1 files changed, 208 insertions, 0 deletions
diff --git a/src/live_effects/parameter/parameter.cpp b/src/live_effects/parameter/parameter.cpp
new file mode 100644
index 0000000..355e7dd
--- /dev/null
+++ b/src/live_effects/parameter/parameter.cpp
@@ -0,0 +1,208 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+
+#include "live_effects/parameter/parameter.h"
+#include "live_effects/effect.h"
+#include "svg/svg.h"
+#include "xml/repr.h"
+
+#include "svg/stringstream.h"
+
+#include "verbs.h"
+
+#include <glibmm/i18n.h>
+
+#include <utility>
+
+#define noLPEREALPARAM_DEBUG
+
+namespace Inkscape {
+
+namespace LivePathEffect {
+
+
+Parameter::Parameter(Glib::ustring label, Glib::ustring tip, Glib::ustring key, Inkscape::UI::Widget::Registry *wr,
+                     Effect *effect)
+    : param_key(std::move(key))
+    , param_wr(wr)
+    , param_label(std::move(label))
+    , oncanvas_editable(false)
+    , widget_is_visible(true)
+    , widget_is_enabled(true)
+    , param_tooltip(std::move(tip))
+    , param_effect(effect)
+{
+}
+
+void Parameter::param_write_to_repr(const char *svgd)
+{
+    param_effect->getRepr()->setAttribute(param_key, svgd);
+}
+
+void Parameter::write_to_SVG()
+{
+    param_write_to_repr(param_getSVGValue().c_str());
+}
+
+/*###########################################
+ *   REAL PARAM
+ */
+ScalarParam::ScalarParam(const Glib::ustring &label, const Glib::ustring &tip, const Glib::ustring &key,
+                         Inkscape::UI::Widget::Registry *wr, Effect *effect, gdouble default_value)
+    : Parameter(label, tip, key, wr, effect)
+    , value(default_value)
+    , min(-SCALARPARAM_G_MAXDOUBLE)
+    , max(SCALARPARAM_G_MAXDOUBLE)
+    , integer(false)
+    , defvalue(default_value)
+    , digits(2)
+    , inc_step(0.1)
+    , inc_page(1)
+    , add_slider(false)
+    , _set_undo(true)
+{
+}
+
+ScalarParam::~ScalarParam() = default;
+
+bool ScalarParam::param_readSVGValue(const gchar *strvalue)
+{
+    double newval;
+    unsigned int success = sp_svg_number_read_d(strvalue, &newval);
+    if (success == 1) {
+        param_set_value(newval);
+        return true;
+    }
+    return false;
+}
+
+Glib::ustring ScalarParam::param_getSVGValue() const
+{
+    Inkscape::SVGOStringStream os;
+    os << value;
+    return os.str();
+}
+
+Glib::ustring ScalarParam::param_getDefaultSVGValue() const
+{
+    Inkscape::SVGOStringStream os;
+    os << defvalue;
+    return os.str();
+}
+
+void ScalarParam::param_set_default() { param_set_value(defvalue); }
+
+void ScalarParam::param_update_default(gdouble default_value) { defvalue = default_value; }
+
+void ScalarParam::param_update_default(const gchar *default_value)
+{
+    double newval;
+    unsigned int success = sp_svg_number_read_d(default_value, &newval);
+    if (success == 1) {
+        param_update_default(newval);
+    }
+}
+
+void ScalarParam::param_transform_multiply(Geom::Affine const &postmul, bool set)
+{
+    // Check if proportional stroke-width scaling is on
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    bool transform_stroke = prefs ? prefs->getBool("/options/transform/stroke", true) : true;
+    if (transform_stroke || set) {
+        param_set_value(value * postmul.descrim());
+        write_to_SVG();
+    }
+}
+
+void ScalarParam::param_set_value(gdouble val)
+{
+    value = val;
+    if (integer)
+        value = round(value);
+    if (value > max)
+        value = max;
+    if (value < min)
+        value = min;
+}
+
+void ScalarParam::param_set_range(gdouble min, gdouble max)
+{
+    // if you look at client code, you'll see that many effects
+    // has a tendency to set an upper range of Geom::infinity().
+    // Once again, in gtk2, this is not a problem. But in gtk3,
+    // widgets get allocated the amount of size they ask for,
+    // leading to excessively long widgets.
+    if (min >= -SCALARPARAM_G_MAXDOUBLE) {
+        this->min = min;
+    } else {
+        this->min = -SCALARPARAM_G_MAXDOUBLE;
+    }
+    if (max <= SCALARPARAM_G_MAXDOUBLE) {
+        this->max = max;
+    } else {
+        this->max = SCALARPARAM_G_MAXDOUBLE;
+    }
+    param_set_value(value); // reset value to see whether it is in ranges
+}
+
+void ScalarParam::param_make_integer(bool yes)
+{
+    integer = yes;
+    digits = 0;
+    inc_step = 1;
+    inc_page = 10;
+}
+
+void ScalarParam::param_set_undo(bool set_undo) { _set_undo = set_undo; }
+
+Gtk::Widget *ScalarParam::param_newWidget()
+{
+    if (widget_is_visible) {
+        Inkscape::UI::Widget::RegisteredScalar *rsu = Gtk::manage(new Inkscape::UI::Widget::RegisteredScalar(
+            param_label, param_tooltip, param_key, *param_wr, param_effect->getRepr(), param_effect->getSPDoc()));
+
+        rsu->setValue(value);
+        rsu->setDigits(digits);
+        rsu->setIncrements(inc_step, inc_page);
+        rsu->setRange(min, max);
+        rsu->setProgrammatically = false;
+        if (add_slider) {
+            rsu->addSlider();
+        }
+        if (_set_undo) {
+            rsu->set_undo_parameters(SP_VERB_DIALOG_LIVE_PATH_EFFECT, _("Change scalar parameter"));
+        }
+        return dynamic_cast<Gtk::Widget *>(rsu);
+    } else {
+        return nullptr;
+    }
+}
+
+void ScalarParam::param_set_digits(unsigned digits) { this->digits = digits; }
+
+void ScalarParam::param_set_increments(double step, double page)
+{
+    inc_step = step;
+    inc_page = page;
+}
+
+
+
+} /* namespace LivePathEffect */
+} /* namespace Inkscape */
+
+/*
+  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 :