LabVIEW tree control

How to capture right click event on LabVIEW tree control? Thanks.

Here is an example. You cannot get the right click itself--you get a mouse down and see if the right button was clicked.
Attachments:
Untitled.vi ‏25 KB

Similar Messages

  • Save Labview tree Control to file and Load from file

    I want to save all of the information from my Labview (8.2) tree control to a file and be able to read it back from a file and re-populate the tree control.  I am using different symbols as well as multiple columns and level of children in my control.  Does anyone have any suggestions on how to do this?
    Thanks
    Steve M.
    Attachments:
    tree pic.jpg ‏60 KB

    Hi Steve,
    I found a DF that talks about saving the tree to a spreadsheet file and have included it in this message.  To get items from the tree control, you have to use open up the tree and remove all of the items off of that tree, while still preserving the heirarchy of the tree.  The indent level property node will preserve the heirarchy of the tree and from there you can get the item tag and cell string. 
    To transfer the file to a tree, you will then need to read the file and insert items into the tree corresponding to the heirarchy.  I have also found a tutorial on how to traverse tree controls.
    I hope this helps.
    Regards,
    Nadim
    Applications Engineering
    National Instruments

  • Example: Universal Probe - LabVIEW Data to Tree Control

    The Universal Probe is a Custom Probe that can view any data, by populating a LabVIEW Tree control with the data. Its input type is a Variant, and it dynamically parses the data. The the "Using the Universal Probe" section, below, on how to use the Universal Probe to probe anything and everything.
    For a download and more info visit the Universal Probe page at OpenG.org

    This is one way of doing it. Basically start from the parent and for each parent add its children to a queue. Then go over all of them until the queue is empty. There's some cleanup to do, but it shows the basic concept.
    Try to take over the world!
    Attachments:
    tree_v2.vit ‏22 KB

  • LabVIEW 8.6 Tree Control Run-time Shortcut Menu in Executable

    Has anybody else noticed that the options Open/Close All Items have disappeared from the shortcut runtime menu of a tree control when the application is built? I recently upgraded from 8.5 and those two options have disappeared from all of the tree controls in my application.  I tried customizing the menu and adding the options to the menu.  Now they appear but on some controls they are disabled and on the others where they don't appear disabled, they simply don't work. Everything works great in the development environment.
    I built an executable of one of the LabVIEW tree control examples and the same thing happens. Is this a bug that has already been reported somewhere?
    Thanks,
    Erin
    Attachments:
    TestTree.zip ‏79 KB

    Dear Erin,
    I have been able to reproduce the issues you are reporting. I have opened a Corrective Action Request so our R&D Engineers can fix this issue in future versions of LabView. Thank you very much for your feedback. It will be of great help to enhance National Instruments products.
    Greetings,
    David
    National Instruments
    Message Edited by Support on 01-29-2009 11:54 AM

  • Transfer tree control to subprogram as XML

    I've been pretty happy with the labview tree control except that there doensn't seem to be a method for transferring a complete tree from one vi to another. I finally wrote some functions for converting a tree to/from an xml string. To convert to xml, pass the tree refnum to the subvi and out comes xml. To convert back to a new tree, pass a refnum for a new tree and the xml string. I haven't done any optimization for speed or flexibility, (no documentation yet either) but it works pretty well. The attached code has everything you need - I hope someone else will find this useful. I'd love feedback if anyone tries it.
    thanks,
    George
    Attachments:
    tree-xml.zip ‏86 KB

