live_effects/parameter/filletchamferpointarray.cpp

/*
 * Copyright (C) Jabiertxo Arraiza Cenoz <jabier.arraiza@marker.es>
 * Special thanks to Johan Engelen for the base of the effect -powerstroke-
 * Also to ScislaC for point me to the idea
 * Also su_v for his construvtive feedback and time
 * and finaly to Liam P. White for his big help on coding, that save me a lot of
 * hours
 * Released under GNU GPL, read the file 'COPYING' for more information
 */

#include <2geom/piecewise.h>
#include <2geom/sbasis-to-bezier.h>
#include <2geom/sbasis-geometric.h>
#include <2geom/line.h>
#include <2geom/path-intersection.h>

#include "ui/dialog/lpe-fillet-chamfer-properties.h"
#include "live_effects/parameter/filletchamferpointarray.h"
#include "live_effects/effect.h"
#include "svg/svg.h"
#include "svg/stringstream.h"
#include "knotholder.h"
#include "sp-lpe-item.h"
#include "selection.h"

// needed for on-canvas editting:
#include "desktop.h"
#include "live_effects/lpeobject.h"
#include "helper/geom-nodetype.h"
#include "helper/geom-curves.h"
#include "ui/tools/node-tool.h"

// TODO due to internal breakage in glibmm headers,
// this has to be included last.
#include <glibmm/i18n.h>


using namespace Geom;

namespace Inkscape {

namespace LivePathEffect {

FilletChamferPointArrayParam::FilletChamferPointArrayParam(
    const Glib::ustring &label, const Glib::ustring &tip,
    const Glib::ustring &key, Inkscape::UI::Widget::Registry *wr,
    Effect *effect)
    : ArrayParam<Point>(label, tip, key, wr, effect, 0)
{
    knot_shape = SP_KNOT_SHAPE_DIAMOND;
    knot_mode = SP_KNOT_MODE_XOR;
    knot_color = 0x00ff0000;
}

FilletChamferPointArrayParam::~FilletChamferPointArrayParam() {}

Gtk::Widget *FilletChamferPointArrayParam::param_newWidget()
{
    return NULL;
    /*
          Inkscape::UI::Widget::RegisteredTransformedPoint * pointwdg =
        Gtk::manage(
              new Inkscape::UI::Widget::RegisteredTransformedPoint(
        param_label,
                                                                    param_tooltip,
                                                                    param_key,
                                                                    *param_wr,
                                                                    param_effect->getRepr(),
                                                                    param_effect->getSPDoc()
        ) );
          // TODO: fix to get correct desktop (don't use SP_ACTIVE_DESKTOP)
          SPDesktop *desktop = SP_ACTIVE_DESKTOP;
          Affine transf = desktop->doc2dt();
          pointwdg->setTransform(transf);
          pointwdg->setValue( *this );
          pointwdg->clearProgrammatically();
          pointwdg->set_undo_parameters(SP_VERB_DIALOG_LIVE_PATH_EFFECT,
        _("Change point parameter"));

          Gtk::HBox * hbox = Gtk::manage( new Gtk::HBox() );
          static_cast<Gtk::HBox*>(hbox)->pack_start(*pointwdg, true, true);
          static_cast<Gtk::HBox*>(hbox)->show_all_children();

          return dynamic_cast<Gtk::Widget *> (hbox);
      */
}

void
FilletChamferPointArrayParam::param_transform_multiply(Affine const &postmul,
        bool /*set*/)
{
    Inkscape::Preferences *prefs = Inkscape::Preferences::get();

    if (prefs->getBool("/options/transform/rectcorners", true) &&
            _vector[1][X] <= 0) {
        std::vector<Geom::Point> result;
        for (std::vector<Point>::const_iterator point_it = _vector.begin();
                point_it != _vector.end(); ++point_it) {
            Coord A =
                (*point_it)[X] * ((postmul.expansionX() + postmul.expansionY()) / 2);
            result.push_back(Point(A, (*point_it)[Y]));
        }
        param_set_and_write_new_value(result);
    }

