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-rw-r--r--src/extension/prefdialog/parameter-float.cpp191
1 files changed, 191 insertions, 0 deletions
diff --git a/src/extension/prefdialog/parameter-float.cpp b/src/extension/prefdialog/parameter-float.cpp
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+++ b/src/extension/prefdialog/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 "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 */