parameter-float.cpp

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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 <gtkmm/label.h>
 
#include "extension/extension.h"
#include "preferences.h"
#include "ui/pack.h"
#include "ui/widget/spinbutton.h"
#include "ui/widget/spin-scale.h"
#include "util-string/ustring-format.h"
#include "xml/node.h"
 
namespace Inkscape::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)
            string_to_value(value);
    }
 
    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());
        }
    }
}
 
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
{
    return Inkscape::ustring::format_classic(std::setprecision(_precision), std::fixed, _value);
}
 
void ParamFloat::string_to_value(const std::string &in)
{
    _value = g_ascii_strtod(in.c_str(), nullptr);
}
 
class ParamFloatAdjustment : public Gtk::Adjustment {
    ParamFloat *_pref;
    sigc::signal<void ()> *_changeSignal;
protected:
    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 ();
 
public:
    static Glib::RefPtr<ParamFloatAdjustment> create(ParamFloat* param, sigc::signal<void ()>* changeSignal) {
        return Glib::make_refptr_for_instance(new ParamFloatAdjustment(param, changeSignal));
    }
 
}; /* class ParamFloatAdjustment */
 
void ParamFloatAdjustment::val_changed()
{
    _pref->set(this->get_value());
    if (_changeSignal != nullptr) {
        _changeSignal->emit();
    }
    return;
}
 
Gtk::Widget *ParamFloat::get_widget(sigc::signal<void ()> *changeSignal)
{
    if (_hidden) {
        return nullptr;
    }
 
    auto const hbox = Gtk::make_managed<Gtk::Box>(Gtk::Orientation::HORIZONTAL, GUI_PARAM_WIDGETS_SPACING);
 
    auto fadjust = ParamFloatAdjustment::create(this, changeSignal);
 
    if (_mode == FULL) {
 
        Glib::ustring text;
        if (_text != nullptr)
            text = _text;
        auto const scale = Gtk::make_managed<UI::Widget::SpinScale>(text, fadjust, _precision);
        scale->set_size_request(400, -1);
        scale->set_visible(true);
        UI::pack_start(*hbox, *scale, true, true);
 
    }
    else if (_mode == DEFAULT) {
 
        auto const label = Gtk::make_managed<Gtk::Label>(_text, Gtk::Align::START);
        label->set_visible(true);
        UI::pack_start(*hbox, *label, true, true);
 
        auto const spin = Gtk::make_managed<Inkscape::UI::Widget::SpinButton>(fadjust, 0.1, _precision);
        spin->set_visible(true);
        UI::pack_start(*hbox, *spin, false, false);
    }
 
    hbox->set_visible(true);
    return hbox;
}
 
} // namespace Inkscape::Extension
 
/*
  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 :