/**
	Company:		Shout3D LLC
	Project:		Shout3D Core
	Class:			LabelEffect
	Date:			June 7, 2000
	Description:	An example of a PostRenderEffect that displays a label
	(C) Copyright Shout3D LLC. - 1997-2001 - All rights reserved
 */

package custom_nodes;

import shout3d.core.*;
import shout3d.*;
import shout3d.core.awt.*;
import java.awt.*;
import java.awt.image.*;

/**
 * LabelEffect
 *
 * @author Jim Stewartson
 */

public class LabelEffect extends PostRenderEffect implements FieldObserver{

	final public FloatArrayField label_bg_color		= new FloatArrayField(	this, "label_bg_color",				Field.COLOR,	new float[]{0,0,0});
	final public FloatArrayField label_border_color	= new FloatArrayField(	this, "label_border_color",		    Field.COLOR,	new float[]{0,1,0});
	final public FloatArrayField label_text_color	= new FloatArrayField(	this, "label_text_color",		    Field.COLOR,	new float[]{1,1,0});
	final public StringField     label_text_font	= new StringField(		this, "label_text_font",			Field.ANY,	"Arial");
	final public StringField     label_text			= new StringField(		this, "label_text",					Field.ANY,	"");
	final public IntField		 label_text_size	= new IntField(			this, "label_text_size",		    Field.NON_NEGATIVE_INT,	12);
	final public StringField	 label_text_style	= new StringField(		this, "label_text_style",			Field.ANY,	"bold");
	final public IntField		 xPosition			= new IntField(			this, "xPosition",					Field.NON_NEGATIVE_INT,	0);
	final public IntField		 yPosition			= new IntField(			this, "yPosition",					Field.NON_NEGATIVE_INT,	0);

	static final String PLAIN			= "plain";
	static final String BOLD			= "bold";
	static final String ITALIC			= "italic";
	static final String BOLDITALIC		= "bolditalic";

	static final int BG_COLOR		= 0;
	static final int BORDER_COLOR	= 1;
	static final int TEXT_COLOR		= 2;
	static final int TEXT			= 3;
	static final int FONT			= 4;
	static final int SIZE			= 5;
	static final int STYLE			= 6;
	static final int X				= 7;
	static final int Y				= 8;

	/**
	 * Constructs a default LabelEffect node.
	 */
	public LabelEffect() {
		label_bg_color.addFieldObserver(this, new Integer(BG_COLOR));
		label_border_color.addFieldObserver(this, new Integer(BORDER_COLOR));
		label_text_color.addFieldObserver(this, new Integer(TEXT_COLOR));
		label_text.addFieldObserver(this, new Integer(TEXT));
		label_text_font.addFieldObserver(this, new Integer(FONT));
		label_text_size.addFieldObserver(this, new Integer(SIZE));
		label_text_style.addFieldObserver(this, new Integer(STYLE));
		xPosition.addFieldObserver(this, new Integer(X));
		yPosition.addFieldObserver(this, new Integer(Y));
	}

	public void onFieldChange(Field f, Object userData) {
		int whichField = ((Integer)userData).intValue();
		switch(whichField) {
			case BG_COLOR:
				j_label_bg_color = new java.awt.Color(label_bg_color.getValue()[0], label_bg_color.getValue()[1], label_bg_color.getValue()[2]);
				break;
			case BORDER_COLOR:
				j_label_border_color = new java.awt.Color(label_border_color.getValue()[0], label_border_color.getValue()[1], label_border_color.getValue()[2]);
				break;
			case TEXT_COLOR:
				j_label_text_color = new java.awt.Color(label_text_color.getValue()[0], label_text_color.getValue()[1], label_text_color.getValue()[2]);
				break;
			case SIZE:
			case FONT:
			case STYLE:
				String style = label_text_style.getValue();
				int javaFontStyle;
				if (style.equalsIgnoreCase(BOLD)) {
					javaFontStyle = Font.BOLD;
				}
				else if (style.equalsIgnoreCase(ITALIC)) {
					javaFontStyle = Font.ITALIC;
				}
				else if (style.equalsIgnoreCase(BOLDITALIC)) {
					javaFontStyle = Font.BOLD+Font.ITALIC;
				}
				else {
					javaFontStyle = Font.PLAIN;
				}
				font = new Font(label_text_font.getValue(), javaFontStyle, label_text_size.getValue());
				break;
		}
	}

	java.awt.Color j_label_bg_color = new java.awt.Color(0f, 0f, 0f);
	java.awt.Color j_label_border_color = new java.awt.Color(0f, 1f, 0f);
	java.awt.Color j_label_text_color = new java.awt.Color(1f, 1f, 0f);

	Font font = new Font("Arial", Font.BOLD, 12);
	public void filter(Graphics g, int surface_pixel_bits[], float z_buffer[], int deviceWidth, int deviceHeight)
	{
		drawLabel(g);
    }

	public boolean drawLabel(Graphics g)
	{
		g.setFont(font);
		String string = label_text.getValue();
		if (string != null){
			int x = xPosition.getValue();
			int y = yPosition.getValue();
			int width = g.getFontMetrics().stringWidth(string);
			int height = g.getFontMetrics().getHeight();
			int descent = g.getFontMetrics().getMaxDescent()/2;

			g.setColor(j_label_bg_color);
			g.fillRect(x, y, width+4, height+4);
			g.setColor(j_label_border_color);
			g.drawRect(x, y, width+4, height+4);
			g.setColor(j_label_text_color);
			g.drawString(string, x+2, y+height-descent);
			return true;
		}
		return false;
	}
}