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

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Attachments:
Queue based UI Event Handler Practice.vi ‏18 KB
NI Slide.png ‏177 KB

Chuan wrote:
Hi, everybody:
I am trying to get a better understanding of the Queue based UI Event Handler pattern in CLD exam. So I made the attached small LabVIEW program in which 3 buttons(State 0, State 1, State 2) are the 'switches' of 3 LED lights (S0, S1, S2), respectively. After comparing with the Queue based UI Event Handler pattern in NI's slide, I got some questions at the following points:
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[2013-01-07T16:29:23.425+00:00] [oim_server1] [ERROR] [IAM-0080075] [oracle.iam.platform.kernel.impl] [tid: [ACTIVE].ExecuteThread: '13' for queue: 'weblogic.kernel.Default (self-tuning)'] [userId: oiminternal] [ecid: 2e903d7ef060ab65:66b2de91:13c15d6d9ce:-8000-0000000000000002,0] [APP: oim#11.1.1.3.0] XML schema validation failed for XML /metadata/iam-features-OIMMigration/EventHandlers.xml and it will not be loaded by kernel.
[2013-01-07T16:29:24.267+00:00] [oim_server1] [ERROR] [IAM-0080075] [oracle.iam.platform.kernel.impl] [tid: [ACTIVE].ExecuteThread: '13' for queue: 'weblogic.kernel.Default (self-tuning)'] [userId: oiminternal] [ecid: 2e903d7ef060ab65:66b2de91:13c15d6d9ce:-8000-0000000000000002,0] [APP: oim#11.1.1.3.0] XML schema validation failed for XML /metadata/iam-features-callbacks/event_configuration/EventHandlers.xml and it will not be loaded by kernel.
Thanks
dty
Edited by: oim_user on Jan 7, 2013 5:37 PM

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Regards
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Attachments:
bug.zip ‏23 KB

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Currently using LV 6.1-LabVIEW 2012, RT8.5
LabVIEW Champion

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a user event occurs? Knowing how that works might give some
clues as to how to pass an object from an AS call.

You would need to use a modified version of the
mx.utils.Delegate package. The link below has just that;
http://www.person13.com/articles/proxy/Proxy.htm

Launch Services event handler

Hi All,
I'm currently trying to develop an application that uses a custom URL very similar to iTunes and itms URL. I've read the documentation on Launch Services and edited by Info.plist as described in the documentation.
All seem to work to an extent. When my application is launched then I click my custom URL example in a text file, the event handler in my applicaton for my custom URL gets called. However when I just click the URL in the text file without first launching my application, my application is launched but the event handler is never called.
Using a set of NSLogs, I notice that the object that should handle the event never gets instantiated where in its -(id)init method I call
[manager setEventHandler:self andSelector:@selector(handleOpenLocationAppleEvent:withReplyEvent:) forEventClass: 'GURL' andEventID:'GURL'];
I must be missing something very basic here but can't seem to figure it out as to why my object is not instantiated and the selector not called for the event.
Any tips or pointers would be appreciated.
Thanks,
rmb
PowerBook G4 FW800 Mac OS X (10.4.4)

Not sure what exactly you are looking but the given below link can help you
http://help.sap.com/saphelp_scm41/helpdata/en/67/b41e3e3986f701e10000000a114084/frameset.htm

Save Event Handler?

Hey scripters! I mostly develop plugins with the C++ sdk, so forgive my ignorance. I was just wondering if it is at all possible (in a script) to make event handler that "listens" for a save event?

I'm not sure how it works using Patch Panels, but if you want to register an event in a Flex panel using the Photoshop Panel SDK ( CSXSLib ) you register the event in the panel
CSXSInterface.instance.evalScript("PhotoshopRegisterEvent", charToInteger("save").toString());
ExternalInterface.addCallback("PhotoshopCallback", PhotoshopCallback);
The 'Per Layer Metadata' sample in the SDK has more info

Howto deregister an event handler

Hi all!
Is there a way to deregister an event handler?! The documentation says so, but I cannot find the appropriate command.
The thing is, that the event handler can change for a subsequent call of my function module. So I'd like to set the event handler each time the function module is called, though the control itself isn't changed.
Thx!

Hi,
You can use the ACTIVATION addition to deregister handler methods or register them dynamically..
Addition
... ACTIVATION f
Effect
The optional ACTIVATION addition allows you to undo existing registrations or register new handlers dynamically using a variable. The argument f in the addition must be a field with type C and length 1. If f contains the value SPACE, the event handler method is deregistered. If f contains the value X, the event handler is registered. You do not need the ACTIVATION addition for static registrations.
Note
If an instance triggers an event, the registration is implicitly deleted if the triggering instance is deleted by the automatic memory management (garbage collection).
The addition ACTIVATION SPACE only allows you to delete those registrations set using ACTIVATION 'X'. A single registration cannot be deleted by means of a mass deregistration using FOR ALL INSTANCES ACTIVATION SPACE. Vice versa, individual triggering instances cannot be excluded from registration after a mass registration. The internal handler tables for single and mass registrations are completely independent of each other.
Example
CLASS C1 DEFINITION.
PUBLIC SECTION.
    EVENTS E.
ENDCLASS.
CLASS C2 DEFINITION.
PUBLIC SECTION.
    METHODS M2 FOR EVENT E OF C1.
ENDCLASS.
DATA: S         TYPE REF TO C1,
      H         TYPE REF TO C2,
      ACTIVE(1) TYPE C VALUE 'X'.
CREATE OBJECT: S, H.
SET HANDLER H->M2 FOR S.
SET HANDLER H->M2 FOR S ACTIVATION SPACE.
SET HANDLER H->M2 FOR S ACTIVATION ACTIVE.
CLASS C2 IMPLEMENTATION.
METHOD M2.
ENDMETHOD.
ENDCLASS.
In this example, the method H->M2 is deregistered and then set dynamically.
Note for all variants:
Note
When you register instance methods as event handlers, note that the registration refers to the current instance and not to the reference variable that is used for registration. Even when the reference variable takes another value after SET HANDLER, the registration of the object remains unchanged. This also affects to the lifetime of objects - an object exists for as long as it is registered as an event handler, even if no more reference variables point to it. The object is either explicitly deregistered using the ACTIVATION addition, or implicitly when the triggering instance no longer exists.
Regards,
Tanveer.
Please mark helpful answers.
Message was edited by: Tanveer Shaikh

Event handler switch creation (for repeated use )

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