Question

I’m trying to make an application with flash builder that performs operations on square matrices. I take in the size of he matrix (n) but now, I am having difficulty figuring out how to generate an n by n grid of text inputs where the user can enter the matrix element values

Answer 1

Yeap, do just like Peter Hall said. Use DataGroup with tile layout.

    <s:DataGroup itemRenderer="Groups.DataGroupRenderer">
        <s:layout>
            <s:TileLayout horizontalGap="5" verticalGap="5" requestedRowCount="3" requestedColumnCount="3"/>
        </s:layout>
        <s:dataProvider>
            <s:ArrayCollection>
                <fx:String>1</fx:String>
                <fx:String>2</fx:String>
                <fx:String>3</fx:String>
                <fx:String>4</fx:String>
                <fx:String>5</fx:String>
                <fx:String>6</fx:String>
                <fx:String>7</fx:String>
                <fx:String>8</fx:String>
                <fx:String>9</fx:String>
            </s:ArrayCollection>
        </s:dataProvider>
    </s:DataGroup>

And renderer:

<?xml version="1.0" encoding="utf-8"?>
<s:ItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009" 
                xmlns:s="library://ns.adobe.com/flex/spark" 
                xmlns:mx="library://ns.adobe.com/flex/mx" 
                autoDrawBackground="true">

    <s:TextInput text="{data}"/>

</s:ItemRenderer>

Of course if you know Flex at least in basic level, you will know how to do it all dynamically.