Open and Close Front Panel of SubVI

Hi all,
Running LabVIEW 2011 on Windows 7 x64. I am trying to get a subVI front panel to open from my main FP with the press of a button and then close with a button press in the subVI. Here is the piece from my main FP that calls the VI and opens the FP
Plots is defined in another loop and all of the loops are in a flat sequence. I did it this way because I want it to start with the first press and not stop my main loop from running. I have moved the item in the left loop around a lot so I'm not sure if I can run that in the same loop as the event or not. Either way opening the VI seems to work fine.
The problem shows up when trying to close the subVI for the SECOND time. The code is here:
As I said, the first time I open and close the VI everything works as I expect it should. I am then able to open it again but now the "blank button" doesn't function and I can't close the window or even open the block diagram to probe anything. I have been trying to figure this out for awhile, any insite would be greatly appreciated!
Thanks
Solved!
Go to Solution.

Its good that you found the bug.
This code may serve as a way for you to compare notes.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

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Open and close front panel

Hi,
I wish to have a VI that works as a main menu from which you start new
VI's depending on your choice. When the new VI start I want the main
menu to hide it's front panel temporarily until it the second VI
returns.
Anyone has a solution to this?
/Nimrod
Sent via Deja.com http://www.deja.com/
Before you buy.

[email protected] wrote:
When the new VI start I want the main menu to hide it's front panel temporarily
until it the second VI returns.
If you are using LabVIEW 5.1, you can use the VI server attributes to hide
the VI by moving it off of the desktop. I will send you a sample in private
mail.
The attribute (property) you need to use is Front Panel Window -> Window
Bounds.
Set it to something that is larger than your window size, like 2000, 2000,
2200, 2200.
I hope that this helps,
Bob Young
Bob Young - Test Engineer - Lapsed Certified LabVIEW Developer
DISTek Integration, Inc. - NI Alliance Member
mailto:[email protected]

Main VI stops fucntioning after i open and close a subvi from an event structrue.

Hi,
I am trying to open a pop up vi from an event. I have been struggling with this for a while now. When i open a pop up vi and close it, the main vi stops running properly.
I have narrowed it down to the fact that the event which calls the subvi never finishes when the subvi is closed.
The attached image is an example of what I am currently doing. When I run this, i never see the dialog box that says 'here'
maybe useful as a hint to the problem...
This does work properly if I run the vi, click to open the subvi, close the subvi, (here the main vi is not working properly, cant click anything) then stop the main vi, run the main vi again, open and close the subvi, and then i see the 'here' dialog, and my main vi functions properly.
thanks
J
Solved!
Go to Solution.

What is actually happening is you hit the Ok button and your panel closes and you set the Stop 2 to True. Ok, that is fine except for the fact that the Stop 2 terminal has already been read during that iteration of the loop. So the loop will go again. This time is has read the Stop 2 at a TRUE, but the event structure needs an event before the loop can complete. But the front panel has been closed already and you are stuck.
As Dennis said, get rid of the Stop 2 and just wire the TRUE constant straight out of the event case. Wire a FALSE for all of the other event cases.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

How to display remote front panels of subvis that are already open

I inherited an RT project that uses remote front panels for nearly all the user interfaces. The host application opens a remote front panel the the top level RT vi, and there are several subvis on the RT system that are opened from that top level vi and thus displayed on the host (i.e. their "Show Front Panel When Called" properties are set TRUE).
If the Host loses its connection to the RT system when any subvi front panels are opened, and the host application is restarted, it can re-open the top level vi remote front panel, but all the RT subvis that are already open will not display their front panels. I am looking for a way to open the front panels to these subvis from the host application.
The kicker is, I need to know which subvis are actually running before I attempt to open remote front panels. Is there any way to determine what subvis are actively running (and not just in memory, such as subvis that won't get executed until the top level vi reaches a certain state)? I am thinking that I could create a list of the subvis that I need access to, check to see if any are actively running on the RT system, and then invoke a remote front panel connection with those that are running.
Does anyone have any ideas as to how I might be able to do so? Or any other suggestions? [and yes, I know that RFP communication is probably not the best way to go, but we're too entrenched in this software to start over with a new system!]

