MACROMEDIA FLEX-GETTING STARTED WITH FLEX Instrukcja Użytkownika Pobierz pdf (Strona 57)

strating that container controls can have other containers as

children.

Example 4-4. Using both the VBox and the HBox containers

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

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

backgroundColor="#FFFFFF" backgroundAlpha="0">

<mx:VBox horizontalAlign="center" verticalGap="15">

<mx:HBox verticalAlign="middle" horizontalGap="15">

<mx:Button label="< prev" left="10" top="120" />

<mx:Image source="assets/animals03.jpg"

horizontalCenter="0" top="30"/>

<mx:Button label="next >" right="10" top="120"/>

</mx:HBox>

<mx:Label text="Photographed by Elsie Weil"

horizontalCenter="0" top="250"/>

</mx:VBox>

</mx:Application>

Figure 4-4 shows the result of Example 4-4.

The Canvas Container (Absolute Positioning)

Canvas is

the only container that lets you explicitly specify the

location of its children within the container. The Canvas object

has only one layout value: absolute. You can use the x and y

properties of child components for pixel-perfect layouts. If the

display window is resized, the child components stay fixed in

place and may appear cut off. Using absolute positioning you

can make child controls overlap if desired.

Figure 4-3. An HBox layout

The Canvas Container (Absolute Positioning) | 41

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