Examples of org.eclipse.jface.resource.ImageDescriptor

org.eclipse.jface.resource.ImageDescriptor
An image descriptor is an object that knows how to create an SWT image. It does not hold onto images or cache them, but rather just creates them on demand. An image descriptor is intended to be a lightweight representation of an image that can be manipulated even when no SWT display exists.
This package defines a concrete image descriptor implementation which reads an image from a file (FileImageDescriptor). It also provides abstract framework classes (this one and CompositeImageDescriptor) which may be subclassed to define news kinds of image descriptors.

Using this abstract class involves defining a concrete subclass and providing an implementation for the getImageData method.

There are two ways to get an Image from an ImageDescriptor. The method createImage will always return a new Image which must be disposed by the caller. Alternatively, createResource() returns a shared Image. When the caller is done with an image obtained from createResource, they must call destroyResource() rather than disposing the Image directly. The result of createResource() can be safely cast to an Image.
@see org.eclipse.swt.graphics.Image

  @Override
  protected void initializeImageRegistry(ImageRegistry registry) {
    super.initializeImageRegistry(registry);
    Bundle bundle = Platform.getBundle(PLUGIN_ID);
    for (String img_id : IMG_ID_LIST) {
      ImageDescriptor myImage = ImageDescriptor.createFromURL(FileLocator
          .find(bundle, new Path(img_id), null));
      registry.put(img_id, myImage);
    }
  }

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        url = new URL(pluginLocation + path);
      } catch (MalformedURLException e) {
        throw new ImageNotFoundException("Image : " + path + " not found");
      }
  
      ImageDescriptor projectImageDescriptor = ImageDescriptor.createFromURL(url);
      image = projectImageDescriptor.createImage();
      images.put(path, image);
    }
    return image;
  }

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  }


  private static ImageDescriptor createManaged(String prefix, String name,
      String key) {
    try {
      ImageDescriptor result = create(prefix, name, true);
      if (fgAvoidSWTErrorMap == null) {
        fgAvoidSWTErrorMap = new HashMap<String, ImageDescriptor>();
      }
      fgAvoidSWTErrorMap.put(key, result);
      if (fgImageRegistry != null) {

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        return PlatformUI.getWorkbench().getSharedImages().getImage(imageKey);
    }


    public static ImageDescriptor getImageDescriptor(final String name) {


        final ImageDescriptor descriptor = AbstractUIPlugin.imageDescriptorFromPlugin(
                Activator.PLUGIN_ID, name);


        return descriptor;
    }

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    private Image mkImage(final String path) {
        if (path == null) {
            return null;
        }
        final ImageDescriptor imageDescription = AbstractUIPlugin
                .imageDescriptorFromPlugin("org.erlide.ui", path);
        return imageDescription.createImage();
    }

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     *            The image id
     *
     * @return The image descriptor
     */
    public ImageDescriptor getImageDescriptor(final String id) {
        final ImageDescriptor returnImageDescriptor = getImageRegistry()
                .getDescriptor(id);
        return returnImageDescriptor;
    }

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    @Override
    public Image getImage(final Object element) {
        if (element instanceof IErlElement) {
            final IErlElement e = (IErlElement) element;
            final ImageDescriptor desc = ErlangElementImageProvider
                    .getErlImageDescriptor(e, ErlangElementImageProvider.SMALL_ICONS);
            final Image img = ErlideUIPlugin.getImageDescriptorRegistry().get(desc);
            return fProblemDecorator.decorateImage(img, e);
        }
        return null;

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     */
    @Override
    public Image getImage() {
        // final ImageDescriptor descriptor = ErlideUIPlugin.getDefault()
        // .getImageDescriptor("erl");
        final ImageDescriptor descriptor = ErlangElementImageProvider
                .getImageDescriptionFromKind(kind);
        return ErlideUIPlugin.getImageDescriptorRegistry().get(descriptor);
    }

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    @Override
    public Image decorateImage(final Image image, final Object obj) {
        final int adornmentFlags = computeAdornmentFlags(obj);
        if (adornmentFlags != 0) {
            final ImageDescriptor baseImage = new ImageImageDescriptor(image);
            final Rectangle bounds = image.getBounds();
            return ErlideUIPlugin.getImageDescriptorRegistry().get(
                    new ErlangElementImageDescriptor(baseImage, adornmentFlags,
                            new Point(bounds.width, bounds.height)));
        }

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     * @return the image associated with the image descriptor or
     *         <code>null</code> if the image descriptor can't create the
     *         requested image.
     */
    public Image get(final ImageDescriptor descriptor0) {
        final ImageDescriptor descriptor = descriptor0 != null ? descriptor0
                : ImageDescriptor.getMissingImageDescriptor();


        Image result = fRegistry.get(descriptor);
        if (result != null) {
            return result;
        }


        assertThat(fDisplay, is(SWTUtil.getStandardDisplay()));
        result = descriptor.createImage();
        if (result != null) {
            fRegistry.put(descriptor, result);
        }
        return result;
    }

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