TurboPhil wrote:
If the Host loses its connection to the RT system when any subvi front panels are opened, and the host application is restarted, it can re-open the top level vi remote front panel, but all the RT subvis that are already open will not display their front panels. I am looking for a way to open the front panels to these subvis from the host application.
It might be possible to work around this behavior by placing VI invoke nodes in your top level VI that reference each of your subvis and setting the Wait Until Done invoke method to false. This should cause the subvi to close when the top level VI closes even in the case of an unexpected restart.
You can access this invode node in the functions pallet by selecting Application Control » Invoke Node and also selecting Application Control » Static VI reference. Wire the Static VI Reference to the vi reference input node and double click the Static VI Reference and select the appropriate subvi in the dialog window. Left click on the Method section of the invoke node and select Run VI. Finally right click on the Wait Until Done invoke method and select Create Constant and ensure this constant is set to false.
TurboPhil wrote:
The kicker is, I need to know which subvis are actually running before I attempt to open remote front panels. Is there any way to determine what subvis are actively running (and not just in memory, such as subvis that won't get executed until the top level vi reaches a certain state)? I am thinking that I could create a list of the subvis that I need access to, check to see if any are actively running on the RT system, and then invoke a remote front panel connection with those that are running.
You can access this information by using the Real-Time System Manager (Tools » Real-Time Module » System Manager). This can be used to show what VIs and subvis are loaded into memory and which are running.
For more information on using this tool please referere to this Knowledge Base article.
Message Edited by BLAQmx on 02-18-2008 11:40 AM
Mark
LabVIEW R&D

Since installing LTR 5.4, which I've now upgraded to 5.6, I've encountered repeated slowness and malfunctions in operations, especially when using the Compare View function and the Tab key to open and close the right and left side panels. Such problems n

Since installing LTR 5.4, which I've now upgraded to 5.6, I've encountered repeated slowness and malfunctions in operations, especially when using the Compare View function and the Tab key to open and close the right and left side panels. Such problems never arose during two years of using LTR-4 and nothing else has changed on my computer. I have a pretty simple system with only a few plug-ins, which are usually not in operation. I have 12GB of RAM in my Windows 7 PC. I could illustrate these problems with screen shots if you would tell me how to submit screen shots. Otherwise I will try to describe the problems in words.
The problem is clearly cumulative, growing worse as usage time passes. Compare View feature gradually slows down and eventually seems to choke as my work session proceeds. If I Exit LTR and re-enter and start all over, things will work normally for maybe 30 minutes, but then the Compare View feature begins to become very slow to respond. In a recent example with my screen full of thumbnails in Library mode I highlighted two images to compare. LTR started to open the Compare View screen by first having the top row of thumbnails disappear to be replaced by the "SELECT" and "CANDIDATE" words in their spaces (but no images), but Compare View never succeeded in gaining control of the screen. After some seconds the top row of thumbnails reasserted its position and the Compare View windows disappeared. But LTR kept trying to bring them back. Again the top row of thumbnails would go away, Select and candidate would reappear, try again, and give up. This went on for at least 2-3 minutes before I tried to choose File and Exit, but even that did not initially want to respond. It doesn't like to accept other commands when it's trying to open Compare View. Finally it allowed me to exit.
To experiment I created a new catalog of 1100 images. After 30-40 minutes, the Compare View function began to operate very slowly. With left and right side panels visible and two thumbnails highlighted, hitting Compare View can take half a minute before the two mid-size images open in their respective SELECT and CANDIDATE windows. When the side panels are open and two images are in the Select/Candidate spaces, hitting the Tab button to close the side panels produces a very delayed response--25-30 seconds to close them, a few more seconds to enlarge the two images to full size. To reverse the process (i.e., to recall the two side panels), hitting Tab would make the two sides of the screen go black for up to a minute, with no words visible. Eventually the info fields in the panels would open up.
I also created a new user account and imported a folder of 160 images. After half an hour Compare View began mis-placing data. (I have a screen shot to show this.) CANDIDATE appears on the left side of SELECT, whereas it should be on the right. The accompanying camera exposure data appears almost entirely to the left of the mid-screen dividing line. Although the Candidate and Select headings were transposed, the image exposure data was not, but the data for the image on the right was almost entirely to the left of the line dividing the screen in two.
Gurus in The Lightroom Forum have examined Task Manager data showing Processes running and Performance indicators and they see nothing wrong. I could also send screen shots of this data.
At this point, the only way I can process my images is to work 30-40 minutes and then shut down everything, exit, and re-start LTR. This is not normal. I hope you can find the cause, and then the solution. If you would like to see my screen shots, tell me how to submit them.
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[email protected]

Since installing LTR 5.4, which I've now upgraded to 5.6, I've encountered repeated slowness and malfunctions in operations, especially when using the Compare View function and the Tab key to open and close the right and left side panels. Such problems never arose during two years of using LTR-4 and nothing else has changed on my computer. I have a pretty simple system with only a few plug-ins, which are usually not in operation. I have 12GB of RAM in my Windows 7 PC. I could illustrate these problems with screen shots if you would tell me how to submit screen shots. Otherwise I will try to describe the problems in words.
The problem is clearly cumulative, growing worse as usage time passes. Compare View feature gradually slows down and eventually seems to choke as my work session proceeds. If I Exit LTR and re-enter and start all over, things will work normally for maybe 30 minutes, but then the Compare View feature begins to become very slow to respond. In a recent example with my screen full of thumbnails in Library mode I highlighted two images to compare. LTR started to open the Compare View screen by first having the top row of thumbnails disappear to be replaced by the "SELECT" and "CANDIDATE" words in their spaces (but no images), but Compare View never succeeded in gaining control of the screen. After some seconds the top row of thumbnails reasserted its position and the Compare View windows disappeared. But LTR kept trying to bring them back. Again the top row of thumbnails would go away, Select and candidate would reappear, try again, and give up. This went on for at least 2-3 minutes before I tried to choose File and Exit, but even that did not initially want to respond. It doesn't like to accept other commands when it's trying to open Compare View. Finally it allowed me to exit.
To experiment I created a new catalog of 1100 images. After 30-40 minutes, the Compare View function began to operate very slowly. With left and right side panels visible and two thumbnails highlighted, hitting Compare View can take half a minute before the two mid-size images open in their respective SELECT and CANDIDATE windows. When the side panels are open and two images are in the Select/Candidate spaces, hitting the Tab button to close the side panels produces a very delayed response--25-30 seconds to close them, a few more seconds to enlarge the two images to full size. To reverse the process (i.e., to recall the two side panels), hitting Tab would make the two sides of the screen go black for up to a minute, with no words visible. Eventually the info fields in the panels would open up.
I also created a new user account and imported a folder of 160 images. After half an hour Compare View began mis-placing data. (I have a screen shot to show this.) CANDIDATE appears on the left side of SELECT, whereas it should be on the right. The accompanying camera exposure data appears almost entirely to the left of the mid-screen dividing line. Although the Candidate and Select headings were transposed, the image exposure data was not, but the data for the image on the right was almost entirely to the left of the line dividing the screen in two.
Gurus in The Lightroom Forum have examined Task Manager data showing Processes running and Performance indicators and they see nothing wrong. I could also send screen shots of this data.
At this point, the only way I can process my images is to work 30-40 minutes and then shut down everything, exit, and re-start LTR. This is not normal. I hope you can find the cause, and then the solution. If you would like to see my screen shots, tell me how to submit them.
Ollie
[email protected]

Accordion Panel Widget - open and close speed.

Hello,
Is there any way to change the speed that an Accordion Panel Widget opens and closes?
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<a href="http://tinypic.com" target="_blank"><img src="http://i37.tinypic.com/fjgwtv.gif" border="0" alt="Image and video hosting by TinyPic"></a>

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