    Hi, George,
    thank you for your answer. I use LabView tree and work with LabView 2013, maybe the tree itself is not uptodate, but after casting it works, I suppose, that it is just the XML string which you expect to get. I made an XML -display VI using LabView tools from the corresponding library - they are going from node to node getting names and attributes. As a result a tree with 2 columns is displayed. I can send you this VI to have a look at it.
    I found and loaded TestConfiguration.xml, it can be also displayed with my VI, though it uses XSD - my original file doesn't have any XSD, that#s why it may be differen in your solution and in what I have to do.
    I took my tree, "casted" it to your ref and than used "LoadXML" from the XML palett of LabView. I got the parsing error "Line 2, Column 2,  Message: Expected an element name", maybe that means, that some header info is not correct.
    As I see from you VI you convert the tree to an XML- string, and then you can save this string in a file, right? I thought of creating an XML -structure with nodes and attributes just from the tree, but obviously it is a very complicated way, isn't it? My problem is to save changes, which a user has done editing the Tree - it seems to be the simplest way to write donw the TREE  completely in an XML file, because the tree has all the info.  But maybe this way can#t be gone at all :-(.
    Please find attached the VI to display an XML file in a tree with 2 columns. I used this display form as an XML Notepad 2007 does it.
    Thanks
    Attachments:
    DisplayXMLFileAsTreeExample.vi ‏49 KB
    DisplayXML.lvproj ‏3 KB

  • Drop through right click on LabVIEW Tree

    I have a LabVIEW Tree control on my front panel and I would like to allow the user to select an item on the tree with a right click. I believe it's called right click drop through, but I can't find any information on it. Is it possible to do this?
    Jim Haas
    Solved!
    Go to Solution.

    One way to do this would be to use the Tree:Mouse Down? filter event case.  Wire a '1' constant to the Button Output Data Node and all clicks will be treated as a left-click.

  • How to use the drop event of the tree control in LabVIEW 8.20?

    Hi,
                I am using the two tree controls in my application to provide a option for the user to drag and drop item from one tree to the other.  I have to validate the user selection. I tried to capture the user drop event  using the event structure. The problem I am facing is, I am not able to drop the item even though i have wired a constant true to the filter(Accepted?) in the event case. I have enable the property(Allow droping) in the right menu of the tree control also.
              While configuring an event case for (drop, drag entered and some thing like this) only I am getting the problem otherwise it is working fine.  
    What do i need to do to caprture the drop event ?
    Is there any way to avoid the item duplication while droping a new item in the tree control ?
    or how can i do this?
    Thanks,
    Pandiarajan R

    Hi Pandiarajan,
    I hope you are doing well today! There is a lengthy discussion on the Tree Control Drag & Drop feature at this forums post including contributions from the developer of the Drag & Drop feature:
    Tree Control Drag & Drop in LabVIEW 8
    By avoiding item duplication, do you mean that you don't want the same item to be in the old tree control or do you not want more than one item in the new tree control?
    Adnan Zafar
    Certified LabVIEW Architect
    Coleman Technologies

  • How can I drag and drop an item from one Tree control to another in LabVIEW 7.1?

    You can use the mouse up and down event on the two tree controls but the problem is making the correct selection in the second tree control. I want to be able to switch over to the selection bar of the second tree control so that I can place my item in the correct position. I know all possible workarounds with double-clicks and so on... but I really want a windows drag and drop.
    This is what I have for the moment. Please check the library below. I need to activate the selection bar of the second tree control somehow to get the position in the control. The VI below is written in LV 7.1
    Attachments:
    Drag&Drop.llb ‏65 KB

    Hi Jones,
    As far as I know this feature is currently not supported by the Tree control. A workaround, would be to use the vertical position of the mouse in the button up event to determine what line you�re dropping the item.
    If you would like the Tree control to include the drag and drop feature, please submit this as a Product Suggestion under the feedback at www.ni.com/contact.
    Good luck!
    Best regards,
    Philip C.
    Applications Engineer
    National Instruments
    www.ni.com/ask
    - Philip Courtois, Thinkbot Solutions

  • LabVIEW 7 Tree Control - Selected Item

    Hi,
    Has anyone tried the new Tree control in LV7 yet? I can't seem to find a method to programatically determine what item in the tree has been selected by the user other than if the user has double clicked on the tree - can someone point me to the method? From a user interface perspective double clicking an item in a tree shouldn't be the only way to select an item and as a side effect double clicking on the LV7 tree item closes a branch if there are children under the node double clicked on, which is very undesirable when only selecting an item.
    Cheers,
    Wayne

