JUCE/extras/AudioPluginHost/Source/Plugins/PluginGraph.h

/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   JUCE is an open source library subject to commercial or open-source
   licensing.

   By using JUCE, you agree to the terms of both the JUCE 5 End-User License
   Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
   27th April 2017).

   End User License Agreement: www.juce.com/juce-5-licence
   Privacy Policy: www.juce.com/juce-5-privacy-policy

   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

#pragma once

#include "../UI/PluginWindow.h"


//==============================================================================
/**
    A collection of plugins and some connections between them.
*/
class PluginGraph   : public FileBasedDocument,
                      public AudioProcessorListener,
                      private ChangeListener
{
public:
    //==============================================================================
    PluginGraph (AudioPluginFormatManager&);
    ~PluginGraph() override;

    //==============================================================================
    using NodeID = AudioProcessorGraph::NodeID;

    void addPlugin (const PluginDescription&, Point<double>);

    AudioProcessorGraph::Node::Ptr getNodeForName (const String& name) const;

    void setNodePosition (NodeID, Point<double>);
    Point<double> getNodePosition (NodeID) const;

    //==============================================================================
    void clear();

    PluginWindow* getOrCreateWindowFor (AudioProcessorGraph::Node*, PluginWindow::Type);
    void closeCurrentlyOpenWindowsFor (AudioProcessorGraph::NodeID);
    bool closeAnyOpenPluginWindows();

    //==============================================================================
    void audioProcessorParameterChanged (AudioProcessor*, int, float) override {}
    void audioProcessorChanged (AudioProcessor*) override { changed(); }

    //==============================================================================
    std::unique_ptr<XmlElement> createXml() const;
    void restoreFromXml (const XmlElement&);

    static const char* getFilenameSuffix()      { return ".filtergraph"; }
    static const char* getFilenameWildcard()    { return "*.filtergraph"; }

    //==============================================================================
    void newDocument();
    String getDocumentTitle() override;
    Result loadDocument (const File& file) override;
    Result saveDocument (const File& file) override;
    File getLastDocumentOpened() override;
    void setLastDocumentOpened (const File& file) override;

    static File getDefaultGraphDocumentOnMobile();

    //==============================================================================
    AudioProcessorGraph graph;

private:
    //==============================================================================
    AudioPluginFormatManager& formatManager;
    OwnedArray<PluginWindow> activePluginWindows;

    NodeID lastUID;
    NodeID getNextUID() noexcept;

    void createNodeFromXml (const XmlElement&);
    void addPluginCallback (std::unique_ptr<AudioPluginInstance>, const String& error, Point<double>);
    void changeListenerCallback (ChangeBroadcaster*) override;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (PluginGraph)
};