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wxWidgets/samples/printing/printing.cpp
Vadim Zeitlin 21a7ff2aa3 Use wxScopedPtr instead of explicit delete in printing sample 
No real changes, just make the code a bit safer.
2019-02-03 22:45:46 +01:00

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/////////////////////////////////////////////////////////////////////////////
// Name: samples/printing.cpp
// Purpose: Printing demo for wxWidgets
// Author: Julian Smart
// Modified by: Francesco Montorsi
// Created: 1995
// Copyright: (c) Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/wx.h"
#include "wx/log.h"
#endif
#if !wxUSE_PRINTING_ARCHITECTURE
#error "You must set wxUSE_PRINTING_ARCHITECTURE to 1 in setup.h, and recompile the library."
#endif
#include <ctype.h>
#include "wx/metafile.h"
#include "wx/print.h"
#include "wx/printdlg.h"
#include "wx/image.h"
#include "wx/accel.h"
#if wxUSE_POSTSCRIPT
#include "wx/generic/printps.h"
#include "wx/generic/prntdlgg.h"
#endif
#if wxUSE_GRAPHICS_CONTEXT
#include "wx/graphics.h"
#include "wx/scopedptr.h"
#endif
#ifdef __WXMAC__
#include "wx/osx/printdlg.h"
#endif
#include "printing.h"
#ifndef wxHAS_IMAGES_IN_RESOURCES
#include "../sample.xpm"
#endif
// Global print data, to remember settings during the session
wxPrintData *g_printData = NULL;
// Global page setup data
wxPageSetupDialogData* g_pageSetupData = NULL;
// ----------------------------------------------------------------------------
// MyApp
// ----------------------------------------------------------------------------
wxIMPLEMENT_APP(MyApp);
bool MyApp::OnInit(void)
{
if ( !wxApp::OnInit() )
return false;
wxInitAllImageHandlers();
// init global objects
// -------------------
g_printData = new wxPrintData;
// You could set an initial paper size here
#if 0
g_printData->SetPaperId(wxPAPER_LETTER); // for Americans
g_printData->SetPaperId(wxPAPER_A4); // for everyone else
#endif
g_pageSetupData = new wxPageSetupDialogData;
// copy over initial paper size from print record
(*g_pageSetupData) = *g_printData;
// Set some initial page margins in mm.
g_pageSetupData->SetMarginTopLeft(wxPoint(15, 15));
g_pageSetupData->SetMarginBottomRight(wxPoint(15, 15));
// init local GUI objects
// ----------------------
#if 0
wxImage image( "test.jpg" );
image.SetAlpha();
int i,j;
for (i = 0; i < image.GetWidth(); i++)
for (j = 0; j < image.GetHeight(); j++)
image.SetAlpha( i, j, 50 );
m_bitmap = image;
#endif
m_angle = 30;
m_testFont = wxFontInfo(10).Family(wxFONTFAMILY_SWISS);
// Create the main frame window
// ----------------------------
MyFrame* frame = new MyFrame((wxFrame *) NULL, "wxWidgets Printing Demo",
wxPoint(0, 0), wxSize(400, 400));
frame->Centre(wxBOTH);
frame->Show();
return true;
}
int MyApp::OnExit()
{
delete g_printData;
delete g_pageSetupData;
return wxApp::OnExit();
}
void MyApp::Draw(wxDC&dc)
{
// This routine just draws a bunch of random stuff on the screen so that we
// can check that different types of object are being drawn consistently
// between the screen image, the print preview image (at various zoom
// levels), and the printed page.
