source: git/src/printwx.cc @ 1fce809

/* printwx.cc */
/* wxWidgets specific parts of Survex wxWidgets printing code */
/* Copyright (C) 1993-2003,2004,2005,2006,2010,2011,2012,2013,2014 Olly Betts
 * Copyright (C) 2001,2004 Philip Underwood
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <wx/confbase.h>
#include <wx/filename.h>
#include <wx/print.h>
#include <wx/printdlg.h>
#include <wx/spinctrl.h>
#include <wx/radiobox.h>
#include <wx/statbox.h>
#include <wx/valgen.h>

#include <vector>

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <ctype.h>
#include <float.h>
#include <limits.h>

#include "debug.h" /* for BUG and SVX_ASSERT */
#include "export.h"
#include "filelist.h"
#include "filename.h"
#include "ini.h"
#include "message.h"
#include "useful.h"

#include "aven.h"
#include "avenprcore.h"
#include "mainfrm.h"
#include "printwx.h"

using namespace std;

enum {
        svx_EXPORT = 1200,
        svx_FORMAT,
        svx_SCALE,
        svx_BEARING,
        svx_TILT,
        svx_LEGS,
        svx_STATIONS,
        svx_NAMES,
        svx_XSECT,
        svx_WALLS,
        svx_PASSAGES,
        svx_BORDERS,
        svx_BLANKS,
        svx_LEGEND,
        svx_SURFACE,
        svx_PLAN,
        svx_ELEV,
        svx_ENTS,
        svx_FIXES,
        svx_EXPORTS,
        svx_PROJ_LABEL,
        svx_PROJ,
        svx_GRID,
        svx_TEXT_HEIGHT,
        svx_MARKER_SIZE,
        svx_CENTRED,
        svx_FULLCOORDS
};

class BitValidator : public wxValidator {
    // Disallow assignment.
    BitValidator & operator=(const BitValidator&);

  protected:
    int * val;

    int mask;

  public:
    BitValidator(int * val_, int mask_)
        : val(val_), mask(mask_) { }

    BitValidator(const BitValidator &o) : wxValidator() {
        Copy(o);
    }

    ~BitValidator() { }

    wxObject *Clone() const { return new BitValidator(val, mask); }

    bool Copy(const BitValidator& o) {
        wxValidator::Copy(o);
        val = o.val;
        mask = o.mask;
        return true;
    }

    bool Validate(wxWindow *) { return true; }

    bool TransferToWindow() {
        if (!m_validatorWindow->IsKindOf(CLASSINFO(wxCheckBox)))
            return false;
        ((wxCheckBox*)m_validatorWindow)->SetValue(*val & mask);
        return true;
    }

    bool TransferFromWindow() {
        if (!m_validatorWindow->IsKindOf(CLASSINFO(wxCheckBox)))
            return false;
        if (((wxCheckBox*)m_validatorWindow)->IsChecked())
            *val |= mask;
        else
            *val &= ~mask;
        return true;
    }
};

class svxPrintout : public wxPrintout {
    MainFrm *mainfrm;
    layout *m_layout;
    wxPageSetupDialogData* m_data;
    wxDC* pdc;
    // Currently unused, but "skip blank pages" would use it.
    static const int cur_pass = 0;

    wxPen *pen_frame, *pen_cross, *pen_surface_leg, *pen_leg;
    wxColour colour_text, colour_labels, colour_frame, colour_leg;
    wxColour colour_cross,colour_surface_leg;

    long x_t, y_t;
    double font_scaling_x, font_scaling_y;
    wxFont * current_font;

    int check_intersection(long x_p, long y_p);
    void draw_info_box();
    void draw_scale_bar(double x, double y, double MaxLength);
    int next_page(int *pstate, char **q, int pageLim);
    void drawticks(border clip, int tsize, int x, int y);

    void MOVEMM(double X, double Y) {
        MoveTo((long)(X * m_layout->scX), (long)(Y * m_layout->scY));
    }
    void DRAWMM(double X, double Y) {
        DrawTo((long)(X * m_layout->scX), (long)(Y * m_layout->scY));
    }
    void MoveTo(long x, long y);
    void DrawTo(long x, long y);
    void DrawCross(long x, long y);
    void SetFont(int fontcode);
    void SetColour(int colourcode);
    void WriteString(const wxString & s);
    void DrawEllipse(long x, long y, long r, long R);
    void SolidRectangle(long x, long y, long w, long h);
    int Pre();
    void NewPage(int pg, int pagesX, int pagesY);
    void PlotLR(const vector<XSect> & centreline);
    void PlotUD(const vector<XSect> & centreline);
    char * Init(FILE **fh_list, bool fCalibrate);
  public:
    svxPrintout(MainFrm *mainfrm, layout *l, wxPageSetupDialogData *data, const wxString & title);
    bool OnPrintPage(int pageNum);
    void GetPageInfo(int *minPage, int *maxPage,
                     int *pageFrom, int *pageTo);
    bool HasPage(int pageNum);
    void OnBeginPrinting();
    void OnEndPrinting();
};

BEGIN_EVENT_TABLE(svxPrintDlg, wxDialog)
    EVT_CHOICE(svx_FORMAT, svxPrintDlg::OnChange)
    EVT_TEXT(svx_SCALE, svxPrintDlg::OnChange)
    EVT_COMBOBOX(svx_SCALE, svxPrintDlg::OnChange)
    EVT_SPINCTRL(svx_BEARING, svxPrintDlg::OnChangeSpin)
    EVT_SPINCTRL(svx_TILT, svxPrintDlg::OnChangeSpin)
    EVT_BUTTON(wxID_PRINT, svxPrintDlg::OnPrint)
    EVT_BUTTON(svx_EXPORT, svxPrintDlg::OnExport)
    EVT_BUTTON(wxID_CANCEL, svxPrintDlg::OnCancel)
#ifdef AVEN_PRINT_PREVIEW
    EVT_BUTTON(wxID_PREVIEW, svxPrintDlg::OnPreview)
#endif
    EVT_BUTTON(svx_PLAN, svxPrintDlg::OnPlan)
    EVT_BUTTON(svx_ELEV, svxPrintDlg::OnElevation)
    EVT_UPDATE_UI(svx_PLAN, svxPrintDlg::OnPlanUpdate)
    EVT_UPDATE_UI(svx_ELEV, svxPrintDlg::OnElevationUpdate)
    EVT_CHECKBOX(svx_LEGS, svxPrintDlg::OnChange)
    EVT_CHECKBOX(svx_STATIONS, svxPrintDlg::OnChange)
    EVT_CHECKBOX(svx_NAMES, svxPrintDlg::OnChange)
    EVT_CHECKBOX(svx_SURFACE, svxPrintDlg::OnChange)
    EVT_CHECKBOX(svx_ENTS, svxPrintDlg::OnChange)
    EVT_CHECKBOX(svx_FIXES, svxPrintDlg::OnChange)
    EVT_CHECKBOX(svx_EXPORTS, svxPrintDlg::OnChange)
END_EVENT_TABLE()

static wxString scales[] = {
    wxT(""),
    wxT("25"),
    wxT("50"),
    wxT("100"),
    wxT("250"),
    wxT("500"),
    wxT("1000"),
    wxT("2500"),
    wxT("5000"),
    wxT("10000"),
    wxT("25000"),
    wxT("50000"),
    wxT("100000")
};

static wxString formats[] = {
    wxT("DXF"),
    wxT("EPS"),
    wxT("GPX"),
    wxT("HPGL"),
    wxT("KML"),
    wxT("Plot"),
    wxT("Skencil"),
    wxT("SVG")
};

#if 0
static wxString projs[] = {
    /* CUCC Austria: */
    wxT("+proj=tmerc +lat_0=0 +lon_0=13d20 +k=1 +x_0=0 +y_0=-5200000 +ellps=bessel +towgs84=577.326,90.129,463.919,5.137,1.474,5.297,2.4232"),
    /* British grid SD (Yorkshire): */
    wxT("+proj=tmerc +lat_0=49d +lon_0=-2d +k=0.999601 +x_0=100000 +y_0=-500000 +ellps=airy +towgs84=375,-111,431,0,0,0,0"),
    /* British full grid reference: */
    wxT("+proj=tmerc +lat_0=49d +lon_0=-2d +k=0.999601 +x_0=400000 +y_0=-100000 +ellps=airy +towgs84=375,-111,431,0,0,0,0")
};
#endif

static unsigned format_info[] = {
    LABELS|LEGS|SURF|STNS|PASG|XSECT|WALLS|MARKER_SIZE|TEXT_HEIGHT|GRID|FULL_COORDS,
    LABELS|LEGS|SURF|STNS,
    LABELS|LEGS|SURF|ENTS|FIXES|EXPORTS|PROJ|EXPORT_3D,
    LABELS|LEGS|SURF|STNS|CENTRED,
    LABELS|ENTS|FIXES|EXPORTS|PROJ|EXPORT_3D,
    LABELS|LEGS|SURF,
    LABELS|LEGS|SURF|STNS|MARKER_SIZE|GRID|SCALE,
    LABELS|LEGS|SURF|STNS|PASG|XSECT|WALLS|MARKER_SIZE|TEXT_HEIGHT|SCALE
};

static const char * extension[] = {
    ".dxf",
    ".eps",
    ".gpx",
    ".hpgl",
    ".kml",
    ".plt",
    ".sk",
    ".svg"
};

static int msg_filetype[] = {
    /*DXF files*/411,
    /*EPS files*/412,
    /*GPX files*/413,
    /*HPGL for plotters*/414,
    /*KML files*/444,
    /*Compass PLT for use with Carto*/415,
    /*Skencil files*/416,
    /*SVG files*/417
};