    WPS,
    The tree control's data, which is available from its terminal, is the tag(s) of the selected item(s).
    -Jim

  • How to get all items under a parent item in a tree control

    Hello,
    I have 2 questions regarding a tree control:
    1) Is there any way to specify a parent item tag and get an array of ALL its sub item tags? For example, in the attached vi, specify the Parent#2 parent tag and get an array containing Item#P21 and Item#P22
    2) Is there a way to specify a range to the ActiveCell property. For example, all items from line#1 to line number#3
    Any ideas?
    Attachments:
    Tree example.vi ‏6 KB

    Mentos wrote:
    1) Is there any way to specify a parent item tag and get an array of ALL its sub item tags? For example, in the attached vi, specify the Parent#2 parent tag and get an array containing Item#P21 and Item#P22
     Did you try a search? There's no direct way of doing this. You have to navigate the tree and build up an array. You can find an example here: http://forums.ni.com/t5/LabVIEW/get-all-children-o​f-a-parent-in-tree/td-p/729548
    2) Is there a way to specify a range to the ActiveCell property. For example, all items from line#1 to line number#3
    No. (It's called ActiveCell, not ActiveCells) Presumably you are trying to perform an operation on multiple items. Unfortunately, you need to use a loop. You should defer panel updates if you're doing this a lot.

  • How do I get the tag of a selected line in a tree control ?

    I am running LabVIEW 7.1.
    I want to be able to add a parent or sibling to a tree to a selected item in a tree.

    The tag of the selected item is actually the output of the tree control itself. If you create an indicator from the tree control, you will get a duplicate tree control (indicator), but if you wire the output into a string indicator, the tag of the selected item will show up. You can an item to the tree by wiring the tree reference into an invoke node, calling the method "Edit Tree Items: Add Item", and wiring the output of the tree control (which will be the tag of the selected item) into the "Parent Tag" terminal. This method will only let you add a child to an item, you cannot add a parent or sibling. Items cannot have multiple parents, so it wouldn't make sense to add a parent; and to add a sibling for the selected item, you could call the method "Navigate Tree: Get Parent" and pass the tag of the parent into the "Edit Tree Items: Add Item" method.
    Robert Mortensen
    Software Engineer
    National Instruments

  • Can I edit the data already displayed in tree control?

    I'm using a tree control to display some data in front panel. But after running the program, can I edit the data already displayed in tree control by using input control and let it change and display dynamically? In invoke nodes I can only find add or delete items in tree but can't find edit...

    There is no direct editing option available, same can be achieved in two steps by using
    --> Add Item Invoke Node
    --> Delete Item Invoke Node
    I am not allergic to Kudos, in fact I love Kudos.
     Make your LabVIEW experience more CONVENIENT.

  • Tree control: How to disable the selection of a child item

    Hello everyone,
    Im having trouble with disabling the selection of a child item in a tree control. I dont know if its possible but havent found any answers on this forum regarding this issue.
    Example:
    Parent tag 1
        child item 1
        child item 2
    Parent tag 2
        child item a
        child item b
    What i would like to do is being able to select the parent tags but not the child items, because i use the name of the selected item in my program to determine which actions are allowed and those that are not. To avoid this problem i look at the first 4 letters of the name and this way i can determine if it is a parent tag or child item and take appropriate action. Im able to do this because the parent tags have fixed names. But even though nothing happens in software if i select a child item it still lights up, so for the user of the program it looks as if the child items is selected but the program doesnt do anything(because i made it that way). Thats why i want to be able to disable the selection of the child item or at least make the selection colour of the child item transparant so it doesnt look like it is selected.
    Can anyone help me with this problem, if there are parts of my question you dont understand, just ask.
    greetz
    Ynse.

