JTable related problem

[Anand Loni]

Hi,

I am using JTable. I want 1st column as a header(i.e RowHeader). Headers should have border like BevelBorder(Raised). Want I select cell say (1,2) i.e first row and second column then headers of the cell should be highlighed like bevel border of first column 1st row and second column should be lowered. Like Microsoft Excel. I am using rendrer but I am unable to do it.

Hoping for reply..

[Michael Dunn]

https://coderanch.com/t/342171/GUI/java/Turn-JTable-Sideways

[Anand Loni]

that doesn't solves my problem..... :-(

[Craig Wood]

import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
import javax.swing.table.*;
 
public class Headers
{
    private JTable getTable()
    {
        int rows = 32;
        int cols = 4;
        String[] ids = { "", "column 1", "column 2", "column 3" };
        Object[][] data = new Object[rows][cols];
        for(int row = 0; row < rows; row++)
            for(int col = 0; col < cols; col++)
                data[row][col] = col == 0 ? "row " + row
                                          : "item " + (row*(cols-1) + col);
        DefaultTableModel model = new DefaultTableModel(data, ids);
        JTable table = new JTable(model);
        return configureTable(table);
    }
 
    private JTable configureTable(JTable table)
    {
        table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        TableColumnModel colModel = table.getColumnModel();
        TableColumn col = colModel.getColumn(0);
        col.setCellRenderer(new CustomRowRenderer());
        CustomColumnRenderer ccr = new CustomColumnRenderer(table);
        for(int j = 1; j < colModel.getColumnCount(); j++)
            colModel.getColumn(j).setHeaderRenderer(ccr);
        table.getSelectionModel().addListSelectionListener(
                   new RowSelectionListener(table));
        colModel.getSelectionModel().addListSelectionListener(
                   new ColumnSelectionListener(table));
        return table;
    }
 
    public static void main(String[] args)
    {
        Headers test = new Headers();
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setContentPane(new JScrollPane(test.getTable()));
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
    }
}
 
class CustomRowRenderer extends DefaultTableCellRenderer
{
    int selectedRow;
 
    public CustomRowRenderer()
    {
        setHorizontalAlignment(JLabel.CENTER);
        setBackground(UIManager.getColor("TableHeader.background"));
        selectedRow = -1;
    }
 
    public Component getTableCellRendererComponent(JTable table,
                                                   Object value,
                                                   boolean isSelected,
                                                   boolean hasFocus,
                                                   int row, int column)
    {
        super.getTableCellRendererComponent(table, value, isSelected,
                                            hasFocus, row, column);
        if(row == selectedRow)
            setBorder(BorderFactory.createLoweredBevelBorder());
        else
            setBorder(BorderFactory.createRaisedBevelBorder());
        return this;
    }
 
    public void setSelectedRow(int selected)
    {
        selectedRow = selected;
        repaint();
    }
}
 
class CustomColumnRenderer extends DefaultTableCellRenderer
{
    JTable table;
    int selectedColumn;
    Border border;
 
    public CustomColumnRenderer(JTable table)
    {
        this.table = table;
        selectedColumn = -1;
        border = UIManager.getBorder("TableHeader.cellBorder");
        setHorizontalAlignment(JLabel.CENTER);
    }
 
    public Component getTableCellRendererComponent(JTable table,
                                                   Object value,
                                                   boolean isSelected,
                                                   boolean hasFocus,
                                                   int row, int column)
    {
        super.getTableCellRendererComponent(table, value, isSelected,
                                            hasFocus, row, column);
        if(column == selectedColumn)
            setBorder(border);
        else
            setBorder(BorderFactory.createRaisedBevelBorder());
        return this;
    }
 
    public void setSelectedColumn(int selected)
    {
        selectedColumn = selected;
        table.getTableHeader().repaint();
    }
}
 
class RowSelectionListener implements ListSelectionListener
{
    JTable table;
 
    public RowSelectionListener(JTable table) { this.table = table; }
 
    public void valueChanged(ListSelectionEvent e)
    {
        ListSelectionModel model = (ListSelectionModel)e.getSource();
        int index = model.getLeadSelectionIndex();
        CustomRowRenderer renderer =
            (CustomRowRenderer)table.getColumnModel().getColumn(0).getCellRenderer();
        renderer.setSelectedRow(index);
    }
}
 
class ColumnSelectionListener implements ListSelectionListener
{
    JTable table;
 
    public ColumnSelectionListener(JTable table) { this.table = table; }
 
    public void valueChanged(ListSelectionEvent e)
    {
        if(!e.getValueIsAdjusting())
        {
            ListSelectionModel model = (ListSelectionModel)e.getSource();
            int index = model.getLeadSelectionIndex();
            TableColumn col = table.getColumnModel().getColumn(index);
            CustomColumnRenderer renderer =
                (CustomColumnRenderer)col.getHeaderRenderer();
            if(index > 0)
                renderer.setSelectedColumn(index);
        }
    }
}