPen(*wxRED_PEN);
 155
 156     dc.DrawRoundedRectangle(0, 20, 200, 80, 20);
 157
 158     dc.DrawText( wxT("Rectangle 200 by 80"), 40, 40);
 159
 160     dc.SetPen( wxPen(*wxBLACK, 0, wxPENSTYLE_DOT_DASH) );
 161     dc.DrawEllipse(50, 140, 100, 50);
 162     dc.SetPen(*wxRED_PEN);
 163
 164     dc.DrawText( wxT("Test message: this is in 10 point text"), 10, 180);
 165
 166 #if wxUSE_UNICODE
 167     const char *test = "Hebrew    שלום -- Japanese (日本語)";
 168     wxString tmp = wxConvUTF8.cMB2WC( test );
 169     dc.DrawText( tmp, 10, 200 );
 170 #endif
 171
 172     wxPoint points[5];
 173     points[0].x = 0;
 174     points[0].y = 0;
 175     points[1].x = 20;
 176     points[1].y = 0;
 177     points[2].x = 20;
 178     points[2].y = 20;
 179     points[3].x = 10;
 180     points[3].y = 20;
 181     points[4].x = 10;
 182     points[4].y = -20;
 183     dc.DrawPolygon( 5, points, 20, 250, wxODDEVEN_RULE );
 184     dc.DrawPolygon( 5, points, 50, 250, wxWINDING_RULE );
 185
 186     dc.DrawEllipticArc( 80, 250, 60, 30, 0.0, 270.0 );
 187
 188     points[0].x = 150;
 189     points[0].y = 250;
 190     points[1].x = 180;
 191     points[1].y = 250;
 192     points[2].x = 180;
 193     points[2].y = 220;
 194     points[3].x = 200;
 195     points[3].y = 220;
 196     dc.DrawSpline( 4, points );
 197
 198     dc.DrawArc( 20,10, 10,10, 25,40 );
 199
 200     wxString str;
 201     int i = 0;
 202     str.Printf( wxT("---- Text at angle %d ----"), i );
 203     dc.DrawRotatedText( str, 100, 300, i );
 204
 205     i = m_angle;
 206     str.Printf( wxT("---- Text at angle %d ----"), i );
 207     dc.DrawRotatedText( str, 100, 300, i );
 208
 209     wxIcon my_icon = wxICON(sample);
 210
 211     dc.DrawIcon( my_icon, 100, 100);
 212
 213     if (m_bitmap.IsOk())
 214         dc.DrawBitmap( m_bitmap, 10, 10 );
 215
 216 #if wxUSE_GRAPHICS_CONTEXT
 217     wxGraphicsContext *gc = NULL;
 218
 219     wxPrinterDC *printer_dc = wxDynamicCast( &dc, wxPrinterDC );
 220     if (printer_dc)
 221         gc = wxGraphicsContext::Create( *printer_dc );
 222
 223     wxWindowDC *window_dc = wxDynamicCast( &dc, wxWindowDC );
 224     if (window_dc)
 225         gc = wxGraphicsContext::Create( *window_dc );
 226
 227 #ifdef __WXMSW__
 228     wxEnhMetaFileDC *emf_dc = wxDynamicCast( &dc, wxEnhMetaFileDC );
 229     if (emf_dc)
 230         gc = wxGraphicsContext::Create( *emf_dc );
 231 #endif
 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("Text by wxGraphicsContext");
 251         gc->SetFont( m_testFont, *wxBLACK );
 252         gc->DrawText(text, 25.0, 60.0);
 253
 254         // draw rectangle around the text
 255         double w, h, d, el;
 256         gc->GetTextExtent(text, &w, &h, &d, &el);
 257         gc->SetPen( *wxBLACK_PEN );
 258         gc->DrawRectangle(25.0, 60.0, 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 wxUSE_POSTSCRIPT
 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
 287     EVT_MENU_RANGE(WXPRINT_FRAME_MODAL_APP,
 288                    WXPRINT_FRAME_MODAL_NON,
 289                    MyFrame::OnPreviewFrameModalityKind)
 290 END_EVENT_TABLE()
 291
 292 MyFrame::MyFrame(wxFrame *frame, const wxString&title, const wxPoint&pos, const wxSize&size)
 293         : wxFrame(frame, wxID_ANY, title, pos, size)
 294 {
 295     m_canvas = NULL;
 296     m_previewModality = wxPreviewFrame_AppModal;
 297
 298 #if wxUSE_STATUSBAR
 299     // Give us a status line
 300     CreateStatusBar(2);
 301     SetStatusText(wxT("Printing demo"));
 302 #endif // wxUSE_STATUSBAR
 303
 304     // Load icon and bitmap
 305     SetIcon( wxICON( sample) );
 306
 307     // Make a menubar
 308     wxMenu *file_menu = new wxMenu;