    //    param_set_and_write_new_value( (*this) * postmul );
}

/** call this method to recalculate the controlpoints such that they stay at the
 * same location relative to the new path. Useful after adding/deleting nodes to
 * the path.*/
void FilletChamferPointArrayParam::recalculate_controlpoints_for_new_pwd2(
    Piecewise<D2<SBasis> > const &pwd2_in)
{
    if (!last_pwd2.empty()) {
        PathVector const pathv =
            path_from_piecewise(remove_short_cuts(pwd2_in, 0.1), 0.001);
        PathVector last_pathv =
            path_from_piecewise(remove_short_cuts(last_pwd2, 0.1), 0.001);
        std::vector<Point> result;
        unsigned long counter = 0;
        unsigned long counterPaths = 0;
        unsigned long counterCurves = 0;
        long offset = 0;
        long offsetPaths = 0;
        Geom::NodeType nodetype;
        for (PathVector::const_iterator path_it = pathv.begin();
                path_it != pathv.end(); ++path_it) {
            if (path_it->empty()) {
                counterPaths++;
                counter++;
                continue;
            }
            Geom::Path::const_iterator curve_it1 = path_it->begin();
            Geom::Path::const_iterator curve_it2 = ++(path_it->begin());
            Geom::Path::const_iterator curve_endit = path_it->end_default();
            if (path_it->closed() && path_it->back_closed().isDegenerate()) {
                const Curve &closingline = path_it->back_closed();
                if (are_near(closingline.initialPoint(), closingline.finalPoint())) {
                    curve_endit = path_it->end_open();
                }
            }
            counterCurves = 0;
            while (curve_it1 != curve_endit) {
                //if start a path get node type
                if (counterCurves == 0) {
                    if (path_it->closed()) {
                        if (path_it->back_closed().isDegenerate()) {
                            nodetype = get_nodetype(path_it->back_open(), *curve_it1);
                        } else {
                            nodetype = get_nodetype(path_it->back_closed(), *curve_it1);
                        }
                    } else {
                        nodetype = NODE_NONE;
                    }
                } else {
                    //check node type also whith straight lines because get_nodetype
                    //return non cusp node in a node inserted inside a straight line
                    //todo: if the path remove some nodes whith the result of a straight
                    //line but with handles, the node inserted into dont fire the knot
                    // because is not handle as cusp node by  get_nodetype function
                    bool next_is_line = is_straight_curve(*curve_it1);
                    bool this_is_line = is_straight_curve((*path_it)[counterCurves - 1]);
                    nodetype = get_nodetype((*path_it)[counterCurves - 1], *curve_it1);
                    if (this_is_line || next_is_line) {
                        nodetype = NODE_CUSP;
                    }
                }
                if (last_pathv.size() > pathv.size() ||
                        (last_pathv.size() > counterPaths &&
                        last_pathv[counterPaths].size() > counter - offset &&
                         !are_near(curve_it1->initialPoint(),
                                   last_pathv[counterPaths][counter - offset].initialPoint(),
                                   0.1))) {
                    if ( curve_it2 == curve_endit) {
                        if (last_pathv[counterPaths].size() != pathv[counterPaths].size()) {
                            offset = (last_pathv[counterPaths].size() - pathv[counterPaths].size()) * -1;
                        } else {
                            offset = 0;
                        }
                        offsetPaths += offset;
                        offset = offsetPaths;
                    } else if (counterCurves == 0 && last_pathv.size() <= pathv.size() &&
                            counter - offset <= last_pathv[counterPaths].size() &&
                            are_near(curve_it1->initialPoint(),
                                     last_pathv[counterPaths].finalPoint(), 0.1) &&
                                     !last_pathv[counterPaths].closed()) {
                        long e = counter - offset + 1;
                        std::vector<Point> tmp = _vector;
                        for (unsigned long i =
                                     last_pathv[counterPaths].size() + counter - offset;
                                i > counterCurves - offset + 1; i--) {

