FilterGraphEditor.h

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* ngscopeclient                                                                                                        *
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* Copyright (c) 2012-2026 Andrew D. Zonenberg and contributors                                                         *
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#ifndef FilterGraphEditor_h
#define FilterGraphEditor_h
 
#include "Dialog.h"
#include "Session.h"
#include "Bijection.h"
#include "FilterGraphErrorWindow.h"
class EmbeddableDialog;
 
#include <imgui_node_editor.h>
#include <imgui_node_editor_internal.h>
 
#include <typeinfo>
#include <typeindex>
 
template<class T>
class lessID
{
public:
    bool operator()(const T& a, const T& b) const
    { return a.AsPointer() < b.AsPointer(); }
};
 
class lessIDPair
{
public:
    bool operator()(
        const std::pair<ax::NodeEditor::PinId, ax::NodeEditor::PinId>& a,
        const std::pair<ax::NodeEditor::PinId, ax::NodeEditor::PinId>& b) const
    {
        auto fpa = a.first.AsPointer();
        auto fpb = b.first.AsPointer();
        if(fpa < fpb)
            return true;
        else if(fpa > fpb)
            return false;
        else
            return a.second.AsPointer() < b.second.AsPointer();
    }
};
 
class FilterGraphEditor;
 
class FilterGraphGroup : public SerializableObject
{
public:
 
    FilterGraphGroup(FilterGraphEditor& ed);
 
    std::string m_name;
 
    ax::NodeEditor::NodeId m_id;
 
    ax::NodeEditor::NodeId m_outputId;
 
    ax::NodeEditor::NodeId m_inputId;
 
    std::set<ax::NodeEditor::NodeId, lessID<ax::NodeEditor::NodeId> > m_children;
 
    std::set<ax::NodeEditor::PinId, lessID<ax::NodeEditor::PinId> > m_childSourcePins;
 
    std::set<ax::NodeEditor::PinId, lessID<ax::NodeEditor::PinId> > m_childSinkPins;
 
    Bijection<
        StreamDescriptor,
        ax::NodeEditor::PinId,
        std::less<StreamDescriptor>,
        lessID<ax::NodeEditor::PinId> > m_hierOutputMap;
 
    Bijection<
        StreamDescriptor,
        ax::NodeEditor::PinId,
        std::less<StreamDescriptor>,
        lessID<ax::NodeEditor::PinId> > m_hierOutputInternalMap;
 
    Bijection<
        StreamDescriptor,
        ax::NodeEditor::LinkId,
        std::less<StreamDescriptor>,
        lessID<ax::NodeEditor::LinkId> > m_hierOutputLinkMap;
 
    Bijection<
        std::pair<FlowGraphNode*, int>,
        ax::NodeEditor::PinId,
        std::less< std::pair<FlowGraphNode*, int> >,
        lessID<ax::NodeEditor::PinId> > m_hierInputMap;
 
    Bijection<
        std::pair<FlowGraphNode*, int>,
        ax::NodeEditor::PinId,
        std::less< std::pair<FlowGraphNode*, int> >,
        lessID<ax::NodeEditor::PinId> > m_hierInputInternalMap;
 
    Bijection<
        std::pair<FlowGraphNode*, int>,
        ax::NodeEditor::LinkId,
        std::less< std::pair<FlowGraphNode*, int> >,
        lessID<ax::NodeEditor::LinkId> > m_hierInputLinkMap;
 
    void RefreshChildren();
    void RefreshLinks();
    void MoveBy(ImVec2 displacement);
 
protected:
    FilterGraphEditor& m_parent;
};
 
class FilterGraphEditor : public Dialog
{
public:
    FilterGraphEditor(Session& session, MainWindow* parent);
    virtual ~FilterGraphEditor();
 
    virtual bool Render();
    virtual bool DoRender();
 
    std::map<uintptr_t, std::string> GetGroupIDs();
 
    static bool IsBackEdge(FlowGraphNode* src, FlowGraphNode* dst);
 
    FilterGraphErrorWindow& GetErrorWindow()
    { return m_errorWindow; }
 
protected:
 
    friend class FilterGraphGroup;
 
    std::map<std::shared_ptr<Instrument>, std::vector<InstrumentChannel*> > GetAllVisibleChannels();
    std::vector<FlowGraphNode*> GetAllNodes();
 
    void RefreshGroupPorts();
 
    ax::NodeEditor::PinId CanonicalizePin(ax::NodeEditor::PinId port);
 
    void InputPortTooltip(FlowGraphNode* node, size_t idx);
    void OutputPortTooltip(StreamDescriptor stream);
    void DoNodeForGroup(std::shared_ptr<FilterGraphGroup> group);
    void DoInternalLinksForGroup(std::shared_ptr<FilterGraphGroup> group);
    void DoNodeForGroupOutputs(std::shared_ptr<FilterGraphGroup> group);
    void DoNodeForGroupInputs(std::shared_ptr<FilterGraphGroup> group);
    void DoNodeForChannel(
        InstrumentChannel* channel,
        std::shared_ptr<Instrument> inst,
        bool multiInst,
        int64_t runtime);
    void DoNodeForTrigger(Trigger* trig);
    bool HandleNodeProperties();
    void HandleDoubleClicks();
    void HandleLinkCreationRequests(Filter*& fReconfigure);
    void HandleDeletionRequests(Filter*& fReconfigure);
    bool OnNodeDeleted(FlowGraphNode* node);
    bool OnFilterDeleted(Filter* node);
    void HandleBackgroundContextMenu(bool windowHovered);
    void DoAddMenu();
 