 309
 310     file_menu->Append(wxID_PRINT, wxT("&Print..."),                 wxT("Print"));
 311     file_menu->Append(WXPRINT_PAGE_SETUP, wxT("Page Set&up..."),    wxT("Page setup"));
 312 #ifdef __WXMAC__
 313     file_menu->Append(WXPRINT_PAGE_MARGINS, wxT("Page Margins..."), wxT("Page margins"));
 314 #endif
 315     file_menu->Append(wxID_PREVIEW, wxT("Print Pre&view"),          wxT("Preview"));
 316
 317     wxMenu * const menuModalKind = new wxMenu;
 318     menuModalKind->AppendRadioItem(WXPRINT_FRAME_MODAL_APP, "&App modal");
 319     menuModalKind->AppendRadioItem(WXPRINT_FRAME_MODAL_WIN, "&Window modal");
 320     menuModalKind->AppendRadioItem(WXPRINT_FRAME_MODAL_NON, "&Not modal");
 321     file_menu->AppendSubMenu(menuModalKind, "Preview frame &modal kind");
 322 #if wxUSE_ACCEL
 323     // Accelerators
 324     wxAcceleratorEntry entries[1];
 325     entries[0].Set(wxACCEL_CTRL, (int) 'V', wxID_PREVIEW);
 326     wxAcceleratorTable accel(1, entries);
 327     SetAcceleratorTable(accel);
 328 #endif
 329
 330 #if wxUSE_POSTSCRIPT
 331     file_menu->AppendSeparator();
 332     file_menu->Append(WXPRINT_PRINT_PS, wxT("Print PostScript..."),           wxT("Print (PostScript)"));
 333     file_menu->Append(WXPRINT_PAGE_SETUP_PS, wxT("Page Setup PostScript..."), wxT("Page setup (PostScript)"));
 334     file_menu->Append(WXPRINT_PREVIEW_PS, wxT("Print Preview PostScript"),    wxT("Preview (PostScript)"));
 335 #endif
 336
 337     file_menu->AppendSeparator();
 338     file_menu->Append(WXPRINT_ANGLEUP, wxT("Angle up\tAlt-U"),                wxT("Raise rotated text angle"));
 339     file_menu->Append(WXPRINT_ANGLEDOWN, wxT("Angle down\tAlt-D"),            wxT("Lower rotated text angle"));
 340     file_menu->AppendSeparator();
 341     file_menu->Append(wxID_EXIT, wxT("E&xit"),                                wxT("Exit program"));
 342
 343     wxMenu *help_menu = new wxMenu;
 344     help_menu->Append(wxID_ABOUT, wxT("&About"),                              wxT("About this demo"));
 345
 346     wxMenuBar *menu_bar = new wxMenuBar;
 347
 348     menu_bar->Append(file_menu, wxT("&File"));
 349     menu_bar->Append(help_menu, wxT("&Help"));
 350
 351     // Associate the menu bar with the frame
 352     SetMenuBar(menu_bar);
 353
 354
 355     // create the canvas
 356     // -----------------
 357
 358     m_canvas = new MyCanvas(this, wxPoint(0, 0), wxSize(100, 100),
 359                             wxRETAINED|wxHSCROLL|wxVSCROLL);
 360
 361     // Give it scrollbars: the virtual canvas is 20 * 50 = 1000 pixels in each direction
 362     m_canvas->SetScrollbars(20, 20, 50, 50);
 363 }
 364
 365 void MyFrame::OnExit(wxCommandEvent& WXUNUSED(event))
 366 {
 367     Close(true /*force closing*/);
 368 }
 369
 370 void MyFrame::OnPrint(wxCommandEvent& WXUNUSED(event))
 371 {
 372     wxPrintDialogData printDialogData(* g_printData);
 373
 374     wxPrinter printer(&printDialogData);
 375     MyPrintout printout(this, wxT("My printout"));
 376     if (!printer.Print(this, &printout, true /*prompt*/))
 377     {
 378         if (wxPrinter::GetLastError() == wxPRINTER_ERROR)
 379         {
 380             wxLogError(wxT("There was a problem printing. Perhaps your current printer is not set correctly?"));
 381         }
 382         else
 383         {
 384             wxLogMessage(wxT("You canceled printing"));
 385         }
 386     }
 387     else
 388     {
 389         (*g_printData) = printer.GetPrintDialogData().GetPrintData();
 390     }
 391 }
 392
 393 void MyFrame::OnPrintPreview(wxCommandEvent& WXUNUSED(event))
 394 {
 395     // Pass two printout objects: for preview, and possible printing.
