Force a user event

Hi,
In a point of my vi I want to force a user event in order to enter in
an event case in run time. I want to simulate an event over a
multicolumn listbox, for example, Double Click.
How can I do it? Some example?
I am working with Create user event, generate user event and destroy user event but I don't know how it works.
Thanks very much,
ToNi.

tonitpp wrote:
Sorry, the object over I want to force an event is a button and not a multicolumn listbox. It works but.... when I force a Double Click event over that button the user can see how the button is pressed automatically and I don't want the user see it, I would like to do it transparent to the user. I use a value (signaling) property node and I associate to it a true value. Another way to do it?
The event also gets triggered if you wire a FALSE to the Signaling property. It does not matter if the value actually changes, only that the signaling property is written to trigger the event. Try it!
LabVIEW Champion . Do more with less code and in less time .

Similar Messages

Is there a way to force a user to view all of Accordion Widget?

Is there a way to force a user to read, or at least view,
all sections of the Accordion Widget? We want to make sure the learner reads
all of the material before advancing to the next slide. Is there a way to do
this? I have searched all over, but I have been unable to find.

No way. This is a static learning interaction, no event that could be used eventually. Personally I prefer offering reading material that is engaging over looking for a way to push the learner to look (reading doesn't mean he understands or grabs it) at all the stuff. But that is my teacher's past, if student doesn't read your stuff, something is wrong with the stuff, not with the student.
If you have to force, you'll have to find another way than the accordion interaction .

RE: (forte-users) Events in Interface

I know, I've implemented similar structures in other locations as well,
always without problems. I've even recreated the whole interface, building
it completely from dragging and dropping methods and events from the class
to the interface. Then I did a force compile of the whole workspace. It
still doesn't solve the problem. There must be some combination of things
that were different in the other circumstances, but I don't seem to be able
to find it. It's definately not an error in the code. There something wrong
in Forte internally, but I don't know which combination of factors causes
it.
Pascal Rottier
Atos Origin Nederland (BAS/West End User Computing)
Tel. +31 (0)10-2661223
Fax. +31 (0)10-2661199
E-mail: Pascal.Rottiernl.origin-it.com
++++++++++++++++++++++++++++
Philip Morris (Afd. MIS)
Tel. +31 (0)164-295149
Fax. +31 (0)164-294444
E-mail: Rottier.Pascalpmintl.ch
-----Original Message-----
From: Moris_Mihaildis/AUST/CSCcsc.com
[mailto:Moris_Mihaildis/AUST/CSCcsc.com]
Sent: Tuesday, April 03, 2001 5:00 AM
To: Rottier, Pascal
Cc: forte-userslists.xpedior.com
Subject: Re: (forte-users) Events in Interface
FYI. We are using Forte 3.0.J.4 and NT4.0 SP6, and have had no problems
implementing your pattern.
There should be no need for a fix (cast). There is something wrong with
your interface.
Regards,
Moris Mihailidis
Consulting
CSC
Level 4, 570 St. Kilda Road, Melbourne VIC 3004
Ph: 61-3-95364675 Fax: 61-3-95364633 Email: mmihailicsc.com.au
"Rottier, Pascal" <Rottier.Pascalpmintl.ch> on 04/02/2001 09:52:46 PM
To: "'Forte Users'" <forte-userslists.xpedior.com>
cc:
Subject: (forte-users) Events in Interface
We have the following scenario:
There is a Service Object that acts as a Facade (Facade pattern) for 3
manager classes that implement some business functions. Each of these three
managers are stored as private attributes on this Service Object.
For the sake of flexibility, these three private attributes are defined by
their Interface, not their class. When the Service Object opens an Event
Loop and registers for the events of one of these interfaces, the whole
partition crashes. Even when using the running man in the development
workshop, the whole partition crashes. The only way to fix that is to cast
the Interface to a class that implements the interface before registering
for the event.
I know it's possible to register for events using an Interface that
contains
these events, rather then a class that implements the events. Of course, at
runtime you do need a real instance of a class that implements the
interface, otherwise you get a NIL-exception.
Does anyone have any experience registering for events from Interfaces? Are
there unexpected circumstances where it should work semantically, but still
causes Forte to crash. We're using Forte 3.j.1 on NT 4.0 SP 6.
Any help is appreciated.
Pascal Rottier
Atos Origin Nederland (BAS/West End User Computing)
Tel. +31 (0)10-2661223
Fax. +31 (0)10-2661199
E-mail: Pascal.Rottiernl.origin-it.com
++++++++++++++++++++++++++++
Philip Morris (Afd. MIS)
Tel. +31 (0)164-295149
Fax. +31 (0)164-294444
E-mail: Rottier.Pascalpmintl.ch
For the archives, go to: http://lists.xpedior.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: forte-users-requestlists.xpedior.com

