Java JTable With Tooltip

Chapter: Swing Last Updated: 08-06-2017 15:07:45 UTC

Program:

            /* ............... START ............... */
                package Swing;

import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableModel;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.MouseEvent;

public class JavaJTableWithTooltip extends JPanel {

	private boolean DEBUG = false;
	protected String[] columnToolTips = { null, null, "The person's favorite sport to participate in",
			"The number of years the person has played the sport", "If checked, the person eats no meat" };

	public JavaJTableWithTooltip() {
		super(new GridLayout(1, 0));

		JTable table = new JTable(new MyTableModel()) {

			// Implement table cell tool tips.
			public String getToolTipText(MouseEvent e) {
				String tip = null;
				java.awt.Point p = e.getPoint();
				int rowIndex = rowAtPoint(p);
				int colIndex = columnAtPoint(p);
				int realColumnIndex = convertColumnIndexToModel(colIndex);

				if (realColumnIndex == 2) { // Sport column
					tip = "This person's favorite sport to " + "participate in is: " + getValueAt(rowIndex, colIndex);
				} else if (realColumnIndex == 4) { // Veggie column
					TableModel model = getModel();
					String firstName = (String) model.getValueAt(rowIndex, 0);
					String lastName = (String) model.getValueAt(rowIndex, 1);
					Boolean veggie = (Boolean) model.getValueAt(rowIndex, 4);
					if (Boolean.TRUE.equals(veggie)) {
						tip = firstName + " " + lastName + " is a vegetarian";
					} else {
						tip = firstName + " " + lastName + " is not a vegetarian";
					}
				} else {
					// You can omit this part if you know you don't
					// have any renderers that supply their own tool
					// tips.
					tip = super.getToolTipText(e);
				}
				return tip;
			}

			// Implement table header tool tips.
			protected JTableHeader createDefaultTableHeader() {
				return new JTableHeader(columnModel) {
					public String getToolTipText(MouseEvent e) {
						String tip = null;
						java.awt.Point p = e.getPoint();
						int index = columnModel.getColumnIndexAtX(p.x);
						int realIndex = columnModel.getColumn(index).getModelIndex();
						return columnToolTips[realIndex];
					}
				};
			}
		};

		table.setPreferredScrollableViewportSize(new Dimension(500, 70));
		table.setFillsViewportHeight(true);

		// Create the scroll pane and add the table to it.
		JScrollPane scrollPane = new JScrollPane(table);

		// Add the scroll pane to this panel.
		add(scrollPane);
	}

	class MyTableModel extends AbstractTableModel {
		private String[] columnNames = { "First Name", "Last Name", "Sport", "# of Years", "Vegetarian" };
		private Object[][] data = { { "Mary", "Campione", "Snowboarding", new Integer(5), new Boolean(false) },
				{ "Alison", "Huml", "Rowing", new Integer(3), new Boolean(true) },
				{ "Kathy", "Walrath", "Knitting", new Integer(2), new Boolean(false) },
				{ "Sharon", "Zakhour", "Speed reading", new Integer(20), new Boolean(true) },
				{ "Philip", "Milne", "Pool", new Integer(10), new Boolean(false) } };

		public int getColumnCount() {
			return columnNames.length;
		}

		public int getRowCount() {
			return data.length;
		}

		public String getColumnName(int col) {
			return columnNames[col];
		}

		public Object getValueAt(int row, int col) {
			return data[row][col];
		}


		public Class getColumnClass(int c) {
			return getValueAt(0, c).getClass();
		}


		public boolean isCellEditable(int row, int col) {
			if (col < 2) {
				return false;
			} else {
				return true;
			}
		}

		public void setValueAt(Object value, int row, int col) {
			if (DEBUG) {
				System.out.println("Setting value at " + row + "," + col + " to " + value + " (an instance of "
						+ value.getClass() + ")");
			}

			data[row][col] = value;
			fireTableCellUpdated(row, col);

			if (DEBUG) {
				System.out.println("New value of data:");
				printDebugData();
			}
		}

		private void printDebugData() {
			int numRows = getRowCount();
			int numCols = getColumnCount();

			for (int i = 0; i < numRows; i++) {
				System.out.print("    row " + i + ":");
				for (int j = 0; j < numCols; j++) {
					System.out.print("  " + data[i][j]);
				}
				System.out.println();
			}
			System.out.println("--------------------------");
		}
	}

	/**
	 * Create the GUI and show it. For thread safety, this method should be
	 * invoked from the event-dispatching thread.
	 */
	private static void createAndShowGUI() {
		// Create and set up the window.
		JFrame frame = new JFrame("TableToolTipsDemo");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		// Create and set up the content pane.
		JComponent newContentPane = new JavaJTableWithTooltip();
		newContentPane.setOpaque(true); // content panes must be opaque
		frame.setContentPane(newContentPane);

		// Display the window.
		frame.pack();
		frame.setVisible(true);
	}

	public static void main(String[] args) {
		// Schedule a job for the event-dispatching thread:
		// creating and showing this application's GUI.
		javax.swing.SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				createAndShowGUI();
			}
		});
	}
}

                /* ............... END ............... */
        

Output


Java JTable With Tooltip

Tags

JTable With Tooltip, Java, Swing

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