edu.uci.ics.jung.visualization.renderers.Checkmark Maven / Gradle / Ivy

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package edu.uci.ics.jung.visualization.renderers;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.geom.AffineTransform;
import java.awt.geom.GeneralPath;
import java.util.Collections;
import javax.swing.Icon;

/**
 * a simple Icon that draws a checkmark in the lower-right quadrant of its area. Used to draw a
 * checkmark on Picked Nodes.
 *
 * @author Tom Nelson
 */
public class Checkmark implements Icon {

  GeneralPath path = new GeneralPath();
  AffineTransform highlight = AffineTransform.getTranslateInstance(-1, -1);
  AffineTransform lowlight = AffineTransform.getTranslateInstance(1, 1);
  AffineTransform shadow = AffineTransform.getTranslateInstance(2, 2);
  Color color;

  public Checkmark() {
    this(Color.green);
  }

  public Checkmark(Color color) {
    this.color = color;
    path.moveTo(10, 17);
    path.lineTo(13, 20);
    path.lineTo(20, 13);
  }

  public void paintIcon(Component c, Graphics g, int x, int y) {
    Shape shape = AffineTransform.getTranslateInstance(x, y).createTransformedShape(path);
    Graphics2D g2d = (Graphics2D) g;
    g2d.addRenderingHints(
        Collections.singletonMap(
            RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON));
    Stroke stroke = g2d.getStroke();
    g2d.setStroke(new BasicStroke(4));
    g2d.setColor(Color.darkGray);
    g2d.draw(shadow.createTransformedShape(shape));
    g2d.setColor(Color.black);
    g2d.draw(lowlight.createTransformedShape(shape));
    g2d.setColor(Color.white);
    g2d.draw(highlight.createTransformedShape(shape));
    g2d.setColor(color);
    g2d.draw(shape);
    g2d.setStroke(stroke);
  }

  public int getIconWidth() {
    return 20;
  }

  public int getIconHeight() {
    return 20;
  }
}