Interface EnableCheck

All Known Implementing Classes:

public interface EnableCheck

A test for whether to enable or disable a menu, toolbar button, or other component. Provides a handy message about why a component is disabled.

See Also:

Method Summary
 java.lang.String check(javax.swing.JComponent component)
          Returns a non-null value if the check failed.

Method Detail


java.lang.String check(javax.swing.JComponent component)
Returns a non-null value if the check failed. Sometimes the return value is used (for example, it is displayed as a tooltip for menu-items); sometimes it is not (for example, toolbar buttons don't do anything with the return value). An advanced use of an EnableCheck is simply to change some property of a menu item (such as the text), as it is called when menu items are displayed.

an error message if the check failed, or null if the check passed