transformedpoint.cpp

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) Theodore Janeczko 2012 <flutterguy317@gmail.com>
 *
 * Released under GNU GPL v2+, read the file 'COPYING' for more information.
 */
 
#include "transformedpoint.h"
 
#include <glibmm/i18n.h>
 
#include "desktop.h"
 
#include "live_effects/effect.h"
#include "object/sp-lpe-item.h"
#include "svg/stringstream.h"
#include "svg/svg.h"
#include "ui/icon-names.h"
#include "ui/knot/knot-holder-entity.h"
#include "ui/knot/knot-holder.h"
#include "ui/pack.h"
#include "ui/widget/registered-widget.h"
 
namespace Inkscape {
namespace LivePathEffect {
 
TransformedPointParam::TransformedPointParam( const Glib::ustring& label, const Glib::ustring& tip,
                        const Glib::ustring& key, Inkscape::UI::Widget::Registry* wr,
                        Effect* effect, Geom::Point default_vector,
                        bool dontTransform)
    : Parameter(label, tip, key, wr, effect),
      defvalue(default_vector),
      vector(default_vector),
      noTransform(dontTransform)
{
}
 
TransformedPointParam::~TransformedPointParam() = default;
 
void
TransformedPointParam::param_set_default()
{
    setOrigin(Geom::Point(0.,0.));
    setVector(defvalue);
}
 
bool
TransformedPointParam::param_readSVGValue(const gchar * strvalue)
{
    gchar ** strarray = g_strsplit(strvalue, ",", 4);
    if (!strarray) {
        return false;
    }
    double val[4];
    unsigned int i = 0;
    while (i < 4 && strarray[i]) {
        if (sp_svg_number_read_d(strarray[i], &val[i]) != 0) {
            i++;
        } else {
            break;
        }
    }
    g_strfreev (strarray);
    if (i == 4) {
        setOrigin( Geom::Point(val[0], val[1]) );
        setVector( Geom::Point(val[2], val[3]) );
        return true;
    }
    return false;
}
 
Glib::ustring
TransformedPointParam::param_getSVGValue() const
{
    Inkscape::SVGOStringStream os;
    os << origin << " , " << vector;
    return os.str();
}
 
Glib::ustring
TransformedPointParam::param_getDefaultSVGValue() const
{
    Inkscape::SVGOStringStream os;
    os << defvalue;
    return os.str();
}
 
void
TransformedPointParam::param_update_default(Geom::Point default_point)
{
    defvalue = default_point;
}
 
void
TransformedPointParam::param_update_default(const gchar * default_point)
{
    gchar ** strarray = g_strsplit(default_point, ",", 2);
    double newx, newy;
    unsigned int success = sp_svg_number_read_d(strarray[0], &newx);
    success += sp_svg_number_read_d(strarray[1], &newy);
    g_strfreev (strarray);
    if (success == 2) {
        param_update_default( Geom::Point(newx, newy) );
    }
}
 
Gtk::Widget *
TransformedPointParam::param_newWidget()
{
    auto const pointwdg = Gtk::make_managed<UI::Widget::RegisteredVector>( param_label,
                                                                           param_tooltip,
                                                                           param_key,
                                                                          *param_wr,
                                                                           param_effect->getRepr(),
                                                                           param_effect->getSPDoc() );
    pointwdg->setPolarCoords();
    pointwdg->setValue( vector, origin );
    pointwdg->clearProgrammatically();
    pointwdg->set_undo_parameters(_("Change vector parameter"), INKSCAPE_ICON("dialog-path-effects"));
    
    auto const hbox = Gtk::make_managed<Gtk::Box>(Gtk::Orientation::HORIZONTAL);
    UI::pack_start(*hbox, *pointwdg, true, true);
    return hbox;
}
 
void
TransformedPointParam::set_and_write_new_values(Geom::Point const &new_origin, Geom::Point const &new_vector)
{
    setValues(new_origin, new_vector);
    param_write_to_repr(param_getSVGValue().c_str());
}
 
void
TransformedPointParam::param_transform_multiply(Geom::Affine const& postmul, bool /*set*/)
{
    if (!noTransform) {
        set_and_write_new_values( origin * postmul, vector * postmul.withoutTranslation() );
    }
}
 
void TransformedPointParam::set_vector_oncanvas_looks(CanvasItemCtrlShape shape, uint32_t color)
{
    vec_knot_shape = shape;
    vec_knot_color = color;
}
 
void
TransformedPointParam::set_oncanvas_color(guint32 color)
{
    vec_knot_color = color;
}
 
class TransformedPointParamKnotHolderEntity_Vector : public KnotHolderEntity {
public:
    TransformedPointParamKnotHolderEntity_Vector(TransformedPointParam *p) : param(p) { }
    ~TransformedPointParamKnotHolderEntity_Vector() override = default;
 
    void knot_set(Geom::Point const &p, Geom::Point const &/*origin*/, guint /*state*/) override {
        Geom::Point const s = p - param->origin;
        param->setVector(s);
        param->set_and_write_new_values(param->origin, param->vector);
        sp_lpe_item_update_patheffect(cast<SPLPEItem>(item), false, false);
    };
    void knot_ungrabbed(Geom::Point const &p, Geom::Point const &origin, guint state) override
    {
        param->param_effect->makeUndoDone(_("Move handle"));
    };
    Geom::Point knot_get() const override{
        return param->origin + param->vector;
    };
    void knot_click(guint /*state*/) override{
        g_message ("This is the vector handle associated to parameter '%s'", param->param_key.c_str());
    };
 
private:
    TransformedPointParam *param;
};
 
void
TransformedPointParam::addKnotHolderEntities(KnotHolder *knotholder, SPDesktop *desktop, SPItem *item)
{
    TransformedPointParamKnotHolderEntity_Vector *vector_e = new TransformedPointParamKnotHolderEntity_Vector(this);
    vector_e->create(desktop, item, knotholder, Inkscape::CANVAS_ITEM_CTRL_TYPE_LPE, "LPE:Point", handleTip(),
                     vec_knot_color);
    knotholder->add(vector_e);
}
 
} /* 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 :