/*
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 * and open the template in the editor. Made by Grzechu Rubinoff
 */
package lab4;
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;

public class AwtControlDemo implements KeyListener {

    private Frame mainFrame;
    private Panel controlPanel;
    public ArrayList<Coord> coords = new ArrayList<Coord>();
    public double xShift, yShift;
    public int bufferShiftX = 500;
    public int bufferShiftY = 500;



    public AwtControlDemo(ArrayList<Coord> coordList){
        coords = coordList;
        xShift = coords.get(0).getX();
        yShift = coords.get(0).getY();

        prepareGUI();
    }

    private void prepareGUI(){
        mainFrame = new Frame("Java AWT Examples");
        mainFrame.setSize(1000,1000);
        mainFrame.setLayout(new GridLayout(1, 1));
        mainFrame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent windowEvent){
                System.exit(0);
            }
        });
        controlPanel = new Panel();
        controlPanel.setLayout(new FlowLayout());

        mainFrame.add(controlPanel);
        mainFrame.setVisible(true);
        mainFrame.addKeyListener(this);
    }

    public void showCanvasDemo(){
        controlPanel.add(new MyCanvas());
        mainFrame.setVisible(true);
    }

    @Override
    public void keyTyped(KeyEvent e) {
        char keyCode = e.getKeyChar();
        if(keyCode == 'w'){
            bufferShiftY -= 50;
        } else if(keyCode == 's'){
            bufferShiftY += 50;
        } else if(keyCode == 'a'){
            bufferShiftX -=50;
        } else if(keyCode == 'd'){
            bufferShiftX +=50;
        }
        controlPanel.removeAll();
        controlPanel.add(new MyCanvas());
    }

    @Override
    public void keyPressed(KeyEvent e) {
    }

    @Override
    public void keyReleased(KeyEvent e) {
    }

    class MyCanvas extends Canvas {

        public MyCanvas () {
            setBackground (new Color(230, 230, 220, 255));
            setSize(1000, 1000);
        }

        public void paint (Graphics g) {
            Graphics2D g2;
            g2 = (Graphics2D) g;
            drawMap(g2);
        }

        public void drawMap(Graphics2D g2) {
            double lastX = xShift;
            double lastY = yShift;
            for (Coord coord: coords) {
                int x1 =(int) ((lastX - xShift))*2;
                int y1 =(int) ((lastY - yShift))*2;
                int x2 =(int) ((coord.getX() - xShift))*2;
                int y2 =(int) ((coord.getY()- yShift))*2;
                g2.drawLine(x1+bufferShiftX, y1+bufferShiftY, x2+bufferShiftX, y2+bufferShiftY);
                lastX = coord.getX();
                lastY = coord.getY();
            }
        }
    }
}