dc.SetBackground(*wxWHITE_BRUSH);
// dc.Clear();
dc.SetFont(m_testFont);
// dc.SetBackgroundMode(wxBRUSHSTYLE_TRANSPARENT);
dc.SetPen(*wxBLACK_PEN);
dc.SetBrush(*wxLIGHT_GREY_BRUSH);
dc.DrawRectangle(0, 0, 230, 350);
dc.DrawLine(0, 0, 229, 349);
dc.DrawLine(229, 0, 0, 349);
dc.SetBrush(*wxTRANSPARENT_BRUSH);
dc.SetBrush(*wxCYAN_BRUSH);
dc.SetPen(*wxRED_PEN);
dc.DrawRoundedRectangle(0, 20, 200, 80, 20);
dc.DrawText( "Rectangle 200 by 80", 40, 40);
dc.SetPen( wxPen(*wxBLACK, 0, wxPENSTYLE_DOT_DASH) );
dc.DrawEllipse(50, 140, 100, 50);
dc.SetPen(*wxRED_PEN);
dc.DrawText( "Test message: this is in 10 point text", 10, 180);
dc.DrawRotatedText( "This\nis\na multi-line\ntext", 170, 100, -m_angle/1.5);
#if wxUSE_UNICODE
const char *test = "Hebrew שלום -- Japanese (日本語)";
wxString tmp = wxConvUTF8.cMB2WC( test );
dc.DrawText( tmp, 10, 200 );
#endif
wxPoint points[5];
points[0].x = 0;
points[0].y = 0;
points[1].x = 20;
points[1].y = 0;
points[2].x = 20;
points[2].y = 20;
points[3].x = 10;
points[3].y = 20;
points[4].x = 10;
points[4].y = -20;
dc.DrawPolygon( 5, points, 20, 250, wxODDEVEN_RULE );
dc.DrawPolygon( 5, points, 50, 250, wxWINDING_RULE );
dc.DrawArc( 20, 330, 40, 300, 20, 300 );
{
wxDCBrushChanger changeBrush(dc, *wxTRANSPARENT_BRUSH);
dc.DrawArc( 60, 330, 80, 300, 60, 300 );
}
dc.DrawEllipticArc( 80, 250, 60, 30, 0.0, 270.0 );
points[0].x = 150;
points[0].y = 250;
points[1].x = 180;
points[1].y = 250;
points[2].x = 180;
points[2].y = 220;
points[3].x = 200;
points[3].y = 220;
dc.DrawSpline( 4, points );
wxString str;
int i = 0;
str.Printf( "---- Text at angle %d ----", i );
dc.DrawRotatedText( str, 100, 300, i );
i = m_angle;
str.Printf( "---- Text at angle %d ----", i );
dc.DrawRotatedText( str, 100, 300, i );
wxIcon my_icon = wxICON(sample);
dc.DrawIcon( my_icon, 100, 100);
if (m_bitmap.IsOk())
dc.DrawBitmap( m_bitmap, 10, 10 );
#if wxUSE_GRAPHICS_CONTEXT
wxScopedPtr<wxGraphicsContext> gc(wxGraphicsContext::CreateFromUnknownDC(dc));
if (gc)
{
// make a path that contains a circle and some lines, centered at 100,100
gc->SetPen( *wxRED_PEN );
wxGraphicsPath path = gc->CreatePath();
path.AddCircle( 50.0, 50.0, 50.0 );
path.MoveToPoint(0.0, 50.0);
path.AddLineToPoint(100.0, 50.0);
path.MoveToPoint(50.0, 0.0);
path.AddLineToPoint(50.0, 100.0 );
path.CloseSubpath();
path.AddRectangle(25.0, 25.0, 50.0, 50.0);
gc->StrokePath(path);
// draw some text
wxString text("Text by wxGraphicsContext");
gc->SetFont( m_testFont, *wxBLACK );
gc->DrawText(text, 25.0, 60.0);
// draw rectangle around the text
double w, h;
gc->GetTextExtent(text, &w, &h);
gc->SetPen( *wxBLACK_PEN );
gc->DrawRectangle(25.0, 60.0, w, h);
}
#endif
}
