A JOutlookBar provides a component that is similar to a JTabbedPane, but instead of maintaining tabs
//package net.jcdev.utils;
//Import the GUI classes
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
/**
* A JOutlookBar provides a component that is similar to a JTabbedPane, but
* instead of maintaining tabs, it uses Outlook-style bars to control the
* visible component
*/
public class JAccordion extends JPanel implements ActionListener {
private static final long serialVersionUID = -2760245005186933366L;
/**
* The top panel: contains the buttons displayed on the top of the
* JOutlookBar
*/
private JPanel topPanel = new JPanel(new GridLayout(1, 1));
/**
* The bottom panel: contains the buttons displayed on the bottom of the
* JOutlookBar
*/
private JPanel bottomPanel = new JPanel(new GridLayout(1, 1));
/**
* A LinkedHashMap of bars: we use a linked hash map to preserve the order
* of the bars
*/
private Map<String, BarInfo> bars = new LinkedHashMap<String, BarInfo>();
/**
* The currently visible bar (zero-based index)
*/
private int visibleBar = 0;
/**
* A place-holder for the currently visible component
*/
private JComponent visibleComponent = null;
/**
* Creates a new JOutlookBar; after which you should make repeated calls to
* addBar() for each bar
*/
public JAccordion() {
this.setLayout(new BorderLayout());
this.add(topPanel, BorderLayout.NORTH);
this.add(bottomPanel, BorderLayout.SOUTH);
}
/**
* Adds the specified component to the JOutlookBar and sets the bar's name
*
* @param name
* The name of the outlook bar
* @param componenet
* The component to add to the bar
*/
public void addBar(String name, JComponent component) {
BarInfo barInfo = new BarInfo(name, component);
barInfo.getButton().addActionListener(this);
this.bars.put(name, barInfo);
render();
}
/**
* Adds the specified component to the JOutlookBar and sets the bar's name
*
* @param name
* The name of the outlook bar
* @param icon
* An icon to display in the outlook bar
* @param componenet
* The component to add to the bar
*/
public void addBar(String name, Icon icon, JComponent component) {
BarInfo barInfo = new BarInfo(name, icon, component);
barInfo.getButton().addActionListener(this);
this.bars.put(name, barInfo);
render();
}
/**
* Removes the specified bar from the JOutlookBar
*
* @param name
* The name of the bar to remove
*/
public void removeBar(String name) {
this.bars.remove(name);
render();
}
/**
* Returns the index of the currently visible bar (zero-based)
*
* @return The index of the currently visible bar
*/
public int getVisibleBar() {
return this.visibleBar;
}
/**
* Programmatically sets the currently visible bar; the visible bar index
* must be in the range of 0 to size() - 1
*
* @param visibleBar
* The zero-based index of the component to make visible
*/
public void setVisibleBar(int visibleBar) {
if (visibleBar > 0 && visibleBar < this.bars.size() - 1) {
this.visibleBar = visibleBar;
render();
}
}
/**
* Causes the outlook bar component to rebuild itself; this means that it
* rebuilds the top and bottom panels of bars as well as making the
* currently selected bar's panel visible
*/
public void render() {
// Compute how many bars we are going to have where
int totalBars = this.bars.size();
int topBars = this.visibleBar + 1;
int bottomBars = totalBars - topBars;
// Get an iterator to walk through out bars with
Iterator<String> itr = this.bars.keySet().iterator();
// Render the top bars: remove all components, reset the GridLayout to
// hold to correct number of bars, add the bars, and "validate" it to
// cause it to re-layout its components
this.topPanel.removeAll();
GridLayout topLayout = (GridLayout) this.topPanel.getLayout();
topLayout.setRows(topBars);
BarInfo barInfo = null;
for (int i = 0; i < topBars; i++) {
String barName = (String) itr.next();
barInfo = (BarInfo) this.bars.get(barName);
this.topPanel.add(barInfo.getButton());
}
this.topPanel.validate();
// Render the center component: remove the current component (if there
