package org.jzy3d.plot3d.text.renderers.jogl;

import java.awt.Color;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics2D;
import java.awt.font.FontRenderContext;
import java.awt.font.GlyphVector;
import java.awt.geom.Rectangle2D;

public class ShadowedTextStyle implements ITextStyle {
	private float gradientSize;
	private int dropShadowDepth;
	private Color color1;
	private Color color2;

	public ShadowedTextStyle(float gradientSize, int dropShadowDepth, Color color1, Color color2) {
		this.gradientSize = gradientSize;
		this.dropShadowDepth = dropShadowDepth;
		this.color1 = color1;
		this.color2 = color2;
	}

	@Override
    public boolean intensityOnly() {
		return false;
	}

	@Override
    public Rectangle2D getBounds(CharSequence str, Font font,
			FontRenderContext frc) {
		return getBounds(str.toString(), font, frc);
	}

	@Override
    public Rectangle2D getBounds(String str, Font font, FontRenderContext frc) {
		return getBounds(font.createGlyphVector(frc, str), frc);
	}

	@Override
    public Rectangle2D getBounds(GlyphVector gv, FontRenderContext frc) {
		Rectangle2D stringBounds = gv.getPixelBounds(frc, 0, 0);
		return new Rectangle2D.Double(stringBounds.getX(), stringBounds.getY(),
				stringBounds.getWidth() + dropShadowDepth,
				stringBounds.getHeight() + dropShadowDepth);
	}

	@Override
    public void drawGlyphVector(Graphics2D graphics, GlyphVector str, int x,
			int y) {
		//shadow
		graphics.setColor(DROP_SHADOW_COLOR);
		graphics.drawGlyphVector(str, x + dropShadowDepth, y + dropShadowDepth);
		
		// normal
		graphics.setColor(Color.WHITE);
		graphics.setPaint(new GradientPaint(x, y, color1, x, y + gradientSize
				/ 2, color2, true));
		graphics.drawGlyphVector(str, x, y);
	}

	@Override
    public void draw(Graphics2D graphics, String str, int x, int y) {
		//shadow
		graphics.setColor(DROP_SHADOW_COLOR);
		graphics.drawString(str, x + dropShadowDepth, y + dropShadowDepth);
		
		// normal
		graphics.setColor(Color.WHITE);
		graphics.setPaint(new GradientPaint(x, y, color1, x, y + gradientSize
				/ 2, color2, true));
		graphics.drawString(str, x, y);
	}

	protected static final Color DROP_SHADOW_COLOR = new Color(0, 0, 0, 0.5f);
}