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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2005-2007 Authors:
* Ted Gould <ted@gould.cx>
* Johan Engelen <johan@shouraizou.nl> *
* Jon A. Cruz <jon@joncruz.org>
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "parameter-float.h"
#include <iomanip>
#include <gtkmm/adjustment.h>
#include <gtkmm/box.h>
#include "preferences.h"
#include "extension/extension.h"
#include "ui/widget/spin-scale.h"
#include "ui/widget/spinbutton.h"
#include "xml/node.h"
namespace Inkscape {
namespace Extension {
ParamFloat::ParamFloat(Inkscape::XML::Node *xml, Inkscape::Extension::Extension *ext)
: InxParameter(xml, ext)
{
// get value
if (xml->firstChild()) {
const char *value = xml->firstChild()->content();
if (value) {
_value = g_ascii_strtod(value, nullptr);
}
}
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
_value = prefs->getDouble(pref_name(), _value);
// parse and apply limits
const char *min = xml->attribute("min");
if (min) {
_min = g_ascii_strtod(min, nullptr);
}
const char *max = xml->attribute("max");
if (max) {
_max = g_ascii_strtod(max, nullptr);
}
if (_value < _min) {
_value = _min;
}
if (_value > _max) {
_value = _max;
}
// parse precision
const char *precision = xml->attribute("precision");
if (precision != nullptr) {
_precision = strtol(precision, nullptr, 0);
}
// parse appearance
if (_appearance) {
if (!strcmp(_appearance, "full")) {
_mode = FULL;
} else {
g_warning("Invalid value ('%s') for appearance of parameter '%s' in extension '%s'",
_appearance, _name, _extension->get_id());
}
}
}
/**
* A function to set the \c _value.
*
* This function sets the internal value, but it also sets the value
* in the preferences structure. To put it in the right place \c pref_name() is used.
*
* @param in The value to set to.
*/
double ParamFloat::set(double in)
{
_value = in;
if (_value > _max) {
_value = _max;
}
if (_value < _min) {
_value = _min;
}
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
prefs->setDouble(pref_name(), _value);
return _value;
}
std::string ParamFloat::value_to_string() const
{
static constexpr auto digits10 = std::numeric_limits<double>::digits10; // number of decimal digits that are ensured to be precise
return Glib::ustring::format(std::setprecision(digits10), _value);
}
/** A class to make an adjustment that uses Extension params. */
class ParamFloatAdjustment : public Gtk::Adjustment {
/** The parameter to adjust. */
ParamFloat *_pref;
sigc::signal<void> *_changeSignal;
public:
/** Make the adjustment using an extension and the string
describing the parameter. */
ParamFloatAdjustment(ParamFloat *param, sigc::signal<void> *changeSignal)
: Gtk::Adjustment(0.0, param->min(), param->max(), 0.1, 1.0, 0)
, _pref(param)
, _changeSignal(changeSignal) {
this->set_value(_pref->get());
this->signal_value_changed().connect(sigc::mem_fun(this, &ParamFloatAdjustment::val_changed));
return;
};
void val_changed ();
}; /* class ParamFloatAdjustment */
/**
* 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 ParamFloatAdjustment::val_changed()
{
_pref->set(this->get_value());
if (_changeSignal != nullptr) {
_changeSignal->emit();
}
return;
}
/**
* Creates a Float Adjustment for a float parameter.
*
* Builds a hbox with a label and a float adjustment in it.
*/
Gtk::Widget *ParamFloat::get_widget(sigc::signal<void> *changeSignal)
{
if (_hidden) {
return nullptr;
}
Gtk::Box *hbox = Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL, GUI_PARAM_WIDGETS_SPACING));
auto pfa = new ParamFloatAdjustment(this, changeSignal);
Glib::RefPtr<Gtk::Adjustment> fadjust(pfa);
if (_mode == FULL) {
Glib::ustring text;
if (_text != nullptr)
text = _text;
UI::Widget::SpinScale *scale = Gtk::manage(new UI::Widget::SpinScale(text, fadjust, _precision));
scale->set_size_request(400, -1);
scale->show();
hbox->pack_start(*scale, true, true);
}
else if (_mode == DEFAULT) {
Gtk::Label *label = Gtk::manage(new Gtk::Label(_text, Gtk::ALIGN_START));
label->show();
hbox->pack_start(*label, true, true);
auto spin = Gtk::manage(new Inkscape::UI::Widget::SpinButton(fadjust, 0.1, _precision));
spin->show();
hbox->pack_start(*spin, false, false);
}
hbox->show();
return dynamic_cast<Gtk::Widget *>(hbox);
}
} /* namespace Extension */
} /* namespace Inkscape */
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