                            if (tmp[i - 1][X] > 0) {
                                double fractpart, intpart;
                                fractpart = modf(tmp[i - 1][X], &intpart);
                                _vector[e] = Point(e + fractpart, tmp[i - 1][Y]);
                            } else {
                                _vector[e] = Point(tmp[i - 1][X], tmp[i - 1][Y]);
                            }
                            e++;
                        }
                        //delete temp vector
                        std::vector<Point>().swap(tmp);
                        if (last_pathv.size() > counterPaths) {
                            last_pathv[counterPaths] = last_pathv[counterPaths].reversed();
                        }
                    } else {
                        if (last_pathv.size() > counterPaths) {
                            if (last_pathv[counterPaths].size() <
                                    pathv[counterPaths].size()) {
                                offset++;
                            } else if (last_pathv[counterPaths].size() >
                                       pathv[counterPaths].size()) {
                                offset--;
                                continue;
                            }
                        } else {
                            offset++;
                        }
                    }
                    double xPos = 0;
                    if (_vector[1][X] > 0) {
                        xPos = nearest_time(curve_it1->initialPoint(), pwd2_in);
                    }
                    if (nodetype == NODE_CUSP) {
                        result.push_back(Point(xPos, 1));
                    } else {
                        result.push_back(Point(xPos, 0));
                    }
                } else {
                    double xPos = _vector[counter - offset][X];
                    if (_vector.size() <= (unsigned)(counter - offset)) {
                        if (_vector[1][X] > 0) {
                            xPos = nearest_time(curve_it1->initialPoint(), pwd2_in);
                        } else {
                            xPos = 0;
                        }
                    }
                    if (nodetype == NODE_CUSP) {
                        double vectorY = _vector[counter - offset][Y];
                        if (_vector.size() <= (unsigned)(counter - offset) || vectorY == 0) {
                            vectorY = 1;
                        }
                        result.push_back(Point(xPos, vectorY));
                    } else {
                        if (_vector[1][X] < 0) {
                            xPos = 0;
                        }
                        result.push_back(Point(floor(xPos), 0));
                    }
                }
                ++curve_it1;
                if (curve_it2 != curve_endit) {
                    ++curve_it2;
                }
                counter++;
                counterCurves++;
            }
            counterPaths++;
        }
        _vector = result;
        write_to_SVG();
    }
}

void FilletChamferPointArrayParam::recalculate_knots(
    Piecewise<D2<SBasis> > const &pwd2_in)
{
    bool change = false;
    if(_vector.size() == 0){
        return;
    }
    PathVector pathv = path_from_piecewise(pwd2_in, 0.001);
    if (!pathv.empty()) {
        std::vector<Point> result;
        int counter = 0;
        int counterCurves = 0;
        Geom::NodeType nodetype;
        for (PathVector::const_iterator path_it = pathv.begin();
                path_it != pathv.end(); ++path_it) {
            if (path_it->empty()) {
                counter++;
                continue;
            }
            Geom::Path::const_iterator curve_it1 = path_it->begin();
            Geom::Path::const_iterator curve_it2 = ++(path_it->begin());
            Geom::Path::const_iterator curve_endit = path_it->end_default();
            if (path_it->closed() && path_it->back_closed().isDegenerate()) {
                const Curve &closingline = path_it->back_closed();
                if (are_near(closingline.initialPoint(), closingline.finalPoint())) {
                    curve_endit = path_it->end_open();
                }
            }
            counterCurves = 0;
            while (curve_it1 != curve_endit) {
                //if start a path get node type
                if (counterCurves == 0) {
                    if (path_it->closed()) {
                        if (path_it->back_closed().isDegenerate()) {
                            nodetype = get_nodetype(path_it->back_open(), *curve_it1);
                        } else {
                            nodetype = get_nodetype(path_it->back_closed(), *curve_it1);
                        }
                    } else {
                        nodetype = NODE_NONE;
                    }
                } else {
                    bool next_is_line = is_straight_curve(*curve_it1);
                    bool this_is_line = is_straight_curve((*path_it)[counterCurves - 1]);
                    nodetype = get_nodetype((*path_it)[counterCurves - 1], *curve_it1);
                    if (this_is_line || next_is_line) {
                        nodetype = NODE_CUSP;
                    }
                }
                if (nodetype == NODE_CUSP) {
                    double vectorY = _vector[counter][Y];
                    if (vectorY == 0) {
                        vectorY = 1;
                        change = true;
                    }
                    result.push_back(Point(_vector[counter][X], vectorY));
                } else {
                    double xPos = floor(_vector[counter][X]);
                    if (_vector[1][X] < 0) {
                        xPos = 0;
                    }
                    double vectorY = _vector[counter][Y];
                    if (vectorY != 0) {
                        change = true;
                    }
                    result.push_back(Point(xPos, 0));
                }
                ++curve_it1;
                counter++;
                if (curve_it2 != curve_endit) {
                    ++curve_it2;
                }
                counterCurves++;
            }
        }
        if (change) {
            _vector = result;
            write_to_SVG();
        }
    }
}