// is one) and then put the visible component in the center of this
// panel
if (this.visibleComponent != null) {
this.remove(this.visibleComponent);
}
this.visibleComponent = barInfo.getComponent();
this.add(visibleComponent, BorderLayout.CENTER);
// Render the bottom bars: remove all components, reset the GridLayout
// to
// hold to correct number of bars, add the bars, and "validate" it to
// cause it to re-layout its components
this.bottomPanel.removeAll();
GridLayout bottomLayout = (GridLayout) this.bottomPanel.getLayout();
bottomLayout.setRows(bottomBars);
for (int i = 0; i < bottomBars; i++) {
String barName = (String) itr.next();
barInfo = (BarInfo) this.bars.get(barName);
this.bottomPanel.add(barInfo.getButton());
}
this.bottomPanel.validate();
// Validate all of our components: cause this container to re-layout its
// subcomponents
validate();
}
/**
* Invoked when one of our bars is selected
*/
public void actionPerformed(ActionEvent e) {
int currentBar = 0;
for (Iterator<String> i = this.bars.keySet().iterator(); i.hasNext();) {
String barName = (String) i.next();
BarInfo barInfo = (BarInfo) this.bars.get(barName);
if (barInfo.getButton() == e.getSource()) {
// Found the selected button
this.visibleBar = currentBar;
render();
return;
}
currentBar++;
}
}
/**
* Debug, dummy method
*/
public static JPanel getDummyPanel(String name) {
JPanel panel = new JPanel(new BorderLayout());
panel.add(new JLabel(name, JLabel.CENTER));
return panel;
}
/**
* Debug test...
*/
public static void main(String[] args) {
JFrame frame = new JFrame("JOutlookBar Test");
JAccordion outlookBar = new JAccordion();
outlookBar.addBar("One",
getDummyPanel("Onexxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxo"));
outlookBar.addBar("Two", getDummyPanel("Two"));
outlookBar.addBar("Three", getDummyPanel("Three"));
outlookBar.addBar("Four", getDummyPanel("Four"));
outlookBar.addBar("Five", getDummyPanel("Five"));
outlookBar.setVisibleBar(2);
// outlookBar.setPreferredSize(new Dimension(400, 400));
frame.getContentPane().setLayout(new BorderLayout());
frame.getContentPane().add(outlookBar, BorderLayout.CENTER);
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
frame.setLocation(d.width / 2 - 400, d.height / 2 - 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
/**
* Internal class that maintains information about individual Outlook bars;
* specifically it maintains the following information:
*
* name The name of the bar button The associated JButton for the bar
* component The component maintained in the Outlook bar
*/
class BarInfo {
/**
* The name of this bar
*/
private String name;
/**
* The JButton that implements the Outlook bar itself
*/
private JButton button;
/**
* The component that is the body of the Outlook bar
*/
private JComponent component;
/**
* Creates a new BarInfo
*
* @param name
* The name of the bar
* @param component
* The component that is the body of the Outlook Bar
*/
public BarInfo(String name, JComponent component) {
this.name = name;
this.component = component;
this.button = new JButton(name);
}
/**
* Creates a new BarInfo
*
* @param name
* The name of the bar
* @param icon
* JButton icon
* @param component
* The component that is the body of the Outlook Bar
*/
public BarInfo(String name, Icon icon, JComponent component) {
this.name = name;
this.component = component;
this.button = new JButton(name, icon);
}
/**
* Returns the name of the bar
*
* @return The name of the bar
*/
public String getName() {
return this.name;
}
/**
* Sets the name of the bar
*
* @param The
* name of the bar
*/
public void setName(String name) {
this.name = name;
}
/**
* Returns the outlook bar JButton implementation
*
* @return The Outlook Bar JButton implementation
*/
public JButton getButton() {
return this.button;
}
/**
* Returns the component that implements the body of this Outlook Bar
*
* @return The component that implements the body of this Outlook Bar
*/
public JComponent getComponent() {
return this.component;
}
}
}
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