Adds tool tips to a table using a renderer : JTabbedPane « Swing « Java Tutorial

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2. Swing
3. JTabbedPane

/*
 *
 * Copyright (c) 1998 Sun Microsystems, Inc. All Rights Reserved.
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 * provided that i) this copyright notice and license appear on all copies of
 * the software; and ii) Licensee does not utilize the software in a manner
 * which is disparaging to Sun.
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 * This software is provided "AS IS," without a warranty of any kind. ALL
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 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
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import java.awt.Component;
import java.awt.Dimension;
import java.awt.GridLayout;

import javax.swing.DefaultCellEditor;
import javax.swing.JComboBox;
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.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;

public class TableRenderDemo extends JPanel {
  private boolean DEBUG = false;

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

    JTable table = new JTable(new MyTableModel());
    table.setPreferredScrollableViewportSize(new Dimension(500, 70));

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

    // Set up column sizes.
    initColumnSizes(table);

    // Fiddle with the Sport column's cell editors/renderers.
    setUpSportColumn(table, table.getColumnModel().getColumn(2));

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

  /*
   * This method picks good column sizes. If all column heads are wider than the
   * column's cells' contents, then you can just use column.sizeWidthToFit().
   */
  private void initColumnSizes(JTable table) {
    MyTableModel model = (MyTableModel) table.getModel();
    TableColumn column = null;
    Component comp = null;
    int headerWidth = 0;
    int cellWidth = 0;
    Object[] longValues = model.longValues;
    TableCellRenderer headerRenderer = table.getTableHeader().getDefaultRenderer();

    for (int i = 0; i < 5; i++) {
      column = table.getColumnModel().getColumn(i);

      comp = headerRenderer.getTableCellRendererComponent(null, column.getHeaderValue(), false,
          false, 0, 0);
      headerWidth = comp.getPreferredSize().width;

      comp = table.getDefaultRenderer(model.getColumnClass(i)).getTableCellRendererComponent(table,
          longValues[i], false, false, 0, i);
      cellWidth = comp.getPreferredSize().width;

      if (DEBUG) {
        System.out.println("Initializing width of column " + i + ". " + "headerWidth = "
            + headerWidth + "; cellWidth = " + cellWidth);
      }

      // XXX: Before Swing 1.1 Beta 2, use setMinWidth instead.
      column.setPreferredWidth(Math.max(headerWidth, cellWidth));
    }
  }

  public void setUpSportColumn(JTable table, TableColumn sportColumn) {
    // Set up the editor for the sport cells.
    JComboBox comboBox = new JComboBox();
    comboBox.addItem("Snowboarding");
    comboBox.addItem("Rowing");
    comboBox.addItem("Knitting");
    comboBox.addItem("Speed reading");
    comboBox.addItem("Pool");
    comboBox.addItem("None of the above");
    sportColumn.setCellEditor(new DefaultCellEditor(comboBox));

    // Set up tool tips for the sport cells.
    DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
    renderer.setToolTipText("Click for combo box");
    sportColumn.setCellRenderer(renderer);
  }

  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 final Object[] longValues = { "Sharon", "Campione", "None of the above",
        new Integer(20), Boolean.TRUE };

    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];
    }

    /*
     * JTable uses this method to determine the default renderer/ editor for
     * each cell. If we didn't implement this method, then the last column would
     * contain text ("true"/"false"), rather than a check box.
     */
    public Class getColumnClass(int c) {
      return getValueAt(0, c).getClass();
    }

    /*
     * Don't need to implement this method unless your table's editable.
     */
    public boolean isCellEditable(int row, int col) {
      // Note that the data/cell address is constant,
      // no matter where the cell appears onscreen.
      if (col < 2) {
        return false;
      } else {
        return true;
      }
    }

    /*
     * Don't need to implement this method unless your table's data can change.
     */
    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();
      }
    }
  }

  public static void main(String[] args) {
    JFrame frame = new JFrame("TableRenderDemo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

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

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

14.51.JTabbedPane
	14.51.1.	First usage of JTabbedPane
	14.51.2.	Adding and Removing Tabs
	14.51.3.	Get the index of the first tab that matches an icon
	14.51.4.	Changing tab's title, icon, mnemonic, tooltip, or component on a particular tab with one of the setXXXAt() methods
	14.51.5.	Adds tool tips to a table using a renderer
	14.51.6.	Specifying a tab's location: TOP, BOTTOM, LEFT, or RIGHT
	14.51.7.	Changing background, foreground and icon
	14.51.8.	To remove a tab, you can remove a specific tab with removeTabAt(int index), remove(int index), or remove(Component component)
	14.51.9.	Listening for Selected Tab Changes
	14.51.10.	TabLayout Policy: SCROLL_TAB_LAYOUT or WRAP_TAP_LAYOUT
	14.51.11.	Add Components to JTabbedPane
	14.51.12.	New Methods in the JTabPane Component (Add component to JTabPane)
	14.51.13.	JTabPane with TextField in the tab
	14.51.14.	Add user icon to tab panel
	14.51.15.	Add Button to tab bar
	14.51.16.	Add a tab with a label taken from the name of the component
	14.51.17.	Add a tab with a label at the end of all tabs
	14.51.18.	Add a tab with a label and icon at the end of all tabs
	14.51.19.	Add a tab with a label, icon, and tool tip at the end of all tabs
	14.51.20.	Getting the Tabs in a JTabbedPane Container
	14.51.21.	Enable Scrolling Tabs in a JTabbedPane Container
	14.51.22.	Enabling the Selection of a Tab in a JTabbedPane Container Using a Keystroke
	14.51.23.	Enabling and Disabling a Tab in a JTabbedPane Container
	14.51.24.	Setting the Color of a Tab in a JTabbedPane Container
	14.51.25.	Setting the Tool Tip for a Tab in a JTabbedPane Container
	14.51.26.	Setting the Location of the Tabs in a JTabbedPane Container
	14.51.27.	Determining When the Selected Tab Changes in a JTabbedPane Container
	14.51.28.	Moving a Tab in a JTabbedPane Container
	14.51.29.	Insert a tab after the first tab
	14.51.30.	Get the index of the tab by matching the child component
	14.51.31.	Getting and Setting the Selected Tab in a JTabbedPane Container
	14.51.32.	Setting the Size of the Divider in a JSplitPane Container
	14.51.33.	Customizing a JTabbedPane Look and Feel