Tree not update with item deleted

[weitong]

Hi,

I am using Tree control.

Normally, the tree gives out the tags of selected items. However, If I select one item and then delete it, the tree output doesn't change. See attached please. Thanks.

LV2019sp1, win 10

WT

[wiebe@CARYA]

That's a bug alright...

I can confirm this on LV20, 64 bit.

Instructions:

+ Select an item

+ Run VI

+ Notice the value in the array

+ Delete the selected item

+ Run VI

+ Notice the value is still in the array

Is this just an edit time problem? Selecting another item fixes the problem.

If this is a problem during execution, I suppose there are ways around it. We'd need a specific use case though.

[weitong]

Thanks for your comments.

I found a temporary solution by following a property setting “ Reinitial to default”. 

Tree update problem_solution

[billko]

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@weitong wrote:

Thanks for your comments.

I found a temporary solution by following a property setting “ Reinitial to default”. 

Tree update problem_solution

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I think this could help me!

[wiebe@CARYA · Accepted solution]

I'd probably just set the value with a property node.

Maybe even a value (signaling), if there's an event attached to it.

[billko]

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wiebe@CARYA wrote:

I'd probably just set the value with a property node.

Maybe even a value (signaling), if there's an event attached to it.

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I think I actually tried this before and it didn't work right.  But it was very long ago.

[wiebe@CARYA]

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@billko wrote:

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wiebe@CARYA wrote:

I'd probably just set the value with a property node.

Maybe even a value (signaling), if there's an event attached to it.

---

I think I actually tried this before and it didn't work right.  But it was very long ago.

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Works for me in LV20.

[billko]

Maybe I can revisit that software.   It was the first - and last - time I used a tree control and I was disappointed with it, to tell the truth.

[wiebe@CARYA]

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@billko wrote:

Maybe I can revisit that software.   It was the first - and last - time I used a tree control and I was disappointed with it, to tell the truth.

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It's a wild beast to tame.

A tree and a subpanel showing the selected item, and item specific right click menus, can replace very complex alternatives. For some applications, there's really no substitute.

The API isn't exactly intuitive, but I'd almost always wrap things in a class anyway.

Especially custom drag and drop functionality is not as easy as it should be. The moment you catch one drag and drop event, you need to handle all drag and drop events. But this is the same for listboxes.

[billko]

I think I was most disappointed that the names weren't namespaced.  If the same name occurred ANYWHERE in the tree it gives it a new tag name, which complicated the code somewhat.  It wasn't as elegant as I had hoped it would be.  I was hoping to use it to duplicate a CLI command tree.