MACROMEDIA FLEX-GETTING STARTED WITH FLEX Uživatelský manuál stáhnout pdf (Strana 98)

<mx:Script>

<![CDATA[

private function onMilesChange( event:Event ) : void {

var miles:Number = parseFloat( txtMiles.text );

var mile:Number = 1.0;

var weeks:int = 0;

var weekData:Array = [];

while( mile < miles ) {

weeks += 1;

weekData.push( { week: weeks, miles: Math.round( mile * 10 )

/ 10 } );

mile *= 1.1;

}

dgWeeks.dataProvider = weekData;

txtWeeks.text = weeks.toString();

}

]]>

</mx:Script>

<mx:Form>

<mx:FormItem label="Target Miles">

<mx:TextInput id="txtMiles" change="onMilesChange(event)"

text="3.1" />

</mx:FormItem>

<mx:FormItem label="Weeks">

<mx:Label id="txtWeeks" />

</mx:FormItem>

</mx:Form>

<mx:DataGrid id="dgWeeks">

<mx:columns>

<mx:DataGridColumn dataField="week” headerText="Week” />

<mx:DataGridColumn dataField="miles” headerText="Miles”/>

</mx:columns>

</mx:DataGrid>

</mx:Application>

In this new code, I’ve added an mx:DataGrid control which dis-

plays tabular data. In that grid I’ve defined two columns, one

for the week and another for the miles. Then in the onMile

sChange function I created an array called weekData which con-

tains a list of objects that have week and miles values. I then set

the dataProvider of the data grid to the resultant array, and

voilà, I have a grid of the week and the number of miles.

Figure 6-3 shows the result.

82 | Chapter 6: More Flex Applications

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