 396     wxPrintDialogData printDialogData(* g_printData);
 397     wxPrintPreview *preview =
 398         new wxPrintPreview(new MyPrintout(this), new MyPrintout(this), &printDialogData);
 399     if (!preview->IsOk())
 400     {
 401         delete preview;
 402         wxLogError(wxT("There was a problem previewing.\nPerhaps your current printer is not set correctly?"));
 403         return;
 404     }
 405
 406     wxPreviewFrame *frame =
 407         new wxPreviewFrame(preview, this, wxT("Demo Print Preview"), wxPoint(100, 100), wxSize(600, 650));
 408     frame->Centre(wxBOTH);
 409     frame->InitializeWithModality(m_previewModality);
 410     frame->Show();
 411 }
 412
 413 void MyFrame::OnPageSetup(wxCommandEvent& WXUNUSED(event))
 414 {
 415     (*g_pageSetupData) = *g_printData;
 416
 417     wxPageSetupDialog pageSetupDialog(this, g_pageSetupData);
 418     pageSetupDialog.ShowModal();
 419
 420     (*g_printData) = pageSetupDialog.GetPageSetupDialogData().GetPrintData();
 421     (*g_pageSetupData) = pageSetupDialog.GetPageSetupDialogData();
 422 }
 423
 424 #if wxUSE_POSTSCRIPT
 425 void MyFrame::OnPrintPS(wxCommandEvent& WXUNUSED(event))
 426 {
 427     wxPrintDialogData printDialogData(* g_printData);
 428
 429     wxPostScriptPrinter printer(&printDialogData);
 430     MyPrintout printout(this, wxT("My printout"));
 431     printer.Print(this, &printout, true/*prompt*/);
 432
 433     (*g_printData) = printer.GetPrintDialogData().GetPrintData();
 434 }
 435
 436 void MyFrame::OnPrintPreviewPS(wxCommandEvent& WXUNUSED(event))
 437 {
 438     // Pass two printout objects: for preview, and possible printing.
 439     wxPrintDialogData printDialogData(* g_printData);
 440     wxPrintPreview *preview = new wxPrintPreview(new MyPrintout(this), new MyPrintout(this), &printDialogData);
 441     wxPreviewFrame *frame =
 442         new wxPreviewFrame(preview, this, wxT("Demo Print Preview"), wxPoint(100, 100), wxSize(600, 650));
 443     frame->Centre(wxBOTH);
 444     frame->Initialize();
 445     frame->Show();
 446 }
 447
 448 void MyFrame::OnPageSetupPS(wxCommandEvent& WXUNUSED(event))
 449 {
 450     (*g_pageSetupData) = * g_printData;
 451
 452     wxGenericPageSetupDialog pageSetupDialog(this, g_pageSetupData);
 453     pageSetupDialog.ShowModal();
 454
 455     (*g_printData) = pageSetupDialog.GetPageSetupDialogData().GetPrintData();
 456     (*g_pageSetupData) = pageSetupDialog.GetPageSetupDialogData();
 457 }
 458 #endif
 459
 460 #ifdef __WXMAC__
 461 void MyFrame::OnPageMargins(wxCommandEvent& WXUNUSED(event))
 462 {
 463     (*g_pageSetupData) = *g_printData;
 464
 465     wxMacPageMarginsDialog pageMarginsDialog(this, g_pageSetupData);
 466     pageMarginsDialog.ShowModal();
 467
 468     (*g_printData) = pageMarginsDialog.GetPageSetupDialogData().GetPrintData();
 469     (*g_pageSetupData) = pageMarginsDialog.GetPageSetupDialogData();
 470 }
 471 #endif
 472
 473 void MyFrame::OnPrintAbout(wxCommandEvent& WXUNUSED(event))
 474 {
 475     (void)wxMessageBox(wxT("wxWidgets printing demo\nAuthor: Julian Smart"),
 476                        wxT("About wxWidgets printing demo"), wxOK|wxCENTRE);
 477 }
 478
 479 void MyFrame::OnAngleUp(wxCommandEvent& WXUNUSED(event))
 480 {
 481     wxGetApp().IncrementAngle();
 482     m_canvas->Refresh();
 483 }
 484
 485 void MyFrame::OnAngleDown(wxCommandEvent& WXUNUSED(event))
 486 {
 487     wxGetApp().DecrementAngle();
 488     m_canvas->Refresh();
 489 }
 490
 491 void MyFrame::OnPreviewFrameModalityKind(wxCommandEvent& event)
 492 {
 493     m_previewModality = static_cast<wxPreviewFrameModalityKind>(
 494                             wxPreviewFrame_AppModal +
 495                                 (event.GetId() - WXPRINT_FRAME_MODAL_APP));
