116 lines
2.5 KiB
C++
116 lines
2.5 KiB
C++
/* This file is part of the Pangolin Project.
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* http://github.com/stevenlovegrove/Pangolin
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*
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* Copyright (c) 2011 Steven Lovegrove
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include <map>
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#include <pangolin/scene/interactive.h>
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namespace pangolin {
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class InteractiveIndex
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{
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public:
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class Token
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{
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public:
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friend class InteractiveIndex;
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Token()
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: id(0)
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{
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}
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Token(Token&& o)
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: id(o.id)
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{
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o.id = 0;
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}
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GLint Id() const
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{
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return id;
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}
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~Token()
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{
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if(id) {
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InteractiveIndex::I().Unstore(*this);
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}
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}
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private:
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Token(GLint id)
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: id(id)
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{
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}
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GLint id;
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};
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static InteractiveIndex& I()
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{
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static InteractiveIndex instance;
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return instance;
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}
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Interactive* Find(GLuint id)
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{
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auto kv = index.find(id);
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if(kv != index.end()) {
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return kv->second;
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}
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return nullptr;
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}
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Token Store(Interactive* r)
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{
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index[next_id] = r;
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return Token(next_id++);
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}
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void Unstore(Token& t)
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{
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index.erase(t.id);
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t.id = 0;
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}
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private:
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// Private constructor.
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InteractiveIndex()
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: next_id(1)
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{
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}
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GLint next_id;
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std::map<GLint, Interactive*> index;
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};
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}
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