BufferImage Help
Hi can someone please help me fix my program? I've been working on it for the longest time and I dont know why the BufferedImage does not work. I'm quite sure I implemented it right. Can someone, anyone please help me out?
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.lang.StringBuffer;
import java.awt.Graphics;
import java.awt.Color;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.*;
publicclass JPanelsextends JFrameimplements MouseListener, MouseMotionListener, KeyListener
{
private Point oldPoint, currentPoint;
private String s;
private FontMetrics fm;
private JButton circBtn, rectBtn, lineBtn, eraseBtn, clearBtn, sendBtn;
JPanel drawingArea =new JPanel();
JPanel jp =new JPanel();
TextField message =new TextField("Draw away! Click anywhere on canvas to type");
int option;
int endx, endy;
int startX, startY;// The location of the mouse when the dragging started.
int mousex, mousey;// The location of the mouse during dragging.
int height, width;
BufferedImage img;
publicvoid init(){
//initialize the "old" point
oldPoint =new Point(0,0);
this.setSize(new Dimension(600, 500));
}
publicstaticvoid main(String[] args){
new JPanels();
}
public JPanels(){
super("Welcome to JPanels!");
Container content = getContentPane();
content.setBackground(Color.lightGray);
circBtn =new JButton("Circle");
rectBtn =new JButton("Rectangle");
lineBtn =new JButton("Line");
eraseBtn =new JButton("Eraser");
clearBtn =new JButton("Clear");
sendBtn =new JButton("Send");
jp.setLayout(new GridLayout(0,6));
jp.add(circBtn,0);
jp.add(rectBtn,1);
jp.add(lineBtn,2);
jp.add(eraseBtn,3);
jp.add(clearBtn,4);
jp.add(sendBtn,5);
message.setBackground(Color.gray);
message.setEditable(false);
message.setFocusable(false);
drawingArea.setPreferredSize(new Dimension(500, 400));
drawingArea.setBorder (BorderFactory.createLineBorder (Color.blue, 2));
drawingArea.setBackground(Color.white);
drawingArea.setFocusable(true);
content.add(jp, BorderLayout.NORTH);
content.add(drawingArea, BorderLayout.CENTER);
content.add(message, BorderLayout.SOUTH);
pack();
this.setVisible(true);
this.setResizable(false);
drawingArea.addMouseListener(this);
drawingArea.addMouseMotionListener(this);
drawingArea.addKeyListener(this);
//ActionPerformed methods for the buttons on the side panel
circBtn.setFocusable(false);
circBtn.setToolTipText("Draw a Circle");
circBtn.addActionListener(new ActionListener(){
publicvoid actionPerformed(ActionEvent e)
{
circBtn_actionPerformed(e);
}
});
rectBtn.setFocusable(false);
rectBtn.setToolTipText("Draw a Rectangle");
rectBtn.addActionListener(new ActionListener(){
publicvoid actionPerformed(ActionEvent e)
{
rectBtn_actionPerformed(e);
}
});
lineBtn.setFocusable(false);
lineBtn.setToolTipText("Draw a Line");
lineBtn.addActionListener(new ActionListener(){
publicvoid actionPerformed(ActionEvent e)
{
lineBtn_actionPerformed(e);
}
});
eraseBtn.setFocusable(false);
eraseBtn.setToolTipText("Eraser");
eraseBtn.addActionListener(new ActionListener(){
publicvoid actionPerformed(ActionEvent e)
{
eraseBtn_actionPerformed(e);
}
});
clearBtn.setFocusable(false);
clearBtn.setToolTipText("Clear Canvas");
clearBtn.addActionListener(new ActionListener(){
publicvoid actionPerformed(ActionEvent e)
{
clearBtn_actionPerformed(e);
}
});
sendBtn.setFocusable(false);
sendBtn.setToolTipText("Send drawing to friend");
sendBtn.addActionListener(new ActionListener(){
publicvoid actionPerformed(ActionEvent e)
{
sendBtn_actionPerformed(e);
}
});
}
privatevoid circBtn_actionPerformed(ActionEvent e)
{
circBtn.requestFocus();
System.out.println("This is the Circle Button test");
// TODO: Add any handling code here
option = 1;
}
privatevoid rectBtn_actionPerformed(ActionEvent e)
{
rectBtn.requestFocus();
System.out.println("This is the Rect Button test");
// TODO: Add any handling code here
drawingArea.requestFocus();
option = 2;
}
privatevoid lineBtn_actionPerformed(ActionEvent e)
{
lineBtn.requestFocus();
System.out.println("This is the Line Button test");
// TODO: Add any handling code here
option = 3;
}
privatevoid eraseBtn_actionPerformed(ActionEvent e)
{
eraseBtn.requestFocus();
System.out.println("This is the Erase Button test");
// TODO: Add any handling code here
option = 4;
}
privatevoid clearBtn_actionPerformed(ActionEvent e)
{
clearBtn.requestFocus();
System.out.println("This is the Clear Button test");
// TODO: Add any handling code here
drawingArea.repaint();
message.setText("Canvas cleared!");
}
privatevoid sendBtn_actionPerformed(ActionEvent e)
{
sendBtn.requestFocus();
System.out.println("This is the Send Button test");
// TODO: Add any handling code here
// img = new BufferedImage(this.getWidth(), this.getHeight(),BufferedImage.TYPE_INT_RGB);
try{
ImageIO.write(img,"bmp",new File("drawingArea"));
ByteArrayOutputStream baos =new ByteArrayOutputStream();
ImageIO.write(img,"png", baos);
byte[] imagebytes = baos.toByteArray();
img = ImageIO.read(new ByteArrayInputStream(imagebytes));
}catch(IOException ioe){
System.out.println(ioe.getMessage());
}
}
//when the mouse is pressed, a point is formed
publicvoid mousePressed(MouseEvent e){
drawingArea.requestFocus();
startX = mousex = e.getX();// Save coords of mouse position.
