tricolaire
08-22-2006, 01:47 AM
I am trying to write a program which draws an image on the screen, allows the user to draw on top of that image, and then saves a jpg of what the user drew, MINUS THE ORIGINAL IMAGE.
here is the source:
//
// image_tracer.java
// image tracer
//
// Created by Erik Schmidt on 8/21/06.
// Copyright (c) 2006 __MyCompanyName__. All rights reserved.
//
import java.util.*;
import javax.imageio.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import java.io.*;
import java.awt.image.*;
import java.util.ArrayList;
import java.awt.Graphics;
import java.net.*;
import java.applet.*;
class MyPanel extends JPanel {
Graphics save;
Image blank;
Image face;
ArrayList x;
ArrayList y;
ImageObserver ob;
private class MListen implements MouseMotionListener {
public void mouseDragged(MouseEvent e){
x.add(new Integer(e.getX()));
y.add(new Integer(e.getY()));
repaint();
}
public void mouseMoved(MouseEvent e){
//do nothing
}
}
public MyPanel(Image f){
x=new ArrayList();
y=new ArrayList();
IMAGE b=new IMAGE();
blank=b.run("/Users/erikschmidt90/Sites/blank.jpg");
face=f;
addMouseMotionListener(new MListen());
x.add(new Integer(-30));
y.add(new Integer(-30));
}
public void paintComponent(Graphics g){
g.drawImage(face,0,0,ob);
save=createImage(500,500).getGraphics();
save.drawImage(blank,0,0,null);
g.setColor(Color.black);
save.setColor(Color.black);
g.drawImage(face,0,0,ob);
for(int i=0;i<x.size();i++){
save.fillOval(((Integer)x.get(i)).intValue(),((Integer)y.get(i)).intValue(),20,20);
g.fillOval(((Integer)x.get(i)).intValue(),((Integer)y.get(i)).intValue(),20,20);
}
}
public Graphics getSave(){
return save;
}
}
class WListen extends WindowAdapter {
public void WindowClosed(WindowEvent e){
System.exit(0);
}
}
class MainFrame extends JFrame {
MyPanel panel;
JButton submit;
JPanel main;
public MainFrame(Image face){
super("Image Tracer");
setSize(750,750);
panel=new MyPanel(face);
submit=new JButton("Save");
submit.addActionListener(new MyActionListener());
main=new JPanel(new BorderLayout());
main.add(panel,BorderLayout.CENTER);
main.add(submit,BorderLayout.SOUTH);
setContentPane(main);
}
private class MyActionListener implements ActionListener {
public void actionPerformed(ActionEvent e){
Object source=e.getSource();
if(source==submit){
BufferedImage w=new BufferedImage(500,500,BufferedImage.TYPE_INT_RGB);
Graphics g=w.getGraphics();
g=panel.getSave().create();
try{
ImageIO.write(w,"jpg",new File("Output.jpg"));
}catch(Exception ex){
System.out.println(ex);
}
}
}
}
}
class IMAGE {
public Image run(String filename){
return Toolkit.getDefaultToolkit().createImage(filename);
}
}
public class image_tracer {
public static void main (String args[]) {
IMAGE image=new IMAGE();
MainFrame frame=new MainFrame(image.run("/Users/erikschmidt90/Sites/face.jpg"));
frame.addWindowListener(new WListen());
frame.show();
}
}
the line about ImageIO only draws an all black image, not what the user drew
how do I get the second graphics context to the file, regardless of the format?
here is the source:
//
// image_tracer.java
// image tracer
//
// Created by Erik Schmidt on 8/21/06.
// Copyright (c) 2006 __MyCompanyName__. All rights reserved.
//
import java.util.*;
import javax.imageio.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import java.io.*;
import java.awt.image.*;
import java.util.ArrayList;
import java.awt.Graphics;
import java.net.*;
import java.applet.*;
class MyPanel extends JPanel {
Graphics save;
Image blank;
Image face;
ArrayList x;
ArrayList y;
ImageObserver ob;
private class MListen implements MouseMotionListener {
public void mouseDragged(MouseEvent e){
x.add(new Integer(e.getX()));
y.add(new Integer(e.getY()));
repaint();
}
public void mouseMoved(MouseEvent e){
//do nothing
}
}
public MyPanel(Image f){
x=new ArrayList();
y=new ArrayList();
IMAGE b=new IMAGE();
blank=b.run("/Users/erikschmidt90/Sites/blank.jpg");
face=f;
addMouseMotionListener(new MListen());
x.add(new Integer(-30));
y.add(new Integer(-30));
}
public void paintComponent(Graphics g){
g.drawImage(face,0,0,ob);
save=createImage(500,500).getGraphics();
save.drawImage(blank,0,0,null);
g.setColor(Color.black);
save.setColor(Color.black);
g.drawImage(face,0,0,ob);
for(int i=0;i<x.size();i++){
save.fillOval(((Integer)x.get(i)).intValue(),((Integer)y.get(i)).intValue(),20,20);
g.fillOval(((Integer)x.get(i)).intValue(),((Integer)y.get(i)).intValue(),20,20);
}
}
public Graphics getSave(){
return save;
}
}
class WListen extends WindowAdapter {
public void WindowClosed(WindowEvent e){
System.exit(0);
}
}
class MainFrame extends JFrame {
MyPanel panel;
JButton submit;
JPanel main;
public MainFrame(Image face){
super("Image Tracer");
setSize(750,750);
panel=new MyPanel(face);
submit=new JButton("Save");
submit.addActionListener(new MyActionListener());
main=new JPanel(new BorderLayout());
main.add(panel,BorderLayout.CENTER);
main.add(submit,BorderLayout.SOUTH);
setContentPane(main);
}
private class MyActionListener implements ActionListener {
public void actionPerformed(ActionEvent e){
Object source=e.getSource();
if(source==submit){
BufferedImage w=new BufferedImage(500,500,BufferedImage.TYPE_INT_RGB);
Graphics g=w.getGraphics();
g=panel.getSave().create();
try{
ImageIO.write(w,"jpg",new File("Output.jpg"));
}catch(Exception ex){
System.out.println(ex);
}
}
}
}
}
class IMAGE {
public Image run(String filename){
return Toolkit.getDefaultToolkit().createImage(filename);
}
}
public class image_tracer {
public static void main (String args[]) {
IMAGE image=new IMAGE();
MainFrame frame=new MainFrame(image.run("/Users/erikschmidt90/Sites/face.jpg"));
frame.addWindowListener(new WListen());
frame.show();
}
}
the line about ImageIO only draws an all black image, not what the user drew
how do I get the second graphics context to the file, regardless of the format?