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Axelwlt

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About Axelwlt

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LabVIEW Information

  • Version
    LabVIEW 2017
  • Since
    2014

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  1. Hello I excite a system with a sine wave at a fixed frequency and I have the signals of excitation and response. What is the best way to calculate the magnitude and phase of the system at this frequency? (Similarly to a frequency response estimation, but with only one chosen frequency).
  2. Hi I would like to add some more information to the Actor Framework's Message Enqueuer class, so I thought about inheriting from it, with some additional members. However, the issue is that the only way to get the Message Enqueuer of an actor is with Read Self Enqueuer.vi, which returns a Message Enqueuer.lvclass. And I don't find any way to transform this value into my child enqueuer class. Message Enqueuer.lvclass does not have data accessors to let me copy its internal data, and I can't modify Message Enqueuer.lvclass. Is what I would like to achieve impossible?
  3. In theory yes, I use the actor framework, but it would be much easier if my pane resizing mechanism did not use these messages.
  4. Hi My main VI contains a whole bunch of splitters and inserted VIs. These VIs all need to react to Pane Size event of their pane. The event comes as expected when the user resizes the main window. But it does not come when I programatically set the main FP Panel Bounds or Windows Bounds. How can I force the event to come? Programatically moving the splitters 1 pixel and back does the trick, but that's an ugly solution.
  5. That would tell me if the clicked row is opened after the expand/contract mechanism did something, that's not what I need. What I need to know is if the user clicked the symbol in the Mouse Down? (not in the Mouse Down or Mouse Up), before the mecahnism can even run.
  6. Hi, In a Mouse Down? on a tree, I need to know if the user clicked on a expand/contract symbol, because I need to discard clicking on items but I still need the expand/contract mechanism. I would need something similar to the InSymbol from the Point To Row Column method, but for the expand/contract symbol. How can I do that?
  7. I want the Windows system to react to the start and stop of my LabVIEW application. I register the events Win32_ProcessStartTrace and Win32_ProcessStopTrace for my .exe using Register-WMIEvent in Powershell. Only the start event comes, never the stop event. It works correctly with other exes such as notepad.exe, excel.exe, firefox.exe.
  8. That is what I am currently doing but I wanted to speed up a bit this process. How can I do this change? I guess that would be something belonging to VI Scripting?
  9. Hi, Is there a way to make a type def behave as a Strict Type Def during development (so that cosmetic changes made to the .ctl are propagated), and as a Type Def. at runtime (so that the cosmetics can be still be changed with property nodes)? My use case is that the code just needs to colour the controls at runtime, the other property values are decided during development.
  10. I would like with LabVIEW to move an icon to a specific position on the desktop, how can I achieve that?
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