SetValueAt Never Called in my table model
Hi my experience in Java is limited so please excuse my ignorance.
I created a table by doing this:
private JTable table =new JTable(model);
where model is a custom table model that extends AbstractTableModel.
Anyhow, It was to my understanding that if my cells were made editable through theisCellEditable method, then I could double click on a cell, change its value and after I hit enter or deselect the cell SetValueAt would be called. This isn't happening, so can someone tell me what I have to do to get this method called when the user does this?
Thanks
Andy
[688 byte] By [
Lokkea] at [2007-10-3 2:49:24]
Ok thank you everyone for your responses, I'm going to post some code.
Zadok, in response to your question if I understand you correctly the numbers are changing in the table, until I hit enter then it returns back to what it was.
Alot of the code isn't my own but from what I've pieced together from different sites. There are 3 files, the MyTableModel2, which uses a list to hold the data. The list holds "Part" components which is defined in Part class, andthen DemoProject which creates the table and and what not.
DemoProject.java
import javax.swing.*;
import java.awt.*;
public class DemoProject {
final static String LOOKANDFEEL = null;
private MyTableModel2 model = new MyTableModel2();
private JTable table = new JTable(model);
public DemoProject(){
Part temp = new Part();
temp.SetId(1);
temp.SetX(2);
temp.SetY(3);
model.add(temp);
}
public Component createComponents() {
//INITIALIZE TABLE
table.setPreferredScrollableViewportSize(new Dimension(200, 50));
JScrollPane scrollPane = new JScrollPane(table);
//INITIALIZE PANEL
JPanel pane = new JPanel(new GridLayout(0, 1));
pane.add(scrollPane);
return pane;
}
private static void createAndShowGUI() {
//Make sure we have nice window decorations.
JFrame.setDefaultLookAndFeelDecorated(true);
//Create and set up the window.
JFrame frame = new JFrame("test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
DemoProject app = new DemoProject();
Component contents = app.createComponents();
frame.getContentPane().add(contents, BorderLayout.CENTER);
//Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}
Ok now MyTableModel2.java
import java.util.List;
import java.util.ArrayList;
import javax.swing.table.AbstractTableModel;
import javax.swing.event.*;
//import javax.swing.CellEditor;
public class MyTableModel2 extends AbstractTableModel implements TableModelListener {
private static final long serialVersionUID = 224343431;
private static final String columnNames[] = {
"Vertex #", "X", "Y"
};
private List<Part> parts = new ArrayList<Part>();
public MyTableModel2()
{
addTableModelListener(this);
}
public void setParts( List<Part> parts ) {
if ( parts == null )
throw new IllegalArgumentException("Cannot set null parts");
this.parts = parts;
fireTableDataChanged(); // notify listeners
}
public void add( Part part ) {
part.SetId(parts.size()+1);
int ix = parts.size();
parts.add( part );
fireTableRowsInserted( ix, ix ); // notify listeners
}
public void add( List<Part> partList ) {
int n = partList.size();
if ( n == 0 )
return;
int ix = parts.size();
parts.addAll( partList );
fireTableRowsInserted( ix, ix + n - 1 );
}
public void remove( int row ) {
parts.remove( row );
fireTableRowsDeleted( row, row );
}
public Part getPrevious()
{
if (parts.size() >= 2)
{
return parts.get(parts.size()-2);
}
else return null;
}
// Implementation of TableModel's methods
public String getColumnName( int col ) {
return columnNames[col];
}
public int getColumnCount() {
return columnNames.length;
}
public int getRowCount() {
return parts.size();
}
public Object getValueAt( int row, int col ) {
Part part = parts.get(row);
switch ( col ) {
case 0: return part.getId();
case 1: return part.getX();
case 2: return part.getY();
}
return null;
}
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col < 1) {
return false;
} else {
return true;
}
}
public void setValueAt(int value, int row, int col) {
System.out.println("setValueAt called");
Part part = parts.get(row);
switch (col) {
case 1: part.SetX(value); break;
case 2: part.SetY(value); break;
}
parts.remove(row);
parts.add(row, part);
fireTableCellUpdated(row, col);
}
public void tableChanged(TableModelEvent e)
{
System.out.println("tableChanged called");
return;
}
}
and Finally Part.java
public class Part {
private int id;
private int x;
private int y;
public int getId(){
return id;
}
public int getX(){
return x;
}
public int getY(){
return y;
}
public String getName()
{
return "Part";
}
public void SetId (int input) {
this.id = input;
}
public void SetX (int input) {
this.x = input;
}
public void SetY (int input) {
this.y = input;
}
}
Again, what I'm looking for is a solution so that setValue method in the MyTableModel2 class is called whenever the user changes the cell value.
I didn't use DefaultTable because I wanted to use a list to hold the model data, and I figured it would be good experience?
Lokkea at 2007-7-14 20:38:11 >
