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sunil burman
core java
2 Answer(s)      8 years ago
Posted in : Applet

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April 29, 2009 at 12:55 PM


Hi Friend,

Create an applet 'SimpleDrawLine.java':

import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class SimpleDrawApplet extends Applet implements MouseListener, MouseMotionListener {
private final static int BLACK = 0;
private int currentColor = BLACK;
private int prevX, prevY;
private boolean dragging;

private Graphics graphics;
public void init() {
addMouseListener(this);
addMouseMotionListener(this);
}
private void drawGraphics() {
graphics = getGraphics();
switch (currentColor) {
case BLACK: graphics.setColor(Color.black);
break;
}
}
public void mousePressed(MouseEvent evt) {
int x = evt.getX();
int y = evt.getY();
int width = getSize().width;
int height = getSize().height;
if (dragging == true)
return;
if (x > width - 55) {
if (y > height - 55)
repaint();
}
else if (x > 3 && x < width - 56 && y > 3 && y < height - 3) {
prevX = x;
prevY = y;
dragging = true;
drawGraphics(); } }
public void mouseReleased(MouseEvent evt) {
if (dragging == false) return;
dragging = false;
graphics.dispose();
graphics = null;
}
public void mouseDragged(MouseEvent evt) {
if (dragging == false) return;
int x = evt.getX();
int y = evt.getY();
if (x < 3)
x = 3;
if (x > getSize().width - 58)
x = getSize().width - 58;
if (y < 3)
y = 3;
if (y > getSize().height - 4)
y = getSize().height - 4;
graphics.drawLine(prevX, prevY, x, y);
prevX = x;
prevY = y; }
public void mouseEntered(MouseEvent evt) { }
public void mouseExited(MouseEvent evt) { }
public void mouseClicked(MouseEvent evt) { }
public void mouseMoved(MouseEvent evt) { }
}
Then call this applet with html file 'applet.html'.

<h2><u>Draw Line using mouse</u></h2>
<applet code="SimpleDrawApplet.class" width="400" height="200">
</applet>
Thanks


April 29, 2009 at 12:57 PM



The applet name was SimpleDrawApplet.java

Thanks









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