//
// Okzoniom::RPG
// Copyright (C) 2010 - 2013
//
//  - Louis SCHNELLBACH
//

#ifndef WIDGET_H_INCLUDED
#define WIDGET_H_INCLUDED

#include <SFML/Window/Mouse.hpp>
#include <SFML/Window/Event.hpp>
#include "Callback.h"
#include "../Drawable.h"
#include "../TexCoord.h"

namespace okz
{
class UI;

class Widget : public Drawable, public priv::Callback
{
    friend class UI;

public:
    static float Z_DECREMENT;
    Widget(const std::string& id, Widget* parent=NULL);
    virtual ~Widget();

    virtual void update(const sf::Event& event);
    virtual void call(const sf::Event& event);

    void setID(const std::string&);
    std::string getID() const;

    Widget* getParent();
    void addChild(Widget* w);
    void removeChild(Widget* w);
    Widget* getRootParent();

    virtual void visible(bool b);
    bool isVisible() const;

    virtual void focus(bool b);
    void focusable(bool);
    bool isFocused() const;
    bool isKeepingFocus() const;
    bool isFocusable() const;

    void movable(bool);
    bool isMovable() const;

    float setZ(float);

    virtual void setSize(const okz::fVertex&);
    virtual okz::fVertex getSize() const;
    virtual void setOffset(const okz::fVertex&);
    virtual okz::fVertex getOffset() const;
    virtual void setPosition(const okz::fVertex&);
    virtual okz::fVertex getPosition() const;

    virtual bool contains(float x, float y) const;

    virtual void initialize();
    virtual void render();
    virtual void createVBO();

protected:
    std::string _id;
    std::string _type;
    //----------------------
    bool _visible;
    bool _focus;
    bool _keepFocus;
    bool _focusable;
    bool _movable;

    std::vector<Widget*> _child;
    Widget* _parent;

    okz::fVertex _offset;
    okz::fVertex _size;

    //Specific OpenGL texture attribute
    okz::VBOTemplate<okz::TexCoord> _texCoords;
    float _shaderTime;

private:
    //Used by UI
    bool _destroyMe;
    void __propagateDestruction();
};

//Comparison functor
struct pWidget_comp
{
    bool operator() (const Widget*, const Widget*) const;
};

}
#endif // WIDGET_H_INCLUDED