void FilletChamferPointArrayParam::set_pwd2(
    Piecewise<D2<SBasis> > const &pwd2_in,
    Piecewise<D2<SBasis> > const &pwd2_normal_in)
{
    last_pwd2 = pwd2_in;
    last_pwd2_normal = pwd2_normal_in;
}

void FilletChamferPointArrayParam::set_helper_size(int hs)
{
    helper_size = hs;
}

void FilletChamferPointArrayParam::set_chamfer_steps(int value_chamfer_steps)
{
    chamfer_steps = value_chamfer_steps;
}

void FilletChamferPointArrayParam::set_use_distance(bool use_knot_distance )
{
    use_distance = use_knot_distance;
}

void FilletChamferPointArrayParam::updateCanvasIndicators()
{
    std::vector<Point> ts = data();
    hp.clear();
    unsigned int i = 0;
    for (std::vector<Point>::const_iterator point_it = ts.begin();
            point_it != ts.end(); ++point_it) {
        double Xvalue = to_time(i, (*point_it)[X]) -i;
        if (Xvalue == 0) {
            i++;
            continue;
        }
        Geom::Point ptA = last_pwd2[i].valueAt(Xvalue);
        Geom::Point derivA = unit_vector(derivative(last_pwd2[i]).valueAt(Xvalue));
        Geom::Rotate rot(Geom::Rotate::from_degrees(-90));
        derivA = derivA * rot;
        Geom::Point C = ptA - derivA * helper_size;
        Geom::Point D = ptA + derivA * helper_size;
        Geom::Ray ray1(C, D);
        char const * svgd = "M 1,0.25 0.5,0 1,-0.25 M 1,0.5 0,0 1,-0.5";
        Geom::PathVector pathv = sp_svg_read_pathv(svgd);
        Geom::Affine aff = Geom::Affine();
        aff *= Geom::Scale(helper_size);
        aff *= Geom::Rotate(ray1.angle() - rad_from_deg(270));
        aff *= Geom::Translate(last_pwd2[i].valueAt(Xvalue));
        pathv *= aff;
        hp.push_back(pathv[0]);
        hp.push_back(pathv[1]);
        i++;
    }
}

void FilletChamferPointArrayParam::addCanvasIndicators(
    SPLPEItem const */*lpeitem*/, std::vector<Geom::PathVector> &hp_vec)
{
    hp_vec.push_back(hp);
}

double FilletChamferPointArrayParam::rad_to_len(int index, double rad)
{
    double len = 0;
    Geom::PathVector subpaths = path_from_piecewise(last_pwd2, 0.1);
    std::pair<std::size_t, std::size_t> positions = get_positions(index, subpaths);
    D2<SBasis> A = last_pwd2[last_index(index, subpaths)];
    if(positions.second != 0){
        A = last_pwd2[index-1];
    }else{
        if(!subpaths[positions.first].closed()){
            return len;
        }
    }
    D2<SBasis> B = last_pwd2[index];
    Piecewise<D2<SBasis> > offset_curve0 = Piecewise<D2<SBasis> >(A)+rot90(unitVector(derivative(A)))*(rad);
    Piecewise<D2<SBasis> > offset_curve1 = Piecewise<D2<SBasis> >(B)+rot90(unitVector(derivative(B)))*(rad);
    Geom::Path p0 = path_from_piecewise(offset_curve0, 0.1)[0];
    Geom::Path p1 = path_from_piecewise(offset_curve1, 0.1)[0];
    Geom::Crossings cs = Geom::crossings(p0, p1);
    if(cs.size() > 0){
        Point cp =p0(cs[0].ta);
        double p0pt = nearest_time(cp, B);
        len = time_to_len(index,p0pt);
    } else {
        if(rad < 0){
            len = rad_to_len(index, rad * -1);
        }
    }
    return len;
}

