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EOPickTextAssociation
- Inherits from:
- EOValueAssociation : EOWidgetAssociation : EOAssociation : EODelayedObserver (EOControl) : Object
- Implements:
- NSDisposable
- EOObserving (EOControl)
- Package:
- com.webobjects.eointerface
Class Description
An EOPickTextAssociation takes the value of its display object, such as an NSTextField, and uses it to form a qualifier with up to three LIKE operators, each compared to a different key of the EODisplayGroup. This allows the user to perform a similarity search based on whole or partial values.
EOPickTextAssociations are most often used with a table view to qualify a list of fetched objects that is too long for convenient scrolling.
Usable With |
Any NSControl |
Aspects | |
matchKey1 |
An attribute to match using a LIKE qualifier. |
matchKey2 |
An attribute to match using a LIKE qualifier. |
matchKey3 |
An attribute to match using a LIKE qualifier. |
Object Keys Taken | |
target |
The EOPickTextAssociation applies its qualifier when sent an action message from the NSControl. |
delegate |
The EOPickTextAssociation applies its qualifier when sent a controlTextDidChange message, causing dynamic update as the user types. |
Example
Make an EOPickTextAssociation between an NSTextField and an EODisplayGroup of People objects. Bind the matchKey1 and matchKey2 aspects to the "lastName" and "firstName" keys. If the user types "Bi" in the field, the EOPickTextAssociation applies the following qualifier to the EODisplayGroup:
(lastName like "*Bi*") OR (firstName like "*Bi*")
which matches names like "Bill Smith" and "Joe Biggs". The list of objects displayed in the display group is restricted to those that match the qualifier.
Interfaces Implemented
- NSDisposable
- EOObserving
Method Types
- All methods
- EOPickTextAssociation
- displayValueAspect
- primaryAspect
Constructors
EOPickTextAssociation
public EOPickTextAssociation(Object aDisplayObject)
You normally set up associations with the Interface Builder application, in which case you don't need to create them programmatically. However, if you do create them up programmatically, setting them up is a multi-step process. After creating an association, you must bind its aspects and establish its connections.
See Also: bindAspect (EOAssociation), establishConnection (EOAssociation)
Instance Methods
displayValueAspect
protected String displayValueAspect()
primaryAspect
public String primaryAspect()
© 2001 Apple Computer, Inc. (Last Published April 21, 2001)