/*
 * Copyright 2006 - 2010, Haiku, Inc. All rights reserved.
 * Distributed under the terms of the MIT License.
 */
#ifndef X_TAB_H
#define X_TAB_H


#include <Archivable.h>
#include <Referenceable.h>

#include "Variable.h"


namespace BALM {


class BALMLayout;


class TabBase : public BArchivable {
private:
                                                                TabBase();
                                                                TabBase(BMessage* archive);
        virtual                                         ~TabBase();

                        friend class BALMLayout;
                        friend class XTab;
                        friend class YTab;
                        struct BALMLayoutList;

                        bool                            IsInLayout(BALMLayout* layout);
                        bool                            AddedToLayout(BALMLayout* layout);
                        void                            LayoutLeaving(BALMLayout* layout);
                        bool                            IsSuitableFor(BALMLayout* layout);

                        BALMLayoutList*         fLayouts;
};


/**
 * Vertical grid line (x-tab).
 */
class XTab : public Variable, public TabBase, public BReferenceable {
public:
        virtual                                         ~XTab();

        static  BArchivable*            Instantiate(BMessage* archive);
protected:
        friend  class                           BALMLayout;
                                                                XTab(BALMLayout* layout);

private:
                                                                XTab(BMessage* archive);
                        uint32                          _reserved[2];
};


class YTab : public Variable, public TabBase, public BReferenceable {
public:
        virtual                                         ~YTab();

        static  BArchivable*            Instantiate(BMessage* archive);
protected:
        friend  class                           BALMLayout;
                                                                YTab(BALMLayout* layout);
private:
                                                                YTab(BMessage* archive);
                        uint32                          _reserved[2];
};


}       // namespace BALM


using BALM::XTab;
using BALM::YTab;

typedef BObjectList<XTab> XTabList;
typedef BObjectList<YTab> YTabList;


#endif  // X_TAB_H