org.projectusus.ui.colors.UsusUIImages.java Source code

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Here is the source code for org.projectusus.ui.colors.UsusUIImages.java

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// Copyright (c) 2009-2010 by the projectusus.org contributors
// This software is released under the terms and conditions
// of the Eclipse Public License (EPL) 1.0.
// See http://www.eclipse.org/legal/epl-v10.html for details.
package org.projectusus.ui.colors;

import java.net.MalformedURLException;
import java.net.URL;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;
import org.osgi.framework.Bundle;
import org.projectusus.core.util.Defect;
import org.projectusus.ui.internal.UsusUIPlugin;

public class UsusUIImages implements ISharedUsusImages {

    private static URL baseUrl;
    private static final ISharedUsusImages _instance = new UsusUIImages();
    private ImageRegistry imageRegistry;

    static {
        String pathPrefix = "icons/full/"; //$NON-NLS-1$
        try {
            Bundle bundle = UsusUIPlugin.getDefault().getBundle();
            baseUrl = new URL(bundle.getEntry("/"), pathPrefix); //$NON-NLS-1$
        } catch (MalformedURLException malfux) {
            throw new Defect(malfux);
        }
    }

    private final static String OBJECT = "obj16/"; // basic colors - size 16x16 //$NON-NLS-1$
    private final static String VIEW = "eview16/"; // basic colors - size 16x16 //$NON-NLS-1$

    private UsusUIImages() {
        // no instantiation
    }

    public static ISharedUsusImages getSharedImages() {
        return _instance;
    }

    public Image getImage(String key) {
        return getImageRegistry().get(key);
    }

    public ImageDescriptor getDescriptor(String key) {
        return getImageRegistry().getDescriptor(key);
    }

    private void declareImages() {
        declare(OBJ_CODE_PROPORTIONS, OBJECT + "codeproportions.gif"); //$NON-NLS-1$
        declare(OBJ_INFO, OBJECT + "info.gif"); //$NON-NLS-1$
        declare(OBJ_WARNINGS, OBJECT + "warnings.gif"); //$NON-NLS-1$
        declare(VIEW_WARNING, VIEW + "warning.gif"); //$NON-NLS-1$
        declare(OBJ_LEVELUP, OBJECT + "levelup.gif"); //$NON-NLS-1$
        declare(OBJ_LEVELDOWN, OBJECT + "leveldown.gif"); //$NON-NLS-1$
        declare(OBJ_NEW, OBJECT + "new.gif"); //$NON-NLS-1$
        declare(OBJ_DELETED, OBJECT + "deleted.gif"); //$NON-NLS-1$
    }

    private void declare(final String key, final String path) {
        ImageDescriptor desc = ImageDescriptor.getMissingImageDescriptor();
        try {
            desc = ImageDescriptor.createFromURL(makeIconFileURL(path));
        } catch (MalformedURLException malfux) {
            UsusUIPlugin.getDefault().log(malfux);
        }
        imageRegistry.put(key, desc);
    }

    private ImageRegistry getImageRegistry() {
        if (imageRegistry == null) {
            initializeImageRegistry();
        }
        return imageRegistry;
    }

    private ImageRegistry initializeImageRegistry() {
        imageRegistry = new ImageRegistry(Display.getDefault());
        declareImages();
        return imageRegistry;
    }

    private URL makeIconFileURL(final String iconPath) throws MalformedURLException {
        if (baseUrl == null) {
            throw new MalformedURLException();
        }
        return new URL(baseUrl, iconPath);
    }

    public Image getTrendImage(int trend) {
        if (trend == 0) {
            return null;
        }
        return getImage(trend > 0 ? OBJ_LEVELDOWN : OBJ_LEVELUP);
    }

    public Image getTrendImage(int oldMetricsValue, int currentMetricsValue) {
        if (oldMetricsValue == 0) {
            return getImage(OBJ_NEW);
        }
        if (currentMetricsValue == 0) {
            return getImage(OBJ_DELETED);
        }
        if (oldMetricsValue == currentMetricsValue) {
            return null;
        }
        return getImage(currentMetricsValue > oldMetricsValue ? OBJ_LEVELDOWN : OBJ_LEVELUP);
    }

}