samples/printing/printing.cpp

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