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Editorial Team
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Asked: 2026-06-02T23:27:27+00:00

I’m creating a Flex table in which one column is editable. I want to

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I’m creating a Flex table in which one column is editable. I want to restrict the user’s input to certain characters. The following code gives an Could not resolve <s:itemEditor> to a component implementation error. Anyone know how to resolve this?

...
<fx:Array>
    <supportClasses:MyColumn ... />
    <supportClasses:MyColumn editable="true" ...>
        <s:itemEditor>
            <fx:Component>
                <s:TextInput restrict="0-9a-zA-Z"/> 
            </fx:Component>
        </s:itemEditor>
    </supportClasses:MyColumn>
    <supportClasses:MyColumn ... />
    ...
</fx:Array>
...

Where MyColumn is a class and function as follows:

import spark.components.gridClasses.GridColumn;
public class MyColumn extends GridColumn
{
    ...
    public function MyColumn(headerText:String="header" width:Number=100 ...)
    {
       this.headerText=headerText;
       ...
    }
}
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1 Answer

  1. Editorial Team

    I found a solution to your issue on this blog post.

    The issue is that the mxml compiler gets confused when the namespaces don’t match (supportClasses: and s:). The fix is very simple:

    <supportClasses:MyColumn editable="true" ...>
    <supportClasses:itemEditor>
        <fx:Component>
            <s:TextInput restrict="0-9a-zA-Z"/> 
        </fx:Component>
    </supportClasses:itemEditor>
</supportClasses:MyColumn>
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