    void HandleOverlaps();
    void CalculateNodeForces(
        const std::vector<ax::NodeEditor::NodeId>& nodes,
        const std::vector<bool>& isgroup,
        const std::vector<bool>& dragging,
        const std::vector<bool>& nocollide,
        const std::vector<ImVec2>& positions,
        const std::vector<ImVec2>& sizes,
        std::vector<ImVec2>& forces);
    void ApplyNodeForces(
        const std::vector<ax::NodeEditor::NodeId>& nodes,
        const std::vector<bool>& isgroup,
        const std::vector<bool>& dragging,
        const std::vector<ImVec2>& positions,
        std::vector<ImVec2>& forces);
 
    void SetCanvasManagedDPI();
    void SetImGuiManagedDPI();
 
    void ClearOldPropertiesDialogs();
 
    void NodeIcon(InstrumentChannel* chan, ImVec2 iconpos, ImVec2 iconsize, ImDrawList* list);
 
    void FilterMenu(StreamDescriptor src);
    void FilterSubmenu(StreamDescriptor src, const std::string& name, Filter::Category cat);
    void CreateChannelMenu();
 
    ax::NodeEditor::Config m_config;
 
    ax::NodeEditor::EditorContext* m_context;
 
    Bijection<
        StreamDescriptor,
        ax::NodeEditor::PinId,
        std::less<StreamDescriptor>,
        lessID<ax::NodeEditor::PinId> > m_streamIDMap;
 
    Bijection<
        std::pair<FlowGraphNode*, int>,
        ax::NodeEditor::PinId,
        std::less< std::pair<FlowGraphNode*, int> >,
        lessID<ax::NodeEditor::PinId> > m_inputIDMap;
 
    Bijection<
        std::pair<ax::NodeEditor::PinId, ax::NodeEditor::PinId>,
        ax::NodeEditor::LinkId,
        lessIDPair,
        lessID<ax::NodeEditor::LinkId> > m_linkMap;
 
    Bijection<FlowGraphNode*, std::shared_ptr<FilterGraphGroup> > m_nodeGroupMap;
 
    uintptr_t m_nextID;
 
    ax::NodeEditor::NodeId GetID(FlowGraphNode* node);
 
    ax::NodeEditor::NodeId GetID(InstrumentChannel* chan)
    { return m_session->m_idtable.emplace(chan); }
 
    ax::NodeEditor::NodeId GetID(Trigger* trig)
    { return m_session->m_idtable.emplace(trig); }
 
    ax::NodeEditor::NodeId GetID(std::shared_ptr<FilterGraphGroup> group)
    { return m_session->m_idtable.emplace(group.get()); }
 
    uintptr_t AllocateID();
    ax::NodeEditor::PinId GetID(StreamDescriptor stream);
    ax::NodeEditor::PinId GetID(std::pair<FlowGraphNode*, size_t> input);
    ax::NodeEditor::LinkId GetID(std::pair<ax::NodeEditor::PinId, ax::NodeEditor::PinId> link);
 
    ax::NodeEditor::PinId GetSourcePinForLink(StreamDescriptor source, FlowGraphNode* sink);
    ax::NodeEditor::PinId GetSinkPinForLink(StreamDescriptor source, std::pair<FlowGraphNode*, int> sink);
 
    StreamDescriptor m_newFilterSourceStream;
 
    std::map<
        ax::NodeEditor::NodeId,
        std::shared_ptr<EmbeddableDialog>,
        lessID<ax::NodeEditor::NodeId> > m_propertiesDialogs;
 
    ax::NodeEditor::NodeId m_selectedProperties;
 
    ImVec2 m_createMousePos;
 
    std::pair<FlowGraphNode*, int> m_createInput;
 
    Bijection<
        std::shared_ptr<FilterGraphGroup>,
        ax::NodeEditor::NodeId,
        std::less< std::shared_ptr<FilterGraphGroup> >,
        lessID<ax::NodeEditor::NodeId>
         > m_groups;
 
    //DEBUG: forces for display
    std::map<
        ax::NodeEditor::NodeId,
        ImVec2,
        lessID<ax::NodeEditor::NodeId>
        > m_nodeForces;
 
    //DEBUG: render vector for force
    void RenderForceVector(ImDrawList* list, ImVec2 pos, ImVec2 size, ImVec2 vec);
 
    // Serialization
 
    static bool SaveSettingsCallback(
        const char* data,
        size_t size,
        ax::NodeEditor::SaveReasonFlags flags,
        void* pThis);
 
    static size_t LoadSettingsCallback(char* data, void* pThis);
 
    //Error message window
    FilterGraphErrorWindow m_errorWindow;
};
 
#endif