magia 2D

package wikipedia;

import wikipedia.presentation.*;
import wikipedia.domain.*;
import wikipedia.persistence.*;
import java.io.*;
import g13.*;
import java.awt.Image;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import com.mxgraph.model.mxCell;
import com.mxgraph.swing.mxGraphComponent;
import com.mxgraph.util.mxCellRenderer;
import com.mxgraph.view.mxGraph;
import javax.swing.SwingUtilities;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.BorderFactory;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.*;


class MyPanel extends JPanel {

    final private static int PANEL_W = 1080;
    final private static int PANEL_H = 720;
    final private static double ZOOM_FACTOR = 0.75;

    private BufferedImage orig_img;
    private int scroll_x;
    private int scroll_y;
    private int scaled_w;
    private int scaled_h;
    private int img_w;
    private int img_h;
    private int img_x;
    private int img_y;
    private int mouse_x;
    private int mouse_y;
    private mxGraph mxg;
    private mxGraphComponent mxgc;

    public MyPanel(OGraph g) {

        mxg = g.toMxGraph();
        mxgc = new mxGraphComponent(mxg);

        orig_img = mxCellRenderer.createBufferedImage(mxg, null, 1, Color.WHITE, true, null);
        final int orig_w = orig_img.getWidth();
        final int orig_h = orig_img.getHeight();

        img_w = orig_w;
        img_h = orig_h;
        img_x = 0;
        img_y = 0;
        scaled_w = img_w;
        scaled_h = img_h;

        addMouseListener(new MouseAdapter() {
            public void mousePressed(MouseEvent e) {
                graphShit(e.getX(),e.getY());
                setScrollOrigin(e.getX(),e.getY());
            }
        });

        addMouseMotionListener(new MouseAdapter() {
            public void mouseDragged(MouseEvent e) {
                moveImage(e.getX(),e.getY());
                setScrollOrigin(e.getX(),e.getY());
            }
            public void mouseMoved(MouseEvent e) {
                mouse_x = e.getX();
                mouse_y = e.getY();
            }
        });

        addMouseWheelListener(new MouseAdapter() {
            public void mouseWheelMoved(MouseWheelEvent e) {
                double zoom = ZOOM_FACTOR;
                if (e.getWheelRotation() == -1) zoom = 1/zoom;

                double new_w = scaled_w * zoom;
                double new_h = scaled_h * zoom;

                if (new_w < 300 || new_h < 300) return;
                if (new_w > img_w*3 || new_h > img_h*3) return;

                scaled_w = (int)new_w;
                scaled_h = (int)new_h;

                int zoom_x = mouse_x;
                int zoom_y = mouse_y;
                if (zoom_x > (img_x + img_w)) zoom_x = (img_x + img_w);
                else if (zoom_x < img_x) zoom_x = img_x;

                img_x = (int)((mouse_x - img_x) + img_w*zoom);
                img_y = (int)((mouse_y - img_y) + img_h*zoom);

                repaint();
            }

        });
    }

    private void graphShit(int x, int y) {
        // Transform coordinates depending on the window's size
        int trans_x = (int)((x - img_x) * (img_w/(double)scaled_w));
        int trans_y = (int)((y - img_y) * (img_h/(double)scaled_h));

        Object obj = mxgc.getCellAt(trans_x, trans_y);
        //System.out.println("x: " + x + "  y: " + y);
        if (obj != null) {
            mxCell cell = (mxCell)obj;
            System.out.println(cell.getId());
        }
    }

    private void setScrollOrigin(int x, int y) {
        scroll_x = x;
        scroll_y = y;
    }

    private void moveImage(int x, int y) {
        img_x = img_x + (x - scroll_x);
        img_y = img_y + (y - scroll_y);
        repaint();
    }


    public Dimension getPreferredSize() {
        return new Dimension(PANEL_W, PANEL_H);
    }

    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        g.drawImage(orig_img, img_x, img_y, scaled_w, scaled_h, null);
    }
}

/**
 * Main Class
 * @author G13.2
 */
public class Main
{
    private static void createAndShowGUI(OGraph g) {
        System.out.println("Created GUI on EDT? "+
        SwingUtilities.isEventDispatchThread());
        JFrame f = new JFrame("Swing Paint Demo");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(new MyPanel(g));
        f.pack();
        f.setResizable(false);
        f.setVisible(true);
    }

    /**
    * The main method
    * @param args Arguments of main
    */
    public static void main(String[] args) {

        WP wikipedia = new WP();
        wikipedia.setGraph(GraphIO.loadWP(new File("golden/ENTRADAcodigo.txt")));
        final OGraph g = wikipedia.getGraph();

        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI(g);
            }
        });

    }
}