 496 }
 497
 498 // ----------------------------------------------------------------------------
 499 // MyCanvas
 500 // ----------------------------------------------------------------------------
 501
 502 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 503   //  EVT_PAINT(MyCanvas::OnPaint)
 504 END_EVENT_TABLE()
 505
 506 MyCanvas::MyCanvas(wxFrame *frame, const wxPoint&pos, const wxSize&size, long style)
 507     : wxScrolledWindow(frame, wxID_ANY, pos, size, style)
 508 {
 509     SetBackgroundColour(*wxWHITE);
 510 }
 511
 512 //void MyCanvas::OnPaint(wxPaintEvent& WXUNUSED(evt))
 513 void MyCanvas::OnDraw(wxDC& dc)
 514 {
 515     //wxPaintDC dc(this);
 516     wxGetApp().Draw(dc);
 517 }
 518
 519
 520 // ----------------------------------------------------------------------------
 521 // MyPrintout
 522 // ----------------------------------------------------------------------------
 523
 524 bool MyPrintout::OnPrintPage(int page)
 525 {
 526     wxDC *dc = GetDC();
 527     if (dc)
 528     {
 529         if (page == 1)
 530             DrawPageOne();
 531         else if (page == 2)
 532             DrawPageTwo();
 533
 534         // Draw page numbers at top left corner of printable area, sized so that
 535         // screen size of text matches paper size.
 536         MapScreenSizeToPage();
 537
 538         dc->DrawText(wxString::Format(wxT("PAGE %d"), page), 0, 0);
 539
 540         return true;
 541     }
 542     else
 543         return false;
 544 }
 545
 546 bool MyPrintout::OnBeginDocument(int startPage, int endPage)
 547 {
 548     if (!wxPrintout::OnBeginDocument(startPage, endPage))
 549         return false;
 550
 551     return true;
 552 }
 553
 554 void MyPrintout::GetPageInfo(int *minPage, int *maxPage, int *selPageFrom, int *selPageTo)
 555 {
 556     *minPage = 1;
 557     *maxPage = 2;
 558     *selPageFrom = 1;
 559     *selPageTo = 2;
 560 }
 561
 562 bool MyPrintout::HasPage(int pageNum)
 563 {
 564     return (pageNum == 1 || pageNum == 2);
 565 }
 566
 567 void MyPrintout::DrawPageOne()
 568 {
 569     // You might use THIS code if you were scaling graphics of known size to fit
 570     // on the page. The commented-out code illustrates different ways of scaling
 571     // the graphics.
 572
 573     // We know the graphic is 230x350. If we didn't know this, we'd need to
 574     // calculate it.
 575     wxCoord maxX = 230;
 576     wxCoord maxY = 350;
 577
 578     // This sets the user scale and origin of the DC so that the image fits
 579     // within the paper rectangle (but the edges could be cut off by printers
 580     // that can't print to the edges of the paper -- which is most of them. Use
 581     // this if your image already has its own margins.
 582 //    FitThisSizeToPaper(wxSize(maxX, maxY));
 583 //    wxRect fitRect = GetLogicalPaperRect();
 584
 585     // This sets the user scale and origin of the DC so that the image fits
 586     // within the page rectangle, which is the printable area on Mac and MSW
 587     // and is the entire page on other platforms.
 588 //    FitThisSizeToPage(wxSize(maxX, maxY));
 589 //    wxRect fitRect = GetLogicalPageRect();
 590
 591     // This sets the user scale and origin of the DC so that the image fits
 592     // within the page margins as specified by g_PageSetupData, which you can
 593     // change (on some platforms, at least) in the Page Setup dialog. Note that
 594     // on Mac, the native Page Setup dialog doesn't let you change the margins
 595     // of a wxPageSetupDialogData object, so you'll have to write your own dialog or
 596     // use the Mac-only wxMacPageMarginsDialog, as we do in this program.