// ----------------------------------------------------------------------------
// MyFrame
// ----------------------------------------------------------------------------
wxBEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_MENU(wxID_EXIT, MyFrame::OnExit)
EVT_MENU(wxID_PRINT, MyFrame::OnPrint)
EVT_MENU(wxID_PREVIEW, MyFrame::OnPrintPreview)
EVT_MENU(WXPRINT_PAGE_SETUP, MyFrame::OnPageSetup)
EVT_MENU(wxID_ABOUT, MyFrame::OnPrintAbout)
#if wxUSE_POSTSCRIPT
EVT_MENU(WXPRINT_PRINT_PS, MyFrame::OnPrintPS)
EVT_MENU(WXPRINT_PREVIEW_PS, MyFrame::OnPrintPreviewPS)
EVT_MENU(WXPRINT_PAGE_SETUP_PS, MyFrame::OnPageSetupPS)
#endif
#ifdef __WXMAC__
EVT_MENU(WXPRINT_PAGE_MARGINS, MyFrame::OnPageMargins)
#endif
EVT_MENU(WXPRINT_ANGLEUP, MyFrame::OnAngleUp)
EVT_MENU(WXPRINT_ANGLEDOWN, MyFrame::OnAngleDown)
EVT_MENU_RANGE(WXPRINT_FRAME_MODAL_APP,
WXPRINT_FRAME_MODAL_NON,
MyFrame::OnPreviewFrameModalityKind)
wxEND_EVENT_TABLE()
MyFrame::MyFrame(wxFrame *frame, const wxString&title, const wxPoint&pos, const wxSize&size)
: wxFrame(frame, wxID_ANY, title, pos, size)
{
m_canvas = NULL;
m_previewModality = wxPreviewFrame_AppModal;
#if wxUSE_STATUSBAR
// Give us a status line
CreateStatusBar(2);
SetStatusText("Printing demo");
#endif // wxUSE_STATUSBAR
// Load icon and bitmap
SetIcon( wxICON( sample) );
// Make a menubar
wxMenu *file_menu = new wxMenu;
file_menu->Append(wxID_PRINT, "&Print...", "Print");
file_menu->Append(WXPRINT_PAGE_SETUP, "Page Set&up...", "Page setup");
#ifdef __WXMAC__
file_menu->Append(WXPRINT_PAGE_MARGINS, "Page Margins...", "Page margins");
#endif
file_menu->Append(wxID_PREVIEW, "Print Pre&view", "Preview");
wxMenu * const menuModalKind = new wxMenu;
menuModalKind->AppendRadioItem(WXPRINT_FRAME_MODAL_APP, "&App modal");
menuModalKind->AppendRadioItem(WXPRINT_FRAME_MODAL_WIN, "&Window modal");
menuModalKind->AppendRadioItem(WXPRINT_FRAME_MODAL_NON, "&Not modal");
file_menu->AppendSubMenu(menuModalKind, "Preview frame &modal kind");
#if wxUSE_ACCEL
// Accelerators
wxAcceleratorEntry entries[1];
entries[0].Set(wxACCEL_CTRL, (int) 'V', wxID_PREVIEW);
wxAcceleratorTable accel(1, entries);
SetAcceleratorTable(accel);
#endif
#if wxUSE_POSTSCRIPT
file_menu->AppendSeparator();
file_menu->Append(WXPRINT_PRINT_PS, "Print PostScript...", "Print (PostScript)");
file_menu->Append(WXPRINT_PAGE_SETUP_PS, "Page Setup PostScript...", "Page setup (PostScript)");
file_menu->Append(WXPRINT_PREVIEW_PS, "Print Preview PostScript", "Preview (PostScript)");
#endif
file_menu->AppendSeparator();
file_menu->Append(WXPRINT_ANGLEUP, "Angle up\tAlt-U", "Raise rotated text angle");
file_menu->Append(WXPRINT_ANGLEDOWN, "Angle down\tAlt-D", "Lower rotated text angle");
