/*
 * Created on Jul 18, 2004
 */
package treeDraw;

import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.util.Random;

import javax.swing.JFrame;
import javax.swing.JPanel;

/** A simple frame and panel for displaying an IDrawableNode.
 * Use the setTree method to place your tree inside the frame.
 * See the main method for an example of how to use.
 * 
 * @author dickey
 */
public class TreeDrawFrame extends JFrame {
	
	public static final int PANEL_WIDTH = 600;
	public static final int PANEL_HEIGHT = 500;
	
	private TreeDrawPanel treePanel;
	
	public TreeDrawFrame() {
		super("Tree Draw Frame");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Container contents = getContentPane();
		this.treePanel = new TreeDrawPanel();
		contents.add(treePanel);
		pack();
		show();
	}
	
	public void setTree(IDrawableNode tree) {
		this.treePanel.setTree(tree);
	}
	
	/** A panel which contains a tree which is drawn.
	 */
	private class TreeDrawPanel extends JPanel {
		
		public TreeDrawPanel() {
			setPreferredSize(new Dimension(PANEL_WIDTH, PANEL_HEIGHT));
			setBackground(Color.WHITE);
		}
		
		private IDrawableNode theTree;
		
		public void setTree(IDrawableNode tree) {
			this.theTree = tree;
			this.repaint();
		}
		
		public void paintComponent(Graphics g) {
			super.paintComponent(g); //don't forget this! Or background is not cleared.
			if (this.theTree != null) {
				this.theTree.paint(this, (Graphics2D) g, 0, 0);
			}
		}
	}
	
	/** An example of how to create and use the frame.
	 * This won't compile until you replace "GraphingNode" and/or
	 * "DrawableTree" with your own
	 * class implementing IDrawableNode.
	 * @param args not used
	 */
	public static void main(String[] args) {
		final TreeDrawFrame tframe = new TreeDrawFrame();
		tframe.setTitle("Tree Demo");
		GraphingNode testNode = GraphingNode.randomNode(30);
		IDrawableNode testTree = new DrawableTree(testNode);
		tframe.setTree(testTree);  //the tree should now be displayed		
		
		// Following illustrates a framework for animation.
		// Not needed until the second week!
		class AnimationThread extends Thread {
			public void run() {
				final int delay = 1000; //milliseconds
				final int maxNodes = 200;
				final int maxTrees = 500;
				Random rand = new Random();
				for (int sec = 0; sec < maxTrees; sec++) {
					try {
						Thread.sleep(delay);
					} catch (InterruptedException e) {
						break;
					}
					int howManyNodes = rand.nextInt(maxNodes);
					GraphingNode testNode = GraphingNode.randomNode(howManyNodes);
					IDrawableNode testTree = new DrawableTree(testNode);
					tframe.setTree(testTree);  //show another tree
				}
				
			} //end run
		};
		
		AnimationThread animator = new AnimationThread();
		animator.start();  //starts the animation
	}


}