double FilletChamferPointArrayParam::len_to_rad(int index, double len)
{
    double rad = 0;
    double tmp_len = _vector[index][X];
    _vector[index] = Geom::Point(len,_vector[index][Y]);
    Geom::PathVector subpaths = path_from_piecewise(last_pwd2, 0.1);
    std::pair<std::size_t, std::size_t> positions = get_positions(index, subpaths);
    Piecewise<D2<SBasis> > u;
    u.push_cut(0);
    u.push(last_pwd2[last_index(index, subpaths)], 1);
    Geom::Curve * A = path_from_piecewise(u, 0.1)[0][0].duplicate();
    Geom::Curve * B = subpaths[positions.first][positions.second].duplicate();
    std::vector<double> times;
    if(positions.second != 0){
        A = subpaths[positions.first][positions.second-1].duplicate();
        times = get_times(index-1, subpaths, false);
    }else{
        if(!subpaths[positions.first].closed()){
            return rad;
        }
        times = get_times(last_index(index, subpaths), subpaths, true);
    }
    _vector[index] = Geom::Point(tmp_len,_vector[index][Y]);
    Geom::Point startArcPoint = A->toSBasis().valueAt(times[1]);
    Geom::Point endArcPoint = B->toSBasis().valueAt(times[2]);
    Curve *knotCurve1 = A->portion(times[0], times[1]);
    Curve *knotCurve2 = B->portion(times[2], 1);
    Geom::CubicBezier const *cubic1 = dynamic_cast<Geom::CubicBezier const *>(knotCurve1);
    Ray ray1(startArcPoint, A->finalPoint());
    if (cubic1) {
        ray1.setPoints((*cubic1)[2], startArcPoint);
    }
    Geom::CubicBezier const *cubic2 = dynamic_cast<Geom::CubicBezier const *>(knotCurve2);
    Ray ray2(B->initialPoint(), endArcPoint);
    if (cubic2) {
        ray2.setPoints(endArcPoint, (*cubic2)[1]);
    }
    bool ccwToggle = cross(A->finalPoint() - startArcPoint, endArcPoint - startArcPoint) > 0;
    double distanceArc = Geom::distance(startArcPoint,middle_point(startArcPoint,endArcPoint));
    double angleBetween = angle_between(ray1, ray2, ccwToggle);
    rad = distanceArc/sin(angleBetween/2.0);
    return rad * -1;
}

std::vector<double> FilletChamferPointArrayParam::get_times(int index, Geom::PathVector subpaths, bool last)
{
    const double tolerance = 0.001;
    const double gapHelper = 0.00001;
    std::pair<std::size_t, std::size_t> positions = get_positions(index, subpaths);
    Curve *curve_it1;
    curve_it1 = subpaths[positions.first][positions.second].duplicate();
    Coord it1_length = (*curve_it1).length(tolerance);
    double time_it1, time_it2, time_it1_B, intpart;
    if (static_cast<int>(_vector.size()) <= index){
        std::vector<double> out;
        out.push_back(0);
        out.push_back(1);
        out.push_back(0);
        return out;
    }
    time_it1 = modf(to_time(index, _vector[index][X]), &intpart);
    if (_vector[index][Y] == 0) {
        time_it1 = 0;
    }
    double resultLenght = 0;
    if (subpaths[positions.first].closed() && last) {
        time_it2 = modf(to_time(index - positions.second , _vector[index - positions.second ][X]), &intpart);
        resultLenght = it1_length + to_len(index - positions.second, _vector[index - positions.second ][X]);
    } else if (!subpaths[positions.first].closed() && last){
        time_it2 = 0;
        resultLenght = 0;
    } else {
        time_it2 = modf(to_time(index + 1, _vector[index + 1][X]), &intpart);
        resultLenght = it1_length + to_len( index + 1, _vector[index + 1][X]);
    }
    if (resultLenght > 0 && time_it2 != 0) {
        time_it1_B = modf(to_time(index, -resultLenght), &intpart);
    } else {
        if (time_it2 == 0) {
            time_it1_B = 1;
        } else {
            time_it1_B = gapHelper;
        }
    }

