| For example, consider an application where the user types in a name and you wish to display a phone number associated with the name. The mappings between names and numbers can be stored in a collection such as a com.sas.collection.Dictionary. Using property linking, you can link the text property of a com.sas.awt.TextField to the key property of a Selector. Then, link the value property of the selector to the phone number TextField. Finally, set the Dictionary as the selector's collection using the setCollection(Object) method. |
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When the Name: field changes, it fires a
PropertyChangeEvent
and the selector's key property is updated with the new name.
The selector will then select the corresponding value from the
collection
and fire a PropertyChangeEvent, which will cause the Phone:
text field to update with the phone number associated with the name.
By also linking the Phone: text field's text property to the selector's value property and linking the selector's key to the name TextField, you can also do reverse lookups: enter a phone number and the name associated with the phone number will be sent to the Name: field: |
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| You may also cascade selectors if you have more complex indexing schemes. For example, if you wish to select an item from a two dimensional array based on two indices, cascade the selectors as in the following picture. |
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