 597     FitThisSizeToPageMargins(wxSize(maxX, maxY), *g_pageSetupData);
 598     wxRect fitRect = GetLogicalPageMarginsRect(*g_pageSetupData);
 599
 600     // This sets the user scale and origin of the DC so that the image appears
 601     // on the paper at the same size that it appears on screen (i.e., 10-point
 602     // type on screen is 10-point on the printed page) and is positioned in the
 603     // top left corner of the page rectangle (just as the screen image appears
 604     // in the top left corner of the window).
 605 //    MapScreenSizeToPage();
 606 //    wxRect fitRect = GetLogicalPageRect();
 607
 608     // You could also map the screen image to the entire paper at the same size
 609     // as it appears on screen.
 610 //    MapScreenSizeToPaper();
 611 //    wxRect fitRect = GetLogicalPaperRect();
 612
 613     // You might also wish to do you own scaling in order to draw objects at
 614     // full native device resolution. In this case, you should do the following.
 615     // Note that you can use the GetLogicalXXXRect() commands to obtain the
 616     // appropriate rect to scale to.
 617 //    MapScreenSizeToDevice();
 618 //    wxRect fitRect = GetLogicalPageRect();
 619
 620     // Each of the preceding Fit or Map routines positions the origin so that
 621     // the drawn image is positioned at the top left corner of the reference
 622     // rectangle. You can easily center or right- or bottom-justify the image as
 623     // follows.
 624
 625     // This offsets the image so that it is centered within the reference
 626     // rectangle defined above.
 627     wxCoord xoff = (fitRect.width - maxX) / 2;
 628     wxCoord yoff = (fitRect.height - maxY) / 2;
 629     OffsetLogicalOrigin(xoff, yoff);
 630
 631     // This offsets the image so that it is positioned at the bottom right of
 632     // the reference rectangle defined above.
 633 //    wxCoord xoff = (fitRect.width - maxX);
 634 //    wxCoord yoff = (fitRect.height - maxY);
 635 //    OffsetLogicalOrigin(xoff, yoff);
 636
 637     wxGetApp().Draw(*GetDC());
 638 }
 639
 640 void MyPrintout::DrawPageTwo()
 641 {
 642     // You might use THIS code to set the printer DC to ROUGHLY reflect
 643     // the screen text size. This page also draws lines of actual length
 644     // 5cm on the page.
 645
 646     // Compare this to DrawPageOne(), which uses the really convenient routines
 647     // from wxPrintout to fit the screen image onto the printed page. This page
 648     // illustrates how to do all the scaling calculations yourself, if you're so
 649     // inclined.
 650
 651     wxDC *dc = GetDC();
 652
 653     // Get the logical pixels per inch of screen and printer
 654     int ppiScreenX, ppiScreenY;
 655     GetPPIScreen(&ppiScreenX, &ppiScreenY);
 656     int ppiPrinterX, ppiPrinterY;
 657     GetPPIPrinter(&ppiPrinterX, &ppiPrinterY);
 658
 659     // This scales the DC so that the printout roughly represents the screen
 660     // scaling. The text point size _should_ be the right size but in fact is
 661     // too small for some reason. This is a detail that will need to be
 662     // addressed at some point but can be fudged for the moment.
 663     float scale = (float)((float)ppiPrinterX/(float)ppiScreenX);
 664
 665     // Now we have to check in case our real page size is reduced (e.g. because
 666     // we're drawing to a print preview memory DC)
 667     int pageWidth, pageHeight;
 668     int w, h;
 669     dc->GetSize(&w, &h);
 670     GetPageSizePixels(&pageWidth, &pageHeight);
 671
 672     // If printer pageWidth == current DC width, then this doesn't change. But w
 673     // might be the preview bitmap width, so scale down.
 674     float overallScale = scale * (float)(w/(float)pageWidth);
 675     dc->SetUserScale(overallScale, overallScale);
 676
 677     // Calculate conversion factor for converting millimetres into logical
 678     // units. There are approx. 25.4 mm to the inch. There are ppi device units
 679     // to the inch. Therefore 1 mm corresponds to ppi/25.4 device units. We also
 680     // divide by the screen-to-printer scaling factor, because we need to
 681     // unscale to pass logical units to DrawLine.