    if ((subpaths[positions.first].closed() && last && _vector[index - positions.second][Y] == 0) || (subpaths[positions.first].size() > positions.second + 1 && _vector[index + 1][Y] == 0)) {
        time_it1_B = 1;
        time_it2 = 0;
    }
    if (time_it1_B < time_it1) {
        time_it1_B = time_it1 + gapHelper;
    }
    std::vector<double> out;
    out.push_back(time_it1);
    out.push_back(time_it1_B);
    out.push_back(time_it2);
    return out;
}

std::pair<std::size_t, std::size_t> FilletChamferPointArrayParam::get_positions(int index, Geom::PathVector subpaths)
{
    int counter = -1;
    std::size_t first = 0;
    std::size_t second = 0;
    for (PathVector::const_iterator path_it = subpaths.begin(); path_it != subpaths.end(); ++path_it) {
        if (path_it->empty())
            continue;
        Geom::Path::const_iterator curve_it1 = path_it->begin();
        Geom::Path::const_iterator curve_endit = path_it->end_default();
        if (path_it->closed()) {
          const Geom::Curve &closingline = path_it->back_closed();
          // the closing line segment is always of type
          // Geom::LineSegment.
          if (are_near(closingline.initialPoint(), closingline.finalPoint())) {
            // closingline.isDegenerate() did not work, because it only checks for
            // *exact* zero length, which goes wrong for relative coordinates and
            // rounding errors...
            // the closing line segment has zero-length. So stop before that one!
            curve_endit = path_it->end_open();
          }
        }
        first++;
        second = 0;
        while (curve_it1 != curve_endit) {
            counter++;
            second++;
            if(counter == index){
                break;
            }
            ++curve_it1;
        }
        if(counter == index){
            break;
        }
    }
    first--;
    second--;
    std::pair<std::size_t, std::size_t> out(first, second);
    return out;
}

int FilletChamferPointArrayParam::last_index(int index, Geom::PathVector subpaths)
{
    int counter = -1;
    bool inSubpath = false;
    for (PathVector::const_iterator path_it = subpaths.begin(); path_it != subpaths.end(); ++path_it) {
        if (path_it->empty())
            continue;
        Geom::Path::const_iterator curve_it1 = path_it->begin();
        Geom::Path::const_iterator curve_endit = path_it->end_default();
        if (path_it->closed()) {
          const Geom::Curve &closingline = path_it->back_closed();
          if (are_near(closingline.initialPoint(), closingline.finalPoint())) {
            curve_endit = path_it->end_open();
          }
        }
        while (curve_it1 != curve_endit) {
            counter++;
            if(counter == index){
                inSubpath = true;
            }
            ++curve_it1;
        }
        if(inSubpath){
            break;
        }
    }
    if(!inSubpath){
        counter = -1;
    }
    return counter;
}


double FilletChamferPointArrayParam::len_to_time(int index, double len)
{
    double t = 0;
    if (last_pwd2.size() > (unsigned) index) {
        if (len != 0) {
            if (last_pwd2[index][0].degreesOfFreedom() != 2) {
                Piecewise<D2<SBasis> > u;
                u.push_cut(0);
                u.push(last_pwd2[index], 1);
                std::vector<double> t_roots = roots(arcLengthSb(u) - std::abs(len));
                if (t_roots.size() > 0) {
                    t = t_roots[0];
                }
            } else {
                double lenghtPart = 0;
                if (last_pwd2.size() > (unsigned) index) {
                    lenghtPart = length(last_pwd2[index], EPSILON);
                }
                if (std::abs(len) < lenghtPart && lenghtPart != 0) {
                    t = std::abs(len) / lenghtPart;
                }
            }
        }
        t = double(index) + t;
    } else {
        t = double(last_pwd2.size() - 1);
    }

    return t;
}

double FilletChamferPointArrayParam::time_to_len(int index, double time)
{
    double intpart;
    double len = 0;
    time = modf(time, &intpart);
    double lenghtPart = 0;
    if (last_pwd2.size() <= (unsigned) index || time == 0) {
        return len;
    }
    if (last_pwd2[index][0].degreesOfFreedom() != 2) {
        Piecewise<D2<SBasis> > u;
        u.push_cut(0);
        u.push(last_pwd2[index], 1);
        u = portion(u, 0, time);
        return length(u, 0.001) * -1;
    }
    lenghtPart = length(last_pwd2[index], EPSILON);
    return (time * lenghtPart) * -1;
}

double FilletChamferPointArrayParam::to_time(int index, double A)
{
    if (A > 0) {
        return A;
    } else {
        return len_to_time(index, A);
    }
}

double FilletChamferPointArrayParam::to_len(int index, double A)
{
    if (A > 0) {
        return time_to_len(index, A);
    } else {
        return A;
    }
}

void FilletChamferPointArrayParam::set_oncanvas_looks(SPKnotShapeType shape,
        SPKnotModeType mode,
        guint32 color)
{
    knot_shape = shape;
    knot_mode = mode;
    knot_color = color;
}