I know, I've implemented similar structures in other locations as well,
always without problems. I've even recreated the whole interface, building
it completely from dragging and dropping methods and events from the class
to the interface. Then I did a force compile of the whole workspace. It
still doesn't solve the problem. There must be some combination of things
that were different in the other circumstances, but I don't seem to be able
to find it. It's definately not an error in the code. There something wrong
in Forte internally, but I don't know which combination of factors causes
it.
Pascal Rottier
Atos Origin Nederland (BAS/West End User Computing)
Tel. +31 (0)10-2661223
Fax. +31 (0)10-2661199
E-mail: Pascal.Rottiernl.origin-it.com
++++++++++++++++++++++++++++
Philip Morris (Afd. MIS)
Tel. +31 (0)164-295149
Fax. +31 (0)164-294444
E-mail: Rottier.Pascalpmintl.ch
-----Original Message-----
From: Moris_Mihaildis/AUST/CSCcsc.com
[mailto:Moris_Mihaildis/AUST/CSCcsc.com]
Sent: Tuesday, April 03, 2001 5:00 AM
To: Rottier, Pascal
Cc: forte-userslists.xpedior.com
Subject: Re: (forte-users) Events in Interface
FYI. We are using Forte 3.0.J.4 and NT4.0 SP6, and have had no problems
implementing your pattern.
There should be no need for a fix (cast). There is something wrong with
your interface.
Regards,
Moris Mihailidis
Consulting
CSC
Level 4, 570 St. Kilda Road, Melbourne VIC 3004
Ph: 61-3-95364675 Fax: 61-3-95364633 Email: mmihailicsc.com.au
"Rottier, Pascal" <Rottier.Pascalpmintl.ch> on 04/02/2001 09:52:46 PM
To: "'Forte Users'" <forte-userslists.xpedior.com>
cc:
Subject: (forte-users) Events in Interface
We have the following scenario:
There is a Service Object that acts as a Facade (Facade pattern) for 3
manager classes that implement some business functions. Each of these three
managers are stored as private attributes on this Service Object.
For the sake of flexibility, these three private attributes are defined by
their Interface, not their class. When the Service Object opens an Event
Loop and registers for the events of one of these interfaces, the whole
partition crashes. Even when using the running man in the development
workshop, the whole partition crashes. The only way to fix that is to cast
the Interface to a class that implements the interface before registering
for the event.
I know it's possible to register for events using an Interface that
contains
these events, rather then a class that implements the events. Of course, at
runtime you do need a real instance of a class that implements the
interface, otherwise you get a NIL-exception.
Does anyone have any experience registering for events from Interfaces? Are
there unexpected circumstances where it should work semantically, but still
causes Forte to crash. We're using Forte 3.j.1 on NT 4.0 SP 6.
Any help is appreciated.
Pascal Rottier
Atos Origin Nederland (BAS/West End User Computing)
Tel. +31 (0)10-2661223
Fax. +31 (0)10-2661199
E-mail: Pascal.Rottiernl.origin-it.com
++++++++++++++++++++++++++++
Philip Morris (Afd. MIS)
Tel. +31 (0)164-295149
Fax. +31 (0)164-294444
E-mail: Rottier.Pascalpmintl.ch
For the archives, go to: http://lists.xpedior.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: forte-users-requestlists.xpedior.com

Forcing the user to save before submit.