file_menu->AppendSeparator();
file_menu->Append(wxID_EXIT, "E&xit", "Exit program");
wxMenu *help_menu = new wxMenu;
help_menu->Append(wxID_ABOUT, "&About", "About this demo");
wxMenuBar *menu_bar = new wxMenuBar;
menu_bar->Append(file_menu, "&File");
menu_bar->Append(help_menu, "&Help");
// Associate the menu bar with the frame
SetMenuBar(menu_bar);
// create the canvas
// -----------------
m_canvas = new MyCanvas(this, wxPoint(0, 0), wxSize(100, 100),
wxRETAINED|wxHSCROLL|wxVSCROLL);
// Give it scrollbars: the virtual canvas is 20 * 50 = 1000 pixels in each direction
m_canvas->SetScrollbars(20, 20, 50, 50);
}
void MyFrame::OnExit(wxCommandEvent& WXUNUSED(event))
{
Close(true /*force closing*/);
}
void MyFrame::OnPrint(wxCommandEvent& WXUNUSED(event))
{
wxPrintDialogData printDialogData(* g_printData);
wxPrinter printer(&printDialogData);
MyPrintout printout(this, "My printout");
if (!printer.Print(this, &printout, true /*prompt*/))
{
if (wxPrinter::GetLastError() == wxPRINTER_ERROR)
{
wxLogError("There was a problem printing. Perhaps your current printer is not set correctly?");
}
else
{
wxLogMessage("You canceled printing");
}
}
else
{
(*g_printData) = printer.GetPrintDialogData().GetPrintData();
}
}
void MyFrame::OnPrintPreview(wxCommandEvent& WXUNUSED(event))
{
// Pass two printout objects: for preview, and possible printing.
wxPrintDialogData printDialogData(* g_printData);
wxPrintPreview *preview =
new wxPrintPreview(new MyPrintout(this), new MyPrintout(this), &printDialogData);
if (!preview->IsOk())
{
delete preview;
wxLogError("There was a problem previewing.\nPerhaps your current printer is not set correctly?");
return;
}
wxPreviewFrame *frame =
new wxPreviewFrame(preview, this, "Demo Print Preview", wxPoint(100, 100), wxSize(600, 650));
frame->Centre(wxBOTH);
frame->InitializeWithModality(m_previewModality);
frame->Show();
}
void MyFrame::OnPageSetup(wxCommandEvent& WXUNUSED(event))
{
(*g_pageSetupData) = *g_printData;
wxPageSetupDialog pageSetupDialog(this, g_pageSetupData);
pageSetupDialog.ShowModal();
(*g_printData) = pageSetupDialog.GetPageSetupDialogData().GetPrintData();
(*g_pageSetupData) = pageSetupDialog.GetPageSetupDialogData();
}
#if wxUSE_POSTSCRIPT
void MyFrame::OnPrintPS(wxCommandEvent& WXUNUSED(event))
{
wxPrintDialogData printDialogData(* g_printData);
wxPostScriptPrinter printer(&printDialogData);
MyPrintout printout(this, "My printout");
printer.Print(this, &printout, true/*prompt*/);
(*g_printData) = printer.GetPrintDialogData().GetPrintData();
}
void MyFrame::OnPrintPreviewPS(wxCommandEvent& WXUNUSED(event))
{
// Pass two printout objects: for preview, and possible printing.
