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Geertjan's Blog

  • June 12, 2009

How to Incorporate a Wizard into a Griffon Application (Part 3)

Geertjan Wielenga
Product Manager
I've solved several problems I had with integrating a db into a Griffon wizard, with this result:

In other words, though I can successfully populate a drop-down list with customer names and put related city and state information into the output, I am unable to bind that output to the related text fields. I wonder how the @Bindable annotation works in the context of wizards. Or maybe it should be solved in a different way.

Here's conf/DataSource.groovy:

dataSource {
url = "jdbc:derby://localhost:1527/sample"
driverClassname = "org.apache.derby.jdbc.ClientDriver"
username = "app"
password = "app"
}

Here's conf/Events.groovy:

onBootstrapEnd = { app ->
def dataSource = new ConfigSlurper().parse(DataSource).dataSource
MyDbService dbs = MyDbService.instance
dbs.initDataSource(dataSource)
}

Here's services/MyDbService.groovy:

import groovy.sql.Sql
@Singleton
class MyDbService {
private sql
def initDataSource( dataSource ) {
sql = Sql.newInstance(
dataSource.url,
dataSource.username,
dataSource.password,
dataSource.driverClassname
)
}
def getAllNames() {
sql.rows("select \* from APP.CUSTOMER").NAME
}
def getCityForSelectedName(String selectedName) {
sql.firstRow("select CITY from APP.CUSTOMER where NAME = ${selectedName}").CITY
}
def getStateForSelectedName(String selectedName) {
sql.firstRow("select STATE from APP.CUSTOMER where NAME = ${selectedName}").STATE
}
}

And, finally, here's wizards/OneWizardPage.groovy, where the change in 'selCity' should be reflected in the City text field. Both parts are highlighted below.

import net.miginfocom.swing.MigLayout
import ca.odell.glazedlists.\*
import javax.swing.event.ListSelectionListener
import java.util.Map
import ca.odell.glazedlists.swing.EventSelectionModel
import ca.odell.glazedlists.swing.EventListModel
class OneWizardPage {
def stepId = "step1" // must be unique per WizardPage
def description = "Customer Details"
def autoListen = true
def selCity = '<empty>'
def selState = '<empty>'
def pageContents = {
EventList namesEventList = new BasicEventList()
namesEventList.addAll( MyDbService.instance.getAllNames() )
EventListModel listModel = new EventListModel(namesEventList)
EventSelectionModel selectionModel = new EventSelectionModel(namesEventList)selectionModel.addListSelectionListener( [ valueChanged: {e ->
if (e.valueIsAdjusting){
def customer = selectionModel.selected
selCity = MyDbService.instance.getCityForSelectedName(customer)
selState = MyDbService.instance.getStateForSelectedName(customer)
println "${customer} from ${selCity} (${selState})"
}
} ] as ListSelectionListener)

panel(border:lineBorder(1, color: java.awt.Color.black), layout: new MigLayout('fill')) {
label( text: "Name:" )
scrollPane(constraints: "growx, wrap"){
list( name: "tf1", model: listModel, selectionModel: selectionModel, visibleRowCount: 1 )
}
label( text: "Address:" )cityField = textField( name: "tf2",
text: selCity,
columns: 20, constraints: "wrap" )

label( text: "City:" )
textField( name: "tf3", text: "", columns: 20 )
}
}
// Either return a String that indicates a problem
// or return a null value indicating no problem
def onValidate = { component, /\*PropertyChangeEvent\*/ event ->
return null // no problems
}
}

Can anyone help?

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