HoverLabel.java

package jetbrains.mps.editor.contextActionsTool.pluginSolution.plugin;

/*Generated by MPS */

import javax.swing.JLabel;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.Graphics;
import java.awt.Color;
import java.awt.Font;

public class HoverLabel extends JLabel {

  private boolean isHovered = false;
  private boolean strong = false;

  public HoverLabel(String text) {
    super(text);

    addMouseListener(new MouseAdapter() {
      @Override
      public void mouseEntered(MouseEvent event) {
        isHovered = true;
        repaint();
      }
      @Override
      public void mouseExited(MouseEvent event) {
        isHovered = false;
        strong = false;
        repaint();
      }

      @Override
      public void mousePressed(MouseEvent event) {
        strong = true;
        repaint();
      }

      @Override
      public void mouseReleased(MouseEvent event) {
        strong = false;
        repaint();
      }
    });

    addMouseMotionListener(new MouseMotionAdapter() {
      @Override
      public void mouseDragged(MouseEvent event) {
        isHovered = false;
        strong = false;
        repaint();
      }
    });
  }

  protected boolean isHighlighted() {
    return isHovered;
  }

  protected boolean isStrong() {
    return strong;
  }

  protected boolean isStrongHightlight() {
    return isHighlighted() && isStrong();
  }

  @Override
  public void paint(Graphics g_) {
    if (isHighlighted() || isStrongHightlight()) {
      Graphics g = g_.create();
      try {
        g.setColor(new Color(0, 0, 255, (isStrongHightlight() ? 60 : 20)));
        g.fillRect(0, 0, getWidth(), getHeight());
        g.setColor(new Color(0, 0, 255, (isStrongHightlight() ? 100 : 40)));
        g.drawRect(0, 0, getWidth() - 1, getHeight() - 1);
      } finally {
        g.dispose();
      }
    }

    super.paint(g_);
  }

  @Override
  public void setFont(Font font) {
    super.setFont(font);
  }
}