package cz.frantovo.obrazkovyApplet;

import java.awt.Color;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import java.awt.event.MouseMotionListener;

import java.awt.image.BufferedImage;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.net.URL;

import java.net.URLConnection;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.imageio.ImageIO;

import javax.swing.UIManager;

import javax.swing.UIManager.LookAndFeelInfo;

public class ObrazkovyApplet extends javax.swing.JApplet implements MouseMotionListener, MouseListener {

	private static final Logger log = Logger.getLogger(ObrazkovyApplet.class.getSimpleName());

	private static final String CILOVE_URL = "http://vm.frantovo.cz/temp/applet/";

	private int stareX;

	private int stareY;

	private boolean kresli;

	private Graphics g;

	private Graphics2D vystupniGrafika;

	private BufferedImage obrazek;

	private void odesliData() {

		try {

			URL url = new URL(CILOVE_URL);

			URLConnection spojeni = url.openConnection();

			spojeni.setDoOutput(true);

			spojeni.connect();

			OutputStream os = spojeni.getOutputStream();

			ImageIO.write(obrazek, "png", os);

			os.flush();

			os.close();

			BufferedReader r = new BufferedReader(new InputStreamReader(spojeni.getInputStream()));

			vypisStav(r.readLine());

			r.close();

			smazGrafiku();

		} catch (Exception e) {

			vypisStav("odeslání selhalo: " + e.getMessage());

			log.log(Level.SEVERE, "Nepodařilo se odeslat data", e);

		}

	}

	private void smazGrafiku() {

		getVystupniGrafika().clearRect(0, 0, platno.getWidth(), platno.getHeight());

		g.clearRect(0, 0, platno.getWidth(), platno.getHeight());

	}

	public void mouseDragged(MouseEvent e) {

		int x = e.getX();

		int y = e.getY();

		if (kresli) {

			vypisStav("kreslím: " + stareX + "x" + stareY + "→" + x + "x" + y);

			g = platno.getGraphics();

			g.setColor(Color.BLUE);

			g.drawLine(stareX, stareY, x, y);

			platno.pa

			getVystupniGrafika().drawLine(stareX, stareY, x, y);

		}

		stareX = x;

		stareY = y;

	}

	public void mousePressed(MouseEvent e) {

		stareX = e.getX();

		stareY = e.getY();

		kresli = true;

	}

	public void mouseReleased(MouseEvent e) {

		kresli = false;

	}

	public void mouseMoved(MouseEvent e) {

	}

	public void mouseClicked(MouseEvent e) {

	}

	public void mouseEntered(MouseEvent e) {

	}

	public void mouseExited(MouseEvent e) {

		kresli = false;

	}

	private Graphics2D getVystupniGrafika() {

		if (obrazek == null) {

			obrazek = new BufferedImage(platno.getWidth(), platno.getHeight(), BufferedImage.TYPE_INT_RGB);

		}

		if (vystupniGrafika == null) {

			vystupniGrafika = obrazek.createGraphics();

			vystupniGrafika.setBackground(Color.WHITE);

			vystupniGrafika.setColor(Color.BLUE);

			vystupniGrafika.clearRect(0, 0, platno.getWidth(), platno.getHeight());

		}

		return vystupniGrafika;

	}

	@Override

	public void init() {

		/** Lepší vzhled – LaF */

		try {

			for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {

				if ("Nimbus".equals(info.getName())) {

					UIManager.setLookAndFeel(info.getClassName());

					break;

				}

			}

		} catch (Exception e) {

		}

		/** Spuštění appletu */

		try {

			java.awt.EventQueue.invokeAndWait(new Runnable() {

				public void run() {

					initComponents();

				}

			});

		} catch (Exception e) {

			log.log(Level.SEVERE, "Chyba appletu:", e);

		}

		/** Nastavení plátna */

		platno.addMouseMotionListener(ObrazkovyApplet.this);

		platno.addMouseListener(ObrazkovyApplet.this);

		log.log(Level.INFO, "plátno nastaveno");

	}

	@SuppressWarnings("unchecked")

    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents

    private void initComponents() {

        odeslat = new javax.swing.JButton();

        stavovyRadek = new javax.swing.JLabel();

        platno = new javax.swing.JPanel();

        odeslat.setText("Odeslat na server");

        odeslat.addActionListener(new java.awt.event.ActionListener() {

            public void actionPerformed(java.awt.event.ActionEvent evt) {

                odeslatActionPerformed(evt);

            }

        });

        stavovyRadek.setText(" ");

        platno.setDoubleBuffered(true);

        javax.swing.GroupLayout platnoLayout = new javax.swing.GroupLayout(platno);

        platno.setLayout(platnoLayout);

        platnoLayout.setHorizontalGroup(

            platnoLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

            .addGap(0, 388, Short.MAX_VALUE)

        );

        platnoLayout.setVerticalGroup(

            platnoLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

            .addGap(0, 255, Short.MAX_VALUE)

        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());

        getContentPane().setLayout(layout);

        layout.setHorizontalGroup(

            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

            .addGroup(layout.createSequentialGroup()

                .addContainerGap()

                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

                    .addComponent(platno, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)

                    .addGroup(layout.createSequentialGroup()

                        .addComponent(stavovyRadek, javax.swing.GroupLayout.DEFAULT_SIZE, 243, Short.MAX_VALUE)

                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

                        .addComponent(odeslat)))

                .addContainerGap())

        );

        layout.setVerticalGroup(

            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()

                .addContainerGap()

                .addComponent(platno, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)

                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)

                    .addComponent(odeslat)

                    .addComponent(stavovyRadek))

                .addContainerGap())

        );

    }// </editor-fold>//GEN-END:initComponents

	private void odeslatActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_odeslatActionPerformed

		odesliData();

	}//GEN-LAST:event_odeslatActionPerformed

	private void vypisStav(String text) {

		stavovyRadek.setText(text);

	}

    // Variables declaration - do not modify//GEN-BEGIN:variables

    private javax.swing.JButton odeslat;

    private javax.swing.JPanel platno;

    private javax.swing.JLabel stavovyRadek;

    // End of variables declaration//GEN-END:variables

}