New LPE: Text label

(bzr r6472)

1 files changed, 61 insertions, 0 deletions

diff --git a/src/live_effects/lpe-text_label.cpp b/src/live_effects/lpe-text_label.cpp
new file mode 100644
index 000000000..c986dbd63
--- /dev/null
+++ b/src/live_effects/lpe-text_label.cpp
@@ -0,0 +1,61 @@
+#define INKSCAPE_LPE_TEXT_LABEL_CPP
+/** \file
+ * LPE <text_label> implementation
+ */
+/*
+ * Authors:
+ *   Maximilian Albert
+ *   Johan Engelen
+ *
+ * Copyright (C) Maximilian Albert 2008 <maximilian.albert@gmail.com>
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#include "live_effects/lpe-text_label.h"
+
+namespace Inkscape {
+namespace LivePathEffect {
+
+LPETextLabel::LPETextLabel(LivePathEffectObject *lpeobject) :
+    Effect(lpeobject),
+    label(_("Label"), _("Text label attached to the path"), "label", &wr, this, "This is a label")
+{
+    registerParameter( dynamic_cast<Parameter *>(&label) );
+}
+
+LPETextLabel::~LPETextLabel()
+{
+
+}
+
+Geom::Piecewise<Geom::D2<Geom::SBasis> >
+LPETextLabel::doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in)
+{
+    using namespace Geom;
+
+    double t = (pwd2_in.cuts.front() + pwd2_in.cuts.back()) / 2;
+    Point pos(pwd2_in.valueAt(t));
+    Point dir(unit_vector(derivative(pwd2_in).valueAt(t)));
+    Point n(-rot90(dir) * 30);
+
+    double angle = angle_between(dir, Point(1,0));
+    label.setPos(pos + n);
+    label.setAnchor(std::sin(angle), -std::cos(angle));
+
+    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 :