Menu Design using Event Handler and Containers

I am going to redesign my menu interface using a Labview Event Structure which has many control on tab pages. I want to start out doing the correct design approach here. By registering the front panel controls[] property as an event, I can write event cases for each of the controls on the front panel. However, I run into difficulty when I have controls on tab pages. I have attached a VI which shows how I want to set it up. The event hanlder only fires when I change pages on the tab control.
What is a good way to be able to decipher individual controls on the tab control and
what is the characteristic (label, ref number, etc) that I should be writing the event cases on for good code maintenance?
Solved!
Go to Solution.
Attachments:
Generic Menu.vi ‏14 KB

Looking at your code, you registered for value change events for controls on the front panel, not in the tab control. Use the property node for the tab control to get the references to the pages and for each page get the references for the controls on that page. Build an array of all controls on all pages (or you could separate the registration for each page to make your life easier potentially) and register those controls for value change events. See below...

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Hi all,
If you combine RMI with an event handler and java.awt.Window.dispose(), the JVM hangs. The only way to solve this problem is by disposing of the frame from within SwingUtilities.invokeLater.
Please check the following code:
ServerInterface.java:_
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface ServerInterface extends Remote {
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ClientInterface.java:_
import java.rmi.Remote;
import java.rmi.RemoteException;
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import java.rmi.server.UnicastRemoteObject;
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public Server() throws RemoteException {}
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Client.java:_
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
import java.rmi.Naming;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.SwingUtilities;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JButton;
public class Client extends UnicastRemoteObject implements ClientInterface,ActionListener {
static JFrame A=null;
static ServerInterface ServerSide;
private Client() throws RemoteException {}
public void Send()
if ( A == null )
     A = Display("Remove");                   // display frame
else                                // remove frame
     SwingUtilities.invokeLater ( new Runnable(){public void run(){A.dispose();A=null;}} );
public static void main(String[] args)
try {
      ServerSide = (ServerInterface) Naming.lookup ( "rmi://localhost:1099/Testing" );
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catch ( Throwable t )
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try { ServerSide.Send(new Client()); } catch (Throwable t){System.out.println(t);}
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Thank you for responding to my problem.
unless their documentation says otherwise (eg: repaint). I checked the API for "repaint()", but it didn't mention anything about the EDT. What documentation you are referring to ?
What I don't understand is that why "dispose()" works well on non-RMI systems and hangs the machine on RMI systems ? It even works fine on RMI system providing that you are not disposing of the frame from within an event handler. So the problem occurs only if you are combining the three elements: RMI, event handler, and dispose().
Conversely, you should avoid doing anything that may take a long time on the EDT. Perhaps remote methods fall into that category.It is true that we should avoid doing anything that may take a long time on the EDT; however, in this particular example, dispose() is not done through a remote call, it is done on the client where the frame should be removed.
I also tried disposing of the frame from within a normal Thread (instead of the EDT), and it worked just fine.

Use event handler programmatically

Hello, I use the Labview 8.2.1 and I would like to ask something about event handler.
I have some buttons and I use an event handler to perform their tasks. The buttons are used only with the mouse and not programmatically.
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Thank you in advance.
Solved!
Go to Solution.

Write to the Value(Sgnl) property node of the variable you want to change. This will set off an event programatically.
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Instead of having a task while loop in an event case, put your task while loop in parallel with the loop surrounding the event structure. When the event which should start the task occurs, you can signal the start of the task while loop. You could use local variables of references to start/stop the loop when an event occurs. You could also use notifiers instead of variables to pass signals to start/stop the while loop. In general you should have a while loop for the event structure, and a parallel while loop to do the tasks. The parallel loop is controlled by variables or notifiers which are set in the event cases.
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You have to write your custom class which implements oracle.iam.identity.usermgmt.api.UserNamePolicy. Then you have to register the plugin which will contain the plugin.xml and class file of your custom code.
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According to your description, my understanding is that you want to update multiple items in another list when updated a list item.
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ICal Event Handling And Exchange

Okay. I'm having problems figuring out how iCal in Snow Leopard is handling meeting invitations. When I get a new meeting invite in Mail.app and I double-click on it, it creates an event in iCal. If I open that event, the popup gives me the option to click on "Maybe", "Accept", or "Decline". If I click on "Accept" the event window goes away and iCal comes back up.... but it doesn't appear to save my response. If I click on the event, it still shows me the same button options. This would all be fine... except for the following issue....
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Event handling and jeditor

HI, I am having a problem and tied down just because of this.
I have an action listener code that is executed when button is clicked, and here what i do in that
JeditorPane.setPage(URL url)
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Method2
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regards

API:
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Use event structure and while loop in parallel

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Yes, just place the event structure in a second while loop.
Add a stop button to the other while loop and add an event for the stop button to stop both loops. For a simple example, see my VI posted here:
http://forums.ni.com/ni/board/message?board.id=170&message.id=176367&jump=true
Simply add more event cases as needed.
LabVIEW Champion . Do more with less code and in less time .

