java - Swing JTable - Highlight selected cell in a different color from rest of the selected row?

Question

I have a basic swing JTable and the requirement is that when clicked on any cell, the entire row should be highlighted, and also that the cell which was clicked should be a different color from the rest of the highlighted row.

Currently, I have isRowSelectionAllowed as true

I tried using a custom TableCellRenderer which is as follows:

public class CustomTableCellRenderer extends DefaultTableCellRenderer
{

public static final DefaultTableCellRenderer    DEFAULT_RENDERER    = new DefaultTableCellRenderer();
    @Override
  public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
    Component c = DEFAULT_RENDERER.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);

    if (isSelected) {
        c.setBackground(Color.red);
    }
    else {
        c.setForeground(Color.black);
        c.setBackground(Color.white);
    }
    return c;   
  }     
}

But that did not seem to work (entire row was highlighted in red).

I also tried setting the UIManager property as follows:

UIManager.put("Table.focusCellBackground", 
         new javax.swing.plaf.ColorUIResource (Color.red));

But that does not seem to work either (even though, when I tried setting a border using

UIManager.put("Table.focusCellHighlightBorder", 
         new BorderUIResource.LineBorderUIResource(Color.red)); 

that worked well)

Could you please give any suggestions what I might need to do?

Answer 1

Try this:

jtable.setCellSelectionEnabled(true);

Then in the getTableCellRendererComponent

if (table.isCellSelected(row, column))
    setForeground(Color.red);
else if (table.isRowSelected(row))
    setForeground(Color.green);
else if (table.isColumnSelected(column))
    setForeground(Color.blue);
else
    setForeground(Color.black);

That will render the selected cell in red, the rest of the row in green, and the rest of the column in blue. Note: cell selection requires the selection model be single, other selection models may cause unpredictable behaviors.