wxPrintDialogData printDialogData(* g_printData);
wxPrintPreview *preview = new wxPrintPreview(new MyPrintout(this), new MyPrintout(this), &printDialogData);
wxPreviewFrame *frame =
new wxPreviewFrame(preview, this, "Demo Print Preview", wxPoint(100, 100), wxSize(600, 650));
frame->Centre(wxBOTH);
frame->Initialize();
frame->Show();
}
void MyFrame::OnPageSetupPS(wxCommandEvent& WXUNUSED(event))
{
(*g_pageSetupData) = * g_printData;
wxGenericPageSetupDialog pageSetupDialog(this, g_pageSetupData);
pageSetupDialog.ShowModal();
(*g_printData) = pageSetupDialog.GetPageSetupDialogData().GetPrintData();
(*g_pageSetupData) = pageSetupDialog.GetPageSetupDialogData();
}
#endif
#ifdef __WXMAC__
void MyFrame::OnPageMargins(wxCommandEvent& WXUNUSED(event))
{
(*g_pageSetupData) = *g_printData;
wxMacPageMarginsDialog pageMarginsDialog(this, g_pageSetupData);
pageMarginsDialog.ShowModal();
(*g_printData) = pageMarginsDialog.GetPageSetupDialogData().GetPrintData();
(*g_pageSetupData) = pageMarginsDialog.GetPageSetupDialogData();
}
#endif
void MyFrame::OnPrintAbout(wxCommandEvent& WXUNUSED(event))
{
(void)wxMessageBox("wxWidgets printing demo\nAuthor: Julian Smart",
"About wxWidgets printing demo", wxOK|wxCENTRE);
}
void MyFrame::OnAngleUp(wxCommandEvent& WXUNUSED(event))
{
wxGetApp().IncrementAngle();
m_canvas->Refresh();
}
void MyFrame::OnAngleDown(wxCommandEvent& WXUNUSED(event))
{
wxGetApp().DecrementAngle();
m_canvas->Refresh();
}
void MyFrame::OnPreviewFrameModalityKind(wxCommandEvent& event)
{
m_previewModality = static_cast<wxPreviewFrameModalityKind>(
wxPreviewFrame_AppModal +
(event.GetId() - WXPRINT_FRAME_MODAL_APP));
}
// ----------------------------------------------------------------------------
// MyCanvas
// ----------------------------------------------------------------------------
wxBEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
// EVT_PAINT(MyCanvas::OnPaint)
wxEND_EVENT_TABLE()
MyCanvas::MyCanvas(wxFrame *frame, const wxPoint&pos, const wxSize&size, long style)
: wxScrolledWindow(frame, wxID_ANY, pos, size, style)
{
SetBackgroundColour(*wxWHITE);
}
//void MyCanvas::OnPaint(wxPaintEvent& WXUNUSED(evt))
void MyCanvas::OnDraw(wxDC& dc)
{
//wxPaintDC dc(this);
wxGetApp().Draw(dc);
}
// ----------------------------------------------------------------------------
// MyPrintout
// ----------------------------------------------------------------------------
bool MyPrintout::OnPrintPage(int page)
{
wxDC *dc = GetDC();
if (dc)
{
if (page == 1)
DrawPageOne();
else if (page == 2)
DrawPageTwo();
// Draw page numbers at top left corner of printable area, sized so that
// screen size of text matches paper size.
MapScreenSizeToPage();
dc->DrawText(wxString::Format("PAGE %d", page), 0, 0);
return true;
}
else
return false;
}
bool MyPrintout::OnBeginDocument(int startPage, int endPage)
{
if (!wxPrintout::OnBeginDocument(startPage, endPage))
return false;
return true;
}
void MyPrintout::GetPageInfo(int *minPage, int *maxPage, int *selPageFrom, int *selPageTo)
{
*minPage = 1;
*maxPage = 2;
*selPageFrom = 1;
*selPageTo = 2;
}
bool MyPrintout::HasPage(int pageNum)
{
return (pageNum == 1 || pageNum == 2);
}
void MyPrintout::DrawPageOne()
{
// You might use THIS code if you were scaling graphics of known size to fit
// on the page. The commented-out code illustrates different ways of scaling
// the graphics.
// We know the graphic is 230x350. If we didn't know this, we'd need to
// calculate it.
wxCoord maxX = 230;
wxCoord maxY = 350;
// This sets the user scale and origin of the DC so that the image fits
// within the paper rectangle (but the edges could be cut off by printers
// that can't print to the edges of the paper -- which is most of them. Use
// this if your image already has its own margins.
// FitThisSizeToPaper(wxSize(maxX, maxY));
// wxRect fitRect = GetLogicalPaperRect();
// This sets the user scale and origin of the DC so that the image fits
// within the page rectangle, which is the printable area on Mac and MSW
// and is the entire page on other platforms.