// there are three jobs to do here...
// User <-> wx - this should possibly be done in a separate file
svxPrintDlg::svxPrintDlg(MainFrm* mainfrm_, const wxString & filename,
                         const wxString & title, const wxString & cs_proj,
                         const wxString & datestamp, time_t datestamp_numeric,
                         double angle, double tilt_angle,
                         bool labels, bool crosses, bool legs, bool surf,
                         bool tubes, bool ents, bool fixes, bool exports,
                         bool printing, bool close_after_)
        : wxDialog(mainfrm_, -1, wxString(printing ?
                                          /* TRANSLATORS: Title of the print
                                           * dialog */
                                          wmsg(/*Print*/399) :
                                          /* TRANSLATORS: Title of the export
                                           * dialog */
                                          wmsg(/*Export*/383))),
          m_layout(printing ? wxGetApp().GetPageSetupDialogData() : NULL),
          m_File(filename), mainfrm(mainfrm_), close_after(close_after_)
{
    m_scale = NULL;
    m_printSize = NULL;
    m_bearing = NULL;
    m_tilt = NULL;
    m_format = NULL;
    int show_mask = 0;
    if (labels)
        show_mask |= LABELS;
    if (crosses)
        show_mask |= STNS;
    if (legs)
        show_mask |= LEGS;
    if (surf)
        show_mask |= SURF;
    if (tubes)
        show_mask |= XSECT|WALLS|PASG;
    if (ents)
        show_mask |= ENTS;
    if (fixes)
        show_mask |= FIXES;
    if (exports)
        show_mask |= EXPORTS;
    m_layout.show_mask = show_mask;
    m_layout.datestamp = datestamp;
    m_layout.datestamp_numeric = datestamp_numeric;
    m_layout.rot = int(angle);
    m_layout.title = title;
    m_layout.cs_proj = cs_proj;
    if (mainfrm->IsExtendedElevation()) {
        m_layout.view = layout::EXTELEV;
        if (m_layout.rot != 0 && m_layout.rot != 180) m_layout.rot = 0;
        m_layout.tilt = 0;
    } else {
        // FIXME rot and tilt shouldn't be integers.
        m_layout.tilt = int(tilt_angle);
        if (m_layout.tilt == -90) {
            m_layout.view = layout::PLAN;
        } else if (m_layout.tilt == 0) {
            m_layout.view = layout::ELEV;
        } else {
            m_layout.view = layout::TILT;
        }
    }

    /* setup our print dialog*/
    wxBoxSizer* v1 = new wxBoxSizer(wxVERTICAL);
    wxBoxSizer* h1 = new wxBoxSizer(wxHORIZONTAL); // holds controls
    /* TRANSLATORS: Used as a label for the surrounding box for the "Bearing"
     * and "Tilt angle" fields, and the "Plan view" and "Elevation" buttons in
     * the "what to print/export" dialog. */
    m_viewbox = new wxStaticBoxSizer(new wxStaticBox(this, -1, wmsg(/*View*/283)), wxVERTICAL);
    /* TRANSLATORS: Used as a label for the surrounding box for the "survey
     * legs" "stations" "names" etc checkboxes in the "what to print" dialog.
     * "Elements" isn’t a good name for this but nothing better has yet come to
     * mind! */
    wxBoxSizer* v3 = new wxStaticBoxSizer(new wxStaticBox(this, -1, wmsg(/*Elements*/256)), wxVERTICAL);
    wxBoxSizer* h2 = new wxBoxSizer(wxHORIZONTAL);
    wxBoxSizer* h3 = new wxBoxSizer(wxHORIZONTAL); // holds buttons

    if (!printing) {
        wxStaticText* label;
        label = new wxStaticText(this, -1, wxString(wmsg(/*Export format*/410)));
        const size_t n_formats = sizeof(formats) / sizeof(formats[0]);
        m_format = new wxChoice(this, svx_FORMAT,
                                wxDefaultPosition, wxDefaultSize,
                                n_formats, formats);
        unsigned current_format = 0;
        wxConfigBase * cfg = wxConfigBase::Get();
        wxString s;
        if (cfg->Read(wxT("export_format"), &s, wxString())) {
            for (unsigned i = 0; i != n_formats; ++i) {
                if (s == formats[i]) {
                    current_format = i;
                    break;
                }
            }
        }
        m_format->SetSelection(current_format);
        wxBoxSizer* formatbox = new wxBoxSizer(wxHORIZONTAL);
        formatbox->Add(label, 0, wxALIGN_CENTER_VERTICAL|wxALL, 5);
        formatbox->Add(m_format, 0, wxALIGN_CENTER_VERTICAL|wxALL, 5);

        v1->Add(formatbox, 0, wxALIGN_LEFT|wxALL, 0);
    }

    wxStaticText* label;
    label = new wxStaticText(this, -1, wxString(wmsg(/*Scale*/154)) + wxT(" 1:"));
    if (scales[0].empty()) {
        if (printing) {
            /* TRANSLATORS: used in the scale drop down selector in the print
             * dialog the implicit meaning is "choose a suitable scale to fit
             * the plot on a single page", but we need something shorter */
            scales[0].assign(wmsg(/*One page*/258));
        } else {
            scales[0].assign(wxT("1000"));
        }
    }
    m_scale = new wxComboBox(this, svx_SCALE, scales[0], wxDefaultPosition,
                             wxDefaultSize, sizeof(scales) / sizeof(scales[0]),
                             scales);
    m_scalebox = new wxBoxSizer(wxHORIZONTAL);
    m_scalebox->Add(label, 0, wxALIGN_CENTER_VERTICAL|wxALL, 5);
    m_scalebox->Add(m_scale, 0, wxALIGN_CENTER_VERTICAL|wxALL, 5);

    m_viewbox->Add(m_scalebox, 0, wxALIGN_LEFT|wxALL, 0);

    if (printing) {
        // Make the dummy string wider than any sane value and use that to
        // fix the width of the control so the sizers allow space for bigger
        // page layouts.
        m_printSize = new wxStaticText(this, -1, wxString::Format(wmsg(/*%d pages (%dx%d)*/257), 9604, 98, 98));
        m_viewbox->Add(m_printSize, 0, wxALIGN_LEFT|wxALL, 5);
    }

    /* FIXME:
     * svx_GRID, // double - spacing, default: 100m
     * svx_TEXT_HEIGHT, // default 0.6
     * svx_MARKER_SIZE // default 0.8
     */

    if (m_layout.view != layout::EXTELEV) {
        wxFlexGridSizer* anglebox = new wxFlexGridSizer(2);
        wxStaticText * brg_label, * tilt_label;
        brg_label = new wxStaticText(this, -1, wmsg(/*Bearing*/259));
        anglebox->Add(brg_label, 0, wxALIGN_CENTER_VERTICAL|wxALIGN_LEFT|wxALL, 5);
        m_bearing = new wxSpinCtrl(this, svx_BEARING);
        m_bearing->SetRange(0, 359);
        anglebox->Add(m_bearing, 0, wxALIGN_CENTER|wxALL, 5);
        /* TRANSLATORS: Used in the print dialog: */
        tilt_label = new wxStaticText(this, -1, wmsg(/*Tilt angle*/263));
        anglebox->Add(tilt_label, 0, wxALIGN_CENTER_VERTICAL|wxALIGN_LEFT|wxALL, 5);
        m_tilt = new wxSpinCtrl(this, svx_TILT);
        m_tilt->SetRange(-90, 90);
        anglebox->Add(m_tilt, 0, wxALIGN_CENTER|wxALL, 5);

        m_viewbox->Add(anglebox, 0, wxALIGN_LEFT|wxALL, 0);

        wxBoxSizer * planelevsizer = new wxBoxSizer(wxHORIZONTAL);
        planelevsizer->Add(new wxButton(this, svx_PLAN, wmsg(/*P&lan view*/117)),
                           0, wxALIGN_CENTRE_VERTICAL|wxALL, 5);
        planelevsizer->Add(new wxButton(this, svx_ELEV, wmsg(/*&Elevation*/285)),
                           0, wxALIGN_CENTRE_VERTICAL|wxALL, 5);