Hi,
I need to force the user to save the form before submit.
How can I do that ? Please help.

Hi,
You can use the dirty flag. If your users have Acrobat/Reader 9.1 or above then you could also use the cancelAction method (however this is a bit flaky in I think version 10.0).
For example, in the button's preSubmit event:
if (event.target.dirty == true) {
xfa.event.cancelAction = true;
You would also want to include a beep and/or messageBox warning to the user.
Hope that helps,
Niall

LV 7.0 extremly unstable while working with user events during edit time

hi
i create and register several user events inside an initializing vi and then pass the registered events to the event structure using dynamic events in my top level vi. all works fine untill i do some changes to the registered events, e.g. changing names, datatypes or add/remove some events. when doing so my LV 7.0 chrases after opening the top level vi (exception error, no *.cpp errors). all changes i made are going to nowhere. i understand that after the changes i made the registered events in my init.vi-indicator dosn't match the events in my event structure, but i can't understand that LV chrashes.
here are my questions:
1. is it a known problem to LV 7.0?
2. should i reinstall LV 7.0
(i have LV 6.x and 7.0 on my machine)?
3. is there a fix?
thanks in advance
greetings
chris
Best regards
chris
CL(A)Dly bending G-Force with LabVIEW
famous last words: "oh my god, it is full of stars!"

Hello Chris,
I have been looking into your problem and have come across one possible known bug in LV 6.1 that may be showing itself in 7.0. If modifications are made to the typedef of a registered event the vi will crash. I was hoping that you could post a small piece of your code and instructions on how to reproduce the crash. This way I can see if this is the same bug, a programming error, or an installation error. I can then determine if there is still a bug that needs to be looked into by our research team.
Thanks,
Caroline
National Instruments
Thanks,
Caroline Tipton
Data Management Product Manager
National Instruments

How to use "User Events" in different parts of an application

Hi,
"You programmatically can create and name your own events, called user events, to carry user-defined data. Like queues and notifiers, user events allow different parts of an application to communicate asynchronously. You can handle both user interface and programmatically generated user events in the same Event structure."
What you read was part of labview 7.1 user manual ( Chapter 9 - pg.12 ). I've some problems with the underlined sentence. I hope someone can help me.
When using Queues, the programmer may use a named queue everywhere in the application. there is no need to wire queue reference among VIs or using global variables to store queue reference. the name of the queue will be all that you need. I wonder if it is also possible with a event refnum that is the output of "Register for Event" node. As far as I've tested. the answer is Negative! I tried to copy-paste refnum in front panels and using the same name. but there is no connection between event refnums.
LV User manual claims that user events can be used like queues, but it doesn't seem so.
Does anybody have an idea?
Best Regards.

I didn't look at Damien Gray's presentation recently, but if I remember it correctly, it is on a much higher level than what I meant, because it refers to LARGE application. This is a very simple one.
Using a functional global is not problematic CPU-wise, nor memory wise (unless you get into really big data structures, like hundreds of MBs), so you shouldn't be afraid to use it. I'm also not sure why you're afraid of the loop. The loop is only there to "hold" the USR. It only runs once. If you want, you can replace it with a for loop that runs once. I've recently learned that apparently, you can also get rid of the loop and use a local variable (look at the example called XY chart) instead of a USR. I don't think a local variable should have any more impact than a USR, but that needs to be tested. It can definitely be more convenient for some VIs where you don't have to wire the SR through the entire VI.
Anyway, you will need to have an "obtain ref" VI which will hold a 1D array of names and a corresponding array of refs. Then, you search the array for the name, and if it finds the name, it extracts the correct reference. You will also need a way to input references and names into the array and possibly a way to empty the array. You may need to have 2 levels - the inner VI will be the LV2 VI and the parent will be the obtain ref\fill array\close VI. You will need some error handling as well - what happens if you search for a name and it can't be found and so on...
Hope this helps.
Try to take over the world!

