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Diffstat (limited to 'src/extension/prefdialog/parameter-float.cpp')
| -rw-r--r-- | src/extension/prefdialog/parameter-float.cpp | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/src/extension/prefdialog/parameter-float.cpp b/src/extension/prefdialog/parameter-float.cpp new file mode 100644 index 0000000..7d8c843 --- /dev/null +++ b/src/extension/prefdialog/parameter-float.cpp @@ -0,0 +1,191 @@ +// 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 */ |