// FitThisSizeToPage(wxSize(maxX, maxY));
// wxRect fitRect = GetLogicalPageRect();
// This sets the user scale and origin of the DC so that the image fits
// within the page margins as specified by g_PageSetupData, which you can
// change (on some platforms, at least) in the Page Setup dialog. Note that
// on Mac, the native Page Setup dialog doesn't let you change the margins
// of a wxPageSetupDialogData object, so you'll have to write your own dialog or
// use the Mac-only wxMacPageMarginsDialog, as we do in this program.
FitThisSizeToPageMargins(wxSize(maxX, maxY), *g_pageSetupData);
wxRect fitRect = GetLogicalPageMarginsRect(*g_pageSetupData);
// This sets the user scale and origin of the DC so that the image appears
// on the paper at the same size that it appears on screen (i.e., 10-point
// type on screen is 10-point on the printed page) and is positioned in the
// top left corner of the page rectangle (just as the screen image appears
// in the top left corner of the window).
// MapScreenSizeToPage();
// wxRect fitRect = GetLogicalPageRect();
// You could also map the screen image to the entire paper at the same size
// as it appears on screen.
// MapScreenSizeToPaper();
// wxRect fitRect = GetLogicalPaperRect();
// You might also wish to do you own scaling in order to draw objects at
// full native device resolution. In this case, you should do the following.
// Note that you can use the GetLogicalXXXRect() commands to obtain the
// appropriate rect to scale to.
// MapScreenSizeToDevice();
// wxRect fitRect = GetLogicalPageRect();
// Each of the preceding Fit or Map routines positions the origin so that
// the drawn image is positioned at the top left corner of the reference
// rectangle. You can easily center or right- or bottom-justify the image as
// follows.
// This offsets the image so that it is centered within the reference
// rectangle defined above.
wxCoord xoff = (fitRect.width - maxX) / 2;
wxCoord yoff = (fitRect.height - maxY) / 2;
OffsetLogicalOrigin(xoff, yoff);
// This offsets the image so that it is positioned at the bottom right of
// the reference rectangle defined above.
// wxCoord xoff = (fitRect.width - maxX);
// wxCoord yoff = (fitRect.height - maxY);
// OffsetLogicalOrigin(xoff, yoff);
wxGetApp().Draw(*GetDC());
}
void MyPrintout::DrawPageTwo()
{
// You might use THIS code to set the printer DC to ROUGHLY reflect
// the screen text size. This page also draws lines of actual length
// 5cm on the page.
// Compare this to DrawPageOne(), which uses the really convenient routines
// from wxPrintout to fit the screen image onto the printed page. This page
// illustrates how to do all the scaling calculations yourself, if you're so
// inclined.
wxDC *dc = GetDC();
// Get the logical pixels per inch of screen and printer
int ppiScreenX, ppiScreenY;
GetPPIScreen(&ppiScreenX, &ppiScreenY);
int ppiPrinterX, ppiPrinterY;
GetPPIPrinter(&ppiPrinterX, &ppiPrinterY);
// This scales the DC so that the printout roughly represents the screen
// scaling. The text point size _should_ be the right size but in fact is
// too small for some reason. This is a detail that will need to be
// addressed at some point but can be fudged for the moment.
float scale = (float)((float)ppiPrinterX/(float)ppiScreenX);
// Now we have to check in case our real page size is reduced (e.g. because
// we're drawing to a print preview memory DC)
int pageWidth, pageHeight;
int w, h;
dc->GetSize(&w, &h);
GetPageSizePixels(&pageWidth, &pageHeight);
// If printer pageWidth == current DC width, then this doesn't change. But w
// might be the preview bitmap width, so scale down.
float overallScale = scale * (float)(w/(float)pageWidth);
dc->SetUserScale(overallScale, overallScale);
// Calculate conversion factor for converting millimetres into logical
// units. There are approx. 25.4 mm to the inch. There are ppi device units
// to the inch. Therefore 1 mm corresponds to ppi/25.4 device units. We also
// divide by the screen-to-printer scaling factor, because we need to
// unscale to pass logical units to DrawLine.