        m_viewbox->Add(planelevsizer, 0, wxALIGN_LEFT|wxALL, 5);
    }

    /* TRANSLATORS: Here a "survey leg" is a set of measurements between two
     * "survey stations". */
    v3->Add(new wxCheckBox(this, svx_LEGS, wmsg(/*Underground Survey Legs*/262),
                           wxDefaultPosition, wxDefaultSize, 0,
                           BitValidator(&m_layout.show_mask, LEGS)),
            0, wxALIGN_LEFT|wxALL, 2);
    /* TRANSLATORS: Here a "survey leg" is a set of measurements between two
     * "survey stations". */
    v3->Add(new wxCheckBox(this, svx_SURFACE, wmsg(/*Sur&face Survey Legs*/403),
                           wxDefaultPosition, wxDefaultSize, 0,
                           BitValidator(&m_layout.show_mask, SURF)),
            0, wxALIGN_LEFT|wxALL, 2);
    v3->Add(new wxCheckBox(this, svx_STATIONS, wmsg(/*Crosses*/261),
                           wxDefaultPosition, wxDefaultSize, 0,
                           BitValidator(&m_layout.show_mask, STNS)),
            0, wxALIGN_LEFT|wxALL, 2);
    v3->Add(new wxCheckBox(this, svx_NAMES, wmsg(/*Station Names*/260),
                           wxDefaultPosition, wxDefaultSize, 0,
                           BitValidator(&m_layout.show_mask, LABELS)),
            0, wxALIGN_LEFT|wxALL, 2);
    v3->Add(new wxCheckBox(this, svx_ENTS, wmsg(/*Entrances*/418),
                           wxDefaultPosition, wxDefaultSize, 0,
                           BitValidator(&m_layout.show_mask, ENTS)),
            0, wxALIGN_LEFT|wxALL, 2);
    v3->Add(new wxCheckBox(this, svx_FIXES, wmsg(/*Fixed Points*/419),
                           wxDefaultPosition, wxDefaultSize, 0,
                           BitValidator(&m_layout.show_mask, FIXES)),
            0, wxALIGN_LEFT|wxALL, 2);
    v3->Add(new wxCheckBox(this, svx_EXPORTS, wmsg(/*Exported Stations*/420),
                           wxDefaultPosition, wxDefaultSize, 0,
                           BitValidator(&m_layout.show_mask, EXPORTS)),
            0, wxALIGN_LEFT|wxALL, 2);
    v3->Add(new wxCheckBox(this, svx_XSECT, wmsg(/*Cross-sections*/393),
                           wxDefaultPosition, wxDefaultSize, 0,
                           BitValidator(&m_layout.show_mask, XSECT)),
            0, wxALIGN_LEFT|wxALL, 2);
    if (!printing) {
        v3->Add(new wxCheckBox(this, svx_WALLS, wmsg(/*Walls*/394),
                               wxDefaultPosition, wxDefaultSize, 0,
                               BitValidator(&m_layout.show_mask, WALLS)),
                0, wxALIGN_LEFT|wxALL, 2);
        v3->Add(new wxCheckBox(this, svx_PASSAGES, wmsg(/*Passages*/395),
                               wxDefaultPosition, wxDefaultSize, 0,
                               BitValidator(&m_layout.show_mask, PASG)),
                0, wxALIGN_LEFT|wxALL, 2);
        v3->Add(new wxCheckBox(this, svx_CENTRED, wmsg(/*Origin in centre*/421),
                               wxDefaultPosition, wxDefaultSize, 0,
                               BitValidator(&m_layout.show_mask, CENTRED)),
                0, wxALIGN_LEFT|wxALL, 2);
        v3->Add(new wxCheckBox(this, svx_FULLCOORDS, wmsg(/*Full coordinates*/422),
                               wxDefaultPosition, wxDefaultSize, 0,
                               BitValidator(&m_layout.show_mask, FULL_COORDS)),
                0, wxALIGN_LEFT|wxALL, 2);
    }
    if (printing) {
        /* TRANSLATORS: used in the print dialog - controls drawing lines
         * around each page */
        v3->Add(new wxCheckBox(this, svx_BORDERS, wmsg(/*Page Borders*/264),
                               wxDefaultPosition, wxDefaultSize, 0,
                               wxGenericValidator(&m_layout.Border)),
                0, wxALIGN_LEFT|wxALL, 2);
        /* TRANSLATORS: will be used in the print dialog - check this to print
         * blank pages (otherwise they’ll be skipped to save paper) */
//      m_blanks = new wxCheckBox(this, svx_BLANKS, wmsg(/*Blank Pages*/266));
//      v3->Add(m_blanks, 0, wxALIGN_LEFT|wxALL, 2);
        /* TRANSLATORS: As in the legend on a map.  Used in the print dialog -
         * controls drawing the box at the lower left with survey name, view
         * angles, etc */
        v3->Add(new wxCheckBox(this, svx_LEGEND, wmsg(/*Legend*/265),
                               wxDefaultPosition, wxDefaultSize, 0,
                               wxGenericValidator(&m_layout.Legend)),
                0, wxALIGN_LEFT|wxALL, 2);
    }

    h1->Add(v3, 0, wxALIGN_LEFT|wxALL, 5);
    h1->Add(m_viewbox, 0, wxALIGN_LEFT|wxLEFT, 5);

    /* TRANSLATORS: The PROJ library is used to do coordinate transformations
     * (https://trac.osgeo.org/proj/) - if the .3d file doesn't contain details
     * of the coordinate projection in use, the user must specify it here for
     * export formats which need to know it (e.g. GPX).
     */
    h2->Add(new wxStaticText(this, svx_PROJ_LABEL, wmsg(/*Coordinate projection*/440)),
            0, wxLEFT|wxALIGN_CENTRE_VERTICAL, 5);
    long style = 0;
    if (!m_layout.cs_proj.empty()) {
        // If the input file specified the coordinate system, don't let the
        // user mess with it.
        style = wxTE_READONLY;
    } else {
#if 0 // FIXME: Is it a good idea to save this?
        wxConfigBase * cfg = wxConfigBase::Get();
        wxString input_projection;
        cfg->Read(wxT("input_projection"), &input_projection);
        if (!input_projection.empty())
            proj_edit.SetValue(input_projection);
#endif
    }
    wxTextCtrl * proj_edit = new wxTextCtrl(this, svx_PROJ, m_layout.cs_proj,
                                            wxDefaultPosition, wxDefaultSize,
                                            style);
    h2->Add(proj_edit, 1, wxALL|wxEXPAND|wxALIGN_CENTRE_VERTICAL, 5);
    v1->Add(h2, 0, wxALIGN_LEFT|wxEXPAND, 5);

    v1->Add(h1, 0, wxALIGN_LEFT|wxALL, 5);

    // When we enable/disable checkboxes in the export dialog, ideally we'd
    // like the dialog to resize, but not sure how to achieve that, so we
    // add a stretchable spacer here so at least the buttons stay in the
    // lower right corner.
    v1->AddStretchSpacer();

    wxButton * but;
    but = new wxButton(this, wxID_CANCEL);
    h3->Add(but, 0, wxALIGN_RIGHT|wxALL, 5);
    if (printing) {
#ifdef AVEN_PRINT_PREVIEW
        but = new wxButton(this, wxID_PREVIEW);
        h3->Add(but, 0, wxALIGN_RIGHT|wxALL, 5);
        but = new wxButton(this, wxID_PRINT);
#else
        but = new wxButton(this, wxID_PRINT, wmsg(/*&Print…*/400));
#endif
    } else {
        /* TRANSLATORS: The text on the action button in the "Export" settings
         * dialog */
        but = new wxButton(this, svx_EXPORT, wmsg(/*&Export…*/230));
    }
    but->SetDefault();
    h3->Add(but, 0, wxALIGN_RIGHT|wxALL, 5);
    v1->Add(h3, 0, wxALIGN_RIGHT|wxALL, 5);

    SetAutoLayout(true);
    SetSizer(v1);
    v1->SetSizeHints(this);

    LayoutToUI();
    SomethingChanged(0);
}

void
svxPrintDlg::OnPrint(wxCommandEvent&) {
    SomethingChanged(0);
    TransferDataFromWindow();
    wxPageSetupDialogData * psdd = wxGetApp().GetPageSetupDialogData();
    wxPrintDialogData pd(psdd->GetPrintData());
    wxPrinter pr(&pd);
    svxPrintout po(mainfrm, &m_layout, psdd, m_File);
    if (pr.Print(this, &po, true)) {
        // Close the print dialog if printing succeeded.
        Destroy();
    }
}

void
svxPrintDlg::OnExport(wxCommandEvent&) {
    UIToLayout();
    TransferDataFromWindow();
    wxString leaf;
    wxFileName::SplitPath(m_File, NULL, NULL, &leaf, NULL, wxPATH_NATIVE);
    unsigned format_idx = ((wxChoice*)FindWindow(svx_FORMAT))->GetSelection();
    leaf += wxString::FromUTF8(extension[format_idx]);

    wxString filespec = wmsg(msg_filetype[format_idx]);
    filespec += wxT("|*");
    filespec += wxString::FromUTF8(extension[format_idx]);
    filespec += wxT("|");
    filespec += wmsg(/*All files*/208);
    filespec += wxT("|");
    filespec += wxFileSelectorDefaultWildcardStr;

    /* TRANSLATORS: Title of file dialog to choose name and type of exported
     * file. */
    wxFileDialog dlg(this, wmsg(/*Export as:*/401), wxString(), leaf,
                     filespec, wxFD_SAVE|wxFD_OVERWRITE_PROMPT);
    if (dlg.ShowModal() == wxID_OK) {
        wxString input_projection = ((wxTextCtrl*)FindWindow(svx_PROJ))->GetValue();
        double grid = 100; // metres
        double text_height = 0.6;
        double marker_size = 0.8;

        try {
            if (!Export(dlg.GetPath(), m_layout.title,
                        m_layout.datestamp, m_layout.datestamp_numeric, mainfrm,
                        m_layout.rot, m_layout.tilt, m_layout.show_mask,
                        export_format(format_idx), input_projection.mb_str(),
                        grid, text_height, marker_size)) {
                wxString m = wxString::Format(wmsg(/*Couldn’t write file “%s”*/402).c_str(),
                                              m_File.c_str());
                wxGetApp().ReportError(m);
            }
        } catch (const wxString & m) {
            wxGetApp().ReportError(m);
        }
    }
    Destroy();
}

#ifdef AVEN_PRINT_PREVIEW
void
svxPrintDlg::OnPreview(wxCommandEvent&) {
    SomethingChanged(0);
    TransferDataFromWindow();
    wxPageSetupDialogData * psdd = wxGetApp().GetPageSetupDialogData();
    wxPrintDialogData pd(psdd->GetPrintData());
    wxPrintPreview* pv;
    pv = new wxPrintPreview(new svxPrintout(mainfrm, &m_layout, psdd, m_File),
                            new svxPrintout(mainfrm, &m_layout, psdd, m_File),
                            &pd);
    // TRANSLATORS: Title of the print preview dialog
    wxPreviewFrame *frame = new wxPreviewFrame(pv, mainfrm, wmsg(/*Print Preview*/398));
    frame->Initialize();

