rogue-savage-rats/src/mightypork/rogue/display/constraints/ElementHolder.java

package mightypork.rogue.display.constraints;


import java.util.LinkedList;

import mightypork.rogue.AppAccess;
import mightypork.rogue.bus.ChildClient;
import mightypork.utils.math.coord.Rect;


public class ElementHolder extends ChildClient implements RenderContext, Renderable {
	
	private LinkedList<Renderable> elements = new LinkedList<Renderable>();
	private RenderContext context;
	
	
	public ElementHolder(AppAccess app) {
		super(app);
	}
	
	
	public ElementHolder(AppAccess app, RenderContext context) {
		super(app);
		this.context = context;
	}
	
	
	@Override
	public void setContext(RenderContext context)
	{
		this.context = context;
	}
	
	
	/**
	 * Add element to the holder.
	 * 
	 * @param elem
	 */
	public void add(Renderable elem)
	{
		if (elem == null) return;
		elem.setContext(this);
		elements.add(elem);
		addChildClient(elem);
	}
	
	
	/**
	 * Add element to the holder.
	 * 
	 * @param elem
	 * @param constraint
	 */
	public void add(Renderable elem, RectConstraint constraint)
	{
		if (elem == null) return;
		
		constraint.setContext(this);
		elem.setContext(constraint);
		
		elements.add(elem);
		addChildClient(elem);
	}
	
	
	/**
	 * Remove element from the holder
	 * 
	 * @param elem
	 */
	public void remove(Renderable elem)
	{
		if (elem == null) return;
		elements.remove(elem);
		removeChildClient(elem);
	}
	
	
	@Override
	public void render()
	{
		for (Renderable element : elements) {
			element.render();
		}
	}
	
	
	@Override
	public Rect getRect()
	{
		return context.getRect();
	}
	
}