    Muks,
    your last image disables the whole tree.
    To programmatically disables an item use ActiveItem.Disabled? property.
    Unfortunately this only has two states, Enabled and disabled (thus grayed).
    Ton
    Free Code Capture Tool! Version 2.1.3 with comments, web-upload, back-save and snippets!
    Nederlandse LabVIEW user groep www.lvug.nl
    My LabVIEW Ideas
    LabVIEW, programming like it should be!

  • How to get access to Row Data (Child Text) in a Tree Control Pragmatically?

    In LabVIEW 2010, I have entered Row Data into a Tree Control pragmatically using the Add Item method and providing the Child Text array and the Child Tag for the Row. When a Row in the Tree Control is selected, I can get the Row Tag in the Value Property of the Tree. But how do I access the Child Text array data when the Row is selected? I can't seem to find a Tree Control Property or Method that will return that data back again.
    What I am trying to do is: once a Row in a Tree is selected and a button is pushed, if the Row Tag is valid, I want to transfer all of the Row data into another similarly formatted Tree. To do that I need the Row Data for the Tree and Row that was selected. I can not find a way to get access to this Row Data after it has been entered into the Tree.
    Can anyone tell me how to pragmatically access the Child Text or Row Data in a Tree Control from a selected Row in the Tree? I have the Tag for the Row, but how do I access the data?
    Thanks for your assistance.
    Solved!
    Go to Solution.

    As mentioned in the posting here, you can use the Active Item:Tag property to set the item to which subsequent property changes apply. This includes pulling the Active Celltring values out in a for loop as you increment the Active Cell:Active Column Number to get the row's Child Text data programmatically as I was originally wanting to do.
    Note that wiring a 0 to the ActiveColNum property and reading the String value will return the tree item's visible name (in column 0), but not the unique item Tag (which is somewhat intangible after its creation). Therefore, I save the unique item tag when I add the item to the tree control (the output of the Add Item invoke node) and store it as a separate column of the Child Text array and place it out of sight in the tree control so I have access to it later. It might be useful, it might not.
    I find the tree control totally non-intuitive and not well explained anywhere, but that's how a lot of LabVIEW coding is I guess. Play with it long enough and you become an expert. I had to learn the hard way, but I hope this helps someone else.
    -Richard
    "Computers are useless. They can only give you answers." - Pablo Picasso

  • Scrollbar in Tree Control = wonky

    The TREE control scrollbar seems to have some ill-thought-out behavior.
    1... Run the example TREE ENHANCEMENTS (Examples - Building UIs - Displaying Data - General )
    2... Choose a folder on your machine with a few (3-5) folders in it but lots of files and folders contained within those folders.
    3... Select the PATTERN as appropriate.
    4... Run the VI.  Your files should show up in the list, then the list collapses.
    5... Expand the folders, so that there are more items in the list than it can display at one time.
    6... The scrollbar appears (that's sensible).
    7... Scroll down so that items disappear off the top.
    8... Right click and choose CLOSE ALL ITEMS
    --- I would expect the control to automatically move back up to the top, so you could see something, but it doesn't.
    9... Play with the scrollbar thumb.  Not exactly sensible.
    Here is a JING to watch, showing this behavior.
    The code that populates this tree is copied from the example (and modified to remove file extensions).
    Once the tree is populated, the code is doing nothing (except waiting for a QUIT button).
    Steve Bird
    Culverson Software - Elegant software that is a pleasure to use.
    Culverson.com
    Blog for (mostly LabVIEW) programmers: Tips And Tricks

    Just run the example I mentioned.  It's not code that does it - it's the behavior of the tree control itself.
    But you need to structure the folders so that you have a few (< # lines in tree) root-level folders, and many (> #lines in tree) sub-folders/files, whatever.
    When you collapse the tree, I would expect the scrollbar to adapt to the new situation, and possibly disappear.  Instead, it's working on old information, I suppose.
    Steve Bird
    Culverson Software - Elegant software that is a pleasure to use.
    Culverson.com
    Blog for (mostly LabVIEW) programmers: Tips And Tricks

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