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Scout/Concepts/LookupCall
The Scout documentation has been moved to https://eclipsescout.github.io/.
Lookup calls are used by The Scout documentation has been moved to https://eclipsescout.github.io/. and The Scout documentation has been moved to https://eclipsescout.github.io/. to look up single or multiple The Scout documentation has been moved to https://eclipsescout.github.io/..
- Class: The Scout documentation has been moved to https://eclipsescout.github.io/.
Contents
Description
LookupCalls can be used in smart fields, tree boxes and other Scout widgets. They compute the Smart association: to a key a The Scout documentation has been moved to https://eclipsescout.github.io/.is associated. This enable to provide more than a text to the key (The lookupRow also contains an Icon, Colors, a TooltipText...)
This schema explains the role of a LookupCall in a SmartField:
Input
Lookup calls provide different method to compute the set of The Scout documentation has been moved to https://eclipsescout.github.io/. :
-
getDataByKey()
Retrieve a single lookup row for a specific key value. Used by SmartFields and SmatColumns to get the display text for a given value. -
getDataByText()
: Retrieve multiple lookup rows which match a certain String. Used by SmartFields when the user start to enter some text in the Field. -
getDataByAll()
: Retrieves all available lookup rows. Used by SmartFields when the user clic on the browse icon. -
getDataByRec()
: This can only be used for hierarchical lookup calls. It retrieves all available sub-tree lookup rows for a given parent.
Type of lookup calls
With a Lookup Service
Delegation to the The Scout documentation has been moved to https://eclipsescout.github.io/. on server side.
They are not necessarily restricted to a fix number of records. Instead they should be favoured if the set of records is rather large.
Directy
Principe of the The Scout documentation has been moved to https://eclipsescout.github.io/.
An example of this approach is when a SmartField or a SmartColumn is configured to be use with a The Scout documentation has been moved to https://eclipsescout.github.io/.. A The Scout documentation has been moved to https://eclipsescout.github.io/. is instantiated for the CodeType. It creates the LookupRows corresponding to the The Scout documentation has been moved to https://eclipsescout.github.io/. in the CodeType.
Overview
Properties
Defined with The Scout documentation has been moved to https://eclipsescout.github.io/. methods.
- The Scout documentation has been moved to https://eclipsescout.github.io/.: Defines which service is used to retrieve lookup rows
- The Scout documentation has been moved to https://eclipsescout.github.io/.: Defines whether a master value must be set in order to query for multiple lookup rows
Code example
Using a LookupCall in a SmartField
Accessing a LookupRow directly
It is possible to access a LookupRow direclty. In this example the input is a key (thisKey
) and the method getDataByKey()
is used.
Before accessing the text, we ensure that a LookupRow has been retrived.
//Execute the LookupCall (using DataByKey) LookupCall call = new MyLookupCall(); call.setKey(thisKey); LookupRow[] rows=call.getDataByKey(); //Get the text (with a null check) String text = null; if(rows != null && rows.length > 0) { text = rows[0].getText(); }
See Also
- The Scout documentation has been moved to https://eclipsescout.github.io/.
- The Scout documentation has been moved to https://eclipsescout.github.io/.
- The Scout documentation has been moved to https://eclipsescout.github.io/.
- The Scout documentation has been moved to https://eclipsescout.github.io/.