    // Size preview frame so that all of the controlbar and canvas can be seen
    // if possible.
    int w, h;
    // GetBestSize gives us the width needed to show the whole controlbar.
    frame->GetBestSize(&w, &h);
#ifdef __WXMAC__
    // wxMac opens the preview window at minimum size by default.
    // 360x480 is apparently enough to show A4 portrait.
    if (h < 480 || w < 360) {
        if (h < 480) h = 480;
        if (w < 360) w = 360;
    }
#else
    if (h < w) {
        // On wxGTK at least, GetBestSize() returns much too small a height.
        h = w * 6 / 5;
    }
#endif
    // Ensure that we don't make the window bigger than the screen.
    // Use wxGetClientDisplayRect() so we don't cover the MS Windows
    // task bar either.
    wxRect disp = wxGetClientDisplayRect();
    if (w > disp.GetWidth()) w = disp.GetWidth();
    if (h > disp.GetHeight()) h = disp.GetHeight();
    // Centre the window within the "ClientDisplayRect".
    int x = disp.GetLeft() + (disp.GetWidth() - w) / 2;
    int y = disp.GetTop() + (disp.GetHeight() - h) / 2;
    frame->SetSize(x, y, w, h);

    frame->Show();
}
#endif

void
svxPrintDlg::OnPlan(wxCommandEvent&) {
    m_tilt->SetValue(-90);
    SomethingChanged(svx_TILT);
}

void
svxPrintDlg::OnElevation(wxCommandEvent&) {
    m_tilt->SetValue(0);
    SomethingChanged(svx_TILT);
}

void
svxPrintDlg::OnPlanUpdate(wxUpdateUIEvent& e) {
    e.Enable(m_tilt->GetValue() != -90);
}

void
svxPrintDlg::OnElevationUpdate(wxUpdateUIEvent& e) {
    e.Enable(m_tilt->GetValue() != 0);
}

void
svxPrintDlg::OnChangeSpin(wxSpinEvent& e) {
    SomethingChanged(e.GetId());
}

void
svxPrintDlg::OnChange(wxCommandEvent& e) {
    SomethingChanged(e.GetId());
}

void
svxPrintDlg::OnCancel(wxCommandEvent&) {
    if (close_after)
        mainfrm->Close();
    Destroy();
}

void
svxPrintDlg::SomethingChanged(int control_id) {
    if ((control_id == 0 || control_id == svx_FORMAT) && m_format) {
        // Update the shown/hidden fields for the newly selected export filter.
        int new_filter_idx = m_format->GetSelection();
        if (new_filter_idx != wxNOT_FOUND) {
            unsigned mask = format_info[new_filter_idx];
            static const struct { int id; unsigned mask; } controls[] = {
                { svx_LEGS, LEGS },
                { svx_SURFACE, SURF },
                { svx_STATIONS, STNS },
                { svx_NAMES, LABELS },
                { svx_XSECT, XSECT },
                { svx_WALLS, WALLS },
                { svx_PASSAGES, PASG },
                { svx_ENTS, ENTS },
                { svx_FIXES, FIXES },
                { svx_EXPORTS, EXPORTS },
                { svx_CENTRED, CENTRED },
                { svx_FULLCOORDS, FULL_COORDS },
                { svx_PROJ_LABEL, PROJ },
                { svx_PROJ, PROJ },
            };
            static unsigned n_controls = sizeof(controls) / sizeof(controls[0]);
            for (unsigned i = 0; i != n_controls; ++i) {
                wxWindow * control = FindWindow(controls[i].id);
                if (control) control->Show(mask & controls[i].mask);
            }
            m_scalebox->Show(bool(mask & SCALE));
            m_viewbox->Show(!bool(mask & EXPORT_3D));
            GetSizer()->Layout();
            if (control_id == svx_FORMAT) {
                wxConfigBase * cfg = wxConfigBase::Get();
                cfg->Write(wxT("export_format"), formats[new_filter_idx]);
            }
        }
    }

    UIToLayout();
    if (!m_printSize) return;
    // Update the bounding box.
    RecalcBounds();

    if (m_scale) {
        (m_scale->GetValue()).ToDouble(&(m_layout.Scale));
        if (m_layout.Scale == 0.0) {
            m_layout.pick_scale(1, 1);
        }
    }

    if (m_layout.xMax >= m_layout.xMin) {
        m_layout.pages_required();
        m_printSize->SetLabel(wxString::Format(wmsg(/*%d pages (%dx%d)*/257), m_layout.pages, m_layout.pagesX, m_layout.pagesY));
    }
}

void
svxPrintDlg::LayoutToUI(){
//    m_blanks->SetValue(m_layout.SkipBlank);
    if (m_layout.view != layout::EXTELEV) {
        m_tilt->SetValue(m_layout.tilt);
        m_bearing->SetValue(m_layout.rot);
    }

    // Do this last as it causes an OnChange message which calls UIToLayout
    if (m_scale) {
        if (m_layout.Scale != 0) {
            wxString temp;
            temp << m_layout.Scale;
            m_scale->SetValue(temp);
        } else {
            if (scales[0].empty()) scales[0].assign(wmsg(/*One page*/258));
            m_scale->SetValue(scales[0]);
        }
    }
}

void
svxPrintDlg::UIToLayout(){
//    m_layout.SkipBlank = m_blanks->IsChecked();

    if (m_layout.view != layout::EXTELEV && m_tilt) {
        m_layout.tilt = m_tilt->GetValue();
        if (m_layout.tilt == -90) {
            m_layout.view = layout::PLAN;
        } else if (m_layout.tilt == 0) {
            m_layout.view = layout::ELEV;
        } else {
            m_layout.view = layout::TILT;
        }

        bool enable_passage_opts = (m_layout.view != layout::TILT);
        wxWindow * win;
        win = FindWindow(svx_XSECT);
        if (win) win->Enable(enable_passage_opts);
        win = FindWindow(svx_WALLS);
        if (win) win->Enable(enable_passage_opts);
        win = FindWindow(svx_PASSAGES);
        if (win) win->Enable(enable_passage_opts);

        m_layout.rot = m_bearing->GetValue();
    }
}

void
svxPrintDlg::RecalcBounds()
{
    m_layout.yMax = m_layout.xMax = -DBL_MAX;
    m_layout.yMin = m_layout.xMin = DBL_MAX;

    double SIN = sin(rad(m_layout.rot));
    double COS = cos(rad(m_layout.rot));
    double SINT = sin(rad(m_layout.tilt));
    double COST = cos(rad(m_layout.tilt));

    if (m_layout.show_mask & LEGS) {
        list<traverse>::const_iterator trav = mainfrm->traverses_begin();
        list<traverse>::const_iterator tend = mainfrm->traverses_end();
        for ( ; trav != tend; ++trav) {
            vector<PointInfo>::const_iterator pos = trav->begin();
            vector<PointInfo>::const_iterator end = trav->end();
            for ( ; pos != end; ++pos) {
                double x = pos->GetX();
                double y = pos->GetY();
                double z = pos->GetZ();
                double X = x * COS - y * SIN;
                if (X > m_layout.xMax) m_layout.xMax = X;
                if (X < m_layout.xMin) m_layout.xMin = X;
                double Y = z * COST - (x * SIN + y * COS) * SINT;
                if (Y > m_layout.yMax) m_layout.yMax = Y;
                if (Y < m_layout.yMin) m_layout.yMin = Y;
            }
        }
    }
    if (m_layout.show_mask & SURF) {
        list<traverse>::const_iterator trav = mainfrm->surface_traverses_begin();
        list<traverse>::const_iterator tend = mainfrm->surface_traverses_end();
        for ( ; trav != tend; ++trav) {
            vector<PointInfo>::const_iterator pos = trav->begin();
            vector<PointInfo>::const_iterator end = trav->end();
            for ( ; pos != end; ++pos) {
                double x = pos->GetX();
                double y = pos->GetY();
                double z = pos->GetZ();
                double X = x * COS - y * SIN;
                if (X > m_layout.xMax) m_layout.xMax = X;
                if (X < m_layout.xMin) m_layout.xMin = X;
                double Y = z * COST - (x * SIN + y * COS) * SINT;
                if (Y > m_layout.yMax) m_layout.yMax = Y;
                if (Y < m_layout.yMin) m_layout.yMin = Y;
            }
        }
    }
    if (m_layout.show_mask & (LABELS|STNS)) {
        list<LabelInfo*>::const_iterator label = mainfrm->GetLabels();
        while (label != mainfrm->GetLabelsEnd()) {
            double x = (*label)->GetX();
            double y = (*label)->GetY();
            double z = (*label)->GetZ();
            if ((m_layout.show_mask & SURF) || (*label)->IsUnderground()) {
                double X = x * COS - y * SIN;
                if (X > m_layout.xMax) m_layout.xMax = X;
                if (X < m_layout.xMin) m_layout.xMin = X;
                double Y = z * COST - (x * SIN + y * COS) * SINT;
                if (Y > m_layout.yMax) m_layout.yMax = Y;
                if (Y < m_layout.yMin) m_layout.yMin = Y;
            }
            ++label;
        }
    }
}

static int xpPageWidth, ypPageDepth;
static long MarginLeft, MarginRight, MarginTop, MarginBottom;
static long x_offset, y_offset;
static wxFont *font_labels, *font_default;
static int fontsize, fontsize_labels;

/* FIXME: allow the font to be set */

static const char *fontname = "Arial", *fontname_labels = "Arial";

// wx <-> prcore (calls to print_page etc...)
svxPrintout::svxPrintout(MainFrm *mainfrm_, layout *l,
                         wxPageSetupDialogData *data, const wxString & title)
    : wxPrintout(title)
{
    mainfrm = mainfrm_;
    m_layout = l;
    m_data = data;
}

void
svxPrintout::draw_info_box()
{
   layout *l = m_layout;
   int boxwidth = 70;
   int boxheight = 30;

