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/*
* Authors:
* Jabier Arraiza Cenoz
*
* Copyright (C) Jabier Arraiza Cenoz 2014 <jabier.arraiza@marker.es>
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include <gtkmm.h>
#include <glibmm/i18n.h>
#include "live_effects/lpe-show_handles.h"
#include "live_effects/parameter/parameter.h"
#include <2geom/sbasis-to-bezier.h>
#include <2geom/svg-path-parser.h>
#include "helper/geom.h"
#include "desktop-style.h"
#include "style.h"
#include "svg/svg.h"
namespace Inkscape {
namespace LivePathEffect {
LPEShowHandles::LPEShowHandles(LivePathEffectObject *lpeobject)
: Effect(lpeobject),
nodes(_("Show nodes"), _("Show nodes"), "nodes", &wr, this, true),
handles(_("Show handles"), _("Show handles"), "handles", &wr, this, true),
originalPath(_("Show path"), _("Show path"), "originalPath", &wr, this, true),
scaleNodesAndHandles(_("Scale nodes and handles"), _("Scale nodes and handles"), "scaleNodesAndHandles", &wr, this, 10)
{
registerParameter(dynamic_cast<Parameter *>(&nodes));
registerParameter(dynamic_cast<Parameter *>(&handles));
registerParameter(dynamic_cast<Parameter *>(&originalPath));
registerParameter(dynamic_cast<Parameter *>(&scaleNodesAndHandles));
scaleNodesAndHandles.param_set_range(0, 500.);
scaleNodesAndHandles.param_set_increments(1, 1);
scaleNodesAndHandles.param_set_digits(2);
strokeWidth = 1.0;
}
bool LPEShowHandles::alertsOff = false;
/**
* Sets default styles to element
* this permanently remove.some styles of the element
*/
void LPEShowHandles::doOnApply(SPLPEItem const* lpeitem)
{
if(!alertsOff) {
char *msg = _("The \"show handles\" path effect will remove any custom style on the object you are applying it to. If this is not what you want, click Cancel.");
Gtk::MessageDialog dialog(msg, false, Gtk::MESSAGE_QUESTION, Gtk::BUTTONS_OK_CANCEL, true);
gint response = dialog.run();
alertsOff = true;
if(response == GTK_RESPONSE_CANCEL) {
SPLPEItem* item = const_cast<SPLPEItem*>(lpeitem);
item->removeCurrentPathEffect(false);
return;
}
}
SPLPEItem* item = const_cast<SPLPEItem*>(lpeitem);
SPCSSAttr *css = sp_repr_css_attr_new ();
sp_repr_css_set_property (css, "stroke", "black");
sp_repr_css_set_property (css, "stroke-width", "1");
sp_repr_css_set_property (css, "stroke-linecap", "butt");
sp_repr_css_set_property(css, "fill", "none");
sp_desktop_apply_css_recursive(item, css, true);
sp_repr_css_attr_unref (css);
}
void LPEShowHandles::doBeforeEffect (SPLPEItem const* lpeitem)
{
SPItem const* item = SP_ITEM(lpeitem);
strokeWidth = item->style->stroke_width.computed;
}
std::vector<Geom::Path> LPEShowHandles::doEffect_path (std::vector<Geom::Path> const & path_in)
{
std::vector<Geom::Path> path_out;
Geom::PathVector const original_pathv = pathv_to_linear_and_cubic_beziers(path_in);
if(originalPath) {
for (unsigned int i=0; i < path_in.size(); i++) {
path_out.push_back(path_in[i]);
}
}
if(!outlinepath.empty()) {
outlinepath.clear();
}
generateHelperPath(original_pathv);
for (unsigned int i=0; i < outlinepath.size(); i++) {
path_out.push_back(outlinepath[i]);
}
return path_out;
}
void
LPEShowHandles::generateHelperPath(Geom::PathVector result)
{
if(!handles && !nodes) {
return;
}
Geom::CubicBezier const *cubic = NULL;
for (Geom::PathVector::iterator path_it = result.begin(); path_it != result.end(); ++path_it) {
//Si está vacío...
if (path_it->empty()) {
continue;
}
//Itreadores
Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
Geom::Path::const_iterator curve_endit = path_it->end_default(); // this determines when the loop has to stop
if (path_it->closed()) {
// if the path is closed, maybe we have to stop a bit earlier because the
// closing line segment has zerolength.
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();
}
}
if(nodes) {
drawNode(curve_it1->initialPoint());
}
while (curve_it1 != curve_endit) {
cubic = dynamic_cast<Geom::CubicBezier const *>(&*curve_it1);
if (cubic) {
if(handles) {
if(!are_near((*cubic)[0],(*cubic)[1])){
drawHandle((*cubic)[1]);
drawHandleLine((*cubic)[0],(*cubic)[1]);
}
if(!are_near((*cubic)[3],(*cubic)[2])){
drawHandle((*cubic)[2]);
drawHandleLine((*cubic)[3],(*cubic)[2]);
}
}
}
if(nodes) {
drawNode(curve_it1->finalPoint());
}
++curve_it1;
if(curve_it2 != curve_endit){
++curve_it2;
}
}
}
}
void
LPEShowHandles::drawNode(Geom::Point p)
{
if(strokeWidth * scaleNodesAndHandles > 0.0) {
double diameter = strokeWidth * scaleNodesAndHandles;
char const * svgd;
svgd = "M 0.55,0.5 A 0.05,0.05 0 0 1 0.5,0.55 0.05,0.05 0 0 1 0.45,0.5 0.05,0.05 0 0 1 0.5,0.45 0.05,0.05 0 0 1 0.55,0.5 Z M 0,0 1,0 1,1 0,1 Z";
Geom::PathVector pathv = sp_svg_read_pathv(svgd);
pathv *= Geom::Affine(diameter,0,0,diameter,0,0);
pathv += p - Geom::Point(diameter/2,diameter/2);
outlinepath.push_back(pathv[0]);
outlinepath.push_back(pathv[1]);
}
}
void
LPEShowHandles::drawHandle(Geom::Point p)
{
if(strokeWidth * scaleNodesAndHandles > 0.0) {
double diameter = strokeWidth * scaleNodesAndHandles;
char const * svgd;
svgd = "M 0.7,0.35 A 0.35,0.35 0 0 1 0.35,0.7 0.35,0.35 0 0 1 0,0.35 0.35,0.35 0 0 1 0.35,0 0.35,0.35 0 0 1 0.7,0.35 Z";
Geom::PathVector pathv = sp_svg_read_pathv(svgd);
pathv *= Geom::Affine(diameter,0,0,diameter,0,0);
pathv += p - Geom::Point(diameter * 0.35,diameter * 0.35);
outlinepath.push_back(pathv[0]);
}
}
void
LPEShowHandles::drawHandleLine(Geom::Point p,Geom::Point p2)
{
Geom::Path path;
double diameter = strokeWidth * scaleNodesAndHandles;
if(diameter > 0.0 && Geom::distance(p,p2) > (diameter * 0.35)){
Geom::Ray ray2(p, p2);
p2 = p2 - Geom::Point::polar(ray2.angle(),(diameter * 0.35));
}
path.start( p );
path.appendNew<Geom::LineSegment>( p2 );
outlinepath.push_back(path);
}
}; //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 :
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