fr.irisa.triskell.kermeta.KermetaIcons.java Source code

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Here is the source code for fr.irisa.triskell.kermeta.KermetaIcons.java

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/* $Id: KermetaIcons.java,v 1.5 2007-07-24 13:46:39 ftanguy Exp $
 * Project   : fr.irisa.triskell.kermeta (First iteration)
 * File      : KermetaIcons.java
 * License   : EPL
 * Copyright : IRISA / INRIA / Universite de Rennes 1
 * ----------------------------------------------------------------------------
 * Creation date : Feb 14, 2006
 * Authors       : zdrey
 */
package fr.irisa.triskell.kermeta;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.Hashtable;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;

import fr.irisa.triskell.kermeta.plugin.KermetaPlugin;

/**
 * This class is used as an images registry.
 * It automatically loads some images in the initialize method and provides
 * a getImage method to access to image corresponding to the given path.
 * 
 * @author ftanguy
 *
 */
public class KermetaIcons {

    /**
     * This class is a singleton.
     */
    static private KermetaIcons instance = null;

    /**
     * We need to access to images in the plugin hierarchy. This URL will help us.
     */
    static final private URL pluginURL = KermetaPlugin.getDefault().getBundle().getEntry("/");

    /**
     * This is the icons registry : a name corresponds to an image.
     */
    private Hashtable<String, Image> icons = new Hashtable<String, Image>();

    /**
     * A private constructor which just call an initialize method. 
     *
     */
    private KermetaIcons() {
        initialize();
    }

    /**
     * Loads some images whose name come from KermetaConstants class.
     *
     */
    private void initialize() {
        try {
            Image icon_folder = ImageDescriptor.createFromURL(new URL(pluginURL, "/images/folder.gif"))
                    .createImage();
            Image icon_file = ImageDescriptor.createFromURL(new URL(pluginURL, "/images/kermeta.png"))
                    .createImage();
            Image icon_project = ImageDescriptor.createFromURL(new URL(pluginURL, "/images/project.gif"))
                    .createImage();
            Image icon_logo = ImageDescriptor.createFromURL(new URL(pluginURL, "/images/kermeta_logo.gif"))
                    .createImage();
            Image icon_ecoreModelFile = ImageDescriptor
                    .createFromURL(new URL(pluginURL, "/images/EcoreModelFile.gif")).createImage();
            Image icon_generatedPackage = ImageDescriptor
                    .createFromURL(new URL(pluginURL, "/images/generated_package.gif")).createImage();
            icons.put(KermetaConstants.FOLDER, icon_folder); // instance
            icons.put(KermetaConstants.FILE, icon_file);
            icons.put(KermetaConstants.PROJECT, icon_project);
            icons.put(KermetaConstants.KLOGO, icon_logo);
            icons.put(KermetaConstants.IMG_ECORE_FILE, icon_ecoreModelFile);
            icons.put(KermetaConstants.IMG_GENERATED_PACKAGE, icon_generatedPackage);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
    }

    /**
     * 
     * @param path
     * @return
     */
    static public Image get(String path) {
        if (instance == null)
            instance = new KermetaIcons();
        return (Image) instance.icons.get(path);
    }
}