// This Source Code is in the Public Domain per: http://litesoft.org/License.txt
package org.litesoft.GWT.client.widgets;

import org.litesoft.commonfoundation.typeutils.*;

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

public class RenderedDeferredCommandHelper
{
    private Command mRenderedDeferredCommand = null;
    private Widget mWidget;
    private boolean mWidthOK = false;
    private boolean mHeightOK = false;

    public RenderedDeferredCommandHelper( Widget pWidget )
    {
        mWidget = pWidget;
    }

    public void chkWidth( String pWidth )
    {
        if ( !mWidthOK )
        {
            mWidthOK = areSame( pWidth, mWidget.getOffsetWidth() );
            checkRun();
        }
    }

    public void chkHeight( String pHeight )
    {
        if ( !mHeightOK )
        {
            mHeightOK = areSame( pHeight, mWidget.getOffsetHeight() );
            checkRun();
        }
    }

    public void setRenderedDeferredCommand( Command pRenderedDeferredCommand )
    {
        mRenderedDeferredCommand = pRenderedDeferredCommand;
        checkRun();
    }

    private void checkRun()
    {
        if ( mWidthOK && mHeightOK && (mRenderedDeferredCommand != null) )
        {
            Scheduler.get().scheduleDeferred( mRenderedDeferredCommand );
            mRenderedDeferredCommand = null;
        }
    }

    private boolean areSame( String pSize, int pOffsetSize )
    {
        if ( pOffsetSize > 0 )
        {
            if ( null != (pSize = Strings.noEmpty( pSize )) )
            {
                return pSize.equals( Integer.toString( pOffsetSize ) );
            }
        }
        return false;
    }
}