// Draw 50 mm by 50 mm L shape
float logUnitsFactor = (float)(ppiPrinterX/(scale*25.4));
float logUnits = (float)(50*logUnitsFactor);
dc->SetPen(* wxBLACK_PEN);
dc->DrawLine(50, 250, (long)(50.0 + logUnits), 250);
dc->DrawLine(50, 250, 50, (long)(250.0 + logUnits));
dc->SetBackgroundMode(wxBRUSHSTYLE_TRANSPARENT);
dc->SetBrush(*wxTRANSPARENT_BRUSH);
{ // GetTextExtent demo:
wxString words[7] = { "This ", "is ", "GetTextExtent ",
"testing ", "string. ", "Enjoy ", "it!" };
long x = 200, y= 250;
dc->SetFont(wxFontInfo(15).Family(wxFONTFAMILY_SWISS));
for (int i = 0; i < 7; i++)
{
wxCoord wordWidth, wordHeight;
wxString word = words[i];
word.Remove( word.Len()-1, 1 );
dc->GetTextExtent(word, &wordWidth, &wordHeight);
dc->DrawRectangle(x, y, wordWidth, wordHeight);
dc->GetTextExtent(words[i], &wordWidth, &wordHeight);
dc->DrawText(words[i], x, y);
x += wordWidth;
}
}
dc->SetFont(wxGetApp().GetTestFont());
dc->DrawText("Some test text", 200, 300 );
// TESTING
int leftMargin = 20;
int rightMargin = 20;
int topMargin = 20;
int bottomMargin = 20;
int pageWidthMM, pageHeightMM;
GetPageSizeMM(&pageWidthMM, &pageHeightMM);
float leftMarginLogical = (float)(logUnitsFactor*leftMargin);
float topMarginLogical = (float)(logUnitsFactor*topMargin);
float bottomMarginLogical = (float)(logUnitsFactor*(pageHeightMM - bottomMargin));
float rightMarginLogical = (float)(logUnitsFactor*(pageWidthMM - rightMargin));
dc->SetPen(* wxRED_PEN);
dc->DrawLine( (long)leftMarginLogical, (long)topMarginLogical,
(long)rightMarginLogical, (long)topMarginLogical);
dc->DrawLine( (long)leftMarginLogical, (long)bottomMarginLogical,
(long)rightMarginLogical, (long)bottomMarginLogical);
WritePageHeader(this, dc, "A header", logUnitsFactor);
}
// Writes a header on a page. Margin units are in millimetres.
bool MyPrintout::WritePageHeader(wxPrintout *printout, wxDC *dc, const wxString&text, float mmToLogical)
{
int pageWidthMM, pageHeightMM;
printout->GetPageSizeMM(&pageWidthMM, &pageHeightMM);
wxUnusedVar(pageHeightMM);
int leftMargin = 10;
int topMargin = 10;
int rightMargin = 10;
float leftMarginLogical = (float)(mmToLogical*leftMargin);
float topMarginLogical = (float)(mmToLogical*topMargin);
float rightMarginLogical = (float)(mmToLogical*(pageWidthMM - rightMargin));
wxCoord xExtent, yExtent;
dc->GetTextExtent(text, &xExtent, &yExtent);
float xPos = (float)(((((pageWidthMM - leftMargin - rightMargin)/2.0)+leftMargin)*mmToLogical) - (xExtent/2.0));
dc->DrawText(text, (long)xPos, (long)topMarginLogical);
dc->SetPen(* wxBLACK_PEN);
dc->DrawLine( (long)leftMarginLogical, (long)(topMarginLogical+yExtent),
(long)rightMarginLogical, (long)topMarginLogical+yExtent );
return true;
}
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