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Eclipse Plug-in Developer Guide
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Eclipse Platform
Release 3.5

Package org.eclipse.jface.resource

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


Class Summary
ColorDescriptor Lightweight descriptor for an SWT color.
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.
DeviceResourceDescriptor Instances of this class can allocate and dispose SWT resources.
DeviceResourceManager Manages SWT resources for a particular device.
FontDescriptor Lightweight descriptor for a font.
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.
LocalResourceManager A local registry that shares its resources with some global registry.
ResourceManager This class manages SWT resources.
ResourceRegistry Abstract base class 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.
DeviceResourceException Thrown when allocation of an SWT device resource fails

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
  • color registries (ColorRegistry) - for hanging on to the SWT color 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.

Eclipse Platform
Release 3.5

Guidelines for using Eclipse APIs.

Copyright (c) Eclipse contributors and others 2000, 2008. All rights reserved.

  Published under the terms of the Eclipse Public License Version 1.0 ("EPL") Design by Interspire