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Clearing a from variable attached to a tree

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    #1

    Clearing a from variable attached to a tree

    I have attached a simple db to illustrate my problem.

    I have a variable field on a form that has a control type of tree. The tree uses a table lookup for population

    Once a value has been selected, I would like to be able to click a button that would clear the value stored in the variable (so variable ="") and refresh the tree so it no longer highlights the last value selected. IF the tree would collapse as well that would be great.

    I can set the variable value to "" but the tree still highlights the last value selected.

    I can get the tree to collapse but it then sets the variable to the first value in the tree.

    In my actual app, i want to use this technique so a person can click on a value in the tree and a browse on the form will filter to that value. However, I will need to be able to both reset the variables value and reset the tree control through a button push.

    Any thoughts.
    T
    Tags: None
    #2
    Re: Clearing a from variable attached to a tree

    Hi Tony,

    Refreshes do seem to be the bane of Alpha...or Alpha developers, however you want to look at it.

    Here is a "nice", convoluted way that works until you or someone else finds a better way!! :)

    Replace your button's OnPush event with this:

    Code:
    topparent:Tree1.activate()
topparent:Tree0.value =""
topparent:Tree0.activate()

topparent:Tree0.value =""
topparent:button1.activate()
    Mike
    __________________________________________
    It is only when we forget all our learning that we begin to know.
    It's not what you look at that matters, it's what you see.
    Henry David Thoreau
    __________________________________________



    Comment

      #3
      Re: Clearing a from variable attached to a tree

      Thanks again Mike! At this point convoluted is great!!!
      I will give this a try and see what I get.
      T

      Comment

        #4
        Re: Clearing a from variable attached to a tree

        Mike,
        We are getting closer. I think i need to post the actual form that holds this process.

        Here is what I am looking to do with this form...I want to be able to sort my client list (located in the embedded browse) in two ways:
        1) if the build filter checkbox is not checked: each time the user selects a value from the trees or other fields the client browse is filtered to that value. IOW...Each time a new value is select the browse filters to just that value.

        2) if the build filter checkbox is checked: each time a value is selected it is added to the filter expression...so the filter builds upon the users concurrent selections.

        When the user checks or unchecks the build filter box and when the user selects the show all button, the filter should be cleared, variable values set to "", the trees reset, and the browse refreshed to show all records.

        Your solution does everything but show all records in the embedded browse. Actually, when I used it, it hid all records in the browse, even when i added topparent.show_all(), and/or topparent:browsename.show_all() and fetch_first() for both. If you click the button a second time the browse will then show all records.

        it appears that the form stays filtered as the clear filter button is still active on the toolbar and pressing it will then show all records in the browse.


        Thanks again for your help.

        Comment

          #5
          Re: Clearing a from variable attached to a tree

          Tony,

          Use this

          Take the topparent.show_all() out. Add this. Notice that having "topparent" is not always necessary and "parentform" will work as well.
          Code:
          Clnt_Brws.activate()
topparent:Clnt_Brws.show_all()
          Mike
          __________________________________________
          It is only when we forget all our learning that we begin to know.
          It's not what you look at that matters, it's what you see.
          Henry David Thoreau
          __________________________________________



          Comment

            #6
            Re: Clearing a from variable attached to a tree

            Why is the topparent not necassary in this situation? I thought you always needed it to reference an object on a form.

            Also, in this particular situation...is there a difference between using topparent and parentform? Do they do the same thing?

            Thanks again.
            T

            Comment

              #7
              Re: Clearing a from variable attached to a tree

              Tony,
              I figured I might have triggered something when I did that to you! Just so you know, I most times use the Object Explorer to copy script to the clipboard and it always uses "topparent" and so I do usually use that...but just wanted to let you know that there are other acceptable ways as well.

              If you are referring to the form that currently has focus usually nothing is needed. Here is a link that will explain it much better than I can...

              http://support.alphasoftware.com/alp...se_Objects.htm


              BTW--Don't know if it is only in your sample, but your Select List/Unselect List is referring to "browse1" and should be using "Clnt_brws".
              Mike
              __________________________________________
              It is only when we forget all our learning that we begin to know.
              It's not what you look at that matters, it's what you see.
              Henry David Thoreau
              __________________________________________



              Comment

                #8
                Re: Clearing a from variable attached to a tree

                Thanks for the info. I will read up on it.

                As for the checkbox, thanks for pointing that out. I was focusing on the show all button and forgot to update the check box.
                T
                Last edited by reynolditpi; 07-17-2008, 01:55 PM.

                Comment

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