   SetColour(PR_COLOUR_FRAME);

   int div = boxwidth;
   if (l->view != layout::EXTELEV) {
      boxwidth += boxheight;
      MOVEMM(div, boxheight);
      DRAWMM(div, 0);
      MOVEMM(0, 30); DRAWMM(div, 30);
   }

   MOVEMM(0, boxheight);
   DRAWMM(boxwidth, boxheight);
   DRAWMM(boxwidth, 0);
   if (!l->Border) {
      DRAWMM(0, 0);
      DRAWMM(0, boxheight);
   }

   MOVEMM(0, 20); DRAWMM(div, 20);
   MOVEMM(0, 10); DRAWMM(div, 10);

   switch (l->view) {
    case layout::PLAN: {
      long ax, ay, bx, by, cx, cy, dx, dy;

      long xc = boxwidth - boxheight / 2;
      long yc = boxheight / 2;
      const double RADIUS = boxheight / 3;
      DrawEllipse(long(xc * l->scX), long(yc * l->scY),
                  long(RADIUS * l->scX), long(RADIUS * l->scY));

      ax = (long)((xc - (RADIUS - 1) * sin(rad(000.0 + l->rot))) * l->scX);
      ay = (long)((yc + (RADIUS - 1) * cos(rad(000.0 + l->rot))) * l->scY);
      bx = (long)((xc - RADIUS * 0.5 * sin(rad(180.0 + l->rot))) * l->scX);
      by = (long)((yc + RADIUS * 0.5 * cos(rad(180.0 + l->rot))) * l->scY);
      cx = (long)((xc - (RADIUS - 1) * sin(rad(160.0 + l->rot))) * l->scX);
      cy = (long)((yc + (RADIUS - 1) * cos(rad(160.0 + l->rot))) * l->scY);
      dx = (long)((xc - (RADIUS - 1) * sin(rad(200.0 + l->rot))) * l->scX);
      dy = (long)((yc + (RADIUS - 1) * cos(rad(200.0 + l->rot))) * l->scY);

      MoveTo(ax, ay);
      DrawTo(bx, by);
      DrawTo(cx, cy);
      DrawTo(ax, ay);
      DrawTo(dx, dy);
      DrawTo(bx, by);

      SetColour(PR_COLOUR_TEXT);
      MOVEMM(div + 0.5, boxheight - 5.5);
      WriteString(wmsg(/*North*/115));

      wxString angle;
      angle.Printf(wxT("%03d"), l->rot);
      angle += wmsg(/*°*/344);
      wxString s;
      /* TRANSLATORS: This is used on printouts of plans, with %s replaced by
       * something like "123°".  The bearing is up the page. */
      s.Printf(wmsg(/*Plan view, %s up page*/168), angle.c_str());
      MOVEMM(2, 12); WriteString(s);
      break;
    }
    case layout::ELEV: case layout::TILT: {
      const int L = div + 2;
      const int R = boxwidth - 2;
      const int H = boxheight / 2;
      MOVEMM(L, H); DRAWMM(L + 5, H - 3); DRAWMM(L + 3, H); DRAWMM(L + 5, H + 3);

      DRAWMM(L, H); DRAWMM(R, H);

      DRAWMM(R - 5, H + 3); DRAWMM(R - 3, H); DRAWMM(R - 5, H - 3); DRAWMM(R, H);

      MOVEMM((L + R) / 2, H - 2); DRAWMM((L + R) / 2, H + 2);

      SetColour(PR_COLOUR_TEXT);
      MOVEMM(div + 2, boxheight - 8);
      /* TRANSLATORS: "Elevation on" 020 <-> 200 degrees */
      WriteString(wmsg(/*Elevation on*/116));
      
      MOVEMM(L, 2);
      WriteString(wxString::Format(wxT("%03d%s"),
                                   (l->rot + 270) % 360,
                                   wmsg(/*°*/344).c_str()));
      MOVEMM(R - 10, 2);
      WriteString(wxString::Format(wxT("%03d%s"),
                                   (l->rot + 90) % 360,
                                   wmsg(/*°*/344).c_str()));

      wxString angle;
      angle.Printf(wxT("%03d"), l->rot);
      angle += wmsg(/*°*/344);
      wxString s;
      if (l->view == layout::ELEV) {
          /* TRANSLATORS: This is used on printouts of elevations, with %s
           * replaced by something like "123°".  The bearing is the direction
           * we’re looking. */
          s.Printf(wmsg(/*Elevation facing %s*/169), angle.c_str());
      } else {
          wxString a2;
          a2.Printf(wxT("%d"), l->tilt);
          a2 += wmsg(/*°*/344);
          /* TRANSLATORS: This is used on printouts of tilted elevations, with
           * the first %s replaced by something like "123°", and the second by
           * something like "-45°".  The bearing is the direction we’re
           * looking. */
          s.Printf(wmsg(/*Elevation facing %s, tilted %s*/284), angle.c_str(), a2.c_str());
      }
      MOVEMM(2, 12); WriteString(s);
      break;
    }
    case layout::EXTELEV:
      SetColour(PR_COLOUR_TEXT);
      MOVEMM(2, 12);
      /* TRANSLATORS: This is used on printouts of extended elevations. */
      WriteString(wmsg(/*Extended elevation*/191));
      break;
   }

   MOVEMM(2, boxheight - 8); WriteString(l->title);

   MOVEMM(2, 2);
   // FIXME: "Original Scale" better?
   WriteString(wxString::Format(wmsg(/*Scale*/154) + wxT(" 1:%.0f"),
                                l->Scale));

   /* This used to be a copyright line, but it was occasionally
    * mis-interpreted as us claiming copyright on the survey, so let's
    * give the website URL instead */
   MOVEMM(boxwidth + 2, 2);
   WriteString(wxT("Survex "VERSION" - http://survex.com/"));

   draw_scale_bar(boxwidth + 10.0, 17.0, l->PaperWidth - boxwidth - 18.0);
}

/* Draw fancy scale bar with bottom left at (x,y) (both in mm) and at most */
/* MaxLength mm long. The scaling in use is 1:scale */
void
svxPrintout::draw_scale_bar(double x, double y, double MaxLength)
{
   double StepEst, d;
   int E, Step, n, c;
   wxString buf;
   /* Limit scalebar to 20cm to stop people with A0 plotters complaining */
   if (MaxLength > 200.0) MaxLength = 200.0;

#define dmin 10.0      /* each division >= dmin mm long */
#define StepMax 5      /* number in steps of at most StepMax (x 10^N) */
#define epsilon (1e-4) /* fudge factor to prevent rounding problems */

   E = (int)ceil(log10((dmin * 0.001 * m_layout->Scale) / StepMax));
   StepEst = pow(10.0, -(double)E) * (dmin * 0.001) * m_layout->Scale - epsilon;

   /* Force labelling to be in multiples of 1, 2, or 5 */
   Step = (StepEst <= 1.0 ? 1 : (StepEst <= 2.0 ? 2 : 5));

   /* Work out actual length of each scale bar division */
   d = Step * pow(10.0, (double)E) / m_layout->Scale * 1000.0;

   /* FIXME: Non-metric units here... */
   /* Choose appropriate units, s.t. if possible E is >=0 and minimized */
   int units;
   if (E >= 3) {
      E -= 3;
      units = /*km*/423;
   } else if (E >= 0) {
      units = /*m*/424;
   } else {
      E += 2;
      units = /*cm*/425;
   }

   buf = wmsg(/*Scale*/154);

   /* Add units used - eg. "Scale (10m)" */
   double pow10_E = pow(10.0, (double)E);
   if (E >= 0) {
      buf += wxString::Format(wxT(" (%.f%s)"), pow10_E, wmsg(units).c_str());
   } else {
      int sf = -(int)floor(E);
      buf += wxString::Format(wxT(" (%.*f%s)"), sf, pow10_E, wmsg(units).c_str());
   }
   SetColour(PR_COLOUR_TEXT);
   MOVEMM(x, y + 4); WriteString(buf);

   /* Work out how many divisions there will be */
   n = (int)(MaxLength / d);

   SetColour(PR_COLOUR_FRAME);

   long Y = long(y * m_layout->scY);
   long Y2 = long((y + 3) * m_layout->scY);
   long X = long(x * m_layout->scX);
   long X2 = long((x + n * d) * m_layout->scX);

   /* Draw top of scale bar */
   MoveTo(X2, Y2);
   DrawTo(X, Y2);
#if 0
   DrawTo(X2, Y);
   DrawTo(X, Y);
   MOVEMM(x + n * d, y); DRAWMM(x, y);
#endif
   /* Draw divisions and label them */
   for (c = 0; c <= n; c++) {
      SetColour(PR_COLOUR_FRAME);
      X = long((x + c * d) * m_layout->scX);
      MoveTo(X, Y);
      DrawTo(X, Y2);
#if 0 // Don't waste toner!
      /* Draw a "zebra crossing" scale bar. */
      if (c < n && (c & 1) == 0) {
          X2 = long((x + (c + 1) * d) * m_layout->scX);
          SolidRectangle(X, Y, X2 - X, Y2 - Y);
      }
#endif
      buf.Printf(wxT("%d"), c * Step);
      SetColour(PR_COLOUR_TEXT);
      MOVEMM(x + c * d - buf.length(), y - 5);
      WriteString(buf);
   }
}

#if 0
void
make_calibration(layout *l) {
      img_point pt = { 0.0, 0.0, 0.0 };
      l->xMax = l->yMax = 0.1;
      l->xMin = l->yMin = 0;

      stack(l,img_MOVE, NULL, &pt);
      pt.x = 0.1;
      stack(l,img_LINE, NULL, &pt);
      pt.y = 0.1;
      stack(l,img_LINE, NULL, &pt);
      pt.x = 0.0;
      stack(l,img_LINE, NULL, &pt);
      pt.y = 0.0;
      stack(l,img_LINE, NULL, &pt);
      pt.x = 0.05;
      pt.y = 0.001;
      stack(l,img_LABEL, "10cm", &pt);
      pt.x = 0.001;
      pt.y = 0.05;
      stack(l,img_LABEL, "10cm", &pt);
      l->Scale = 1.0;
}
#endif

int
svxPrintout::next_page(int *pstate, char **q, int pageLim)
{
   char *p;
   int page;
   int c;
   p = *q;
   if (*pstate > 0) {
      /* doing a range */
      (*pstate)++;
      SVX_ASSERT(*p == '-');
      p++;
      while (isspace((unsigned char)*p)) p++;
      if (sscanf(p, "%u%n", &page, &c) > 0) {
         p += c;
      } else {
         page = pageLim;
      }
      if (*pstate > page) goto err;
      if (*pstate < page) return *pstate;
      *q = p;
      *pstate = 0;
      return page;
   }

   while (isspace((unsigned char)*p) || *p == ',') p++;

   if (!*p) return 0; /* done */

   if (*p == '-') {
      *q = p;
      *pstate = 1;
      return 1; /* range with initial parameter omitted */
   }
   if (sscanf(p, "%u%n", &page, &c) > 0) {
      p += c;
      while (isspace((unsigned char)*p)) p++;
      *q = p;
      if (0 < page && page <= pageLim) {
         if (*p == '-') *pstate = page; /* range with start */
         return page;
      }
   }
   err:
   *pstate = -1;
   return 0;
}

/* Draws in alignment marks on each page or borders on edge pages */
void
svxPrintout::drawticks(border clip, int tsize, int x, int y)
{
   long i;
   int s = tsize * 4;
   int o = s / 8;
   bool fAtCorner = fFalse;
   SetColour(PR_COLOUR_FRAME);
   if (x == 0 && m_layout->Border) {
      /* solid left border */
      MoveTo(clip.x_min, clip.y_min);
      DrawTo(clip.x_min, clip.y_max);
      fAtCorner = fTrue;
   } else {
      if (x > 0 || y > 0) {
         MoveTo(clip.x_min, clip.y_min);
         DrawTo(clip.x_min, clip.y_min + tsize);
      }
      if (s && x > 0 && m_layout->Cutlines) {
         /* dashed left border */
         i = (clip.y_max - clip.y_min) -
             (tsize + ((clip.y_max - clip.y_min - tsize * 2L) % s) / 2);
         for ( ; i > tsize; i -= s) {
            MoveTo(clip.x_min, clip.y_max - (i + o));
            DrawTo(clip.x_min, clip.y_max - (i - o));
         }
      }
      if (x > 0 || y < m_layout->pagesY - 1) {
         MoveTo(clip.x_min, clip.y_max - tsize);
         DrawTo(clip.x_min, clip.y_max);
         fAtCorner = fTrue;
      }
   }

   if (y == m_layout->pagesY - 1 && m_layout->Border) {
      /* solid top border */
      if (!fAtCorner) MoveTo(clip.x_min, clip.y_max);
      DrawTo(clip.x_max, clip.y_max);
      fAtCorner = fTrue;
   } else {
      if (y < m_layout->pagesY - 1 || x > 0) {
         if (!fAtCorner) MoveTo(clip.x_min, clip.y_max);
         DrawTo(clip.x_min + tsize, clip.y_max);
      }
      if (s && y < m_layout->pagesY - 1 && m_layout->Cutlines) {
         /* dashed top border */
         i = (clip.x_max - clip.x_min) -
             (tsize + ((clip.x_max - clip.x_min - tsize * 2L) % s) / 2);
         for ( ; i > tsize; i -= s) {
            MoveTo(clip.x_max - (i + o), clip.y_max);
            DrawTo(clip.x_max - (i - o), clip.y_max);
         }
      }
      if (y < m_layout->pagesY - 1 || x < m_layout->pagesX - 1) {
         MoveTo(clip.x_max - tsize, clip.y_max);
         DrawTo(clip.x_max, clip.y_max);
         fAtCorner = fTrue;
      } else {
         fAtCorner = fFalse;
      }
   }

   if (x == m_layout->pagesX - 1 && m_layout->Border) {
      /* solid right border */
      if (!fAtCorner) MoveTo(clip.x_max, clip.y_max);
      DrawTo(clip.x_max, clip.y_min);
      fAtCorner = fTrue;
   } else {
      if (x < m_layout->pagesX - 1 || y < m_layout->pagesY - 1) {
         if (!fAtCorner) MoveTo(clip.x_max, clip.y_max);
         DrawTo(clip.x_max, clip.y_max - tsize);
      }
      if (s && x < m_layout->pagesX - 1 && m_layout->Cutlines) {
         /* dashed right border */
         i = (clip.y_max - clip.y_min) -
             (tsize + ((clip.y_max - clip.y_min - tsize * 2L) % s) / 2);
         for ( ; i > tsize; i -= s) {
            MoveTo(clip.x_max, clip.y_min + (i + o));
            DrawTo(clip.x_max, clip.y_min + (i - o));
         }
      }
      if (x < m_layout->pagesX - 1 || y > 0) {
         MoveTo(clip.x_max, clip.y_min + tsize);
         DrawTo(clip.x_max, clip.y_min);
         fAtCorner = fTrue;
      } else {
         fAtCorner = fFalse;
      }
   }

   if (y == 0 && m_layout->Border) {
      /* solid bottom border */
      if (!fAtCorner) MoveTo(clip.x_max, clip.y_min);
      DrawTo(clip.x_min, clip.y_min);
   } else {
      if (y > 0 || x < m_layout->pagesX - 1) {
         if (!fAtCorner) MoveTo(clip.x_max, clip.y_min);
         DrawTo(clip.x_max - tsize, clip.y_min);
      }
      if (s && y > 0 && m_layout->Cutlines) {
         /* dashed bottom border */
         i = (clip.x_max - clip.x_min) -
             (tsize + ((clip.x_max - clip.x_min - tsize * 2L) % s) / 2);
         for ( ; i > tsize; i -= s) {
            MoveTo(clip.x_min + (i + o), clip.y_min);
            DrawTo(clip.x_min + (i - o), clip.y_min);
         }
      }
      if (y > 0 || x > 0) {
         MoveTo(clip.x_min + tsize, clip.y_min);
         DrawTo(clip.x_min, clip.y_min);
      }
   }
}

bool
svxPrintout::OnPrintPage(int pageNum) {
    GetPageSizePixels(&xpPageWidth, &ypPageDepth);
    pdc = GetDC();
#ifdef AVEN_PRINT_PREVIEW
    if (IsPreview()) {
        int dcx, dcy;
        pdc->GetSize(&dcx, &dcy);
        pdc->SetUserScale((double)dcx / xpPageWidth, (double)dcy / ypPageDepth);
    }
#endif

    layout * l = m_layout;
    {
        int pwidth, pdepth;
        GetPageSizeMM(&pwidth, &pdepth);
        l->scX = (double)xpPageWidth / pwidth;
        l->scY = (double)ypPageDepth / pdepth;
        font_scaling_x = l->scX * (25.4 / 72.0);
        font_scaling_y = l->scY * (25.4 / 72.0);
        MarginLeft = m_data->GetMarginTopLeft().x;
        MarginTop = m_data->GetMarginTopLeft().y;
        MarginBottom = m_data->GetMarginBottomRight().y;
        MarginRight = m_data->GetMarginBottomRight().x;
        xpPageWidth -= (int)(l->scX * (MarginLeft + MarginRight));
        ypPageDepth -= (int)(l->scY * (10 + MarginBottom + MarginRight));
        // xpPageWidth -= 1;
        pdepth -= 10;
        x_offset = (long)(l->scX * MarginLeft);
        y_offset = (long)(l->scY * MarginTop);
        l->PaperWidth = pwidth -= MarginLeft + MarginRight;
        l->PaperDepth = pdepth -= MarginTop + MarginBottom;
    }

    double SIN = sin(rad(l->rot));
    double COS = cos(rad(l->rot));
    double SINT = sin(rad(l->tilt));
    double COST = cos(rad(l->tilt));

    NewPage(pageNum, l->pagesX, l->pagesY);

    if (l->Legend && pageNum == (l->pagesY - 1) * l->pagesX + 1) {
        SetFont(PR_FONT_DEFAULT);
        draw_info_box();
    }

    pdc->SetClippingRegion(x_offset, y_offset,xpPageWidth+1, ypPageDepth+1);

    const double Sc = 1000 / l->Scale;

    if (l->show_mask & LEGS) {
        SetColour(PR_COLOUR_LEG);
        list<traverse>::const_iterator trav = mainfrm->traverses_begin();
        list<traverse>::const_iterator tend = mainfrm->traverses_end();
        for ( ; trav != tend; ++trav) {
            vector<PointInfo>::const_iterator pos = trav->begin();
            vector<PointInfo>::const_iterator end = trav->end();
            for ( ; pos != end; ++pos) {
                double x = pos->GetX();
                double y = pos->GetY();
                double z = pos->GetZ();
                double X = x * COS - y * SIN;
                double Y = z * COST - (x * SIN + y * COS) * SINT;
                long px = (long)((X * Sc + l->xOrg) * l->scX);
                long py = (long)((Y * Sc + l->yOrg) * l->scY);
                if (pos == trav->begin()) {
                    MoveTo(px, py);
                } else {
                    DrawTo(px, py);
                }
            }
        }
    }

    if ((l->show_mask & XSECT) &&
        (l->tilt == 0.0 || l->tilt == 90.0 || l->tilt == -90.0)) {
        list<vector<XSect> >::const_iterator trav = mainfrm->tubes_begin();
        list<vector<XSect> >::const_iterator tend = mainfrm->tubes_end();
        for ( ; trav != tend; ++trav) {
            if (l->tilt == 90.0 || l->tilt == -90.0) PlotLR(*trav);
            if (l->tilt == 0.0) PlotUD(*trav);
        }
    }

