Set Dynamic Event Scope MANUALLY

Hello,
I am using APEX 4.2.2.
How to Set Dynamic Event Scope manually ? I included the template of Hide/Show Region in a Report ( Each Hide/Show region is a row ) It works fine when end user clicks on the heading of the region. But, If the Report get Refreshed then Hide/Show functionality does not respond any more !!!
What is the solution to enable hide/show after that report is refreshed ?
Regards,

Hello,
Thanks All,
It works but caused another issue.
After the report gets refreshed, if we click on any of the Hide/show regions on the top:
Newsletters or
Preferences or
Expand/Collapse listings
It opens and closes right off the bat ??
I went over this but, I did not manage to do it ...
Can we fix this please.
I followed your instructions:
I created DA to fire after the report gets refreshed to execute JS
> loadHideShowRegions();
Affected element:
The report region.
Regards,

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RT: Dynamic Event possible without polling?

RT Targets only support dynamic events as seen in this demo:
http://digital.ni.com/public.nsf/allkb/42B70D2D0C4B568586256E2F0051441D?OpenDocument
the example uses: "Generate User Event" to fire an event.
The event is fired within an While Loop where two inputs are compared (polling the input all the time....)
I would like to generate an Event on a change of a variable without having to poll.
Is this possible?
thanks a lot
thomas

Hi Thomas,
you can use shared variables and LabVIEW DSC on your RT target without polling but otherwise there's no possibility to avoid polling completely.
Here are some interesting links on this issue:
"Installing LabVIEW DSC, SQL, or MSDE on a Real-Time Target": http://digital.ni.com/public.nsf/allkb/52CC76196A480C6C86256F8900592A25
This page contains also other interesting links on this issue!
http://digital.ni.com/manuals.nsf/websearch/12BCE84BAF96E2AE862574330022EC46
"Using the LabVIEW Shared Variable": http://zone.ni.com/devzone/cda/tut/p/id/4679
"Using Shared Variable Events on Real-Time Targets": http://digital.ni.com/public.nsf/websearch/3AE325EECD9A17AD862570BA00625088?OpenDocument
The DSC features of the shared variable are limited to use on Windows targets, however you can host variables on a Windows machine and reference them on a real-time target. Another option is to create two sets of shared variables, one set hosted on the Windows side and one on the RT side, with each variable on the Windows set bound to the corresponding variable on the RT side. This would allow you for example to log data on a variable, but have it hosted on the RT side with no network dependency on the RT side to the Windows side.
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Best regards
Suse
Certified LabVIEW Developer (CLD)

Dynamic event with global variable (vi)

I have registered a dynamic event to fire when a control in a global vi value changes. All works fine when I open the global vi and change the value of the control manually. When I have another vi modify the value of the global, the dynamic event does not fire.
I have tried leaving the front panel of the global vi open and observed the value being changed...
Any help appreciated...

Hi,
Please refer to the following document that explains why programmatic changes to the global doesn't get detected.
Event Structure Does Not Capture the Value Changed Event...
I hope this helps.
Sincerely,
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National Instruments

Using Dynamic Events in PC based RT Target

Hi!
I have a PC based Real-Time Target. I try use dynamic call of VI on RT target with setting reference to user event. My code for Host:
My code for RT Target:
But when VI has started, on user event no action ocсur. How can I use dynamic events on RT Target?
Attachments:
Host.png ‏35 KB
RT_Target.png ‏51 KB

Silentium wrote:
Also i try use Queue in same manner - set reference to queue, but it's not workin too. So i can use only shared variable or TCP/UDP to transfer data between Host and RT target?
You can alos use VI-Server Invoke node Call by reference.
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Dynamic Event (Notifier) Missed