startY = mousey = e.getY();
oldPoint = e.getPoint();
String msg = ("Mouse Pressed: (" + oldPoint.x +", " + oldPoint.y +")");
System.out.println(msg);
message.setText(msg);
s ="";
}
//mouseDragged will do the line drawing
publicvoid mouseDragged(MouseEvent e){
mousex = e.getX();
mousey = e.getY();
currentPoint = e.getPoint();
String msg ="Mouse Dragged: (" + currentPoint.x +", " + currentPoint.y +")";
System.out.println(msg);
message.setText(msg);
if(option == 1){
Graphics g = img.createGraphics();
drawOval(g);
}
if (option == 2){
Graphics g = img.createGraphics();
drawRect(g);
}
elseif (option == 3){
drawingArea.getGraphics().drawLine(currentPoint.x, currentPoint.y, oldPoint.x, oldPoint.y);
}
elseif (option == 4){
Graphics g = img.createGraphics();
g.setColor(Color.white);
g.fillOval(oldPoint.x,oldPoint.y,20,20);
}
oldPoint = currentPoint;//set the oldPoint to the most recent coordinates
}
publicvoid mouseReleased(MouseEvent e){
endx = e.getX();
endy = e.getY();
System.out.println(endx +" "+endy);
}
publicvoid keyTyped(KeyEvent e){
drawingArea.requestFocus();
s = s + e.getKeyChar();
drawingArea.getGraphics().drawString(s, oldPoint.x, oldPoint.y);
Font font =new Font("Arial", Font.BOLD, 12);
fm = getFontMetrics(font);
}
void drawRect(Graphics g){
int x, y;// Top left corner of the rectangle.
int w, h;// Width and height of the rectangle.
// x,y,w,h must be computed from the coordinates
// of the two corner points.
if (mousex > startX){
x = startX;
w = mousex - startX;
}
else{
x = mousex;
w = startX - mousex;
}
if (mousey > startY){
y = startY;
h = mousey - startY;
}
else{
y = mousey;
h = startY - mousey;
}
g.setColor(Color.white);
g.fillRect(x, y, w, h);
g.setColor(Color.black);
g.drawRect(x, y, w-1, h-1);
}
// end drawRect()
void drawOval(Graphics g){
int x, y;// Top left corner of the rectangle.
int w, h;// Width and height of the rectangle.
// x,y,w,h must be computed from the coordinates
// of the two corner points.
if (endx > startX){
x = startX;
w = endx - startX;
}
else{
x = endx;
w = startX - endx;
}
if (endy > startY){
y = startY;
h = endy - startY;
}
else{
y = endy;
h = startY - endy;
}
g.setColor(Color.white);
g.fillOval(x, y, w, h);
g.fillRect(x,y,w/2,h/2);
g.setColor(Color.black);
g.drawOval(x, y, w-1, h-1);
}
// end drawRect()
//abstract methods promised by the MouseListener and MouseMotionListener interfaces
publicvoid mouseEntered(MouseEvent e){}
publicvoid mouseExited(MouseEvent e){}
//public void mouseReleased(MouseEvent e){}
publicvoid mouseClicked(MouseEvent e){}
publicvoid mouseMoved(MouseEvent e){}
publicvoid keyReleased(KeyEvent e){}
publicvoid keyPressed(KeyEvent e){}
}
