CSH.DisplayHelpFromFocus

java.lang.Object
- javax.help.CSH.DisplayHelpFromFocus

All Implemented Interfaces:

java.awt.event.ActionListener, java.util.EventListener

Enclosing class:

CSH
```
public static class CSH.DisplayHelpFromFocus
extends java.lang.Object
implements java.awt.event.ActionListener
```
An ActionListener that displays the help of the object that currently has focus. This method is used to enable HelpKey action listening for components other than the RootPane. This listener determines if the object with the current focus has a helpID. If it does, the helpID is displayed, otherwise the helpID on the action's source is displayed (if one exists).

See Also:

HelpBroker.enableHelpKey

Constructor Summary

Constructors
Constructor	Description
`DisplayHelpFromFocus(HelpBroker hb)`
`DisplayHelpFromFocus(HelpSet hs, java.lang.String presentation, java.lang.String presentationName)`	Create a DisplayHelpFromFocus actionListener for a given HelpSet.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

void actionPerformed(java.awt.event.ActionEvent e)
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - DisplayHelpFromFocus
```
public DisplayHelpFromFocus(HelpBroker hb)
```
  - DisplayHelpFromFocus
```
public DisplayHelpFromFocus(HelpSet hs,
                            java.lang.String presentation,
                            java.lang.String presentationName)
```
    Create a DisplayHelpFromFocus actionListener for a given HelpSet. Display the results in specific Presentation of given PresentationName.
    
    Parameters:
    
    hs - A valid HelpSet.
    
    presention - A valid javax.help.Presentation class. Throws an IllegalArgumentException if the presentation class cannot instantiated.
    
    name - The name of the presentation. This will retrieve the presentation details from the HelpSet hs if one exists. For some Presentation this name will also indicate the "named" Presentation to display the information in.
    
    Throws:
    
    java.lang.NullPointerException - if hs is Null.
    
    java.lang.IllegalArgumentException - if presentation is not valid.
- Method Detail
  - actionPerformed
```
public void actionPerformed(java.awt.event.ActionEvent e)
```
    Specified by:
    
    actionPerformed in interface java.awt.event.ActionListener