better fix for lpe stack forking

[inkscape.git] / src / live_effects / parameter / text.cpp

diff --git a/src/live_effects/parameter/text.cpp b/src/live_effects/parameter/text.cpp
index bf11192dd23cf5778947f4cf93260f310fb8595e..0c0c3d69ce360c157d0bba2862ea624f6f504330 100644 (file)
--- a/src/live_effects/parameter/text.cpp
+++ b/src/live_effects/parameter/text.cpp
@@ -19,6 +19,8 @@
 #include "ui/widget/registered-widget.h"
 #include "inkscape.h"
 #include "verbs.h"
+#include "display/canvas-text.h"
+#include <2geom/sbasis-geometric.h>
 
 namespace Inkscape {
 
@@ -31,15 +33,12 @@ TextParam::TextParam( const Glib::ustring& label, const Glib::ustring& tip,
       value(default_value),
       defvalue(default_value)
 {
-    canvas_text = (SPCanvasText *) sp_canvastext_new(sp_desktop_tempgroup(inkscape_active_desktop()), Geom::Point(0,0), "");
+    SPDesktop *desktop = inkscape_active_desktop(); // FIXME: we shouldn't use this!
+    canvas_text = (SPCanvasText *) sp_canvastext_new(sp_desktop_tempgroup(desktop), desktop, Geom::Point(0,0), "");
     sp_canvastext_set_text (canvas_text, default_value.c_str());
     sp_canvastext_set_coords (canvas_text, 0, 0);
 }
 
-TextParam::~TextParam()
-{
-}
-
 void
 TextParam::param_set_default()
 {
@@ -52,6 +51,23 @@ TextParam::setPos(Geom::Point pos)
     sp_canvastext_set_coords (canvas_text, 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));
+
+    sp_canvastext_set_coords(canvas_text, pos + n * length);
+    sp_canvastext_set_anchor(canvas_text, std::sin(angle), -std::cos(angle));
+}
+
 void
 TextParam::setAnchor(double x_value, double y_value)
 {