CODEWITHSUNDEEP
javaswingjtablerendering
Harshit Saklecha
Harshit Saklecha

Reputation: 100

How to color rows of JTable according to particular value of attribute

I have JTable, and I want the result in the table to have rows colored according to particular value of attribute; comp is null here:

private JNI18NTable _issueIncidentTable = new JNI18NTable(I18N_ID, COLUMNS, "issue.table.") {
        public Component prepareRenderer(TableCellRenderer renderer, int row, int col) {
            Component comp = super.prepareRenderer(renderer, row, col);

            int RangeIndex = Utilities.rowIndexToRangeIndex(_resultIter, row);
            Row theRow = _resultIter.getRowAtRangeIndex(RangeIndex);
            System.out.println("the row is" + theRow.getAttribute("Type"));
            boolean markRow = theRow != null && theRow.getAttribute("Type").toString().equals("c");
            boolean isSelected = isRowSelected(row);
            System.out.println("the comp" + comp);
            if (markRow) {
                comp.setForeground(Color.white);
                comp.setBackground(isRowSelected(row) ? Color.red.darker() : Color.red);
            } else {
                comp.setForeground(isSelected ? getSelectionForeground() : getForeground());
                comp.setBackground(isSelected ? getSelectionBackground() : getBackground());
            }
            return comp;
        }
    };

Upvotes: 0

Views: 138

Answers (1)

trashgod
trashgod

Reputation: 205775

Extrapolating an sscce, your implementation of prepareRenderer() seems to work as shown below. You might look elsewhere in your code for the presumed problem. In particular, the implementation of Utilities.rowIndexToRangeIndex() should probably use the table's own convert method. Moreover, use the value of isSelected consistently.

image

import java.awt.Color;
import java.awt.Component;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;

/**
 * @see http://stackoverflow.com/a/20684058/230513
 */
public class Test {

    private void display() {
        JFrame f = new JFrame("Test");
        JTable table = new JTable(new DefaultTableModel(10, 1) {

            @Override
            public Object getValueAt(int row, int col) {
                return "Row " + row;
            }
        }) {
            @Override
            public Component prepareRenderer(TableCellRenderer renderer, int row, int col) {
                Component comp = super.prepareRenderer(renderer, row, col);

                boolean isSelected = isRowSelected(row);
                if (row % 2 == 0) {
                    comp.setForeground(Color.white);
                    comp.setBackground(isSelected ? Color.red.darker() : Color.red);
                } else {
                    comp.setForeground(isSelected ? getSelectionForeground() : getForeground());
                    comp.setBackground(isSelected ? getSelectionBackground() : getBackground());
                }
                return comp;
            }
        };
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(new JScrollPane(table));
        f.pack();
        f.setLocationRelativeTo(null);
        f.setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                new Test().display();
            }
        });
    }
}

Upvotes: 2

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