83 lines
2.9 KiB
C++
83 lines
2.9 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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JUCE is an open source library subject to commercial or open-source
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licensing.
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The code included in this file is provided under the terms of the ISC license
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http://www.isc.org/downloads/software-support-policy/isc-license. Permission
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To use, copy, modify, and/or distribute this software for any purpose with or
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without fee is hereby granted provided that the above copyright notice and
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this permission notice appear in all copies.
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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/** This topology source holds and applies a set of rules for transforming
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one device topology into another one that may involve virtual and/or
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aggregate devices.
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Given an input PhysicalTopologySource and a set of Rule objects, this class
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will apply the rules and present the resulting topology to clients.
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@tags{Blocks}
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*/
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class RuleBasedTopologySource : public TopologySource
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{
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public:
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/** Creates a RuleBasedTopologySource which wraps another TopologySource
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passed in here.
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*/
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RuleBasedTopologySource (TopologySource&);
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/** Destructor. */
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~RuleBasedTopologySource();
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//==========================================================================
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/** Returns the currently active topology. */
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BlockTopology getCurrentTopology() const;
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/** A rule that can transform parts of a topology. */
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struct Rule
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{
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virtual ~Rule() {}
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/** Subclasses should implement this method and use it as their opportunity to
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examine the given topology and modify it. For example they may want to substitute
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one or more blocks for more specialised, aggregated Block objects.
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*/
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virtual void transformTopology (BlockTopology&) = 0;
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};
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/** Clears the list of active rules.
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Calling this method will cause an asynchronous topology update if the new rule-set
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results in a change to the topology.
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*/
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void clearRules();
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/** Adds a rule to the list that will be applied.
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The object passed-in will be owned by this object, so don't keep any references
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to it.
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Calling this method will cause an asynchronous topology update if the new rule-set
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results in a change to the topology.
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*/
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void addRule (Rule*);
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private:
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//==========================================================================
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struct Internal;
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std::unique_ptr<Internal> internal;
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};
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} // namespace juce
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