Change Text for JButton rendered in a JTable

[Shreyas Rane]

Hi,

I am trying to change JButton text on mouse click, the JButton is rendered in a JTable.
JButton text gets changed for that JButton but it is not reflected in JTable..
Can any one tell where am i going wrong???

import java.awt.Component;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.SystemColor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.border.EtchedBorder;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;

import com.edex.MainApp.PageList;
import com.edex.controller.DefaultComboBoxController;

public class TableRenderDemo extends JPanel {
	
	private JTable table;
	private TableRenderDemoModel model;
	private static JLabel lblEmployeeInformation;
	private int fromIndex=0;
	private int toIndex=0;
	private boolean searchFlag = false;
	
	private static final int indexWidth = 75;
	private static final int firstNameWidth = 200;
	private static final int middleNameWidth = 200;
	private static final int lastNameWidth = 200;
	private static final int enrollWidth = 80;
	private static final int cancelWidth = 80;

	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			@Override
			public void run() {
				createShowGUI();
			}
		});
	}
	
	private static void createShowGUI() {
		JFrame frame = new JFrame("Table Render Demo");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		JPanel newContentPane = new TableRenderDemo();
		newContentPane.setOpaque(true);
		frame.setContentPane(newContentPane);
		frame.setMinimumSize(newContentPane.getMinimumSize());

		frame.pack();
		frame.setVisible(true);
	}
	
	public TableRenderDemo() {
		super();
		setBounds(0,0,992,722);
		setLayout(null);
		
		model = new TableRenderDemoModel();
		/*sorter = new TableRowSorter<TableRenderDemoModel>(model);*/
		table = new JTable(model);
		
		TableCellRenderer indexRenderer = table.getDefaultRenderer(JLabel.class);
		((JLabel) indexRenderer).setHorizontalAlignment(JLabel.LEFT);
		
		TableColumn indexColumn = table.getColumn("Index");
		indexColumn.setCellRenderer(indexRenderer);
		indexColumn.setMaxWidth(indexWidth);
		
		TableColumn employeeIdColumn = table.getColumn("EmployeeId");
		table.getColumnModel().removeColumn(employeeIdColumn);

		TableColumn firstNameColumn = table.getColumn("FirstName");
		firstNameColumn.setMaxWidth(firstNameWidth);
		
		TableColumn middleNameColumn = table.getColumn("MiddleName");
		middleNameColumn.setMaxWidth(middleNameWidth);
		
		TableColumn lastNameColumn = table.getColumn("LastName");
		lastNameColumn.setMaxWidth(lastNameWidth);
		
		TableColumn enrollColumn = table.getColumn("Enroll");
		enrollColumn.setMaxWidth(enrollWidth);
		
		TableColumn cancelColumn = table.getColumn("Cancel");
		cancelColumn.setMaxWidth(cancelWidth);
		
		TableCellRenderer buttonRenderer = new JTableButtonRenderer();
		enrollColumn.setCellRenderer(buttonRenderer);
		cancelColumn.setCellRenderer(buttonRenderer);
		table.addMouseListener(new JTableButtonMouseListener(table));
		
		/*table.setRowSorter(sorter);*/
		
		table.setPreferredScrollableViewportSize(new Dimension(500, 150));
		table.setFillsViewportHeight(true);

		table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		
		lblPageCount.setText("["+(fromIndex+1)+"-"+toIndex+"/"+TableRenderDemoModel.getTotalRowCount()+"]");
				
		JScrollPane scrollPane = new JScrollPane(table);
		scrollPane.setBounds(27, 45, 836, 477);
		scrollPane.setViewportView(table);
		gridNameList.add(scrollPane);
		
	}
	
	private final class JTableButtonRenderer implements TableCellRenderer {		
		@Override 
		public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
			JButton	button = (JButton)value; 
			if (isSelected) {
				button.setForeground(table.getSelectionForeground());
				button.setBackground(table.getSelectionBackground());
		    } else {
		    	button.setForeground(table.getForeground());
		    	button.setBackground(UIManager.getColor("Button.background"));
		    }
			return button;	
		}
	}

	private final class JTableButtonMouseListener extends MouseAdapter {
		private JTable table;
		
		public JTableButtonMouseListener(JTable table) {
			this.table = table;
		}

		public void mouseClicked(MouseEvent e) {
			int column = table.getColumnModel().getColumnIndexAtX(e.getX());
			int row = e.getY()/table.getRowHeight(); 
			if (row < table.getRowCount() && row >= 0 && column < table.getColumnCount() && column >= 0) {
			    Object value = table.getValueAt(row, column);
			    Integer employeeId = 0;
			    if(column==4) {
			    	employeeId = Integer.parseInt(table.getModel().getValueAt(row, column).toString());
			    }
			    else if(column==5) {
			    	employeeId = Integer.parseInt(table.getModel().getValueAt(row, column-1).toString());
			    }
			 			  
			    System.out.println("EMP ID: "+employeeId);
			    if (value instanceof JButton) {
			    	((JButton)value).doClick();
                                System.out.println(((JButton)(value)).getText()); // <-- prints Enroll 
 			        ((JButton)(value)).setText("Cancel");                   // <-- text of button changed
   			        System.out.println(((JButton)(value)).getText()); // <-- prints Cancel

			    }
			}
		}
	}
	
}

[Michael Dunn]

> Can any one tell where am i going wrong???

to be honest with you, most people won't read more than a handful of lines (would you?)

if you have a problem, posting the code is great, but we have to be able to compile/run it,
to understand/see the problem.

these lines don't help.

import com.edex.MainApp.PageList;
import com.edex.controller.DefaultComboBoxController;

[Rob Spoor]

Well, these two imports aren't used anymore, but removing them still leaves 5 compiler errors.

Shreyas, please turn your code into an SSCCE.

[Rob Camick]

Your concept of a renderer is wrong. A renderer is used to display the data found in the TableModel.

So your renderer needs to set the text of the button based on the data in the TableModel. If you want to change the text that is displayed on the button then you need to update the TableModel to the new text value. Then you tell the table to repaint that cell and your renderer will automatically pick up the new text from the model.