New LPE: path length

diff --git a/src/live_effects/Makefile_insert b/src/live_effects/Makefile_insert
index ea432e4c37a442714bfb4182e167c25c19830009..85f58d06dc3181fbdbd353cec8991f7a06374e32 100644 (file)
--- a/src/live_effects/Makefile_insert
+++ b/src/live_effects/Makefile_insert
@@ -70,5 +70,6 @@ live_effects_liblive_effects_a_SOURCES = \
        live_effects/lpe-ruler.cpp      \
        live_effects/lpe-ruler.h        \
        live_effects/lpe-text_label.cpp \
-       live_effects/lpe-text_label.h
-
+       live_effects/lpe-text_label.h   \
+       live_effects/lpe-path_length.cpp        \
+       live_effects/lpe-path_length.h

diff --git a/src/live_effects/effect.cpp b/src/live_effects/effect.cpp
index 701b46d36e63433a9ef4aefa79822c280623f14c..b0cebab8dacf7d05392f60d00025725002f5b97b 100644 (file)
--- a/src/live_effects/effect.cpp
+++ b/src/live_effects/effect.cpp
@@ -64,6 +64,7 @@
 #include "live_effects/lpe-boolops.h"
 #include "live_effects/lpe-interpolate.h"
 #include "live_effects/lpe-text_label.h"
+#include "live_effects/lpe-path_length.h"
 // end of includes
 
 namespace Inkscape {
@@ -90,6 +91,7 @@ const Util::EnumData<EffectType> LPETypeData[] = {
     {MIRROR_SYMMETRY,       N_("Mirror symmetry"),         "mirror_symmetry"},
     {OFFSET,                N_("Offset"),                  "offset"},
     {PARALLEL,              N_("Parallel"),                "parallel"},
+    {PATH_LENGTH,           N_("Path length"),             "path_length"},
     {PATTERN_ALONG_PATH,    N_("Pattern Along Path"),      "skeletal"},   // for historic reasons, this effect is called skeletal(strokes) in Inkscape:SVG
     {PERP_BISECTOR,         N_("Perpendicular bisector"),  "perp_bisector"},
     {PERSPECTIVE_PATH,      N_("Perspective path"),        "perspective_path"},
@@ -192,6 +194,9 @@ Effect::New(EffectType lpenr, LivePathEffectObject *lpeobj)
         case TEXT_LABEL:
             neweffect = static_cast<Effect*> ( new LPETextLabel(lpeobj) );
             break;
+        case PATH_LENGTH:
+            neweffect = static_cast<Effect*> ( new LPEPathLength(lpeobj) );
+            break;
         default:
             g_warning("LivePathEffect::Effect::New   called with invalid patheffect type (%d)", lpenr);
             neweffect = NULL;

diff --git a/src/live_effects/effect.h b/src/live_effects/effect.h
index 859c0ff7bccf474a47a71ff0d7d86515a76d4aa3..1235087513598cd49b586fdd8c414920c5328e68 100644 (file)
--- a/src/live_effects/effect.h
+++ b/src/live_effects/effect.h
@@ -80,6 +80,7 @@ enum EffectType {
     BOOLOPS,
     INTERPOLATE,
     TEXT_LABEL,
+    PATH_LENGTH,
     INVALID_LPE // This must be last
 };
 

diff --git a/src/live_effects/lpe-path_length.cpp b/src/live_effects/lpe-path_length.cpp
new file mode 100644 (file)
index 0000000..d2aea13
--- /dev/null
+++ b/src/live_effects/lpe-path_length.cpp
@@ -0,0 +1,72 @@
+#define INKSCAPE_LPE_PATH_LENGTH_CPP
+/** \file
+ * LPE <path_length> implementation.
+ */
+/*
+ * Authors:
+ *   Maximilian Albert <maximilian.albert@gmail.com>
+ *   Johan Engelen
+ *
+ * Copyright (C) 2007-2008 Authors
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#include "live_effects/lpe-path_length.h"
+
+#include "2geom/sbasis-geometric.h"
+
+namespace Inkscape {
+namespace LivePathEffect {
+
+LPEPathLength::LPEPathLength(LivePathEffectObject *lpeobject) :
+    Effect(lpeobject),
+    info_text(_("Info text"), _("Parameter for text creation"), "info_text", &wr, this, "")
+{
+    /* uncomment the next line if you want the original path to be
+       permanently displayed as a helperpath while the item is selected */
+    //show_orig_path = true;
+
+    registerParameter(dynamic_cast<Parameter *>(&info_text));
+}
+
+LPEPathLength::~LPEPathLength()
+{
+
+}
+
+Geom::Piecewise<Geom::D2<Geom::SBasis> >
+LPEPathLength::doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in)
+{
+    using namespace Geom;
+
+    gchar *arc_length = g_strdup_printf("%.2f", Geom::length(pwd2_in));
+    info_text.param_setValue(arc_length);
+    g_free(arc_length);
+
+    info_text.setPosAndAnchor(pwd2_in, 0.5, 20);
+
+    Piecewise<D2<SBasis> > A = integral(pwd2_in);
+    Point c;
+    double area;
+    if (centroid(pwd2_in, c, area)) {
+        g_print ("Area is zero\n");
+    }
+    //g_print ("Area: %f\n", area);
+
+    return pwd2_in;
+}
+
+} //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 :

diff --git a/src/live_effects/lpe-path_length.h b/src/live_effects/lpe-path_length.h
new file mode 100644 (file)
index 0000000..db4993d
--- /dev/null
+++ b/src/live_effects/lpe-path_length.h
@@ -0,0 +1,51 @@
+#ifndef INKSCAPE_LPE_PATH_LENGTH_H
+#define INKSCAPE_LPE_PATH_LENGTH_H
+
+/** \file
+ * LPE <path_length> implementation.
+ */
+
+/*
+ * Authors:
+ *   Maximilian Albert <maximilian.albert@gmail.com>
+ *   Johan Engelen
+ *
+ * Copyright (C) 2007-2008 Authors
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#include "live_effects/effect.h"
+#include "live_effects/parameter/text.h"
+
+namespace Inkscape {
+namespace LivePathEffect {
+
+class LPEPathLength : public Effect {
+public:
+    LPEPathLength(LivePathEffectObject *lpeobject);
+    virtual ~LPEPathLength();
+
+    virtual Geom::Piecewise<Geom::D2<Geom::SBasis> > doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in);
+
+private:
+    LPEPathLength(const LPEPathLength&);
+    LPEPathLength& operator=(const LPEPathLength&);
+    TextParam info_text;
+};
+
+} //namespace LivePathEffect
+} //namespace Inkscape
+
+#endif
+
+/*
+  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 :