Is Block Diagram Open

Is there a way to tell if the Block Diagram is open when a VI is started? I have a subVI that is set to modal when open. When trouble-shooting, if I run my application, but forget to disable modal for the subVI it causes the system to lock up.
It would be nice if I could set the property of the VI to not be modal if the block diagram was open.
Any suggestions?
Solved!
Go to Solution.

I would attempt this by doing several things:
1) Go to the VI Properties>Window Appearance and click on the Customize button. From there uncheck the "show front panel when called" box.
2) When the VI starts, read the VI Property "Front Panel Window.State" - this will tell you if the window is already openned (ie if the window is openned the window state will be "standard", "Maximized" or "Minimized"). Note: this is the visibility of the front panel, not the block diagram
3a) If the VI is not already opened, set the "Front Panel Window.Behaviour" property to modal and then open the front panel using the VI Invoke Node of "Front Panel.Open". This is basically mimicking the behaviour you describe right now.
3b) If the VI is already opened, set the behaviour property to default or Floating to allow you to click other windows.
4) When finished, if the VI was not already openned, manually close it using the Front Panel.Close invoke node (if it was already openned, leave it openned)
I've attached a screen shot of this kind of thing. I hope this helps,
Shaun
Attachments:
Reading and Changing Front Panel Behaviour.png ‏39 KB

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vishi anand wrote:
> Like I can have only front panel opened. Reason is when I have bunch of VIs
> open, I get too many windows to manage even while using 2 monitors. It will
> be nice if I can just have the window for block diagram open, if I need the
> front panel while editing, I can use Ctrl+E to open it. I know I can
> minimize but then all LV windows look same on task bar. Would be nice if
> icon of the VI showed up on taskbar buttons of each VI.
>
> vishi

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There are a way to open a block diagram programatically. Exists a undocumented function located in
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First protect you diagram
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DON'T expect answers if you only want perfect one's
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LV since v3.1
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Hi, All
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Thanks,

Could you be a bit more specific on what you are trying to do?
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http://zone.ni.com/devzone/cda/tut/p/id/2994.
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You appear to have done everything right. I doubt that being on the network would be a culprit.
You've probably mapped the drive, right?
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Message Edited by Ray.R on 11-20-2009 10:31 AM
Attachments:
locked.PNG ‏37 KB

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In LV 8.6, when a VI is embedded into a subpanel on another VI, when you right-click on the panel of the embedded VI and select "Open Block Diagram", nothing happens. In LV 8.51 and LV 8.21, using the same code, the procedure opens the block diagram of the embedded VI, as it should. I think it's a bug, but I don't know where else I can report it.
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Regards,
Sergey
Attachments:
SubpanelBugV85.llb ‏37 KB
SubpanelBugV86.llb ‏27 KB

Is Block Diagram Open

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