In my application, I have a notifier registered as a "user event". There are three event structures, each within a while loop; in each event structure this notifier event is registered as "dynamic event". In two structures, the timeout is set to "-1" (infinite). In the third stcructure, the timeout is set to 5 ms; the timeout case takes 500 ms to complete (e.g. using "Wait ms"). An additional event structure fires this notifier event.
What happens is that the two structures with infinite timeout catch this event (I think), but the structure with a short timeout and long-executing timeout case misses it. If I make the timeout long and the timeout case execute fast, this structure also catches the event. It looks like during the execution of the timeout case the event is unregistered.
An example VI is attached.
Is it a bug or am I doing something wrong?
Thanks,
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Message Edited by Cepera on 02-12-2010 10:29 PM
Solved!
Go to Solution.
Attachments:
NotifierTest.vi ‏17 KB

You are right of course. I forgot that events do not broadcast. A corrected VI is attached. It works fine now. Thanks!
Attachments:
NotifierTest2.vi ‏19 KB

Dynamic event registration tutorial

Hi All,
I wanted to learn about the Dynamic Event registration ... i have tried to donwload so many examples and try to undertsand why thery r using this...??
unfortunatly i could not able to find one with a clear description... Can any please give some basic differences and uses between static and dynamic events ...
in some post they use so many property nodes and regsiter events and so on ...
Thanks in advance...
Solved!
Go to Solution.

Can you post that vi? I am unable to drag and drop it because I have LV2010.
tst wrote:
Static events are fully configured at edit time. They're the ones you know.
Dynamic events are also configured at edit time (because the event structure needs specific data types), but you can play with the event source and whether or not you actually get the event the event at run time.
I am still finding it hard to understand. I get the configured part. THat's coz you have to set up the event structure. What I don't understand is how exactly it becomes dynamic? We still add event cases just like static events. My mind is hurting so much thinking about this
I may not be perfect, but I'm all I got!

Dynamic event registration - FP not in memory ?

Hello,
I have problem that I don't understand tith dynamic event registration.
In my app I have many threads that are initialised when app starts and I switch between them using subpanel.
In one of this modules I want to register some dynamic events to find whitch controll in cluster was pressed.
Why I get error 1001?
I have static reference for all modules in main thread. I start modules but I don't open their FP.
Solved!
Go to Solution.
Attachments:
err.png ‏30 KB

Well your image is confusing because you can't run without wiring that reference. But if you did do that then the error comes from the fact that your VI doesn't have a front panel that is open when you register for it. So that control reference doesn't really exists. I mean it exists but you can't reference a control that hasn't been opened.
I think what you'll want to do is open the front panel, but then set it to hidden. Then after the front panel has been opened, and hidden, register for the control event.
Unofficial Forum Rules and Guidelines - Hooovahh - LabVIEW Overlord
If 10 out of 10 experts in any field say something is bad, you should probably take their opinion seriously.

ALTER SYSTEM SET SGA_TARGET = 0 scope=spfile; not working

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Chinar wrote:
user9198889 wrote:
SQL> ALTER SYSTEM SET SGA_TARGET = 0 scope=spfile;
System altered.
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
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Fixed Size 2243280 bytes
Variable Size 1140852016 bytes
Database Buffers 973078528 bytes
Redo Buffers 5083136 bytes
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Database opened.
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NAME TYPE VALUE
lock_sga boolean FALSE
pre_page_sga boolean FALSE
sga_max_size big integer 2032M
sga_target big integer 0
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*.sga_max_size=0
*.sga_target=0
and
instance1.__sga_target=2130706432
instance2.__sga_target=2130706432
tried ALTER SYSTEM SET SGA_TARGET = 0 scope=spfile sid='*'; aswell ...
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Dynamic event keys

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Dynamic events are one of the best features added to LV 7.0 and have saved me a few times. The idea is that you can add events which an event handeler can register for the only thing you have to do it decide on the parameters which define the event. basically you craete a user event, register for the event, pass the event to the dynamic event terimina (right click on the event structure and "show dynamic event terminal" then add the event case just as you do with a native event. In addition you can turn on and off the dynamic events as needed. I will post an example I did later if it would help. Spent the time to learn dynamic events, well worth the effort.
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Hi,
To configure your ODBC DataSource, go to Control Panel ---> DataSources(ODBC) (If you are in a Windows environment).
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How to Change Value set Dynamically for a Parameter in Apps?

Hi All,
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amol

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Set Dynamic Event Scope MANUALLY

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