MACROMEDIA FLEX-GETTING STARTED WITH FLEX Uživatelský manuál stáhnout pdf (Strana 109)

<mx:SetProperty target="{this}" name="height"

value="100" />

<mx:SetProperty target="{btnChanger}" name="label"

value="Open" />

</mx:State>

</mx:states>

<mx:transitions>

<mx:Transition fromState="open" toState="closed">

<mx:Parallel duration="500">

<mx:SetPropertyAction target="{btnChanger}" />

<mx:Resize target="{this}"

easingFunction="{mx.effects.easing.Bounce.easeOut}" />

</mx:Parallel>

</mx:Transition>

<mx:Transition fromState="closed" toState="open">

<mx:Parallel duration="500">

<mx:SetPropertyAction target="{btnChanger}" />

<mx:Resize target="{this}"

easingFunction="{mx.effects.easing.Bounce.easeOut}" />

</mx:Parallel>

</mx:Transition>

</mx:transitions>

<mx:Button id="btnChanger" label="Open"

click="onChangerClick(event);" />

</mx:VBox>

Here I am specifying that the transition from open to closed

and vice versa should happen over the course of 500 millisec-

onds and should use a bouncing transition function. This

makes the box kind of jump up and down a little as it goes from

big to small and back to big again. It’s fun to watch.

Transitions can make changes in the interface really fun to play

with. And building transitions in Flex is so easy you will find

yourself using them all the time.

A Simple Video Viewer

Sure, images are easy, but what about video? As it turns out,

video is pretty easy too. The first thing you have to do is to get

your videos into Flash Video (FLV) format. To do the conver-

sion I use an application called FFmpeg (http://

ffmpeg.mplayerhq.hu/). Well, actually I use a GUI wrapper for

States and Transitions | 93

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MACROMEDIA FLEX-GETTING STARTED WITH FLEX Uživatelský manuál Strana 109