<switch>
Prev  Basics  Next

<switch>
Special syntax used to control compilation

Usage

Each <when> block which evaluates to true will include that block of code in the compilation. This provides a mechanism to conditionally include alternate blocks of code, depending on the value of compile-time constants.

The supported attributes for <when> are

  • <property> , which looks at a boolean compile time property: for example <when property="$as3"> checks for Boolean true.
  • <property> with <value> , checks that the given compile time property equals the given literal value: for example <when property="$runtime" value="swf9"> checks for string equality.
  • and, for back compatibility, the <runtime> attribute, equivalent to the above: <when runtime="swf9"> .

The possible compile time constants are:

  • $runtime : string
  • $swf7 : boolean
  • $swf8 : boolean
  • $as2 : boolean
  • $swf9 : boolean
  • $swf10 : boolean
  • $as3 : boolean
  • $dhtml : boolean
  • $j2me : boolean
  • $svg : boolean
  • $js1 : boolean
  • $debug : boolean
  • $profile : boolean
  • $backtrace : boolean

The following examples show the use of the <with> , <unless> , and <otherwise> tags. 

<canvas height="20" width="100%"> <switch> <when property="$dhtml"> <text>This program
						has been compiled for DHTML</text> </when>
						<otherwise> <text>This program has been compiled
						for SWF</text> </otherwise>
						</switch> </canvas>
edit
Flash
edit
HTML5

You can also use <unless> in a similar way. 

<canvas height="20" width="100%"> <switch> <unless property="$swf10"> <text>Not
						SWF10</text> </unless> <otherwise>
						<text>Must be SWF10</text>
						</otherwise> </switch>
					</canvas>
edit
Flash
edit
HTML5

Copyright © 2002-2010 Laszlo Systems, Inc. All Rights Reserved. Unauthorized use, duplication or distribution is strictly prohibited. This is the proprietary information of Laszlo Systems, Inc. Use is subject to license terms.

Prev  Up  Next
<splash view> (swf8)  Home  <unless>