gistfile1.java

import java.awt.Color;

import javax.vecmath.Point2d;

import org.openscience.cdk.interfaces.IAtom;
import org.openscience.cdk.interfaces.IAtomContainer;
import org.openscience.cdk.interfaces.IBond;
import org.openscience.cdk.renderer.RendererModel;
import org.openscience.cdk.renderer.elements.ElementGroup;
import org.openscience.cdk.renderer.elements.IRenderingElement;
import org.openscience.cdk.renderer.elements.OvalElement;
import org.openscience.cdk.renderer.generators.BasicBondGenerator;

public class FancyHighlightGenerator extends BasicBondGenerator {
    
    private Color fancyColor = Color.BLUE;

    public IRenderingElement generate(IAtomContainer ac, RendererModel model) {
        ElementGroup group = new ElementGroup();
        IAtomContainer selection = model.getExternalSelectedPart();
        if (selection == null) return group;
        
        super.ringSet = super.getRingSet(selection);
        
        // crude, but works
        double originalWidth = model.getBondWidth();
        model.setBondWidth(originalWidth * 6);
        super.setOverrideColor(fancyColor);
        for (IBond bond : selection.bonds()) {
            group.add(super.generate(bond, model));
        }
        super.setOverrideColor(null);
        model.setBondWidth(originalWidth);
        
        // now do the atoms
        double originalRadius = model.getAtomRadius() / model.getScale();
        for (IAtom atom : selection.atoms()) {
            Point2d p = atom.getPoint2d();
            group.add(
                    new OvalElement(
                            p.x, p.y, originalRadius * 1.5, fancyColor));
        }
        
        return group;
    }

}