codice:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.util.*;
public class PaintTable extends JPanel
{
private static JPanel topPanel = new JPanel();
private static JButton annulla = new JButton("Annulla");
private static JButton cancella = new JButton("Cancella");
private static String[] colorNames = {"Nero","Blu","Verde","Giallo","Rosso","Bianco"};
private static JComboBox colors = new JComboBox(colorNames);
private static String[] typeNames = {"Linea retta","Rettangolo","Cerchio"};
private static JComboBox types = new JComboBox(typeNames);
private static JCheckBox rov = new JCheckBox("Figura piena");
private Color[] color = new Color[99999];
private Color[] colorList = {Color.BLACK,Color.BLUE,Color.GREEN,Color.YELLOW,Color.RED,Color.WHITE};
private Point[] points1 = new Point[99999];
private Point[] points2 = new Point[99999];
private Point pointT;
private Point pointT2;
private boolean start = false;
private int countP = 0;
private byte[] type = new byte[99999];
private boolean[] filled = new boolean[99999];
private static JPanel bottomPanel = new JPanel();
private static JLabel label = new JLabel("Cursore del mouse fuori dal pannello");
//************************************************************************************************
private static JCheckBox gradient = new JCheckBox("Gradiente");
private static JButton firstColor = new JButton("Colore 1");
private static JButton secondColor = new JButton("Colore 2");
private static JLabel lineW = new JLabel("Spessore:");
private static JTextField lineWfield = new JTextField(2);
private static JLabel lineD = new JLabel("Lunghezza tratteggi:");
private static JTextField lineDfield = new JTextField(2);
private static JCheckBox dashed = new JCheckBox("Tratteggi");
private float spessore = 0f;
private float spessoreV[] = new float[99999];
private Color firstColorG = Color.BLACK;
private Color secondColorG = Color.BLACK;
private Color[] fColorV = new Color[99999];
private Color[] sColorV = new Color[99999];
private boolean[] gradientBoolean = new boolean[99999];
private boolean[] dashedBoolean = new boolean[99999];
private float[] dashedV = new float[99999];
private float[] dashedSingle = {0f};
//************************************************************************************************
private static JButton Load = new JButton("Apri file");
private static JButton Save = new JButton("Salva file");
private static JFileChooser chooser;
private static File file;
private static Formatter output;
public PaintTable()
{
setBackground(Color.WHITE);
lineWfield.setText(""+(int)spessore);
for (int i=0;i<99999;i++)
{
filled[i] = false;
}
firstColor.addActionListener
(
new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
Color colorTemp = JColorChooser.showDialog(new JFrame(),"Seleziona primo colore",firstColorG);
if (colorTemp != null)
{
firstColorG = colorTemp;
}
}
}
);
secondColor.addActionListener
(
new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
Color colorTemp = JColorChooser.showDialog(new JFrame(),"Seleziona secondo colore",secondColorG);
if (colorTemp != null)
{
secondColorG = colorTemp;
}
}
}
);
lineWfield.addActionListener
(
new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
spessore = Float.valueOf(lineWfield.getText()).floatValue();
}
}
);
lineDfield.addActionListener
(
new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
dashedSingle[0] = Float.valueOf(lineDfield.getText()).floatValue();
}
}
);
gradient.addItemListener
(
new ItemListener()
{
public void itemStateChanged(ItemEvent event)
{
if (gradient.isSelected())
{
firstColor.setEnabled(true);
secondColor.setEnabled(true);
}
else
{
firstColor.setEnabled(false);
secondColor.setEnabled(false);
}
}
}
);
dashed.addItemListener
(
new ItemListener()
{
public void itemStateChanged(ItemEvent event)
{
if (dashed.isSelected())
{
lineDfield.setEnabled(true);
}
else
{
lineDfield.setEnabled(false);
}
}
}
);
annulla.addActionListener
(
new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
countP--;
points1[countP].x = 0;
points1[countP].y = 0;
points2[countP].x = 0;
points2[countP].y = 0;
pointT.x = 0;
pointT.y = 0;
pointT2.x = 0;
pointT2.y = 0;
repaint();
}
}
);
cancella.addActionListener
(
new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
countP = 0;
pointT.x = 0;
pointT.y = 0;
pointT2.x = 0;
pointT2.y = 0;
for (int i=0;i<countP;i++)
{
points1[i].x = 0;
points1[i].y = 0;
points2[i].x = 0;
points2[i].y = 0;
}
repaint();
}
}
);
addMouseListener
(
new MouseAdapter()
{
public void mousePressed(MouseEvent event)
{
start = true;
points1[countP] = event.getPoint();
pointT = event.getPoint();
}
public void mouseReleased(MouseEvent event)
{
points2[countP] = event.getPoint();
repaint();
countP++;
}
public void mouseExited(MouseEvent event)
{
label.setText("Cursore del mouse fuori dal pannello");
}
}
);
addMouseMotionListener
(
new MouseMotionAdapter()
{
public void mouseDragged(MouseEvent event)
{
points2[countP] = event.getPoint();
pointT2 = event.getPoint();
for (int i=0;i<colorNames.length;i++)
{
if (colors.getSelectedIndex() == i)
{
color[countP] = colorList[i];
spessoreV[countP] = spessore;
}
}
label.setText(""+event.getX()+", "+event.getY());
repaint();
}
public void mouseMoved(MouseEvent event)
{
label.setText(""+event.getX()+","+event.getY());
}
}
);
/*Load.addActionListener
(
new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
JFileChooser chooser = new JFileChooser();
chooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
chooser.setDialogTitle("Apri file");
int c = chooser.showOpenDialog(this);
if (c == JFileChooser.APPROVE_OPTION)
{
}
}
}
);*/
Save.addActionListener
(
new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
file = SaveFile();
String string = file.toString();
output = new Formatter(string+".txt");
for (byte i = 0; i < countP; i++)
{
output.format("%d %d %d %d\n",points1[i].x,points1[i].y,points2[i].x,points2[i].y);
}
file.close();
}
}
);
}
public static File SaveFile()
{
chooser = new JFileChooser();
chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
int c = chooser.showSaveDialog(new JFrame());
if (c == JFileChooser.APPROVE_OPTION)
{
return JFileChooser.getSelectedFile();
}
else
{
return null;
}
}
public void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D gg = (Graphics2D) g;
gg.setStroke(new BasicStroke(spessore));
if (types.getSelectedIndex() == 0)
{
type[countP] = 0;
}
else if (types.getSelectedIndex() == 1)
{
type[countP] = 1;
}
else
{
type[countP] = 2;
}
dashedBoolean[countP] = dashed.isSelected() ? true : false;
filled[countP] = rov.isSelected() ? true : false;
gradientBoolean[countP] = gradient.isSelected() ? true : false;
fColorV[countP] = firstColorG;
sColorV[countP] = secondColorG;
for (int i=0;i<countP;i++)
{
if (dashedBoolean[i])
{
gg.setStroke(new BasicStroke(spessoreV[i],BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND,10,dashedSingle,0));
}
else
{
gg.setStroke(new BasicStroke(spessoreV[i]));
}
if (gradientBoolean[i])
{
gg.setPaint(new GradientPaint(0,0,fColorV[i],10,20,sColorV[i],true));
}
else
{
g.setColor(color[i]);
}
if (type[i] == 0)
{
g.drawLine(points1[i].x,points1[i].y,points2[i].x,points2[i].y);
}
else if (type[i] == 1)
{
if (!filled[i])
{
g.drawRect(points1[i].x,points1[i].y,points2[i].x-points1[i].x,points2[i].y-points1[i].y);
}
else
{
g.fillRect(points1[i].x,points1[i].y,points2[i].x-points1[i].x,points2[i].y-points1[i].y);
}
}
else
{
if (!filled[i])
{
g.drawOval(points1[i].x,points1[i].y,points2[i].x-points1[i].x,points2[i].y-points1[i].y);
}
else
{
g.fillOval(points1[i].x,points1[i].y,points2[i].x-points1[i].x,points2[i].y-points1[i].y);
}
}
}
if (start)
{
if (dashed.isSelected())
{
gg.setStroke(new BasicStroke(spessore,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND,10,dashedSingle,0));
}
else
{
gg.setStroke(new BasicStroke(spessore));
}
if (gradient.isSelected())
{
gg.setPaint(new GradientPaint(0,0,firstColorG,10,20,secondColorG,true));
}
else
{
g.setColor(color[countP]);
}
if (type[countP] == 0)
{
g.drawLine(pointT.x,pointT.y,pointT2.x,pointT2.y);
}
else if (type[countP] == 1)
{
if (rov.isSelected())
{
g.fillRect(pointT.x,pointT.y,pointT2.x-pointT.x,pointT2.y-pointT.y);
}
else
{
g.drawRect(pointT.x,pointT.y,pointT2.x-pointT.x,pointT2.y-pointT.y);
}
}
else
{
if (rov.isSelected())
{
g.fillOval(pointT.x,pointT.y,pointT2.x-pointT.x,pointT2.y-pointT.y);
}
else
{
g.drawOval(pointT.x,pointT.y,pointT2.x-pointT.x,pointT2.y-pointT.y);
}
}
}
}
public static void main(String[] args)
{
JFrame frame = new JFrame("Paint");
frame.setSize(640,480);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
PaintTable table = new PaintTable();
topPanel.setLayout(new GridLayout(2,1));
JPanel subUpPanel = new JPanel();
subUpPanel.add(Load);
subUpPanel.add(Save);
subUpPanel.add(annulla);
subUpPanel.add(cancella);
colors.setMaximumRowCount(4);
subUpPanel.add(colors);
subUpPanel.add(types);
subUpPanel.add(rov);
topPanel.add(subUpPanel,BorderLayout.NORTH);
JPanel subDownPanel = new JPanel();
subDownPanel.add(gradient);
firstColor.setEnabled(false);
subDownPanel.add(firstColor);
secondColor.setEnabled(false);
subDownPanel.add(secondColor);
subDownPanel.add(lineW);
subDownPanel.add(lineWfield);
subDownPanel.add(lineD);
lineDfield.setEnabled(false);
subDownPanel.add(lineDfield);
subDownPanel.add(dashed);
topPanel.add(subDownPanel,BorderLayout.CENTER);
frame.add(topPanel,BorderLayout.NORTH);
frame.add(table,BorderLayout.CENTER);
frame.add(label,BorderLayout.SOUTH);
frame.setVisible(true);
}
}
Ci sono due errori (che ho evidenziato in grassetto) che non riesco a comprendere: il primo è che non mi riconosce il metodo close() per chiudere il Formatter, nonostante abbia importato la libreria java.io.*;. Il secondo errore è :"non-static method getSelectedFile() cannot be referenced from a static context"... non capisco quindi, dov'è che devo inserire getSelectedFile(). Qualche idea? 
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