    if (l->show_mask & SURF) {
        SetColour(PR_COLOUR_SURFACE_LEG);
        list<traverse>::const_iterator trav = mainfrm->surface_traverses_begin();
        list<traverse>::const_iterator tend = mainfrm->surface_traverses_end();
        for ( ; trav != tend; ++trav) {
            vector<PointInfo>::const_iterator pos = trav->begin();
            vector<PointInfo>::const_iterator end = trav->end();
            for ( ; pos != end; ++pos) {
                double x = pos->GetX();
                double y = pos->GetY();
                double z = pos->GetZ();
                double X = x * COS - y * SIN;
                double Y = z * COST - (x * SIN + y * COS) * SINT;
                long px = (long)((X * Sc + l->xOrg) * l->scX);
                long py = (long)((Y * Sc + l->yOrg) * l->scY);
                if (pos == trav->begin()) {
                    MoveTo(px, py);
                } else {
                    DrawTo(px, py);
                }
            }
        }
    }

    if (l->show_mask & (LABELS|STNS)) {
        if (l->show_mask & LABELS) SetFont(PR_FONT_LABELS);
        list<LabelInfo*>::const_iterator label = mainfrm->GetLabels();
        while (label != mainfrm->GetLabelsEnd()) {
            double px = (*label)->GetX();
            double py = (*label)->GetY();
            double pz = (*label)->GetZ();
            if ((l->show_mask & SURF) || (*label)->IsUnderground()) {
                double X = px * COS - py * SIN;
                double Y = pz * COST - (px * SIN + py * COS) * SINT;
                long xnew, ynew;
                xnew = (long)((X * Sc + l->xOrg) * l->scX);
                ynew = (long)((Y * Sc + l->yOrg) * l->scY);
                if (l->show_mask & STNS) {
                    SetColour(PR_COLOUR_CROSS);
                    DrawCross(xnew, ynew);
                }
                if (l->show_mask & LABELS) {
                    SetColour(PR_COLOUR_LABELS);
                    MoveTo(xnew, ynew);
                    WriteString((*label)->GetText());
                }
            }
            ++label;
        }
    }

    return true;
}

void
svxPrintout::GetPageInfo(int *minPage, int *maxPage,
                         int *pageFrom, int *pageTo)
{
    *minPage = *pageFrom = 1;
    *maxPage = *pageTo = m_layout->pages;
}

bool
svxPrintout::HasPage(int pageNum) {
    return (pageNum <= m_layout->pages);
}

void
svxPrintout::OnBeginPrinting() {
    FILE *fh_list[4];

    FILE **pfh = fh_list;
    FILE *fh;
    const char *pth_cfg;
    char *print_ini;

    /* ini files searched in this order:
     * ~/.survex/print.ini [unix only]
     * /etc/survex/print.ini [unix only]
     * <support file directory>/myprint.ini [not unix]
     * <support file directory>/print.ini [must exist]
     */

#ifdef __UNIX__
    pth_cfg = getenv("HOME");
    if (pth_cfg) {
        fh = fopenWithPthAndExt(pth_cfg, ".survex/print."EXT_INI, NULL,
                "rb", NULL);
        if (fh) *pfh++ = fh;
    }
    pth_cfg = msg_cfgpth();
    fh = fopenWithPthAndExt(NULL, "/etc/survex/print."EXT_INI, NULL, "rb",
            NULL);
    if (fh) *pfh++ = fh;
#else
    pth_cfg = msg_cfgpth();
    print_ini = add_ext("myprint", EXT_INI);
    fh = fopenWithPthAndExt(pth_cfg, print_ini, NULL, "rb", NULL);
    if (fh) *pfh++ = fh;
#endif
    print_ini = add_ext("print", EXT_INI);
    fh = fopenWithPthAndExt(pth_cfg, print_ini, NULL, "rb", NULL);
    if (!fh) fatalerror(/*Couldn’t open file “%s”*/24, print_ini);
    *pfh++ = fh;
    *pfh = NULL;
    Init(pfh, false);
    for (pfh = fh_list; *pfh; pfh++) (void)fclose(*pfh);
    Pre();
    m_layout->footer = wmsg(/*Survey “%s”   Page %d (of %d)   Processed on %s*/167);
}

void
svxPrintout::OnEndPrinting() {
    delete font_labels;
    delete font_default;
    delete pen_frame;
    delete pen_leg;
    delete pen_surface_leg;
    delete pen_cross;
}


// prcore -> wx.grafx (calls to move pens around and stuff - low level)
// this seems to have been done...



static border clip;


int
svxPrintout::check_intersection(long x_p, long y_p)
{
#define U 1
#define D 2
#define L 4
#define R 8
   int mask_p = 0, mask_t = 0;
   if (x_p < 0)
      mask_p = L;
   else if (x_p > xpPageWidth)
      mask_p = R;

   if (y_p < 0)
      mask_p |= D;
   else if (y_p > ypPageDepth)
      mask_p |= U;

   if (x_t < 0)
      mask_t = L;
   else if (x_t > xpPageWidth)
      mask_t = R;

   if (y_t < 0)
      mask_t |= D;
   else if (y_t > ypPageDepth)
      mask_t |= U;

#if 0
   /* approximation to correct answer */
   return !(mask_t & mask_p);
#else
   /* One end of the line is on the page */
   if (!mask_t || !mask_p) return 1;

   /* whole line is above, left, right, or below page */
   if (mask_t & mask_p) return 0;

   if (mask_t == 0) mask_t = mask_p;
   if (mask_t & U) {
      double v = (double)(y_p - ypPageDepth) / (y_p - y_t);
      return v >= 0 && v <= 1;
   }
   if (mask_t & D) {
      double v = (double)y_p / (y_p - y_t);
      return v >= 0 && v <= 1;
   }
   if (mask_t & R) {
      double v = (double)(x_p - xpPageWidth) / (x_p - x_t);
      return v >= 0 && v <= 1;
   }
   SVX_ASSERT(mask_t & L);
   {
      double v = (double)x_p / (x_p - x_t);
      return v >= 0 && v <= 1;
   }
#endif
#undef U
#undef D
#undef L
#undef R
}

void
svxPrintout::MoveTo(long x, long y)
{
    x_t = x_offset + x - clip.x_min;
    y_t = y_offset + clip.y_max - y;
}

void
svxPrintout::DrawTo(long x, long y)
{
    long x_p = x_t, y_p = y_t;
    x_t = x_offset + x - clip.x_min;
    y_t = y_offset + clip.y_max - y;
    if (cur_pass != -1) {
        pdc->DrawLine(x_p, y_p, x_t, y_t);
    } else {
        if (check_intersection(x_p, y_p)) fBlankPage = fFalse;
    }
}

#define POINTS_PER_INCH 72.0
#define POINTS_PER_MM (POINTS_PER_INCH / MM_PER_INCH)
#define PWX_CROSS_SIZE (int)(2 * m_layout->scX / POINTS_PER_MM)

void
svxPrintout::DrawCross(long x, long y)
{
   if (cur_pass != -1) {
      MoveTo(x - PWX_CROSS_SIZE, y - PWX_CROSS_SIZE);
      DrawTo(x + PWX_CROSS_SIZE, y + PWX_CROSS_SIZE);
      MoveTo(x + PWX_CROSS_SIZE, y - PWX_CROSS_SIZE);
      DrawTo(x - PWX_CROSS_SIZE, y + PWX_CROSS_SIZE);
      MoveTo(x, y);
   } else {
      if ((x + PWX_CROSS_SIZE > clip.x_min &&
           x - PWX_CROSS_SIZE < clip.x_max) ||
          (y + PWX_CROSS_SIZE > clip.y_min &&
           y - PWX_CROSS_SIZE < clip.y_max)) {
         fBlankPage = fFalse;
      }
   }
}

void
svxPrintout::SetFont(int fontcode)
{
    switch (fontcode) {
        case PR_FONT_DEFAULT:
            current_font = font_default;
            break;
        case PR_FONT_LABELS:
            current_font = font_labels;
            break;
        default:
            BUG("unknown font code");
    }
}

void
svxPrintout::SetColour(int colourcode)
{
    switch (colourcode) {
        case PR_COLOUR_TEXT:
            pdc->SetTextForeground(colour_text);
            break;
        case PR_COLOUR_LABELS:
            pdc->SetTextForeground(colour_labels);
            pdc->SetBackgroundMode(wxTRANSPARENT);
            break;
        case PR_COLOUR_FRAME:
            pdc->SetPen(*pen_frame);
            break;
        case PR_COLOUR_LEG:
            pdc->SetPen(*pen_leg);
            break;
        case PR_COLOUR_CROSS:
            pdc->SetPen(*pen_cross);
            break;
        case PR_COLOUR_SURFACE_LEG:
            pdc->SetPen(*pen_surface_leg);
            break;
        default:
            BUG("unknown colour code");
    }
}

void
svxPrintout::WriteString(const wxString & s)
{
    double xsc, ysc;
    pdc->GetUserScale(&xsc, &ysc);
    pdc->SetUserScale(xsc * font_scaling_x, ysc * font_scaling_y);
    pdc->SetFont(*current_font);
    int w, h;
    if (cur_pass != -1) {
        pdc->GetTextExtent(wxT("My"), &w, &h);
        pdc->DrawText(s,
                      long(x_t / font_scaling_x),
                      long(y_t / font_scaling_y) - h);
    } else {
        pdc->GetTextExtent(s, &w, &h);
        if ((y_t + h > 0 && y_t - h < clip.y_max - clip.y_min) ||
            (x_t < clip.x_max - clip.x_min && x_t + w > 0)) {
            fBlankPage = fFalse;
        }
    }
    pdc->SetUserScale(xsc, ysc);
}

