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

    ValueTreeSliderAttachment.h
    Created: 4 Jun 2016 11:17:03am
    Author:  Daniel Walz

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

#ifndef VALUETREESLIDERATTACHMENT_H_INCLUDED
#define VALUETREESLIDERATTACHMENT_H_INCLUDED

#include "../JuceLibraryCode/JuceHeader.h"

class ValueTreeSliderAttachment : public Slider::Listener,
public ValueTree::Listener
{
public:
    ValueTreeSliderAttachment (ValueTree& _tree, Slider* _slider, Identifier _property)
    : tree (_tree), property (_property), updating (false)
    {
        // Don't attach an invalid valuetree!
        jassert (tree.isValid());
        slider = _slider;

        if (tree.hasProperty (property)) {
            slider->setValue (tree.getProperty(property));
        }
        else {
            tree.setProperty (property, slider->getValue(), nullptr);
        }

        tree.addListener (this);
        slider->addListener (this);
    }

    void sliderValueChanged (Slider *_slider) override
    {
        if (! updating) {
            updating = true;
            if (slider == _slider) {
                tree.setProperty (property, slider->getValue(), nullptr);
            }
            updating = false;
        }
    }

    void valueTreePropertyChanged (ValueTree &treeWhosePropertyHasChanged, const Identifier &_property) override
    {
        if (! updating) {
            updating = true;
            if (treeWhosePropertyHasChanged == tree && _property == property && slider) {
                slider->setValue (tree.getProperty (property));
            }
            updating = false;
        }
    }
    void valueTreeChildAdded (ValueTree &parentTree, ValueTree &childWhichHasBeenAdded) override {}
    void valueTreeChildRemoved (ValueTree &parentTree, ValueTree &childWhichHasBeenRemoved, int indexFromWhichChildWasRemoved) override {}
    void valueTreeChildOrderChanged (ValueTree &parentTreeWhoseChildrenHaveMoved, int oldIndex, int newIndex) override {}
    void valueTreeParentChanged (ValueTree &treeWhoseParentHasChanged) override {}
    void valueTreeRedirected (ValueTree &treeWhichHasBeenChanged) override {}


private:
    ValueTree               tree;
    Component::SafePointer<Slider>     slider;
    Identifier              property;
    bool                    updating;
};



#endif  // VALUETREESLIDERATTACHMENT_H_INCLUDED