 682
 683     // Draw 50 mm by 50 mm L shape
 684     float logUnitsFactor = (float)(ppiPrinterX/(scale*25.4));
 685     float logUnits = (float)(50*logUnitsFactor);
 686     dc->SetPen(* wxBLACK_PEN);
 687     dc->DrawLine(50, 250, (long)(50.0 + logUnits), 250);
 688     dc->DrawLine(50, 250, 50, (long)(250.0 + logUnits));
 689
 690     dc->SetBackgroundMode(wxTRANSPARENT);
 691     dc->SetBrush(*wxTRANSPARENT_BRUSH);
 692
 693     { // GetTextExtent demo:
 694         wxString words[7] = { wxT("This "), wxT("is "), wxT("GetTextExtent "),
 695                              wxT("testing "), wxT("string. "), wxT("Enjoy "), wxT("it!") };
 696         wxCoord w, h;
 697         long x = 200, y= 250;
 698         wxFont fnt(15, wxSWISS, wxNORMAL, wxNORMAL);
 699
 700         dc->SetFont(fnt);
 701
 702         for (int i = 0; i < 7; i++)
 703         {
 704             wxString word = words[i];
 705             word.Remove( word.Len()-1, 1 );
 706             dc->GetTextExtent(word, &w, &h);
 707             dc->DrawRectangle(x, y, w, h);
 708             dc->GetTextExtent(words[i], &w, &h);
 709             dc->DrawText(words[i], x, y);
 710             x += w;
 711         }
 712
 713     }
 714
 715     dc->SetFont(wxGetApp().GetTestFont());
 716
 717     dc->DrawText(wxT("Some test text"), 200, 300 );
 718
 719     // TESTING
 720
 721     int leftMargin = 20;
 722     int rightMargin = 20;
 723     int topMargin = 20;
 724     int bottomMargin = 20;
 725
 726     int pageWidthMM, pageHeightMM;
 727     GetPageSizeMM(&pageWidthMM, &pageHeightMM);
 728
 729     float leftMarginLogical = (float)(logUnitsFactor*leftMargin);
 730     float topMarginLogical = (float)(logUnitsFactor*topMargin);
 731     float bottomMarginLogical = (float)(logUnitsFactor*(pageHeightMM - bottomMargin));
 732     float rightMarginLogical = (float)(logUnitsFactor*(pageWidthMM - rightMargin));
 733
 734     dc->SetPen(* wxRED_PEN);
 735     dc->DrawLine( (long)leftMarginLogical, (long)topMarginLogical,
 736         (long)rightMarginLogical, (long)topMarginLogical);
 737     dc->DrawLine( (long)leftMarginLogical, (long)bottomMarginLogical,
 738         (long)rightMarginLogical,  (long)bottomMarginLogical);
 739
 740     WritePageHeader(this, dc, wxT("A header"), logUnitsFactor);
 741 }
 742
 743 // Writes a header on a page. Margin units are in millimetres.
 744 bool MyPrintout::WritePageHeader(wxPrintout *printout, wxDC *dc, const wxString&text, float mmToLogical)
 745 {
 746 #if 0
 747     static wxFont *headerFont = (wxFont *) NULL;
 748     if (!headerFont)
 749     {
 750         headerFont = wxTheFontList->FindOrCreateFont(16, wxSWISS, wxNORMAL, wxBOLD);
 751     }
 752     dc->SetFont(headerFont);
 753 #endif
 754
 755     int pageWidthMM, pageHeightMM;
 756
 757     printout->GetPageSizeMM(&pageWidthMM, &pageHeightMM);
 758     wxUnusedVar(pageHeightMM);
 759
 760     int leftMargin = 10;
 761     int topMargin = 10;
 762     int rightMargin = 10;
 763
 764     float leftMarginLogical = (float)(mmToLogical*leftMargin);
 765     float topMarginLogical = (float)(mmToLogical*topMargin);
 766     float rightMarginLogical = (float)(mmToLogical*(pageWidthMM - rightMargin));
 767
 768     wxCoord xExtent, yExtent;
 769     dc->GetTextExtent(text, &xExtent, &yExtent);
 770
 771     float xPos = (float)(((((pageWidthMM - leftMargin - rightMargin)/2.0)+leftMargin)*mmToLogical) - (xExtent/2.0));
 772     dc->DrawText(text, (long)xPos, (long)topMarginLogical);
 773
 774     dc->SetPen(* wxBLACK_PEN);
 775     dc->DrawLine( (long)leftMarginLogical, (long)(topMarginLogical+yExtent),
 776                   (long)rightMarginLogical, (long)topMarginLogical+yExtent );
 777
 778     return true;
 779 }