EnableCheck (OpenJUMP 2.4.0 API)

All Known Implementing Classes:

BooleanPropertyEnableCheck, CurrentLayerIsRasterImageLayerCheck, MultiEnableCheck, PropertyEnableCheck
```
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:

EnableCheckFactory

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  String check(JComponent component)
  Returns a non-null value if the check failed.

- Method Detail
  - check
```
String check(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.
    
    Returns:
    
    an error message if the check failed, or null if the check passed