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// SPDX-License-Identifier: GPL-2.0-or-later
/**
\file grid.cpp
A plug-in to add a grid creation effect into Inkscape.
*/
/*
* Copyright (C) 2004-2005 Ted Gould <ted@gould.cx>
* Copyright (C) 2007 MenTaLguY <mental@rydia.net>
* Abhishek Sharma
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <gtkmm/box.h>
#include <gtkmm/adjustment.h>
#include <gtkmm/spinbutton.h>
#include "desktop.h"
#include "document.h"
#include "selection.h"
#include "2geom/geom.h"
#include "object/sp-object.h"
#include "svg/path-string.h"
#include "extension/effect.h"
#include "extension/system.h"
#include "util/units.h"
#include "grid.h"
namespace Inkscape {
namespace Extension {
namespace Internal {
/**
\brief A function to allocated anything -- just an example here
\param module Unused
\return Whether the load was successful
*/
bool
Grid::load (Inkscape::Extension::Extension */*module*/)
{
// std::cout << "Hey, I'm Grid, I'm loading!" << std::endl;
return TRUE;
}
namespace {
Glib::ustring build_lines(Geom::Rect bounding_area,
Geom::Point const &offset, Geom::Point const &spacing)
{
std::cout << "Building lines" << std::endl;
Geom::Point point_offset(0.0, 0.0);
SVG::PathString path_data;
for ( int axis = Geom::X ; axis <= Geom::Y ; ++axis ) {
point_offset[axis] = offset[axis];
for (Geom::Point start_point = bounding_area.min();
start_point[axis] + offset[axis] <= (bounding_area.max())[axis];
start_point[axis] += spacing[axis]) {
Geom::Point end_point = start_point;
end_point[1-axis] = (bounding_area.max())[1-axis];
path_data.moveTo(start_point + point_offset)
.lineTo(end_point + point_offset);
}
}
std::cout << "Path data:" << path_data.c_str() << std::endl;
return path_data;
}
} // namespace
/**
\brief This actually draws the grid.
\param module The effect that was called (unused)
\param document What should be edited.
*/
void
Grid::effect (Inkscape::Extension::Effect *module, Inkscape::UI::View::View *document, Inkscape::Extension::Implementation::ImplementationDocumentCache * /*docCache*/)
{
std::cout << "Executing effect" << std::endl;
Inkscape::Selection * selection = ((SPDesktop *)document)->selection;
Geom::Rect bounding_area = Geom::Rect(Geom::Point(0,0), Geom::Point(100,100));
if (selection->isEmpty()) {
/* get page size */
SPDocument * doc = document->doc();
bounding_area = Geom::Rect( Geom::Point(0,0),
Geom::Point(doc->getWidth().value("px"), doc->getHeight().value("px")) );
} else {
Geom::OptRect bounds = selection->visualBounds();
if (bounds) {
bounding_area = *bounds;
}
gdouble doc_height = (document->doc())->getHeight().value("px");
Geom::Rect temprec = Geom::Rect(Geom::Point(bounding_area.min()[Geom::X], doc_height - bounding_area.min()[Geom::Y]),
Geom::Point(bounding_area.max()[Geom::X], doc_height - bounding_area.max()[Geom::Y]));
bounding_area = temprec;
}
double scale = document->doc()->getDocumentScale().inverse()[Geom::X];
bounding_area *= Geom::Scale(scale);
Geom::Point spacings( scale * module->get_param_float("xspacing"),
scale * module->get_param_float("yspacing") );
gdouble line_width = scale * module->get_param_float("lineWidth");
Geom::Point offsets( scale * module->get_param_float("xoffset"),
scale * module->get_param_float("yoffset") );
Glib::ustring path_data("");
path_data = build_lines(bounding_area, offsets, spacings);
Inkscape::XML::Document * xml_doc = document->doc()->getReprDoc();
//XML Tree being used directly here while it shouldn't be.
Inkscape::XML::Node * current_layer = static_cast<SPDesktop *>(document)->currentLayer()->getRepr();
Inkscape::XML::Node * path = xml_doc->createElement("svg:path");
path->setAttribute("d", path_data);
std::ostringstream stringstream;
stringstream << "fill:none;stroke:#000000;stroke-width:" << line_width << "px";
path->setAttribute("style", stringstream.str());
current_layer->appendChild(path);
Inkscape::GC::release(path);
}
/** \brief A class to make an adjustment that uses Extension params */
class PrefAdjustment : public Gtk::Adjustment {
/** Extension that this relates to */
Inkscape::Extension::Extension * _ext;
/** The string which represents the parameter */
char * _pref;
public:
/** \brief Make the adjustment using an extension and the string
describing the parameter. */
PrefAdjustment(Inkscape::Extension::Extension * ext, char * pref) :
Gtk::Adjustment(0.0, 0.0, 10.0, 0.1), _ext(ext), _pref(pref) {
this->set_value(_ext->get_param_float(_pref));
this->signal_value_changed().connect(sigc::mem_fun(this, &PrefAdjustment::val_changed));
return;
};
void val_changed ();
}; /* class PrefAdjustment */
/** \brief A function to respond to the value_changed signal from the
adjustment.
This function just grabs the value from the adjustment and writes
it to the parameter. Very simple, but yet beautiful.
*/
void
PrefAdjustment::val_changed ()
{
// std::cout << "Value Changed to: " << this->get_value() << std::endl;
_ext->set_param_float(_pref, this->get_value());
return;
}
/** \brief A function to get the preferences for the grid
\param module Module which holds the params
\param view Unused today - may get style information in the future.
Uses AutoGUI for creating the GUI.
*/
Gtk::Widget *
Grid::prefs_effect(Inkscape::Extension::Effect *module, Inkscape::UI::View::View * view, sigc::signal<void> * changeSignal, Inkscape::Extension::Implementation::ImplementationDocumentCache * /*docCache*/)
{
SPDocument * current_document = view->doc();
auto selected = ((SPDesktop *) view)->getSelection()->items();
Inkscape::XML::Node * first_select = nullptr;
if (!selected.empty()) {
first_select = selected.front()->getRepr();
}
return module->autogui(current_document, first_select, changeSignal);
}
}; /* namespace Internal */
}; /* namespace Extension */
}; /* 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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