package org.simantics.district.network.ui.nodes;

import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.util.LinkedList;
import java.util.List;
import java.util.ListIterator;

import org.simantics.scenegraph.g2d.G2DNode;
import org.simantics.utils.datastructures.Pair;

public class DeferredRenderingNode extends G2DNode {

	private static final long serialVersionUID = 1L;
	
	List<Pair<AffineTransform, DeferredNode>> queue = new LinkedList<>();
	
	@Override
	public void render(Graphics2D g2d) {
		AffineTransform currentTransform = g2d.getTransform();
		
		ListIterator<Pair<AffineTransform, DeferredNode>> listIterator = queue.listIterator();
		while (listIterator.hasNext()) {
			Pair<AffineTransform, DeferredNode> node = listIterator.next();
			listIterator.remove();
			
			g2d.setTransform(node.first);
			node.second.renderDeferred(g2d);
		}
		
		g2d.setTransform(currentTransform);
	}

	@Override
	public Rectangle2D getBoundsInLocal() {
		return null;
	}

	public void deferNode(AffineTransform transform, DeferredNode node) {
		queue.add(new Pair<>(transform, node));
	}
}