93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
// Filename: onTransition.h
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// Created by: drose (22Mar00)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) 2001, Disney Enterprises, Inc. All rights reserved
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//
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// All use of this software is subject to the terms of the Panda 3d
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// Software license. You should have received a copy of this license
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// along with this source code; you will also find a current copy of
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// the license at http://www.panda3d.org/license.txt .
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//
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// To contact the maintainers of this program write to
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// panda3d@yahoogroups.com .
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//
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////////////////////////////////////////////////////////////////////
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#ifndef ONTRANSITION_H
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#define ONTRANSITION_H
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#include <pandabase.h>
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#include "nodeTransition.h"
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class NodeRelation;
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////////////////////////////////////////////////////////////////////
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// Class : OnTransition
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// Description : This is an abstract class that encapsulates a family
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// of transitions for states that are always on, in one
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// state or another. It's similar to OnOffTransition,
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// except the state can never be 'off'; it is always on
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// in some sense.
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//
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// Most scene graph attributes that have an enumerated
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// set of states fall into this category.
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//
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// There is no explicit identity transition. Each
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// transition always changes the state.
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////////////////////////////////////////////////////////////////////
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class EXPCL_PANDA OnTransition : public NodeTransition {
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protected:
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INLINE_GRAPH OnTransition();
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INLINE_GRAPH OnTransition(const OnTransition ©);
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INLINE_GRAPH void operator = (const OnTransition ©);
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public:
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virtual NodeTransition *compose(const NodeTransition *other) const;
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virtual NodeTransition *invert() const;
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virtual void output(ostream &out) const;
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virtual void write(ostream &out, int indent_level = 0) const;
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protected:
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virtual int internal_compare_to(const NodeTransition *other) const;
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virtual void set_value_from(const OnTransition *other)=0;
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virtual int compare_values(const OnTransition *other) const=0;
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virtual void output_value(ostream &out) const=0;
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virtual void write_value(ostream &out, int indent_level) const=0;
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//No new data is defined in OnTransition, and OnTransition is only
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//an Abstract class, so no Read/Write methods are defined
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public:
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virtual TypeHandle get_type() const {
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return get_class_type();
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}
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virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
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PUBLISHED:
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static TypeHandle get_class_type() {
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return _type_handle;
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}
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public:
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static void init_type() {
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NodeTransition::init_type();
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register_type(_type_handle, "OnTransition",
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NodeTransition::get_class_type());
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}
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private:
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static TypeHandle _type_handle;
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};
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#ifndef DONT_INLINE_GRAPH
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#include "onTransition.I"
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#endif
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#endif
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