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Eclipse Platform
Release 3.0

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org.eclipse.jface.viewers
Interface ICellModifier

public interface ICellModifier

A cell modifier is used to access the data model from a cell editor in an abstract way. It offers methods to:

• to check if a a model element's property can be edited or not
• retrieve a value a model element's property
• to store a cell editor's value back into the model element's property

This interface should be implemented by classes that wish to act as cell modifiers.

Method Summary

boolean	canModify(Object element, String property) Checks whether the given property of the given element can be modified.
Object	getValue(Object element, String property) Returns the value for the given property of the given element.
void	modify(Object element, String property, Object value) Modifies the value for the given property of the given element.

Method Detail

canModify

public boolean canModify(Object element,
                         String property)

Checks whether the given property of the given element can be modified.

Parameters:

element - the element

property - the property

Returns:

true if the property can be modified, and false if it is not modifiable

getValue

public Object getValue(Object element,
                       String property)

Returns the value for the given property of the given element. Returns null if the element does not have the given property.

Parameters:

element - the element

property - the property

Returns:

the property value

modify

public void modify(Object element,
                   String property,
                   Object value)

Modifies the value for the given property of the given element. Has no effect if the element does not have the given property, or if the property cannot be modified.

Note that it is possible for an SWT Item to be passed instead of the model element. To handle this case in a safe way, use:

     if (element instanceof Item) {
         element = ((Item) element).getData();
     }
     // modify the element's property here
 

Parameters:

element - the model element or SWT Item (see above)

property - the property

value - the new property value

See Also:

Item