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Eclipse Platform
Release 3.0

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Package org.eclipse.jface.resource

Provides support for managing resources such as SWT fonts and images.

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Description

Class Summary

ColorRegistry	A color registry maintains a mapping between symbolic color names and SWT Colors.
CompositeImageDescriptor	Abstract base class for image descriptors that synthesize an image from other images in order to simulate the effect of custom drawing.
FontRegistry	A font registry maintains a mapping between symbolic font names and SWT fonts.
ImageDescriptor	An image descriptor is an object that knows how to create an SWT image.
ImageRegistry	An image registry maintains a mapping between symbolic image names and SWT image objects or special image descriptor objects which defer the creation of SWT image objects until they are needed.
JFaceColors	JFaceColors is the class that stores references to all of the colors used by JFace.
JFaceResources	Utility methods to access JFace-specific resources.
ResourceRegistry	Abstract baseclass for various JFace registries.
StringConverter	Helper class for converting various data types to and from strings.

Exception Summary

DataFormatException

An exception indicating that a string value could not be converted into the requested data type.

Package org.eclipse.jface.resource Description

Provides support for managing resources such as SWT fonts and images.

Package Specification

This package contains support for managing resources, including:

• font registries (FontRegistry) - for hanging on to the SWT font objects needed by an application

• image registries (ImageRegistry) - for hanging on to the SWT image objects needed by an application

• image descriptors (ImageDescriptor) - surrogate object for creating SWT images

• string conversion (StringConverter) - for parsing property files

The JFace resources module is an independent JFace module requiring a basic knowledge of SWT and the JFace property change event mechanism. Familiarity with other JFace modules is not required.

Image descriptors are objects that knows how to create an image on demand. They serve as a lightweight representation of images in situations where no SWT display exists yet, and are used mainly in conjunction with image registries. This package contains the image descriptor framework, which is a simple hierarchy rooted at the abstract class ImageDescriptor. The framework includes abstract subclasses for composing images (CompositeImageDescriptor) as well as a ready-made concrete subclass for loading images from files (FileImageDescriptor).

The class JFaceResources maintains global state on behalf of JFace itself consisting of JFace's own image registry, font registry, resource bundle, and preference store.