Uploaded image for project: 'Apache Flex'
  1. Apache Flex
  2. FLEX-28929

Binding not working in Flex 4 but working in Flex 3

    XMLWordPrintableJSON

    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: Adobe Flex SDK 4.5.1 (Release)
    • Fix Version/s: None
    • Component/s: Data Binding
    • Labels:
      None
    • Environment:
      Affected OS(s): All OS Platforms
      Language Found: English

      Description

      When upgrading our application from Flex 3 to Flex 4, we noticed some issues where bindings are no longer correctly executed. Attached is an isolated example and the sources (and the generated AS code) for a Flex 3 and a Flex 4 sample. The Flex 3 code works, while the Flex 4 code does not.

      While comparing the generated code, I noticed that the bindings that are created are slightly different. In the Flex 3 example, a anonymous function is passed to handle the update of the binding, while in the Flex 4 example, a null value is passed. There are some other differences, but this was the one that caught my attention.

      A workaround is to add the binding via BindingUtils.bindProperty() in the creationComplete handler of the component where the binding is defined.

      ***

      Binding code:

      <mx:CheckBox id="c"
      label="Test"
      selected="

      {DataGridContainer(parent.parent.parent).checked}

      "/>

      Flex 3 generated:

      new mx.binding.Binding(this,
      function():Boolean

      { return (DataGridContainer(parent.parent.parent).checked); },
      function(_sourceFunctionReturnValue:Boolean):void
      { c.selected = _sourceFunctionReturnValue; },
      "c.selected");

      Flex 4 generated:

      new mx.binding.Binding(this,
      function():Boolean
      { return (DataGridContainer(parent.parent.parent).checked); }

      ,
      null,
      "c.selected");

      Workaround:

      BindingUtils.bindProperty(c, "selected", DataGridContainer(parent.parent.parent), "checked");

        Attachments

          Activity

            People

            • Assignee:
              Unassigned
              Reporter:
              adobejira Adobe JIRA
            • Votes:
              0 Vote for this issue
              Watchers:
              0 Start watching this issue

              Dates

              • Created:
                Updated: