package org.cristalise.gui.lifecycle.desc;

import java.awt.Color;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.Paint;

import org.cristalise.gui.graph.view.VertexRenderer;
import org.cristalise.kernel.graph.model.GraphPoint;
import org.cristalise.kernel.graph.model.Vertex;
import org.cristalise.kernel.lifecycle.ActivitySlotDef;
import org.cristalise.kernel.utils.Language;


public class ActivitySlotDefRenderer implements VertexRenderer
{
    private Paint mInactivePaint = new Color(255, 255, 255);
    private Paint mErrorPaint    = new Color( 255, 50, 0 );
	private Paint mCompositePaint= new Color(200, 200, 255);
    private Paint mTextPaint     = Color.black;


    @Override
	public void draw( Graphics2D g2d, Vertex vertex)
    {
        ActivitySlotDef activitySlotDef  = ( ActivitySlotDef )vertex;
        boolean         hasError         = activitySlotDef.verify();
		boolean         isComposite = false;
        isComposite      = activitySlotDef.getIsComposite();
        GraphPoint      centrePoint      = activitySlotDef.getCentrePoint();
        int             vertexHeight     = activitySlotDef.getHeight();
        int             vertexWidth      = activitySlotDef.getWidth();

        String[]        linesOfText      = new String[2+(hasError?0:1)];
        FontMetrics     metrics          = g2d.getFontMetrics();
        int             lineWidth        = 0;
        int             lineHeight       = metrics.getHeight();
        int             linesHeight      = lineHeight * linesOfText.length;
        int             linesStartY      = centrePoint.y - linesHeight / 2 + lineHeight * 2 / 3;
        int             x                = 0;
        int             y                = 0;
        int             i                = 0;

        linesOfText[0]="("+activitySlotDef.getActivityDef()+")";
        linesOfText[1]=(String)activitySlotDef.getProperties().get("Name");

        if (!hasError)linesOfText[2]=Language.translate(activitySlotDef.getErrors());

        g2d.setPaint( !hasError ? mErrorPaint : isComposite ? mCompositePaint : mInactivePaint );
        g2d.fill3DRect
        (
            centrePoint.x - vertexWidth / 2,
            centrePoint.y - vertexHeight / 2,
            vertexWidth,
            vertexHeight,
            true
        );

        g2d.setPaint( mTextPaint );

        // Draw the lines of text
        for ( i = 0; i < linesOfText.length; i++ )
        {
            if (linesOfText[i] == null) linesOfText[i] = "";
            lineWidth = metrics.stringWidth( linesOfText[ i ] );
            x = centrePoint.x - lineWidth / 2;
            y = linesStartY + i * lineHeight;
            g2d.drawString( linesOfText[ i ], x, y );
        }
    }
}