Event Handler and Callback Registration - Business Transaction - SAP Library

To add a comment, please log in or register on the top of this page and choose Reply. Please write your comment in English.
You can also go back to the SAP help page.

Hello,
To implement any process for BERP.
1. Tcode BF24 - Create a product. Let's say Z1130.
2. Tcode BF44 - Create new entry with
Process - 00001130, FM - ZTEST_1130, Product - Z1130.
Save Entry.
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How to add event handling for a menu?

hi,
I have created a menu and few mneu items.
for eachmenu itme , i did event handling and it is workign fine.
it was like this
menuItem = new JMenuItem("Exit",KeyEvent.VK_X);
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menu.add(menuItem);
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now int he second menu i don't have any menu item and i want to do the event handling for the menu itself. any ideas how to do it. following is the code for the menu
//Build the second menu.
menu2 = new JMenu("Options");
menu2.setMnemonic(KeyEvent.VK_O);
menuBar.add(menu2);
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You were on the right track. However, selecting a menu is different from selecting a menu item. MenuItem chucks an ActionEvent and Menu will send an ItemEvent.
If you pile all action output to one actionPerformed method then be careful of your assumptions on what the source type will be. If by any chance the Menu has sent an ActinoEvent then your code will have caused a ClassCastException.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
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        frame = new JFrame("MenuTest");
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        menu2.setMnemonic(KeyEvent.VK_O);
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Event handler switch creation (for repeated use )

Im creating a hyperterminal like application which reads from serial port and writes into serial port.
The reading and writing works almost fine..I also wants to create some custom "Key controls" that will send some prestored commands to the serial port.
I currently implemented two commands "ESC" and "FLASH " in the Key controls menu..
I want to send these commands ESC and FLASH each time i click a button in the menu.
I used event handler for it..and put the event handler inside an always running while loop.
But the problem is I can send only these commands only for one time during execution.
Repeated pressing of switches doesnt cause any effects..
Can somebody help please???
Im using labview 6.1. If u modify VIs using higher versions i cant open here..kindly include a jpg screenshot inthat case.
Thanking you.
Stephen.
Attachments:
Serial Port(stable release)1.2.vi ‏113 KB
Init.vi ‏32 KB
Write.vi ‏44 KB

Hi Stephen,
in LV7.1 your events will be executed whenever I press one of the according switches...
Notes:
-Don't make several event structures. Instead make one event structure with several event cases. Read the context help for the event structure!
-I would suggest to set the mechanical action of both switches to "latch when pressed" instead of "switch..." to give a feedback to the user as the switch will be reset after reading it...
-Generally be more styleguide-conform! Use right-click on terminals to create controls/constants to avoid coercion dots (spot the red colored dots in the image?). Make error in/out in the lower left/right of the connector pattern. Avoid block diagrams larger than the screen (or what kind of monitor do you use?).
Edited:
Sorry for weird display. I have to get used to the new image gallery feature of the forum (and will use "image to the left" only on rare conditions). Btw. the preview looks different to the actual post
Message Edited by GerdW on 05-28-2009 06:59 AM
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

Event handler getting fired on all list and libraries

I have created an event handler and add it to a custom content type. Some how this event handler is getting fired on each every list which are there inside a site. Below is my content type declaration with fields and event handler. This content type
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<?xml version="1.0" encoding="utf-8"?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">

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<Assembly>Common.SharePoint.Web, Version=1.0.0.0, Culture=neutral, PublicKeyToken=68d03adf96d84a47</Assembly>
<Class>Common.SharePoint.Web.Handlers.CIBDocumentHandler</Class>
<SequenceNumber>10500</SequenceNumber>
</Receiver>
</spe:Receivers>
</XmlDocument>
</XmlDocuments>
</ContentType>
</Elements>

You need to add the ListTemplateId or ListUrl to the Receiver element,
E.g. If you had a list definition with the template ID 10500, then your event receiver XML would look like this:
<?xml version="1.0" encoding="utf-8"?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
<Receivers ListTemplateId="10500" >
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<Name>CIBDocumentHandlerItemAdding</Name>
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<Assembly>Common.SharePoint.Web, Version=1.0.0.0, Culture=neutral, PublicKeyToken=68d03adf96d84a47</Assembly>
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</Receiver>
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</Elements>
Regards, Matthew
MCPD | MCITP
My Blog
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Menu Design using Event Handler and Containers

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