Adding upstream version 1.2.2.upstream/1.2.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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 */