Panel size event acts first in dialog VI?

Appearently, the event 'panel size' occurs first when a dialog subvi is called. This will cause issues if a one time timout is used. Can someone please confirm that this is true?
I have attached a caller and subvi to demonstrate. When the dialog is called, the index should show 1, indicating that only one event was executed, but in this case it shows 2.
Attachments:
caller.vi ‏8 KB
subvi_dialog.vi ‏9 KB

Hi Drazen,
Actually, the Pane Size (panel resize) event will occur twice as your sub-vi front panel is opened: first when the resizing begins, and again when the resizing is over (when LabVIEW sees that Old Boundaries and New Boundaries are equal). So, the 2 you see immediately in the indicator on the sub-vi is for both panel resize events. A timeout event when the timeout is set to zero initially never occurs because the VI registers the panel resize event first.
I hope that clarification will help you develop your application!
Product Support Engineer
National Instruments

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As noted in the KB article What Is the Difference Between the Options
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Panel size inconsistency

Hi all.
I am fairly new to making my panels native doc-able panels using Eclipse with Extension Builder. Up till now, I have been creating floating panels just using ScriptUI.
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I have build a panel, that works fine on my InDesign CC 2014, but when a colleague has the same extension installed, he gets strange extra blank panel space.
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Hi Drazen,
Actually, the Pane Size (panel resize) event will occur twice as your sub-vi front panel is opened: first when the resizing begins, and again when the resizing is over (when LabVIEW sees that Old Boundaries and New Boundaries are equal). So, the 2 you see immediately in the indicator on the sub-vi is for both panel resize events. A timeout event when the timeout is set to zero initially never occurs because the VI registers the panel resize event first.
I hope that clarification will help you develop your application!
Product Support Engineer
National Instruments

Panel resize event bug?

I'm having a bit of hassle with a panel resize event.
For reasons best known to me, I have some parallel loops monitoring certain UI behaviour and reacting appropriately.
I have noticved that when a loop which is monitoring the "Panel Resize" event stops, (No dynamic registration) the next panel resize will freeze the VI. It's as if the Event case is not releasing the handle to the "Panel resize" event.
If I handle the "Panel Resize" event via a dynamic registration and subsequent release, everything works fine.
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Attachments:
Freezes.vi ‏22 KB
Doesnt freeze.vi ‏24 KB

tst wrote:
I think this has to do with LabVIEW locking the FP (as configured) even when the event structure should not execute any more. I actually created a simple example of it recently, but saved it in one my projects instead of where I would see it, so I forgot about it. I now dug it up and back saved it to 8.0. You can also simplify this example by removing the value change event and making the key down event lock the UI.
Message Edited by tst on 11-10-2008 02:14 PM
Sorry Yair,
but this is not a bug!, it is explainable behaviour and expected behaviour.
What happens, the front panel is locked on the second edit. (use exectuion high-lighting) The event structure is always listening for events where it is registered for, even if the event case will never execute, on the first edit (key down) the event is triggered and the VI is locked and unlocked. The second edit the event is triggered again and the FP is locked. Because the event structure can't execute the FP stays locked.
Shane's behaviour is truly a bug.
The same behaviour is seen with the 'Pane:size' event. (in 8.6)
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VI Analyzer Front Panel Size and Postion Test fails

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We make a lot of use of the VI Analyser and I have been playing with the configuration settings to try and make it only fail the tests that matter to us and I have one test I do not understand correctly.
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Panel Size and Position—Checks that a front panel
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I would like to apply this test, a simple check developers are not creating huge VI, it sounds simple enough, but I cannot seem to get this test to pass.
I am working with two monitors and this test fails when my VI is on either monitor with the message "This VI's front panel does not reside entirely within the specified bounds (1280 x 1024)" my current screen resolutionis 1280 x 1024, so I assume as long as my VI front panel fits within one screen it should be a pass.
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Solved!
Go to Solution.

Hi Norbert,
Thanks for the prompt reply, my asking the question and your reply has made me play with this a little deeper and I have managed to solve my problem.
In case anyone else has a similar problem here are the details.
When you have two monitors and look at the Windows properites you see one monitor is identified as 1 and the other as 2, thses identities are based on the graphics card and the which monitor is plugged into which ouptput connector. You can then chose which monitor you wish to act as your primary monitor. You would suspect it would not matter once you have selected your primary monitor BUT IT DOES.
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I crawlled under my desk and swapped the monitors cables round so now the set-up is
Left Hand Monitor    - idenity 1 selected to be primary monitor
Right Hand Monitor - identiy 2
Now the VI Analysers Panel Size & Position Tests will pass on the left hand monitor but fail on the right hand monitor, just as would expect.
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I think I got it
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Small_front_panel (1).vi ‏6 KB

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Panel size event acts first in dialog VI?

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