Hi guys! I wrote program, which read data from file(you can modify this file) and than it paints in to JPanel containing Canvas.But it doesn't work.
class MainWindow:
package my;
import my.MyCanvas;
import my.Rectangle;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import javax.swing.*;
import javax.swing.border.*;
import katka.Circle;
import katka.Shape;
public class MainWindow extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
private JButton open;
private JButton save;
private JButton clear;
private JButton but;
private JTextPane text1;
private MyCanvas canvas;
private JFileChooser fc;
private File file;
public MainWindow() {
setTitle("Zadanie2");
canvas = new MyCanvas();
canvas.setPreferredSize(new Dimension(200, 300));
fc = new JFileChooser();
// JTextPane text1 = new JTextPane();
text1 = new JTextPane();
text1.setEditable(true);
text1.setBorder(new TitledBorder("Editor"));
text1.setPreferredSize(new Dimension(220, 200));
/*
* JScrollPane scrol = new JScrollPane(); scrol.setViewportView(text1);
* //scrol.setBounds(10,80,375,350); scrol.setBorder(new
* TitledBorder("Editor")); scrol.setPreferredSize(new Dimension(220,
* 200)); scrol.add(text1);
*/
open = new JButton("Open");
save = new JButton("Save");
clear = new JButton("Clear");
open.addActionListener(this);
save.addActionListener(this);
clear.addActionListener(this);
but = new JButton("Ukaz");
but.addActionListener(this);
// canvas.add(new Circle(50, 50, 10));
// canvas.add(new Circle(10, 50, 20));
// canvas.add(new Rectangle(10, 10, 20, 20));
/*
* JPanel panel2 = new JPanel(); panel2.setLayout(new BorderLayout());
* panel2.add(scrol); panel2.setBorder(new TitledBorder("Editor"));
* panel2.setPreferredSize(new Dimension(220, 200));
*/
JPanel panel3 = new JPanel();
panel3.setLayout(new GridLayout(1, 1));
panel3.setBorder(new TitledBorder("Funkcie"));
panel3.add(open);
panel3.add(save);
panel3.add(clear);
panel3.add(but);
JPanel contentPane = new JPanel();
contentPane.setLayout(new BorderLayout());
contentPane.setBackground(Color.GREEN);
contentPane.add(canvas, BorderLayout.EAST);
contentPane.add(text1, BorderLayout.WEST);
contentPane.add(panel3, BorderLayout.SOUTH);
setSize(800, 800);
this.setContentPane(contentPane);
}
public void actionPerformed(ActionEvent e) {
try {
if (e.getSource() == open) {
int returnVal = fc.showOpenDialog(MainWindow.this);
file = fc.getSelectedFile();
if (returnVal == JFileChooser.APPROVE_OPTION) {
FileReader read = new FileReader(fc.getSelectedFile());
text1.read(read, file.toString());
}
} else if (e.getSource() == save) {
int returnVal = fc.showSaveDialog(MainWindow.this);
file = fc.getSelectedFile();
if (returnVal == JFileChooser.APPROVE_OPTION) {
}
BufferedWriter out = new BufferedWriter(new FileWriter(file));
text1.write(out);
out.flush();// pozriet na nete
out.close();
}
else if (e.getActionCommand().equals("Clear")) {
text1.setText(null);
}
else if (e.getSource() == but) {
show();
}
} catch (IOException exception1) {
JOptionPane.showMessageDialog(null, "File not found!");
}
catch (NullPointerException exception2) {
JOptionPane.showMessageDialog(null, "Nothing to save");
}
}
public void show() {
LinkedList<MyCanvas> objekt = new LinkedList<MyCanvas>();
int red = 0;
int green = 0;
int blue = 0;
int a = 0,b = 0;
int w = 0,h = 0,r = 0;
try{
Scanner scan = new Scanner(file);