void
svxPrintout::DrawEllipse(long x, long y, long r, long R)
{
    /* Don't need to check in first-pass - circle is only used in title box */
    if (cur_pass != -1) {
        x_t = x_offset + x - clip.x_min;
        y_t = y_offset + clip.y_max - y;
        const wxBrush & save_brush = pdc->GetBrush();
        pdc->SetBrush(*wxTRANSPARENT_BRUSH);
        pdc->DrawEllipse(x_t - r, y_t - R, 2 * r, 2 * R);
        pdc->SetBrush(save_brush);
    }
}

void
svxPrintout::SolidRectangle(long x, long y, long w, long h)
{
    long X = x_offset + x - clip.x_min;
    long Y = y_offset + clip.y_max - y;
    pdc->SetBrush(*wxBLACK_BRUSH);
    pdc->DrawRectangle(X, Y - h, w, h);
}

int
svxPrintout::Pre()
{
    font_labels = new wxFont(fontsize_labels, wxDEFAULT, wxNORMAL, wxNORMAL,
                             false, wxString(fontname_labels, wxConvUTF8),
                             wxFONTENCODING_ISO8859_1);
    font_default = new wxFont(fontsize, wxDEFAULT, wxNORMAL, wxNORMAL,
                              false, wxString(fontname, wxConvUTF8),
                              wxFONTENCODING_ISO8859_1);
    current_font = font_default;
    pen_leg = new wxPen(colour_leg);
    pen_surface_leg = new wxPen(colour_surface_leg);
    pen_cross = new wxPen(colour_cross);
    pen_frame = new wxPen(colour_frame);
    return 1; /* only need 1 pass */
}

void
svxPrintout::NewPage(int pg, int pagesX, int pagesY)
{
    int x, y;
    x = (pg - 1) % pagesX;
    y = pagesY - 1 - ((pg - 1) / pagesX);

    clip.x_min = (long)x * xpPageWidth;
    clip.y_min = (long)y * ypPageDepth;
    clip.x_max = clip.x_min + xpPageWidth; /* dm/pcl/ps had -1; */
    clip.y_max = clip.y_min + ypPageDepth; /* dm/pcl/ps had -1; */

    //we have to write the footer here. PostScript is being weird. Really weird.
    pdc->SetFont(*font_labels);
    MoveTo(clip.x_min, clip.y_min - (long)(7 * m_layout->scY));
    wxString footer;
    footer.Printf(m_layout->footer,
                  m_layout->title.c_str(),
                  pg,
                  m_layout->pagesX * m_layout->pagesY,
                  m_layout->datestamp.c_str());
    WriteString(footer);
    pdc->DestroyClippingRegion();
    drawticks(clip, (int)(9 * m_layout->scX / POINTS_PER_MM), x, y);
}

void
svxPrintout::PlotLR(const vector<XSect> & centreline)
{
    assert(centreline.size() > 1);
    XSect prev_pt_v;
    Vector3 last_right(1.0, 0.0, 0.0);

    const double Sc = 1000 / m_layout->Scale;
    const double SIN = sin(rad(m_layout->rot));
    const double COS = cos(rad(m_layout->rot));

    vector<XSect>::const_iterator i = centreline.begin();
    vector<XSect>::size_type segment = 0;
    while (i != centreline.end()) {
        // get the coordinates of this vertex
        const XSect & pt_v = *i++;

        Vector3 right;

        const Vector3 up_v(0.0, 0.0, 1.0);

        if (segment == 0) {
            assert(i != centreline.end());
            // first segment

            // get the coordinates of the next vertex
            const XSect & next_pt_v = *i;

            // calculate vector from this pt to the next one
            Vector3 leg_v = next_pt_v - pt_v;

            // obtain a vector in the LRUD plane
            right = leg_v * up_v;
            if (right.magnitude() == 0) {
                right = last_right;
            } else {
                last_right = right;
            }
        } else if (segment + 1 == centreline.size()) {
            // last segment

            // Calculate vector from the previous pt to this one.
            Vector3 leg_v = pt_v - prev_pt_v;

            // Obtain a horizontal vector in the LRUD plane.
            right = leg_v * up_v;
            if (right.magnitude() == 0) {
                right = Vector3(last_right.GetX(), last_right.GetY(), 0.0);
            } else {
                last_right = right;
            }
        } else {
            assert(i != centreline.end());
            // Intermediate segment.

            // Get the coordinates of the next vertex.
            const XSect & next_pt_v = *i;

            // Calculate vectors from this vertex to the
            // next vertex, and from the previous vertex to
            // this one.
            Vector3 leg1_v = pt_v - prev_pt_v;
            Vector3 leg2_v = next_pt_v - pt_v;

            // Obtain horizontal vectors perpendicular to
            // both legs, then normalise and average to get
            // a horizontal bisector.
            Vector3 r1 = leg1_v * up_v;
            Vector3 r2 = leg2_v * up_v;
            r1.normalise();
            r2.normalise();
            right = r1 + r2;
            if (right.magnitude() == 0) {
                // This is the "mid-pitch" case...
                right = last_right;
            }
            last_right = right;
        }

        // Scale to unit vectors in the LRUD plane.
        right.normalise();

        Double l = pt_v.GetL();
        Double r = pt_v.GetR();

        if (l >= 0) {
            Vector3 p = pt_v - right * l;
            double X = p.GetX() * COS - p.GetY() * SIN;
            double Y = (p.GetX() * SIN + p.GetY() * COS);
            long x = (long)((X * Sc + m_layout->xOrg) * m_layout->scX);
            long y = (long)((Y * Sc + m_layout->yOrg) * m_layout->scY);
            MoveTo(x - PWX_CROSS_SIZE, y - PWX_CROSS_SIZE);
            DrawTo(x, y);
            DrawTo(x - PWX_CROSS_SIZE, y + PWX_CROSS_SIZE);
        }
        if (r >= 0) {
            Vector3 p = pt_v + right * r;
            double X = p.GetX() * COS - p.GetY() * SIN;
            double Y = (p.GetX() * SIN + p.GetY() * COS);
            long x = (long)((X * Sc + m_layout->xOrg) * m_layout->scX);
            long y = (long)((Y * Sc + m_layout->yOrg) * m_layout->scY);
            MoveTo(x + PWX_CROSS_SIZE, y - PWX_CROSS_SIZE);
            DrawTo(x, y);
            DrawTo(x + PWX_CROSS_SIZE, y + PWX_CROSS_SIZE);
        }

        prev_pt_v = pt_v;

        ++segment;
    }
}

void
svxPrintout::PlotUD(const vector<XSect> & centreline)
{
    assert(centreline.size() > 1);
    const double Sc = 1000 / m_layout->Scale;

    vector<XSect>::const_iterator i = centreline.begin();
    while (i != centreline.end()) {
        // get the coordinates of this vertex
        const XSect & pt_v = *i++;

        Double u = pt_v.GetU();
        Double d = pt_v.GetD();

        if (u >= 0 || d >= 0) {
            Vector3 p = pt_v;
            double SIN = sin(rad(m_layout->rot));
            double COS = cos(rad(m_layout->rot));
            double X = p.GetX() * COS - p.GetY() * SIN;
            double Y = p.GetZ();
            long x = (long)((X * Sc + m_layout->xOrg) * m_layout->scX);
            if (u >= 0) {
                long y = (long)(((Y + u) * Sc + m_layout->yOrg) * m_layout->scY);
                MoveTo(x - PWX_CROSS_SIZE, y + PWX_CROSS_SIZE);
                DrawTo(x, y);
                DrawTo(x + PWX_CROSS_SIZE, y + PWX_CROSS_SIZE);
            }
            if (d >= 0) {
                long y = (long)(((Y - d) * Sc + m_layout->yOrg) * m_layout->scY);
                MoveTo(x - PWX_CROSS_SIZE, y - PWX_CROSS_SIZE);
                DrawTo(x, y);
                DrawTo(x + PWX_CROSS_SIZE, y - PWX_CROSS_SIZE);
            }
        }
    }
}

static wxColour
to_rgb(const char *var, char *val)
{
   unsigned long rgb;
   if (!val) return *wxBLACK;
   rgb = as_colour(var, val);
   return wxColour((rgb & 0xff0000) >> 16, (rgb & 0xff00) >> 8, rgb & 0xff);
}

/* Initialise printer routines */
char *
svxPrintout::Init(FILE **fh_list, bool fCalibrate)
{
   static const char *vars[] = {
      "font_size_labels",
      "colour_text",
      "colour_labels",
      "colour_frame",
      "colour_legs",
      "colour_crosses",
      "colour_surface_legs",
      NULL
   };
   char **vals;

   (void)fCalibrate; /* suppress unused argument warning */

   vals = ini_read(fh_list, "aven", vars);
   fontsize_labels = 10;
   if (vals[0]) fontsize_labels = as_int(vars[0], vals[0], 1, INT_MAX);
   fontsize = 10;

   colour_text = colour_labels = colour_frame = colour_leg = colour_cross = colour_surface_leg = *wxBLACK;
   if (vals[1]) colour_text = to_rgb(vars[1], vals[1]);
   if (vals[2]) colour_labels = to_rgb(vars[2], vals[2]);
   if (vals[3]) colour_frame = to_rgb(vars[3], vals[3]);
   if (vals[4]) colour_leg = to_rgb(vars[4], vals[4]);
   if (vals[5]) colour_cross = to_rgb(vars[5], vals[5]);
   if (vals[6]) colour_surface_leg = to_rgb(vars[6], vals[6]);
   m_layout->scX = 1;
   m_layout->scY = 1;
   return NULL;
}