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Now that you know how the Flex application was written, let s look at how you can integrate it into a PDF document.
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RICH MEDIA ANNOTATIONS
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Rich media annotations aren t part of ISO-32000-1. Support for these annotations was added by Adobe in PDF 1.7 extension level 3. In this case, it isn t sufficient to change the version number to 1.7 with setPdfVersion(); you also have to set the extension level with the addDeveloperExtension() method. You can do this more than once if you re using extensions from different companies. The method expects an instance of the PdfDeveloperExtension class. In listing 16.20, you use the static final object ADOBE_1_7_EXTENSIONLEVEL3. This value was created like this:
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new PdfDeveloperExtension(PdfName.ADBE, PdfWriter.PDF_VERSION_1_7, 3)
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The first parameter refers to the developing company. The second parameter indicates for which PDF version the extension was written. Finally, you pass in the number of the extension level as an int.
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Listing 16.20 FestivalCalendar1.java
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Document document = new Document(); PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(RESULT)); writer.setPdfVersion(PdfWriter.PDF_VERSION_1_7); Sets version and writer.addDeveloperExtension( extension level PdfDeveloperExtension.ADOBE_1_7_EXTENSIONLEVEL3);
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Integrating rich media
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document.open(); RichMediaAnnotation richMedia Creates annotation = new RichMediaAnnotation(writer, object new Rectangle(36, 400, 559,806)); PdfFileSpecification fs = PdfFileSpecification.fileEmbedded( Adds .swf file writer, RESOURCE, "FestivalCalendar1.swf", null); as asset PdfIndirectReference asset = richMedia.addAsset("FestivalCalendar1.swf", fs); RichMediaConfiguration configuration = new RichMediaConfiguration(PdfName.FLASH); RichMediaInstance instance = new RichMediaInstance(PdfName.FLASH); RichMediaParams flashVars = new RichMediaParams(); Configures String vars = new String("&day=2011-10-13"); RichMedia flashVars.setFlashVars(vars); annotation instance.setParams(flashVars); as Flash app instance.setAsset(asset); configuration.addInstance(instance); PdfIndirectReference configurationRef = richMedia.addConfiguration(configuration); RichMediaActivation activation = new RichMediaActivation(); Sets activation activation.setConfiguration(configurationRef); dictionary richMedia.setActivation(activation); PdfAnnotation richMediaAnnotation = richMedia.createAnnotation(); richMediaAnnotation.setFlags(PdfAnnotation.FLAGS_PRINT); writer.addAnnotation(richMediaAnnotation); document.close();
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The RichMediaAnnotation class isn t a subclass of PdfAnnotation, but it can create such an object using the method createAnnotation(). The rich media annotation dictionary contains two important entries: a /RichMediaContent dictionary and a /RichMediaSettings dictionary. These dictionaries are created internally by iText. The RichMediaContent dictionary consists of the assets, the configuration, and the views:
Assets These are stored as a name tree with embedded file specifications. You can use the addAsset() method to add entries to this name tree. Configuration This is an array of RichMediaConfiguration objects. Such an object contains an array of RichMediaInstance objects. Views This is an array of 3D view dictionaries, in case the rich media annotation contains a 3D stream. See listing 16.16.
The RichMediaConfiguration dictionary describes a set of instances that are loaded for a given scene configuration. In this example, you use a rich media annotation to embed a Flash application, but you can also use such an annotation for 3D, sound, or video objects. The constructors of the RichMediaConfiguration and RichMediaInstance classes accept the following parameters:
PDF streams
PdfName._3D For 3D objects PdfName.FLASH For Flash objects PdfName.SOUND For sound objects PdfName.VIDEO For video objects
A RichMediaInstance dictionary describes a single instance of an asset with settings to populate the artwork of an annotation. In this example, you only have one Flash instance, for which you define /FlashVars: &day=2011-10-13. The day variable is retrieved in line C of listing 16.17: Application.application.parameters.day. If you want to reuse the RichMediaContent dictionary in more than one rich media annotation, you have to create the first RichMediaAnnotation as is done in listing 16.20. You can then get a reference to the RichMediaContent dictionary with the getRichMediaContentReference() method, and use this reference as an extra parameter for the RichMediaAnnotation constructor.
NOTE
Rich media annotations can be active or inactive. The RichMediaSettings dictionary stores conditions and responses that determine when the annotation should be activated and deactivated. iText creates this dictionary automatically, just like the RichMediaContent dictionary. It can contain a RichMediaActivation dictionary that is set with the method setActivation(), and a RichMediaDeactivation dictionary set with setDeactivation(). Listing 16.20 uses the default activation and deactivation conditions. The possible conditions for activation set with setCondition() are:
PdfName.XA The annotation is explicitly activated by a user action or script;
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