String str = null;
while( scan.hasNext() ){
String line = scan.nextLine();
Scanner scan2;
int index = line.indexOf("{");
if (index != -1){
str = line.substring(0,index-1);
}
index = line.indexOf("Color");
if (index != -1){
scan2 = new Scanner(line.substring(index+8));
scan2.useDelimiter("[ ;]");
red = scan2.nextInt();
green = scan2.nextInt();
blue = scan2.nextInt();
}
index = line.indexOf("");
if (index != -1){
scan2 = new Scanner(line.substring(index+14));
scan2.useDelimiter("[ ;]");
a = scan2.nextInt();
b = scan2.nextInt();
}
index = line.indexOf("Size");
if (index != -1){
scan2 = new Scanner(line.substring(index+10));
scan2.useDelimiter("[ ;]");
w = scan2.nextInt();
h = scan2.nextInt();
}
index = line.indexOf("Radius");
if (index != -1){
scan2 = new Scanner(line.substring(index+10));
scan2.useDelimiter("[ ;]");
r = scan2.nextInt();
}
index = line.indexOf("}");
if (index != -1){
if ("Rectangle".equals(str)){
Color c = null;
if (r != -1){
c = new Color(red,green,blue);
}
objekt.add(new Rectangle(c, a, b, w, h));
} else {
Color c = null;
if (r != -1){
c = new Color(red,green,blue);
}
objekt.add(new Circle(c, a, b,r));
}
red = 0;
green = 0;
blue = 0;
a = 10;
b = 10;
w = 50;
h = 50;
r = 50;
}
}
} catch (Exception exp) {
//JOptionPane.showMessageDialog(null, exp.getMessage());
System.out.println(exp.getMessage());
}
}
public static void main(String[] args) {
MainWindow window = new MainWindow();
window.setVisible(true);
window.setLocation(500, 200);
window.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}
}
[B]class Rectangle:[/B]
package my;
import java.awt.*;
public class Rectangle extends MyCanvas {
private int height;
private int weight;
private int cornerX;
private int cornerY;
private Color color;
public Rectangle(Color color, int height, int weight, int cornerX, int cornerY) {
super();
this.height = height;
this.weight = weight;
this.cornerX = cornerX;
this.cornerY = cornerY;
this.color = color;
}
public Rectangle(String data){
}
public void draw(Graphics g){
g.setColor(color);
g.drawRect(height, weight, cornerX, cornerY);
}
}
[B]Class Circle:[/B]
package my;
import java.awt.*;
public class Circle extends MyCanvas {
private int r;
private int middleX;
private int middleY;
private Color color;
public Circle(Color color,int r, int middleX,int middleY) {
super();
this.r = r = 10;
this.middleX = middleX = 10;
this.middleY = middleY = 10;
this.color = color;
}
public void draw(Graphics g){
g.setColor(color);
g.drawOval(middleX, middleY, 2*r, 2*r);
}
}
[B]Class MyCanvas:[/B]
package my;
import java.awt.*;
import java.util.LinkedList;
public class MyCanvas extends Canvas{
private static final long serialVersionUID = 1L;
private LinkedList<Circle> circles;
private LinkedList<Rectangle> rectangles;
public MyCanvas(){
circles = new LinkedList<Circle>();
rectangles = new LinkedList<Rectangle>();
}
public void add(Circle circle){
circles.add(circle);
}
public void add(Rectangle rectangle){
rectangles.add(rectangle);
}
public void paint(Graphics g){
for(int i=0; i<circles.size(); i++) {
circles.get(i).draw(g);
}
for(int i=0; i<rectangles.size(); i++) {
rectangles.get(i).draw(g);
}
}
}
The input from file looks like this:
rectangle {
color = 255 0 255;
topLeft = 10 10;
size = 10 20;
}
rectangle {
topLeft = 40 50;
size = 20 20;
}
circle {
centre = 40 40;
radius = 20;
color = 0 0 255
}Thanks
