---

QuickTime for Java

| Previous | Chapter Top | Next |

Working With the QTDrawable Interface

As we've seen, the QTDrawable interface is used to handle the negotiation between the QTCanvas and one of several QuickTime objects. The QuickTime objects that implement the QTDrawable interface are extensive and include the following:

• the QTPlayer class, which presents the movie controller
• the MoviePlayer or MoviePresenter classes, which present the Movie data type
• the GraphicsImporterDrawer class, which wraps the graphics importer to present images from a data source, typically image files
• the ImagePresenter class, which presents the DSequence but for a single image only, allowing image data to be loaded and kept in memory, providing a faster redraw than the GraphicsImporter object
• the SWCompositor class, which presents the sprite world
• the SGDrawer class, which presents the sequence grabber and sequence grabber channel (video) components
• the GroupDrawable class, which groups QTDrawable objects into the same canvas.
• the QTEffect class, which wraps the visual effects architecture of QuickTime
• the QTImageDrawer class, which allows the results of Java painting into a java.awt.Image to be captured and drawn by QuickTime

The QTDrawable interface is designed to work hand-in-hand with a QTCanvas object. The class that implements this interface draws into the supplied QDGraphics object . The QTCanvas will call the methods of its client (setting its destination QDGraphics , setting display bounds, and redrawing it) as required.

Figure 3 The QTDrawable implementation

| Previous | Chapter Top | Next |