// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.GWT.forms.client.nonpublic;

import java.io.*;

import org.litesoft.GWT.client.widgets.*;
import org.litesoft.ui.def.nonpublic.support.*;

import com.google.gwt.user.client.ui.*;

public class TabSubFormRowCarrier implements SubFormRowCarrier
{
    private SizeableSelectorPanel mSelectorPanel;

    public TabSubFormRowCarrier( SizeableSelectorPanel pSelectorPanel )
    {
        mSelectorPanel = pSelectorPanel;
    }

    public void dispose()
    {
        if ( mSelectorPanel != null )
        {
            clear();
            mSelectorPanel = null;
        }
    }

    public void clear()
    {
        int zTabCount = mSelectorPanel.getTabCount();
        while ( --zTabCount >= 0 )
        {
            mSelectorPanel.removeTab( zTabCount );
        }
    }

    public void remove( Widget pWidget )
    {
        int zIndex = mSelectorPanel.indexOfTabBodyWith( pWidget );
        if ( zIndex != -1 )
        {
            mSelectorPanel.removeTab( zIndex );
        }
    }

    public void insert( Widget pWidget, int pBeforeIndex )
    {
        int zIndex = mSelectorPanel.indexOfTabBodyWith( pWidget );
        if ( zIndex == -1 )
        {
            int zTabCount = mSelectorPanel.getTabCount();
            mSelectorPanel.insertTab( pBeforeIndex, "Tab: " + zTabCount, pWidget );
        }
        else if ( pBeforeIndex != zIndex )
        {
            mSelectorPanel.moveTab( zIndex, pBeforeIndex );
        }
    }

    public void membershipChangesComplete()
    {
        mSelectorPanel.relayoutFromHereDown();
    }

    public FormAttributeAdapter createTabAttributeAdapter( FormInstanceComponentHandler pComponentHandler,
                                                           AttributeMetaData pTabAttributeMetaData,
                                                           Widget pWidget )
    {
        return new MyFormAdapter( pComponentHandler, pTabAttributeMetaData, pWidget );
    }

    private final class MyFormAdapter extends AbstractFormAttributeAdapter
    {
        private Widget mWidget;

        public MyFormAdapter( FormInstanceComponentHandler pComponentHandler, AttributeMetaData pMD,
                              Widget pWidget )
        {
            super( pComponentHandler, pMD, new NullFormComponent() );
            mWidget = pWidget;
        }

        protected Widget initWidget()
        {
            return null;
        }

        protected Object convertSendableToComponentValue( Serializable pValue )
        {
            return pValue;
        }

        protected String convertComponentValueToString( Object pValue )
        {
            return null;
        }

        protected Object convertStringToComponentValue( String pValue )
        {
            return null;
        }

        protected void setComponentCurrentValue( Object pNewComponentCurrentValue )
        {
            super.setComponentCurrentValue( pNewComponentCurrentValue );
            if ( pNewComponentCurrentValue != null )
            {
                int zIndex = mSelectorPanel.indexOfTabBodyWith( mWidget );
                if ( zIndex != -1 )
                {
                    mSelectorPanel.setTabText( zIndex, pNewComponentCurrentValue.toString() );
                }
            }
        }
    }
}