FilletChamferPointArrayParamKnotHolderEntity::
FilletChamferPointArrayParamKnotHolderEntity(
    FilletChamferPointArrayParam *p, unsigned int index)
    : _pparam(p), _index(index) {}

void FilletChamferPointArrayParamKnotHolderEntity::knot_set(Point const &p,
                                                            Point const &/*origin*/,
                                                            guint state)
{
    using namespace Geom;

    if (!valid_index(_index)) {
        return;
    }
    Piecewise<D2<SBasis> > const &pwd2 = _pparam->get_pwd2();
    double t = nearest_time(p, pwd2[_index]);
    Geom::Point const s = snap_knot_position(pwd2[_index].valueAt(t), state);
    t = nearest_time(s, pwd2[_index]);
    if (t == 1) {
        t = 0.9999;
    }
    t += _index;

    if (_pparam->_vector.at(_index)[X] <= 0) {
        _pparam->_vector.at(_index) =
            Point(_pparam->time_to_len(_index, t), _pparam->_vector.at(_index)[Y]);
    } else {
        _pparam->_vector.at(_index) = Point(t, _pparam->_vector.at(_index)[Y]);
    }
    sp_lpe_item_update_patheffect(SP_LPE_ITEM(item), false, false);
}

Point FilletChamferPointArrayParamKnotHolderEntity::knot_get() const
{
    using namespace Geom;

    if (!valid_index(_index)) {
        return Point(infinity(), infinity());
    }

    Piecewise<D2<SBasis> > const &pwd2 = _pparam->get_pwd2();

    double time_it = _pparam->to_time(_index, _pparam->_vector.at(_index)[X]);
    Point canvas_point = pwd2.valueAt(time_it);

    _pparam->updateCanvasIndicators();
    return canvas_point;

}

void FilletChamferPointArrayParamKnotHolderEntity::knot_click(guint state)
{
    if (state & GDK_CONTROL_MASK) {
        if (state & GDK_MOD1_MASK) {
            _pparam->_vector.at(_index) = Point(_index, _pparam->_vector.at(_index)[Y]);
            _pparam->param_set_and_write_new_value(_pparam->_vector);
            sp_lpe_item_update_patheffect(SP_LPE_ITEM(item), false, false);
        }else{
            using namespace Geom;
            int type = (int)_pparam->_vector.at(_index)[Y];
            if (type >=3000 && type < 4000){
                type = 3;
            }
            if (type >=4000 && type < 5000){
                type = 4;
            }
            switch(type){
                case 1:
                    type = 2;
                    break;
                case 2:
                    type =  _pparam->chamfer_steps + 3000;
                    break;
                case 3:
                    type =  _pparam->chamfer_steps + 4000;
                    break;
                default:
                    type = 1;
                    break;
            }
            _pparam->_vector.at(_index) = Point(_pparam->_vector.at(_index)[X], (double)type);
            _pparam->param_set_and_write_new_value(_pparam->_vector);
            sp_lpe_item_update_patheffect(SP_LPE_ITEM(item), false, false);
            const gchar *tip;
            if (type >=3000 && type < 4000){
                 tip = _("<b>Chamfer</b>: <b>Ctrl+Click</b> toggle type, "
                        "<b>Shift+Click</b> open dialog, "
                        "<b>Ctrl+Alt+Click</b> reset");
            } else if (type >=4000 && type < 5000) {
                tip = _("<b>Inverse Chamfer</b>: <b>Ctrl+Click</b> toggle type, "
                        "<b>Shift+Click</b> open dialog, "
                        "<b>Ctrl+Alt+Click</b> reset");
            } else if (type == 2) {
                tip = _("<b>Inverse Fillet</b>: <b>Ctrl+Click</b> toggle type, "
                        "<b>Shift+Click</b> open dialog, "
                        "<b>Ctrl+Alt+Click</b> reset");
            } else {
                tip = _("<b>Fillet</b>: <b>Ctrl+Click</b> toggle type, "
                        "<b>Shift+Click</b> open dialog, "
                        "<b>Ctrl+Alt+Click</b> reset");
            }
            this->knot->tip = g_strdup(tip);
            this->knot->show();
        }
    } else if (state & GDK_SHIFT_MASK) {
        double xModified = _pparam->_vector.at(_index).x();
        if(xModified < 0 && !_pparam->use_distance){
             xModified = _pparam->len_to_rad(_index, _pparam->_vector.at(_index).x());
        }
        Geom::PathVector subpaths = path_from_piecewise(_pparam->last_pwd2, 0.1);
        std::pair<std::size_t, std::size_t> positions = _pparam->get_positions(_index, subpaths);
        D2<SBasis> A = _pparam->last_pwd2[_pparam->last_index(_index, subpaths)];
        if(positions.second != 0){
            A = _pparam->last_pwd2[_index-1];
        }
        D2<SBasis> B = _pparam->last_pwd2[_index];
        bool aprox = (A[0].degreesOfFreedom() != 2 || B[0].degreesOfFreedom() != 2) && !_pparam->use_distance?true:false;
        Geom::Point offset = Geom::Point(xModified, _pparam->_vector.at(_index).y());
        Inkscape::UI::Dialogs::FilletChamferPropertiesDialog::showDialog(
            this->desktop, offset, this, _pparam->use_distance, aprox);
    }

