MACROMEDIA FLEX-GETTING STARTED WITH FLEX Uživatelský manuál stáhnout pdf (Strana 95)

CHAPTER 6

More Flex Applications

This chapter will show some sample Flex applications to dem-

onstrate

various aspects of Flex development. You can use

these examples as templates for your own applications.

A Runner’s Calculator

Anyone who has taken up running as an exercise knows the

pain of pushing to go too far too fast. It’s commonly held wis-

dom that you should start at 1 mile and then go 10% farther

every week. So, if you want to run 3.1 miles (5K) you should

be training for 12 weeks.

To help calculate that number I’ve come up with a handy help-

er application written in Flex. The first draft of the code is

shown in Example 6-1.

Example 6-1. Runner.mxml

<?xml version="1.0" encoding="utf-8"?>

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"

layout="absolute"

creationComplete="onMilesChange(event)">

<mx:Script>

<![CDATA[

private function onMilesChange( event:Event ) : void {

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

var mile:Number = 1.0;

var weeks:int = 0;

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MACROMEDIA FLEX-GETTING STARTED WITH FLEX Uživatelský manuál Strana 95