My Blog

Lines.java

package com.zetcode;

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

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


public class Lines extends JPanel {

int coords[][];
int count;

public Lines() {

coords = new int [100][2];
count = 0;

addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent event) {
if (event.getButton() == event.BUTTON1) {

int x = event.getX();
int y = event.getY();

coords[count][0] = x;
coords[count][1] = y;
count++;
}

if (event.getButton() == event.BUTTON3) {
drawLines();
count = 0;
}
}
});
}

public void drawLines() {

Graphics g = this.getGraphics();

Graphics2D g2d = (Graphics2D) g;

int w = getWidth();
int h = getHeight();

RenderingHints rh =
new RenderingHints(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);

rh.put(RenderingHints.KEY_RENDERING,
RenderingHints.VALUE_RENDER_QUALITY);

g2d.setRenderingHints(rh);

g2d.clearRect(0, 0, w, h);


for ( int i = 0; i < count-1; i++ ) {
for (int j = 0; j < count-1; j++)
g2d.drawLine(coords[i][0], coords[i][1],
coords[j][0], coords[j][1]);
}
}

public static void main(String[] args) {

Lines lines = new Lines();
JFrame frame = new JFrame("Lines");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(lines);
frame.setSize(300, 200);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}