eclipse插件获取ImageDescriptor的方法

最新推荐文章于 2022-11-03 09:39:16 发布

dingnate

最新推荐文章于 2022-11-03 09:39:16 发布

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分类专栏： Eclipse Java

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本文介绍了如何在Eclipse插件开发中利用AbstractUIPlugin和org.eclipse.jface.resource.ImageDescriptor类来有效地获取和使用图像描述符。

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org.eclipse.ui.plugin.AbstractUIPlugin

public static ImageDescriptor imageDescriptorFromPlugin(String pluginId,
            String imageFilePath) {
        if (pluginId == null || imageFilePath == null) {
            throw new IllegalArgumentException();
        }

		IWorkbench workbench = PlatformUI.isWorkbenchRunning() ? PlatformUI.getWorkbench() : null;
		ImageDescriptor imageDescriptor = workbench == null ? null : workbench
				.getSharedImages().getImageDescriptor(imageFilePath);
		if (imageDescriptor != null)
			return imageDescriptor; // found in the shared images

        // if the bundle is not ready then there is no image
        Bundle bundle = Platform.getBundle(pluginId);
        if (!BundleUtility.isReady(bundle)) {
			return null;
		}

        // look for the image (this will check both the plugin and fragment folders
        URL fullPathString = BundleUtility.find(bundle, imageFilePath);
        if (fullPathString == null) {
            try {
                fullPathString = new URL(imageFilePath);
            } catch (MalformedURLException e) {
                return null;
            }
        }

        return ImageDescriptor.createFromURL(fullPathString);
    }

org.eclipse.jface.resource.ImageDescriptor

public static ImageDescriptor createFromURL(URL url) {
        if (url == null) {
            return getMissingImageDescriptor();
        }
        return new URLImageDescriptor(url);
    }

public static ImageDescriptor createFromFile(Class location, String filename) {
        return new FileImageDescriptor(location, filename);
    }public static ImageDescriptor createFromImageData(ImageData data) {
        return new ImageDataImageDescriptor(data);
    }