//##################################################################################################
//
//   Custom Visualization Core library
//   Copyright (C) 2011-2012 Ceetron AS
//    
//   This library is free software: you can redistribute it and/or modify 
//   it under the terms of the GNU General Public License as published by 
//   the Free Software Foundation, either version 3 of the License, or 
//   (at your option) any later version. 
//    
//   This library is distributed in the hope that it will be useful, but WITHOUT ANY 
//   WARRANTY; without even the implied warranty of MERCHANTABILITY or 
//   FITNESS FOR A PARTICULAR PURPOSE.   
//    
//   See the GNU General Public License at <<http://www.gnu.org/licenses/gpl.html>> 
//   for more details. 
//
//##################################################################################################

#pragma once

#include "cvfObject.h"
#include "cvfVector2.h"
#include "cvfRect.h"

namespace cvf {



class OpenGLContext;


//==================================================================================================
//
// Interface for overlay items
//
//==================================================================================================
class OverlayItem : public Object
{
public:
    enum LayoutCorner
    {
        TOP_LEFT,       
        TOP_RIGHT,      
        BOTTOM_LEFT,    
        BOTTOM_RIGHT,
        UNMANAGED
    };

    enum LayoutDirection
    {
        HORIZONTAL,    
        VERTICAL       
    };

public:
    virtual Vec2ui  sizeHint()  = 0;        // In Pixels
    virtual Vec2ui  maximumSize() = 0;      // In Pixels
    virtual Vec2ui  minimumSize() = 0;      // In Pixels
    
    cvf::Vec2i      unmanagedPosition() const            { return m_unmanagedPosition; }
    void            setUnmanagedPosition(cvf::Vec2i val) { m_unmanagedPosition = val;  }

    virtual void    render(OpenGLContext* oglContext, const Vec2i& position, const Vec2ui& size) = 0;
    virtual void    renderSoftware(OpenGLContext* oglContext, const Vec2i& position, const Vec2ui& size) = 0;
    virtual bool    pick(int oglXCoord, int oglYCoord, const Vec2i& position, const Vec2ui& size);

private:
    Vec2i m_unmanagedPosition;

};

}