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