/*
 * Copyright 2006, Haiku Inc.
 * Distributed under the terms of the MIT License.
 */
#ifndef LAYOUTER_H
#define LAYOUTER_H

#include <SupportDefs.h>

namespace BPrivate {
namespace Layout {

class LayoutInfo {
public:
                                                                LayoutInfo();
        virtual                                         ~LayoutInfo();

        virtual float                           ElementLocation(int32 element) = 0;
        virtual float                           ElementSize(int32 element) = 0;

        virtual float                           ElementRangeSize(int32 position, int32 length);
};


class Layouter {
public:
                                                                Layouter();
        virtual                                         ~Layouter();

        virtual void                            AddConstraints(int32 element, int32 length,
                                                                        float min, float max, float preferred) = 0;
        virtual void                            SetWeight(int32 element, float weight) = 0;

        virtual float                           MinSize() = 0;
        virtual float                           MaxSize() = 0;
        virtual float                           PreferredSize() = 0;

        virtual LayoutInfo*                     CreateLayoutInfo() = 0;
        
        virtual void                            Layout(LayoutInfo* layoutInfo, float size) = 0;

        virtual Layouter*                       CloneLayouter() = 0;
};


}       // namespace Layout
}       // namespace BPrivate

using BPrivate::Layout::LayoutInfo;
using BPrivate::Layout::Layouter;

#endif  // LAYOUTER_H