1 files changed, 184 insertions, 0 deletions
diff --git a/src/live_effects/parameter/text.cpp b/src/live_effects/parameter/text.cpp
new file mode 100644
index 0000000..ea0171d
--- /dev/null
+++ b/src/live_effects/parameter/text.cpp
@@ -0,0 +1,184 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) Maximilian Albert 2008 <maximilian.albert@gmail.com>
+ *
+ * Authors:
+ *   Maximilian Albert
+ *   Johan Engelen
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "text.h"
+
+#include <glibmm/i18n.h>
+#include <gtkmm/alignment.h>
+
+#include <2geom/sbasis-geometric.h>
+
+#include "inkscape.h"
+
+#include "display/control/canvas-item-text.h"
+
+#include "live_effects/effect.h"
+
+#include "svg/stringstream.h"
+#include "svg/svg.h"
+
+#include "ui/icon-names.h"
+#include "ui/widget/registered-widget.h"
+
+
+namespace Inkscape {
+
+namespace LivePathEffect {
+
+TextParam::TextParam( const Glib::ustring& label, const Glib::ustring& tip,
+                      const Glib::ustring& key, Inkscape::UI::Widget::Registry* wr,
+                      Effect* effect, const Glib::ustring default_value )
+    : Parameter(label, tip, key, wr, effect)
+    , value(default_value)
+    , defvalue(default_value)
+{
+    if (SPDesktop *desktop = SP_ACTIVE_DESKTOP) { // FIXME: we shouldn't use this!
+        canvas_text = new Inkscape::CanvasItemText(desktop->getCanvasTemp(), Geom::Point(0, 0), default_value);
+    }
+}
+
+TextParam::~TextParam()
+{
+    if (canvas_text) {
+        delete canvas_text;
+    }
+}
+
+void
+TextParam::param_set_default()
+{
+    param_setValue(defvalue);
+}
+
+void
+TextParam::param_update_default(const gchar * default_value)
+{
+    defvalue = (Glib::ustring)default_value;
+}
+
+// This is a bit silly, we should have an option in the constructor to not create the canvas_text object.
+void
+TextParam::param_hide_canvas_text()
+{
+    if (canvas_text) {
+        delete canvas_text;
+        canvas_text = nullptr;
+    }
+}
+
+void
+TextParam::setPos(Geom::Point pos)
+{
+    if (canvas_text) {
+        canvas_text->set_coord(pos);
+    }
+}
+
+void
+TextParam::setPosAndAnchor(const Geom::Piecewise<Geom::D2<Geom::SBasis> > &pwd2,
+                           const double t, const double length, bool /*use_curvature*/)
+{
+    using namespace Geom;
+
+    Piecewise<D2<SBasis> > pwd2_reparam = arc_length_parametrization(pwd2, 2 , 0.1);
+    double t_reparam = pwd2_reparam.cuts.back() * t;
+    Point pos = pwd2_reparam.valueAt(t_reparam);
+    Point dir = unit_vector(derivative(pwd2_reparam).valueAt(t_reparam));
+    Point n = -rot90(dir);
+    double angle = Geom::angle_between(dir, Point(1,0));
+    if (canvas_text) {
+        canvas_text->set_coord(pos + n * length);
+        canvas_text->set_anchor(Geom::Point(std::sin(angle), -std::cos(angle)));
+    }
+}
+
+void
+TextParam::setAnchor(double x_value, double y_value)
+{
+    anchor_x = x_value;
+    anchor_y = y_value;
+    if (canvas_text) {
+        canvas_text->set_anchor(Geom::Point(anchor_x, anchor_y));
+    }
+}
+
+bool
+TextParam::param_readSVGValue(const gchar * strvalue)
+{
+    param_setValue(strvalue);
+    return true;
+}
+
+Glib::ustring
+TextParam::param_getSVGValue() const
+{
+    return value;
+}
+
+Glib::ustring
+TextParam::param_getDefaultSVGValue() const
+{
+    return defvalue;
+}
+
+void 
+TextParam::setTextParam(Inkscape::UI::Widget::RegisteredText *rsu) 
+{
+    Glib::ustring str(rsu->getText());
+    param_setValue(str);
+    write_to_SVG();
+}
+
+Gtk::Widget *
+TextParam::param_newWidget()
+{
+    Inkscape::UI::Widget::RegisteredText *rsu = Gtk::manage(new Inkscape::UI::Widget::RegisteredText(
+        param_label, param_tooltip, param_key, *param_wr, param_effect->getRepr(), param_effect->getSPDoc()));
+    rsu->setText(value);
+    rsu->setProgrammatically = false;
+    rsu->set_undo_parameters(_("Change text parameter"), INKSCAPE_ICON("dialog-path-effects"));
+    Gtk::Box *text_container = Gtk::manage(new Gtk::Box());
+    Gtk::Button *set =  Gtk::manage(new Gtk::Button(Glib::ustring("✔")));
+    set->signal_clicked()
+    .connect(sigc::bind<Inkscape::UI::Widget::RegisteredText *>(sigc::mem_fun(*this, &TextParam::setTextParam),rsu));
+    text_container->pack_start(*rsu, false, false, 2);
+    text_container->pack_start(*set, false, false, 2);
+    Gtk::Widget *return_widg = dynamic_cast<Gtk::Widget *> (text_container);
+    return_widg->set_halign(Gtk::ALIGN_END);
+    return return_widg;
+}
+
+void
+TextParam::param_setValue(const Glib::ustring newvalue)
+{
+    if (value != newvalue) {
+        param_effect->refresh_widgets = true;
+    }
+    value = newvalue;
+    if (canvas_text) {
+        canvas_text->set_text(newvalue);
+    }
+}
+
+} /* 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 :