How to Trigger SY-UCOMM User Event in ALV

Hi Folks,
Currently I have a classic ALV report where I need to remove all the standard ALV buttons and replace it with one custom button. Given that, there is a parameter in REUSE_ALV_GRID_DISPLAY that deals with the user command event. But during the debug/execution of the custom button, the value of sy-ucomm(R_UCOMM in my example below), is always blank.
Moreover, I did some relevant search here in SDN also before I paste my F1 here. If you're going to take a look at my code below, it's exactly the same as what the other relevant topic in user event in ALV.
PERFORM pf_status_kanban USING rt_extab.
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
    EXPORTING
      i_callback_program       = w_repid
      i_callback_top_of_page   = 'F_TOPOF_PAGE'
      i_callback_pf_status_set = 'PF_STATUS_KANBAN' "Exclude ALV standard buttons
      i_callback_user_command = 'F_USER_COMMAND'     "Subroutine for SY-UCOMM
*      i_callback_top_of_page   = 'TOP_OF_PAGE'
      is_layout                = t_alv_layout
      it_fieldcat              = t_alv_fcat[]
      it_sort                  = t_alv_sort
      is_variant               = t_gs_variant
      it_events                = t_events            "Events for AT USER-COMMAND
*      IT_EVENT_EXIT            = 'AT USER-COMMAND'
    TABLES
      t_outtab                 = t_output.
FORM F_USER_COMMAND USING    p_r_ucomm   LIKE sy-ucomm
                              rs_selfield TYPE slis_selfield.
CASE r_ucomm.
    WHEN 'DOWNLOAD'.
      PERFORM f_generate_col USING t_output.
    WHEN OTHERS.
ENDCASE.
ENDFORM.                    " F_USER_COMMAND
FORM F_USER_COMMAND USING    p_r_ucomm   LIKE sy-ucomm
                              rs_selfield TYPE slis_selfield.
CASE r_ucomm.
*    WHEN 'EXCEL'.
*      PERFORM f_generate_col USING t_output.
    WHEN 'DOWNLOAD'.
      PERFORM f_generate_col USING t_output.
    WHEN OTHERS.
ENDCASE.
ENDFORM.                    " F_USER_COMMAND
Thanks and regards,
Jaime

Hi Martin,
Yes, I ensure that the function code in my custom button is exactly the same as the condition for the sy-ucomm.
The call routine for the PF_STATUS_KANBAN is just a test since it seems like Iu2019m chasing a phantom issue here.
Yes, w_repid is set correctly.
DATA:
w_repid LIKE sy-repid.                                              "Report ID.
INITIALIZATION.
w_repid = sy-repid.
It seems like the documentation im reading
Parameter R_UCOMM contains the function code triggered. is not happening as expected...
Thanks.
Jaime
Edited by: Jaime Cabanban on May 7, 2009 10:16 AM

User Events Generation - TicTacToe

Hey everybody,
In order to get a better understanding of how the event structures are used, I have been playing around with making a tic tac toe game (ironically, i did not know that was a coding challenge until I just started this thread).
Anyways, the way I'm doing it is by dynamically registering a mouse move event during mouse down on a boolean control (your game 'marker'). Then when the control is moved overtop of an activex container the boolean lights up. Right now, however, it only works for one of the game pieces ('Dot 8').
My question is this, can someone please show me how to create a user event? I want to create an event where when any boolean control's position is within the bounds of the activex containers it will light up. I could do this manually with a whole lot of logic (you'll get the idea if you check out the code) but that is rediculous and wouldn't help my learning exercise at all.
Thanks so much for the help!
Jonathan
(Code is attached)
Attachments:
events.vi ‏107 KB

If you want to look at the code of my interface posted HERE, See attached (LabVIEW 7.1). It uses simple mouse-down events on the array indicator to determine where to place the correct piece.
Enjoy!
(Disclaimer: The code is not fully tested and documented. There could be bugs There is also room for improvements)
LabVIEW Champion . Do more with less code and in less time .
Attachments:
TTT-Trainer3.zip ‏2139 KB

Event Handler/Create User Event bug

This is a problem I've run into a few times on my system (Win2k) so I finally went back and reproduced it step by step since it wasn't too hard. It causes LabVIEW to crash and exit without saving.
- Create an Event Handler
- Place 'Register Events', wire output to dynamic event terminal
- Place 'Create User Event', wire output to 'Register Events'/User Event
- Place an Empty String Constant [""], wire to input of 'Create User Event'
- Set empty string property -> Visible Items > Label = True
- Rename label from "Empty String Constant" to other such as "Event"
OR
- Create a cluster constant with something in it
OR
- Place a boolean constant
- Set boolean property -> Visible Items > Label = True
- Name label something su
ch as "Event"
- 'Add Event Case...' to the Event Handler, select Dynamic / : User Event
- Delete the constant wired to 'Create User Event'.
- Place a constant of a different data type and wire it to the input of 'Create User Event'
LabVIEW immediately disappears (all changes are lost) and this error is displayed:
================================
LabVIEW.exe has generated errors and will be closed by
Windows. You wlil need to restart the program.
An error log is being created.
================================
If there is a more appropriate place to post things of this nature that don’t really add to the discussion group, but need to be brought to the attention of NI, please post a URL or submittal method. Thanks...

Thanks for the detailed request. We are aware of this exact issue, and the problem was actually fixed for LabVIEW 7.0 for Mac/Unix. Unfortunately, it did not get fixed for the initial release of LabVIEW 7.0 for Windows, but we have plans to include the fix in the first LabVIEW patch for 7.0.
Also, the Discussion Forum is great for notifications of this kind. For future reference, you also have the options of emailing NI engineers directly, or calling us with suspected bug fixes, if you would like more direct communication.
Thanks again, and have a great day!
Liz Fausak
Applications Engineer
National Instruments
www.ni.com/support

Jobs are going to released state after the PC triggers with user event.

HI BI experts,
We are facing issue with event scheduler using user event in the process chains. Some Jobs are not starting immediately with the event and reaching release state. These released jobs are never starts in near future. Also cannot start manually due to event periodic jobs.
No log is availble in SM61 due to settings.
Please let me know your suggestions and this issue.
Regards,
Mohan.

HI BI experts,
We are facing issue with event scheduler using user event in the process chains. Some Jobs are not starting immediately with the event and reaching release state. These released jobs are never starts in near future. Also cannot start manually due to event periodic jobs.
No log is availble in SM61 due to settings.
Please let me know your suggestions and this issue.
Regards,
Mohan.

Responding to two user events with same name

LV 2013, Win 7, & LVRT 2013, PharLap OS
I have a situation where I create an ARRAY of User Events, one for each "domain" .
A "domain" is an area of DAQ: there is a SCXI domain, a CDAQ domain, an EtherCAT domain, several domains dealing with TCP instruments etc., about 25 domains all told. The name of the event is "New Channels This Domain".
When a new configuration comes to the PXI from the host, I sort out the channels by their domain and generate a user event for whichever domains have channels that have changed: more channels, fewer channels, differences. If a domain has no channels that have changed, I do not generate an event for it.
There is a handler for each domain: in that handler, I pick out the event for this domain from the array, and register to receive it. I have an event structure that responds to the NEW CHANNELS THIS DOMAIN event. Since it is an array, then no matter which domain I select, the name of the array is "New Channels This Domain".
All this works fine.
Now I have a situation where it makes sense to have one handler for TWO domains.
I can pick out TWO elements of the array just fine, and register them both. (See attached pic) But now, in the EDIT EVENTS FOR THIS CASE list, I have TWO events called "New Channels This Domain". I can select one for one case, and the other for the other case and it seems to work.
--- Is there any heartache ahead with this scheme?
--- If I change the events in the clusters before, is it going to confuse LabVIEW?
--- Is there something I can do to change the name of the event after I pick it out of the array?
--- Is there something I SHOULD do at that point?
Like I said, it seems to work, but I'm leery of it staying that way - I've had event structures disturbed before (LV2010) when changing cluster order.
Steve Bird
Culverson Software - Elegant software that is a pleasure to use.
Culverson.com
Blog for (mostly LabVIEW) programmers: Tips And Tricks

CoastalMaineBird wrote:
Thanks, Greg for that link. I gave kudos to the idea of the COERCE TO TYPE function, and it seems like it would do the trick, but as of LV2014 it's still not on the palette.
My question still remains: is it necessary? Will the event structure remember that it's supposed to use the SECOND event named "X", through all edits and recompiles? My guess is no, but I'll listen to alternative stories.
I've been using the Coerce to type for this and enums in versions 2011 through 2014 since learning about it. I've seen no issue using it in these cases. I'm guessing it doesn't behave in an expected way for extreame uses which is why NI doesn't release it yet.
As for would it always know to go to the second event if they are named the same? My guess is yes. They maybe named the same but they have different references. I would think it would be just like having two controls with the same label. You should never do this, but if you did, and made a local variables on one and wrote to it, it would always write to the correct control. It would never write to the different control with the same name. Now even if this is the case it could be confusing to a developer looking at the code, which is why I strongly suggest having unique names. But if you don't I suspect every thing would work fine, just have a bold comment or something explaining what each case actually is handling.
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.

How to force the user to enter a value in the prompt

Is there a way to force the user to enter a value in the prompt before they run the report?
We have a customer specific dashbaord. The user has to enter a customer number in Dashbaord prompt on a first page of the dashboard. We store that value in a presentation variable. That presenatation variable value is being referenced in all the other pages of the dashabord. If the user does not enter a values in the first page and directly navigates to the other pages on the dashbaord, the reports on the other pages start to run for all the customers. Is there a way to force the customer to enter a value in the prompt before running any of the reports on the dashboard?
Thanks!

by Answer prompts, do you mean Column prompt?
I can not use Column prompt in this senario as the user should not have to enter the same customer number over and over again when he navigates from one page to another on the same dashboards. If there is a way to default the column prompts then this would be an acceptable solution.
I have already defaulted the prompt to a value as suggested in hte blog, but the issues occurs when the user erases the defaulted value. Is there are way to set the default value within the report?
Can you please explaing mroe about option 3 regarding Java Script. Also please let me know what other options there are so that I can check whether they will fit my needs.
Thank you very much!

Forcing the user to select one of the OBIEE prompts?

Hi All,
Iam new to OBIEE I have a requirment in which I need to force the user to select one of the selection from prompts in OBIEE eg: you need to select one of the contry either India or America to get the other prompts enable and filter the report?
Any help is highly appriciated.

Hi,
You can set a default value in your first dashboard prompt like 'please select a country' then if the user doesn't select something no result will be returned until he selects a valid value
Then make the other dashboard prompts constrained.
Regards
Adil

Forcing end user to open the child form in the resource request dataset

Hi,
Is there any way where we can force end user to open the child form of a resource request dataset and enter the values for the attributes in the child form. The child form attribute is mandatory. However, currently, OIM allows user to submit the request without opening the child form and to enter values for child form attributes(which is mandatory).
Thanks.

Child dataset attributes are set to required="true". But it will come into picture only if end user opens the child form. If he forgets to open the child form, still he is able to submit request without entering values to the attibutes(whose required=true) in the child form. OIM is alowing to submit request if he doesn't open the child form.
I hope i was able to put it in corrrect way.
Thanks.

Forcing a user's password to be expired

I am trying to test my customized change password page. I have updated the URL in the LS_CONFIGURATION table. How can I force a user to produce the change password page so I can test my customized change password page?

Also, is there a way to force the user's password to expire upon first successful login and likely force the user to change the pre-assigned password? This is a requirement on the customer's wishlist.
Chris, please let us all know if you get an anwer to your question. I can't be the only person who'd be interested.
Mike

Force a user event

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