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MyTable.java
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MyTable.java
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import java.awt.*;
import java.awt.event.*;
import java.util.Random;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
class MyTable extends JPanel implements Observer{
// public Data d;
JTextField xentry, yentry;
JTable tbl;
MyCanvas canvas;
boolean rand_fill = true;
Random seed = new Random();
public String[] colNames = { "x-axis", "y-axis", };
public Object[][] data;
DefaultTableModel dtm = new DefaultTableModel(data, colNames);
public MyTable() {
build();
}
public void build() {
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
canvas = new MyCanvas();
gbc.gridwidth = 4; gbc.gridheight = 3;
gbc.weightx = 1; gbc.weighty = 1;
gbc.fill = GridBagConstraints.BOTH;
gbc.anchor = GridBagConstraints.CENTER;
add(canvas, gbc);
JButton clear_btn = new JButton("Clear");
gbc.gridx = 4; gbc.gridy = 0;
gbc.weightx = 0; gbc.weighty = 0;
gbc.gridwidth = 1; gbc.gridheight = 1;
gbc.fill = GridBagConstraints.HORIZONTAL;
add(clear_btn, gbc);
JButton pop_btn = new JButton(" Pop ");
gbc.gridx = 5; gbc.gridy = 0;
gbc.insets = new Insets(0, 0, 0, 1);
add(pop_btn, gbc);
tbl = new JTable(dtm);
tbl.setPreferredScrollableViewportSize(new Dimension(100, 80));
JScrollPane scrollPane = new JScrollPane(tbl);
tbl.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
gbc.gridx = 4; gbc.gridy = 2;
gbc.weightx = 0; gbc.weighty = 0;
gbc.gridwidth = 2; gbc.gridheight = 1;
gbc.insets = new Insets(0, 0, 0, 0);
gbc.fill = GridBagConstraints.BOTH;
add(scrollPane, gbc);
JLabel label = new JLabel("x: ");
gbc.gridwidth = 1; gbc.gridheight = 1;
gbc.gridx = 2; gbc.gridy = 3;
gbc.weightx = 1; gbc.weighty = 0;
gbc.fill = GridBagConstraints.NONE;
gbc.anchor = GridBagConstraints.LINE_END;
add(label, gbc);
label = new JLabel("y: ");
gbc.gridy = 4;
add(label, gbc);
xentry = new JTextField();
xentry.setText("0.0");
gbc.gridx = 3; gbc.gridy = 3;
gbc.weightx = 1; gbc.weighty = 0;
gbc.fill = GridBagConstraints.HORIZONTAL;
add(xentry, gbc);
yentry = new JTextField();
yentry.setText("0.0");
gbc.gridy = 4;
add(yentry, gbc);
JButton add_btn = new JButton("Add");
gbc.gridx = 4; gbc.gridy = 3;
gbc.weightx = 0; gbc.weighty = 0;
gbc.gridwidth = 2; gbc.gridheight = 2;
gbc.fill = GridBagConstraints.BOTH;
gbc.anchor = GridBagConstraints.CENTER;
add(add_btn, gbc);
JCheckBox rand_gen = new JCheckBox("Random Generate", true);
gbc.gridx = 0; gbc.gridy = 3;
gbc.gridwidth = 1; gbc.gridheight = 1;
add(rand_gen, gbc);
add_btn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
add_data_point();
}
});
pop_btn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int row_no = tbl.getRowCount()-1;
if(row_no < 0) return;
dtm.removeRow(row_no);
canvas.data.remove(row_no);
repaint();
xentry.setText(String.valueOf(tbl.getRowCount()));
}
});
rand_gen.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
rand_fill = !rand_fill;
}
});
clear_btn.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
canvas.data.clear();
dtm.setRowCount(0);
repaint();
xentry.setText(String.valueOf(tbl.getRowCount()));
}});
// int condition = JComponent.WHEN_IN_FOCUSED_WINDOW;
// InputMap inputMap = tbl.getInputMap(condition);
// ActionMap actionMap = tbl.getActionMap();
// // DELETE is a String constant that for me was defined as "Delete"
// inputMap.put(KeyStroke.getKeyStroke("DELETE"), "delete");
// actionMap.put("delete", new AbstractAction() {
// public void actionPerformed(ActionEvent e) {
// // TODO: do deletion action here
// System.out.println("Delete the row");
// }});
// tbl.addActionListener(new ActionListener() {
// public void actionPerformed(ActionEvent e) {
// if (tbl.getSelectedRow() < 0) return;
// int row_no = tbl.getSelectedRow();
// dtm.removeRow(tbl.getSelectedRow());
// canvas.data.remove(row_no);
// repaint();
// }});
}
public void add_data_point() {
String sx = xentry.getText();
String sy = yentry.getText();
int _x = 0;
int _y = 0;
if (sx != "")
_x = (int) Double.parseDouble(sx);
if (sy != "")
_y = (int) Double.parseDouble(sy);
Object[] newdata = { _x, _y };
dtm.addRow(newdata);
canvas.data.add(_y);
Data d = new Data();
d.addObserver(this);
d.addObserver(canvas);
d.add(_x, _y);
}
public void dataUpdate(Data d) {
if (rand_fill) {
xentry.setText(String.valueOf(tbl.getRowCount()));
yentry.setText(String.valueOf(50 * seed.nextDouble()));
}
}
}