}

void FilletChamferPointArrayParamKnotHolderEntity::knot_set_offset(
    Geom::Point offset)
{
    double xModified = offset.x();
    if(xModified < 0 && !_pparam->use_distance){
         xModified = _pparam->rad_to_len(_index, offset.x());
    }
    _pparam->_vector.at(_index) = Geom::Point(xModified, offset.y());
    this->parent_holder->knot_ungrabbed_handler(this->knot, 0);
}

void FilletChamferPointArrayParam::addKnotHolderEntities(KnotHolder *knotholder,
        SPDesktop *desktop,
        SPItem *item)
{
    recalculate_knots(get_pwd2());
    for (unsigned int i = 0; i < _vector.size(); ++i) {
        if (_vector[i][Y] <= 0) {
            continue;
        }
        const gchar *tip;
        if (_vector[i][Y] >=3000 && _vector[i][Y] < 4000){
             tip = _("<b>Chamfer</b>: <b>Ctrl+Click</b> toggle type, "
                    "<b>Shift+Click</b> open dialog, "
                    "<b>Ctrl+Alt+Click</b> reset");
        } else if (_vector[i][Y] >=4000 && _vector[i][Y] < 5000) {
            tip = _("<b>Inverse Chamfer</b>: <b>Ctrl+Click</b> toggle type, "
                    "<b>Shift+Click</b> open dialog, "
                    "<b>Ctrl+Alt+Click</b> reset");
        } else if (_vector[i][Y] == 2) {
            tip = _("<b>Inverse Fillet</b>: <b>Ctrl+Click</b> toggle type, "
                    "<b>Shift+Click</b> open dialog, "
                    "<b>Ctrl+Alt+Click</b> reset");
        } else {
            tip = _("<b>Fillet</b>: <b>Ctrl+Click</b> toggle type, "
                    "<b>Shift+Click</b> open dialog, "
                    "<b>Ctrl+Alt+Click</b> reset");
        }
        FilletChamferPointArrayParamKnotHolderEntity *e =
            new FilletChamferPointArrayParamKnotHolderEntity(this, i);
        e->create(desktop, item, knotholder, Inkscape::CTRL_TYPE_UNKNOWN, _(tip),
                  knot_shape, knot_mode, knot_color);
        knotholder->add(e);
    }
    updateCanvasIndicators();
}

} /* namespace LivePathEffect */

} /* namespace Inkscape */

/*
  Local Variables:
  mode:c++
  c-file-style:"stroustrup"
  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  indent-tabs-mode:nil
  fill-column:99
  End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :