Sizing subvi to designated space on front panel

Hi All,
Rookie LabVIEW programmer here, just starting to get into it.
I'm working on an app that has several states, setup/acquire/display
etc. that I control with a cluster of buttons (ala a training class
example). So I've placed these buttons on one side of my app and have laid
out a display area where I want the subvi's to apear (one for each state).
So my question is, How can I position the subvi to appear in the
location I have designated on my main front panel?
Thanks in advance for the help.
Cheers,
Gregory Cole
[email protected]
"Today's mighty oak is just yesterday's nut that held its ground."

hi... sorry about that
There isn't any password protection but just locked (under vi property)
Here it is.
Ian F
Since LabVIEW 5.1... 7.1.1... 2009, 2010
依恩与LabVIEW
LVVILIB.blogspot.com
Attachments:
poSubvianfk.llb ‏56 KB

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I have 50 bollean rectangular indicators on the front panel. For some reason the sizes of few indicator are slightly different than the others. If I resize them using mouse it oversizes it. Cant think of an intuitive method to achieve this.
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You can also create a 1D or 2D array of indicators in which case they'll be as big and the handling might be easier ... although you cant place them as freely.
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I have built a VI and then I used it as subvi it works but the front panel of subvi didn't diplay for other options

Kindly suggest me possible errors
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Go to the VI Properties, choose Window Appearance. The simple route would be to just use the Dialog setting. But you can play around with the customized settings too.
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Front panel of SubVI locks on 2nd call

HI!
I'm calling a SubVI and pass a Boolean Reference to this SubVI. In the SubVI I'm executing a While loop. The stop condition is the value of the boolean control in the VI that calls the SubVI. (Boolean Refnum + Property Node: VALUE connected to while stop condition)
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I tried what you described, using LV 7.1, and I have no problems running the vi over and over again. See the attached examples. Ref1.vi calls Ref2.vi and passes the Boolean reference to it.
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I know pop-up the front panel of a subVi when called by selecting VI Properties>>Windows apperence.
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How can I call the SubVI like a child window one or more times in the front panel of my main VI ? See the example atached...

I would like to create a aplication where I call dynamically the same SubVi many times in the front panel of my main VI ... I saw this kind of programmation in other languages like Delphi, C++ Builder and Visual Basic.
For explanation: I have 10 channels to read in the list, but I would like to see only 3 channels ... Then I will click in the channels choosed of my list and will open the same SubVI 3 times, where each one will show the individual channel.
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Attachments:
Opening SubVi many times.jpg ‏118 KB

TiTou certainly pointed you down the right path... For a few more details, refer to my post to this thread:
http://forums.ni.com/ni/board/message?board.id=170&message.id=141811
You could use the same technique, except instead of opening the clone's front panel, use the VI reference you have to it to poke it into a subpanel. Please note: I have never actually tried building a VI with more than one subpanel on its front panel, but it should work. Also you will not want to close the VI references because you will need them to stop the clones when you shutdown your application.
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I am trying to have a SubVI called from a Main VI open on a secondary monitor. I am using Remote Panels to control my Main application, which is opened in a web browser on the secondary monitor. I have tried setting the VI Properties - Window Run-Time Position - Monitor to "1" and also tried setting this value programatically using the Front Panel Property Node but neither seems to work. My SubVI still appears on my primary monitor.
I'm using LV 8.6.1 RT and my application is running on a CRIO.
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Mike,
All the SubVI does is prompt the user for some text. The front panel is a simple string control. The SubVI is called from my Main application (not using VI Server) and I have the Window Properties for the SubVI set so that the front panel opens when called, and closes when finshed. The SubVI displays teh fornt panel when called but does not open a new browser window. I have attached the SubVI in case you want ot have a look.
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New Name.vi ‏25 KB

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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
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The problem shows up when trying to close the subVI for the SECOND time. The code is here:
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Its good that you found the bug.
This code may serve as a way for you to compare notes.
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Reading main VI front panel in SubVI

Hi,
I'm trying to create a subVI that writes a header text file containing info on essential parameters in my measurements. My mainVI front panel has a few dozen controls, some of them contained in a handful of clusters.
What I'd want is just to be able to access and read the values at the subVI to construct the string I want to write to the file.
I wouldn't like to proceed the dumb way, i.e., building an array of clusters or individual controls or references to them and passing that to my subVI (and, obviously not passing each individual control/cluster as a subVI input).
I figured I'd like to have some kind of refnum of the mainVI frontpanel passed to my subVI and dig use a big pile of property nodes to dig out the info that i need, inside the SubVI. Is this a feasible solution and if so, what's the way to conduct it? If not, what would be a better way?
As before, I'm using LV7 so in case you answer with block diagram examples, I'd appreciate screenshots of them.
Thanks,
Lauri

Vostokki wrote:
I'm trying to create a subVI that writes a header text file containing info on essential parameters in my measurements. My mainVI front panel has a few dozen controls, some of them contained in a handful of clusters.
What I'd want is just to be able to access and read the values at the subVI to construct the string I want to write to the file.
I wouldn't like to proceed the dumb way, i.e., building an array of clusters or individual controls or references to them and passing that to my subVI (and, obviously not passing each individual control/cluster as a subVI input).
Lauri
Actually that is the preferred way to do. Why you may ask? It is because you decouple the functionality (creating your log file header) from your specific user interface. By doing so you can reuse this VI in other places or applications. By using the references directly this ties the subVI to the calling VI. Unless the subVI is specifically doing something to the UI itself a subVI should avoid accessing data it needs via direct references. It should require the data to be wired in with the appropriate clusters, arrays or whatever your data needs are.
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Conditionally include Front Panel of a Subvi in an EXE

I want to make two versions of an EXE, one "normal" version and a debug version. I know how to set conditional disable symbols via pre/post build actions (btw. NI: these variables should REALLY be defineable per build specification; even bare command line C compilers are easier to use in that regard than Labview).
The "normal" version won't show anything but the main vi. The front panels shouldn't even be included in the exe. For the debug version I want to show the front panels on request (I've queues for sending that to the subvis). Simply calling "FP.open" does not work with an compiled exe, because I get a "resource not found" error (the front panel of the subvi is not compiled into the exe). I tried setting show "frontpanel when called" which forces the FP to be compiled into the exe, but then the FP will shortly flash on the screen, even when the first command of the subvi is hiding the frontpanel.
How can I make a subvi depending on a conditional disable symbol include its front panel into the exe without forcing it to show its frontpanel at the same time?

There are a number of things which cause LV to keep a FP when building. These include things like open when called (which you understandably don't like), but also various things which statically require the front panel. Things like changing the scrollbar settings or creating a property node for a control on the FP. Personally, my preference is for the latter because you can document it better.
If you don't actually mind whether the FP is included, you can just do that and be done with it. If you really do mind, you can check whether placing the property node for the control in a conditional disable structure has an impact on this or not. I have no idea whether it does or not, since I don't know exactly how LV will treat the code in the disabled case.
The other alternative is making two builds and configuring it for each VI:
The disadvantage here is that you have to manage two builds and do this manually for each VI.
If you want, there's a related idea on the idea exchange, but it won't actually help in your case, because it's not conditional:
http://forums.ni.com/t5/LabVIEW-Idea-Exchange/Add-a-property-to-guarantee-that-the-front-panel-of-a-...
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It is possible to open the front panel of a subVI more then one time at the same moment?

I want to open a subvi´s front panel several times with each one operating independently. The subvi has a ring with several variables to choose to show in a graphic. The subvi is called from a button on the Main Front Panel. It is possible to, for instance, open the subvi and set it to show a temperature graphic and click again on the button to call another instance of the same subvi and select pressure for the graphic, keeping both new windows side by side? Will I still be able to access the Main Front Panel?

Yes you can. You have to use a .vit (VI template file). There's an example here. There's also been lot's of discussion on the subject. I think if you do a search for vit, you'll be able to find additional information and examples.

Front Panel Controller SubVI?

Here is the scenario, I have a main VI that uses an event structure to call various other SubVI's depending on what control is pressed and to update the front panel accordingly. The front panel of the Main VI is a Tab Control with ~25 controls total. As you can imagine, some controls should not be enabled until other events happen. For example, I have a menu ring called "Report Type" of which you can choose 'HTML' or 'Send to Printer.' Next to this ring is a boolean control called "Open in Browser?" , I want to only enable this boolean control only when "Report Type" is set to 'HTML.' Likewise I want both the "Report Type" and "Open in Browser?" controls to be disabled if the user has not hit the "Download Data" control to get data from the RT Controller (otherwise there would be nothing to report.)
These are just a few examples of what I need to do, I have been adding 'Disabled' property nodes throughout my event cases but it is becoming very unwieldy and making my block diagram quite cluttered and hard to understand. What I want to do is have a 'Front Panel Controller SubVI' of sorts, of which I define about 10 or so various states the front panel can be in and pass that state to the controller SubVI which in turn disables/enables controlls accordingly. This idea sounds good but so far the implementation seems pretty bad. I was hoping I could just make a cluster of control references and pass that into the SubVI but LabVIEW 8.2 doesn't seem to allow me to wrap up references in a cluster. This has forced me to use VI Server to get the references. What I've been able to come up with using VI Server works, but I can't believe its the most elegant solution. Basically, for each of the possible states, I iterate over all the controls in the front panel and have a case structure for their Label Text which determins if that control should be enabled/disabled for the given state passed in. Also, for some reason it seems that it is not grabbing references to ALL of my controls. There is a menu ring control on the front panel that isn't in the Controls[] array. I should mention that this particular Control already has a reference node created for it that gets passed to a SubVI, perhaps this is why its not found in the Controls[] array, but this doesn't seem to be very intuititve, or documetned for that matter.
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Thats a very good idea, although I'd probably want to put a case structure around the disable property node and have it only change value when the search array function does *not* return -1, otherwise I'll be disabling things I might want to maintain in an enabled state.
Just before I read your post, another thought came to me and that why use a SubVI, I could just use a parallel loop with queues to send back state information. Since queues can be blocking, this would not negate my event structure. I could combine the idea you gave me with this architecture. Thanks

Closing front panel of subvi

I have a main vi that opens many subvi with their front panel (they pop up as a normal windows not like modal). I need to close a subvi by pressing a button on it but I can't find any way.
Thank you everyone,
Massimo Ponte.

You can use vi.lib\UTILITY\VICTL.LLB\Close Panel.vi. Just pass it the name of the VI whose panel you want to close.
Sylke had a similar problem here.

Exporting front panel of subVI to calling VI

Is there a way to "export" the front panel of a subVI so that it becomes part of the (or a pane of) the calling VI? If so, what is it called? I don't know the right language to search for examples of this concept.
My problem is as follows:--
I built a nice, classy interface to a test program that allows the user a great deal of flexibility in controlling the parameters of the device under test and in seeing the impact of those parameters on other parameters. This has about 8-12 control objects, some of which are also wired to act as indicators so that changing one can display on another and vice versa. This interface and its supporting program is big enough that it belongs in its own subVI rather than in the main program. In addition, I built another interface that charts signals from the device under test; this is also big enough that it belongs in its own subVI.
I would like to have the front panels of both of these VIs be part of the front panel of the main program. That is, the front panel of the main program should "inherit" the front panel of each subVI wholesale. If I need to tweak the interface of one of the subVIs -- for example, to add, delete, or replace controls, indicators, displays, charts, etc. -- I would like to be able to do this without having to wrestle with the main VI and the connector pane between it and the subVI.
It seems that LabView should be capable of this, but I cannot find any help, guidance, pointers, etc., in the documentation, textbooks, or examples.
Could someone give me a clue?
Thanks,
Hugh Lauer

So I tried to configure a subpanel, and found it very confusing. It seems that when you put a subpanel control on the front panel, you have to then set up a way to invoke the subVI. Since my subVI has some inputs and outputs on its connector pane, I created a VI reference for it and wired that to the type specifier node of the Open VI Reference node. I then inserted a Call VI by Reference node, so that I could wire up the inputs and outputs of my subVI. Finally, I wired this to the subpanel Invoke Method (Insert VI).
This is different from the examples I found. In those cases, the subVIs had no inputs or outputs on their connector panes, but rather took all of their information from their front panels.
I got different behavior on different attempts to run it. The most common (and most recent) behavior is that the subVI front panel opens up a few seconds after the main VI starts, but it is not quite "in" the subpanel. Instead, it is offset about an inch from both the top and left, as if it were a floating window that I cannot move. Also, it has annoying scroll bars on the bottom and right, which I don't want.
Incidentally, I have two of these subVIs, and I have not yet tried to put the second one into a subpanel.
What I would really like to do is
have both subVIs populate their respective subpanels as soon as the main VI starts, but before any work gets done.
after both subpanels are loaded, run the two subVIs in parallel, one to control the device under test and the other to capture its signals.
have no scrollbars in the subpanel windows.
In fact, what would be the best from a GUI point of view is for the two subpanels to be permanently part of the front panel of the main VI.
Any guidance or insight would be most helpful.
REgards,
Hugh

Sizing subvi to designated space on front panel

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