Hello, Dev List!
I am somewhat new at designing RCPs on the NetBeans Platform and have run
into a small issue. If anyone can point me in the right direction, I will
be very grateful.
I am working on a singleton class, FuelPurchaseManager, which stores the
data for the Proof of Concept for my project for making fuel purchases. I
have created a menu, Maintenance/Post Journals to Ledger. On this menu, I
have created the following Action:
package com.northwind.fuel.controller;
import com.northwind.fuel.model.FuelPurchaseManager;import
java.awt.event.ActionEvent;import java.awt.event.ActionListener;import
org.openide.loaders.DataObject;import org.openide.awt.ActionID;import
org.openide.awt.ActionReference;import
org.openide.awt.ActionRegistration;import
org.openide.util.NbBundle.Messages;
@ActionID(
category = "Maintenance",
id = "com.northwind.fuel.controller.PostJournalToGL"
)@ActionRegistration(
iconBase = "com/northwind/fuel/postToGL.png",
displayName = "#CTL_PostJournalToGL"
)@ActionReference(path = "Menu/Maintenance/Journals", position =
3233)@Messages("CTL_PostJournalToGL=Post Fuel Journal")public final
class PostJournalToGL implements ActionListener {
private final FuelPurchaseManager context;
public PostJournalToGL(FuelPurchaseManager context) {
this.context = context;
}
@Override
public void actionPerformed(ActionEvent ev) {
FuelPurchaseManager.getInstance().actionPerformed(ev);
}
}
I have set up the FuelPurchaseManager singleton as follows:
public class FuelPurchaseManager extends AbstractAction
implements LookupListener, ContextAwareAction {
public static final long serialVersionUID = 6597346658963L;
private static FuelPurchaseManager mgr = null;
private Lookup context;
Lookup.Result<FuelPurchaseManager> lkpInfo;
private final ArrayList<FuelPurchase> journal;
private FuelPurchaseManager() {
this.journal = new ArrayList<>();
/* *********************************************************************
* DEBUGGING CODE: The following code, until the "END
DEBUGGING" * * comment is for the Proof of Concept
only. It will need to be * * updated to ***actual***
business logic before we create a release * * build.
*
********************************************************************/
DateTimeFormatter fmt = DateTimeFormatter.ofPattern("MMM dd, yyyy");
this.journal.add(new FuelPurchase(
LocalDate.parse("Jan 14, 2020", fmt), // Tx date
540312, // Odometer
102.890, // # of gallons
2.765, // Price per gallon
284.49)); // Total price
this.journal.add(new FuelPurchase(
LocalDate.parse("Jan 17, 2020", fmt),
541990,
134.880,
2.493,
336.26));
this.journal.add(new FuelPurchase(
LocalDate.parse("Jan 20, 2020", fmt),
542766,
151.460,
2.420,
366.46));
this.journal.add(new FuelPurchase(
LocalDate.parse("Jan 21, 2020", fmt),
543088,
92.730,
2.306,
213.80));
this.journal.add(new FuelPurchase(
LocalDate.parse("Jan 23, 2020", fmt),
545317,
161.060,
2.620,
421.99));
this.journal.add(new FuelPurchase(
LocalDate.parse("Jan 25, 2020", fmt),
546525,
127.360,
2.706,
344.66));
this.journal.add(new FuelPurchase(
LocalDate.parse("Jan 29, 2020", fmt),
547184,
168.880,
2.315,
390.87));
/* ********************************************************************
* END OF DEBUGGING CODE: Remove the above before release
build. *
*******************************************************************/
}
private FuelPurchaseManager(Lookup context) {
this();
putValue(Action.NAME, NbBundle.getMessage(FuelPurchaseManager.class,
"LBL_Action"));
this.context = context;
}
void init() {
assert SwingUtilities.isEventDispatchThread()
: "this shall be called just from AWT thread";
if ( lkpInfo != null ) {
return;
}
}
public static FuelPurchaseManager getInstance() {
if ( mgr == null )
mgr = new FuelPurchaseManager();
return mgr;
}
@Override
public boolean isEnabled() {
init();
return super.isEnabled();
}
@Override
public void actionPerformed(ActionEvent e) {
init();
throw new UnsupportedOperationException("`FuelPurchaseManager."
+ "actionPerformed(ActionEvent e)` Not supported yet.");
}
@Override
public void resultChanged(LookupEvent le) {
setEnabled(!lkpInfo.allInstances().isEmpty());
}
@Override
public Action createContextAwareInstance(Lookup lkp) {
return FuelPurchaseManager.getInstance();
}
/* Many other data storage, retrieval, and manipulation methods
below here */
}
Now, since the PostJournalToGL action class is set up as conditional,
shouldn't it enable the menu item whenever there is a change to the data in
the FuelPurchaseManager class?
I have Googled this using every possible set of keywords that I am able to
think up, but to no avail. I cannot seem to find anything that points me in
the correct direction for making this work. Everything that I have found is
dealing with visual elements in the application, mostly using Nodes to
conditionally enable menu items and toolbar buttons.
If you could possibly point me in the correct direction for solving this, I
will be so grateful! However, if this is not possible, I can go with my
only hope (which I hoped would just be temporary), which is creating a
visual journal window for each module that contains a journal of financial
transactions that will need to be posted to the General Ledger.
Thanks for any help that you are able to provide with this issue.
Sincerely,
Sean Carrick
Owner - PekinSOFT Systems
[email protected]
(309) 989-0672
