--- /dev/null
+/* === S Y N F I G ========================================================= */
+/*! \file valuenode_step.cpp
+** \brief Implementation of the "Step" valuenode conversion.
+**
+** $Id$
+**
+** \legal
+** Copyright (c) 2008 Chris Moore
+**
+** This package is free software; you can redistribute it and/or
+** modify it under the terms of the GNU General Public License as
+** published by the Free Software Foundation; either version 2 of
+** the License, or (at your option) any later version.
+**
+** This package is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+** General Public License for more details.
+** \endlegal
+*/
+/* ========================================================================= */
+
+/* === H E A D E R S ======================================================= */
+
+#ifdef USING_PCH
+# include "pch.h"
+#else
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "valuenode_step.h"
+#include "valuenode_const.h"
+#include "general.h"
+#include "color.h"
+#include <ETL/misc>
+
+#endif
+
+/* === U S I N G =========================================================== */
+
+using namespace std;
+using namespace etl;
+using namespace synfig;
+
+/* === M A C R O S ========================================================= */
+
+/* === G L O B A L S ======================================================= */
+
+/* === P R O C E D U R E S ================================================= */
+
+/* === M E T H O D S ======================================================= */
+
+ValueNode_Step::ValueNode_Step(const ValueBase &value):
+ LinkableValueNode(value.get_type())
+{
+ set_link("duration", ValueNode_Const::create(Time(1)));
+ set_link("start_time", ValueNode_Const::create(Time(0)));
+ set_link("intersection", ValueNode_Const::create(Real(0.5)));
+
+ switch(get_type())
+ {
+ case ValueBase::TYPE_ANGLE:
+ set_link("link",ValueNode_Const::create(value.get(Angle())));
+ break;
+ case ValueBase::TYPE_COLOR:
+ set_link("link",ValueNode_Const::create(value.get(Color())));
+ break;
+ case ValueBase::TYPE_INTEGER:
+ set_link("link",ValueNode_Const::create(value.get(int())));
+ break;
+ case ValueBase::TYPE_REAL:
+ set_link("link",ValueNode_Const::create(value.get(Real())));
+ break;
+ case ValueBase::TYPE_TIME:
+ set_link("link",ValueNode_Const::create(value.get(Time())));
+ break;
+ case ValueBase::TYPE_VECTOR:
+ set_link("link",ValueNode_Const::create(value.get(Vector())));
+ break;
+ default:
+ throw Exception::BadType(ValueBase::type_local_name(get_type()));
+ }
+
+ DCAST_HACK_ENABLE();
+}
+
+LinkableValueNode*
+ValueNode_Step::create_new()const
+{
+ return new ValueNode_Step(get_type());
+}
+
+ValueNode_Step*
+ValueNode_Step::create(const ValueBase &x)
+{
+ return new ValueNode_Step(x);
+}
+
+ValueNode_Step::~ValueNode_Step()
+{
+ unlink_all();
+}
+
+ValueBase
+ValueNode_Step::operator()(Time t)const
+{
+ if (getenv("SYNFIG_DEBUG_VALUENODE_OPERATORS"))
+ printf("%s:%d operator()\n", __FILE__, __LINE__);
+
+ Time duration ((*duration_ )(t).get(Time()));
+ Time start_time ((*start_time_ )(t).get(Time()));
+ Real intersection((*intersection_)(t).get(Real()));
+
+ t = (floor((t - start_time) / duration) + intersection) * duration + start_time;
+
+ switch(get_type())
+ {
+ case ValueBase::TYPE_ANGLE: return (*link_)(t).get( Angle());
+ case ValueBase::TYPE_COLOR: return (*link_)(t).get( Color());
+ case ValueBase::TYPE_INTEGER: return (*link_)(t).get( int());
+ case ValueBase::TYPE_REAL: return (*link_)(t).get( Real());
+ case ValueBase::TYPE_TIME: return (*link_)(t).get( Time());
+ case ValueBase::TYPE_VECTOR: return (*link_)(t).get(Vector());
+ default:
+ assert(0);
+ return ValueBase();
+ }
+}
+
+
+String
+ValueNode_Step::get_name()const
+{
+ return "step";
+}
+
+String
+ValueNode_Step::get_local_name()const
+{
+ return _("Step");
+}
+
+bool
+ValueNode_Step::check_type(ValueBase::Type type)
+{
+ return
+ type==ValueBase::TYPE_ANGLE ||
+ type==ValueBase::TYPE_COLOR ||
+ type==ValueBase::TYPE_INTEGER ||
+ type==ValueBase::TYPE_REAL ||
+ type==ValueBase::TYPE_TIME ||
+ type==ValueBase::TYPE_VECTOR ;
+}
+
+bool
+ValueNode_Step::set_link_vfunc(int i,ValueNode::Handle value)
+{
+ assert(i>=0 && i<link_count());
+
+ switch(i)
+ {
+ case 0: CHECK_TYPE_AND_SET_VALUE(link_, get_type());
+ case 1: CHECK_TYPE_AND_SET_VALUE(duration_, ValueBase::TYPE_TIME);
+ case 2: CHECK_TYPE_AND_SET_VALUE(start_time_, ValueBase::TYPE_TIME);
+ case 3: CHECK_TYPE_AND_SET_VALUE(intersection_, ValueBase::TYPE_REAL);
+ }
+ return false;
+}
+
+ValueNode::LooseHandle
+ValueNode_Step::get_link_vfunc(int i)const
+{
+ assert(i>=0 && i<link_count());
+
+ switch(i)
+ {
+ case 0: return link_;
+ case 1: return duration_;
+ case 2: return start_time_;
+ case 3: return intersection_;
+ default:
+ return 0;
+ }
+}
+
+int
+ValueNode_Step::link_count()const
+{
+ return 4;
+}
+
+String
+ValueNode_Step::link_name(int i)const
+{
+ assert(i>=0 && i<link_count());
+
+ switch(i)
+ {
+ case 0: return "link";
+ case 1: return "duration";
+ case 2: return "start_time";
+ case 3: return "intersection";
+ default:
+ return String();
+ }
+}
+
+String
+ValueNode_Step::link_local_name(int i)const
+{
+ assert(i>=0 && i<link_count());
+
+ switch(i)
+ {
+ case 0: return _("Link");
+ case 1: return _("Duration");
+ case 2: return _("Start Time");
+ case 3: return _("Intersection");
+ default:
+ return String();
+ }
+}
+
+int
+ValueNode_Step::get_link_index_from_name(const String &name)const
+{
+ if(name=="link") return 0;
+ if(name=="duration") return 1;
+ if(name=="start_time") return 2;
+ if(name=="intersection") return 3;
+
+ throw Exception::BadLinkName(name);
+}
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