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List Control Allow Null Selection

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    List Control Allow Null Selection

    In a list control, if Allow Null Selection is unchecked, there should always be a row selected.

    I have found that some List Controls Actions, for example Refresh Data, result in a list with no rows selected.

    Attached is a very simple list that uses the sample static data. Allow Null Selection is unchecked.

    There is a button that executes List Action - Filter List-Client-side. After a filter is applied no row is selected.

    I know there are methods to select a row, but if there are rows in the list, should it not automatically select a row?

    TestListAllowNull.a5wcmp

    #2
    Re: List Control Allow Null Selection

    At the end of the setFilter method, I see in the code:
    Code:
    if (this._data.length != 0) this.populate(this._data, true, false, false);
    So then when I look at the populate method, I see:

    Code:
    if (!this.allowNullSelection && data.length != 0 && !(keepVal && oldVals.length != 0)) this._selectItem(0);
    I guess one of those conditions is not true.
    keepVal is set to true in the arguments and to select the previously selected item 0 it should be !true... unless I'm reading it wrong.
    If you select a row with "NY" before you filter, then filter with your filter, previously selected item 0 is selected.
    Last edited by jgrannis; 02-23-2018, 06:52 PM.

    Comment


      #3
      Re: List Control Allow Null Selection

      Hi Jeff, I am not sure where you are seeing that code. Are you saying that it should automatically select a row?

      Comment


        #4
        Re: List Control Allow Null Selection

        Searching and Filtering Lists with the property Allow Null Selection either on or off is very, very buggy. Here's another thread talking about the same area.

        https://www.alphasoftware.com/alphaf...highlight=null

        You should report this as a bug.

        For now you can just turn your action into code... and then add this after your filter...

        Code:
        listObj.setValue(0);
        Last edited by Davidk; 02-24-2018, 01:44 PM.

        Comment


          #5
          Re: List Control Allow Null Selection

          I sent a bug report. This has been fixed. I believe it is in the most recent pre-release build.

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