package projekt2;

import java.awt.*;

import javax.swing.JPanel;

import java.awt.event.*;

import javax.swing.*;

import java.awt.Graphics;


public class MovingBar extends JFrame implements KeyListener{

	private int recx;
	private int recy;
	private int recw;
	private int rech;
	private int frameWidth = 400;
	private int frameHeight = 300;

	private boolean movingL;
	private boolean movingR;

	JPanel mp = new JPanel();

	public MovingBar()
	{
		this.setTitle("SpaceSpace");
		this.setSize(frameWidth,frameHeight);
		this.recw = 100;
		this.rech = 10;
		this.recx = getWidth() / 2 - this.rech / 2;
		this.recy = getHeight() - this.rech - 10;
		this.getContentPane().setLayout(new BorderLayout());
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		mp.addKeyListener(this);
		this.add(mp);
		mp.setFocusable(true);
		mp.setBackground(Color.BLACK);
		this.movingL = false;
		this.movingR = false;
	}

	@Override
	public void paint(Graphics g)
	{

		super.paint(g);
		g.setColor(Color.WHITE);
		g.fillRect(this.recx, this.recy, this.recw, this.rech);
		repaint();
	}

	public void moveLeft()
	{
		if (this.recx >= 0)
		this.recx--;
	}

	public void moveRight()
	{
		if (this.recx < this.frameWidth - this.recw)
		this.recx++;
	}

	@Override
	public void keyPressed (KeyEvent e)
	{
		if (e.getKeyCode() == KeyEvent.VK_LEFT)
		{
			this.movingL = true;
			this.movingR = false;
		}

		if (e.getKeyCode() == KeyEvent.VK_RIGHT)
		{
			this.movingR = true;
			this.movingL = false;
		}
	}

	@Override
	public void keyReleased (KeyEvent e)
	{
		if (e.getKeyCode() == KeyEvent.VK_LEFT)

			this.movingL = false;

		if (e.getKeyCode() == KeyEvent.VK_RIGHT)

			this.movingR = false;
	}

	@Override
	public void keyTyped(KeyEvent e)
	{

	}

	public void actionHandler()
	{
		if (this.movingL == true )
			moveLeft();

		if (this.movingR == true)
			moveRight();
	}

}

//Main

package projekt2;

import java.awt.Color;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		MovingBar mb = new MovingBar();
		mb.setResizable(false);
		mb.setVisible(true);
		mb.actionHandler();
	}

}