Adobe 65018518 User Guide - Page 370

Using Flex metadata, > Convert Symbol to Flex Component.

Page 370 highlights

USING FLASH CS4 PROFESSIONAL 365 ActionScript 3 Launch Flash. Two new commands appear in the Commands menu, Convert Symbol to Flex Component and Convert Symbol to Flex Container. 4 In Flash, create a movie clip symbol containing the artwork and ActionScript 3.0 code you want to include in the Flex component. The content must be contained in a movie clip symbol before conversion to a Flex component. 5 Before converting the movie clip to a Flex component, be sure that it meets the following requirements for compatibility with Flex: • The frame rate of the FLA file should be 24 fps and should match the frame rate of any Flex projects that will make use of the component. • The registration point should be located at the 0, 0 point in the movie clip. Note: To ensure that all content in the movie clip has a registration point of 0, 0, click the Edit Multiple Frames button at the bottom of the Timeline, select all frames in the movie clip timeline, select all of your content in all the frames, and move it to 0, 0 in the Property inspector. 6 Select the movie clip in the Library panel and choose Commands > Convert Symbol to Flex Component. Flash converts the movie clip to a Flex component, changes its icon to a Flex icon in the Library, and imports the FlexComponentBase class compiled clip to the Library. Flash embeds the FlexComponentBase into the Flex component SCW file created in the next step. Note the progress messages displayed in the Output panel while Flash converts the movie clip. 7 Choose File > Publish to create a SWC file containing the compiled Flex component. Flash also creates a SWF file from the main FLA file, but you can ignore the SWF file if you choose. The published component SWC file is now ready for use in Flex. 8 To use the SWC file in Flex, do one of the following: • Copy the SWC file from Flash and paste it into the bin folder of your Flex project. • Add the SWC file to library path of your Flex project. For more information, see the Flex Builder documentation at www.adobe.com/go/learn_flexresources_en. Using Flex metadata If you are writing ActionScript 3.0 code to be used in Flex, you can place metadata in the code to embed external files in any published SWF that includes the ActionScript code. Usually, these [Embed] metadata declarations are used to embed image files, fonts, individual symbols, or other SWF files into the SWF. Remember that metadata is "data about data." You add metadata to ActionScript on the line immediately preceding the line of code that the metadata applies to. The compiler then takes the metadata into account when compiling the line of code that follows it. For example, to embed an image called button_up.png that is stored in the directory one level above the ActionScript file, you would use the following ActionScript: [Embed("../button_up.png")] private var buttonUpImage:Class; The [Embed] metadata tag tells the compiler to embed the file named button_up.png in the SWF file and that the file should be associated with the variable named buttonUpImage. For more information about embedding assets with metadata in Flex, see Embedding Assets in the Flex 3 Developer Guide at www.adobe.com/go/learn_flexresources_en. Updated 5 March 2009

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365
USING FLASH CS4 PROFESSIONAL
ActionScript
3
Launch Flash. Two new commands appear in the Commands menu, Convert Symbol to Flex Component and
Convert Symbol to Flex Container.
4
In Flash, create a movie clip symbol containing the artwork and ActionScript 3.0 code you want to include in the
Flex component. The content must be contained in a movie clip symbol before conversion to a Flex component.
5
Before converting the movie clip to a Flex component, be sure that it meets the following requirements for
compatibility with Flex:
The frame rate of the FLA file should be 24 fps and should match the frame rate of any Flex projects that will
make use of the component.
The registration point should be located at the 0, 0 point in the movie clip.
Note:
To ensure that all content in the movie clip has a registration point of 0,
0, click the Edit Multiple Frames
button at the bottom of the Timeline, select all frames in the movie clip timeline, select all of your content in all the
frames, and move it to 0, 0 in the Property inspector.
6
Select the movie clip in the Library panel and choose Commands
> Convert Symbol to Flex Component.
Flash converts the movie clip to a Flex component, changes its icon to a Flex icon in the Library, and imports the
FlexComponentBase class compiled clip to the Library. Flash embeds the FlexComponentBase into the Flex
component SCW file created in the next step.
Note the progress messages displayed in the Output panel while Flash converts the movie clip.
7
Choose File
> Publish to create a SWC file containing the compiled Flex component. Flash also creates a SWF file
from the main FLA file, but you can ignore the SWF file if you choose. The published component SWC file is now
ready for use in Flex.
8
To use the SWC file in Flex, do one of the following:
Copy the SWC file from Flash and paste it into the bin folder of your Flex project.
Add the SWC file to library path of your Flex project. For more information, see the Flex Builder documentation
at
www.adobe.com/go/learn_flexresources_en
.
Using Flex metadata
If you are writing ActionScript 3.0 code to be used in Flex, you can place metadata in the code to embed external files
in any published SWF that includes the ActionScript code. Usually, these
[Embed]
metadata declarations are used to
embed image files, fonts, individual symbols, or other SWF files into the SWF.
Remember that metadata is “data about data.” You add metadata to ActionScript on the line immediately preceding
the line of code that the metadata applies to. The compiler then takes the metadata into account when compiling the
line of code that follows it.
For example, to embed an image called button_up.png that is stored in the directory one level above the ActionScript
file, you would use the following ActionScript:
[Embed("../button_up.png")]
private var buttonUpImage:Class;
The
[Embed]
metadata tag tells the compiler to embed the file named button_up.png in the SWF file and that the file
should be associated with the variable named
buttonUpImage
.
For more information about embedding assets with metadata in Flex, see Embedding Assets in the Flex 3 Developer
Guide at
www.adobe.com/go/learn_flexresources_en
.
Updated 5 March 2009