juce_RelativeCoordinatePositioner.h

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/*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited
 
   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 7 End-User License
   Agreement and JUCE Privacy Policy.
 
   End User License Agreement: www.juce.com/juce-7-licence
   Privacy Policy: www.juce.com/juce-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.
 
  ==============================================================================
*/
 
namespace juce
{
 
//==============================================================================
class JUCE_API  RelativeCoordinatePositionerBase  : public Component::Positioner,
                                                    public ComponentListener,
                                                    public MarkerList::Listener
{
public:
    RelativeCoordinatePositionerBase (Component&);
    ~RelativeCoordinatePositionerBase() override;
 
    void componentMovedOrResized (Component&, bool, bool) override;
    void componentParentHierarchyChanged (Component&) override;
    void componentChildrenChanged (Component&) override;
    void componentBeingDeleted (Component&) override;
    void markersChanged (MarkerList*) override;
    void markerListBeingDeleted (MarkerList*) override;
 
    void apply();
 
    bool addCoordinate (const RelativeCoordinate&);
    bool addPoint (const RelativePoint&);
 
    //==============================================================================
    class ComponentScope  : public Expression::Scope
    {
    public:
        ComponentScope (Component&);
 
        Expression getSymbolValue (const String& symbol) const override;
        void visitRelativeScope (const String& scopeName, Visitor&) const override;
        String getScopeUID() const override;
 
    protected:
        Component& component;
 
        Component* findSiblingComponent (const String& componentID) const;
    };
 
protected:
    virtual bool registerCoordinates() = 0;
    virtual void applyToComponentBounds() = 0;
 
private:
    class DependencyFinderScope;
    friend class DependencyFinderScope;
    Array<Component*> sourceComponents;
    Array<MarkerList*> sourceMarkerLists;
    bool registeredOk;
 
    void registerComponentListener (Component&);
    void registerMarkerListListener (MarkerList*);
    void unregisterListeners();
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (RelativeCoordinatePositionerBase)
};
 
} // namespace juce